section a8 cb boilers

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CONTENTS

FEATURES AND BENEFITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-3

Unique Dimple Tube Design: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-3358 Square Feet of Heating Surface: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-3

Low Furnace Location: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-3

PRODUCT OFFERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-3

DIMENSIONS AND RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-4

PERFORMANCE DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-5

ENGINEERING DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-12

Boiler Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-12

Burner Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-17

Gas-Fired Burners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-17

Gas Pressure Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-18

Oil-Fired Burners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-19Boiler Room Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-19

Stack/Breeching Size Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-25

SAMPLE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-25


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MODEL CB OHIO SPECIAL BOILERS Firetube Boilers

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ILLUSTRATIONS

Figure A8-1. Model CB Ohio Special Steam Boiler Dimensions - Sheet 1 of 2 . . . . . . . . . . . . . . . A8-7

Figure A8-2. Model CB Ohio Special Steam Boiler Dimensions - Sheet 2 of 2 . . . . . . . . . . . . . . . A8-8

Figure A8-3. Space Required to Open Rear Head on Model CB Ohio Special BoilersEquipped with Davits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-11

Figure A8-4. Model CB Ohio Special Boilers Lifting Lug Location . . . . . . . . . . . . . . . . . . . . . . . . A8-11

Figure A8-5. Model CB Ohio Special Boiler Mounting Piers . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-12

Figure A8-6. Secondary Air Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-14

Figure A8-7. Complete Linkage Assembly, Combination Gas and Oil . . . . . . . . . . . . . . . . . . . . . . A8-15

Figure A8-8. Gas Modulating Cam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-16

Figure A8-9. Model CB Ohio Special Gas Train Components . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-20

Figure A8-10. Typical Gas Piping Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-21

Figure A8-11. Model CB Ohio Special Firetube Boilers Standard GasTrain Connection Size and Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-22

Figure A8-12. CB a Ohio Special Boilers, No. 2 Oil Connection Size,Location and Recommended Line Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-22

Figure A8-13. No. 2 Oil Piping, Single Boiler Installation, Remote Oil Pump . . . . . . . . . . . . . . . . A8-23

Figure A8-14. No. 2 Oil Piping, Multiple Boiler Installation, Remote Oil Pumps . . . . . . . . . . . . . . A8-23

Figure A8-15. No. 2 Oil Piping, Multiple Boiler Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-24

Figure A8-16. No. 2 Oil Transfer Tank Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-24

Figure A8-17. Boiler Room Length (Typical Layouts), Model CB Ohio Special Shown . . . . . . . . . . A8-26

Figure A8-18. Boiler Room Width (Typical Layout), Model CB Ohio Special Shown . . . . . . . . . . . A8-26

TABLES

Table A8-1. Model CB Ohio Special Steam Boiler Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-6

Table A8-2. Model CB Ohio Special Boilers Heating Surface . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-12

Table A8-3. Model CB Ohio Special Boilers Steam Volume and Disengaging Area . . . . . . . . . . . . . A8-13

Table A8-4. Model CB Ohio Special Boilers Steam Boiler Safety Valve Openings . . . . . . . . . . . . . A8-13

Table A8-5. Model CB Ohio Special Firetube Boilers Recommended Steam Nozzle Size(To Maintain 4000 to 5000 fpm Nozzle Velocity) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-13

Table A8-6. Model CB Ohio Special Firetube Boilers Recommended Non-Return Valve Size . . . . . A8-14

Table A8-7. Blowdown Tank Sizing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-14

Table A8-8. CB Ohio Special Firetube Boilers Minimum Required Gas Pressureat Entrance to Standard and FM Gas Trains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-16

Table A8-9. CB Ohio Special Boilers Minimum Gas Pressure at Entrance to Gas TrainsEquipped with Industrial Risk Insurers (IRI) Requirements . . . . . . . . . . . . . . . . . . . . . . . A8-16

Table A8-10. Model CB Ohio Special Boilers Under and Oversized Standard and FM Gas Trains . . A8-17

Table A8-11. Model CB Ohio Special Boilers Under and Oversized IRI Gas Trains, . . . . . . . . . . . . A8-17

Table A8-12. Minimum Required Gas Pressure Altitude Conversion . . . . . . . . . . . . . . . . . . . . . . A8-18Table A8-13. Gas and Heat Content of Natural Gas and Propane Gas . . . . . . . . . . . . . . . . . . . . . A8-18

The following section contains information on Cleaver-Brooks Ohio Special Boilers.

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Section A8 MODEL CB OHIO SPECIAL BOILERS

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FEATURES AND BENEFITS

The Cleaver-Brooks Ohio Special Firetube boiler is designed, manufactured, andpackaged by Cleaver-Brooks specifically for operation in the state of Ohio, under therules and regulations for unattended units. The unique design of the Ohio SpecialBoiler serves your steam needs and reduces unnecessary labor costs. All units are

factory fire tested and shipped as a package, ready for quick connection to utilities.In addition to the features provided on all Cleaver-Brooks Firetube boilers, thefollowing features apply to the Ohio Specials.

Ensures high gas turbulence and increased efficiency without turbulators,spinners, and other high maintenance devices.

• Dimple tubes also reduce the film coefficient on the gas side to transfer moreheat, thus achieving greater output with less heating surface.

• The greatest amount offered in any packaged boiler for unattended steam boiler

operation in Ohio - means long life and years of service at the high efficiencies.

• Furnace located well below water level with generous clearance from bottom ofboiler, allowing proper circulation.

• Low furnace provides additional safety margin between furnace and water level.

• Reduces water carryover, producing drier steam.

PRODUCT OFFERING

Cleaver-Brooks Ohio Special Firetube boilers are available high pressure steamdesigns. Burners are available to fire natural gas, light oil, or a combination of oil

and gas.Ohio Special Boilers include:

• Four-pass dryback design (100 hp).

• Two-pass dryback design (125 - 225 hp).

• Two-pass wetback design (125 - 200 hp).

• 15 psig low pressure steam.

• 150, 200, and 250 psig high pressure steam

• Natural gas or light oil firing.

Available options: For option details, contact your local Cleaver-Brooks authorizedrepresentative. In summary, options include the following:

Boiler Options

• Drain valves.

• Additional screwed or flanged trappings.

• Surge load baffles.

• Seismic design.

• Blowdown valves.


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MODEL CB OHIO SPECIAL BOILERS Section A8

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• Non-return valves.

• Feedwater valves and regulators.

• Special doors, davited, hinged, left swing.

• Special base rails.

• Surface blowdown systems.

• Weather-proofing.

Burner/Control Options

Special modulation controls.

Low NOx equipment.

Optional flame safeguard controller.

Lead/lag system.

Special insurance and code requirements (e.g., IRI, FM, CSD1).

Remote contacts.

Additional relay points and indicator lights.

Main disconnect.

