Attachment 24 Cleaver Brookes Package Boiler Model CBLE 125 800 hp.pdf

1 Rev. 2 13

CONTENTS

FEATURES AND BENEFITS

True Boiler/Burner/Low NOx Package

PRODUCT OFFERING

Standard Equipment Available Options

DIMENSIONS AND RATINGS

PERFORMANCE DATA

Specifying Boiler Efficiency Efficiency Specification Emissions

ENGINEERING DATA

Sound Level Gas-Fired Burners Oil-Fired Burners General Boiler Information Boiler Room Information Stack Support Capabilities Stack/Breeching Size Criteria Boiler Room Combustion Air Sample Specifications (Steam) Sample Specifications (Hot Water)

Model CBLE Boilers

125-800HP

Model CBLE 125-800 HP Boilers

Rev. 2 13

ILLUSTRATIONS

Figure A1-1. CB-LE Steam - 125-200 HP Figure A1-2. CB-LE Steam - 250-350 HP Figure A1-3. CB-LE Steam - 400-800 HP Figure A1-4. CB-LE Hot Water - 125-200 HP Figure A1-5. CB-LE Hot Water 250-350 HP Figure A1-6. CB-LE Hot Water 400-800 HP Figure A1-7. Space Required to Open Rear Head on Model CB-LE Boilers Equipped with Davits Figure A1-8. Model CB-LE Boiler Mounting Piers (60” and 78”) Figure A1-9. Model CB-LE Boiler Mounting Piers (96”) Figure A1-10. Front Davit Support Figure A1-11. Lifting Lug Location, Model CB-LE Boilers Figure A1-12. Predicted Stack Temperature Increase for Pressure Greater Than 125 psig Figure A1-13. Standard Gas Train Connection Size and Location Figure A1-14. Typical Gas Piping Layout Figure A1-15. Model CB-LE Gas Train Components Figure A1-16. No.2 Oil Connection Size, Location, and Recommended Line Sizes Figure A1-17. No. 2 Oil Piping, Single Boiler Installation, Remote Oil Pump Figure A1-18. No. 2 Oil Piping, Multiple Boiler Installation, Remote Oil Pumps Figure A1-19. No. 2 Oil Piping, Multiple Boiler Installation Figure A1-20. No. 2 Oil Transfer Tank Detail Figure A1-21. Typical Arrangement Figure A1-22. Boiler Room Length (Typical Layouts) Figure A1-23. Boiler Room Width (Typical Layout) Figure A1-24. Breeching Arrangement

TABLES

Table A1-1. Model CB-LE Steam Boiler Ratings Table A1-2. Model CB-LE Hot Water Boiler Ratings Table A1-3. Model CB-LE Steam Boiler Dimensions, 60” (15 - 150 psig Design Pressure) Table A1-4. Model CB-LE Steam Boiler Dimensions, 78” (15 - 150 psig Design Pressure) Table A1-5. Model CB-LE Steam Boiler Dimensions, 96” (15 - 150 psig Design Pressure) Table A1-6. Model CB-LE Hot Water Boiler Dimensions, 60” (30 and 125 psig Design Pressure) Table A1-7. Model CB-LE Hot Water Boiler Dimensions, 78” (30 and 125 psig Design Pressure) Table A1-8. Model CB-LE Hot Water Boiler Dimensions, 96” (30 and 125 psig Design Pressure) Table A1-9. Blower Motor Selection - Steam Boilers O 150 psig, all HW boilers Table A1-10. Blower Motor Selection - Steam Boilers >150 psig Table A1-11. Blower Motor Selection CB-LE NTI Boilers Table A1-12. Turndown Guarantee for CB-LE NTI Boilers - Natural Gas & #2 Oil Table A1-13. Model CB-LE Boiler Weights Table A1-14. Steam Boiler Safety Valve Openings

3 Rev. 2 13

Table A1-15. Hot Water Boiler Relief Valve Openings Table A1-16. Predicted Fuel-to-Steam Efficiencies - Natural Gas Table A1-17. Predicted Fuel-to-Steam Efficiencies - No. 2 Oil Table A1-18. CB-LE Boilers - Natural Gas, Emission Levels Table A1-19. CB-LE Boilers - No. 2 Oil, Emission Levels Table A1-20. Model CB-LE Predicted Sound Levels 30 ppm NOx Systems Table A1-21. Standard, Undersize, and Oversize Gas Trains, Model CB-LE Boilers Table A1-22. Recommended NTI Gas Train Sizes & Pressure Ranges Table A1-23. Minimum Required Regulated Gas Pressure Altitude Conversion Table A1-24. Maximum Gas Consumption (CFH) for Natural Gas and Propane Vapor Table A1-25. Model CB-LE Blowdown Tank Sizing Table A1-26. Heating Surface, Model CB-LE Boilers Table A1-27. Steam Volume & Disengaging Area Table A1-28. Recommended Steam Nozzle Size Table A1-29. Recommended Non-Return Valve Size

The Low Emission feature combines the packaging of induced flue gas recirculation with the Cleaver-Brooks integral front head. The front head routes the flue gases from the fourth pass to the fan and burner assembly for reliable low NOx performance. The enhanced burner design assures maximum NOx reduction at all firing rates while maintaining top of the line boiler performance.

Standard Low Emission Options include 60, 30, 25, or 20 ppm packages (all NOx emission levels are given on a dry volume basis and corrected to 3% O2):

• NOx performance for 60 ppm (natural gas corrected to 3% O2) uses a standard size combustion air fan for induced flue gas recirculation.

• NOx performance for 30, 25, or 20 ppm (natural gas corrected to 3% O2) includes a larger combustion air fan/ motor assembly and a larger internal NOx reduction system.

Cleaver-Brooks' commitment to lowering emissions is based on more than 400 low NOx installations - all passing guar-anteed emission performance levels.

4 Rev. 2 13

FEATURES AND BENEFITS

The Cleaver-Brooks Model CB Boiler - the premium firetube on the market today -includes the four-pass dryback design, five square feet of heating surface per boiler horsepower, and maximum boiler efficiency. In addition to the features of the Model CB Boiler, the Low Emission Option provides the following

Integral Front Head Design

• Single-piece front door.

• Fan cassette assembly for easy access to fan and motor.

• Guaranteed low nitrogen oxide (NOx) performance.

• Enhanced burner performance.

• Improved flame stability and combustion control.

• Intimate mixing of air and fuel assures minimum CO levels at low NOx levels.

True Boiler/Burner/Low NOx Package.

• UL/ULC approved package.

• Assures highest fuel-to-steam efficiency.

• Eliminates the need for field installation of burner, controls, or NOx equipment.

• Single point positioning of fuel and air ensures ease of startup and provides reliable operation.

PRODUCT OFFERING

The Low Emission Option currently is available on:

• 125 - 800 hp Model CB Firetube Dryback Boilers.

• High-pressure and low-pressure steam and hot water designs.

• Natural Gas, No. 2 oil, or combination fired.

• Retrofit capability.

Standard Equipment • Model CB Firetube Boiler.

• New integral front head with internal low NOx system.

• Enhanced burner design.

Available Options For option details, contact your local Cleaver-Brooks authorized representative.

• Full line of Model CB Firetube options.

• Additional NOx reduction packages.

DIMENSIONS AND RATINGS

The Model CB-LE dimensions and ratings are provided inTable A1-1 through Table A1-8, and in Figure A1-1 through Figure A1-6.

5 Rev. 2 13

BOILER HP 125 150 200 250 300 350 400 500 600 700 750 800

POWER REQUIREMENTS - SEA LEVEL TO 700 FT, 60 HZ

Rated Cap. Btu Output (1000 Btu/hr) 4184 5021 6695 8369 10043 11716 13390 16738 20085 23432 25106 26779

APPROXIMATE FUEL CONSUMPTON AT RATED CAPACITY

Light Oil (gph)A 36.4 43.7 58.3 72.9 87.5 102.1 116.6 145.8 175.0 204.1 218.7 233.3

Natural Gas (cfh) MBtu 5103 6124 8165 10206 12247 14288 16329 20415 24494 28576 30618 32659

Gas (Therm/hr) 51.0 61.2 81.7 102.1 122.5 142.9 163.3 204.2 245.0 285.8 306.2 326.6

POWER REQUIREMENTS - SEA LEVEL TO 700 FT, 60 HZ

Blower Motor hp Refer to Tables A1-9 and A1-10

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

Air Compressor Motor hp (Oil firing Only) 3 3 3 5 5 5 7-1/2 7-1/2 7-1/2 7-1/2 7-1/2 7-1/2

NOTES:

A. Based on 140,000 Btu/gal.

Table A1-2. Model CB-LE Hot Water Boiler Ratings

BOILER HP 125 150 200 250 300 350 400 500 600 700 750 800

RATINGS SEA LEVEL TO 700 FT

Rated Steam Cap. (lbs/hr from and @ 212 °F)

4313 5175 6900 8625 10350 12075 13800 17250 20700 24150 25875 27600

Btu Output (1000 Btu/hr) 4184 5021 6695 8369 10043 11716 13390 16738 20085 23432 25106 26779

APPROXIMATE FUEL CONSUMPTION AT RATED CAPACITY

Light Oil (gph)A 36.4 43.7 58.3 72.9 87.5 102.1 116.6 145.8 175.0 204.1 218.7 233.3

Natural Gas (cfh) MBtu 5103 6124 8165 10206 12247 14288 16329 20412 24494 28576 30618 32659

Gas (Therm/hr) 51.0 61.2 81.7 102.1 122.5 142.8 163.3 204.2 245.0 285.8 306.2 326.6

POWER REQUIREMENTS - SEA LEVEL TO 700 FT, 60 HZ

Blower Motor hp Refer to Tables A1-9 and A1-10

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

Air Compressor Motor hp (Oil firing Only)

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

NOTES:

A. Based on 140,000 Btu/gal.

Table A1-1. Model CB-LE Steam Boiler Ratings

Veteran Highlight note that this is a 700 hp boiler for all 3 boilers that are in operation at the VA facility in Bedford MA.

