featuring flexibility quick-reference guidequick-reference guide for piping, wiring & u-control...

Series 3

Thisguidemustonlybeusedbyaqualifiedheatinginstaller/servicetechnician.Readallinstructions,includingthisUltraboilermanualandallotherinformationshippedwiththeboiler,beforeinstalling.Performstepsintheordergiven.Failuretocomplycouldresultinseverepersonalinjury,deathorsubstantialpropertydamage.

Gas-fired water boilers – Series 3

Featuring

Flexibility

Partnumber550-100-110/0411

®

Quick-Reference GuideFor Piping, Wiring & U-Control Setups

Thisguideismeanttobeusedasageneralguideline

forpipingandcontrollingUltraSeries3boilersin

avarietyofapplications.Someinstallationscan

bepipedinnumerousotherwaysthatwillwork

equallyaswellasthesuggestionshere.

Alwaysfollowrecognizedpipingandcontrolprac-

ticesandallapplicablecodes.Provideandinstall

allrequiredcontrolsontheboilerandsystem.

SeetheContentslistingandtheApplicationfinder

toselectthesystemclosesttoyourneeds.

Refer to the Ultra Boiler manual for details on

expansiontankpiping,reliefvalvepipingandpipe

sizing.

Thisguideprovidesapplicationinformationonly.

ItmustbeusedonlyasasupplementtotheUltra

Boilermanualandapplicablecoderequirements.

FollowallinstructionsintheUltraBoilermanual

forinstallationandstart-up.

Hazard definitions

Thefollowingdefinedtermsareusedthroughoutthismanualto

bringattentiontothepresenceofhazardsofvariousrisklevelsor

toimportantinformationconcerningthelifeoftheproduct.

Indicatespresenceofhazardsthatwillcause

severepersonalinjury,deathorsubstantial

propertydamage.

Indicatespresenceofhazardsthatcancause

severepersonalinjury,deathorsubstantial

propertydamage.

Indicatespresenceofhazardsthatwillor

cancauseminorpersonalinjuryorproperty

damage.

Indicatesspecialinstructionsoninstallation,

operationormaintenancethatareimportant

butnotrelatedtopersonalinjuryorproperty

damage.

Partnumber550-100-090/08092

Read before proceeding

Partnumber550-100-110/0411

gas-fired water boiler — Application Guides

2

Contents

General piping requirements . . . . . . . . . . . . . . . 4The Ultra boiler must ALWAYS be piped in a secondary loop off of the primary loop

Weil-McLain Easy-Up® Manifold . . . . . . . . . . . . . 5Factory-built manifolds including near-boiler piping and system sec-ondary connection

U-Control Screens . . . . . . . . . . . . . . . . . . . . . 6

U-Control menu access . . . . . . . . . . . . . . . . . . 7BOILER SETTINGS | SYSTEM SETTINGS

Application 1 . . . . . . . . . . . . . . . . . . . . . . . . 8Single-zone BASEBOARD | DHW (Direct-connected)

Application 2 . . . . . . . . . . . . . . . . . . . . . . . .10Single-zone FAN COIL(S) | DHW (Direct-connected)

Application 3 . . . . . . . . . . . . . . . . . . . . . . . .12Single-zone CAST IRON RADIATORS | DHW (Direct-connected)

Application 4 . . . . . . . . . . . . . . . . . . . . . . . .14Multi-zone SPACE HEATING (Circulators + WMCR) | DHW (As zone in system)

Application 5 . . . . . . . . . . . . . . . . . . . . . . . .16Multi-zone RADIANT | DHW (Direct-connected) | HEAT EXCHANGER (WMBP or WMPH) (<30% of total heat loss)

Application 6 . . . . . . . . . . . . . . . . . . . . . . . .18Multi-zone RADIANT | DHW (Direct-connected) | Small BASEBOARD zone (<30% of total heat loss)

Application 7 . . . . . . . . . . . . . . . . . . . . . . . .20Multiple HI-TEMP HEATING zones | DHW (Direct-connected) | Small RADIANT zone (<30 of total heat loss)

Application 7a . . . . . . . . . . . . . . . . . . . . . . .22Multi-zone HI-TEMP HEATING plus RADIANT (with mixing valve) | DHW (Direct-connected) (No limits on the relative heating loads of radiant or hi-temp space heating circuits)

Application 8 . . . . . . . . . . . . . . . . . . . . . . . .24Multi-zone BASEBOARD (Zone valves + WMZV controller) | DHW (Direct-connected)

Application 9 . . . . . . . . . . . . . . . . . . . . . . . .26Multi-zone BASEBOARD (Circulators + WMCR controller) | DHW (Direct-connected)

Application 10 . . . . . . . . . . . . . . . . . . . . . . .28Multi-zone FAN COILS (Circs. + WMCR contr.) | DHW (Direct-con-nected) | Small RADIANT zone (<30% of total heat loss)

Application 11 . . . . . . . . . . . . . . . . . . . . . . .30CAST IRON RADIATORS | DHW (Direct-connected) | Small RADIANT zone (<30% of total heat loss)

Application 12 . . . . . . . . . . . . . . . . . . . . . . .32FAN COIL zone | BASEBOARD zone | Small RADIANT zone (<30% of total heat loss)

Application 13 . . . . . . . . . . . . . . . . . . . . . . .34

Single-zone BASEBOARD | DHW (System, as zone)

Application 14 . . . . . . . . . . . . . . . . . . . . . . .36

Multi-zone BASEBOARD (Zone valves) | Multi-zone RADIANT (Zone valves) | DHW (Direct-connected) (Radiant load must be <30% of total heat loss)

Application 15 . . . . . . . . . . . . . . . . . . . . . . .38

Single-zone BASEBOARD | Single-zone RADIANT | POOL Heat exchanger (Radiant load must be <30% of total heat loss)

Application 16 . . . . . . . . . . . . . . . . . . . . . . .40

Single or Multi-zone SPACE HEATING | DHW (Direct-connected) | ISOLATION Heat exchanger (Tall buildings) (Use where space heating system operating pressure is over 25 PSIG)

Multiple boiler operation options . . . . . . . . . . . . .42

Using the U-Control settings

Application 17 — Multiple heat sources . . . . . . . . .44

ALTERNATIVE Heat source as primary / ULTRA as back-up | Single-zone BASEBOARD or FAN COIL — DHW (Direct-connected)

Application 17a — Multiple heat sources . . . . . . . .46

NON-HYDRONIC PRIMARY Heat source as Type 1 (LEAD) / ULTRA as Type 2 (BACKUP) — Single-zone or multi-zone BASEBOARD or FAN COIL | DHW (Direct-connected)

Application 18 — Multiple boilers . . . . . . . . . . . .48

Multiple Ultra boilers | Multiple-zone SPACE HEATING (Circulators with WMCR) | DHW (Direct-connected)


Multiple Ultra boilers | Multi-zone SPACE HEATING & DHW (In system) (Circulators with WMCR controllers)


Multiple Ultra boilers | Multiple loads on SECONDARY loops | DHW (Direct-connected)


BASE LOADING with ULTRA boilers | DHW (Direct connected)

Appendix A . . . . . . . . . . . . . . . . . . . . . . . . .64

OUTDOOR RESET Settings and Troubleshooting

Appendix B . . . . . . . . . . . . . . . . . . . . . . . . .65

BOILER SETTINGS menu detail

Appendix C . . . . . . . . . . . . . . . . . . . . . . . . .66

SYSTEM SETTINGS menu detail

Partnumber550-100-110/0411 3


General piping requirementsThe Ultra boiler must ALWAYS be piped in a secondary loop off of the primary loop

INSTALLING THE PRIMARY/SECONDARY TEES

Thenear-boilerpipingmustbeprimary/second-aryasshownaboveandleft,withtheboilerlooppipingentering the tees in thebranchconnec-tion.

DONOTconnectboilerpipingtotheteethroughconnectionsasshownatright.Thesystemwillnotworkcorrectlythisway.

Thecirculatorsuppliedwiththeboiler(a)mustbeusedonly

intheboilersecondaryloopasshownintheschematicabove

andinthemanual.System(b)andzonecirculatorsandDHW

circulator(c)mustbesuppliedbytheinstaller.Aboverightis

atypicalinstallation,showingthenear-boilerpipingandcon-

nectiontothesystem.

Boilerlooppipingmustbesizedtotheminimumslistedintheboilermanual.Usingsmallerpipingwillcauseperformanceproblems.

• Ultra-80/Ultra-105. . . . . . . . . . .use1”orlarger

• Ultra-155/Ultra-230. . . . . . . . . . .use1¼”orlarger

• Ultra-299/Ultra-399. . . . . . . . . . .use1½”orlarger

WRONGRIGHT

DHW

DHW

System

Sensor

Sensor

Gas

System

Typical piping, using zone-valve zoning

Do not exceed 12 inches apart

Do not exceed 12 inches apart

b

a

c

a

b

c

Optional

Easy-Up Manifolds:

(Seenextpagefordetails)

Partnumber550-100-110/0411


4

Easy-Up Manifold

Ultra-80, -105 . . . . . . . . 1¼” Part number 383-500-649

Ultra-155, -230, -299, -399 . . 1½” Part number 383-500-661

Weil-McLain Easy-Up® ManifoldFactory-built manifolds including near-boiler piping and system secondary connection

Primary (system) RETURN

Connect to DHW RETURN

(if used)

Install LOW WATER CUT-OFF (if used)

Connect to DHW SUPPLY (if used)

Primary (system) SUPPLY

FLANGES for boiler circulator

(factory-supplied)

SHUT-OFF VALVES

CHECK VALVE

Connect to BOILER RETURN

Bushings supplied with Easy-Up Manifold for

Ultra-299 and Ultra-399

2” x 1½” reducers supplied with Easy-Up Manifold for

Ultra-299 and Ultra-399

Connect to BOILER SUPPLY

Connect to RELIEF VALVE

FollowallinstructionsintheEasy-UpManifoldInstructionssuppliedwiththekit.Failuretofollowinstructionscouldresultinseverepersonalinjury,deathorsubstantialpropertydamage.

Toensurepropersystemoperation,installsystem headerssizedtotheguidelinesatright:

Ultra-80 . . . . . . . . . .1” or largerUltra-105, -155 . . . . . .1¼” or largerUltra-230 . . . . . . . . .1½” or largerUltra-299, -399 . . . . . .2” or larger

Partnumber550-100-110/0411 5


U-Control Screens

See individual application instructions for required and optional control settings using the BOILER SETTINGS and SYSTEMSETTINGSmenus.SeeAppendicesforadditionalmenudetails.

ALERT screen

BLUE screen

DHW mode screen

Screen is gray during STANDBY . Blue screen occurs during HEATING mode or when any button is pressed during standby .

Partnumber550-100-110/0411


6

U-Control menu accessBOILER SETTINGS | SYSTEM SETTINGS

See individual application instructions for required and optional control settings using the BOILER SETTINGS and SYSTEMSETTINGSmenus.SeeAppendicesforadditionalmenudetails.

Partnumber550-100-110/0411 7


Purpose• Spaceheatingwithfinnedtubeorcastironbaseboard,plusDHW

suppliedbyasingleboiler.• DHWpriority—spaceheatingisdisabledduringcallforheat

fromwaterheater.

U-Control settings• Seethetableatrightforrequiredandoptionalsettings.• ToseethenavigationsequencetoaccesstheBOILERSETTINGS

andSYSTEMSETTINGSmenus,seepage7.• SelectDHWDIRECTfortheDHWBOILERPRIORITY1.This

informs thecontrol that theDHWtank isdirectlyconnectedtotheboiler.

Circulators and piping• Piping must be primary/secondary as shown, with the boiler

piped in a secondary loop and the DHW piped to the boilerloop.

DHW• DHWcirculatormustbeselectedtohandlethepressuredrop

throughtheUltraboiler,waterheaterandpiping—seeboilermanualforrecommendedsizing.DHWcirculatorsuppliedbyinstaller.

• Forsomelargeindirectwaterheaters,therequiredflowratemayrequirepipingthewaterheaterdifferently—seeboilermanualandotherapplicationsinthisguide.

• U-Control is set for DHW priority — space heating will bediscontinuedduringacallforDHW.

