Boiler Book CBEX Elite 100-800 manual.pdf

Model CBEX Elite

100-800 HP

TABLE OF CONTENTS

FEATURES AND BENEFITS

PRODUCT OFFERING

DIMENSIONS AND RATINGS

PERFORMANCE DATA

ENGINEERING DATA

LIST OF TABLES

CBEX Steam Boiler Ratings CBEX Hot Water Boiler Ratings CBEX Elite Steam Boiler Dimensions 100-800 HP CBEX Elite Hot Water Boiler Dimensions 100-800 HP CBEX Fuel-to-Steam Efficiencies Natural Gas (with heat recovery) CBEX Fuel-to-Steam Efficiencies #2 Oil (with heat recovery) CBEX Natural Gas Estimated Emission Levels Predicted sound levels (30ppm systems) at high fire CBEX #2 Oil Estimated Emission Levels Safety valves steam Relief valves hot water CBEX Elite steam volume and disengaging area CBEX Elite recommended steam nozzle size CBEX Elite recommended Non-Return Valve size Required Gas Pressure at Entrance to C-B Supplied Regulator/Gas Valve; 30/60 ppm Required Gas Pressure at Entrance to C-B Supplied Regulator/Gas Valve; 9 ppm

100-800 HP CBEX Elite CBEX altitude correction for gas Boiler room width CBEX lifting lugs CBEX Elite boiler mounting piers Front Davit Support

CBEX Elite 100-800 HP

FEATURES AND BENEFITS

The CBEX Elite 100-800 HP Firetube boiler is designed, manufactured, and packaged by Cleaver-Brooks. 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, the following features apply to the CBEX.

Two Pass Design:

• The packaged boiler offers high efficiency, flexibility, reliability, safety and ease of operation.

Front and Rear Access:

• Provides access to front tube sheet and furnace.

• Large rear access plug for turnaround and furnace access.

Natural Gas, No. 2 Oil, or Combination Burners Available:

• Combination gas/oil burners provide quick fuel changeover without burner adjustment.

PRODUCT OFFERING

Burners are available to fire natural gas, No. 2 oil, or a combination of oil and gas.

Standard product offering for 100-800 HP CBEX boilers is:

• Two pass wetback design.

• 150, 200, or 250 psig steam

• 30 and 125 psig hot water

• Full modulation, all sizes.

Available options include the following (contact your local Cleaver-Brooks authorized representative for option details).

• Boiler Options:

Additional screwed or flanged tappings.

Blowdown valves.

Non-return valves.

Feedwater valves and regulators.

Surface blowdown systems.

Surge load baffles.

Seismic design.

• Burner/Control Options:

Flame safeguard controllers.

Lead/lag system.

Special insurance and code requirements (e.g., IRI, FM, NFPA8501).

Alarm bell/silence switch.

Special motor requirements (TEFC, high efficiency).

Special indicating lights.

Main disconnect.

Elapsed time meter.

NEMA enclosures.

Remote emergency shut-off (115V).

Circuit breakers.

Day/night controls.

Special power requirements.

Low NOx Equipment.

• Fuel Options:

Gas strainer.

Gas pressure gauge.

Future gas conversion.

Oversized/undersized gas trains.

Optional Oil Pumps.

DIMENSIONS AND RATINGS

Dimensions and ratings are shown in the following tables and illustrations.

NOTE: The following information is subject to change without notice.

Table 1 - CBEX steam boiler ratings

Table 2 - CBEX hot water boiler ratings

Figure 1 / Table 3 - CBEX steam boiler dimensions

Figure 2 / Table 4 - CBEX hot water boiler dimensions

Table 1. CBEX Steam Boiler Ratings

BOILER H.P. 100 125 150 200 250 300 350 400 500 600 700 800

RATINGS - SEA LEVEL TO 700 FT.

Rated Capacity (lbs-steam/hr from and at 212 0F)

3450 4313 5175 6900 8625 10350 12075 13800 17250 20700 24150 27600

Btu Output (1000 Btu/hr) 3348 4184 5021 6695 8369 10043 11716 13390 16738 20085 23433 26780

APPROXIMATE FUEL CONSUMPTION AT RATED CAPACITY BASED ON NOMINAL 82% EFFICIENCY

Light Oil gph (140,000 Btu/gal) 29.2 36.4 43.7 58.3 72.9 87.5 102.1 116.6 145.8 175.0 204.1 233.3

Gas CFH (1000 Btu) 4082 5103 6123 8165 10206 12247 14288 16329 20412 24494 28576 32659

Gas (Therm/hr) 40.8 51.0 61.2 81.6 102.1 122.5 142.9 163.3 204.1 244.9 285.8 326.6

POWER REQUIREMENTS - SEA LEVEL TO 700 FT. (60 HZ)

Blower Motor hp (60 ppm)A 7-1/2 7-1/2 5 20 7-1/2 15 15 15 30 40 40 60

Blower Motor hp (30 ppm)A 7-1/2 7-1/2 7-1/2 20 15 20 15 20 30 50 40 75

Blower Motor hp (9 ppm)A 5 7-1/2 7-1/2 15 15 20 15 25 30 50 75 n/a

Oil Pump Motor, No. 2 Oil 1/3 1/2 1/2 1/2 1/2 3/4 3/4 3/4 3/4 3/4 1 1

Air Compressor Motor hp (No. 2 Oil firing Only)

3 3 3 3 5 5 5 5 7-1/2 7-1/2 7-1/2 7-1/2

BOILER DATA

Heating Surface sq-ft. (Fireside) 417 485 563 750 879 922 1205 1521 1768 1905 2404 2481

NOTES:

A. Blower motor size for boiler operating pressures 125 psig and less, contact your local Cleaver-Brooks authorized representative for higher pressures and altitude.

Table 2. CBEX Hot Water Boiler Ratings

BOILER H.P. 100 125 150 200 250 300 350 400 500 600 700 800

RATINGS - SEA LEVEL TO 700 FT.

