PEERLESS_BOILER_SERES_211A.pdf

Peerless® Boilers

Series 211A™

Large Commercial Steam Boilers

Standard Equipment > Manual Reset High Limit Control

> Honeywell Operating Controls

> Injection Molded Flex-Seal Flow Port Gaskets

> Factory Assembled Gas Train to Meet

ANSI Z21.13

> Individual Draw Rods for Ease of Assembly

> Float and Probe Type LWCO

> Gauge Glass and Fittings

> Pressure Gauge

> 15 PSI Safety Valve

All commercial cast iron boilers include a full one-year warranty. A limited, ten-year warranty is provided for the cast iron sections of commercial steam boilers. Visit PeerlessBoilers.com for complete details.

Series 211A™ Boiler Features

■ Atmospheric Gas Fired, Commercial Cast Iron Boiler

■ Natural or LP Gas

■ 43 sizes, 4 – 46 sections; Available as Knockdown, Factory Assembled Sections or Factory Packaged

■ Boiler Efficiencies Compliant with Federal and ASHRAE 90.1 Requirements

■ Factory Assembled Gas Train to Meet ANSI Z21.13

■ Natural Draft (Chimney) Venting

■ Large Water Content

■ Built-in Horizontal to Vertical Draft Hood Provides Low Profile Design—Ideal for Installations with Low Ceilings

■ Exclusive Access Design—Accessibility to Flueways from Both Ends for Inspection and Cleaning without Removing Entire Jacket

Steam Piping

Steam Boiler Piping*

Boiler Model Number Header Risers Equalizer

211A-04 4" 1-4" 2-1/2"

211A-05 5" 1-5" 2-1/2"

211A-06 5" 1-5" 2-1/2"

211A-07 5" 1-5" 2-1/2"

211A-08 6" 2-4" 2-1/2"

211A-09 6" 2-5" 2-1/2"

211A-10 6" 2-5" 3"

211A-11 6" 2-5" 3"

211A-12 8" 2-5" 3"

211A-13 8" 2-5" 3"

211A-14 8" 2-5" 3"

211A-15 8" 2-6" 3"

211A-16 8" 2-6" 4"

211A-17 8" 2-6" 4"

211A-18 8" 2-6" 1-3" 4"

211A-19 8" 2-6" 1-3" 4"

211A-20 8" 2-6" 1-3" 4"

211A-21 8" 2-6" 1-3" 4"

211A-22 8" 2-6" 2-3" 4"

211A-23 8" 2-6" 2-3" 4"

211A-24 10" 2-6" 2-3" 4"

211A-25 10" 2-6" 3-3" 4"

211A-26 10" 2-6" 3-3" 4"

211A-27 10" 2-6" 4-3" 4"

211A-28 10" 2-6" 4-3" 5"

211A-29 10" 2-6" 5-3" 5"

211A-30 10" 2-6" 5-3" 5"

211A-31 10" 2-6" 6-3" 5"

211A-32 10" 2-6" 6-3" 5"

211A-33 10" 2-6" 7-3" 5"

211A-34 10" 2-6" 7-3" 5"

211A-35 10" 2-6" 7-3" 5"

211A-36 10" 2-6" 8-3" 5"

211A-37 10" 2-6" 8-3" 5"

211A-38 10" 2-6" 8-3" 5"

211A-39 10" 2-6" 9-3" 5"

211A-40 10" 2-6" 9-3" 5"

211A-41 10" 2-6" 10-3" 5"

211A-42 10" 2-6" 10-3" 5"

211A-43 10" 2-6" 11-3" 5"

211A-44 12" 2-6" 11-3" 5"

211A-45 12" 2-6" 12-3" 5"

211A-46 12" 2-6" 12-3" 5"

Pipe the return line to a Hartford Loop, with the return nipple located from 2 to 4 inches below the normal water line.

Boiler Specs

Boiler Model Number

Gas Connection Size

(Nat. Gas) Draft Hoods No. & Size

Flue Size to Stack

Chimney Size

Approx.

Shipping Weight

(lbs.)

211A-04 1" (1) 12" 12" 12" x 20' 2380

211A-05 1" (1) 12" 12" 12" x 20' 2900

211A-06 1-1/4" (1) 14" 14" 14" x 20' 3450

211A-07 1-1/4" (2) 12" 14" 14" x 20' 3900

211A-08 1-1/4" (2) 12" 15" 15" x 20' 4390

211A-09 1-1/2" (2) 12" 16" 16" x 20' 4875

211A-10 1-1/2" (2) 14" 17" 17" x 20' 5320

211A-11 2" (2) 14" 18" 18" x 20' 5900

211A-12 2" (3) 12" 18" 18" x 20' 6370

211A-13 2" (3) 12" 19" 19" x 20' 6800

211A-14 2" (3) 14" 20" 20" x 20' 7400

211A-15 2" (3) 14" 21" 21" x 20' 7950

211A-16 2" (3) 14" 21" 21" x 20' 8420

211A-17 2" (4) 14" 22" 22" x 20' 8900

211A-18 2-1/2" (4) 14" 23" 23" x 20' 9450

211A-19 (2) 2" (4) 14" 23" 23" x 20' 10000

211A-20 (2) 2" (4) 14" 24" 24" x 20'