BASEBOARD system• Sizeforrequiredflow.• Systemcirculatorsuppliedbyinstaller.• Singlezoneonly(seeotherapplicationsinthisguideforzon-

ing)• Pipingcanbeone-pipeortwo-pipe(providebalancingvalves

ifneeded).• U-Control is set for DHW priority — space heating will be

discontinuedduringacallforDHW.

BOILER• Circulatorshippedloosewithboiler.• Boiler loop piping can be provided using optional Easy-Up

Manifolds,availablefromWeil-McLain(seepage5).

Wiring• Connectfieldwiringasshownonnextpage.• Thisapplicationappliesonlytosingle-zonespaceheating—see

otherapplicationsinthisguideformultiple-zonesystems.• For circulators connected to the U-Control, the maximum

circulatorloadis2.2ampseach—ifloadishigher,provideacirculatorrelayorcontactorforcirculatorpower.

Application 1Single-zone BASEBOARD | DHW (Direct-connected)

U-Control settings (see navigation flow below)

xxx

D— value must be set (or verified) as indicated

— default acceptable; change only if desired

BOILER SETTINGS

BOILER MODEL Verify model number is correct

HIGH ALTITUDE Set to YES if high altitude

HIGH LIMIT D

WWSD TEMP Default (70 °f) or as requireD

ADjUST OUTDOOR Default (0 °f) or as requireD

ADD’L HEAT DEMAND TYPE D

ADD’L HEAT DEMAND TIME D

SYSTEM SETTINGS

BOILER PRIORITY 1

DHW

SYSTEM TYPE Select from list DHW DIRECT

TEMPERATURES

Max Supply

Max OD ResetMin OD ResetModulate On DiffModulate Off Diff

190 F

DDDD

TIMES

Max On Time

Boost IntervalPrepump Time: Postpump Time:

D

DDD

CIRCULATORSCirculator 1Circulator 2Circulator 3

ONOFFOFF

MAXIMUM RATE DMINIMUM RATE D

BOILER PRIORITY 2

Baseboard (Finned tube or cast iron)

SYSTEM TYPE Select from list FTB or CIB

TEMPERATURES

Max SupplyMin SupplyMax OD ResetMin OD ResetModulate On DiffModulate Off Diff

180 FD

D (70F) or as req’dD (0F) or as req’d

DD

TIMES

Max On TimeMin On TimeBoost IntervalPrepump Time: Postpump Time:

DDDDD


OFFONON


BOILER PRIORITY 3

Not used

SYSTEM TYPE Select from list D

TEMPERATURES


DDDDDD

TIMESMin On TimeBoost IntervalPrepump Time: Postpump Time:

DDDD


DDD


CIRCULATOR EXERCISINGCirculator 1Circulator 2Circulator 3

DDD

FREEZE PROTECT CIRCSCirculator 1Circulator 2Circulator 3

DDD

Partnumber550-100-110/0411


8

*=Supplied by installer

1 DHWcirculator*

2 BOILERcirculator(shippedloosewithboiler)

3 SYSTEMcirculator*

4 120VACpowersupply,15-ampminimumrating

5 U-Control

6 Housethermostat*

7 Supplytemperaturesensor—straptosupplyline

8 Returntemperaturesensor—straptoreturnline

9 DHWtankaquastat*

10 Outdoortemperaturesensor(suppliedwithboiler;installifU-Controlwill

besetforoutdoorresetoperation)

11 Lowwatercutoff(ifused)*

21 Ultraboiler

22 Indirectwaterheater*

23 Flow/checkvalves*

24 Airseparatorwithautomaticairvent*

25 Diaphragm-typeexpansiontank*

26 Freshwatersupply—installperapplicablecodes*

27 Isolationvalves*

28 Purge/drainvalves*

29 Secondarypipingconnectionforboilerloop*

30 Boilerreliefvalve(installperboilermanual)

MINIMUMBoiler loop pipe size

Ultra-80, 105Ultra-155, 230Ultra-299, 399

1”1¼”1½”

Partnumber550-100-110/0411 9


Application 2Single-zone FAN COIL(S) | DHW (Direct-connected)

Purpose• Spaceheatingwithfancoil(s)andDHWsuppliedbyasingle

boiler.• DHWpriority—spaceheatingisdisabledduringcallforheat

fromwaterheater.










FAN COIL system• Sizeforrequiredflow.• Systemcirculatorsuppliedbyinstaller.• Singlezoneonly(seeotherapplicationsinthisguideforzon-




BOILER• Seeboilermanualforsizing.• Circulatorshippedloosewithboiler.• Boiler loop piping can be provided using optional Easy-Up






xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONOFFOFF


BOILER PRIORITY 2

Fan coils

SYSTEM TYPE Select from list FCL

TEMPERATURES


190 FD


DD

TIMES


DDDDD


OFFONON


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


10


1 DHWcirculator*


3 SYSTEMcirculator*


5 U-Control

6 Housethermostat*



9 DHWtankaquastat*




21 Ultraboiler






27 Isolationvalves*






1”1¼”1½”

Partnumber550-100-110/0411 11


Application 3Single-zone CAST IRON RADIATORS | DHW (Direct-connected)

Purpose• SpaceheatingwithcastironradiatorsandDHWsuppliedbya

singleboiler.• DHWpriority—spaceheatingisdisabledduringcallforheat

fromwaterheater.










RADIATOR system• Sizeforrequiredflow.• Systemcirculatorsuppliedbyinstaller.• Singlezoneonly(seeotherapplicationsinthisguideforzon-










xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONOFFOFF


BOILER PRIORITY 2

Radiators

SYSTEM TYPE Select from list CIR

TEMPERATURES


180 FD


DD

TIMES


DDDDD


OFFONON


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


12


1 DHWcirculator*


3 SYSTEMcirculator*


5 U-Control

6 Housethermostat*



9 DHWtankaquastat*




21 Ultraboiler






27 Isolationvalves*






1”1¼”1½”

Partnumber550-100-110/0411 13


Purpose• Spaceheatingwithmultiplezones.Thissystemisapplicableto

anyterminalunittype,includingradiant.• Zoningwithcirculators.• DHWpipedasaseparatezone.• DHWpriority—spaceheatingisdisabledduringcallforheat

fromwaterheater.


andSYSTEMSETTINGSmenus,seepage7.• SelectDHWSYSTEMfortheDHWBOILERPRIORITY1.This

informsthecontrolthattheDHWtankisasystemzone,notdirectlyconnectedtotheboiler.

Circulators and piping• Pipingmustbeprimary/secondaryasshown.

DHW• DHWcirculatormustbesizedforrequiredflowandheadloss.• DHWcirculatorsuppliedbyinstaller.• U-Control is set for DHW priority — space heating will be


SPACE HEATING• Mutliplezones• Sizecirculatorsforrequiredflow.• Spaceheatingcirculatorssuppliedbyinstaller.• CirculatorscontrolledbyWeil-McLainWMCRcontroller.



Wiring• Connectfieldwiringasshownonnextpage.• This application applies only to multiple-zone space heating,

usingWeil-McLainzonecontroller.• For circulators connected to the U-Control, the maximum


Application 4Multi-zone SPACE HEATING (Circulators + WMCR) | DHW (As zone in system)


xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW

SYSTEM TYPE Select from list DHW SYSTEM

TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONONOFF


BOILER PRIORITY 2

Space heating (any type)

SYSTEM TYPE Select from list Select type used

TEMPERATURES


As req’dD


DD

TIMES


DDDDD


OFFONOFF


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


14


1 DHWcirculator*



5 U-Control

6 Spaceheatingzonethermostats*



9 DHWtankaquastat*

10 Outdoortemperaturesensor


12 Circulatorzonecontroller,Weil-McLainWMCR—selectfornumberof

zonesrequired*

16 Spaceheatingzonecirculators*

22 Indirectwaterheater•





27 Isolationvalves*






1”1¼”1½”

Partnumber550-100-110/0411 15


Application 5Multi-zone RADIANT | DHW (Direct-connected) | HEAT EXCHANGER (WMBP or WMPH) (<30% of total heat loss)

Purpose• Spaceheatingwithmultipleradiantzones(zonevalvezoning).• Heatexchanger,brazedplate(WMBP)orpoolheater(WMPH)

inseparatezone.Heatingloadmustbelessthan30%oftotalheatloss.Alternatively,seeApplication7a,whichdoesnotlimitloadsizes.

• DHWpipeddirectlytotheboiler.• DHWpriority—spaceheatingandheatexchangerheatingare

disabledduringcallforheatfromwaterheater.

U-Control setting notes• Seethetableatrightforrequiredandoptionalsettings.• ToseethenavigationsequencetoaccesstheBOILERSETTINGS



• SelectSYSTEMTYPEDHWforBOILERPRIORITY3,theheatexchangercircuit.Thispreventsoutdoorresetregulationofsup-plytemperatureduringheatexchangeroperation.


DHW• DHWcirculatormustbe selected tohandle thepressuredrop

throughtheUltraboiler,waterheaterandpiping—seeboilerman-ualforrecommendedsizing.DHWcirculatorsuppliedbyinstaller.



RADIANT• Sizecirculatorsforrequiredflow.• Radiantcirculatorssuppliedbyinstaller.

SeeApplication 7a,page22,forradiantheat-ingusingindependenttemperaturecontrolfortheradiantzone.

HEAT EXCHANGER• Heatexchangerloadmustbelessthan30%oftotalheatloss.• Sizecirculatorforrequiredflow.• Typical application shown usingWeil-McLain brazed plate

(WMBP)exchangerorpoolheater(WMBP).• Heatexchangerandcirculatorsuppliedbyinstaller.



Wiring• Connectfieldwiringasshownonnextpage.• For circulators connected to the U-Control, the maximum


• ProvideWMR-21relaytooperateheatexchangercirculatorandprovidecallforheatexchangerheatingtoU-Controlinput.


xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONOFFOFF


BOILER PRIORITY 2

Radiant zones Note 1 — Select system type: RSG = Slab on grade RTS = Thin slab RSU = Below floor RAF = Above floor

SYSTEM TYPE Select from list Note 1 (at left)

TEMPERATURES


As requiredD


DD

TIMES


DDDDD


OFFONON


BOILER PRIORITY 3

Heat exchanger (<30% of total heat loss)


TEMPERATURES


190 FDDDDD


DDDD


OFFONOFF



DDD


DDD

Partnumber550-100-110/0411


16


1 DHWcirculator*


3 Radiantcirculator*


5 U-Control

6 Radiantzoneendswitches*



9 DHWtankaquastat*

10 Outdoortemperaturesensor(suppliedwithboiler;installifU-Controlwillbesetforoutdoorresetoperation)


12 Heatexchanger

14 Heatexchangeraquastatorcontroller

15 WMR-21,2-polerelayforheatexchangercirculatoroperation*

16 Heatexchangercirculator*

21 Ultraboiler






27 Isolationvalves*




34 Zonevalves

35 By-passpressureregulator



1”1¼”1½”

Partnumber550-100-110/0411 17


Application 6

Purpose• Radiant heating circuit with single or multiple zones (zone

valves).Multiple-zonewiringnotshown—mustbeprovidedusingazonecontrollerorconnectingzonevalveendswitches.

• Single-zonebaseboardheatingforasmallspace(heatingloadlessthan30%oftotalheatloss—alternatively,seeApplication7a,whichdoesnotlimitloadsizes).

• DHWpipeddirectlytotheboiler.• DHWpriority—spaceheatingandheaterexchangerheatingare










RADIANT• Sizecirculatorsforrequiredflow.• Radiantcirculatorssuppliedbyinstaller.

SeeApplication 7a,page22,forradiantheat-ingusingindependenttemperaturecontrolfortheradiantzone.

BASEBOARD• Baseboardloadmustbelessthan30%oftotalheatloss.• Sizecirculatorforrequiredflow.• Baseboardcirculatorsuppliedbyinstaller.





• ProvideWMR-21 relay to operate baseboard circulator andprovidecallforbaseboardheatingtoU-Controlinput.