Btu Output (1000 Btu/hr) 3348 4184 5021 6695 8369 10043 11716 13390 16738 20085 23433 26780

APPROXIMATE FUEL CONSUMPTION AT RATED CAPACITY BASED ON NOMINAL 85% EFFICIENCY

Light Oil gph (140,000 Btu/gal) 28.1 35.2 42.2 56.3 70.3 84.4 98.4 112.5 140.6 168.8 196.9 225.0

Gas CFH (1000 Btu) 3938 4923 5907 7876 9846 11815 13784 15753 19691 23629 27568 31506

Gas (Therm/hr) 39.4 49.2 59.1 78.8 98.5 118.1 137.8 157.5 196.9 236.3 275.7 315.1

POWER REQUIREMENTS - SEA LEVEL TO 700 FT. (60 HZ)

Blower Motor hp (60 ppm)A 7-1/2 7-1/2 5 20 7-1/2 15 15 15 30 40 40 60

Blower Motor hp (30 ppm)A 7-1/2 7-1/2 7-1/2 20 15 20 15 20 30 50 40 75

Blower Motor hp (9 ppm)A 5 7-1/2 7-1/2 15 15 20 15 25 30 50 75 n/a

Oil Pump Motor, No. 2 Oil 1/3 1/2 1/2 1/2 1/2 3/4 3/4 3/4 3/4 3/4 1 1

Air Compressor Motor hp (No. 2 Oil firing Only)

3 3 3 3 5 5 5 5 7-1/2 7-1/2 7-1/2 7-1/2

BOILER DATA

Heating Surface sq-ft. (Fireside) 417 485 563 750 879 922 1205 1521 1768 1905 2404 2481

Figure 1. CBEX Elite Steam Boiler Dimensions, 100-800 HP

Table 3. CBEX Elite Steam Boiler Dimensions 100-800 HP

BOILER H.P. DIM 100 125 150 200 250 300 350 400 500 600 700 800

LENGTHS

Overall Length (60 PPM system) A 165 172 176.5 201.5 231.5 242.5 249 265 260.5 282.5 291 299

Overall Length (30 PPM system) A 167 176 180.5 203.5 233.5 243.5 255 268 271.5 287.5 298 307

Overall Length (9 PPM system) A 167 176 182.5 205.5 233.5 243.5 255 270 271.5 288.5 300 n/a

Shell B 137.25 144.25 149 168 196 204 217.5 226.5 229 244 253 260

Base Frame C 129.5 136.5 140 159 186 194 208.5 217.5 219.5 234.5 243.5 250.5

Front Head Extension (60 PPM system) D 21.5 21.5 21.5 27.5 29.5 32.5 25.5 32.5 25.5 32.5 32 33

Front Head Extension (30 PPM system) D 23.5 25.5 25.5 29.5 31.5 33.5 31.5 35.5 36.5 37.5 39 41

Front Head Extension (9 PPM system) D 23.5 25.5 27.5 31.5 31.5 33.5 31.5 37.5 36.5 38.5 41 n/a

Front Ring Flange to Panel E 46 46 48 48 47 47 57 57 52 52 52 52

Rear Ring Flange to Base F 7.75 7.75 9 9 10 10 9 9 9.5 9.5 9.5 9.5

Shell Flange to Steam Nozzle G 62.5 66 73.5 75.5 96.5 100.5 106.5 111 114.5 122 126.5 130

WIDTHS

Overall Width H 81 81 86 86 94 94 105 105 112 112 119 119

I.D. Boiler J 55 55 60 60 67 67 78 78 85 85 92 92

Center to Water Column K 42.5 42.5 45 45 48.5 48.5 54 54 57.5 57.5 61 61

Center to Panel L 44.5 44.5 47 47 50.5 50.5 56 56 59.5 59.5 63 63

Center to Lagging M 30.5 30.5 33 33 36.5 36.5 42 42 45.5 45.5 49 49

Center to Auxiliary LWCO N 36.5 36.5 39 39 43.5 43.5 49 49 52.5 52.5 56 56

Base Outside O 47.5 47.5 52.5 52.5 51 51 64 64 60 60 68 68

Base Inside P 39.5 39.5 44.5 44.5 43 43 56 56 47 47 55 55

HEIGHTS

Overall Height Q 81.5 81.5 87 87 101.5 101.5 113 113 122 122 130 130

Base to Vent Outlet R 81 81 87 87 94.5 94.5 108 108 114.5 114.5 122.5 122.5

Base to Boiler Centerline S 41 41 46 46 50 50 56.5 56.5 61 61 65.5 65.5

Height of Base Frame T 12 12 12 12 12 12 12 12 12 12 12 12

Base to Bottom of Panel U 17 17 17 17 20 20 24 24 23 23 23 23

Base to Steam Outlet V 78.5 78.5 82.5 82.5 90 90 102 102 110 110 118 118

FARSIDE

NOTES:

Accompanying dimensions, while sufficiently accurate for layout purposes, must be confirmed for construction by certified dimension diagram/drawing. All connections are threaded unless otherwise indicated.

BOILER CONNECTIONS

Feedwater Inlet (Both Sides) BB 1.25 1.5 1.5 2 2 2 2.5 2.5 2.5 2.5 2.5 2.5

Surface Blowoff CC 1 1 1 1 1 1 1 1 1 1 1 1

Steam Nozzle (300# ANSI Flange) DD 4 4 4 4 6 6 6 6 8 8 8 8

Blowdown-Front & Rear EE 1.25 1.5 1.5 1.5 1.5 1.5 1.5 2 2 2 2 2

Chemical Feed FF 1 1 1 1 1 1 1 1 1 1 1 1

VENT STACK

Vent Stack Diameter (Flanged) AA 16 16 16 16 20 20 24 24 24 24 24 24

MINIMUM CLEARANCES

Front Door Swing W 62 62 67 67 78 78 89 89 97 97 104 104

Tube Removal - Front Only X 89 96 101 120 142 142 160 169 172 187 196 203

MINIMUM BOILER ROOM LENGTH ALLOWING FOR DOOR SWING AND TUBE REMOVAL:

Thru Window or Door 235.5 242.5 252 271 310 318 342.5 351.5 362 377 393 400

Front of Boiler 262.5 276.5 286 324 374 382 413.5 431.5 437 467 485 499

WEIGHTS IN LBS

Normal Water Weight 6,550 6,890 8,010 9,060 11,620 12,190 19,340 19,650 20,060 21,620 25,050 25,870

Approx. Shipping Weight - (150psig) 10,650 11,180 12,520 13,900 17,960 18,540 23,970 24,710 29,300 30,900 38,500 39,450

Table 3. CBEX Elite Steam Boiler Dimensions 100-800 HP (Continued)

Figure 2. CBEX Elite Hot Water Boiler Dimensions, 100-800 HP

Table 4. CBEX Elite Hot Water Boiler Dimensions 100-800 HP

BOILER H.P. DIM 100 125 150 200 250 300 350 400 500 600 700 800

LENGTHS

Overall Length (60 PPM system) A 165 172 176.5 201.5 231.5 242.5 249 265 260.5 282.5 291 299