Veteran Highlight

6 Rev. 2 13

A

B

C D

E

F

G

H I J

K L

M Y

N

O

P Q R S

T

UV

W X

Y

AA

BB CC DD EE

GG

HH

HH

JJ

GG

GG

JJ

KK

FF FARSIDE

Table A1-3. Model CB-LE Steam Boiler Dimensions, 60” (15 - 150 psig Design Pressure) - Sheet 1 of 2

(measurements shown in inches)

Description DIM Boiler HP 125 150 200

LENGTHS

Length Overall A 173 196.5 228.5 Shell B 125 149 180 Front Head Extension C 28 28 29 Front Ring Flange to Nozzle - 15# D 88 90 96 Front Ring Flange to Nozzle - 150# D 84 84 96 Rear Head Extension E 19.5 19.5 19.5 Front Ring Flange to Panel G 17 17 17 Ring Flange to Base H 0.5 0.5 0.5 Base Frame I 112 136 167 Rear Flange Ring to Base J 12.5 12.5 12.5

HEIGHTS

Ht Overall K 87 87 87 Base to Vent Outlet L 87 87 87 Base to Boiler Centerline M 46 46 46 Base to Gas Train N 6 8.5 8.5

Figure A1-1. CB-LE Steam - 125-200 HP

7 Rev. 2 13

Description DIM Boiler HP 125 150 200

HEIGHTS (continued) Base to Panel Top T 75 75 77 Base to Panel Bottom U 15 15 17 Height of Base V 12 12 12 Base to Steam Nozzle Y 82.38 82.38 82.38

WIDTHS

Width Overall O 89.88 89.875 90.5 Center to ALWCO P 38.75 38.75 38.75 Center to Outside Control Panel Q 48.5 48.5 48.5 Center to Lagging R 33 33 33 Center to WC S 44.5 45 45 Base Inside W 44.5 44.5 44.5 Base Outside X 52.5 52.5 52.5 Boiler I.D. F 60 60 60

CONNECTIONS

Electric - Main Power Supply AA 460 / 3 / 60 460 / 3 / 60 460 / 3 / 60 Surface Blowoff (with collector pipe) BB 1 1 1 Steam Outlet 15# (150# Flange) CC 8 8 10 Steam Outlet 150# (300# Flange) CC 4 4 4 Chemical Feed FF 1 1 1 Feed Water (2) GG 1.5 1.5 2 Blowdown (2) 150# HH 1.5 1.5 1.5 Drain (2) 15# HH 1.5 1.5 2 Water Column Blowdown JJ 0.75 0.75 0.75 Gauge Glass Blowdown KK .025 0.25 0.25

VENT STACK

Diameter (OD) (flgd. connection) 16 16 16

CLEARANCES

Rear Door Swing (Davited) 32 32 32 Front Door Swing 67 67 67 Tube Removal, Rear 115 139 170 Tube Removal, Front 103 127 158

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

From Rear of Boiler 307 355 417 From Front of Boiler 260 308 370 Through Window or Doorway 224 248 279

WEIGHT IN LBS

Normal Water Capacity 5750 7250 8625 Approx. Ship Wt. 15 psig 11300 12600 14600 Approx. Ship Wt. 150 psig 12400 13500 15600 Approx. Ship Wt. 200 psig 13000 14200 16400

Table A1-3. Model CB-LE Steam Boiler Dimensions, 60” (15 - 150 psig Design Pressure) - Sheet 2 of 2

8 Rev. 2 13

A

BC

D

E

F

G

H I J

K

L

M

N

O P Q

R S

T

U V

W X

Y

AA

BBCC

DD

EE

FF

GG

HH

HH

JJ

JJ

KK

GG

GG

Y

FARSIDE

(measurements shown in inches)

Description DIM Boiler HP 250 300 350

LENGTHS

Length Overall A 191.5 220 250 Shell B 144 171 201 Front Head Extension C 23.5 25 25 Front Ring Flange to Nozzle - 15# D 90 98 112 Front Ring Flange to Nozzle - 150# D 88 98 112 Rear Head Extension E 24 24 24 Front Ring Flange to Panel G 17 23 23 Ring Flange to Base H 0.5 0.5 0.5 Base Frame I 131 158 188 Rear Flange Ring to Base J 12.5 12.5 12.5

HEIGHTS

Ht Overall K 115 115 115 Base to Vent Outlet L 106 106 106 Base to Boiler Centerline M 56 56 56 Base to Gas Train N 10 10 10 Base to Panel Top T 77 77 77 Base to Panel Bottom U 17 17 17 Height of Base V 12 12 12 Base to Steam Nozzle Y 101.50 101.50 101.50

Table A1-4. Model CB-LE Steam Boiler Dimensions, 78” (15 - 150 psig Design Pressure) - Sheet 1 of 2

Figure A1-2. CB-LE Steam - 250-350 HP

9 Rev. 2 13

Description DIM Boiler HP 250 300 350

WIDTHS

Width Overall O 106.5 106.5 108.75 Center to ALWCO P 48.5 48.5 48.5 Center to Outside Control Panel Q 58 58 58 Center to Lagging R 42 42 42 Center to WC S 53.75 53.75 53.75 Base Inside W 56 56 56 Base Outside X 64 64 64 Boiler I.D. F 78 78 78

CONNECTIONS

Electric - Main Power Supply AA 460 / 3 / 60 460 / 3 / 60 460 / 3 / 60 Surface Blowoff (with collector pipe) BB 1 1 1 Steam Outlet 15# (150# Flange) CC 10 12 12 Steam Outlet 150# (300# Flange) CC 6 6 6 Chemical Feed FF 1 1 1 Feed Water (2) GG 2 2 2.5 Blowdown (2) 150# HH 1.5 1.5 1.5 Drain (2) 15# HH 2 2 2 Water Column Blowdown JJ 0.75 0.75 0.75 Gauge Glass Blowdown KK 0.25 0.25 0.25

VENT STACK

Diameter (OD) (flgd. connection) 20 20 20

CLEARANCES

Rear Door Swing 43 43 43 Front Door Swing 89 89 89 Tube Removal, Rear 131 157 187 Tube Removal, Front 116 142 172

MINIMUM BOILER ROOM LENGTH ALLOWING FOR DOOR SWING AND TUBE REMOVAL

From Rear of Boiler 364 417 477 From Front of Boiler 303 356 416 Through Window or Doorway 275 302 332

WEIGHT IN LBS

Normal Water Capacity 10670 13000 15465 Approx. Ship Wt. 15 psig 21500 23600 26800 Approx. Ship Wt. 150 psig 22800 25200 27800 Approx. Ship Wt. 200 psig 24600 27200 29300

Table A1-4. Model CB-LE Steam Boiler Dimensions, 78” (15 - 150 psig Design Pressure) - Sheet 2 of 2

10 Rev. 2 13

A

BC

D

E

F

G

H I J

K

AA

BB CC

DD

EE

FF

JJ

GG

HH HH

L

M

N

O

P Q R S

T

UV

W

X

Y

JJ

JJ

KK

GGGG

Y

FARSIDE

Table A1-5. Model CB-LE Steam Boiler Dimensions, 96” (15 - 150 psig Design Pressure) - Sheet 1 of 2

(measurements shown in inches)

Description DIM Boiler HP 400 500 600 700 750 800

LENGTHS

Length Overall A 205.75 227.75 259.75 298.75 298.75 298.75 Shell B 146.75 167.5 199.75 232.75 232.75 232.75 Front Head Extension C 27 28 28 34 34 34 Front Ring Flange to Nozzle - 15# D 98 101 96 112 112 112 Front Ring Flange to Nozzle - 150# D 96 100 96 112 112 112 Rear Head Extension E 32 32 32 32 32 32 Front Ring Flange to Panel G 26 26 26 26 26 26 Ring Flange to Base H 0.5 0.5 0.5 0.5 0.5 0.5 Base Frame I 133.75 154.75 186.75 219.75 219.75 219.75 Rear Flange Ring to Base J 12.5 12.5 12.5 12.5 12.5 12.5