• Ifusingmultiplezones,providecomponentsandwiringneededto operate zone components and provide call for heat to theU-controlinput.


xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONOFFOFF


BOILER PRIORITY 2

Radiant

Note 1 — Select system type: RSG = Slab on grade RTS = Thin slab RSU = Below floor RAF = Above floor


TEMPERATURES


As requiredD


DD

TIMES


DDDDD


OFFONON


BOILER PRIORITY 3

Baseboard (Finned tube or cast iron)(<30% of total heat loss)


TEMPERATURES


180 FD


DD


DDDD


OFFONOFF



DDD


DDD

Multi-zone RADIANT | DHW (Direct-connected) | Small BASEBOARD zone (<30% of total heat loss)

Partnumber550-100-110/0411


18


1 DHWcirculator*


3 Radiantcirculator*


5 U-Control

6 Radiantzoneendswitches*



9 DHWtankaquastat*



14 Baseboardthermostat*

15 Weil-McLainWMR-21two-polerelaytooperatebaseboardcirculator*

16 Baseboardcirculator*

21 Ultraboiler






27 Isolationvalves*




34 Zonevalves*

35 Bypasspressureregulator*



1”1¼”1½”

Partnumber550-100-110/0411 19


Application 7Multiple HI-TEMP HEATING zones | DHW (Direct-connected) | Small RADIANT zone (<30 of total heat loss)


xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW

SYSTEM TYPE Select from list DHW Direct

TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONOFFOFF


BOILER PRIORITY 2

Hi-temp space htg .

Note 1 — Select system type: FCL = Fan coil FTB = Finned-tube bb CIB = Cast iron bb CIR = Cast iron rad. Use DHW SYSTEM for heat exchangers


TEMPERATURES


As requiredD


DD


DDDDD


OFFONOFF


BOILER PRIORITY 3

Radiant (<30 of total heat loss)



TEMPERATURES


As requiredD


DD

TIMES


DDDDD


OFFONON



DDD


DDD

Purpose• Radiantheatingandhi-temp(180°Ftypical)spaceheatingwith

single or multiple zones (circulator zoning). Hi-temp spaceheatingterminalunitscanbebaseboard,fancoil,radiatorsorheat exchangers. Fan coils must be equipped with minimumtemp aquastats, because their circulators can operate duringradiant circuit operation (supply water temperature could betoolowforfancoils).











HI-TEMP SPACE HEATING• Multiple zones with circulators controlled byWeil-McLain

WMCRzonecontroller.• Sizecirculatorsforrequiredflow.• Spaceheatingzonecirculatorssuppliedbyinstaller.

RADIANT• Radiantloadmustbelessthan30%oftotalheatloss.

SeeApplication 7a,page22,forradiantheat-ingusingindependenttemperaturecontrolfortheradiantzone,withnolimittotheradiantload.

• Sizecirculatorforrequiredflow.• Radiantcirculatorsuppliedbyinstaller.





• Provide Weil-McLain WMCR circulator zone controller tocontrol all hi-temp zone circulators, sized for the number ofzonesrequired.

Partnumber550-100-110/0411


20


1 DHWcirculator*


3 Radiantzonecirculator*


5 U-Control

6 Hi-tempzonethermostat*



9 DHWtankaquastat*



14 Radiantzonethermostat*

15 Weil-McLainWMCRcirculatorzonecontroller(selectfornumberofzonesrequired)*

16 Hi-tempzonecirculator*

21 Ultraboiler






27 Isolationvalves*






1”1¼”1½”

Partnumber550-100-110/0411 21


Application 7a


xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONOFFOFF


BOILER PRIORITY 2

Space heating — select type most typical of hi-temp terminal units and highest supply temp required

SYSTEM TYPE Select from list Select

TEMPERATURES


As requiredD


DD


DDDDD


OFFONOFF


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Multi-zone HI-TEMP HEATING plus RADIANT (with mixing valve) | DHW (Direct-connected)(No limits on the relative heating loads of radiant or hi-temp space heating circuits)

Purpose• Radiantheatingandhi-temp(180°Ftypical)spaceheatingwith

single or multiple zones (circulator zoning). Hi-temp spaceheatingterminalunitscanbebaseboard,fancoil,radiatorsorheatexchangers.

• Supply water temperature is selected for the hi-temp zones.The mixing valve regulates supply temperature to the lower-temperatureradiantzones.

• Allcirculators(hitempandradiant)areoperatedbytheWeil-McLainWMCRcirculatorzonecontroller.

• DHWpipeddirectlytotheboiler.• DHWpriority—spaceheatingisdisabledduringcallforheat

fromwaterheater.









HI-TEMP SPACE HEATING• Multiple zones with circulators controlled byWeil-McLain

WMCRzonecontroller.• Sizecirculatorsforrequiredflow.• All space heating circulators (hi-temp and radiant) supplied

byinstaller.





• Provide Weil-McLain WMCR circulator zone controller tocontrolallspaceheatingzonecirculators(hi-tempandradiant),sizedforthenumberofzonesrequired.

Partnumber550-100-110/0411


22


1 DHWcirculator*



5 U-Control

6 Hi-tempzonethermostats*



9 DHWtankaquastat*



15 Weil-McLainWMCRcirculatorzonecontroller*

16 Radiantzonecirculators*

17 Hi-tempzonecirculators*


21 Ultraboiler






27 Isolationvalves*




40 Mixingvalve—controlssupplytemperaturetoradiantzones*

41 Checkvalve*



1”1¼”1½”

Partnumber550-100-110/0411 23


Application 8Multi-zone BASEBOARD (Zone valves + WMZV controller) | DHW (Direct-connected)

Purpose• Spaceheatingwithmultiplebaseboardzones.• Zoningwithzonevalves.• DHWpipeddirectlytotheboiler.• DHWpriority—spaceheatingandheaterexchangerheatingare










BASEBOARD• Sizeforrequiredflow.• Systemcirculatorsuppliedbyinstaller.• Multiplezones(withzonevalvesandbypasspressureregulator

byinstaller).






• ProvideWeil-McLainWMZVzonevalvecontroller.


xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONOFFOFF


BOILER PRIORITY 2



TEMPERATURES


180 FD


DD

TIMES


DDDDD


OFFONON


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


24


1 DHWcirculator*


3 SYSTEMcirculator*


5 U-Control

6 Baseboardzonethermostats*



9 DHWtankaquastat*



21 Ultraboiler






27 Isolationvalves*




34 Zonevalves*


36 Weil-McLainWMZVzonevalvecontroller*



1”1¼”1½”

Partnumber550-100-110/0411 25


Application 9Multi-zone BASEBOARD (Circulators + WMCR controller) | DHW (Direct-connected)

Purpose• Spaceheatingwithmultiplebaseboardzones.• Zoningwithcirculators.• DHWpipeddirectlytotheboiler.• DHWpriority—spaceheatingandheaterexchangerheatingare










BASEBOARD• Sizeforrequiredflow.• Baseboardzonecirculatorssuppliedbyinstaller.• Multiplezones.






• ProvideWeil-McLainWMCRcirculatorzonecontroller.


xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONOFFOFF


BOILER PRIORITY 2



TEMPERATURES


180 FD


DD

TIMES


DDDDD


OFFONOFF


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


26


1 DHWcirculator*



5 U-Control

6 Baseboardzonethermostats*



9 DHWtankaquastat*




16 Baseboarezonecirculators*

21 Ultraboiler






27 Isolationvalves*






1”1¼”1½”

Partnumber550-100-110/0411 27


Application 10Multi-zone FAN COILS (Circs . + WMCR contr .) | DHW (Direct-connected) | Small RADIANT zone (<30% of total heat loss)

Purpose• Spaceheatingwithmultiplefancoilzones,circulatorzoning.• Singleradiantzoneforsmallspace(heatingloadlessthan30%ofto-

talheatloss—alternatively,seeApplication7a,whichdoesnotlimitloadsizes).Fancoilzonesaredisabledduringradiantcallforheat.




andSYSTEMSETTINGSmenus,seepage7.

• SelectDHWDIRECTfortheDHWBOILERPRIORITY1.Thisin-formsthecontrolthattheDHWtankisdirectlyconnectedtotheboiler.


DHW• DHWcirculatormustbe selected tohandle thepressuredrop

throughtheUltraboiler,waterheaterandpiping—seeboilerman-ualforrecommendedsizing.DHWcirculatorsuppliedbyinstaller.



FAN COIL• Multiple zones with circulators controlled byWeil-McLain

WMCRzonecontroller.• Sizecirculatorsforrequiredflow.Fancoilcirculatorssupplied

byinstaller.

RADIANT• Radiantloadmustbelessthan30%oftotalheatloss.• Size circulator for required flow. Radiant circulator supplied

byinstaller.

SeeApplication 7a,page22,forradiantheatingusing independenttemperaturecontrol fortheradiantzone,withnolimittotheradiantload.






• ProvideWeil-McLainWMCRcirculatorzonecontrollertocon-trolfancoilzonecirculators.

• Provideasingle-polenormally-closedcontactrelay,120VACcoil,todisablefancoilzonesduringradiantcallforheat.

Thesingle-polerelaycanbeomittedifthefancoilunitsareequippedwithminimumtemperatureaquastats.


xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONOFFOFF


BOILER PRIORITY 2

Fan coil zones


TEMPERATURES


190 FD


DD

TIMES


DDDDD


OFFONOFF


BOILER PRIORITY 3

Radiant zone <30% of total heat loss



TEMPERATURES


As requiredD


DD


DDDDD


OFFONON



DDD


DDD

Partnumber550-100-110/0411


28


1 DHWcirculator*




5 U-Control

6 Fancoilzonethermostats*



9 DHWtankaquastat*




13 SPSTrelaywith120VACcoil*


16 Fancoilzonecirculators*

21 Ultraboiler






27 Isolationvalves*






1”1¼”1½”

Partnumber550-100-110/0411 29


Application 11CAST IRON RADIATORS | DHW (Direct-connected) | Small RADIANT zone (<30% of total heat loss)

Purpose• Singlecastironradiatorzone.• Singleradiantzoneforsmallspace(heatingloadlessthan30%

oftotalheatloss—alternatively,seeApplication7a,whichdoesnot limit loadsizes).Radiatorzoneisdisabledduringradiantcallforheat.


fromwaterheater.









RADIATORS• Sizecirculatorforrequiredflow.• Radiatorzonecirculatorsuppliedbyinstaller.



• Size circulator for required flow. Radiant circulator suppliedbyinstaller.





• ProvideWMR-21 relay to operate radiator circulator(s) andprovidecallforradiatorzoneheatingtoU-Controlinput.

• Ifusingmultiplezones,providecomponentsandwiringneededto operate zone components and provide call for heat to theU-controlinput.


xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONOFFOFF


BOILER PRIORITY 2

Radiator zone

SYSTEM TYPE Select from list CIR

TEMPERATURES


180 FD


DD

TIMES


DDDDD


OFFONOFF


BOILER PRIORITY 3

Radiant zone <30% of total heat loss



TEMPERATURES


As requiredD


DD


DDDDD


OFFONON



DDD


DDD

Partnumber550-100-110/0411


30


1 DHWcirculator*


3 Radiantcircuitcirculator*


5 U-Control

6 Radiatorzonethermostat*



9 DHWtankaquastat*



14 Radiantthermostat*

15 Weil-McLainWMR-21relay*

16 Radiatorzonecirculator*

21 Ultraboiler






27 Isolationvalves*






1”1¼”1½”

Partnumber550-100-110/0411 31


Application 12FAN COIL zone | BASEBOARD zone | Small RADIANT zone (<30% of total heat loss)

Purpose• Spaceheatingwitha singlezoneofbaseboard, singlezoneof

radiantandsinglezoneoffancoil.• Theradiantloadmustbenomorethan30%ofthetotalheating

loadtousethecontrolstrategyofthisapplication.Alternatively,seeApplication7a,whichdoesnotlimitloadsizes.

• Zoningwithcirculators.




FAN COIL• Sizecirculatorforrequiredflow.• Fancoilcirculatorsuppliedbyinstaller.

BASEBOARD• Sizecirculatorforrequiredflow.• Baseboardcirculatorsuppliedbyinstaller.



• Size circulator for required flow. Radiant circulator suppliedbyinstaller.