Overall Length (30 PPM system) A 167 176 180.5 203.5 233.5 243.5 255 268 271.5 287.5 298 307

Overall Length (9 PPM system) A 167 176 182.5 205.5 233.5 243.5 255 270 271.5 288.5 300 n/a

Shell B 137.25 144.25 149 168 196 204 217.5 226.5 229 244 253 260

Base Frame C 129.5 136.5 140 159 186 194 208.5 217.5 219.5 234.5 243.5 250.5

Front Head Extension (60 PPM system) D 21.5 21.5 21.5 27.5 29.5 32.5 25.5 32.5 25.5 32.5 32 33

Front Head Extension (30 PPM system) D 23.5 25.5 25.5 29.5 31.5 33.5 31.5 35.5 36.5 37.5 39 41

Front Head Extension (9 PPM system) D 23.5 25.5 27.5 31.5 31.5 33.5 31.5 37.5 36.5 38.5 41 n/a

Front Ring Flange to Panel E 46 46 48 48 47 47 57 57 52 52 52 52

Rear Ring Flange to Base F 7.75 7.75 9 9 10 10 9 9 9.5 9.5 9.5 9.5

Shell Flange to Water Return G 93.5 100.5 105 124 150.5 158.5 172 181 173.5 188.5 197.5 204.5

Shell Flange to Water Outlet H 118.5 125.5 130 149 176.5 184.5 198 207 209.5 224.5 233.5 240.5

WIDTHS

Overall Width J 75 75 80 80 87 87 98 98 105 105 112 112

I.D. Boiler K 55 55 60 60 67 67 78 78 85 85 92 92

Center to Panel L 44.5 44.5 47 47 50.5 50.5 56 56 59.5 59.5 63 63

Center to Lagging M 30.5 30.5 33 33 36.5 36.5 42 42 45.5 45.5 49 49

Base Outside O 47.5 47.5 52.5 52.5 51 51 64 64 60 60 68 68

Base Inside P 39.5 39.5 44.5 44.5 43 43 56 56 47 47 55 55

HEIGHTS

Overall Height Q 81.5 81.5 87 87 101.5 101.5 113 113 122 122 130 130

Base to Vent Outlet R 81 81 87 87 94.5 94.5 108 108 114.5 114.5 122.5 122.5

Base to Boiler Centerline S 41 41 46 46 50 50 56.5 56.5 61 61 65.5 65.5

Height of Base Frame T 12 12 12 12 12 12 12 12 12 12 12 12

Base to Bottom of Panel U 17 17 17 17 20 20 24 24 23 23 23 23

Base to Water Return & Outlet V 78.5 78.5 82.5 82.5 90 90 102 102 110 110 118 118

BOILER CONNECTIONS

Water Fill (Both Sides) BB 1.25 1.5 1.5 2 2 2 2.5 2.5 2.5 2.5 2.5 2.5

Water Return (150# ANSI Flange) CC 4 6 6 6 8 8 8 10 10 12 12 12

Water Outlet (150# ANSI Flange w/Dip Tube) DD 4 6 6 6 8 8 8 10 10 12 12 12

Drain-Front & Rear EE 1.5 1.5 1.5 2 2 2 2 2 2 2 2 2

Air Vent FF 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 2 2 2 2

VENT STACK

Vent Stack Diameter (Flanged) AA 16 16 16 16 20 20 24 24 24 24 24 24

MINIMUM CLEARANCES

Front Door Swing W 62 62 67 67 78 78 89 89 97 97 104 104

Tube Removal - Front Only X 89 96 101 120 142 142 160 169 172 187 196 203

MINIMUM BOILER ROOM LENGTH ALLOWING FOR DOOR SWING AND TUBE REMOVAL:

Thru Window or Door 235.5 242.5 252 271 310 318 342.5 351.5 362 377 393 400

Front of Boiler 262.5 276.5 286 324 374 382 413.5 431.5 437 467 485 499

WEIGHTS IN LBS

Normal Water Weight 7,270 7,640 9,200 10,400 14,300 14,970 22,950 23,400 25,950 27,880 33,000 34,000

Approx. Shipping Weight - (30 psig) 9,040 9,510 10,630 11,950 14,900 15,670 20,100 21,420 25,100 26,400 31,350 32,130

Approx. Shipping Weight - (125 psig) 9,900 10,550 12,400 14,150 17,950 18,850 25,000 25,400 31,400 32,950 39,400 40,400

NOTES:

Accompanying dimensions, while sufficiently accurate for layout purposes, must be confirmed for construction by certified dimension diagram/drawing.

All Connections are Threaded Unless Otherwise Indicated:

Table 4. CBEX Elite Hot Water Boiler Dimensions 100-800 HP (Continued)

PERFORMANCE DATA

Efficiency Tables 5 and 6 show predicted fuel-to-steam efficiencies (including radiation and convection losses) for CBEX Elite boilers (30 ppm). For specific efficiencies on firetube boiler offerings not listed here, contact your local Cleaver-Brooks authorized representative.

Cleaver-Brooks offers an industry leading fuel-to-steam boiler efficiency guarantee for CBEX Firetube Boilers.

The guarantee is based on the fuel-to-steam efficiencies shown in the efficiency tables and the following conditions. The efficiency percent number is only meaningful if the specific conditions of the efficiency calculations are clearly stated in the specification (see Cleaver-Brooks publication CB-7767 for a detailed description of efficiency calculations).

The boiler manufacturer shall guarantee that, at the time of startup, the boiler will achieve fuel-to-steam efficiency (as shown in the tables listed above) at 100% firing rate (add efficiency guarantees at 25%, 50%, and 75% of rating, if required). If the boiler(s) fail to achieve the corresponding guaranteed efficiency as published, the boiler manufacturer will rebate, to the ultimate boiler owner, ten thousand dollars ($10,000) for every full efficiency point (1.0%) that the actual efficiency is below the guaranteed level. The specified boiler efficiency is based on the following conditions.

1. Fuel specification used to determine boiler efficiency:

2. Efficiencies are based on ambient air temperature of 80 °F, relative humidity of 30%, and 15% excess air in the exhaust flue gas.

3. Efficiencies are based on the following radiation and convection losses. Firing rate of 25% - 1.2%, 50% - 0.6%, 75%

- 0.4%, and 100% - 0.3%.