Figure A1-3. CB-LE Steam - 400-800 HP

11 Rev. 2 13

Description DIM Boiler HP 400 500 600 700 750 800

HEIGHTS

Ht Overall K 134 134 134 134 134 134 Base to Vent Outlet L 126 126 126 126 126 126 Base to Boiler Centerline M 67 67 67 67 67 67 Base to Gas Train N 12 12 12 12 12 12 Base to Panel Top T 75 75 75 75 75 75 Base to Panel Bottom U 15 15 15 15 15 15 Height of Base V 12 12 12 12 12 12 Base to Steam Nozzle Y 121.5 123.5 121.5 121 121 121

WIDTHS

Width Overall O 124 124.25 124 124 124 124 Center to ALWCO P 57.5 57.5 57.5 57.5 57.5 57.5 Center to Outside Control Panel Q 66.5 66.5 66.5 66.5 66.5 66.5 Center to Lagging R 51 51 51 51 51 51 Center to WC S 63 63 63 63 63 63 Base Inside W 58.88 58.88 58.88 58.88 58.88 58.88 Base Outside X 71.88 71.88 71.88 71.88 71.88 71.88 Boiler I.D. F 96 96 96 96 96 96

CONNECTIONS

Electric - Main Power Supply AA 460 / 3 / 60 460 / 3 / 60 460 / 3 / 60 460 / 3 / 60 460 / 3 / 60 460 / 3 / 60 Surface Blowoff (with collector pipe) BB 1 1 1 1 1 1 Steam Outlet 15# (150# Flange) CC 12 12 12 12 12 12 Steam Outlet 150# (300# Flange) CC 6 8 8 8 8 8 Chemical Feed FF 1 1 1 1 1 1 Feed Water (2) GG 2.5 2.5 2.5 2.5 2.5 2.5 Blowdown/Drain (2) HH 2 2 2 2 2 2 Water Column Blowdown JJ 0.75 0.75 0.75 0.75 0.75 0.75 Gauge Glass Blowdown KK 0.25 0.25 0.25 0.25 0.25 0.25

VENT STACK

Diameter (OD) (flgd. connection) 24 24 24 24 24 24

CLEARANCES

Rear Door Swing 53 53 53 53 53 53 Front Door Swing 108 108 108 108 108 108 Tube Removal, Rear 131 152 184 217 217 217 Tube Removal, Front 114 135 167 200 200 200

MINIMUM BOILER ROOM LENGTH ALLOWING FOR DOOR SWING AND TUBE REMOVAL

From Rear of Boiler 386 428 492 558 558 558 From Front of Boiler 314 356 420 486 486 486 Through Window or Doorway 308 329 361 394 394 394

WEIGHT IN LBS

Normal Water Capacity 14810 15950 19270 23000 23000 23000 Approx. Ship Wt. 15 psig 33500 37110 42300 49500 49600 49600 Approx. Ship Wt. 150 psig 36570 39970 45025 52050 52150 52150 Approx. Ship Wt. 200 psig 39680 43580 49400 57315 57415 57415

Table A1-5 Model CB-LE Steam Boiler Dimensions, 96” (15 - 150 psig Design Pressure) - Sheet 2 of 2

12 Rev. 2 13

BOILER HP DIM 125 150 200

LENGTHS

Overall (60 ppm System) A 171-1/2 196-1/2 228-1/2

Shell B 125 149 180

Base Frame C 112 136 167

Front Head Extension (60 ppm System) D 27 28 29

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

Front Ring Flange to Outlet HH 114 136 167

Front Ring Flange to Return H 89 102 131

Ring Flange to Base F 1/2 1/2 1/2

Over Tubesheets V 113 137 168

Shell Extension P 12 12 12

Rear Flange Ring to Base G 12-1/2 12-1/2 12-1/2

Table A1-6. Model CB-LE Hot Water Boiler Dimensions, 60” (30 and 125 psig Design Pressure) - Sheet 1 of 2

Figure A1-4. CB-LE Hot Water - 125-200 HP

R

F G

W W

P

BB

D E

GG

Q

Z

Y T U

RR - RF - RD

X

HH

A

B

H I

L K

OO O

KK

M

N

EE

FF

DD

V

J

C

13 Rev. 2 13

BOILER HP DIM 125 150 200

WIDTHS

Overall I 75-1/2 75-1/2 75-1/2

I.D. Boiler J 60 60 60

Center to Entrance Box K 42-1/2 42-1/2 42-1/2

Center to Outside Hinge KK 35 35 35

Center to Lagging L 33 33 33

Base, Outside M 52-1/2 52-1/2 52-1/2

Base, Inside N 44-1/2 44-1/2 44-1/2

HEIGHTS

Overall OO 87 87 87

Base to Vent Outlet O 87 87 87

Base to Return and Outlet X 82-3/8 82-3/8 82-3/8

Height of Base Q 12 12 12

Base to Bottom of Boiler R 16 16 16

BOILER CONNECTION

Auxiliary Connection Z 1 1 1

Water Return Flange T 6A 6A 6A

Water Outlet Flange (2" Dip Tube Included) U 6A 6A 6A

Drain, Front and Rear W 1-1/2 1-1/2 2

Air Vent Y 1-1/2 1-1/2 1-1/2

VENT STACK

Diameter (flgd. connection) BB 16 16 16

MINIMUM CLEARANCES

Rear Door Swing DD 32 32 32

Front Door Swing EE 67 67 67

Tube Removal, Rear FF 115 139 170

Tube, Removal, Front GG 103 127 158

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

Rear of Boiler RR 307 355 417

Front of Boiler RF 260 308 370

Thru Window or Doorway RD 224 248 279

WEIGHT IN LBS

Water Capacity Flooded 7670 9295 11130

Approx. Ship. Wgt. – 30 psig Approx. Ship. Wgt. – 125 psig

11400 11800

12500 12900

14500 14900

NOTES: All connections are threaded unless indicated.

A. ANSI 150 psig flange.

Table A1-6. Model CB-LE Hot Water Boiler Dimensions, 60” (30 and 125 psig Design Pressure) - Sheet 2 of 2

14 Rev. 2 13

BOILER HP DIM 250 300 350

LENGTHS

Overall (60 ppm System) A 191-1/2 220 252

Shell B 144 171 201

Base Frame C 131 158 188

Front Head Extension (60 ppm System) D 23-1/2 25 27

Rear Head Extension E 24 24 24

Front Ring Flange to Return H 103-1/2 130 160

Front Ring Flange to Outlet HH 131 158 188

Ring Flange to Base F 1/2 1/2 1/2

Over Tubesheets V 129 156 186

Shell Extension P 15 15 15

Rear Flange Ring to Base G 12-1/2 12-1/2 12-1/2

Table A1-7. Model CB-LE Hot Water Boiler Dimensions, 78” (30 and 125 psig Design Pressure) - Sheet 1 of 2

Figure A1-5. CB-LE Hot Water 250-350 HP skoorBrevaelC

R

F G

W W

P

BB

D E

GG

Q

Z

Y T U

RR - RF - RD

X

HH

A

B

H I

L K

OO

O

KK

M

N

EE

FF

DD

V

15 Rev. 2 13

BOILER HP DIM 250 300 350

WIDTHS

Overall I 93 93 93

I.D. Boiler J 78 78 78

Center to Entrance Box K 51 51 51

Center to Outside Hinge KK 51 51 51

Center to Lagging L 42 42 42

Base, Outside M 64 64 64

Base, Inside N 52 52 52

HEIGHTS

Overall OO 115 115 115

Base to Vent Outlet O 106 106 106

Base to Return and Outlet X 101-1/2 101-1/2 101-1/2

Height of Base Q 10 10 10

Base to Bottom of Boiler R 17 17 17

BOILER CONNECTION

Auxiliary Connection Z 1-1/4 1-1/4 1-1/4

Water Return Flange (2" Dip Tube included) T 8A 8A 8A

Water Outlet Flange (2" Dip Tube Included) U 8A 8A 8A

Air Vent Y 1-1/2 1-1/2 1-1/2

Drain, Front and Rear W 2 2 2

VENT STACK

Diameter (flgd. connection) BB 20 20 20

MINIMUM CLEARANCES

Rear Door Swing DD 43 43 43

Front Door Swing EE 89 89 89

Tube Removal, Rear FF 131 157 187

Tube, Removal, Front GG 116 142 172

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

Rear of Boiler RR 364 417 477

Front of Boiler RF 303 356 416

Thru Window or Doorway RD 275 302 332

WEIGHT IN LBS

Water Capacity Flooded 13880 16840 20090

Approx. Ship. Wgt. – 30 psig Approx. Ship. Wgt. – 125 psig

21400 22200

23500 24300

26700 27500

NOTES: All connections are threaded unless indicted.