• ProvideWMR-21 relay to operate baseboard circulator andprovidecallforheattoU-Control.


xxx



BOILER SETTINGS



HIGH LIMIT D



ADD’L HEAT DEMAND TYPE type 1

ADD’L HEAT DEMAND TIME Default (0 minutes)

SYSTEM SETTINGS

BOILER PRIORITY 1

Fan coil zone


TEMPERATURES


190 FD

DefaultDefault

DD

TIMES

Max On Time


D (30 minutes)

DDD


ONONOFF


BOILER PRIORITY 2



TEMPERATURES


180 FD

DefaultDefault

DD

TIMES


D (30 minutes)DDDD


OFFONOFF


BOILER PRIORITY 3

Radiant zone <30% of total heat loss Note 1 — Select system type: RSG = Slab on grade RTS = Thin slab RSU = Below floor RAF = Above floor


TEMPERATURES


As requiredD

DefaultDefault

DD


DDDDD


OFFONON



DDD


DDD

Partnumber550-100-110/0411


32


1 Fancoilzonecirculator*




5 U-Control

6 Baseboardzonethermostat*



9 Fancoilzonethermostat*



14 Radiantthermosatat*


16 Baseboardzonecirculator*

21 Ultraboiler





27 Isolationvalves*






1”1¼”1½”

Partnumber550-100-110/0411 33


Application 13Single-zone BASEBOARD | DHW (System, as zone)

Purpose• Spaceheatingwithsinglezoneofbaseboard(finnedtubeorcast

iron).ThisapplicationcanbeadaptedformultiplebaseboardzonesifpipingcomponentsandcontrolsareaddedtocontrolthezonecirculatorsorzonevalvesandprovideacallforheatsignaltotheU-Control.

• DHWpipedasaseparatezone.• DHWpriority—spaceheatingisdisabledduringcallforheat

fromwaterheater.


andSYSTEMSETTINGSmenus,seepage7.• SelectDHWSYSTEMfortheDHWBOILERPRIORITY1.This

informsthecontrolthattheDHWtankisasystemzone,notdirectlyconnectedtotheboiler.


DHW• DHWcirculatormustbesizedforrequiredflowandheadloss.• DHWcirculatorsuppliedbyinstaller.• U-Control is set for DHW priority — space heating will be


BASEBOARD• Singlezone.Multiplezonescanbeusedifzonecontrollerand

pipingcomponentsareadded.• Sizecirculatorforrequiredflow.• Baseboardcirculatorsuppliedbyinstaller.





• Ifusingmultiplezonesofbaseboard,providecomponentsandwiringneededtooperatezonecomponentsandprovidecallforheattotheU-controlinput.


xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONONOFF


BOILER PRIORITY 2



TEMPERATURES


180 FD


DD

TIMES


DDDDD


OFFONON


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


34


1 DHWcirculator*2 BOILERcirculator(shippedloosewithboiler)

3 Baseboardcirculator*4 120VACpowersupply,15-ampminimumrating

5 U-Control

6 Baseboardthermostat*7 Supplytemperaturesensor—straptosupplyline


9 DHWtankaquastat*10 Outdoortemperaturesensor(suppliedwithboiler;install

ifU-Controlwillbesetforoutdoorresetoperation)

11 Lowwatercutoff(ifused)*21 Ultraboiler

22 Indirectwaterheater*23 Flow/checkvalves*24 Airseparatorwithautomaticairvent*25 Diaphragm-typeexpansiontank*26 Freshwatersupply—installperapplicablecodes*27 Isolationvalves*28 Purge/drainvalves*29 Secondarypipingconnectionforboilerloop*30 Boilerreliefvalve(installperboilermanual)



1”1¼”1½”

Partnumber550-100-110/0411 35


Application 14Multi-zone BASEBOARD (Zone valves) | Multi-zone RADIANT (Zone valves) | DHW (Direct-connected)

(Radiant load must be <30% of total heat loss)

Purpose• Space heating with multiple baseboard (finned tube or cast

iron)zonesandmultipleradiantzones,zoningwithzonevalves.• Theradiantloadmustbenomorethan30%ofthetotalheating

loadtousethecontrolstrategyofthisapplication.Alternatively,seeApplication7a,whichdoesnotlimitloadsizes.


fromwaterheater.









BASEBOARD• Multiplezonesusingzonevalves.• Sizecirculatorforrequiredflow.• Baseboardcirculatorandzonevalvessuppliedbyinstaller.

RADIANT• Multiplezonesusingzonevalves.Radiantloadmustbelessthan

30%oftotalheatloss.


• Size circulator for required flow. Radiant circulator and zonevalvessuppliedbyinstaller.



Wiring• Connectfieldwiringasshownonnextpage.• Zone valve end switches and DHW aquastat activate the

U-Control.TheU-Control activates thecirculators forDHWandradiantcircuits.

• This application applies only to multiple-zone space heating,usingWeil-McLainzonecontroller.

• For circulators connected to the U-Control, the maximumcirculatorloadis2.2ampseach—ifloadishigher,provideacirculatorrelayorcontactorforcirculatorpower.

• Provide aWeil-McLainWMR-21 relay to operate baseboardcirculator.


xxx



BOILER SETTINGS



HIGH LIMIT D



ADD’L HEAT DEMAND TYPE Type 1


SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D (30 minutes)

DDD


ONOFFOFF


BOILER PRIORITY 2



TEMPERATURES


180 FD


DD

TIMES


D (30 minutes)DDDD


OFFONOFF


BOILER PRIORITY 3

Radiant zones Note 1 — Select system type: RSG = Slab on grade RTS = Thin slab RSU = Below floor RAF = Above floor


TEMPERATURES


As requiredD


DD


DDDDD


OFFONON



DDD


DDD

Partnumber550-100-110/0411


36


1 DHWcirculator*


3 Radiantcircuitcirculator*


5 U-Control

6 Baseboardzonevalveendswitches*



9 DHWtankaquastat*



14 Radiantzonevalveendswitches*


16 Baseboardcircuitcirculator*

21 Ultraboiler






27 Isolationvalves*




34 Zonevalves*




1”1¼”1½”

Partnumber550-100-110/0411 37


Application 15Single-zone BASEBOARD | Single-zone RADIANT | POOL Heat exchanger

(Radiant load must be <30% of total heat loss)

Purpose• Singlezoneofradiant,singlezoneofbaseboard(finnedtubeor

castiron)andsinglezoneforpoolheatexchanger.Thisapplica-tioncanbeadaptedformultiplezonesifpipingcomponentsandcontrolsareaddedtocontrolthezonecirculatorsorzonevalvesandprovideacallforheatsignaltotheU-Control.

• Zoningwithcirculators.

U-Control setting notes• SystemtypeDHWSYSTEMisusedforBOILERPRIORITY3,

theWMPHzone.Thispreventsoutdoorresetregulationofthesupplywatertemperaturetothepoolheater.


BASEBOARD• Singlezone.Multiplezonescanbeusedifzonecontrollerand

pipingcomponentsareadded.• Sizecirculatorsforrequiredflow.• Baseboardcirculatorssuppliedbyinstaller.

RADIANT• Singlezone.Multiplezonescanbeusedifzonecontrollerand

pipingcomponentsareadded.


• Sizecirculatorsforrequiredflow.Radiantcirculatorssuppliedbyinstaller.

HEAT EXCHANGER• Sizecirculatorforrequiredflow.• Typical application shown usingWeil-McLain pool heat ex-

changer(WMBP).• Heatexchangerandcirculatorsuppliedbyinstaller.





• ProvideaWeil-McLainWMR-21relaytooperateboilercircula-tor.


xxx



BOILER SETTINGS



HIGH LIMIT D



ADD’L HEAT DEMAND TYPE Type 1


SYSTEM SETTINGS

BOILER PRIORITY 1



TEMPERATURES


180 FD


DD

TIMES

Max On Time


D

DDD


ONONOFF


BOILER PRIORITY 2

Radiant zone Note 1 — Select system type: RSG = Slab on grade RTS = Thin slab RSU = Below floor RAF = Above floor


TEMPERATURES


As requiredD


DD

TIMES


DDDDD


OFFONOFF


BOILER PRIORITY 3

WMPH zone


TEMPERATURES


190 FDDDDD


DDDDD


OFFONON



DDD


DDD

Partnumber550-100-110/0411


38


1 BASEBOARDcirculator*


3 POOLHEATEXCHANGERcirculator*


5 U-Control

6 Baseboardzonethermostat*







16 RADIANTcirculator*

18 Poolheateraquastat*

21 Ultraboiler





27 Isolationvalves*






1”1¼”1½”

Partnumber550-100-110/0411 39


Application 16Single or Multi-zone SPACE HEATING | DHW (Direct-connected) | ISOLATION Heat exchanger (Tall buildings)

(Use where space heating system operating pressure is over 25 PSIG)

Purpose• Isolationheatexchangerforapplicationswithhighsystempres-

sure(over25PSIG),suchastallbuildings.TypicalapplicationshownusingWeil-McLainWMBPbrazed-plateexchanger.

• Spaceheatingviahotwaterfeedtobuildingterminalunits.• Spaceheatingcirculatorandheatexchangerprimarycirculator

areactivatedoncallforheatbytheheatingsystem.• DHWpipeddirectlytotheboiler.• DHWpriority—spaceheatingandheaterexchangerheatingare










HEAT EXCHANGER• Sizecirculatorforrequiredflowandpressuredrop.• Heatexchanger,pipingcomponentsandcirculatorsuppliedby

installer (except the boiler circulator, shipped loose with theboiler).

SPACE HEATING• Sizecirculatorforrequiredflowandpressuredrop.• Terminalunits,pipingcomponentsandcirculatorsuppliedby

installer.



Wiring• Connectfieldwiringasshownonnextpage.• ProvideWeil-McLainWMR-21relay tooperate spaceheating

circulator.• For circulators connected to the U-Control, the maximum


• DONOTconnecttheoutdoorsensortotheU-Controlunlessthewatersupplytotheheatexchangeristoberesetbasedonoutdoortemperature.


xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONOFFOFF


BOILER PRIORITY 2

Heat exchanger

SYSTEM TYPE Select from list CUS

TEMPERATURES


190 F190 F

DDDD

TIMES


DDDDD


OFFONON


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


40


1 DHWcirculator*


3 HEATEXCHANGERPRIMARYcirculator*


5 U-Control



9 DHWtankaquastat*



14 Spaceheatingthermostatorcallforheatcontact*


16 SPACEHEATINGcirculator*

21 Ultraboiler






27 Isolationvalves*



30 Reliefvalves—boiler(installperboilermanual)andheatexchangerspaceheatingside



1”1¼”1½”

Partnumber550-100-110/0411 41


Multiple boiler operation optionsUsing the U-Control settings

ADDITIONAL HEAT DEMAND

BOILER SETTINGS

BOILER MODEL

HIGH ALTITUDE

HIGH LIMIT

WWSD TEMP

ADjUST OUTDOOR

ADD’L HEAT DEMAND TYPE

ADD’L HEAT DEMAND TIME

1. TheADD’LHEATDEMANDsettings(thetworedboxesabove)areformultipleboilersormultipleheatingsources(anUltraboilercollaboratingwithaheatpumporadifferentboiler,forexamples).

Additional heat demand DOES NOT PASS ON if thesystemtypeisDHWDirectorCustom.Donotusethissetting on any boiler unless it is the last in the lead/shadowsequence.

ADDITIONAL HEAT DEMAND settings

OFF

1. Functiondisabled—NOsignalwouldbepassedontootherboilers.

Type 1

1. ThismeanstheUltraboileristheprimaryheatsource.

a. WhentheUltraboilerreceivesacallforheat,itbeginsitsstartupsequenceandalsostartsadelay timer(setasADD’LHEATDE-MANDTIME).

b. When theADD’L HEAT DEMAND TIME has elapsed, the U-Control closes the“Additional heat demand contact,” terminalsP16–6&7.

c. UseP16–6&7tostartthenextheatsource.

d. If the next heat source is an Ultra boiler, connect from the firstboiler’sP16–6&7terminalstothesecondboiler’s“Heatdemand1”terminals(P11–4and5).

e. Program the second boiler’sADD’L HEAT DEMAND TIME tostart a third boiler the same way, and so on to sequentially firemultipleboilers.