Elapsed time meter.

Voltmeter/micro-ampmeter.

NEMA enclosures.

Low fired hold controls.

Remote emergency shut-off (115V).

Circuit breaker.

Day/night controls.

Special power requirements.

Fuel Options

• Automatic fuel changeover.

• Special gas pressure regulator.

• Oversized/undersized gas trains.

• Gas strainer.

• Special fuel shut-off valves.

• Special pilot.

• Alternate fuel firing.

• Special oil pumps.

DIMENSIONS AND RATINGS

For dimension and rating information for Ohio Special boilers, refer to the followingtables and illustrations:

• Table A8-1. Model CB Ohio Special Steam Boiler Ratings.

• Figure A8-1. Model CB Ohio Special Steam Boiler Dimensions.

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• Figure A8-3. Space Required to Open Rear Head on Model CB Ohio SpecialBoilers Equipped with Davits.

• Figure A8-4. Lifting Lug Locations, Model CB Ohio Special Boilers.

• Figure A8-5. Model CB Ohio Special Boiler Mounting Piers.

PERFORMANCE DATAFor efficiency and emission data for Ohio Special Boilers, contact your local Cleaver-Brooks authorized representative.

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BOILER HP 100S 125S 150S 175S 200S 225S

WEIGHT IN POUNDS

Normal Water Capacity 4625 7000 7000 8500 8500 8500

Approx Wt -15 psig 7800 9300 9300 12600 12600 12600

Approx Wt -150 psig 8500 9900 9900 13500 13500 13500

Approx Wt - 200 psig 9000 10500 10500 14200 14200 14200Water Capacity Flooded 5420 8673 8673 10485 10485 10485

RATINGS SEA LEVEL TO 3000 FT

Steam - lbs/hr (212°F) 3450 4313 5175 6038 6900 7763

Btu Output (1000 Btu/hr) 3348 4184 5021 5858 6695 7531

APPROXIMATE FUEL CONSUMPTION AT RATED CAPACITIES

Light Oil gph(140,000 Btu/gal)

30 37.4 44.8 52.5 59.8 67.5

Nat Gas CFH(1000 Btu/cu-ft)

4185 5230 6277 7323 8369 9415

Nat Gas -Therms/hr 41.9 52.3 62.8 73.2 83.7 94.2

POWER REQUIREMENTS - ELECTRIC (60 Hz)

Blower Motor, hp (all models) 3 5 7-1/2 10 15 20

Oil Pump Motor, hp (No. 2 Oil) 1/3 1/2 1/2 1/2 1/2 1/2

Air Compressor Motor hp (Oil Fired Only)

2Air Compressor Belt Driven From Blower Motor

NOTES:1. Standard Voltage is 230 or 460/3/60 Hz.2. Burner control circuit Voltage is 115/1/60 Hz,1/2 kVA load.3. Side mounted air compressor (3 hp motor) recommended for 200S and 225S.

Table A8-1. Model CB Ohio Special Steam Boiler Ratings


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MODEL HP DIM 100S 125S 150S 175S 200S 225S

LENGTH

Overall A 171-1/2 163-1/2 163-1/2 200-1/2 204-1/2 207-1/2

Shell B 131 113 113 149 149 149

Base Frame C 130 112 112 148 148 148

Front Head Extension (Ap-prox)

D 22 31 31 32 36 39

Rear Head Extension E 18-1/2 19-1/2 19-1/2 19-1/2 19-1/2 19-1/2

Flange to Nozzle (15 psig) F 65-1/2 53 53 74.5 74.5 74.5

Flange to Nozzle (150 psig) F 72.5 53 53 66 66 66

Figure A8-1. Model CB Ohio Special Steam Boiler Dimensions - Sheet 1 of 2

Q

Z

W W

S

SIGHTPORT

ELECTRICAL SERVICECONNECTIONS

(CONTROL CIRCUIT120/1/60)

CC

R

BB

EY

T

H

A

M

N

OO

O

L

LL

I

KK

.5"C

PJ

KGG

D

EE

F

B

RR/RF/RD

DD

FF


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MODEL HP DIM 100S 125S 150S 175S 200S 225S

WIDTH

Overall I 73 85 85 85 85 85

ID Boiler J 48 60 60 60 60 60

Center to Water Column K 39 45 45 45 45 45

Center to Outside Hinge KK 29 35 35 35 35 35

Center to Lagging L 27 33 33 33 33 33

Center to Auxiliary LWCO LL 34 40 40 40 40 40

Base-Outside M 37-5/8 52-1/2 52-1/2 52-1/2 52-1/2 52-1/2

Base-Inside N 29-5/8 44-1/2 44-1/2 44-1/2 44-1/2 44-1/2

HEIGHT

Overall OO 78-3/4 86 86 86 86 86

Base to Vent Outlet O 70 85 85 85 85 85

Base to Steam Outlet P 66 77 77 77 77 77

Base Frame Q 12 12 12 12 12 12Base to Bottom Boiler R 16 16 16 16 16 16

CONNECTIONS

Chemical Feed H 1 1 1 1 1 1

Feedwater, Right & Left S 1-1/4 1-1/2 1-1/2 1-1/2 1-1/2 1-1/2

Auxiliary Connection Z 1 1 1 1 1 1

Steam Nozzle (15 psig)A Y 8 FLG 8 FLG 8 FLG 8 FLG 10 FLG 10 FLG

Steam Nozzle (150 psig)B Y 4 FLG 4 FLG 4 FLG 4 FLG 4 FLG 4 FLG

Drain-Front & Rear (15 psig only) W 1-1/2 1-1/2 1-1/2 2 2 2

Blowdown-Front & Rear (150psig)

W 1-1/4 1-1/2 1-1/2 1-1/2 1-1/2 1-1/2

Surface Blow (150 psig only) T 1 1 1 1 1 1

Vent Stack Dia. (Flanged) BB 12 16 16 16 16 16

Flange to Center Vent CC 7 9 9 9 9 9

CLEARANCES

Rear Door Swing DD 55 32 32 32 32 32

Front Door Swing EE 55 67 67 67 67 67

Tube Removal, Rear FF 123 103 103 139 139 139

Tube Removal, Front GG 113 91 91 127 127 127

Min Room Length for Rear TubeRemoval

RR 309 283 283 355 355 355

Min Room Length for Front TubeRemoval

RF 299 236 236 308 308 308

Tube Removal thru Door RD 241 212 212 248 248 248

NOTE: Accompanying dimensions, while sufficiently accurate for layout purposes, must be confirmed for construction by certified dimension prints.A. Flanged 150 psig ANSIB. Flanged 300 psig ANSI

Figure A8-1. Model CB Ohio Special Steam Boiler Dimensions - Sheet 2 of 2


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NEAR

SIDE

VIEW B

FAR

SIDE

FRONT

FLANGE

VIEWA

E DIA. HOLE

A

CL

B

DD

C

BOILER HP(CB) ALL DIMENSIONS IN INCH-ES

A B C D

100S 68 27 67 2-1/2

125S-150S 80 29-1/2 66 3

175S-225S 80 29-1/2 88 3

NOTE: A, B and C Dimensions may vary by 1/2 inch.