A. ANSI 150 psig flange.

Table A1-7. Model CB-LE Hot Water Boiler Dimensions, 78” (30 and 125 psig Design Pressure) - Sheet 2 of 2

16 Rev. 2 13

BOILER HP DIM 400 500 600 700 750 800

LENGTHS

Overall (60 ppm System) A 206 228 262 299 300 300

Shell B 147 168 200 233 233 233

Base Frame C 134 155 187 220 220 220

Front Head Extension (60 ppm System) D 27 28 30 34 35 35

Rear Head Extension E 32 32 32 32 32 32

Shell Ring Flange to Base F 1/2 1/2 1/2 1/2 1/2 1/2

Rear Ring Flange to Base G 12-1/2 12-1/2 12-1/2 12-1/2 12-1/2 12-1/2

Shell Flange to Outlet HH 139-1/2 156-1/2 182-1/2 216-1/2 216-1/2 216-1/2

Shell Flange to Return H 107 125 151-1/2 185 185 185

Over Tubesheets V 130 151 183 216 216 216

Shell Extension P 17 17 17 17 17 17

Table A1-8. Model CB-LE Hot Water Boiler Dimensions, 96” (30 and 125 psig Design Pressure) - Sheet 1 of 2

Figure A1-6. CB-LE Hot Water 400-800 HP skoorBrevaelC

R

F G

W W

P

BB

D E

GG

Q

Z

Y T U

RR - RF - RD

X

HH

A

B

H I

L K

OO

O

KK

M

N

EE

FF

DD

V

17 Rev. 2 13

WIDTHS

Overall I 113 113 113 113 115 115

I.D. Boiler J 96 96 96 96 96 96

Center to Entrance Box K 62 62 62 62 64 64

Center to Outside Hinge KK 62 62 62 62 62 62

Center to Lagging L 51 51 51 51 51 51

Base, Outside M 72 72 72 72 72 72

Base, Inside N 56 56 56 56 56 56

HEIGHTS

Overall OO 134 134 134 134 134 134

Base to Vent Outlet O 126 126 126 126 126 126

Height of Base Q 12 12 12 12 12 12

Base to Bottom of Boiler R 19 19 19 19 19 19

Base to Return and Outlet X 121-9/16 121-9/16 121-9/16 121-9/16 121-9/16 121-9/16

BOILER CONNECTIONS

Auxiliary Connection Z 1-1/4 1-1/4 1-1/4 1-1/4 1-1/4 1-1/4

Drain, Front and Rear W 2 2 2 2 2 2

Water Return T 10A 10A 12A 12A 12A 12A

Water Outlet (2” Dip Tube Included) U 10A 10A 12A 12A 12A 12A

Air Vent Y 2 2 2 2 2 2

VENT STACK

Diameter (Flanged Connection) BB 24 24 24 24 24 24

MINIMUM CLEARANCES

Rear Door Swing DD 53 53 53 53 53 53

Front Door Swing EE 108 108 108 108 108 108

Tube Removal, Rear FF 131 152 184 217 217 217

Tube Removal, Front GG 114 135 167 200 200 200

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

Rear of Boiler RR 386 428 492 558 558 558

Front of Boiler RF 314 356 420 486 486 486

Thru Window or Doorway RD 308 329 361 394 394 394

WEIGHT IN LBS

Normal Water Capacity 20015 23300 28260 33360 33360 33360

Approx. Ship. Wgt. – 30 psig Approx. Ship. Wgt. – 125 psig

33300 37270

36900 40780

42150 46005

49650 53300

49750 53400

49750 53400

NOTES: All connections are threaded unless indicated:

A. ANSI 150 psig flange.

BOILER HP DIM 400 500 600 700 750 800

Table A1-8. Model CB-LE Hot Water Boiler Dimensions, 96” (30 and 125 psig Design Pressure) - Sheet 2 of 2

18 Rev. 2 13

BOILER HP

MOTOR HP

PPM

PPM

PPM

PPM

125 5 10 5 10

150 7.5 10 10 10

200 15 15 20 NA

250 7.5 10 15 15

300 10 15 20 25

350 15 25 40 40

400 10 15 20 20

500 15 20 25 30

600 25 30 50 60

700 30 50 75 75

750 50 60 75 NA

800 50 75 NA NA

NOTES: For elevations above 700’ - contact your local Cleaver-Brooks authorized representative.

Table A1-9. Model CB-LE Blower Motor Selection - Operating Pressures 150 psig and Less, and All Hot

Water Boilers

BOILER HP

MOTOR HP

PPM

PPM

PPM

PPM

125 5 10 10 10

150 10 10 10 15

200 15 20 20 NA

250 7.5 10 15 20

300 10 20 30 40

350 20 30 40 50

400 10 15 20 25

500 20 25 30 40

600 25 40 60 60

700 40 60 75B 75C

750 50 75 NA NA

800 60 75A NA NA

NOTES: For elevation above 700’ - contact your local Cleaver-Brooks authorized representative.

A. Downrate to 770 hp.

B. Downrate to 675 hp.

C. Downrate to 660 hp.

Table A1-10. Model CB-LE Blower Motor Selection - Operating Pressures Greater than 150 psig (Steam

Boilers)

09-09

Table A1-11. Blower Motor Selection CB-LE NTI Boilers Table A1-12. Turndown Guarantee for CB-LE NTI Boilers - Natural Gas & #2 Oil

Boiler Size Turndown

9 ppm 15 ppm

125 4:1 4:1

150 4:1 5:1

200 4:1 5:1

250 5:1 5:1

300 5:1 5:1

350 5:1 5:1

400 5:1 6:1

500 5:1 6:1

600 6:1 6:1

700 7:1 7:1

800* 7:1 7:1 *800 HP to be derated to 720 HP for 9 ppm and 750 HP for 15 ppm

Altitude: 700 ft and less - Design Pressure: 150 psi and less

* 800 HP - to be de-rated to 720 HP for 9 ppm and to 750 HP for 15 ppm.

mpp 9mpp 51Nominal Boiler Size Blower Motor HP Blower Motor HP

19 Rev. 2 13

BOILER HP FUEL

SERIES

HOT WATER STEAM

30 PSIG 125 PSIG 15 PSIG 150 PSIG 200 PSIG

100 11200 11600 11300 12000 12600

200 11400 11800 11500 12400 13000

700 11300 11700 11400 12300 12900

100 12300 12700 12400 13200 13900

200 12500 12900 12600 13500 14200

700 12300 12700 12400 13300 14000

100 14400 14800 14500 15500 16300

200 14500 14900 14600 15600 16400

700 14500 14900 14600 15600 16400

100 20700 21500 20800 22000 23800

200 21400 22200 21500 22800 24600

700 20900 21700 21000 22500 24300

100 23100 23900 23200 24800 26800

200 23500 24300 23600 25200 27200

700 23400 24200 23500 25000 27000

100 26200 27000 26300 27600 29100

200 26700 27500 26800 27800 29300

700 26400 27200 26500 27700 29200

100 33000 36970 33200 36270 39380

200 33300 37270 33500 36570 39680

700 33200 37170 33400 36470 39580

100 36600 40470 36810 39670 43480

200 36900 40780 37110 39970 43580

700 36800 40680 37010 39870 43280

100 41850 45905 42000 44725 49100

200 42150 46005 42300 45025 49400

700 42050 45915 42200 44925 49300

100 49450 53000 49300 51850 57015

200 49750 53300 49600 52150 57315

700 49650 53200 49500 52050 57215

NOTES:

1. Weights shown are based on standard product offering for current listed boilers. If units are of special design and construction, actual weight will be determined at time of shipment. Shipment will then be made on shippers weight and count. All weights are in US pounds.

Table A1-13. Model CB-LE Boiler Weights

20 Rev. 2 13

VALVE

SETTING

15 PSIG STEAM 100 PSIG STEAM 125 PSIG STEAM 150 PSIG STEAM 200 PSIG STEAM 250 PSIG STEAM 300 PSIG STEAM

BOILER

HP

NO. OF

VALVES-

REQ'D

OUTLET

SIZE

(IN.)

NO. OF

VALVES-

REQ'D

OUTLET

SIZE

(IN.)

NO. OF

VALVES

REQ'D

OUTLET

SIZE

(IN.)

NO. OF

VALVES-

REQ'D

OUTLET

SIZE

(IN.)

NO. OF

VALVES-

REQ'D

OUTLET

SIZE

(IN.)

NO. OF

VALVES

REQ'D

OUTLET

SIZE

(IN.)

NO. OF

VALVES

REQ'D

OUTLET

SIZE

(IN.)