211A-21 (2) 2" (4) 14" 25" 25" x 20'

211A-22 (2) 2" (5) 14" 25" 25" x 20'

211A-23 (2) 2" (5) 14" 26" 26" x 20'

211A-24 (2) 2" (5) 14" 26" 26" x 20'

211A-25 (2) 2" (5) 14" 27" 27" x 20'

211A-26 (2) 2" (5) 14" 27" 27" x 20'

211A-27 (2) 2" (6) 14" 28" 28" x 20'

211A-28 (2) 2" (6) 14" 29" 29" x 20'

211A-29 (2) 2" (6) 14" 29" 29" x 20'

211A-30 (2) 2" (6) 14" 30" 30" x 20'

211A-31 (2) 2" (6) 14" 30" 30" x 20'

211A-32 (2) 2" (7) 14" 31" 31" x 20'

211A-33 (2) 2" (7) 14" 31" 31" x 20'

211A-34 (2) 2-1/2" (7) 14" 32" 32" x 20'

211A-35 (2) 2-1/2" (7) 14" 32" 32" x 20'

211A-36 (2) 2" (7) 14" 33" 33" x 20'

Te c h n ic a l

In fo rm a ti o n

*Refer to 211A IOM for piping details

Front View Te c h n ic a l In fo rm a tio n

Boiler Dimensions

Boiler Model Number

Dimensions Length & Width Boiler

Section Length

Intermediate Riser Center Lines 3" Tappings – Used in Addition to Two End Risers (Dimension are Approximate) Flue Connection Center Lines

“A” “B” “C” “D” “E” “F” “G” “H” “I” “J” “K” “L” “M” “N” “O” “P” “AA” “BB” “CC” “DD” “EE” “FF” “GG” “HH” “II” “FF”

211A-04 28¹⁄₈" 38³⁄₈" 63" 21³⁄₄"

