1

WARNINGImproper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a qualified installer, service agency or the gas supplier

CAUTIONDanger of sharp metallic edges. Can cause injury.Take care when servicing unit to avoid accidental contact with sharp edges.

INSTALLATION INSTRUCTIONS FOR ECONOMIZERS USED WITH ZC,ZG,ZH 092-150 UNITS

Z1ECON30B-1 ECONOMIZER(Cat No. 10Z29)

ECONOMIZERS

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Package 1 of 1 contains: 1 - Economizer damper assembly 1 - Outdoor air damper 1 - Return air damper 1 - Gravity exhaust damper 1 - Economizer actuator 1 - Economizer control module 1 - Outdoor air temperature sensor 1 - Top seal panel 1 - Lower panel (hood top) 1 - Mixed air sensor 1 - Hardware bag 1 - Hood parts package 1 - Left hood side 1 - Right hood side 1 - Hood divider 1-Hoodfilter 1 - Wiring Diagram LabelOrder Of Installation Economizer Mixed air sensor Optional OA and RA sensors Optional Power Exhaust Fans

Shipping and Packing List

ApplicationThe Z1ECON30B-1 economizer is used with ZC,ZG,ZH 092-150unitsindownflowairdischargeapplications.Economizerdampers will modulate to maintain 55oF (13oC) supply air when outdoorairissuitable.Themixedairtemperaturesensormeasuresthesupplyairsensibletemperature.An outdoor air sensor is used to determine whether outdoor air issuitableforfreecooling.Theoutdoorairsensorisfactory-installedinalleconomizers.Otheroutdoorandreturnair(OAand RA) sensor options are available to determine whether outdoorairissuitableforfreecooling.SeeTable1andtheinstructionsprovidedwithoptionalsenors.

INDOOR AIR QUALITY SENSOR (A63)An IAQ sensor is used when demand control ventilation (DCV) isspecified.Damperminimumpositioncanbesetlowerthantraditionalminimumairrequirementsresultingincostsavings.The IAQ sensor allows the economizer control module to open dampers to traditional ventilation requirements as room occupancy (CO2)increases.For proper operation, the IAQ sensor must provide a 2-10VDC, 100ohmimpedancesignal.ConnectsensorleadstoAQandAQ1 terminals on the economizer control module located in the filtersection.

TABLE 1

Sensors Dampers modulate to maintain55oF mixed air (R1) when:

*Single OA Sensible OA temperature (S175) is lowerthan free cooling setpoint

Single OA Enthalpy OA temperature and humidity (A7) is suitable for free cooling

Differential Enthalpy- 1 in OA & 1 in RA

OA temperature and humidity (A7) is lower than RA temperature and

humidity(A62).

Figure 1

*Single OA sensible sensor is shipped standard on economizer

Litho U.S.A.© 2014 3/2014

Supersedes: New

2

Figure 2

Install Economizer1. Disconnect all power sources to the unit2. Remove the following panels from the unit; - Filter door panel - Return chamber panel - Blower access panel - Control panelWhenfilterdoorandreturnchamberareremovedtherewill be a cross support still in the unit streatching from side to side of the return chamber

3. Removehoodpartspackage.4. Installdamperassemblyintounitunderthecrosssupport.

Fit opening in bottom of damper assembly over the return air opening.SeeFigure3.

5. The upper panel of the economizer will screw into the cross supportthroughpre-punchedholes.

6. Securetheeconomizertounitbasepanwithfivescrews.

Blower access panel (backside)Filter door

Return chamber panel

Figure 4

Filter doorTop seal panel

Outside air temperature sensor

Outsideair damper

Plug for optional power

exhaust

See note 5above

Grommet for high voltagepower exhaust wires 9 pin economizer/

mixed air sensorplug (J142)

Gravityexhaust damper

Figure 3 - Economizer Installtion

EconomizerJ10, P10 Plug

3

Figure 5 - Wiring Detail

Install Mixed Air Sensor 1. Remove the mixed air sensor from the economizer parts

bag.Thesensorhasasmallringterminal.SeeFig.6.2. Locate the 2 mixed air sensors wires in the unit from plug

J3.Themixedairsensorwirecoloriswhite.Attachthese2wirestothemixedairsensorwires.