125 1 3 2 1-1/2 2 (1) 1-1/2

(1) 1-1/4 2 (1) 1-1/2

(1) 1-1/4 2 (1) 1-1/4

(1) 1 2 1 2 1

150 1 3 2 (1) 2

(1) 1-1/2 2 1-1/4 2 (1) 1-1/2

(1) 1-1/4 2 (1) 1

(1) 1-1/4 2 1 2 1

200 2 2-1/2 2 2 2 1-1/2 2 1-1/2 2 (1) 1-1/2

(1) 1-1/4 2 1-1/4 2 (1) 1

(1) 1-1/4

250 2 (1) 2-1/2

(1) 3 2 (1) 2-1/2

(1) 2 2 (1)2 (1)1-1/2 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 2 1-1/4

300 2 3 2 (1) 2-1/2

(1) 2 2 2 2 (1) 2

(1) 1-1/2 2 1-1/2 2 (1)1-1/2 (1)1-1/4 2 (1) 1-1/2

(1) 1-1/4

350 3 (1) 2

(2) 3 3 (1) 2-1/2

(2) 2 2 (1)2 (1)1-1/2 2 2 2 (1) 1-1/2

(1) 2 2 1-1/2 2 (1) 1-1/2

(1) 1-1/4

400 3 (2) 3

(1) 2-1/2 3 (1) 2

(2) 2-1/2 2 (1)2 (1)2-1/2 2 (1) 2-1/2

(1) 2 2 (1) 1-1/2

(1) 2 2 (1) 2

(1) 1-1/2 2 1-1/2

500 3 (3) 3 3 2-1/2 2 2-1/2 2 (1) 2-1/2

(1) 2 2 (1) 2

(1) 2-1/2 2 (1) 2 (1)1-1/2 2 (1) 1-1/2

(1) 2

600 4 3 4 (3) 2-1/2

(1) 2 3 2-1/2 2 2-1/2 2 (1) 2

(1) 2-1/2 2 2 2 2

700 5 (3) 3

(2) 2-1/2 5 (3) 2-1/2

(2) 2 3 2-1/2 3 (2) 2-1/2

(1) 2 2 2-1/2 2 (1) 2

(1) 2-1/2 2 2

800 5 (3) 3

(2) 2-1/2 5 (3) 2-1/2

(2) 2 4 (3) 2-1/2

(1) 2 3 (2) 2-1/2

(1) 2 2 2-1/2 2 (1) 2

(1) 2-1/2 2 (1) 2

(1) 2-1/2

NOTES: Valve manufacturers are Kunkle, Consolidated or Conbraco, depending on availability. This table revised 04/2012.

Table A1-14. Steam Boiler Safety Valve Openings

VALVE

SETTING

30 PSIG HW 60 PSIG HW 100 PSIG HW 125 PSIG HW

BOILER HP

NO. OF

VALVES

REQ'D

OUTLET

SIZE

(IN.)

NO. OF

VALVES

REQ'D

OUTLET

SIZE

(IN.)

NO. OF

VALVES

REQ'D

OUTLET

SIZE

(IN.)

NO. OF

VALVES

REQ'D

OUTLET

SIZE

(IN.)

125 1 2-1/2 1 2 1 2 1 1-1/4

150 1 2-1/2 1 2-1/2 1 2 1 2

200 2 (1) 2-1/2

(1) 1-1/4 1 2-1/2 1 2 1 2

250 2 (1) 2

(1) 2-1/2 1 2-1/2 1 2-1/2 1 2

300 2 2-1/2 2 (1) 1

(1) 2-1/2 1 2-1/2 1 2-1/2

350 3 (2) 2-1/2

(1) 1 2 (1) 2-1/2

(1) 2 1 2-1/2 1 2-1/2

400 3 (1) 2

(2) 2-1/2 2 (1) 2

(2) 2-1/2 2 (1) 1

(1) 2-1/2 1 2-1/2

500 4 (1) 1

(3) 2-1/2 2 2-1/2 2 (1) 2-1/2

(1) 1-1/4 2 (1) 1

(1) 2-1/2

600 4 (3) 2-1/2

(1) 2 3 (1) 1-1

(2) 2-1/2 2 (1) 2

(1) 2-1/2 2 (1) 2-1/2

(1) 1-1/4

700, 750 & 800 5 (1) 1

(4) 2-1/2 3 (1) 2

(2) 2-1/2 2 2-1/2 2 (1) 2-1/2

(1) 2

NOTES: Hot water relief valves are Kunkle #537.

Table A1-15. Hot Water Boiler Relief Valve Openings

21 Rev. 2 13

BOILER HP A B C D E F G X1 X2 X3

125 6 9 112 39-1/2 57-1/2 4 44-1/2 10 9-3/4 22-1/2

150 6 9 136 39-1/2 57-1/2 4 44-1/2 10 9-3/4 22-1/2

200 6 9 167 39-1/2 57-1/2 4 44-1/2 10 9-3/4 22-1/2

250 6 12 131 46 70 4 56 10 22 22-1/2

300 6 12 158 46 70 4 56 10 22 22-1/2

350 6 12 188 46 70 4 56 10 22 22-1/2

NOTE:

All numbers in table are in inches.

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

Figure A1-7. Space Required to Open Rear Head on Model CB-LE Boilers Equipped with Davits

BOILER HP

DIMENSIONS (INCHES)

A B C D E

CB-125 THRU CB-200 33 55 45 68 32

CB-250 THRU CB-350 42 69 58 86 43

CB-400 THRU CB-800 51 88 71 109 53

Figure A1-8. Model CB-LE Boiler Mounting Piers (60” and 78”)

22 Rev. 2 13

BOILER HP A B C D E F G

400 6 14 134 50 78 6-1/2 58-7/8

500 6 14 155 50 78 6-1/2 58-7/8

600 6 14 187 50 78 6-1/2 58-7/8

700-750-800 6 14 220 50 78 6-1/2 58-7/8

NOTE:

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 in-creased inspection accessibility to the piping beneath the boiler and added height for washing down the area beneath the boiler.

Figure A1-9. Model CB-LE Boiler Mounting Piers (96”)

CBLE 250-350HP

CBLE 400-800HP

Motor HP Hole Number

7.5 1 15 1 25 2 40 3

Motor HP Hole Number 10 1 20 1 30 2 50 2 75 3

Figure A1-10. Front Davit Support

23 Rev. 2 13

NEAR

SIDE

VIEW B

FAR

SIDE

FRONT

FLANGE

VIEW A

E DIA. HOLE

A

CL

B

D D

C

BOILER

HP

VIE

W

ALL DIMENSIONS IN INCHES

A B C D E

125 All B 80-1/4 29-3/4 70-1/2 10 3

150 All B 80-1/4 29-3/4 83-1/2 10 3

200 All B 80-1/4 29-3/4 114-1/2 10 3

Steam B 99 36 72 10 3

Hot Water B 99 36 81 10 3

Steam B 99 36 99 10 3

Hot Water B 99 36 108 10 3

Steam B 99 36 129 10 3

Hot Water B 99 36 138 10 3

Steam B 119 35-3/4 78 11 3

Hot Water B 119 35-3/4 78 11 3

Steam B 119 35-3/4 99 11 3

Hot Water B 119 35-3/4 99 11 3

Steam B 119 35-3/4 131 11 3

Hot Water B 119 35-3/4 131 11 3

700, 750 &

Steam B 119 35-3/4 164 11 3

Hot Water B 119 35-3/4 164 11 3

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

Figure A1-11. Lifting Lug Location, Model CB-LE Boilers

24 Rev. 2 13

PERFORMANCE DATA

The Low Emission Option provides NOx reduction at current published and predicted fuel-to-steam efficiencies.

Specifying Boiler Efficiency

Cleaver-Brooks offers an industry leading fuel-to-steam boiler efficiency guarantee for Model CB-LE 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-7768 for a detailed description of efficiency calculations).

When specifying the efficiencies in the tables, be sure to include the specific guarantee conditions to maximize the effectiveness of your efficiency specification. If you have any questions regarding the efficiency specifications, please contact your local Cleaver-Brooks authorized representative.

Efficiency Specification

The boiler manufacturer shall guarantee that, at the time of startup, the boiler will achieve fuel-to-steam efficiency (as shown in Table A1-16 and Table A1-17) 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:

• 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

No. 6 Oil

Carbon,% (wt) = 86.6 Hydrogen,% (wt) = 10.9 Sulfur,% (wt) = 2.09 Heating value, Btu/lb. = 18,830

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 manufacturer’s published radiation and convection losses. (For Cleaver-Brooks radiation and convection losses, see Boiler Efficiency Facts Guide, publication number CB-7767).

4. Any efficiency verification testing will be based on the stack loss method.

For efficiencies and stack temperatures at operating pressures not listed, follow these procedures:

25 Rev. 2 13

When the operating steam pressure is between 10 psig and 125 psig, interpolate the values from the efficiency tables.

When the operating steam pressure is above 125 psig, estimated efficiency can be calculated as follows:

Example:

Boiler: 350 hp.

Fuel: natural gas.

Operating steam pressure: 200 psig.

Find the fuel-to-steam efficiency at 100% firing rate. From Table A1-16 for a 350 hp boiler operating at 100% firing rate and an operating steam pressure of 125 psig, the efficiency is 82.5%.