Table 5. CBEX Fuel-to-Steam Efficiencies Nat. Gas

BHP OPERATING PRESSURE = 125 psig

% OF LOAD

25% 50% 75% 100%

100 82.5 82.4 81.9 81.4

125 82.7 82.7 82.5 82.1

150 82.7 82.7 82.5 82.1

200 82.8 83.0 82.9 82.7

250 82.5 82.4 81.9 81.4

300 82.5 82.4 82.0 81.5

350 82.6 82.6 82.3 81.9

400 83.0 82.8 82.5 82.0

500 83.1 82.9 82.6 82.2

600 83.1 83.0 82.7 82.4

700 83.2 83.1 82.9 82.6

800 83.1 83.1 82.8 82.6

• Natural Gas

Carbon,% (wt) = 69.98 Hydrogen,% (wt) = 22.31 Sulfur,% (wt) = 0.0 Heating value, Btu/lb = 21,830

• No. 2 Oil

Carbon,% (wt) = 85.8 Hydrogen,% (wt) = 12.7 Sulfur,% (wt) = 0.2 Heating value, Btu/lb = 19,420

Table 6. CBEX Fuel-to-Steam Efficiencies #2 Oil

BHP OPERATING PRESSURE = 125 psig

% OF LOAD

25% 50% 75% 100%

100 85.8 85.7 85.3 84.7

125 86.0 86.1 85.8 85.4

150 86.0 86.1 85.8 85.4

200 86.1 86.3 86.2 86.0

250 85.8 85.7 85.2 84.7

300 85.8 85.7 85.3 84.8

350 85.9 85.9 85.6 85.2

400 86.3 86.2 85.8 85.3

500 86.4 86.2 85.9 85.5

600 86.4 86.3 86.0 85.7

700 86.5 86.4 86.2 85.9

800 86.5 86.4 86.2 85.9

Emissions

Table 6. CBEX Natural Gas Estimated Emission Levels

POLLUTANT UNITS 60 PPM

SYSTEM

30 PPM

SYSTEM

9 PPM

SYSTEM

7 PPM

SYSTEM

CO ppmA 10B 10B 25 50 lb/MMBtu 0.0075 0.0075 0.018 0.037

NOx ppmA 60 30 9 7 lb/MMBtu 0.07 0.035 0.0105 0.0082

SOx ppmA 1 1 1 1 lb/MMBtu 0.001 0.001 0.001 0.001

HC/VOC5 ppmA 8 8 4 4 lb/MMBtu 0.0032 0.0032 0.0016 0.0016

PM ppmA - - - -lb/MMBtu 0.01 0.01 0.01 0.01

A. ppm levels are given on a dry volume basis and corrected to 3% oxy-gen (15% excess air) B. 50 ppm CO at low fire up to 300 HP and 10 ppm CO at low fire 350 HP and above

Table 8. Predicted sound levels (30ppm systems) at high fire

BHP Sound Level-dbA

100 79

125 83

150 83

200 84

250 83

300 84

350 84

400 85

500 85

600 87

700 88

800 90

Table 7. CBEX #2 Oil Estimated Emission Levels

POLLUTANT UNITS 60 PPM

SYSTEM

30 PPM

SYSTEM

9 PPM

SYSTEM

7 PPM

SYSTEM

CO ppmA 10 10 10 10 lb/MMBtu 0.008 0.008 0.008 0.008

NOx ppmA 120 90 70 70 lb/MMBtu 0.16 0.12 0.093 0.093

SOx ppmA 55 55 55 55 lb/MMBtu 0.1 0.1 0.1 0.1

HC/VOC5 ppmA 4 4 4 4 lb/MMBtu 0.002 0.002 0.002 0.002

PM ppmA - - - -lb/MMBtu 0.025 0.025 0.025 0.025

A. ppm levels are given on a dry volume basis and corrected to 3% oxygen (15% excess air)

BASED ON THE FOLLOWING CONSTITUENT LEVELS:

Fuel-bound Nitrogen content = 0.015% or less by weight.

Sulfur content = 0.1% by weight.

Ash content = 0.01% by weight.

ENGINEERING DATA

The following engineering information is provided for CBEX Boilers. Additional detail is available from your local Cleaver-Brooks authorized representative.

Boiler Information

Tables 9 and 10 list quantity and outlet size for safety/relief valves supplied on CBEX boilers.

Table 11 shows steam volume and disengaging area.

Table 12 gives recommended steam nozzle sizes.

Table 13 shows recommended non-return valve sizes.

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

NOTE: Relief valve is Kunkle #537 for 30# & 125#(Section IV) boiler and is Kunkle #927 for 150# HTHW(Section I) boiler.

Table 9. Safety valves steam

VALVE

SETTING

150 PSIG STEAM 200 PSIG STEAM 250 PSIG STEAM

BOILER HP

NO. OF

VALVES

REQ'D

OUTLET SIZE

NO. OF

VALVES

REQ'D

OUTLET SIZE

NO. OF

VALVES

REQ'D

OUTLET SIZE

100 1 1-1/2" 1 1-1/2" 1 1-1/4" 125 2 1-1/4" 2 (1) 1-1/4" (1) 1" 2 1" 150 2 (1) 1-1/2" (1) 1-1/4" 2 (1) 1-1/4" (1) 1" 2 1" 200 2 1-1/2" 2 (1) 1-1/2" (1) 1-1/4" 2 1-1/4" 250 2 (1) 2" (1) 1-1/2" 2 (1) 1-1/2" (1) 1-1/4" 2 (1) 1-1/2" (1) 1-1/4" 300 2 (1) 2" (1) 1-1/2" 2 1-1/2" 2 (1) 1-1/2" (1) 1-1/4" 350 2 2" 2 (1) 2" (1) 1-1/2" 2 1-1/2" 400 2 (1) 2-1/2" (1) 2" 2 (1) 2" (1) 1-1/2" 2 (1) 2" (1) 1-1/2" 500 2 (1) 2-1/2" (1) 2" 2 (1) 2-1/2" (1) 2" 2 (1) 2" (1) 1-1/2" 600 2 2-1/2" 2 (1) 2-1/2" (1) 2" 2 2"

700, 800 3 (2) 2-1/2" (1) 2" 2 2-1/2" 2 (1) 2-1/2" (1) 2"

Table 10. Relief valves hot water

VALVE SETTING 30 PSIG HW 125 PSIG HW

BOILER HP

NO. OF

VALVES REQ'D OUTLET SIZE

NO. OF

VALVES REQ'D OUTLET SIZE

100 1 2-1/2 1 1-1/4 125 1 2-1/2 1 1-1/4 150 1 2-1/2 1 2 200 2 (1) 2-1/2 (1) 1-1/4 1 2 250 2 (1) 2 (1) 2-1/2 1 2 300 2 2-1/2 1 2-1/2 350 3 (2) 2-1/2 (1) 1 1 2-1/2 400 3 (1) 2 (2) 2-1/2 1 2-1/2 500 4 (1) 1 (3) 2-1/2 2 (1) 1 (1) 2-1/2 600 4 (3) 2-1/2 (1) 2 2 (1) 1-1/4 (1) 2-1/2

700, 800 5 (1) 1 (4) 2-1/2 2 (1) 2-1/2 (1) 2

Table 11. CBEX Elite steam volume and disengaging area

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

100 10.2 4291

125 10.7 4522

150 17.6 5544

200 20.1 6322

250 34.3 8597

300 35.8 8971

350 50.7 11059

400 53.0 11563

500 78.9 13550

600 84.5 14515

700 107.2 16517

800 110.3 17006

NOTE:

Based on normal water level.