3. Mount the mixed air sensor to the indoor fan through the existingscrewontheblower.SeeFig.6A.

4. Secure wires in place so they don’t interfere with unit operation.

5. Replaceallpanels.

Economizer Wiring1. Theeconomizercontrolmoduleislocatedbelowtheactuator

forshipping.Relocatethecontroltotheunitcontrolbox,seeFigure5A.

2. Routethecontrolwirestounitterminalblock(TB1)andconnect these wires to TB1 as following (see Figure 5A):

• Connect all female terminals to TB1 - Pink (24V) to R; Grey (GND) to ground; Yel (Cool 1) to Y1; and Blue (Cool2)toY2. • Disconnect the factory installed terminals at TB1, Y1 andY2.Connecttheseterminalstocontrolmale terminal Y1 and Y23. Attachthecontrolharnessjack(J142)toprewiredharness

plug(P142).4. Ateconomizer/filtercompartment,attacheconomizerplug

(P10)toprewiredharnessjack(J10).SeeFigure3.5. ConnectanyoptionalsensorsasshowninFigure5.6. Ifoptionalpowerexhaustisused,wireaccordingto

instructionsprovidedwithpowerexhaust.SeeFigure5.7. Applywiringdiagramtothecontrolpanel.SeeFigure5B.

P142TO

P10 J10

J142

ECONOMIZERCONTROLMODULE

RED

RED

GRYYEL

J18

PN

K

GR

YW

HT

BLK

BLK

BLUVIO

GRY

*PLUGJ24

PNK

DAMPER MOTOR

BLU

8

IAQSENSOR(OPTION)

7

J9

P9

DIFFERENTIAL ENTHALPYSENSOR(OPTION)

SRSR+

SO+SO

TT1

EF1 EF AQ1AQ

Actuator plug

*3 Pin High Voltage Power Exhaust Plug

POWER EXHPLUG5-PIN

OUTDOOR AIRTEMPERATURE

SENSORPROVIDED(ENTHALPYOPTIONAL)

ECONOMIZER

Mixed AirSensor Provided (R1)

WIRE CONNECTIONS

4

Figure 7

Right hoodside

HoodfilterHood divider

Left hoodside

Hood top(lower panel)

24”

48 3/16” 25 5/16””

Figure 6A - Mixed Air Sensor Location

Mixed Air

Sensor

Figure 6 - Mixed Air Sensor

Figure 5A - HVAC Control Box

Figure 5B

Economizer(J142, P142)

Apply wiring diagram here

EconomizerControl Module

5

Outdoor Air Hood Economizer Control ModuleIfusingapowerexhaustaccessoryskipthisstep.Thehoodpartsshippedwiththeeconomizerwillnotbeused.1. Removethehoodtopfromtheeconomizerassembly.2. Installthehoodsidestothehoodtop,seeFigure7.3. Screwthehooddividertothehoodsides.Dividersits

betweentheleftandrighthoodside.Bottomangleofdividerisusedforthefilterrack.

Figure 8

Figure 9

Figure 10

4. Openthefilterclipsontheunderneathsideofthehoodtopandinsertfilter.SeeFigure8.

5. Withhoodassembled,fitthematingflangeonhoodtopunderneaththe“knuckle”onthetopsealpanel.InstallthehoodovereconomizerasshowninFigure3,4and9.