Using Figure A1-12, note that the stack temperature increases 36 °F at the higher operating pressure. To estimate boiler efficiency, use this rule of thumb: For every 40 °F increase in stack temperature, efficiency decreases by 1%. Since the stack temperature rise is 36 °F, the decrease in the boiler efficiency at 200 psig operating pressure is calculated as follows: 36/40 =.9%. Therefore, the boiler efficiency at 200 psig operating pressure is 82.5 -.9 = 81.6%

Emissions The emission data included in this section consists of typical emission levels for Model CB boilers equipped with 60, 30, 25, and 20 ppm LE Options when firing natural gas and No. 2 oil.

Notice The data in Table A1-18 and Table A1-19 represent typical emission levels only.

Guaranteed emission levels are available from your local Cleaver-Brooks authorized representative.

26 Rev. 2 13

BOILER

HP

OPERATING PRESSURE = 10 psig OPERATING PRESSURE = 125 psig

% OF LOAD % OF LOAD

25% 50% 75% 100% 25% 50% 75% 100%

125 83.3 83.6 83.4 83.2 80.4 80.9 81.0 81.0

150 84.4 84.6 84.5 84.3 81.5 82.0 82.0 82.1

200 85.0 85.3 85.1 84.9 82.2 82.7 82.7 82.7

250 85.0 84.7 84.0 83.3 82.0 82.0 81.6 81.3

300 85.3 85.3 84.6 83.9 82.6 82.7 82.2 81.9

350 85.3 85.7 85.2 84.5 82.6 83.2 82.8 82.5

400 84.5 84.7 84.6 84.4 81.8 82.2 82.4 82.2

500 85.5 85.7 85.5 85.2 82.8 83.2 83.3 83.1

600 85.7 86.0 85.8 85.6 82.9 83.5 83.6 83.5

700 85.7 86.2 86.0 85.7 83.0 83.6 83.6 83.6

750, 800 85.8 86.1 85.9 85.6 83.1 83.6 83.7 83.5

Table A1-16. Predicted Fuel-to-Steam Efficiencies - Natural Gas

Figure A1-12. Predicted Stack Temperature Increase for Pressure Greater Than 125 psig

27 Rev. 2 13

Table A1-18. CB-LE Boilers - Natural Gas, Emission Levels

POLLUTANT

ESTIMATED LEVEL

60 ppm 30 ppm 25 ppm 20 ppm 15 ppm 9 ppm

CO

ppmA lb./MMBtu 50/150B

0.04/0.11 50/150B

0.04/0.11 50/150B

0.04/0.11 50/150B

0.04/0.11

0.04

0.04

NOx ppmA lb/MMBtu

0.07

0.035

0.03

0.024

0.018

0.011

SOx ppmA lb/MMBtu

0.001

0.001

0.001

0.001

0.001

0.001

HC/VOC5

ppmA lb/MMBtu

0.004

0.004

0.004

0.004

0.004

0.004

PM

ppmA lb/MMBtu

0.01

0.01

0.01

0.01

0.01

0.01

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

B. CO emission for 60, 30, 25 & 20 ppm system is 50 ppm (0.04 lb/MMBtu) when boiler is operating above 50% of rated capacity.

CO emission is 150 ppm (0.11 lb/MMBtu) when boiler is operating below 50% of rated capacity.

Table A1-17. Predicted Fuel-to-Steam Efficiencies - No. 2 Oil

BOILER

HP

OPERATING PRESSURE = 10 psig OPERATING PRESSURE = 125 psig

% OF LOAD % OF LOAD

25% 50% 75% 100% 25% 50% 75% 100%

125 86.7 86.9 86.7 86.6 83.7 84.2 84.3 84.3

150 87.8 88.0 87.8 87.6 84.8 85.3 85.3 85.4

200 88.4 88.7 88.4 88.2 85.6 86.0 86.0 86.0

250 88.3 88.1 87.4 86.7 85.3 85.3 84.9 84.7

300 88.6 88.7 88.0 87.3 85.9 86.0 85.5 85.2

350 88.6 89.0 88.5 87.8 85.9 86.6 86.1 85.8

400 87.9 88.1 87.9 87.6 85.1 85.5 85.6 85.5

500 88.9 89.0 88.9 88.6 86.1 86.5 86.6 86.4

600 89.0 89.4 89.2 89.0 86.2 86.8 86.9 86.8

700 89.1 89.5 89.3 89.1 86.3 86.9 87.0 86.9

750, 800 89.2 89.5 89.3 89.0 86.4 86.9 87.0 86.8

Table A1-19. CB-LE Boilers - No. 2 Oil, Emission Levels

POLLUTANT

ESTIMATED LEVEL

60 ppm LE Option 30, 25, 20 ppm LE Option 15 ppm 9 ppm

CO

ppmA lb/MMBtu

0.039

0.039

0.039

0.039

NOx ppmA lb/MMBtu

0.186

0.120

0.113

0.093

SOx ppmA lb/MMBtu 0.52

0.52

0.52

0.52

HC/VOCs ppmA 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% by weight.

Sulfur content = 0.5% by weight.

Ash content = 0.01% by weight.

09-09

28 Rev. 2 13

ENGINEERING DATA

Sound Level Table A1-20 gives a summary of predicted sound pressure levels for Model CB boilers with 30 ppm LE Options. Contact your local Cleaver-Brooks authorized representative for sound levels or other LE Options.

Units - The units for the sound level tables are dbA (decibels, measured on the A-weighted scale) in reference to 0.0002 microbars (20 micro-Newtons per square meter). Their reference are standardly used in specifying and reporting sound pressure levels on industrial equipment.

Test Method - The sound pressure levels in the above tables were obtained from tests in accordance with the “ABMA Test Code for the Measurement of Sound from Packaged Boilers”. In accordance with this code the sound pressure levels reported were measured on the boiler centerline 4-1/2 feet vertically above the bottom of the base rails and 3 feet horizontally in front of the end of the blower motor or front surface of the electrical cabinet.

Sound Level Meter - The sound level meter used complies with ANSI S1.4, Type 1 (Precision). The readings are taken with the meter set for slow response and corrected for background levels.

Sound Pressure - The large size boilers, the need for auxiliary equipment, and the necessary interconnecting piping make it impractical (and sometimes impossible) to provide a boiler testing environment which is suitable for taking the data needed to develop Sound Pressure Power levels.

Typical Values - Sound pressure levels (dbA) for the same boiler will vary between boiler rooms. Sound levels will vary with motor type, NOx levels, and altitudes. In addition, variations will occur between different people using different sound meters on the same boiler. And finally, no two boilers can be expected to give precisely the same sound levels. For these reasons, we can only predict, but not guarantee, sound levels (dbA).

BOILER HP 125 150 200 250 300 350 400 500 600 700 750 800

HFO, dbA 84 84 84 83 84 85 84 85 85 88 89 90

LFO, dbA 82 82 83 81 82 83 82 83 83 84 87 89

HFG, dbA 82 82 83 82 83 84 83 83 85 87 89 90

LFG, dbA 81 81 82 81 82 83 81 81 82 84 86 88

NOTES

1. Sound pressure levels measured on boilers operating in various locations and ex-pressed in dbA are as shown:

2. Based on standard altitude fans and fan motors, 60 Hz.

3. Contact your local Cleaver-Brooks authorized representative for sound levels of 60, 25, or 20 ppm LE Options.

ABBREVIATIONS:

HF = High Fire LF = Low Fire O = Oil G = Gas

Table A1-20. Model CBLE Predicted Sound Levels 30 ppm NOx Systemss

29 Rev. 2 13

Gas-Fired Burners Table A1-21 shows gas pressure with standard, over- and undersized gas trains.

Table A1-22 shows minimum required gas pressure altitude conversion.

Figure A1-13 shows standard gas train sizes and locations for Model CB Firetube Boilers.

Figure A1-14 shows typical gas train piping layouts for multiple boiler applications.

Figure A1-15 shows standard gas train components.