Type 2

1. Thismeanstheboileristhesecondaryheatsource.

a. WhentheU-Controlreceivesacallforheat,itimmediatelyactivatesthe“Additionalheatdemandcontact,”terminalsP16–6&7.Thiscontactisusedtostartthenextheatsourceimmediately.

b. WhentheADD’LHEATDEMANDTIMEhaselapsed,theUltraboilerbeginsitsstartupsequenceandcontinuestoheatuntilthedemandissatisfied.

c. Type2assignmentwouldgenerallyonlybeusediftheotherheatsourceisadifferentboileroraheatpump,forexample.

Type 3

1. ThisassignstheboilerastheLEADboilerinamultipleboilersystem.

a. The LEAD boiler must have system supply and return sensorsmountedonthesystemsupplyandreturnpipesandwiredtotheboiler.Anoutdoorsensormustalsobe installed ifoutdoorresetisdesired.

b. WhentheU-Controlreceivesacall forheat, itbeginsitsheatingsequenceandstartstheADD’LHEATDEMANDTIMEdelaytimer.

c. When theADD’L HEAT DEMAND TIME has elapsed, the U-Controlsendsa0–10VDCproportionalsignaloutits0–10VDCoutputterminals,P16–1&2.

d. AdditionalUltraboilersarecalledSHADOWboilers.

e. ConnecttheLEADboileroutputterminals(P16–1&2)tothefirstSHADOWboiler’s0–10VDCinputterminals,P15–5&6.

f. For the LEAD boiler and all additional boilers except the lastSHADOWboiler,connectP16–1&2ofeachboilertoP15–5&6ofthenextboiler.

g. Each SHADOW boiler will start and modulate based on the0–10VDCsignalfromthepreviousboiler.

h. TheSHADOWboilersmustbesetupasType4(seebelow).TheydonotneedtheirADD’LHEATDEMANDTIMEvaluestobeset.

Type 4

1. ThisassignstheboilerasaSHADOWboilerinamultipleboilersystem.

a. ForType4boilers,theADDITIONALHEATDEMANDfunctiononlyappliestothePriority1system.

b. WiretheboilersasexplainedunderType3,above.

c. EachSHADOWboilermusthavesystemsupplyandreturnsensorsmountedonthesystemsupplyandreturnpipesandwiredtotheboiler.Anoutdoorsensormustalsobe installed ifoutdoorresetisdesired.

Partnumber550-100-110/0411


42

Multiple boiler operation options (continued)

Using the U-Control settings

SENSORS1. EachUltraboilerisshippedwiththreeremote-mountedsensors—supply,return

andoutdoor.Supplyandreturnsensorsarestrap-ontype.

a. Supply sensor—Everyboilermusthaveitssupplysensorattachedtothesystemsupplypiping.Itmustsensethetemperatureofthewatergoingtothesystem.(Theboilerhasanintegralsensorthatmonitorsboileroutletwatertemperature.)theLEADboileradjustsfiringrateasneededtomain-tainsystemsupplytemperature.Shadowboilersmodulateaccordingtothe0–10VDCsignal from the leadboiler,but they turn onand offbasedonsystemsupplytemperature.

b. Return sensor—Everyboilermusthaveitssupplysensorattachedtothe system return piping to allow the boiler to monitor temperature risethroughtheboiler.

c. Outdoor sensor—Installanoutdoorsensorforeachboilerifthemultipleboilersystemwilluseoutdoorreset.

Thedescriptionofeachmultipleboilerapplicationinthisguideindicateswhichsensorsarerequiredtoaccomplishtheintentoftheapplication.

ADDITIONAL HEAT DEMAND applications

Type 1 and Type 2 applications

1. Application 17a — Multiple heat sourcesappliesthisoptiontodelayoperationoftheUltraboiler,allowingtimefortheprimaryheatsourcetosatisfythecallforheatfromthethermostat,endswitches,etc.

a. TheUltraboilerissetupasType2.

b. WhentheroomthermostatcallsforheatattheUltraboiler,theU-ControlimmediatelyclosesthecontactacrossP16terminals6and7.

c. Thiscontactisusedtostarttheauxiliaryheatsource(woodstove,etc.)

d. TheU-Controlalso immediatelystarts itsADD’LHEATDEMANDTIMEtimer(setat60minutesforthisapplication).Ifthistimerelapsesandthecallforheatisstillpresent,theUltraboilerwillfire.

e. TheUltraboilerwilloperatetheboilercirculatorandsystemcirculatortoprovideheattothebaseboardunits.

f. ThisapplicationprovidesDHWusingthePriority2functionsoftheUltraboiler.WiththePriority1MAXONTIMEsetto0,theUltraboilerwillim-mediatelyswitchtoDHWoperationonanycallfromtheDHWtank.

2. OtherpossibleapplicationsofType1/Type2—

a. Application 17 — Multiple heat sourcescouldbesetupwiththeUltraboilerspecifiedasType2,withADD’LHEATDEMANDTIMEsetto60minutes,typically.Theaquastat(item14)neartheheatexchangeroutletwouldnotbeusedinthiscase.Thissetupwouldprovide60minutesfortheauxiliaryheatsourcetosatisfydemandbeforetheUltraboilerwouldfireforspaceheating.TheUltraboilerwillalwaysrespondtoacallforheatfromtheDHWtank.

b. Combustion air heater —An Ultra boiler could be set as Type 2, withterminalsP16–1&2usedtostartacombustionairheater.Setthetimedelayto10minutestoallowtimeforcombustionairheatertoreachsteady-stateoperationbeforetheUltraboilerfires.

Type 3 and Type 4 — Sequential operation

1. Sequentialoperationisachievedbysettingatimedelaybe-tweenboilerstart-ups.Thismethodisusedin:

a. Application 18 — Multiple boilersb. Application 19 — Multiple boilersc. Application 20 — Multiple boilers

d. Application 21 — Multiple boilers.

2. UsetheADD’LHEATDEMANDTIMEsettingtodelayac-tivationofeachsuccessiveboilerinamultipleboilersystem.

a. When one of the boilers receives a call for heat, theU-Control starts theADD’L HEAT DEMAND TIMEtimer.Onlywhenthistimerelapsesisthesignaltostartpassedontothenextboiler—that is,afterthis timeelapses,theU-Controlsendsa0–10VDCsignaloutofP16terminals1and2.

b. Typically, set theADD’L HEAT DEMAND TIME to5minutesforallboilersexceptthelastshadowboiler.

c. Wireeachboilerwith itsP16-1&2output terminals(0–10VDC)going to theP15-5&6 terminalsof thenextboiler.

3. Stagingofboilerscanalsobeimprovedbythesettingofeachboiler’sMODULATEONandMODULATEOFFdifferentials,asexplainedbelow.

4. Set the SHADOW boilers’ MODULATE ON DIFF andMODULATEOFFDIFFsettingsatdifferentvaluestocausetheSHADOWboilerstocycleatdifferentsystemSUPPLYtemperatures. This will improve the sequential firing ofSHADOWboilers.

• The applications in this guide use ON/OFF values of5°F/10°FforthefirstSHADOWboilerand10°F/5°FforthelastSHADOWboiler.

• Forsystemswithmorethanthreeboilers,thesevaluescanbegraduatedtoimprovesequencing.Example:forfourboilers,useMODULATEONDIFFvaluesof3/6/9andOFFDIFFvaluesof9/3/6.

Toeffectivelyuseoutdoorreset,allSHADOWboilers must be have OUTDOOR sensorsinstalled if the LEAD boiler is set up foroutdoorresetoperation.TheMAXSUPPLY,MINSUPPLY,MAXODRESETandMINODRESET values must be set exactly as on theLEADboiler.

DO NOT use outdoor sensors and outdoorresetonmultipleboilerssupplyingasystemthat requires fixed high-temperature water,such as DHW applications with the waterheaters piped in the system, not directly tooneoftheboilers.

Themodulatingsignal fromU-ControlP16ofoneboilertoP15ofthenextispolaritysensitive.

Connectwires+to+and–to–asshown.Thatis,P16–1goestoP15–6andP16–2goestoP15–5.

Partnumber550-100-110/0411 43


Application 17 — Multiple heat sourcesALTERNATIVE HEAT SOURCE as primary / ULTRA as back-up | Single-zone BASEBOARD or FAN COIL

DHW (Direct-connected)

Purpose• Themainheatsourceforthissystemisawood-firedboileror

otheralternativeheatsource.TheUltraboilerprovidesback-upheating.Inaddition,theUltraboilerprovidesdomestichotwaterviaanindirectwaterheater.

• Spaceheatingiswithbaseboard,fancoilsorother.Thisapplica-tioncanbeadaptedformultiplezonesifpipingcomponentsandcontrolsareaddedtocontrolthezonecirculatorsorzonevalvesandprovideacallforheatsignaltotheU-Control.

• DHWpipeddirectlytotheUltraboiler.

• DHWpriority—spaceheatingisdisabledfortheUltraboilerduringcallforheatfromthewaterheater.






BASEBOARD• Sizecirculatorforrequiredflow.Thecirculatormustbeselected

tohandletheheadlossthroughtheheatexchangerinadditiontothesystemheatlosses.

ALTERNATIVE HEAT SOURCE• Provideaheat source(suchasawood-firedboiler, solarheat

system,etc.)withall controlsandpiping(permanufacturer’sinstructions).Acirculatormustbesuppliedintheheatsourcepiping.

• HEAT SOURCE, associated piping and components, and allcirculators(excepttheboilercirculator)suppliedbyinstaller.

• Selectaheatexchanger for therequired load.Usea shellandtubeexchangerasshowninthepipingdiagram.Abrazed-plateexchangercanbeused,butonlyiftheHEATSOURCEsystemisclosed.

• Ifmoresuitedtotheapplication,swaptheshellsideandtubesideoftheexchangerversusthepipingdiagram.

ULTRA BOILER• Seeboilermanualforsizing.

• Circulatorshippedloosewithboiler.

• Boiler loop piping can be provided using optional Easy-UpManifolds,availablefromWeil-McLain(seepage5).

Wiring• Connectfieldwiringasshownonnextpage.

• ProvideaWeil-McLainWMCR-2circulatorzonecontrollertooperatethebaseboardsystemcirculatorandprovidecallforheattoalternativeheatsourceandtheUltraboiler.


• Provideandinstallanaquastatinthesupplylinefromtheheatexchangerasshown.ThisaquastatwillactivatetheUltraboilerifthesupplywatertemperaturefallsbelowtheaquastatsetting.


xxx



BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


D

DDD


ONOFFOFF


BOILER PRIORITY 2


SYSTEM TYPE Select from list FTB or FCL

TEMPERATURES


180 FD


DD

TIMES


DDDDD


OFFONOFF


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


44


1 DHWcirculator*



5 U-Control

6 Baseboard(orfancoil)thermostat*



9 DHWtankaquastat*

10 Outdoortemperaturesensor(suppliedwithboiler;installifU-Controlwillbesetforwarmweathershutdown)


14 AquastatinsupplylinefromHEATSOURCEpiping*

15 Weil-McLainWMCR-2circulatorcontrol*

16 Systemcirculator*

21 Ultraboiler






27 Isolationvalves*




38 Alternativeheatsourceandpipingpermfr’sinstructions*(mustincludea circulator and all piping and components specified in manufacturer’sinstructions)

40 Isolation heat exchanger (DO NOT use a brazed-plate exchanger whenconnectedtoanopensystem)*



1”1¼”1½”

Partnumber550-100-110/0411 45


Application 17a — Multiple heat sourcesNON-HYDRONIC PRIMARY HEAT SOURCE as Type 1 (LEAD) / ULTRA as Type 2 (BACKUP)

Single-zone or multi-zone BASEBOARD or FAN COIL | DHW (Direct-connected)

Purpose• Themainheatsourceforthissystemisanon-hydronicheating

unit,suchasawood-firedstoveorwarm-airfurnace.TheUltraboilerprovidesback-upheating. Inaddition, theUltraboilerprovidesdomestichotwaterviaanindirectwaterheater.