Based on 150 psig design pressure.

Table 12. CBEX Elite recommended steam nozzle size

OPERATING

PRESSURE

PSIG

BOILER HP

100 125 150 200 250 300 350 400 500 600 700 800

50 4 6 6 6 6 8 8 8 8 10 10 12

75 4 4 4 6 6 6 8 8 8 8 10 10

100 4 4 4 6 6 6 6 6 8 8 8 10

125 4 4 4 4 6 6 6 6 8 8 8 8

150 2.5 3 3 4 4 6 6 6 6 6 8 8

200 2.5 2.5 3 4 4 4 4 6 6 6 6 6

250 2 2.5 2.5 3 4 4 4 4 6 6 6 6

NOTES:

1. Steam nozzle sizes given in inches.

2. Recommended steam nozzle sizes based on 4000 to 5000 fpm steam velocity.

NOTE: Valve sizes (300 psig flanges) given in inches.

Blowdown Water Requirements

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

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

Table 14 lists the approximate quantity of water represented by 4 inches of water at normal operating level for Cleaver-Brooks CBEX Boilers.

NOTE: Quantity of water removed from boiler by lowering normal water line 4".

Table 13. CBEX Elite recommended Non-Return Valve size

BOILER HP

BOILER

CAPACITY

(LBS/HR)

OPERATING PRESSURE (PSIG)

50 75 100 125 150 175 200 250

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

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

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

200 6900 3 3 3 3 3 2-1/2 2-1/2 2-1/2

250 8625 4 3 3 3 3 3 3 3

300 10350 4 4 4 3 3 3 3 3

350 12025 4 4 4 4 4 3 3 3

400 13800 5 4 4 4 4 4 4 3

500 17210 6 5 5 4 4 4 4 4

600 20700 6 6 5 5 5 4 4 4

700 24150 6 6 6 5 5 5 5 4

800 27600 6 6 6 6 6 5 5 5

Table 14: Blowdown tank sizing

BOILER HP WATER (GAL)

100 84

125 89

150 106

200 120

250 161

300 167

350 205

400 214

500 247

600 264

700 300

800 309

Burner Characteristics Note that altitude correction and burner changes are required for higher altitudes which may alter dimensions, motor hp and gas pressures. Also 50 Hz applications and low NOx options should be reviewed by the Cleaver- Brooks authorized representative.

Fuel Connections - Gas

The local gas company should be consulted for requirements and authorization for installation and inspection of gas supply piping. Installation of gas supply piping and venting must be in accordance with all applicable engineering guidelines and regulatory codes. All connections made to the boiler should be arranged so that all components remain accessible for inspection, cleaning and maintenance.

A drip leg should be installed in the supply piping before the connection to the gas pressure regulator. The drip leg should be at least as large as the inlet fitting supplied with the boiler. Consideration must be given to both volume and pressure requirements when choosing gas supply piping size. Refer to the boiler dimension diagram provided by Cleaver-Brooks for the particular installation. Connections to the burner gas train should be made with a union, so that gas train components or the burner may be easily disconnected for inspection or service.

Upon completion of the gas piping installation, the system should be checked for gas leakage and tight shutoff of all valves.

Fuel Connections - Oil

Oil-fired burners are equipped with an oil pump, which draws fuel from a storage tank and supplies pressurized oil to the burner nozzle(s). The burner supply oil pump has a greater capacity than the burner requires for the maximum firing rate. Fuel not delivered to the nozzle is returned to the storage tank. A two-pipe (supply and return) oil system is recommended for all installations. Oil lines must be sized for the burner and burner supply oil pump capacities.

The burner supply oil pump suction should not exceed 10" Hg. If a transfer pump is used, it must have a pumping capacity at least equal to that of the burner pump(s). Supply pressure to the burner pump should not exceed 3 psig.

A strainer must be installed in the supply piping upstream of the burner supply pump in order to prevent entry of foreign material into the pump, fuel control valves, or burner nozzle(s). The strainer must be sized for the burner supply pump capacity. A strainer mesh of 150 microns (0.005") is recommended.

Install a check valve in the line to prevent draining of the oil suction line when the burner is not in operation.

Location of the check valve varies with the system, but usually it is located as close as possible to the storage tank.

Installation of a vacuum gauge in the burner supply line between the burner oil pump and the strainer is recommended. Regular observation and recording of the gauge indication will assist in determining when the strainer needs servicing.

Upon completion of the oil piping installation, the system should be checked for oil or air leakage and tight shutoff of all valves.

*BB = Butterball; PC = Plug Cock

Note: For undersized or oversized gas trains or altitudes above 700 feet, contact your local Cleaver-Brooks representative.

Table 15. Required Gas Pressure at Entrance to C-B Supplied Regulator/Gas Valve; 30/60 ppm

BOILER

HP

GAS TRAIN

SIZE

UPSTREAM

VALVE*

DOWN-

STREAM*

30 ppm 60 ppm BOILER

HP

GAS TRAIN

SIZE

UPSTREAM

VALVE

DOWN-

STREAM

30 ppm 60 ppm

100 HP 1.5 in BB BB 0.7 - 3.1 psi 0.7 - 3.1 psi 350 HP 1.5 in - 2.0 in BB BB 3.6 - 5.0 psi 3.6 - 5.0 psi 100 HP 1.5 in PC PC 0.7 - 2.9 psi 0.7 - 2.9 psi 350 HP 1.5 in - 2.0 in PC PC 4.0 - 5.0 psi 4.0 - 5.0 psi 100 HP 2.0 in BB BB 0.5 - 0.7 psi 0.5 - 0.7 psi 350 HP 2.0 in BB BB 2.7 - 3.6 psi 2.6 - 3.6 psi 100 HP 2.0 in PC PC 0.5 - 0.7 psi 0.5 - 0.7 psi 350 HP 2.0 in PC PC 2.8 - 4.0 psi 2.8 - 4.0 psi 100 HP 2.5 in PC PC 0.4 - 0.5 psi 0.4 - 0.5 psi 350 HP 2.5 in PC PC 1.6 - 2.7 psi 1.5 - 2.6 psi 100 HP 3.0 in PC PC 0.4 - 0.4 psi 0.4 - 0.4 psi 350 HP 3.0 in PC PC 1.2 - 1.6 psi 1.1 - 1.5 psi 100 HP 4.0 in PC PC 0.4 - 0.4 psi 0.4 - 0.4 psi 350 HP 4.0 in PC PC 1.0 - 1.2 psi 0.9 - 1.1 psi