30 Rev. 2 13

Table A1-21. Standard, Undersize, and Oversize Gas Trains

CBLE

BOILER HP GAS TRAIN

SIZE

UPSTREAM

VALVE*

DOWNSTREAM

VALVE*

EMISSIONS LEVEL

09 ppm 15 ppm 20 ppm 30 ppm 60 ppm UC

125 HP 1.5 in BB BB 3.3 - 4.9 psi 3.3 - 4.9 psi 0.8 - 5.0 psi 0.7 - 5.0 psi 0.7 - 5.0 psi 0.7 - 5.0 psi 125 HP 1.5 in PC PC 3.4 - 5.0 psi 3.4 - 5.0 psi 0.9 - 5.0 psi 0.8 - 5.0 psi 0.8 - 5.0 psi 0.8 - 5.0 psi 125 HP 2.0 in BB BB 3.1 - 3.3 psi 3.1 - 3.3 psi 0.6 - 0.8 psi 0.6 - 0.7 psi 0.5 - 0.7 psi 0.5 - 0.7 psi 125 HP 2.0 in PC PC 3.1 - 3.4 psi 3.1 - 3.4 psi 0.6 - 0.9 psi 0.6 - 0.8 psi 0.6 - 0.8 psi 0.5 - 0.8 psi 125 HP 2.5 in PC PC 3.0 - 3.1 psi 3.0 - 3.1 psi 0.4 - 0.6 psi 0.4 - 0.6 psi 0.4 - 0.5 psi 0.4 - 0.5 psi 125 HP 3.0 in PC PC 2.9 - 3.0 psi 2.9 - 3.0 psi 0.4 - 0.4 psi 0.4 - 0.4 psi 0.4 - 0.4 psi 0.3 - 0.4 psi 125 HP 4.0 in PC PC 2.9 - 2.9 psi 2.9 - 2.9 psi 0.4 - 0.4 psi 0.3 - 0.4 psi 0.3 - 0.4 psi 0.3 - 0.3 psi

150 HP 1.5 in BB BB 3.7 - 5.5 psi 3.9 - 5.8 psi 1.0 - 4.7 psi 0.9 - 5.0 psi 0.9 - 5.0 psi 0.9 - 5.0 psi 150 HP 1.5 in PC PC 3.8 - 5.7 psi 4.0 - 6.0 psi 1.1 - 4.2 psi 1.1 - 5.0 psi 1.0 - 5.0 psi 1.0 - 5.0 psi 150 HP 2.0 in BB BB 3.4 - 3.7 psi 3.6 - 3.9 psi 0.7 - 1.0 psi 0.6 - 0.9 psi 0.6 - 0.9 psi 0.6 - 0.9 psi 150 HP 2.0 in PC PC 3.4 - 3.8 psi 3.6 - 4.0 psi 0.7 - 1.1 psi 0.7 - 1.1 psi 0.7 - 1.0 psi 0.6 - 1.0 psi 150 HP 2.5 in PC PC 3.2 - 3.4 psi 3.4 - 3.6 psi 0.5 - 0.7 psi 0.4 - 0.6 psi 0.4 - 0.6 psi 0.4 - 0.6 psi 150 HP 3.0 in PC PC 3.2 - 3.2 psi 3.4 - 3.4 psi 0.4 - 0.5 psi 0.4 - 0.4 psi 0.4 - 0.4 psi 0.3 - 0.4 psi 150 HP 4.0 in PC PC 3.1 - 3.2 psi 3.3 - 3.4 psi 0.4 - 0.4 psi 0.3 - 0.4 psi 0.3 - 0.4 psi 0.3 - 0.3 psi

200 HP 1.5 in BB BB 4.6 - 6.9 psi 5.0 - 7.5 psi 1.6 - 5.0 psi 1.5 - 5.0 psi 1.5 - 5.0 psi 200 HP 1.5 in PC PC 4.8 - 7.2 psi 5.2 - 7.8 psi 1.8 - 5.0 psi 1.7 - 5.0 psi 1.7 - 5.0 psi 200 HP 2.0 in BB BB 4.1 - 4.6 psi 4.5 - 5.0 psi 1.0 - 1.6 psi 1.0 - 1.5 psi 1.0 - 1.5 psi 200 HP 2.0 in PC PC 4.1 - 4.8 psi 4.5 - 5.2 psi 1.1 - 1.8 psi 1.1 - 1.7 psi 1.0 - 1.7 psi 200 HP 2.5 in PC PC 3.8 - 4.1 psi 4.2 - 4.5 psi 0.7 - 1.0 psi 0.7 - 1.0 psi 0.6 - 1.0 psi 200 HP 3.0 in PC PC 3.6 - 3.8 psi 4.0 - 4.2 psi 0.6 - 0.7 psi 0.5 - 0.7 psi 0.5 - 0.6 psi 200 HP 4.0 in PC PC 3.6 - 3.6 psi 4.0 - 4.0 psi 0.5 - 0.6 psi 0.5 - 0.5 psi 0.4 - 0.5 psi

250 HP 1.5 in BB BB 4.1 - 6.2 psi 4.4 - 6.7 psi 2.4 - 5.0 psi 2.4 - 2.7 psi 2.4 - 2.6 psi 2.3 - 2.6 psi 250 HP 1.5 in PC PC 4.5 - 6.7 psi 4.8 - 7.2 psi 2.8 - 5.0 psi 2.7 - 2.8 psi 2.7 - 2.7 psi 2.7 - 2.7 psi 250 HP 2.0 in BB BB 3.3 - 3.8 psi 3.7 - 4.1 psi 1.6 - 2.4 psi 1.6 - 2.4 psi 1.6 - 2.4 psi 1.5 - 2.3 psi 250 HP 2.0 in PC PC 3.4 - 4.0 psi 3.7 - 4.3 psi 1.7 - 2.8 psi 1.7 - 2.7 psi 1.6 - 2.7 psi 1.6 - 2.7 psi 250 HP 2.5 in PC PC 2.9 - 3.3 psi 3.2 - 3.7 psi 1.1 - 1.6 psi 1.1 - 1.6 psi 1.1 - 1.6 psi 1.0 - 1.5 psi 250 HP 3.0 in PC PC 2.7 - 2.9 psi 3.1 - 3.2 psi 0.9 - 1.1 psi 0.9 - 1.1 psi 0.9 - 1.1 psi 0.9 - 1.0 psi 250 HP 4.0 in PC PC 2.6 - 2.7 psi 2.9 - 3.1 psi 0.8 - 0.9 psi 0.8 - 0.9 psi 0.8 - 0.9 psi 0.8 - 0.9 psi

300 HP 1.5 in - 2.0 in BB BB 5.5 - 8.3 psi 5.7 - 8.5 psi 3.0 - 5.0 psi 3.0 - 3.6 psi 3.0 - 3.5 psi 3.0 - 3.5 psi 300 HP 1.5 in - 2.0 in PC PC 5.8 - 8.7 psi 6.0 - 9.0 psi 3.3 - 5.0 psi 3.3 - 3.7 psi 3.3 - 3.6 psi 3.3 - 3.6 psi 300 HP 2.0 in BB BB 4.6 - 5.5 psi 4.7 - 5.7 psi 2.1 - 3.0 psi 2.1 - 3.0 psi 2.0 - 3.0 psi 2.0 - 3.0 psi 300 HP 2.0 in PC PC 4.7 - 5.8 psi 4.8 - 6.0 psi 2.2 - 3.3 psi 2.2 - 3.3 psi 2.1 - 3.3 psi 2.1 - 3.3 psi 300 HP 3.0 in PC PC 3.9 - 4.6 psi 4.0 - 4.7 psi 1.3 - 2.1 psi 1.3 - 2.1 psi 1.2 - 2.0 psi 1.2 - 2.0 psi 300 HP 4.0 in PC PC 3.7 - 3.9 psi 3.9 - 4.0 psi 1.1 - 1.3 psi 1.1 - 1.3 psi 1.0 - 1.2 psi 1.0 - 1.2 psi

350 HP 1.5 in - 2.0 in BB BB 6.4 - 9.0 psi 6.2 - 9.0 psi 4.2 - 5.0 psi 4.2 - 5.0 psi 4.1 - 5.0 psi 4.1 - 5.0 psi 350 HP 1.5 in - 2.0 in PC PC 6.8 - 9.0 psi 6.6 - 9.0 psi 4.6 - 5.0 psi 4.6 - 5.0 psi 4.5 - 5.0 psi 4.5 - 5.0 psi 350 HP 2.0 in BB BB 5.4 - 6.4 psi 5.3 - 6.2 psi 3.2 - 4.2 psi 3.2 - 4.2 psi 3.2 - 4.1 psi 3.1 - 4.1 psi 350 HP 2.0 in PC PC 5.6 - 6.8 psi 5.4 - 6.6 psi 3.4 - 4.6 psi 3.4 - 4.6 psi 3.3 - 4.5 psi 3.3 - 4.5 psi 350 HP 2.5 in PC PC 4.3 - 5.4 psi 4.2 - 5.3 psi 2.1 - 3.2 psi 2.1 - 3.2 psi 2.0 - 3.2 psi 2.0 - 3.1 psi 350 HP 3.0 in PC PC 4.0 - 4.3 psi 3.8 - 4.2 psi 1.7 - 2.1 psi 1.7 - 2.1 psi 1.7 - 2.0 psi 1.6 - 2.0 psi 350 HP 4.0 in PC PC 3.7 - 4.0 psi 3.6 - 3.8 psi 1.5 - 1.7 psi 1.5 - 1.7 psi 1.4 - 1.7 psi 1.4 - 1.6 psi