• Spaceheatingiswithbaseboard,fancoilsorother.Thisapplica-tioncanbeadaptedformultiplezonesifpipingcomponentsandcontrolsareaddedtocontrolthezonecirculatorsorzonevalvesandprovideacallforheatsignaltotheU-Control.

• DHWpipeddirectlytotheUltraboiler.

• DHWpriority—spaceheatingisdisabledfortheUltraboilerduringcallforheatfromthewaterheater.





• U-ControlPriority1MAXONTIMEissetto0minutes.ThecontrolwillimmediatelyswitchtoDHWheatingoncallfromtheDHWaquastat.

BASEBOARD• Sizecirculatorforrequiredflow.

• Thebaseboardcirculatormustbesuppliedbytheinstaller.

ALTERNATIVE HEAT SOURCE• Provideaheatsource(suchasawood-firedstove)withallcon-

trolsneeded,permanufacturer’sinstructions.

ULTRA BOILER• Seeboilermanualforsizing.


• Boiler loop piping can be provided using optional Easy-UpManifolds,availablefromWeil-McLain(seepage5).



• Provideandinstallaroomthermostat.ThethermostatprovidesacallforheattotheUltraboiler.TheUltraboilerissetasADD’LHEATDEMANDType II— itwill immediatelypass thecallforheatontothealternativeheatsource.IftheADD’LHEATDEMANDTIMEelapsesandthethermostatisstillcallingforheat, the Ultra boiler will come on and provide heat to thehydronicsystem.

Set the Ultra boiler Priority 1 MAX ON TIME to 0 minutes.TheboilerwillimmediatelyswitchtoDHWmodeoncallfromtheDHWaquastat.


xxx



BOILER SETTINGS



HIGH LIMIT D



ADD’L HEAT DEMAND TYPE Type 2 – BACKUP

ADD’L HEAT DEMAND TIME 60 minutes

SYSTEM SETTINGS

BOILER PRIORITY 1



TEMPERATURES


180 FD


DD

TIMES


0 minutesDDDD


OFFONON


BOILER PRIORITY 2

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES


D60 minutes

DDD


ONOFFOFF


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


46


1 DHWcirculator*


3 System(orzone)circulator*


5 U-Control

6 Roomthermostat*



9 DHWtankaquastat*

10 Outdoortemperaturesensor(suppliedwithboiler;installifU-Controlwillbesetforwarmweathershutdown)


21 Ultraboiler






27 Isolationvalves*




38 Alternativeheatsource,installedpermfr’sinstructions*



1”1¼”1½”

Partnumber550-100-110/0411 47


Application 18 — Multiple boilersMultiple Ultra boilers | Multiple-zone SPACE HEATING (Circulators with WMCR) | DHW (Direct-connected)

Purpose• Space heating with multiple Ultra boilers and multi-zone

spaceheatingusingbaseboard,fancoils,orother(zoningwithcirculators).

• DHWpipeddirectlytooneboiler.

• DHWpriority—spaceheatingandheaterexchangerheatingaredisabledduringcallforheatfromwaterheater.

Circulators and piping




• PipetheindirectwaterheatertothelastSHADOWboiler.TheU-Controlon the lastSHADOWboiler is set to immediatelyswitch to DHW heating on call from the DHW aquastat. SetsystemtypetoDHW-DIRECT.

BASEBOARD or FAN COIL• Multiplezones.

• Sizecirculatorsforrequiredflow.

• Zoningcirculatorssuppliedbyinstaller.

BOILER• Ultraboilerpipingmustbeprimary/secondaryasshown,with

theboilerpipedinasecondaryloopandtheDHWpipedtothelastSHADOWboiler.

• Seeboilermanualforsizing.

• Circulatorshippedloosewitheachboiler.


• This application applies only to multiple-zone space heating,usingWeil-McLainzonecontroller.


• ProvideWeil-McLainWMCR circulator zone controller forzonecirculators.

• ConnecttheDHWaquastatonlytothelastboilerintheseries.

LEAD Boiler U-Control settings

xxx

D

— value must be set (or verified) as listed


See SHADOW boiler settings on pages 50 and 51

BOILER SETTINGS



HIGH LIMIT D



ADD’L HEAT DEMAND TYPE Type 3 – LEAD


SYSTEM SETTINGS

BOILER PRIORITY 1


SYSTEM TYPE Select from list Select type used

TEMPERATURES


180 F or as req’dD (70f) or as req’DD (0f) or as req’DD or as requireD

DD

TIMES

Max On Time


D

DDD


OFFONOFF


BOILER PRIORITY 2

Not used


TEMPERATURES


DDDDDD

TIMES


DDDD


DDD


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


48


1 DHWcirculator*


3 Zonecirculators*


5 U-Control

6 Zonethermostats*



9 DHWtankaquastat*




21 Ultraboiler






27 Isolationvalves*




40 Manifolds,Weil-McLainEasy-Fitshown*



1”1¼”1½”

Partnumber550-100-110/0411 49


Application 18 — Multiple boilers (continued)


U-Control setting notes (LEAD boiler)• Additionalheattimeisset to5minutestodelaystartofnext

boilerinsequenceenoughtoallowsystemtorespond.Changethissettingvalueifdesired.

• Seefollowingpagesforadditionboilersettinginformation.

DO NOTsettheLEADboilerPRIORITY1SYS-TEMTYPEtoCustomorDHW.ShadowboilerssettoTYPE4willnotworkwiththesesettings.

The modulating signal from U-Control P16of one boiler to P15 of the next is polaritysensitive.

Connect wires + to + and – to – as shown.Thatis,P16–1goestoP15–6andP16–2goestoP15–5.

U-Control setting notes (SHADOW boilers)



SettheADD’LHEATDEMANDTIMEto5min-utes,orlongerifpossible.Thisisthetimedelaybeforethemodulatingsignalwillbepassedontothenextboilerinseriesforadditionalspaceheatingcapacity.

InstallsystemSUPPLYandRETURNsensorsand OUTDOOR sensor for every boiler, asshown in the piping and wiring diagramsforthisapplication.ShadowboilerswillonlystartandstopbasedontheirMODULATEONorOFFDIFF.Thisreducesthe likelihoodofexcessivecyclingasheatdemandchanges.

Non-DHW SHADOW Boiler U-Control settings

xxx

D



See other boiler settings on pages 48 and 51

BOILER SETTINGS



HIGH LIMIT D



ADD’L HEAT DEMAND TYPE Type 4 – SHADOW


SYSTEM SETTINGS

BOILER PRIORITY 1


SYSTEM TYPE Select from list SAME AS LEAD

TEMPERATURES


SAME AS LEADSAME AS LEADSAME AS LEADSAME AS LEAD

5 F10 F

TIMES

Max On Time


D

DDD


OFFONOFF


BOILER PRIORITY 2

Not used


TEMPERATURES


DDDDDD

TIMES


DDDD


DDD


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


50



U-Control setting notes (LAST SHADOW boiler)



TheindirectwaterheatermustbeconnectedtotheLASTboilerinthesequence.Thisensuresthatthemodulatingsignalfrompreviousboilerswillbepassedalongtothenextboiler.

Set the last SHADOW boiler Priority 1 MAX ON TIME to 0 minutes.Theboilerwill im-mediatelyswitchtoDHWmodeoncallfromtheDHWaquastat.MAXONTIMEisthemaximumtimetheboilerwillcontinuetooperateunderthecurrentPRIORITYifalowerpriorityiscallingforheat.

Install system SUPPLY and RETURN sen-sorsandOUTDOORsensorforeveryboiler.Shadowboilerswill start and stopbasedontheir MODULATE ON or OFF DIFF. Thisreducesthelikelihoodofexcessivecyclingasheatdemandchanges.

SelectDHWDIRECTfortheDHWBOILERPRIORITY2.ThisinformsthecontrolthattheDHWtankisdirectlyconnectedtotheboiler.

DHW SHADOW Boiler U-Control settings

xxx

D



See other boiler settings on pages 48 and 50

BOILER SETTINGS SET TO



HIGH LIMIT D

WWSD TEMP opt

ADjUST OUTDOOR opt



SYSTEM SETTINGS NEXT MENU NEXT MENU SET TO

BOILER PRIORITY 1

Space heating


TEMPERATURES



10 F5 F

TIMES

Max On Time


0 minutes

DDD


OFFONOFF


BOILER PRIORITY 2

DHW

SYSTEM TYPE Select from list DHW–DIRECT

TEMPERATURES

Max Supply


190 F

DDDD

TIMES


D60 minuntes

DDD


ONOFFOFF


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411 51


Application 19 — Multiple boilersMultiple Ultra boilers | Multi-zone SPACE HEATING & DHW (In system) (Circulators with WMCR controllers)

Purpose• SpaceheatingwithmultipleUltraboilers,andbaseboardorfan

coils,withDHWsuppliedbysystempiping.• DHWconnectedtoprimarywithasecondaryconnection.Mul-

tipleDHWtanksarezonedwithcirculators.• DHWpriority(accomplishedusingaSPSTrelay,item42,not

throughtheU-Control)—spaceheatingisdisabledduringcallforheatfromwaterheater.


DHW• DHWcirculatorssuppliedbyinstaller.• TheSPSTrelay(item42)setforDHWprioritydisablesspace

heatingaslongastheU-ControlCirculator3outputisactivated—thedurationofthisdomesticpriorityoperationisdeterminedbytheLEADboiler’sPriority1MAXONTIMEsetting.Setthisvalue to 60 minutes for typical application. This time can bechanged to suit job requirements.OMITrelay42 ifdomesticpriorityisnotrequired.

BASEBOARD• Sizecirculatorsforrequiredflow.• Allzonecirculatorssuppliedbyinstaller.

* =Supplied by installer

1 DHWcirculators*

2 BOILERcirculators(shippedloosewithboiler)

3 Zonecirculators*

4 120VACpowersupply,15-ampminimumrat-ing

5 U-Control

6 Zonethermostats*



9 DHWtankaquastats*

10 Outdoor temperature sensor (supplied withboiler;installifU-Controlwillbesetforout-doorresetoperation)


12 Weil-McLainWMCRcirculatorzonecontrollerforbaseboardorfancoilzones*

13 Weil-McLainWMCRcirculatorzonecontrollerforDHWcirculators*

21 Ultraboilers

22 Indirectwaterheaters*




26 Fresh water supply — install per applicablecodes*

27 Isolationvalves*




40 Weil-McLain Easy-Fit headers (or field-fabricatedequivalent)forconnectionofboilerorwaterheaterpipingtoprimaryloop*

41 Distributionmanifoldsforpipingtobaseboardorfancoilzones*

42 SPST relay, 120VAC coil, normally open —whenclosed,thespaceheatingWMCRsensesthepriorityzoneisactiveandwillpreventotherspace heating zones from running until theclosureonthepriorityzoneends

LEGEND

continued

Partnumber550-100-110/0411


52



1”1¼”1½”

Partnumber550-100-110/0411 53




BOILER

• Piping must be primary/secondary as shown, with the boilerpipedinasecondaryloopandtheDHWpipedinasecondaryloopwithconnectionsspanningtheboilerconnections.

• Seeboilermanualforsizing.

• Circulatorshippedloosewitheachboiler.

Wiring

• Connectfieldwiringasshownonpage52.


• Provide twoWeil-McLainWMCR circulator zone controllers—oneforDHWcirculatorzoningandtheotherforbaseboardorfancoilzoning.

• ProvideSPSTrelay,120VACcoil,normallyopencontactifdo-mesticpriorityisrequired.(ThisconfigurationusesthepriorityzoneofthespaceheatingWMCRzonecontroller.)

U-Control setting notes

• See the tables on pages 54 and 55 for required and optionalsettings.

• ToseethenavigationsequencetoaccesstheBOILERSETTINGSandSYSTEMSETTINGSmenus,seepage7.



DO NOTsetanyboiler’sPRIORITY1SYSTEMTYPE to Custom or DHW–DIRECT. Shadowboilers set toTYPE4willnotworkwith thesesettings.

DONOTset theU-Controls foroutdoorresetoperation.ThesystemmustprovideboilerwatersuitableforDHWoperation.