BOILER MODEL NUMBERS

211A-04-S TO 211A-17-S INCLUSIVE

DO NOT INCORPORATE

INTERMEDIATE TAPPED SECTIONS

10⁷⁄₈" 10⁷⁄₈" 211A-05 33³⁄₄" 44" 63" 27³⁄₈" 13³⁄₄" 13⁵⁄₈" 211A-06 39³⁄₈" 50¹⁄₄" 65" 33" 16¹⁄₂" 16¹⁄₂" 211A-07 45" 55⁷⁄₈" 63" 38⁵⁄₈" 10⁷⁄₈" 16⁷⁄₈" 10⁷⁄₈" 211A-08 50⁵⁄₈" 61³⁄₄" 63" 44¹⁄₄" 13³⁄₄" 19⁵⁄₈" 10⁷⁄₈" 211A-09 56¹⁄₄" 67⁵⁄₈" 63" 49⁷⁄₈" 13³⁄₄" 22¹⁄₂" 13⁵⁄₈" 211A-10 61⁷⁄₈" 73¹⁄₄" 65" 55¹⁄₂" 16¹⁄₂" 25³⁄₈" 13⁵⁄₈" 211A-11 67¹⁄₂" 80³⁄₄" 65" 61¹⁄₈" 16¹⁄₂" 28¹⁄₈" 16¹⁄₂" 211A-12 73¹⁄₈" 86³⁄₈" 63" 66³⁄₄" 13³⁄₄" 22¹⁄₂" 19⁵⁄₈" 10⁷⁄₈" 211A-13 78³⁄₄" 91¹⁄₂" 63" 72³⁄₈" 13³⁄₄" 22¹⁄₂" 22¹⁄₂" 13⁵⁄₈" 211A-14 84³⁄₈" 97¹⁄₈" 65" 78" 16¹⁄₂" 25³⁄₈" 22¹⁄₂" 13⁵⁄₈" 211A-15 90" 102³⁄₄" 65" 83⁵⁄₈" 16¹⁄₂" 25³⁄₈" 25¹⁄₄" 16¹⁄₂" 211A-16 95⁵⁄₈" 108³⁄₈" 65" 89¹⁄₄" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 16¹⁄₂" 211A-17 101¹⁄₄" 114¹⁄₄" 65" 94⁷⁄₈" 13³⁄₄" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 13⁵⁄₈" 211A-18 106⁷⁄₈" 120³⁄₈" 65" 100¹⁄₂" 53¹⁄₁₆" 47⁷⁄₁₆" 16¹⁄₂" 25³⁄₈" 22¹⁄₂" 22¹⁄₂" 13⁵⁄₈" 211A-19 112¹⁄₂" 139¹⁄₈" 65" 106¹⁄₈" 53¹⁄₁₆" 53¹⁄₁₆" 13³⁄₄" 25³⁄₈" 28¹⁄₈" 25¹⁄₄" 13⁵⁄₈" 211A-20 118¹⁄₈" 144³⁄₄" 65" 111³⁄₄" 58¹¹⁄₁₆" 53¹⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 25³⁄₈" 13⁵⁄₈" 211A-21 123³⁄₄" 150³⁄₈" 65" 117³⁄₈" 58¹¹⁄₁₆" 58¹¹⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 16¹⁄₂" 211A-22 129³⁄₈" 156" 65" 123" 41¹³⁄₁₆" 45" 36³⁄₁₆" 16¹⁄₂" 25³⁄₈" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 13⁵⁄₈" 211A-23 135" 161⁵⁄₈" 65" 128⁵⁄₈" 41¹³⁄₁₆" 45" 41¹³⁄₁₆" 16¹⁄₂" 28¹⁄₈" 25³⁄₈" 22¹⁄₂" 22¹⁄₂" 13⁵⁄₈" 211A-24 140⁵⁄₈" 166³⁄₈" 65" 134¹⁄₄" 47⁷⁄₁₆" 45" 41¹³⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 25³⁄₈" 22¹⁄₂" 13⁵⁄₈" 211A-25 146¹⁄₄" 172" 65" 139⁷⁄₈" 36³⁄₁₆" 33³⁄₄" 33³⁄₄" 36³⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 25³⁄₈" 13⁵⁄₈" 211A-26 151⁷⁄₈" 177⁵⁄₈" 65" 145¹⁄₂" 36³⁄₁₆" 33³⁄₄" 39³⁄₈" 36³⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 16¹⁄₂" 211A-27 157¹⁄₂" 183¹⁄₄" 65" 151¹⁄₈" 36³⁄₁₆" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 30⁹⁄₁₆" 16¹⁄₂" 28¹⁄₈" 25³⁄₈" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 13⁵⁄₈" 211A-28 163¹⁄₈" 188⁷⁄₈" 65" 156³⁄₄" 24¹⁵⁄₁₆" 33³⁄₄" 33³⁄₄" 33³⁄₄" 30⁹⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 25³⁄₈" 22¹⁄₂" 22¹⁄₂" 13⁵⁄₈" 211A-29 168³⁄₄" 194¹⁄₂" 65" 162³⁄₈" 24¹⁵⁄₁₆" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 24¹⁵⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 25³⁄₈" 22¹⁄₂" 13⁵⁄₈" 211A-30 174³⁄₈" 200¹⁄₈" 65" 168" 30⁹⁄₁₆" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 24¹⁵⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 25³⁄₈" 13⁵⁄₈" 211A-31 180" 205³⁄₄" 65" 173⁵⁄₈" 30⁹⁄₁₆" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 30⁹⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 16¹⁄₂" 211A-32 185⁵⁄₈" 211⁷⁄₈" 65" 179¹⁄₄" 30⁹⁄₁₆" 28¹⁄₈" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 30⁹⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 25³⁄₈" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 13⁵⁄₈" 211A-33 191¹⁄₄" 217¹⁄₂" 65" 184⁷⁄₈" 24¹⁵⁄₁₆" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 24¹⁵⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 25³⁄₈" 22¹⁄₂" 22¹⁄₂" 13⁵⁄₈" 211A-34 196⁷⁄₈" 223⁷⁄₈" 65" 190¹⁄₂" 24¹⁵⁄₁₆" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 28¹⁄₈" 22¹⁄₂" 22¹⁄₂" 24¹⁵⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 25³⁄₈" 22¹⁄₂" 13⁵⁄₈" 211A-35 202¹⁄₂" 229¹⁄₂" 65" 196¹⁄₈" 24¹⁵⁄₁₆" 22¹⁄₂" 22¹⁄₂" 28¹⁄₈" 28¹⁄₈" 22¹⁄₂" 22¹⁄₂" 24¹⁵⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 22¹⁄₂" 13⁵⁄₈" 211A-36 208¹⁄₈" 262" 65" 201³⁄₄" 24¹⁵⁄₁₆" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 19⁵⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 16¹⁄₂" 211A-37 213³⁄₄" 268" 65" 207³⁄₈" 24¹⁵⁄₁₆" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 24¹⁵⁄₁₆" 16¹⁄₂" 28¹⁄₈" 28¹⁄₈" 28¹⁄₈" 25³⁄₈" 22¹⁄₂" 22¹⁄₂" 22¹⁄₂" 13⁵⁄₈"

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Technical Information

CUT-211A R1 (1/13-3M)

Printed in U.S.A.