Figure A8-3. Model CB Ohio Special Boilers Lifting Lug Location

BOILER HP DIMENSION (INCHES)A B C D E

CB 100S 27 48 38 60 26

CB 125S thru 225S 33 55 45 68 32

Figure A8-2. Space Required to Open Rear Head on Model CB Ohio Special Boilers Equipped with Davits


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ENGINEERING DATA

The following engineering information is provided for the Ohio Special Boilers. Ohio

Special boilers are designated by an “S” following the horsepower number.Additional detail is available from your local Cleaver-Brooks authorizedrepresentative.

Boiler Information Table A8-3 shows heating surfaces for Model CB Ohio Special Boilers.

Table A8-4 shows steam volume and disengaging area for Model CB Ohio SpecialBoilers.

Table A8-5 lists quantity and outlet size for safety valves supplied on Model CB OhioSpecial Boilers.

Table A8-6 gives recommended steam nozzle sizes based on 4000-5000 fpm

BOILER HP A B C D E F G X

CB 100S 6 8 130 26 42 4 29-5/8 8-1/4

CB 125S, 150S 6 9 112 39-1/2 57-1/2 4 44-1/2 10-1/4

CB 175S, 200S, 225S 6 9 148 39-1/2 57-1/2 4 44-1/2 10-1/4

NOTES:1. All numbers in table are in inches.

2. 6-inch high mounting piers recommended for use beneath the boiler base frame. The use of these piers provides increased inspection ac-cessibility to the piping beneath the boiler and added height for washing down the area beneath the boiler.

Figure A8-4. Model CB Ohio Special Boiler Mounting Piers

BOILERHP

HEATING SURFACE (SQ-FT)

FIRESIDE WATERSIDE

100S 350 388

125S-150S 358 386

175S, 200S, 225S 358 384

Table A8-2. Model CB Ohio Special Boilers Heating Surface

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BOILER HP STEAM VOLUME CU-FT STEAM RELIEVING AREA SQ-IN

HIGH PRESSURE A LOW PRESSURE B HIGH PRESSURE A LOW PRESSURE B

100S 14.3 23.7 4367 4975

125S, 150S 28.4 38.9 5086 5473

175S, 200S, 225S 38.5 52.7 6899 7423

NOTES: Based on normal water level.A. Based on 150 psig design pressure.B. Based on 15 psig design pressure.

Table A8-3. Model CB Ohio Special Boilers Steam Volume and Disengaging Area

VALVESETTING

15 PSIG STEAM 100 PSIG STEAM 125 PSIG STEAM 150 PSIG STEAM 200 PSIG STEAM 250 PSIG STEAM

BOILERHP

NO. OFVALVES-REQ'D

OUTLETSIZE(IN.)

NO. OFVALVES-REQ'D

OUTLETSIZE(IN.)

NO. OFVALVESREQ'D

OUTLETSIZE(IN.)

NO. OFVALVES-REQ'D

OUTLETSIZE(IN.)

NO. OFVALVES-REQ'D

OUTLETSIZE(IN.)

NO. OFVALVESREQ'D

OUTLETSIZE(IN.)

100S 1 2-1/2 1 2 1 2 1 1-1/2 1 1-1/2 1 1-1/4

125S 1 2-1/2 1 2-1/2 2 (1) 2(1) 1-1/2

1 2 1 1-1/2 1 1-1/2

150S 1 3 1 2-1/2 1 2-1/2 1 2 1 1-1/2 1 1-1/2

175S 1 3 1 2-1/2 1 2-1/2 1 2 1 2 1 1-1/2

200S 1 3 2 2 1 2-1/2 1 2-1/2 1 2 1 2

225S 2 2-1/2 2 2 1 2-1/2 1 2-1/2 1 2 1 2

NOTE:Valve manufacturers are Kunkle, Consolidated or Conbraco, depending on availability.

Table A8-4. Model CB Ohio Special Boilers Steam Boiler Safety Valve Openings

BOILER HP

OPERATINGPRESSUREPSIG

100S 125S 150S 175S 200S 225S

15 8 8 8 8 10 10

30 6 6 6 6 8 8

40 6 6 6 6 6 8

50 4 6 6 6 6 6

75 4 4 4 6 6 6

100 4 4 4 4 6 6125 4 4 4 4 4 4

150 2.5 3 3 4 4 4

200 2.5 2.5 3 3 4 4

NOTES:1. Steam nozzle sizes given in inches.2. Recommended steam nozzle sizes based on 4000 to 5000fpm steam velocity. Spool pieces (300 psig flanges) areavailable in the following sizes (in inches): 3x2-1/2x30,4x3x30, 6x4x36, 8x6x48, and 10x8x48.

Table A8-5. Model CB Ohio Special Firetube Boilers

Recommended Steam Nozzle Size(To Maintain 4000 to 5000 fpm Nozzle Velocity)


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BOILERHP

BOILER CA-PACITY(LB/HR)

OPERATING PRESSURES (PSIG)

50 75 100 125 150 175 200

100S 3450 2-1/2 2-1/2 NA NA NA NA NA

125S 4313 3 2-1/2 2-1/2 2-1/2 NA NA NA

150S 5175 3 3 2-1/2 2-1/2 2-1/2 2-1/2 NA

175S 6038 3 3 2-1/2 2-1/2 2-1/2 2-1/2 NA

200S 6900 3* 3 3 3 3 2-1/2 2-1/2

225S 7763 3 3 3 3 3 2-1/2 2-1/2

Note: Valve sizes (300 psig flanges) given in inches.Standard Non-Return valve selections limited to a maxi-mum 2 to1 turndoen (50% of full boiler output* Indicates pressure drop of less than 7.5 psig. All otherselections are less than 6 psig pressure drop.

steam velocity. Model CB Ohio Special Firetube Boilers.Table A8-7 shows recommended non-return valve sizes for Model CB Ohio SpecialFiretube Boilers.

Blowdown Water Requirements

Some local codes require blowdown tanks to be constructed in accordance withrecommendations of the National Board of Boiler and Pressure Vessel Inspectors.

The National Board’s recommendations base the size of the blowdown tank on theremoval of at least 4 inches of water from the boiler.