125 HP 1.5 in BB BB 0.9 - 4.4 psi 0.9 - 4.7 psi 400 HP 1.5 in - 2.0 in BB BB 4.6 - 5.0 psi 4.6 - 5.0 psi 125 HP 1.5 in PC PC 1.0 - 4.2 psi 1.0 - 4.4 psi 400 HP 1.5 in - 2.0 in PC PC 5.1 - 7.7 psi 5.2 - 7.8 psi 125 HP 2.0 in BB BB 0.8 - 0.9 psi 0.7 - 0.9 psi 400 HP 2.0 in BB BB 3.2 - 4.6 psi 3.2 - 4.6 psi 125 HP 2.0 in PC PC 0.8 - 1.0 psi 0.7 - 1.0 psi 400 HP 2.0 in PC PC 3.4 - 5.0 psi 3.4 - 5.0 psi 125 HP 2.5 in PC PC 0.6 - 0.8 psi 0.6 - 0.7 psi 400 HP 2.0 in - 2.5 in BB PC 3.0 - 3.2 psi 3.0 - 3.2 psi 125 HP 3.0 in PC PC 0.6 - 0.6 psi 0.5 - 0.6 psi 400 HP 2.0 in - 2.5 in PC PC 3.1 - 3.4 psi 3.1 - 3.4 psi 125 HP 4.0 in PC PC 0.5 - 0.6 psi 0.5 - 0.5 psi 400 HP 2.5 in PC PC 1.8 - 3.0 psi 1.9 - 3.0 psi

400 HP 3.0 in PC PC 1.4 - 1.8 psi 1.4 - 1.9 psi 150 HP 1.5 in BB BB 1.2 - 5.0 psi 1.2 - 5.0 psi 400 HP 4.0 in PC PC 1.1 - 1.4 psi 1.1 - 1.4 psi 150 HP 1.5 in PC PC 1.3 - 5.0 psi 1.3 - 5.0 psi 150 HP 2.0 in BB BB 0.9 - 1.2 psi 0.9 - 1.2 psi 500 HP 2.0 in - 2.5 in BB PC 4.5 - 5.0 psi 4.6 - 5.0 psi 150 HP 2.0 in PC PC 0.9 - 1.3 psi 0.9 - 1.3 psi 500 HP 2.0 in - 2.5 in PC PC 4.7 - 5.0 psi 4.7 - 5.0 psi 150 HP 2.5 in PC PC 0.7 - 0.9 psi 0.7 - 0.9 psi 500 HP 2.5 in PC PC 2.7 - 4.5 psi 2.7 - 4.6 psi 150 HP 3.0 in PC PC 0.7 - 0.7 psi 0.7 - 0.7 psi 500 HP 3.0 in PC PC 2.0 - 2.7 psi 2.0 - 2.7 psi 150 HP 4.0 in PC PC 0.6 - 0.7 psi 0.6 - 0.7 psi 500 HP 4.0 in PC PC 1.5 - 2.0 psi 1.6 - 2.0 psi

200 HP 1.5 in BB BB 2.0 - 5.0 psi 1.9 - 5.0 psi 600 HP 2.0 in - 2.5 in BB PC 6.4 - 9.7 psi 6.4 - 9.5 psi 200 HP 1.5 in PC PC 2.2 - 5.0 psi 2.1 - 5.0 psi 600 HP 2.0 in - 2.5 in PC PC 6.7 - 10.0 psi 6.6 - 9.9 psi 200 HP 2.0 in BB BB 1.5 - 2.0 psi 1.4 - 1.9 psi 600 HP 2.0 in - 3.0 in BB PC 6.2 - 6.4 psi 6.1 - 6.4 psi 200 HP 2.0 in PC PC 1.5 - 2.2 psi 1.5 - 2.1 psi 600 HP 2.0 in - 3.0 in PC PC 6.4 - 6.7 psi 6.3 - 6.6 psi 200 HP 2.5 in PC PC 1.1 - 1.5 psi 1.1 - 1.4 psi 600 HP 2.5 in PC PC 3.8 - 5.0 psi 3.7 - 5.0 psi 200 HP 3.0 in PC PC 1.0 - 1.1 psi 1.0 - 1.1 psi 600 HP 2.5 in - 3.0 in PC PC 3.6 - 3.8 psi 3.5 - 3.7 psi 200 HP 4.0 in PC PC 0.9 - 1.0 psi 0.9 - 1.0 psi 600 HP 3.0 in PC PC 2.7 - 3.6 psi 2.6 - 3.5 psi

600 HP 4.0 in PC PC 2.1 - 2.7 psi 2.0 - 2.6 psi 250 HP 1.5 in BB BB 2.3 - 2.6 psi 2.4 - 2.7 psi 250 HP 1.5 in PC PC 2.6 - 2.7 psi 2.8 - 2.8 psi 700 HP 2.0 in - 3.0 in BB PC 8.5 - 12.8 psi 8.5 - 12.8 psi 250 HP 2.0 in BB BB 1.5 - 2.3 psi 1.6 - 2.4 psi 700 HP 2.0 in - 3.0 in PC PC 8.8 - 13.2 psi 8.8 - 13.2 psi 250 HP 2.0 in PC PC 1.6 - 2.6 psi 1.7 - 2.8 psi 700 HP 2.5 in - 3.0 in PC PC 4.6 - 5.0 psi 4.6 - 5.0 psi 250 HP 2.5 in PC PC 1.0 - 1.5 psi 1.1 - 1.6 psi 700 HP 3.0 in PC PC 3.4 - 4.6 psi 3.4 - 4.6 psi 250 HP 3.0 in PC PC 0.8 - 1.0 psi 1.0 - 1.1 psi 700 HP 4.0 in PC PC 2.6 - 3.4 psi 2.6 - 3.4 psi 250 HP 4.0 in PC PC 0.7 - 0.8 psi 0.9 - 1.0 psi