6. Screwhoodtounitasshowninfigure9.

TABLE 2ECONOMIZER CONTROL MODULE LEDsLED When Lighted Indicates

Free Cool Outdoor air is suitable for free coolingDemand ControlVentilation (DCV)

Indoor IAQ is above set point requirement more fresh air

A6 ENTHALPY CONTROL

A

B C

D

Open

MinPos

FREE COOLING SETPOINT;A=Completely counterclockwise

D=Completely clockwise

FREE COOL LED

FreeCool

DCV

EXH

EXHSet

2V 10V

DCVMax

2V 10V

DCVSet

2V 10VIAQ SETPOINT

DCV LED

DAMPERMINIMUMPOSITION

IAQ MAXIMUMPOSITION

(set higher thanminimum position)

Unitfilteraccess door

Upper PanelEconomizerhood

Hood top

Hoodfilter

Filter clip

Economizer Control Module

6

Table 3

FREE COOLING CHANGEOVERNote - The following conditions assume unit is operating during occupied period.Single Outdoor Air Temperature Sensing:The temperature sensor shipped with the economizer is used to determineoutdoorairsuitabilityforfree-cooling.Thesensorhasafixedchangeoverandcannotbeadjusted.SettheA,B,C,Dsettingoneconomizercontrolmoduletothe“D”setting.The sensor will allow economizer to go to free-cooling mode when the temperature falls below 55oF, and will then disable free-cooling when temperatures rise above 70oF.

Free cooling will be enabled when the outdoor air enthalpy is lowerthanthefreecoolingsetpoint.Table3showsthefreecoolingsetpointswhichareadjustableontheeconomizercontrolmodule.For example: At setting A (Table 3), free cooling will be enabled when outdoor air enthalpy is lower than 73oFand50%RH.Ifindoorairistoowarmorhumid,lowerthesetpointtoB.Atsetting B, free cooling will be enabled at 70oFand50%RH.Differential Enthalpy Sensing:Outdoor air and differential enthalpy sensors are optional accessories.Twoenthalpysensorscanbeusedtocompareoutdoorairtoreturnair.Whenoutdoorairiscoolerthanreturnair and free cooling setpoint, outdoor air is suitable for free cooling.Adjustthefreecoolingsetpointto“D”inthisapplication.Table3showsthefreecoolingsetpointsforenthalpysensors.For example: At setting D (Table 3), free cooling will be enable when outdoor air enthalpy is lower than return air enthalpy AND freecoolingsetpoint63°F/50%RH.Ifindoorairistoocoolordry,increasethesetpointtoC.When return air is cooler than outdoor air, the damper will modulated to the minimum position

Single Enthalpy Sensing:Note - The following conditions assume unit is operating during occupied period.Single Outdoor Air Enthalpy Sensing:Theenthalpysensorisanoptionalaccessory.Thetemperaturesensor shipped with the economizer will be removed and discarded,andtheenthalpysensorfieldinstalled.Theenthalpysensor is used to determine outdoor air suitablility for free-cooling,seeTable3.

7

DAMPER MINIMUM POSITION SETTINGNOTE - 24 volts must be provided at unit 24 volt leads R and OC to enable economizer operation (allowing minimum fresh air). Typically a separately ordered thermostat or energy management system with an occupied/unoccupied output is connected between R and OC leads. The thermostat will provide 24 volts to the economizer control during the occupied time period to enable the economizer. If a device is not used to enable the economizer, install a jumper between R and OC leads R and OC to maintain minimum position continuously.Make wire connections to leads R and OC as shown in literature provided with thermostat or energy management system.1. Setthermostattooccupiedmodeifthefeatureisavailable.

MakesurejumperisinplacebetweenleadsRandOCifusingathermostatwhichdoesnothavethefeature.

2. Rotate MIN POS SET potentiometer to approximate desired freshairpercentage.Usecarewhenadjustingminimumpotentiometertoavoiddamagingpotentiometer.

Note - Damper minimum position can be set lower than traditional minimum air requirements when an IAQ sensor is specified.

3. Measureoutdoorairtemperature.Markthepointonthebottom line of chart 1 and label the point “A” (40oF, 4oC shown).

4. Measurereturnairtemperature.Markthatpointonthetopline of chart 1 and label the point “B” (74oF, 23oCshown).

5. Measuremixedair(outdoorandreturnair)temperature.Mark that point on the top line of chart 1 and label point “C” (70oF, 21oCshown).