Table A8-6. Model CB Ohio Special Firetube Boilers Recommended Non-Return Valve Size

BOILER HP WATER (GAL)

100S 80

125S-150S 87

175S-225S 118

NOTE: Quantity of water removed from boiler by lowering normal wa-ter line 4"

Table A8-7. Blowdown Tank Sizing Information

Figure A8-5. Secondary Air Flow Diagram

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45

45

J A C K S H A F T

G A S M O D U L A T I N G C A M

C A M A D J U S T I N G

S C R E W

GAS MODUL ATIN G

C A M F O L L O W E R

G A S M E T E R I N G

V A L V E

R O T A R Y A I R

D A M P E R

R OD

MODUL ATIN G MOTOR

M O T O R

MODUL ATIN G

M O T O R A R MS P R I N G L O A D E D

B U T T E R F L Y G A S V A L V E A R M

O V E R T R A V E L L I N K A G E

B U T T E R F L Y G A S V A L V E

R O T A R Y A I R

D A M P E R A R M F U E L O I L

C O N T R O L L E R

N O T I C E :

S E T T I N G S I N D IA G R A M

I N DI C A T E L O W F I R E

S E T T I N G O F L I N K A G E .

R O T A R Y A I R

D AM P E R S H A F T

O I L ME T E R I N G V A L V E

OIL MODUL ATIN G

C A M F O L L O W E R

OIL MODUL ATIN G

C AM

C AM

A D J U S T I N GS C R E W

R O T A R Y A I R D A M P E R

J A C K S H A F T A R M

B U T T E R F L Y

G A S V A L V E R O D

60

J A C K S H A F T

D R I V I N G A R M

MODUL ATIN G

M O T O R R O D

Figure A8-6. Complete Linkage Assembly, Combination Gas and Oil


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Figure A8-7. Gas Modulating Cam

BOILER HP CONN SIZE(IN.)

NET REG’DPRESS. REQ’D(IN. WC)

100S 2 11.0

125S 2-1/2 8.5

150S 2-1/2 13.0

175S 2-1/2 16.0

200S 2-1/2 21.0

225S 2-1/2 27.0

NOTES:1. For standard and FM gas pressure requirementsfor Canada, refer to Table A6-10, IRI Trains.2. Based on 1000 Btu/cu-ft natural gas and eleva-tions up to 700 feet.

Table A8-8. CB Ohio Special Firetube BoilersMinimum Required Gas Pressure at Entrance to

Standard and FM Gas Trains

BOILER HP CONN SIZE(IN.)

MIN PRESSREQ'D(IN. WC)

100S 2 12.0

125S 2-1/2 8.5

150S 2-1/2 13.0

175S 2-1/2 16.0

200S 2-1/2 21.0

225S 2-1/2 27.0

NOTES:1. Pressures shown also apply to standard and FMgas trains for Canada.2. Based on 1000 Btu/cu-ft natural gas and eleva-tion up to 700 feet.

Table A8-9. CB Ohio Special Boilers Minimum GasPressure at Entrance to Gas Trains Equipped with

Industrial Risk Insurers (IRI) Requirements


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Table A6-8 lists the approximate quantity of water represented by 4 inchesof water at normal operating level for Model CB Ohio Special Boilers.

Burner Information The Ohio Special Firetube Boiler encompasses an integral front head thatincludes the burner, combustion air fan, and controls as part of the boilerpackage design.

The integral front head provides for burner/boiler design as a single unitmaximizing the compatibility between the boiler and burner.

Figure A8-6 shows secondary air flow in the Ohio Special Firetube Boiler.The rotary air damper design provides standard turn down of 4:1.

Figure A8-7 shows a typical linkage assembly. The single point linkagelayout allows for easy adjustment and maximum repeatability of air/fuelratios. Included on all Ohio Special Boilers is an adjustable CAM assemblyshown in Figure A8-8.

100S 125S 150S 175S 200S 225S

PIPE SIZE PRESS

REQ’D

PIPE SIZE PRESS

REQ’D

PIPE SIZE PRESS

REQ’D

PIPE SIZE PRESS

REQ’D

PIPE SIZE PRESS

REQ’D

PIPE SIZE PRESS

REQ’D

1-1/2 24.0 2 14.5 2 19.0 2 23.5 2 31.0 2 39.0

2 11.0 2-1/2 8.5 2-1/2 13.0 2-1/2 16.0 2-1/2 21.0 2-1/2 27.0

2-1/2 9.5 3 7.5 3 11.0 3 12.5 3 15.5 3 20.0

3 8.5 4 6.5 4 9.0 4 10.0 4 12.5 4 16.0

NOTES:

1. Pipe size in inches, and pressure required in inches of WC.

2. Standard gas train shown by shaded area.

3. Pressure required is downstream of the gas pressure regulator.

Table A8-10. Model CB Ohio Special Boilers Under and Oversized Standard and FM Gas Trains

100S 125S 150S 175S 200S 225S

PIPE

SIZE

PRESS

REQ’D

PIPE

SIZE

PRESS

REQ’D

PIPE

SIZE

PRESS

REQ’D

PIPE

SIZE

PRESS

REQ’D

PIPE

SIZE

PRESS

REQ’D

PIPE

SIZE

PRESS

REQ’D

1-1/2 29.5 2 14.5 2 19.0 2 23.5 2 31.0 2 39

2 12.0 2-1/2 8.5 2-1/2 13.0 2-1/ 2 16.0 2-1/2 21.0 2-1/2 27

2-1/2 10.5 3 7.5 3 11.0 3 12.5 3 15.5 3 20

3 9.0 4 6.5 4 9.0 4 10.0 4 12.5 4 16

NOTES:

1. Pipe size in inches, and pressure required in inches WC.

2. Standard gas train shown by shaded areas.

3. Pressure required is downstream of the gas pressure regulator.

Table A8-11. Model CB Ohio Special Boilers Under and Oversized IRI Gas Trains,

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Notice

.

-- . , 6-, 6- 10, -11, -12, -13 .

. -

.

Table A8-9 shows regulated gas pressure requirements for Standard and FM gastrains for CB Ohio Special Firetube Boilers.

Table A8-10 shows regulated gas pressure requirements for IRI Gas Trains for CBOhio Special Boilers.

Table A8-11 and A8-12 show regulated gas pressure with over and undersized gastrains for CB Ohio Special Firetube Boilers.

Table A8-13 shows minimum required gas pressure altitude conversion.

The following items should be considered when selecting a regulator:

• Pressure Rating: The regulator must have a pressure rating at least equivalent tothat of the gas distribution system.

• Capacity: The capacity can be determined by multiplying the maximum burningrate (CFH) by 1.15, see Table A6-14. This 15 percent over-capacity rating ofthe regulator provides for proper regulation.

• Spring Adjustment: The spring should be suitable for a range of adjustment from50 percent under the desired regulated pressure to 50 percent over.

• Sharp Lock-Up: The regulator should include this feature to prevent thedownstream pressure (between the regulator and the boiler) from climbing whenthere is no gas flow.