800 HP 2.0 in - 3.0 in BB PC 10.5 - 15.0 psi 10.5 - 15.0 psi 300 HP 1.5 in - 2.0 in BB BB 2.9 - 3.4 psi 2.9 - 3.5 psi 800 HP 2.0 in - 3.0 in PC PC 10.9 - 15.0 psi 10.9 - 15.0 psi 300 HP 1.5 in - 2.0 in PC PC 3.2 - 3.4 psi 3.2 - 3.5 psi 800 HP 2.5 in - 3.0 in PC PC 5.8 - 10.0 psi 5.8 - 10.0 psi 300 HP 2.0 in BB BB 1.9 - 2.9 psi 2.0 - 2.9 psi 800 HP 3.0 in PC PC 4.5 - 5.0 psi 4.5 - 5.0 psi 300 HP 2.0 in PC PC 2.0 - 3.2 psi 2.1 - 3.2 psi 800 HP 4.0 in PC PC 3.2 - 4.5 psi 3.2 - 4.5 psi 300 HP 2.5 in PC PC 1.4 - 1.9 psi 1.5 - 2.0 psi 300 HP 3.0 in PC PC 1.1 - 1.4 psi 1.2 - 1.5 psi 300 HP 4.0 in PC PC 0.9 - 1.1 psi 1.0 - 1.2 psi

Standard Gas Train size is highlighted rs.

Table 16. Required Gas Pressure at Entrance to C-B Supplied Regulator/Gas Valve; 9 ppm

*BB = Butterball; PC = Plug Cock

Note: For undersized or oversized gas trains or altitudes above 700 feet, contact your local Cleaver-Brooks representative.

BOILER

HP

GAS TRAIN SIZE UPSTREAM

VALVE*

DOWNSTREAM

VALVE*

PRESSURE BOILER

HP

GAS TRAIN SIZE UPSTREAM

VALVE*

DOWNSTREAM

VALVE*

PRESSURE

100 HP 1.5 in BB BB 2.3 - 3.5 psi 350 HP 1.5 in - 2.0 in BB BB 6.4 - 9.7 psi 100 HP 1.5 in PC PC 2.4 - 3.6 psi 350 HP 1.5 in - 2.0 in PC PC 6.9 - 10.3 psi 100 HP 2.0 in BB BB 2.2 - 2.3 psi 350 HP 2.0 in BB BB 5.5 - 6.4 psi 100 HP 2.0 in PC PC 2.2 - 2.4 psi 350 HP 2.0 in PC PC 5.7 - 6.9 psi 100 HP 2.5 in PC PC 2.2 - 2.2 psi 350 HP 2.5 in PC PC 4.4 - 5.5 psi 100 HP 3.0 in PC PC 2.1 - 2.2 psi 350 HP 3.0 in PC PC 4.0 - 4.4 psi 100 HP 4.0 in PC PC 2.1 - 2.1 psi 350 HP 4.0 in PC PC 3.8 - 4.0 psi

125 HP 1.5 in BB BB 3.3 - 4.9 psi 400 HP 1.5 in - 2.0 in BB BB 7.8 - 11.7 psi 125 HP 1.5 in PC PC 3.4 - 5.0 psi 400 HP 1.5 in - 2.0 in PC PC 8.3 - 12.5 psi 125 HP 2.0 in BB BB 3.1 - 3.3 psi 400 HP 2.0 in BB BB 6.4 - 7.8 psi 125 HP 2.0 in PC PC 3.1 - 3.4 psi 400 HP 2.0 in PC PC 6.6 - 8.3 psi 125 HP 2.5 in PC PC 3.0 - 3.1 psi 400 HP 2.0 in - 2.5 in BB PC 6.2 - 6.4 psi 125 HP 3.0 in PC PC 2.9 - 3.0 psi 400 HP 2.0 in - 2.5 in PC PC 6.3 - 6.6 psi 125 HP 4.0 in PC PC 2.9 - 2.9 psi 400 HP 2.5 in PC PC 5.0 - 6.2 psi

400 HP 3.0 in PC PC 4.6 - 5.0 psi 150 HP 1.5 in BB BB 3.4 - 5.1 psi 400 HP 4.0 in PC PC 4.3 - 4.6 psi 150 HP 1.5 in PC PC 3.6 - 5.3 psi 150 HP 2.0 in BB BB 3.1 - 3.4 psi 500 HP 1.5 in - 2.5 in BB PC 7.7 - 11.6 psi 150 HP 2.0 in PC PC 3.2 - 3.6 psi 500 HP 1.5 in - 2.5 in PC PC 8.4 - 12.7 psi 150 HP 2.5 in PC PC 3.0 - 3.1 psi 500 HP 2.0 in - 2.5 in BB PC 5.8 - 7.7 psi 150 HP 3.0 in PC PC 2.9 - 3.0 psi 500 HP 2.0 in - 2.5 in PC PC 5.9 - 8.4 psi 150 HP 4.0 in PC PC 2.9 - 2.9 psi 500 HP 2.5 in PC PC 3.9 - 5.8 psi

500 HP 3.0 in PC PC 3.2 - 3.9 psi 200 HP 1.5 in BB BB 4.9 - 7.3 psi 500 HP 4.0 in PC PC 2.8 - 3.2 psi 200 HP 1.5 in PC PC 5.1 - 7.6 psi 200 HP 2.0 in BB BB 4.4 - 4.9 psi 600 HP 2.0 in - 2.5 in BB PC 8.1 - 12.1 psi 200 HP 2.0 in PC PC 4.4 - 5.1 psi 600 HP 2.0 in - 2.5 in PC PC 8.3 - 12.4 psi 200 HP 2.5 in PC PC 4.0 - 4.4 psi 600 HP 2.0 in - 3.0 in BB PC 7.8 - 8.1 psi 200 HP 3.0 in PC PC 3.9 - 4.0 psi 600 HP 2.0 in - 3.0 in PC PC 8.0 - 8.3 psi 200 HP 4.0 in PC PC 3.8 - 3.9 psi 600 HP 2.5 in PC PC 5.5 - 7.8 psi