©2013 PB Heat, LLC. All rights reserved.

Boiler Ratings - Packaged

Series 211A™

Boiler Model Number

Natural Gas Ratings

Thermal Efficiency, Combustion Efficiency, Input, MBH

Output¹, MBH

Net Ratings²

Steam EDR, sqft

Steam, MBH

211A-04 630 486 1,521 365 77.1 79.8 211A-05 840 666 2,083 500 77.4 80.0 211A-06 1,050 816 2,550 612 77.7 80.0 211A-07 1,260 980 3,063 735 77.8 80.0 211A-08 1,470 1,145 3,579 859 77.9 80.0 211A-09 1,680 1,310 4,113 987 78.0 80.0 211A-10 1,890 1,476 4,688 1,125 78.1 80.0 211A-11 2,100 1,642 5,263 1,263 78.2 80.0 211A-12 2,310 1,806 5,829 1,399 78.2 80.0 211A-13 2,520 1,958 6,333 1,520 77.7 80.0 211A-14 2,730 2,124 6,871 1,649 77.8 80.0 211A-15 2,940 2,290 7,408 1,778 77.9 80.0 211A-16 3,150 2,454 7,938 1,905 77.9 80.0 211A-17 3,360 2,621 8,479 2,035 78.0 80.0 211A-18 3,570 2,785 9,008 2,162 78.0 80.0 211A-19 3,780 2,952 9,550 2,292 78.1 80.0

Natural Gas Ratings

Steam Water

Content, gal

Boiler H.P.

14.5 31.64

19.9 39.55

24.4 47.46

29.3 55.37

34.2 63.28

39.1 71.19

44.1 79.10

49.1 87.01

54.0 94.92

58.5 102.83

63.5 110.74

68.4 118.65

73.3 126.56

78.3 134.47

83.2 142.38

88.2 150.29

Boiler Ratings - Assembled Block or Individual Section

Boiler Model

Number

Natural Gas Ratings LP Gas (2500 Btu/cu. ft.; 93,000 kJ/m3)

Efficiency

Input Output¹

Net Ratings² Steam Piping Factor

Boiler H.P.

Input Output

Net Ratings² Steam Piping Factor

Boiler H.P.