BOILER

HP

TYPE OF GAS AND HEAT CONTENT

NATURAL GAS1000 (Btu/cu-ft)

PROPANE GAS2550 (Btu/cu-ft)

100S 4185 1640

125S 5230 2050

150S 6280 2465

175S 7350 2870

200S 8370 3280

225S 9415 3690

Table A8-13. Gas and Heat Content of Natural

Gas and Propane GasALTITUDE(FT)

CORRECTIONFACTOR

ALTITUDE(FT)

CORRECTIONFACTOR

1000 1.04 6000 1.252000 1.07 7000 1.30

3000 1.11 8000 1.35

4000 1.16 9000 1.40

5000 1.21 - -

To obtain minimum required gas pressure at altitudes above 700feet, multiply the pressure by the listed factors:Inches WC x 0.577 = oz/sq-in.Oz/sq-in x 1.732 = Inches WC.Inches WC x 0.0361= psig.Oz/sq-in x 0.0625 = psig.Psig x 27.71 = Inches WC.Psig x 16.0 = Oz/sq-in.

Table A8-12. Minimum Required Gas Pressure

Altitude Conversion

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• Regulators in Parallel: This type of installation can be used if the required gasvolume is very large and if the pressure drop must be kept to a minimum.

• Regulators in Series: This type of installation can be used if the available gaspressure is over 5, 10, or 20 psig. Depending on the regulator characteristics,one regulator would reduce the pressure to 2 to 3 psig, and a second regulatorwould reduce the pressure to the burner requirements.

• Regulator Location: A straight run of gas line piping should be used on bothsides of the regulator to ensure proper regulator operation. This is particularlyimportant when pilot operated regulators are used. The regulator can be locatedclose to the gas train connection, but 2 to 3 feet of straight run piping should beused on the upstream side of the regulator.

Table A8-14 shows maximum gas consumption for natural gas and propane vapor.

Figure A8-9 shows typical gas train components, and Figure A8-10 shows typicalgas train piping layouts for multiple boiler applications.

Figure A8-11 shows standard gas train sizes and locations for Model CB and CBWOhio Special Firetube Boilers.

Fuel oil consumption information is shown on the boiler rating sheets in theDimensions and Rating Section.

Figure A8-12 shows the oil connection sizes and locations for Ohio Special Boilersfiring No. 2 oil.

Figures A8-13 through A8-15 show typical oil systems and layouts.

Figure A8-16 shows the detail of an oil transfer tank (day tank) typically utilized toprovide a storage reservoir between the oil system supply pump and the boiler oilpump.

Boiler RoomInformation

Figure A6-17 shows typical boiler room length requirements.

Figure A6-18 shows typical boiler room width requirements.

Stack Support Capabilities

100 hp Ohio Special Boilers can support up to 1,000 lbs without additionalsupport.

125-225 hp Ohio Special Boilers can support up to 2,000 lbs without additionalsupport.

Boiler Room Combustion Air

When determining boiler room air requirements, the size of the room, air flow, andvelocity of air must be reviewed as follows:

1. Size (area) and location of air supply openings in boiler room.

A.Two (2) permanent air supply openings in the outer walls of the boiler room arerecommended. Locate (1) at each end of the boiler room, preferably below aheight of 7 feet. This allows air to sweep the length of the boiler.

B.Air supply openings can be louvered for weather protection, but they shouldnot be covered with fine mesh wire, as this type of covering has poor air flowqualities and is subject to clogging by dust or dirt.

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Figure A8-8. Model CB Ohio Special Gas Train Components

PILOT GAS LINE

MAIN GAS LINE

FLOW

1

4 9 11

12

13 10 8 3 14

5 6 7 2

1 Pilot Shut Off Cock X X X X X X X X

2 Pilot Shut Off Cock X X X X

3 Shut Off Cock X X X X X X X X

4 Shut Off Cock X X X X X X X X

5 Pilot Pressure Regulator X X X X X X X X

6 Pilot Pressure Gauge X X X X X X X X

7 Gas Pilot Valve X X X X X X X X

8 High Gas Pressure Switch X X X X X X X X

9 Low Gas Pressure Switch X X X X X X X X

10 Main Gas Valve with POC X X X X X X

11 Main Gas Valve without POC X X X X X X

12 Main Gas Valve without POC X X

13 Vent Valve X X X X

14 Butterfly Valve X X X X X X X X


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MODEL

CB-LEBOILERS

2" 3"

EPLUGCOCK

A

B

C

DCONTRACTOR

CONNECTIONPOINT

GAS TRAINON BOILER

STREET GAS MAIN

MODEL

CB-LEBOILERS

2" 3"

E

This figure illustrates the basic gas valve arrangement on Cleaver-Brooks boil-ers and shows the contractor's connection point. The valves and controls be-tween the contractor connection point and the gas main in the street arerepresentative of a typical installation. Actual requirements may vary depend-

ing on local codes or local gas company requirements which should be inves-tigated prior to preparation of specifications and prior to construction.

A. Utilities service valve.B. Utilities service regulator.C. Gas meter.D. Piping from meter to boiler.E. Gas pressure regulator at burner.

The size of the gas line from the meter to the gas pressure regulator at the boil-er can be very important if gas pressures are marginal. The gas line sizing isdependent on:

1. Gas pressure at outlet of gas meter (C)2. Rate of gas flow required, CFH

3. Length of pipe run (D)4. Pressure required at contractor connection point.

The local gas utility will advise the pressure that is available at the outlet of theirmeter.

Figure A8-9. Typical Gas Piping Layout


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A

PLAN VIEW

BOILER

FRONT

BOILERHP

MODEL CB& CBW

CONNECTION SIZE(IN.) (NPT)

LOCATIONDIMENSION“A” (IN.)

100S 2 44

125S-225S 2-1/2 67-1/2

Figure A8-10. Model CB Ohio Special Firetube Boilers Standard Gas Train Connection Size and Location

A

100S 3/4 11-1/2 1 1 1

125S-225S 3/4 12-1/2 1 1 1

NOTES: See No. 2 Oil Line Sizing Instruction for systems with other conditionsA. For suction line condition with a maximum of 10 Feet of lift and a total of 100 feet of

suction line.

Figure A8-11. CB a Ohio Special Boilers, No. 2 Oil Connection Size, Location and Recommended Line

Sizes


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BOILERBASE FRAME

BOILERFRONT

F.O.S.

F.O.R.

CONTRACTORCONNECTIONS AT THIS POINT

GATE VALVE

OIL PUMP NO. 1

OILPUMPNO. 2

VACUUM GAUGE STRAINERGATE VALVE

GATE VALVE

CHECK VALVE

RELIEFVALVE

(100 PSIG)

UNION

GATE VALVE

CHECK VALVE

F.O.S.

F.O.R.

BOILER

BASE FRAMEBOILER

FRONTF.O.S.