600 HP 2.5 in - 3.0 in PC PC 5.2 - 5.5 psi 250 HP 1.5 in BB BB 4.2 - 6.4 psi 600 HP 3.0 in PC PC 4.3 - 5.2 psi 250 HP 1.5 in PC PC 4.6 - 6.9 psi 600 HP 4.0 in PC PC 3.7 - 4.3 psi 250 HP 2.0 in BB BB 3.4 - 4.2 psi 250 HP 2.0 in PC PC 3.5 - 4.6 psi 700 HP 2.0 in - 3.0 in BB PC 11.0 - 15.0 psi 250 HP 2.5 in PC PC 3.0 - 3.4 psi 700 HP 2.0 in - 3.0 in PC PC 11.3 - 15.0 psi 250 HP 3.0 in PC PC 2.9 - 3.0 psi 700 HP 2.5 in - 3.0 in PC PC 7.0 - 10.0 psi 250 HP 4.0 in PC PC 2.7 - 2.9 psi 700 HP 3.0 in PC PC 5.9 - 7.0 psi

700 HP 4.0 in PC PC 5.0 - 5.9 psi 300 HP 1.5 in - 2.0 in BB BB 5.7 - 8.6 psi 300 HP 1.5 in - 2.0 in PC PC 6.0 - 9.0 psi 300 HP 2.0 in BB BB 4.8 - 5.7 psi 300 HP 2.0 in PC PC 4.9 - 6.0 psi 300 HP 2.5 in PC PC 4.3 - 4.8 psi 300 HP 3.0 in PC PC 4.1 - 4.3 psi 300 HP 4.0 in PC PC 3.9 - 4.1 psi

Standard Gas Train size is highlighted

Table 17. CBEX altitude correction for gas

ALTITUDE

(FT)

CORRECTION

FACTOR

ALTITUDE

(FT)

CORRECTION

FACTOR

To obtain min. req. gas pressure at altitudes above 700 feet, multiply pressure by the listed facto Inches WC x 0.577 = oz/sq-in.

1000 1.04 6000 1.25 oz/sq-in x 1.732 = inches WC.

2000 1.07 7000 1.3 Inches WC x 0.0361 = psig.

3000 1.11 8000 1.35 oz/sq-in x 0.0625 = psig.

4000 1.16 9000 1.4 psig x 27.71 = Inches WC.

5000 1.21 - - psig x 16.0 = oz/sq-in.

Boiler Room Information

Table 17 shows typical boiler room width requirements.

Stack Support Capabilities

CBEX boilers can support up to 2000 lbs. without additional support.

CBEX boilers can be reinforced to support up to 3000 lbs.

Boiler Room Combustion Air

When determining boiler room air requirements, the size of the room, air flow, and velocity 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 are recommended. Locate one (1) at each end of the boiler room, preferably below a height 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 should not be covered with fine mesh wire, as this type of covering has poor air flow qualities and is subject to clogging by dust or dirt.

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

D.Under no condition should the total area of the air supply openings be less than one (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 = Maximum bhp x 2 cfm/bhp or a total of 10 cfm/bhp - up to 1000 feet 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.

Example: Determine the area of the boiler room air supply openings for (1) 1000 hp boiler at 800 feet altitude.

Table 18. Boiler room width

BOILER

HP

100-

150-

250-

350-

500-

700-

DIM. "A" 86 88 92 98 102 105

DIM. "B" 120 127 144 151 174 178

NOTES:

1. Recommended Minimum Distance Between Boiler and Wall. Dimension "A" allows for a clear 42" aisle between the water column on the boiler and the wall. If space per-mits, this aisle should be widened.

2. Recommended Minimum Distance Between Boilers.

Dimension "B" between boilers allows for a "clear" aisle of:

42" - 100-200 HP

48" - 250-400 HP

60" - 500-800 HP

If space permits, this aisle should be widened.

A B

FEEDWATER

TANK

BOILER

FEEDWATER

PUMP

DRAIN

TRENCH

The air openings are to be 5 feet above floor level.

• Air required: 1000 x 10 = 10000 cfm (from 2B above).

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

• Area Required: Area = cfm/fpm = 10000/250 = 40 Sq-ft total.

• Area/Opening: 40/2 = 20 sq-ft/opening (2 required).

Notice Consult local codes, which may supersede these requirements.

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 CBEX is not required, it is necessary to size the stack/breeching to limit flue gas pressure variation. The allowable pressure range is –0.50” W.C. to +0.50” W.C. The maximum pressure variation at any firing rate for the boiler is 0.50" W.C.

The low NOx option allowable pressure range is -0.25” W.C. to +0.25” W.C. The maximum pressure variation at any firing rate for the boiler is 0.25”W.C.

Stack and breeching sizes should always be provided by a reputable stack supplier who will design the stack and breeching system based on the above criteria. Your local Cleaver-Brooks authorized representative is capable of assisting in your evaluation of the stack/breeching design.

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

Table 19. CBEX lifting lugs

BOILER HP ALL DIMENSIONS IN INCHES

A B C D E

100 75.25 21.375 101.75 10 3 125 75.25 21.375 108.75 10 3 150 79.5 21.375 102.5 10 3 200 79.5 21.375 121.5 10 3 250 87.25 27.5 131.25 10 3 300 87.25 27.5 139.25 10 3 350 99.5 36.375 144 10 3 400 99.5 36.375 153 10 3 500 107.625 36.5 162 10 3 600 107.625 36.5 177 10 3 700 115.75 37.75 183.5 10 3 800 115.75 37.75 190.5 10 3

NEAR

SIDE

VIEW B

FAR

SIDE

FRONT

FLANGE

VIEW A

E DIA. HOLE

A

C L

B

D

D

C

Table 20. CBEX Elite boiler mounting piers

BOILER

HP

ALL DIMENSIONS IN INCHES

A B C D E F G X1 X2

100 6 9 130.5 34.5 52.5 4 39.5 15 11.5 125 6 9 137.5 34.5 52.5 4 39.5 15 11.5 150 6 9 140 39.5 57.5 4 44.5 13 11.5 200 6 9 159 39.5 57.5 4 44.5 13 11.5 250 6 9 186.125 38 56 4 43 16 8 300 6 9 194.125 38 56 4 43 16 8 350 6 12 208.5 48 72 4 56 18 11.5 400 6 12 217.5 48 72 4 56 18 11.5 500 6 12 219.5 41.5 65.5 6.5 47 16 11.5 600 6 12 234.5 41.5 65.5 6.5 47 16 11.5 700 6 12 243.5 49.5 73.5 6.5 55 15 12.5 800 6 12 250.5 49.5 73.5 6.5 55 15 12.5

NOTE:

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

Table 21. Front Davit Support

Boiler HP Motor HP Hole Number

350-400 15 1

25 2

500-600 15-25 1

40 2

700-800 40 2

60 3