Steam EDR Steam Steam EDR Steam Thml Cmb

MBH kW MBH kW Sq. Ft. m2 MBH kW MBH kW MBH kW Sq. Ft. m2 MBH kW % %

211A-04 630 185 486 142 1,521 141 365 107 1.333 14.5 615 180 474 139 1,483 138 356 104 1.333 14.2 77.1 79.8 211A-05 840 246 666 195 2,083 194 500 147 1.333 19.9 820 240 635 186 1,983 184 476 140 1.333 19.0 77.4 80.0 211A-06 1,050 308 816 239 2,550 237 612 179 1.333 24.4 1,025 300 796 233 2,488 231 597 175 1.333 23.8 77.7 80.0 211A-07 1,260 369 980 287 3,063 285 735 215 1.333 29.3 1,230 360 957 280 2,992 278 718 210 1.333 28.6 77.8 80.0 211A-08 1,470 431 1,145 336 3,579 332 859 252 1.333 34.2 1,435 421 1,118 328 3,496 325 839 246 1.333 33.4 77.9 80.0 211A-09 1,680 492 1,310 384 4,113 382 987 289 1.327 39.1 1,640 481 1,279 375 4,008 372 962 282 1.330 38.2 78.0 80.0 211A-10 1,890 554 1,476 433 4,688 436 1,125 330 1.312 44.1 1,845 541 1,441 422 4,567 424 1,096 321 1.315 43.0 78.1 80.0 211A-11 2,100 615 1,642 481 5,263 489 1,263 370 1.300 49.1 2,050 601 1,603 470 5,125 476 1,230 360 1.303 47.9 78.2 80.0 211A-12 2,310 677 1,806 529 5,829 542 1,399 410 1.291 54.0 2,255 661 1,763 517 5,679 528 1,363 399 1.293 52.7 78.2 80.0 211A-13 2,520 739 1,958 574 6,333 588 1,520 445 1.288 58.5 2,460 721 1,911 560 6,179 574 1,483 435 1.289 57.1 77.7 80.0 211A-14 2,730 800 2,124 622 6,871 638 1,649 483 1.288 63.5 2,665 781 2,073 608 6,704 623 1,609 472 1.288 61.9 77.8 80.0 211A-15 2,940 862 2,290 671 7,408 688 1,778 521 1.288 68.4 2,870 841 2,236 655 7,233 672 1,736 509 1.288 66.8 77.9 80.0 211A-16 3,150 923 2,454 719 7,938 737 1,905 558 1.288 73.3 3,075 901 2,395 702 7,746 720 1,859 545 1.288 71.5 77.9 80.0 211A-17 3,360 985 2,621 768 8,479 788 2,035 596 1.288 78.3 3,280 961 2,558 750 8,275 769 1,986 582 1.288 76.4 78.0 80.0 211A-18 3,570 1,046 2,785 816 9,008 837 2,162 634 1.288 83.2 3,485 1,021 2,718 797 8,792 817 2,110 618 1.288 81.2 78.0 80.0 211A-19 3,780 1,108 2,952 865 9,550 887 2,292 672 1.288 88.2 3,690 1,081 2,882 845 9,325 866 2,238 656 1.288 86.1 78.1 80.0 211A-20 3,990 1,169 3,116 913 10,079 936 2,419 709 1.288 93.1 3,895 1,142 3,042 892 9,842 914 2,362 692 1.288 90.9 78.1 80.0 211A-21 4,200 1,231 3,280 961 10,613 986 2,547 746 1.288 98.0 4,100 1,202 3,202 938 10,358 962 2,486 729 1.288 95.7 78.1 80.0 211A-22 4,410 1,292 3,449 1,011 11,158 1,037 2,678 785 1.288 103.0 4,305 1,262 3,367 987 10,892 1,012 2,614 766 1.288 100.6 78.2 80.0 211A-23 4,620 1,354 3,599 1,055 11,642 1,082 2,794 819 1.288 107.5 4,510 1,322 3,513 1,030 11,363 1,056 2,727 799 1.288 104.9 77.9 80.0 211A-24 4,830 1,416 3,763 1,103 12,175 1,131 2,922 856 1.288 112.4 4,715 1,382 3,673 1,076 11,883 1,104 2,852 836 1.288 109.7 77.9 80.0 211A-25 5,040 1,477 3,931 1,152 12,717 1,181 3,052 894 1.288 117.4 4,920 1,442 3,838 1,125 12,417 1,154 2,980 873 1.288 114.7 78.0 80.0 211A-26 5,250 1,539 4,095 1,200 13,246 1,231 3,179 932 1.288 122.3 5,125 1,502 3,998 1,172 12,933 1,202 3,104 910 1.288 119.4 78.0 80.0 211A-27 5,460 1,600 4,259 1,248 13,779 1,280 3,307 969 1.288 127.2 5,330 1,562 4,157 1,218 13,446 1,249 3,227 946 1.288 124.2 78.0 80.0 211A-28 5,670 1,662 4,428 1,298 14,325 1,331 3,438 1,008 1.288 132.3 5,535 1,622 4,323 1,267 13,983 1,299 3,356 984 1.288 129.1 78.1 80.0 211A-29 5,880 1,723 4,592 1,346 14,854 1,380 3,565 1,045 1.288 137.2 5,740 1,682 4,483 1,314 14,504 1,347 3,481 1,020 1.288 133.9 78.1 80.0 211A-30 6,090 1,785 4,756 1,394 15,388 1,430 3,693 1,082 1.288 142.1 5,945 1,742 4,643 1,361 15,021 1,395 3,605 1,057 1.288 138.7 78.1 80.0 211A-31 6,300 1,846 4,920 1,442 15,917 1,479 3,820 1,120 1.288 147.0 6,150 1,802 4,803 1,408 15,538 1,444 3,729 1,093 1.288 143.5 78.1 80.0 211A-32 6,510 1,908 5,084 1,490 16,446 1,528 3,947 1,157 1.288 151.9 6,355 1,862 4,963 1,455 16,054 1,491 3,853 1,129 1.288 148.3 78.1 80.0 211A-33 6,720 1,969 5,255 1,540 17,000 1,579 4,080 1,196 1.288 157.0 6,560 1,923 5,130 1,503 16,596 1,542 3,983 1,167 1.288 153.2 78.2 80.0 211A-34 6,930 2,031 5,419 1,588 17,529 1,628 4,207 1,233 1.288 161.9 6,765 1,983 5,290 1,550 17,113 1,590 4,107 1,204 1.288 158.0 78.2 80.0 211A-35 7,140 2,093 5,583 1,636 18,063 1,678 4,335 1,270 1.288 166.8 6,970 2,043 5,451 1,598 17,633 1,638 4,232 1,240 1.288 162.8 78.2 80.0 211A-36 7,350 2,154 5,748 1,685 18,596 1,728 4,463 1,308 1.288 171.7 7,175 2,103 5,611 1,644 18,150 1,686 4,356 1,277 1.288 167.6 78.2 80.0 211A-37 7,560 2,216 5,904 1,730 19,100 1,774 4,584 1,343 1.288 176.4 7,380 2,163 5,764 1,689 18,646 1,732 4,475 1,311 1.288 172.2 78.1 80.0 211A-38 7,770 2,277 6,068 1,778 19,629 1,824 4,711 1,381 1.288 181.3

BOILER MODEL NUMBERS 211A-38 TO

211A-46 ARE CERTIFIED FOR NATURAL GAS ONLY.