F.O.R.

CONTRACTOR

CONNECTIONS

AT THIS POINT

GATE VALVE

OIL PUMP

CHECK

VALVE

VACUUM

GAUGESTRAINER

GATE VALVE

RELIEF VALVE

UNION

GATE VALVE

CHECK VALVE

F.O.R.

F.O.S.

Figure A8-12. No. 2 Oil Piping, Single Boiler

Installation, Remote Oil Pump

Figure A8-13. No. 2 Oil Piping, Multiple Boiler

Installation, Remote Oil Pumps


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ITEM SIZE DESCRIPTION

A 1/2" NT Connection to oillevel switch

B See Note Return line to tank

C See Note Oil supply connec-tion from transfer pump

D 1/2" NPT Tank drain connec-tion

E See Note FOS connection

F 1/8" NPT Oil level test valveconnection

G See Note FOR connection

H No.80 Oil level switch

McD

NOTE: Connections should besized using recommended sizes inoil line sizing instructions.

F.O.R.

OIL LEVELTEST VALVE

OIL TRANSFER PUMP

NEAR STORAGE TANK

SUPPLY TO BOILERTERMINAL BLOCK ORTO BOILER OIL PUMP

GATEVALVE

GATEVALVE

OIL TRANSFER TANK AT LOCATION NEAR

BOILER

VENTH

F.O.S.F.O.R.

F.O.S.

CHECKVALVE STRAINER

VACUUMGAUGE

UNIONRELIEF VALVE

(100 PSIG)

3/8" MTL D

4" OR 6"STDBLACKPIPE

F

E

22"

33"

3"

2"

60"

G AB

C

5"

3"

3/16"S

3/16"S

Figure A8-15. No. 2 Oil Piping

(For elevated boiler room locations using an oil

transfer pump and tank)

Figure A8-14. No. 2 Oil Piping, Multiple Boiler Installation

100 .

...

...

...

...

(100 )

( )

A8_05-06


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C.A vent fan in the boiler room is not recommended, as it could create a slightvacuum under certain conditions and cause variations in the quantity ofcombustion air. This can result in unsatisfactory burner performance.

D.Under no condition should the total area of the air supply openings be less than(1) square foot.

E.Size the openings by using the formula:Area (sq-ft) = cfm/fpm

2. Amount of air required (cfm).

A.Combustion air - rated bhp x 8 cfm/bhp.

B.Ventilation air - rated bhp x 2 cfm/bhp or a total of 10 cfm/bhp - up to 1000feet elevation. Add 3 percent more per 1000 feet of added elevation.

3. Acceptable air velocity in Boiler Room (fpm).

A.From floor to (7) foot height - 250 fpm.

B.Above (7) foot height - 500 fpm.

C.Duct from air supply to boiler - 1000 fpm.

Example: Determine the area of the boiler room air supply openings for (1) 200 hpboiler at 800 feet altitude. The air openings are to be 5 feet above floor level.

• Air required: 200 x 10 = 2000 cfm (from 2B above).

• Air velocity: Up to 7 feet = 250 fpm (from 3 above).

• Area Required: Area = cfm = 2000/250 = 8 Sq-ft total.

• Area/Opening: 8/2 = 4 sq-ft/opening (2 required).

Notice

, .

Stack/Breeching

Size Criteria

The design of the stack and breeching must provide the required draft at each boiler

flue gas outlet. Proper draft is critical to burner performance.

Although constant pressure at the flue gas outlet of the Ohio Special is not required,it is necessary to size the stack/breeching to limit flue gas pressure variation. Theallowable pressure range is –0.25" W.C. to +0.25" W.C.

For additional information, please review Section I4, General Engineering Data(Stacks) and Section F, Stacks. Stack and breeching sizes should always be providedby a reputable stack supplier who will design the stack and breeching system basedon the above criteria. Your local Cleaver-Brooks authorized representative is capableof assisting in your evaluation of the stack/breeching design.

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FRONT

FEEDWATERTANK

BOILERFEEDWATER

PUMP

DRAIN

TRENCH

A BFEEDWATER

TANK

BOILERFEEDWATER

PUMP

DRAIN

TRENCH

1. Shortest boiler room length (Dwg A) is obtained by allowing for possible future tube replacement through a window or doorway.Allowance is only made for minimum door swing at each end of the boiler. This arrangement provides sufficient aisle space at the front ofthe boiler but a “tight” space condition at the rear. If space permits, approximately 1.5 additional feet should be allowed at the rear for ad-ditional aisle and working space.

2. Next shortest boiler room length (Dwg B) is obtained by allowing for possible future tube replacement from the front of the boiler. Allow-ance is only made for minimum door swing at the rear. If space permits, approximately 1.5 additional feet should be allowed at the rear foradditional aisle and working space.

3. A slightly longer boiler room for Model CB (Dwg C) is obtained by allowing for possible future tube replacement from the rear of the boiler.Allowance for door swing at the front provides sufficient aisle and working space at the front.

Figure A8-16. Boiler Room Length (Typical Layouts), Model CB Ohio Special Shown

Figure A8-17. Boiler Room Width (Typical Layout), Model CB Ohio Special Shown

BOILER HP 100S 125S-225S

Dimension A 78” 82"

Dimension B 105” 115"

NOTES:1. Recommended Minimum Distance Between Boiler and Wall.Dimension “A” allows for a “clear” 42" aisle between the watercolumn on the boiler and the wall. If space permits, this aisleshould be widened.

2. Recommended Minimum Distance Between Boilers.Dimension “B” between boilers allows for a “clear” aisle of 42”.If space permits, this aisle should be widened.


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100-225 hp, Steam 15, 150, 200, or 250 psig)

Sample Specification

Boiler Characteristics (Steam) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-28

General Boiler Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-28

Steam Boiler Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-29

Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-30

Efficiency Guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-35

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8-35


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Model CB Ohio Special Steam Boiler Section A8

A8-26

BBA8 04-05

100-225 hp, Steam 15, 150, 200, or 250 psig)

The following sample specifications are provided by Cleaver-Brooks to assist you in specifyingyour customer's specific needs and application.

The Sample Specifications are typically utilized as the base template for the complete boilerspecification. Contact your local Cleaver-Brooks authorized representative for information onspecial insurance requirements, special code requirements, optional equipment, or generalassistance in completing the specification.

PART 1 GENERAL

1.01 BOILER CHARACTERISTICS (STEAM)

A. The Steam Boiler shall be Cleaver-Brooks Model CB Ohio Special Fuel Series____ (100, 200, 700), ____ hp designed for ____ psig (15 or ____ psigsteam). The maximum operating pressure shall be ____ psig.