InstallsystemSUPPLYandRETURNsensorsforeveryboiler.

SettheADD’LHEATDEMANDTIMEto5min-utes,orasdesired.Thisisthetimedelaybeforethemodulatingsignalwillbepassedontothenextboilerinseriesforadditionalheatingcapacity.

DHW OPERATION — ADDITIONAL HEAT DEMAND TIME:Theadditionalheatdemandtimesettingmayhavetobe0minutesiftheDHW demand is large compared to totalboilercapacity.Ifthetimingistoolong,theboilerswillnotprovidefastenoughresponse.

The MAX ON TIME setting for Priority 1willdisablespaceheatingforthisamountoftime.Attheendofthistime,theU-ControlwillswitchtoPriority2


xxx

D



See SHADOW boiler settings on pages 55

BOILER SETTINGS



HIGH LIMIT D




ADD’L HEAT DEMAND TIME 5 minutes (see NOTICE on page 54)

SYSTEM SETTINGS

BOILER PRIORITY 1

DHW (must be set up as DHW–SYSTEM)

SYSTEM TYPE Select from list DHW–SYSTEM

TEMPERATURES

Max Supply


190 F

DDDD

TIMES

Max On Time


60 minuntes

DDD


OFFONON


BOILER PRIORITY 2

Space heating (baseboard or fan coil)


TEMPERATURES


190 F190 F

DDDD

TIMES

Max On Time


D

DDD


OFFONOFF


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


54



SHADOW Boiler U-Control settings

xxx

D



See LEAD boiler settings on pages 54

BOILER SETTINGS



HIGH LIMIT D

WWSD TEMP opt

ADjUST OUTDOOR opt


ADD’L HEAT DEMAND TIME 5 minutes (see NOTICE on page 54)

SYSTEM SETTINGS

BOILER PRIORITY 1

Space heating (baseboard or fan coil)


TEMPERATURES


190 FDDDDD

TIMES

Max On Time


D

DDD


OFFONOFF


BOILER PRIORITY 2

Not used


TEMPERATURES


DDDDDD

TIMES


DDDD


DDD


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411 55


Application 20 — Multiple boilersMultiple Ultra boilers | Multiple loads on SECONDARY loops | DHW (Direct-connected)

Purpose• SpaceheatingwithmultipleUltraboilers,withmultiple-zone

baseboardspaceheating.• DHWpipeddirectlytooneboiler.• DHWpriority—spaceheatingandheaterexchangerheatingare



PRIMARY PIPING• Provides crossover-style connection for multiple subsystems.

Eachsubsystemconnectsviaasecondarylooptake-off.• Sizecirculatorforrequiredflow—primary(system)circulator

suppliedbyinstaller.

SUBSYSTEMS• Subsystemsupply/returnpipingmustbeconnectedtocrossover

bridgeswithsecondaryconnectionsspacedapartasshown.• Subsystemscanuseanymeansdesired,suchasbaseboard,cast

ironradiators,fancoils,heatexchangerorradiant.• Providecontrolsandcomponentsneededforzoning(asshown

intypicalsubsystemexample).


1 DHWcirculator*

2 BOILERcirculators(shippedloosewithboiler)

3 Systemcirculator*


5 U-Control

6 Zonethermostats,typical*



9 DHWtankaquastat*



12 Typical—Weil-McLainWMCRcirculatorzonecontrollerforbaseboardorfancoilzones*

16 Baseboardzonecirculators*

21 Ultraboilers






27 Isolationvalves*




40 Weil-McLain Easy-Fit headers (or field-fabricatedequivalent)forconnectionofboilerorwaterheaterpipingtoprimaryloop*

41 Distributionmanifoldsforpipingtobaseboardorfancoilzones*

43 Balancingvalves*

45 Secondaryconnectionstoheatingsubsystems*

continued

LEGEND

Partnumber550-100-110/0411


56

Piping overview• Pipingusesacrossoverbridgeforeachsub-

system.Thesubsystemsupplyandreturnpipesmustbeconnectedusingasecondaryconnectionfromthebridgeasshown.

• Use thebalancingvalves in thecrossoverbridgelinestobalanceflowasneeded.

• A typical subsystem comprised of base-boardheatingzoneswithzonecirculatorsis illustrated.Thewiringdiagramon theoppositepageshowsthecirculatorzoningpanelforthissubsystem.

• Other subsystemscouldprovideheat forradiant heating, fan coil units, pool heatexchangers,etc.

• Domestichotwaterissuppliedbyanindi-rectwaterheaterpipedtothelastboilerintheLEAD/SHADOWsequence.WhentheDHW aquastat calls for heat, the boilercirculatorturnsoffandtheDHWcirculatorturnson.Otherboilerscontinuetoprovideheattothesystem.

• Themajoradvantagetothetwo-pipepri-mary/secondarymethodshownhereisthatallsubsystemsreceivesupplywateratthesametemperature.Temperaturecanthenbe regulated in the subsystemasneeded.Incontrast,aone-pipeprimary/secondarysystem loses temperature as heat is ex-tractedbysubsystemsarounditsperimeter.



1”1¼”1½”

Partnumber550-100-110/0411 57








• Seeboilermanualforsizing.• Circulatorshippedloosewithboiler.

Wiring• Connectfieldwiringasshownonpage56.• For circulators connected to the U-Control, the maximum


• Provide all piping and controls needed for each subsystemconnected.

U-Control setting notes• See the tables on pages 58 and 59 for required and optional

settings.• ToseethenavigationsequencetoaccesstheBOILERSETTINGS




SettheADD’LHEATDEMANDTIMEto5min-utes,orasdesired.Thisisthetimedelaybeforethemodulatingsignalwillbepassedonto thenextboilerinseriesforadditionalspaceheatingcapacity.

DO NOTsettheLEADboilerPRIORITY1SYS-TEMTYPEtoCustomorDHW.ShadowboilerssettoTYPE4willnotworkwiththesesettings.

LAST SHADOW boiler only—SelectDHWDIRECT for the DHW BOILER PRIORITY 2.ThisinformsthecontrolthattheDHWtankisdirectlyconnectedtotheboiler

InstallsystemSUPPLYandRETURNsensorsand OUTDOOR sensor for every boiler, asshown in the piping and wiring diagramsforthisapplication.ShadowboilerswillonlystartandstopbasedontheirMODULATEONorOFFDIFF.Thisreducesthe likelihoodofexcessivecyclingasheatdemandchanges.

Set the last SHADOW boiler MAX ON TIME to 0 minutes. The boiler will immediatelyswitchtoDHWmodeoncallfromtheDHWaquastat.




xxx

D



See SHADOW boiler settings on page 59

BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

Select system type most rep-resentative of subsystems con-nected


TEMPERATURES


180 FD (70f) or as req’DD (0f) or as req’DD or as requireD

DD

TIMES

Max On Time


D

DDD


OFFONON


BOILER PRIORITY 2

Not used


TEMPERATURES


DDDDDD

TIMES


DDDD


DDD


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


58




xxx

D



See LEAD boiler settings on page 58

BOILER SETTINGS



HIGH LIMIT D

WWSD TEMP opt

ADjUST OUTDOOR opt



SYSTEM SETTINGS

BOILER PRIORITY 1

Space heating


TEMPERATURES



10 F5 F

TIMES

Max On Time


0 minutes

DDD


OFFONOFF


BOILER PRIORITY 2

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES


D60 minuntes

DDD


ONOFFOFF


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD


xxx

D




BOILER SETTINGS



HIGH LIMIT D

WWSD TEMP opt

ADjUST OUTDOOR opt



SYSTEM SETTINGS

BOILER PRIORITY 1

Space heating


TEMPERATURES



5 F10 F

TIMES

Max On Time


D

DDD


OFFONOFF


BOILER PRIORITY 2

Not used


TEMPERATURES


DDDDDD

TIMES


DDDD


DDD


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411 59


Application 21 — Multiple boilersBASE LOADING with ULTRA boilers | DHW (Direct connected)

Purpose• Onanexistingornewinstallation,providebase loadingwith

high-efficiencyUltraboilers.• Usealargeboileronlyasneeded,suchasduringhighheat

demandperiods(lowoutdoortemperatureperiods).• TheWMR-21relay,SPSTrelayandoutdoortemperature

controlshowninthisapplicationautomaticallyenableordisablethelargeboiler—atoutdoortemperaturesabovetheoutdoortemperaturecontrolsetting,thelargeboilerisnotenabled.Atcolderoutdoortemperatures,whentheloadishigher,thelargeboilerisenabled.

• AnalternatemethodistouseaMOD-CON-CNCcontrol-ler.Thisdeviceprovidesautomaticswitchingofbaseloadboilers based on outdoor temperature and also providesboilersequencing.

• Therecommendedtemperaturesettingsinthisapplicationarebased on typical baseboard, radiator or fan coil systems. Forradiant systems or any other lower temperature installation,settheU-Controlandsystemaquastattemperaturesasneeded.

DO NOT set the system aquastat (item 46) higher than 180°F.TheUltraboilerswilllockoutiftemperatureexceeds190°F.SettheUltraLEADboilerPriority1MAXSUPPLYtemperature20°Flowerthanthesystemaquastatsetting.

• DHWispipeddirectlytooneoftheUltrabaseloadboilers.IfadditionalDHWcapacityisrequired,pipetheDHWunitsinasecondaryloopasinApplication19—Multipleboilers,page52.DHWpriority—spaceheatingisdisabledontheDHWboilerduringcallforheatfromthewaterheater.


1 DHWcirculator*

2 UltraBOILERcirculators(shippedloosewithboiler)

3 System circulator (typical in-line pumpshown)*


5 U-Control



9 DHWtankaquastat*



13 Relay,120VACcoil,SPST*


21 Ultraboilers






27 Isolationvalves*




40 Weil-McLain Easy-Fit headers (or field-fabricatedequivalent)forconnectionofUltraboilerpipingtoprimaryloop*

45 Largeboiler,eitherexistingornewinstallation— typically a commercial-sized forced draftboileronexistinginstallations—canbeoneor more forced draft boilers or one or moreUltra Commercial boilers for new or boilerreplacementinstallations

46 Systemaquastat—See NOTICE at left

47 Outdoor temperature control (HoneywellT6031Aorequivalent)—breakonrise—toshut off large boiler(s) above the outdoorcontrol setpoint (typically between 40°F and50°F)

46 System thermostat or system heat demandcontact

continued

LEGEND

Partnumber550-100-110/0411


60

Recommended sizing• Forbestresultsinheatingresponse,andtoavoidexcessivecyclinginchangeoverbetween

boilers,sizetheUltraboilertotalinputtoatleasttheminimuminputofthelargeboiler.

• IfaddingUltraboilersforbaseloadingwithanexistinglargeboiler,considerreplacingtheforceddraftburnerwithahi-loormodulatingburner.Thiswillprovideaturndowninboilerfiringrateandreducetherecommendedinputforthebaseloadboilers.Itwillalso improve the large boiler’s efficiency since the combustion efficiency will usuallyincreasenoticeablyatlowfire.

Piping overview• Thisexamplecanapplytoanexistinglargeboiler,suchasacommercial-sizedforceddraft

castironsectionalboilerliketheWeil-McLain80or88series.

• Foranewsysteminstallation,youcoulduseoneormoreUltraCommercialboilersforthelargeboiler,withoneormoreUltraResidentialboilersforthebaseloadunits.



1”1¼”1½”

• Thepipingisshownwithaconventionaldirect-connectedsystem.Thepreferredmethodwouldbetopipethelargeboiler(s)onasecondaryloopasshownintheinset,upperright.TheUltraResi-dentialboilersmustbepipedonasecondaryloopasshownabove.

• TheindirectwaterheaterisconnectedtooneoftheUltraboilers,ensuringthatDHWgenerationalwaystakesadvantageoftheUltraboiler’shighefficiency.

• ForeachUltraboiler,strapasupplysensorandreturnsensortothesystempipingasshown.

Partnumber550-100-110/0411 61


SYSTEM PIPING• Size system circulator for required flow — system circulator

suppliedbyinstaller.• Pipingshowninthisexampleisdirect-connected,andisaccept-

ableforanexistinginstallation,butprimary/secondarypipingispreferred.Forboilerreplacementandnewinstallations,useasecondarycircuitforthelargeboiler(s)asshowninthepipingdiagraminset.