CONTACT THE FACTORY.

78.1 80.0 211A-39 7,980 2,339 6,232 1,826 20,163 1,873 4,839 1,418 1.288 186.2 78.1 80.0 211A-40 8,190 2,400 6,396 1,874 20,692 1,922 4,966 1,455 1.288 191.1 78.1 80.0 211A-41 8,400 2,462 6,560 1,923 21,221 1,971 5,093 1,493 1.288 196.0 78.1 80.0 211A-42 8,610 2,523 6,724 1,971 21,750 2,021 5,220 1,530 1.288 200.9 78.1 80.0 211A-43 8,820 2,585 6,888 2,019 22,283 2,070 5,348 1,567 1.288 205.8 78.1 80.0 211A-44 9,030 2,646 7,061 2,069 22,842 2,122 5,482 1,607 1.288 210.9 78.2 80.0 211A-45 9,240 2,708 7,226 2,118 23,375 2,172 5,610 1,644 1.288 215.9 78.2 80.0 211A-46 9,450 2,770 7,390 2,166 23,908 2,221 5,738 1,682 1.288 220.8 78.2 80.0

1 Gross Output Rating, Thermal Efficiency and Combustion Efficiency determined in accordance with AHRI requirements.

2 Net AHRI steam ratings based on allowance shown in table.

3 Consult factory before selecting a boiler for installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping systems, etc.

I. GENERAL REQUIREMENTS

A. The boiler(s) shall be of a low pressure, cast iron, atmospheric gas design and shall be tested and design certified to the current ANSI Z21.13 standard and listed in the International Approval Services Directory of A.G.A. and CGA Certified Appliances and Accessories.

B. The boiler(s) shall be capable of developing full A.G.A. listed gross output at 100% firing rate and shall include the A.G.A. Certification Seal for Appliances.

C. The boiler(s) shall be listed in the I=B=R Ratings Directory and shall bear the I=B=R Emblem.

D. The boiler(s) will be Peerless Model ____________________________ for (natural) (LP) gas with an A.G.A. Gross Output of _________________ MBH and a Net I=B=R (Water) (Steam) Rating of __________________ MBH.

E. The boiler(s) shall be constructed in accordance with the provisions of Section IV of the ASME Boiler and Pressure Vessel Code and shall be stamped with the required ASME symbol. Each boiler section shall be hydrostatically pressure tested for a maximum allowable working pressure of (50) (80) PSIG for water and 15 PSIG for steam.

F. The boiler(s) shall be field assembled and hydrostatically tested in accordance with the manufacturer’s installation instructions. All work shall be completed in a neat and workmanlike manner.

G. Optional Factory Assembled Sections:

The boiler(s) shall be provided with factory assembled sections. The sections shall be assembled with individual draw rods and flow port gaskets. High temperature sealing rope shall be used to provide a permanent gas-tight seal between the sections. The boiler(s) shall be hydrostatically tested in accordance with Section IV of the ASME Boiler and Pressure Vessel Code for a maximum allowable working pressure of (50) (80) PSIG for water and 15 PSIG for steam.

H. Optional Factory Packaged Boilers:

The boiler(s) shall be factory packaged with jacket, burners, trim and controls mounted and wired. The sections shall be assembled with individual draw rods and flow port gaskets. High temperature sealing rope shall be used to provide a permanent gas-tight seal between the sections. The boiler(s) shall be hydrostatically tested in accordance with Section IV of the ASME Boiler and Pressure Vessel Code for a maximum allowable working pressure of (50) (80) PSIG for water and 15 PSIG for steam. The boiler(s) shall be fire-tested (optional) for a functional check of all components prior to shipment.

II. BOILER CONSTRUCTION FEATURES

A. The boiler sections shall be assembled using individual draw rods between each section for ease of assembly and to evenly distribute tension between the sections.

B. Each section shall be evenly spaced with spacing pads and high temperature sealing rope shall be used to provide a permanent gas-tight seal between the sections.

C. Flow port gaskets shall be used at each port opening to provide a permanent water-tight seal between the sections.

D. The boiler(s) shall be furnished with an insulated steel base. The base shall be painted with high temperature black paint and insulated with high temperature insulation.

Series 211A Atmospheric Gas-Fired Boilers

PO BOX 447

NEW BERLINVILLE, PA 19545-0477

SS-211A (8/03-2M)

Printed in U.S.A.

II. BOILER CONSTRUCTION FEATURES, CONT’D

E. The boiler(s) shall be furnished with a cleanout plate located on each end section for ease of inspection and cleaning of the flueways. The cleanout plates shall be sealed to the boiler with high temperature sealing rope.