B. The boiler shall have a maximum output of ____ Btu/hr, or ____ horsepowerwhen fired with CS12-48 No. 2 oil and/or natural gas, ____ Btu/cu-ft.Electrical power available shall be ____ Volt ____ Phase ____ Cycle and 115/ 1/60 for the control circuit.

PART 2 PRODUCTS

2.01 GENERAL BOILER DESIGN

A. The boiler shall be a multi-pass horizontal firetube updraft boiler with 350square feet of total heating surface for the 100 hp and 358 square feet of totalheating surface for the 125-225 hp boilers. It shall be mounted on a heavysteel frame with integral forced draft burner and burner controls. The completepackaged boiler is built as a unit with Underwriters Laboratories listed controls.

/ , 50 .

1. The boiler shall be completely preassembled and fire tested at the factory.The unit shall be ready for immediate mounting on floor or simplefoundation and ready for attachment of water, steam, fuel, electrical,vent, steam, and blowdown connections.

B. Boiler Shell (Steam)

1. The boiler shell must be constructed in accordance with ASME BoilerCode and must receive authorized boiler inspection prior to shipment. Acopy of the inspection report shall be furnished the purchaser.

2. Two lifting eyes shall be located on top of the boiler.

3. Front and rear doors on the boiler shall be hinged or davited. Doors are tobe sealed with fiberglass tadpole gaskets and fastened tightly using heavycapscrews that thread into replaceable brass nuts.

4. Rear refractory and insulation shall be contained in the formed doorwhich must swing open for inspection of brick work.

5. The boiler tubes shall not include swirlers, turbulators, or other add-ondevices.


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Section A8 Model CB Ohio Special Steam Boiler

A8-27

BBA8 04-05

6. Front and rear tube sheets and all tubes must be fully accessible forinspection and cleaning when the doors are swung open. The boiler shallbe furnished with adequate handholes to facilitate boiler inspection andcleaning.

7. For boilers 125 horsepower and over, a manhole shall be provided.

8. The exhaust gas vent shall be located near the front of the boiler on the

top center line and shall be capable of supporting:

• 100 hp 1000 lbs. and shall contain a stack thermometer.

• 125-225 hp 2000 lbs. and shall contain a stack thermometer.

9. Observation ports for the inspection of flame conditions shall be providedat each end of the boiler.

10. The boiler insulation shall consist of a 2 inch fiberglass blanket under asectional preformed sheet metal lagging. This insulation must be readilyremovable and capable of being reinstalled, if required.

11. The entire boiler base frame and other components shall be factorypainted before shipment using a hard-finish enamel coating.

2.02 STEAM BOILER TRIMA. Water Column

A water column shall be located on the right hand side of the boiler complete with gauge glassset, and water column blowdown valves.

B. Feedwater Pump Control

The boiler feedwater pump control shall be included as an integral part of the water column toautomatically actuate a motor driven feedwater pump maintaining the boiler water level withinnormal limits.

C. Low Water Cutoff

The low water cutoff shall be included as an integral part of the boiler feedwater control wired

into the burner control circuit to prevent burner operation if the boiler water level falls below asafe level.

D. Auxiliary Low Water Cutoff

Auxiliary low water cutoff shall be included, piped to the vessel, and wired to the burnercontrol circuit. A manual reset device shall be used on this control.

E. Steam Pressure Gauge

The steam pressure gauge shall be located at the front of the boiler and include cock and testconnection.

F. Safety Relief Valves

Safety valves of a type and size to comply with ASME Code requirements shall be shipped

loose.G. Steam Pressure Controls

The steam pressure control to regulate burner operation shall be mounted near the watercolumn.

2.03 BURNER

A. Mode of Operation

Burner operation shall be full modulation principle. The burner shall always return to low fire


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BBA8 04-05

position for ignition.

B. Forced Draft Blower

1. All air for combustion shall be supplied by a forced draft blower mountedin the front boiler door, above the burner, to eliminate vibration andreduce noise level.

2. Maximum sound level of the boiler/burner package shall not exceed ____dBA (when measured in accordance with ABMA Sound Test Standards).

3. The impeller shall be cast aluminum, radial blade, carefully balanced,and directly connected to the blower motor shaft.

C. Combustion Air Control

Combustion air damper and cam operated fuel metering valves shall be operated by a singledamper control motor that regulates the fire according to load demand. Single pointpositioning controls shall be provided to regulate operation of the damper control motor.

D. Fuel Specification and Piping

Refer to the following fuel series specifications:

• Fuel series 700 - gas fired.

• Fuel series 100 - light oil fired.

• Fuel series 200 - light oil or gas fired.

E. Fuel Series 700 - Gas Fired

1. Burner Type - The burner shall be integral with the front head of the boilerand of high radiantannular gas entry on 125-225 hp. and multi-port typegas entry on 100 hp. The burner shall be approved for operation onnatural gas fuel.

2. Gas Pilot - The gas pilot shall be a premix type with automatic electricignition. An electronic detector shall monitor the pilot so that the primarygas valve cannot open until pilot flame has been established. The pilottrain shall include two manual shut-off valves, solenoid valve, pressureregulator and pressure gauge.

3. Gas Burner Piping - Gas burner piping on all units shall include primarygas shutoff valve, motor operated with proof of closure switch andplugged leakage test connection. The valve is spring return to start orstop the gas burner and to close automatically in the event of powerfailure, flame failure, low water or any safety shutdown condition. Alubricating plug cock or butterfly shutoff valve shall be provided as ameans for a tightness check of the primary shut off valve. An additionalplug cock or butterfly shutoff valve shall be furnished at entrance to gastrain. Select one of the following:

• 100 hp High and low gas pressure switches shall be provided.

4. 125-225 hp High and low gas pressure switches shall be provided. Asecond motorized safety shutoff valve, plus an additional plugged leakagetest connection shall be provided.

5. Burner Turndown - Turndown range of the burner shall be 4:1 when firingnatural gas.

a. Fuel Series 100 - Light Oil Fired


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b. Burner Type - The burner shall be integral with the front head of theboiler, and shall be a low pressure air atomizing type approved foroperation with CS12-48, Commercial No. 2 oil.

c. Oil Pilot - The oil pilot shall be air atomizing type with automaticelectric ignition and include oil solenoid valve. An electronicdetector shall monitor the pilot so that the primary oil valve cannot

open until flame has been established.d. Oil Pump - An oil pump with a capacity of approximately twice the

maximum burning rate shall be included. A separate motor drivenpump set, shipped loose to be installed in a location favorable to theoil storage tank, shall be provided.

e. Oil Burner Piping - Fuel oil piping on the unit shall include oilpressure regulating devices, oil metering controls, solenoid shutoffvalves, pressure gauges and fuel strainer, all integrally mounted onthe unit. A fuel oil controller shall be provided to combine all of thefuel oil controls into a single casting which is mounted on the frontdoor of the unit. A single tip retractable nozzle shall be used for thelow pressure air atomizing burner. A low oil pressure switch shall be

included in the oil piping.f. Low Pressure Air Atomizing - Select one of the following:

• 100 hp. Separate air compressor module mounted on boiler base rail with lowatomizing air pressure switch shall be provided.