6. DrawastraightlinebetweenpointAandB.7. DrawaverticallinethroughpointC.8. Drawahorizontallinewherethetwolinesmeet.Readthe

percentoffreshairintakeontheside.9. Iffreshairpercentageislessthandesired,adjustMIN

POSSETpotentiometerclockwise(furtheropen).Iffreshairpercentageismorethandesired,adjustMINPOSSETpotentiometercounterclockwise(lessopen).Repeatsteps 3 through 8 until calculation reads desired fresh air percentage.

−20−29

−10−23

0−18

10−12

20−7

30−1

404

5010

6016

7021

8027

9032

10038

0

10

30

40

50

60

70

80

90

100

20

OUTDOOR AIR TEMPERATURE

0

10

30

40

50

60

70

80

90

100

20

MIXED AND RETURN AIR TEMPERATURE

CHART 1CALCULATE MINIMUM FRESH AIR PERCENTAGE

A

BC

FC

FC

−20−29

−10−23

0−18

10−12

20−7

30−1

404

5010

6016

7021

8027

9032

10038

FC

FC

8

DCV SET AND DCV MAX SETTINGThe DCV SET potentiometer is factory-set at approximately 50% ofthepotentiometerrange.Usingastandard1-2000ppmCO2 sensor, dampers will start to open when the IAQ sensor reads approximately1000ppm.AdjusttheDCVSETpotentiometertotheapproximatesettingspecifiedbythecontrolscontractor.Refertofigure10.The DCV MAX potentiometer is factory-set at approximately 50%ofthepotentiometerrangeor6VDC.Damperswillopenapproximately half way when CO2risesabovesetpoint.AdjusttheDCVMAXpotentiometertotheapproximatesettingspecifiedbythecontrolcontractor.Refertofigure10.Note - DCV Max must be set higher than economizer minimum position setting for proper demand control ventilation.

Economizer OperationWhen the outdoor air is suitable, dampers will modulate between minimum position and full open to maintain 55oF (12oC) supply air.See Table 4 for economizer operation when outdoor air is suitable.SeeTable5foreconomizeroperationwhenoutdoorairisNOTsuitable.

IAQ SensorDuring the occupied period, dampers will open to DCV MAX when IAQ reading is above setpoint (regardless of thermostat demandoroutdoorairsuitability).DCVMAXwillNOToverridedamperfull-openposition.TheDCVMAXsettingmayoverridedamper free cooling position when occupancy is high and outdoorairtemperaturesarelow.Note - If mixed air sensor senses mixed air temperature below 45oF (7oC), dampers will move to minimum position until mixed air temperature rises to 48oF (9oC)

TABLE 4ECONOMIZER OPERATION

OUTDOOR AIR IS SUITABLE FOR FREE COOLING -- FREE COOL LED

THERMOSTAT DEMANDDAMPER

MECHANICAL COOLINGUNOCCUPIED OCCUPIED1

OF Closed Closed NoF Closed Minimum No

Y1 Modulating* Modulating* NoY2 Modulating* Modulating* STAGE 1

TABLE 5ECONOMIZER OPERATION

OUTDOOR AIR IS NOT SUITABLE FOR FREE COOLING -- FREE COOL LED

THERMOSTAT DEMANDDAMPER

MECHANICAL COOLINGUNOCCUPIED OCCUPIED1

OF Closed Closed NoF Closed Minimum* No

Y1 Closed Minimum* STAGE 1Y2 Closed Minimum* STAGE 1

*IAQsensorcanopendampertoDCVmax.1Damperpositionwhennooccupied/unoccupiedsignalisavailablefrombuildingthermostatorenergymanagementsystem.

*IAQsensorcanopendampertoDCVmax.1Damperpositionwhennooccupied/unoccupiedsignalisavailablefrombuildingthermostatorenergymanagementsystem.

FormNo.1-1P