F. The boiler(s) shall be provided with aluminized steel main burners of a one piece slotted port design. The burners shall be designed to provide quiet ignition and extinction.

G. The boiler(s) shall be furnished with (a) corrosion resistant aluminized steel flue collector(s) and (a) horizontal-to-ver-tical draft hood(s). The flue collector(s) shall be sealed to the top of the boiler sections with high temperature sealing rope.

H. The boiler(s) shall be provided with an insulated steel flush jacket with a painted finish. The jacket shall be designed to permit installation after the supply and return piping is connected.

III. BOILER FOUNDATION

A. A concrete housekeeping pad shall be provided as recommended by the boiler manufacturer if the boiler room floor is not level or if additional structural support is needed.

IV. INSPECTION TAPPINGS (Optional) A. All intermediate sections shall be provided with 1-1/2″ NPT inspection tappings located in front at the bottom. The tappings shall be plugged with (brass plugs) (nipples and caps).

V. TANKLESS WATER HEATERS (Optional for water boilers) A. The boiler(s) shall be provided with an internal tankless water heater rated at ___________ GPM at a 40°F to 140°F temperature rise.

B. The boiler(s) shall be provided with a low limit temperature control set to maintain a 200°F boiler water temperature.

VI. BOILER TRIM AND CONTROLS

For Water Boilers:

A. The boiler(s) shall be provided with a safety relief valve set to relieve at (30) (50) (80) PSIG. The valve shall conform to Section IV of the ASME Boiler and Pressure Vessel Code.

B. The boiler(s) shall be provided with a combination pressure-temperature gauge to indicate the boiler pressure and temperature.

C. The boiler(s) shall be provided with an operating temperature control and a manual reset high limit temperature control.

D. The boiler(s) shall be provided with a (float type) (probe type) low water cut-off.

For Steam Boilers:

A. The boiler(s) shall be provided with a safety valve set to relieve at 15 PSIG. The valve shall conform to Section IV of the ASME Boiler and Pressure Vessel Code.

B. The boiler(s) shall be provided with a compound steam gauge to indicate boiler pressure.

C. The boiler(s) shall be provided with a water gauge glass and gauge cocks.

D. The boiler(s) shall be provided with an operating pressure control and a manual reset high limit pressure control.

E. The boiler(s) shall be provided with one (1) float type and one (1) probe type low water cut-off.

VII. STANDARD GAS CONTROL TRAIN

A. The gas control train shall be factory assembled and shall include a manual shut-off gas valve, gas pressure regulator and two (2) diaphragm gas valves. A high gas pressure switch (Optional on 211A-04 thru 12) shall be furnished with each gas train. Note: 211A-11 thru 37 furnished with one (1) diaphragm gas valve and one (1) solenoid gas valve per gas train. 211A-19 thru 37 includes two (2) gas trains.

VII. STANDARD GAS CONTROL TRAIN, CONT’D

B. Inlet gas pressure to the gas train under full flow conditions shall be a minimum of (5.0″) (7.0″) (10.0″) W.C. and a maximum of 14.0″ W.C. for natural gas, and a minimum of 11.0″ W.C. and a maximum of 14.0″ W.C. for LP gas.

C. If the inlet gas pressure exceeds 14.0″ W.C., a lock-up type gas pressure regulator shall be installed in the main gas supply to the boiler(s) to provide a maximum lock-up gas pressure of 14.0″ W.C.

Contact factory for information and specifications on 211A-38 thru 46.

VIII. COMBUSTION CONTROLS FOR NATURAL GAS

211A-04 thru 10: (Natural Gas).

Standard Controls:

A. The boiler(s) shall be provided with an HSP-1 Ignition System, which shall include one (1) Honeywell S8610 electronic spark ignition module and one (1) intermittent burning electronically supervised safety pilot with 100% shut-off.

Optional controls (In lieu of standard): [Specify as required]

A. The boiler(s) shall be provided with an E1-M* Ignition System, which shall include one (1) Honeywell RM7890C Flame Safeguard Control and one (1) constant burning electronically supervised safety pilot with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panel and specify Paragraph “B” below.)

or

A. The boiler(s) shall be provided with an E1-E* Ignition System, which shall include one (1) Honeywell RM7890A Flame Safeguard Control and one (1) intermittent burning electronically supervised safety pilot with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panel and specify Paragraph “B” below.)

Specify following if prewired control panel is required:

B. Furnish a prewired MSP Electronic Control Panel, which shall be constructed of heavy gauge metal with a baked enamel finish and have a gasketed door for dust resistance. The panel shall include color-coded wiring, RM7890 Flame Safeguard with alarm contacts, Q7800A subbase, and numbered terminal strip for ease of field wiring. Also included shall be a 10 ampere fuse, switches for “Power”, “Pilot” and “Main Valve”, and signal lamps for “Power On” (Clear), “Pilot On” (Amber), “Main Valve On” (Green) and “Flame Failure” (Red).