• 125 hp-225 hp. Belt driven air compressor, lubricating air tank, oil level indicator,inlet air filter, air pressure gauge, and low atomizing air pressure switch shall beprovided.

6. Burner Turndown - Turndown range of the burner shall be 4:1 when firingNo. 2 oil.

F. Fuel Series 200 - Light Oil or Gas Fired

1. Burner Type - The burner, integral with the front head of the boiler, shallbe a combination of the low pressure air atomizing type for oil and highradiant annular gas entry on 125-225 hp and multi-port type for gasentry on 100 hp. The burner shall be approved for operation with eitherCS12-48 Commercial No. 2 Oil or natural gas.

2. Gas Pilot - The gas pilot shall be premix type with automatic electricignition. An electronic detector shall monitor the pilot so that the primaryfuel valve cannot open until flame has been established. The pilot trainshall include two manual shut-off valves, solenoid valve, pressureregulator and pressure gauge.

3. Oil Burner

a. Oil Pump - An oil pump with a capacity of approximately twice the

maximum burning rate shall be included. A separate motor drivenpump set, shipped loose, to be installed in a location favorable tothe oil storage tank, shall be provided.


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b. Oil Burner Piping - Fuel oil piping on the unit shall include oilpressure regulating devices, oil metering controls, solenoid shutoffvalves, pressure gauges and fuel strainer, all integrally mounted onthe unit. A fuel oil controller shall be provided to combine all of thefuel oil controls into a single casting which is mounted on the frontdoor of the unit. A single tip retractable nozzle shall be used for the

low pressure air atomizing burner. A low oil pressure switch shall beincluded in the oil piping.

c. Low pressure Air Atomizing - Select one of the following:

• 100 hp. Separate air compressor module mounted on boiler base rail with lowatomizing air pressure switch shall be provided.

• 125-225 hp. Belt driven air compressor, lubricating air tank, oil level indicator, inletair filter, air pressure gauge and low atomizing air pressure switch shall be provided.

d. Gas Burner

1) Gas Burner Piping - gas burner piping on all units shall includeprimary gas shutoff valve, motor operated with proof of closureswitch and plugged leakage test connection. The valve is

spring return to start or stop the gas burner and to closeautomatically in the event of power failure, flame failure, lowwater or any safety shutdown condition. A lubricating plugcock or butterfly shutoff valve shall be provided as a means fora tightness check of the primary shut off valve. An additionalplug cock or butterfly shutoff valve shall be furnished atentrance to gas train. Select one of the following:

• 100 hp High and low gas pressure switches shall be provided.

• 125-225 hp High and low gas pressure switches shall be provided. A secondmotorized safety shutoff valve, plus an additional plugged leakage test connection shallbe provided.

e. Burner Turndown - Turndown range of the burner shall be 4:1.

G. Boiler Flame Safeguard Controller and Control Panel

1. CB780 Flame Safeguard Controller

Each boiler shall be factory equipped with flame safeguard controller providing technology andfunctions equal to the Cleaver-Brooks Model CB780.

Controller shall be computerized solid state having sequence and flame-on lights and digital“first out” fault code indications of flame safeguard trip functions. It shall include dynamicself-check logic. The controller shall have a fixed operating sequence incapable of beingmanually altered. The sequence shall include start, pre-purge, pilot and main fuel ignition runand post-purge cycles.

Controller shall be the non-recycle type for maximum safety that shall shutdown the burner

and indicate as a minimum the following trip functions: pilot and main flame failure, high andlow fire proving switch faults, running interlocks open, false flame signal and fuel valve open(when proof of closure switch is furnished).

The controller shall have a run/test switch. It shall allow interruptions to sequence just afterpre-purge, during pilot ignition trial and run cycles for adjustments to firing rate motor, damperlinkages and pilot flame for minimum turndown tests.

a. Control Panel - The control panel shall be mounted on the front doorof the boiler in a location convenient to the operator. The hinged


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metal cabinet will have NEMA 1A rating that includes a neoprenedust seal and a Yale cabinet key type lock.

The panel shall contain the boiler flame safeguard controller, blower motor starter, indicatinglights and selector switches.

The panel shall have a removable sub-base for mounting the flame safeguard controller,

blower motor starter, and terminal blocks. For combination gas-oil fired boilers, the panelshall contain the fuel selector switch.

b. Lights

•White - load demand.

•White - fuel valve open.

•Red - low water.

•Red - flame failure.

c. Control Switches

•Burner On-Off.

•Manual-Automatic.

•Manual Firing Rate Control.

d.Oil, heat and moisture resistant wire shall be used and identifiedwith circuit numbers corresponding to the electrical wiring diagram.

e. All electrical equipment and wiring shall be in conformance withUnderwriters Laboratories requirements.

f. Boiler to be supplied with a control circuit transformer and fuseprotection for the control circuit.

2. Control Panel

a. The control panel shall be mounted on the front door of the boiler ina location convenient to the operator. The hinged metal cabinet willhave NEMA 1A rating that includes a neoprene dust seal and a Yalecabinet key type lock.

b. The panel shall contain the boiler flame safeguard controller, blowermotor starter, indicating lights and selector switches.

c. Panel shall have a removable sub-base for mounting the flamesafeguard controller, blower motor starter, and terminal blocks. Forcombination gas-oil fired boilers the panel shall contain the fuelselector switch.

d. Oil, heat, and moisture resistant wire shall be used and identifiedwith circuit numbers corresponding to the electrical wiring diagram.

e. All electrical equipment and wiring shall be in conformance withUnderwriters Laboratories requirements.

f. Boiler to be supplied with a control circuit transformer and fuseprotection for the control circuit.

2.04 EFFICIENCY GUARANTEE

A. The boiler must be guaranteed to operate at a minimum fuel-to-steamefficiency of ____ percent from 25 to 100 percent of rating when burningnatural gas and ________ fuel-to-steam efficiency at 100% firing rate whenburning oil.


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2.05 WARRANTY

A. All equipment is to be guaranteed against defects in materials and/orworkmanship for a period of 12 months from date of start-up or 18 monthsfrom date of shipment, whichever comes first.

PART 3 EXECUTION

A. Shop TestsThe packaged boiler must receive factory tests to check the construction, controls, andoperation of the unit. All tests may be witnessed by the purchaser, if desired.

B. Start-up Service

1. After boiler installation is completed, the manufacturer shall provide theservices of a field representative for starting the unit and timing theoperator at no additional costs.

a. A factory approved and authorized start-up report shall be submittedto the customer/user at the time of start-up.

section a8 cb boilers

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