• Seeboilermanualforsizingpiping.


Wiring• Connectfieldwiringasshownonpage60.• For circulators connected to the U-Control, the maximum


• ProvideandinstallaWMR-21relay,aSPSTrelaywith120VACcoilandanoutdoortemperaturecontrol(HoneywellT6031Aorequivalent).Set the outdoor temperature control be-tween 40°F and 50°F for most installations.Mountthesensingbulboutsideusinganoutdoorshield.Locatethebulbawayfromdirectsunlightandinalocationnotsubjecttosnow,iceordebrisaccumulation.

U-Control setting notes• See the tables on pages 62 and 63 for required and optional

settings.• ToseethenavigationsequencetoaccesstheBOILERSETTINGS


ThemodulatingsignalfromU-ControlP16ofoneboilertoP15ofthenextispolaritysensitive.


DO NOT set the LEAD boiler PRIORITY 1SYSTEM TYPE to Custom or DHW DIRECT.ShadowboilerssettoTYPE4willnotworkwiththesesettings.

Install system SUPPLY and RETURN sen-sorsandOUTDOORsensorforeveryboiler.Shadowboilerswill start and stopbasedontheir MODULATE ON or OFF DIFF. Thisreducesthelikelihoodofexcessivecyclingasheatdemandchanges.

Set the ADD’L HEAT DEMAND TIME to5 minutes, or longer if possible. This is thetimedelaybeforethemodulatingsignalwillbepassedontothenextboilerinseries.

Set the last SHADOW boiler Priority 1 MAX ON TIME to 0 minutes.Theboilerwillim-mediatelyswitchtoDHWmodeoncallfromtheDHWaquastat.




xxx

D



See SHADOW boiler settings on page 59

BOILER SETTINGS



HIGH LIMIT D





SYSTEM SETTINGS

BOILER PRIORITY 1

Large boiler enabled

Select system type most representa-tive of subsystems connected


TEMPERATURES


160 F140 f70 f0 fDD

TIMES

Max On Time


15 minutes

DDD


ONONON


BOILER PRIORITY 2

Large boiler NOT enabled

Select system type most representa-tive of subsystems connected


TEMPERATURES


190 F70 f70 f0 fDD

TIMES


15 minutesDDDD


OFFONON


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411


62




xxx

D




BOILER SETTINGS



HIGH LIMIT D

WWSD TEMP opt

ADjUST OUTDOOR opt



SYSTEM SETTINGS

BOILER PRIORITY 1

Space heating


TEMPERATURES



10 F5 F

TIMES

Max On Time


0 minutes

DDD


OFFONOFF


BOILER PRIORITY 2

DHW


TEMPERATURES

Max Supply


190 F

DDDD

TIMES


D60 minuntes

DDD


ONOFFOFF


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD


xxx

D




BOILER SETTINGS



HIGH LIMIT D

WWSD TEMP opt

ADjUST OUTDOOR opt



SYSTEM SETTINGS

BOILER PRIORITY 1

Space heating


TEMPERATURES


190 F70 f70 f0 f5 F

10 F

TIMES

Max On Time


D

DDD


OFFONOFF


BOILER PRIORITY 2

Not used


TEMPERATURES


DDDDDD

TIMES


DDDD


DDD


BOILER PRIORITY 3

Not used


TEMPERATURES


DDDDDD


DDDD


DDD



DDD


DDD

Partnumber550-100-110/0411 63


Appendix AOUTDOOR RESET Settings and Troubleshooting

Outdoor reset control settings Outdoorresetcanimprovecomfortandoperatingefficiency,

makingthebestpossibleuseoftheUltraboiler’scondens-ingability.ImproperlysettingoutdoorresetsettingsintheU-Control can result in insufficientheat.FactorydefaultsettingsfortheU-Controlwillworkinmanyinstances,butnotall.Usetheinformationbelowtosetthecontroltomeettheinstallationconditions.

1. Outdoor reset tries to match heat input to the system heat loss.Asoutdoortemperaturerises(heatlossdecreases),theU-Controlreducesthesupplywatertemperaturetothesystem,thusreducingheatinput.

2. Setupdesiredsettingsforeachoftheprioritiesused

3. MIN and MAX SUPPLY temperatures—Foranexplanationof the target temperaturesandassociatedoutdoor temperatures, seeFigure1.

a. MAX OD RESETmeanstheoutdoortemperatureatwhichthetarget temperaturereaches itsmaximumvalue(MAXSUPPLY).IntheexampleofFigure1,thisoccursat0°Foutside(thefactorydefaultsetting).

MAXODRESETshouldequaltheODT(outdoordesigntempera-ture)fortheinstallation’slocation.

b. MAX SUPPLYshouldequaltherequiredsupplywatertempera-tureforthesystematdesignmaximumheatloss(typically180°Fforfinnedtubebaseboardonnewinstallations).

c. MIN OD RESETmeanstheoutdoortemperatureatwhichthetargettemperaturereachesitsminimum(MINSUPPLY).IntheexampleofFigure1,thisoccursat70°F(thefactorydefault).

d. MIN SUPPLYshouldequalthedesiredminimumsupplywatertemperatureforthesystem.Thefactorydefaultis130°F.Thiscouldbesetaslowas70°F,whichwouldsupply“zeroheat”whenoutdoortemperatureis70°F,becausesupplywatertempwouldequalroomtemp.SeeexamplesinFigure1.

e. Note that the reset lines are curved. The shape of this curve ismatched(characterized)totheresponseofthesystemtypechosen.Thisensuresthemosteffectiveresetoperation.

4. Modulate on differential—Thetemperaturemustdropthismanydegreesbelowtargettemperaturefortheboilertocomeon.

5. Modulate off differential —While the boiler is firing, as thetemperature increasesabovethetarget temperature, theboilerfiringrateisreduced.Atthismanydegreesabovethetargettemperature,theboilershutsdown.

6. Boost interval—ThisadjustmentislocatedintheTIMESmenus.Theboosttimerstartsonacallforheat.Iftheboostintervaltimepassesandthecallforheatisstillon,theU-Control“boosts”thesupplywatertemperaturesetpointby10°F.Thisoccursagainifanotherboostintervalelapses.BoostwillcontinueuntilthesetpointreachestheMAXSUPPLYsetting.Thepurposeofboostistocompensateforchangesindemandnotaddressedbytheresetcurve.Typically,setboostto30minutes.Thefactorydefault is“OFF”—that is,boost isnotenabledwithdefaultsettings.

Troubleshooting insufficient heat calls1. Insufficientheatcanoccurifthesupplywatertemperaturetotheheating

unitsisnothotenough.Possiblyreasonsare:

a. Thefactorydefaultsettingsforoutdoorresetarenotagoodmatchtothesystemneeds.

b. Thebaseboardmayhavebeensizedforhigherwatersupplytem-perature. Older systems were often sized for baseboard supplytemperatureof210°F(averagewatertemperatureof200°F).

c. SeeadditionalpotentialcausesintheNOTICEbelow.

2. Onewaytocheckwhetherwatersupplytemperatureistheproblemistomeasurethewatertemperaturegoingtotheheatingunits.Thenseeifthisisreasonableby:

a. Lookuptheheatingunitoutputratingat190°F.

b. Lookuptheheatingunitoutputratingatthewatertemperatureyoumeasured.

c. Measurethecurrentoutsidetemperature.

d. LookuptheODT(outdoordesigntemperature)forthearea.

e. Atthisoutsidetemperature,theheatingunitoutputshouldbeaboutequalto:

Output=(outputat190°F)x(70–outsidetemp)/(70–ODT)

3. Makesuretheoutdoorsensorisproperlyshieldedsoitisn’theatingupduetosolargain.Toverify,measureoutsidetemperatureandcomparetothevalueshownontheU-Controldisplay.Ifthesensorisshieldedandstillreadingincorrectly,changetheADJUSTOUTDOORsettingintheBoilerSettingsmenu.

4. Intheeventofaninsufficientheatcall,makethefollowingadjustmentstoensuretheU-Controlisdeliveringthebestpossibleperformancefortheapplication.

a. MAX OD RESET—Set toavalueofODT(outdoordesigntempforthelocation)PLUS15°F.(Example:foranODTof10°F,setto10°+15°=25°F.)

b. MAX SUPPLY—Setto190°F.(Exception:Forradiantsystems,settodesignoperatingtemperatureatmaximumheatload.)

c. MIN OD RESET—Setto70°F(factorydefault).

d. MIN SUPPLY — Set to 70°F (increase value to 130°F if theproblempersists).

e. BOOST INTERVAL—Setto30minutes.

Iftheinsufficientheatissuepersistsaftermakingtheadjust-mentsrecommendedhere,lookforotherpossiblecauses,suchas:

Iftheproblemonlyoccursinsomeareasofthehome,theheatingunitstheremaybeundersized,ortheproblemareamay not have control over boiler operation.Additionalheatingunitsorazoningchangemaycorrecttheproblem.

Otherissues,suchasairinthesystem,poorflowdistributionortoolittleflowcanalsocauseinsufficientheat.

Figure 1 Typical outdoor reset curves

Partnumber550-100-110/0411


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Appendix BBOILER SETTINGS menu detail

Partnumber550-100-110/0411 65


Appendix CSYSTEM SETTINGS menu detail

= SELECT button(press to select ahighlighted entry andmove to next screen)

Use and keys tohighlight the desireditem on a screen.

Note 2 Use and keys tochange the values on thesescreens. Use key to save thevalue.

Note 1 The menus for priority 1,2 and 3 are the same. Dependingon System Type chosen, defaultvalues will vary and some menuitems may be omitted.

SYSTEM SETTINGS

CHANGE SETTINGPREVIOUS ENTER

BOILER PRIORITY 1

BOILER PRIORITY 2

BOILER PRIORITY 3

CIRCULATOR EXERCISING

FREEZE PROTECT CIRCS

FREEZE PROTECTIONCIRCULATORS


CIRCULATOR 1: ON

CIRCULATOR 2: ON

CIRCULATOR 3: ON

CIRCULATOR EXERCISING


CIRCULATOR 1: ON

CIRCULATOR 2: ON

CIRCULATOR 3: ON

BOILER PRIORITY X


SYSTEM TYPE: OFF

TEMPERATURES

TIMES

CIRCULATORS

MAXIMUM RATE: 94%

MINIMUM RATE: 33%

BSX SYSTEM SETTING


OFFFAN COILFINNED TUBE BASEBOARDCAST IRON BASEBOARDCAST IRON RADIATORRADIANT — SLAB ON GRADERADIANT — THIN SLABRADIANT — BELOW FLOORRADIANT — ABOVE FLOORCUSTOMDHW – DIRECTDHW – SYSTEM

PRIORITY XDESIGN TEMPERATURES


MAX SUPPLY: ### °FMIN SUPPLY: ### °F

MAX OUTDOOR: ### °FMIN OUTDOOR: ### °F

MODULATE ON DIFF: ###°FMODULATE OFF DIFF:###°F

PRIORITY X TIMES


MAX ON TIME: ### MIN

MIN ON TIME: ### MIN

BOOST INTERVAL:### MIN

PRE PUMP TIME: ### SEC

POST PUMP TIME:### SEC

BOILER PRIORITY XCIRCULATOR SETTINGS


CIRCULATOR 1: ###

CIRCULATOR 2: ###

CIRCULATOR 3: ###

PRIORITY X MAX RATE


XX

PRIORITY X MIN RATE


XX

CIRCULATOR EXERCISINGCIRCULATOR X


ON

OFF

FREEZE PROTECTIONCIRCULATOR X


ON

OFF

Note 1

XXXXXXXXXXXXXXXXX


XX°

XXXXXXXXXXXXXXXXX

XXXXXXXXXXX


XX

Note 3

Note 3 Screen headings andvalue units (degrees, minutes,seconds, etc.) will depend onitem selected.

Note 2

Note 2 Note 2

BOILER PRIORITY XCIRCULATOR X


ON

OFF

Note 2

Note 3

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Partnumber550-100-110/0411 67



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