400 HP 1.5 in - 2.0 in BB BB 6.9 - 9.0 psi 6.9 - 9.0 psi 4.6 - 5.0 psi 4.6 - 5.0 psi 4.5 - 5.0 psi 4.5 - 5.0 psi 400 HP 1.5 in - 2.0 in PC PC 7.4 - 9.0 psi 7.5 - 9.0 psi 5.1 - 8.7 psi 5.1 - 7.7 psi 5.1 - 7.7 psi 5.1 - 7.7 psi 400 HP 2.0 in BB BB 5.5 - 6.9 psi 5.6 - 6.9 psi 3.2 - 4.6 psi 3.2 - 4.6 psi 3.2 - 4.5 psi 3.2 - 4.5 psi 400 HP 2.0 in PC PC 5.7 - 7.4 psi 5.8 - 7.5 psi 3.4 - 5.0 psi 3.4 - 5.0 psi 3.4 - 5.0 psi 3.4 - 5.0 psi 400 HP 2.5 in PC PC 4.1 - 5.5 psi 4.2 - 5.6 psi 1.8 - 3.2 psi 1.8 - 3.2 psi 1.8 - 3.2 psi 1.8 - 3.2 psi 400 HP 3.0 in PC PC 3.7 - 4.1 psi 3.8 - 4.2 psi 1.3 - 1.8 psi 1.3 - 1.8 psi 1.3 - 1.8 psi 1.3 - 1.8 psi 400 HP 4.0 in PC PC 3.4 - 3.7 psi 3.5 - 3.8 psi 1.1 - 1.3 psi 1.0 - 1.3 psi 1.0 - 1.3 psi 1.0 - 1.3 psi

500 HP 2.0 in - 2.5 in BB PC 5.8 - 7.6 psi 5.8 - 7.6 psi 4.6 - 5.0 psi 4.6 - 5.0 psi 4.5 - 5.0 psi 4.5 - 5.0 psi

31 Rev. 2 13

* BB = Butter Ball; PC = Plug Cock

NOTE: In cases where the gas train increases in size after the regulating valve, two diameters are listed. The first number is the customer connection size.

500 HP 2.0 in - 2.5 in PC PC 6.0 - 8.3 psi 6.0 - 8.3 psi 4.8 - 5.0 psi 4.7 - 5.0 psi 4.7 - 5.0 psi 4.7 - 5.0 psi 500 HP 2.5 in PC PC 3.9 - 5.8 psi 3.9 - 5.8 psi 2.7 - 4.6 psi 2.7 - 4.6 psi 2.7 - 4.5 psi 2.6 - 4.5 psi 500 HP 3.0 in PC PC 3.3 - 3.9 psi 3.3 - 3.9 psi 2.0 - 2.7 psi 2.0 - 2.7 psi 2.0 - 2.7 psi 2.0 - 2.6 psi 500 HP 4.0 in PC PC 2.8 - 3.3 psi 2.8 - 3.3 psi 1.6 - 2.0 psi 1.6 - 2.0 psi 1.5 - 2.0 psi 1.5 - 2.0 psi

600 HP 2.0 in - 2.5 in BB PC 8.0 - 9.0 psi 8.0 - 9.0 psi 6.5 - 9.0 psi 6.5 - 9.0 psi 6.4 - 8.9 psi 6.3 - 8.8 psi 600 HP 2.0 in - 2.5 in PC PC 8.2 - 9.0 psi 8.2 - 9.0 psi 6.7 - 10.0 psi 6.7 - 10.0 psi 6.6 - 9.9 psi 6.6 - 9.9 psi 600 HP 2.5 in PC PC 5.4 - 8.0 psi 5.4 - 8.0 psi 3.9 - 5.0 psi 3.8 - 5.0 psi 3.8 - 5.0 psi 3.7 - 5.0 psi 600 HP 2.5 in - 3.0 in PC PC 5.2 - 5.4 psi 5.2 - 5.4 psi 3.7 - 3.9 psi 3.6 - 3.8 psi 3.5 - 3.8 psi 3.5 - 3.7 psi 600 HP 3.0 in PC PC 4.3 - 5.2 psi 4.3 - 5.2 psi 2.8 - 3.7 psi 2.7 - 3.6 psi 2.7 - 3.5 psi 2.6 - 3.5 psi 600 HP 4.0 in PC PC 3.7 - 4.3 psi 3.7 - 4.3 psi 2.2 - 2.8 psi 2.1 - 2.7 psi 2.0 - 2.7 psi 2.0 - 2.6 psi

700 HP 2.0 in - 3.0 in BB PC 11.0 - 15.0 psi 10.7 - 15.0 psi 8.7 - 13.1 psi 8.6 - 13.0 psi 8.6 - 12.9 psi 8.6 - 12.8 psi 700 HP 2.0 in - 3.0 in PC PC 11.3 - 15.0 psi 11.0 - 15.0 psi 9.0 - 13.5 psi 8.9 - 13.4 psi 8.9 - 13.4 psi 8.9 - 13.3 psi 700 HP 2.5 in - 3.0 in PC PC 7.1 - 9.0 psi 6.8 - 9.0 psi 4.8 - 5.0 psi 4.7 - 5.0 psi 4.7 - 5.0 psi 4.6 - 5.0 psi 700 HP 3.0 in PC PC 6.0 - 7.1 psi 5.7 - 6.8 psi 3.6 - 4.8 psi 3.6 - 4.7 psi 3.5 - 4.7 psi 3.5 - 4.6 psi 700 HP 4.0 in PC PC 5.1 - 6.0 psi 4.8 - 5.7 psi 2.8 - 3.6 psi 2.7 - 3.6 psi 2.7 - 3.5 psi 2.6 - 3.5 psi

800 HP 2.0 in - 3.0 in BB PC 10.8 - 15.0 psi 10.7 - 15.0 psi 10.6 - 15.0 psi 800 HP 2.0 in - 3.0 in PC PC 11.2 - 15.0 psi 11.1 - 15.0 psi 11.0 - 15.0 psi 800 HP 2.5 in - 3.0 in PC PC 6.1 - 9.0 psi 6.0 - 10.0 psi 5.9 - 10.0 psi 800 HP 3.0 in PC PC 4.8 - 6.1 psi 4.7 - 5.0 psi 4.6 - 5.0 psi 800 HP 4.0 in PC PC 3.5 - 4.8 psi 3.4 - 4.7 psi 3.4 - 4.6 psi

Standard Gas Train size is highlighted

Table A1-21. Standard, Undersize, and Oversize Gas Trains (Continued)

CBLE

BOILER HP GAS TRAIN

SIZE

UPSTREAM

VALVE*

DOWNSTREAM

VALVE*

EMISSIONS LEVEL

09 ppm 15 ppm 20 ppm 30 ppm 60 ppm UC

32 Rev. 2 13

A

PLAN VIEW

BOILER

FRONT

ALTITUDE

(FT)

CORRECTION

FACTOR

ALTITUDE

(FT)

CORRECTION

FACTOR

1000 1.04 6000 1.25

2000 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 700 feet, 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 A1-22. Minimum Required Regulated Gas Pressure Altitude Conversion

BOILER

HP

TYPE OF GAS AND HEAT CONTENT

NATURAL GAS

1000 (Btu/cu-ft)

PROPANE GAS

2550 (Btu/cu-ft)

125 5103 2000

150 6124 2402

200 8165 3202

250 10206 4002

300 12247 4802

350 14280 5600

400 16329 6404

500 20415 8006

600 24494 9605

700 28576 11206

750 30618 12007

800 32659 12807

Table A1-23. Maximum Gas Consumption (CFH) for Natural Gas and Propane Vapor

BOILER

HP

MODEL CB

CONNECTION

SIZE

(IN. NPT)

LOCATION

DIMENSION

“A” (IN.)

125-200 1-1/2 52

250-350 2 56

400 2 58

500 2-1/2 60

600 2-1/2 - 3 71

700-800 3 65

Figure A1-13. Standard Gas Train Connection Size and Location

33 Rev. 2 13

Oil-Fired Burners Fuel oil consumption information is shown on the boiler rating sheets in the Dimensions and Rating Section.

Figure A1-16 shows the oil connection sizes and locations for Model CB Boilers firing No. 2 oil.

Figure A1-17 through Figure A1-18 show typical oil systems and layouts.

Figure A1-19 and Figure A1-21 show the detail of an oil transfer tank (day tank) typically utilized to provide a storage reservoir between the oil system supply pump and the boiler oil pump.

General Boiler Information

Table A1-24 shows blowdown tank sizing information.

Table A1-25 provides heating surface information.

Table A1-26 provides steam volume and disengaging area information

Table A1-27 provides recommended steam nozzle sizes.

Table A1-28 provides recommended non-return valve sizes.

Boiler Room Information

Figure A1-22 shows typical boiler room length requirements.

Figure A1-23 shows typical boiler room width requirements.

Figure A1-24 shows typical breeching arrangements.

Stack Support Capabilities

All standard Cleaver-Brooks Firetube Boilers with an LE option can support up to 2,000 lbs without additional support.

LE Boilers 250 hp through 800 hp can be reinforced to support 3,000 lbs.

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 Model CB-LE is not required, it is necessary to size the stack/breeching to limit flue gas pressure variation. The allowable 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 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.

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 (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,…