211A-11 thru 15: (Natural Gas).

Standard controls:

A. The boiler(s) shall be provided with an HSP-1 Ignition System, which shall include one (1) Honeywell S8610 elec-tronic spark ignition module, one (1) intermittent burning electronically supervised safety pilot and one (1) constant burning thermally supervised safety pilot with 100% shut-off.

Optional controls (In lieu of standard): [Specify as required]

A. The boiler(s) shall be provided with an HSP-2 Ignition System, which shall include two (2) Honeywell S8610 electronic spark ignition modules and two (2) intermittent burning electronically supervised safety pilots with 100% shutoff.

or

A. The boiler(s) shall be provided with an E2-M* Ignition System, which shall include two (2) Honeywell RM7890C Flame Safeguard Controls and two (2) constant burning electronically supervised safety pilots with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panel and specify Paragraph “B” below.)

or

A. The boiler(s) shall be provided with an E2-E* Ignition System, which shall include two (2) Honeywell RM7890A Flame Safeguard Controls and two (2) intermittent burning electronically supervised safety pilots with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panel and specify Paragraph “B” below.)

VIII. COMBUSTION CONTROLS FOR NATURAL GAS, CONT’D

Specify following if prewired control panel is required:

B. Furnish a prewired MSP Electronic Control Panel, which shall be constructed of heavy gauge metal with a baked enamel finish and have a gasketed door for dust resistance. The panel shall include color-coded wiring, RM7890 Flame Safeguards with alarm contacts, Q7800A subbases, and numbered terminal strip for ease of field wiring. Also included shall be a 10 ampere fuse, switches for “Power”, “Pilot” and “Main Valve”, and signal lamps for “Power On” (Clear), “Pilot On” (Amber), “Main Valve On” (Green) and “Flame Failure” (Red).

211A-16 thru 25: (Natural Gas).

Standard controls:

A. The boiler(s) shall be provided with an HSP-1 Ignition System, which shall include one (1) Honeywell S8610 elec-tronic spark ignition module, one (1) intermittent burning electronically supervised safety pilot and two (2) constant burning thermally supervised safety pilots with 100% shut-off.

Optional controls (in lieu of standard): [Specify as required]

A. The boiler(s) shall be provided with an HSP-3 Ignition System, which shall include three (3) Honeywell S8610 electronic spark ignition modules and three (3) intermittent burning electronically supervised safety pilots with 100% shut-off.

or

A. The boiler(s) shall be provided with an E3-M* Ignition System, which shall include three (3) Honeywell RM7890C Flame Safeguard Controls and three (3) constant burning electronically supervised safety pilots with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panels and specify Paragraph “B” below.)

or

A. The boiler(s) shall be provided with an E3-E* Ignition System, which shall include three (3) Honeywell RM7890A Flame Safeguard Controls and three (3) intermittent burning electronically supervised safety pilots with 100% shut-off. *(Add suffix “P” for ignition system with prewired control panels and specify Paragraph “B” below.)

Specify following if prewired control panels are required:

B. Furnish two (2) prewired MSP Electronic Control Panels, which shall be constructed of heavy gauge metal with a baked enamel finish and have gasketed doors for dust resistance. The panels shall include color-coded wiring, RM7890 Flame Safeguards with alarm contacts, Q7800A subbases, and numbered terminal strips for ease of field wiring. Also included shall be a 10 ampere fuse, switches for “Power”, “Pilot” and “Main Valve”, and signal lamps for “Power On” (Clear), “Pilot On” (Amber), “Main Valve On” (Green) and “Flame Failure” (Red).

211A-26 thru 33: (Natural Gas).

Standard controls:

A. The boiler(s) shall be provided with an HSP-1 Ignition System, which shall include one (1) Honeywell S8610 elec-tronic spark ignition module, one (1) intermittent burning electronically supervised safety pilot and three (3) constant burning thermally supervised safety pilots with 100% shut-off.

Optional controls (In lieu of standard): [Specify as required]

A. The boiler(s) shall be provided with an HSP-4 Ignition System, which shall include four (4) Honeywell S8610 electronic spark ignition modules and four (4) intermittent burning electronically supervised safety pilots with 100% shut-off.

or

A. The boiler(s) shall be provided with an E4-M* Ignition System, which shall include four (4) Honeywell RM7890C Flame Safeguard Controls and four (4) constant burning electronically supervised safety pilots with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panels and specify Paragraph “B” below.)

or

A. The boiler(s) shall be provided with an E4-E* Ignition System, which shall include four (4) Honeywell RM7890A Flame Safeguard Controls and four (4) intermittent burning electronically supervised safety pilots with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panels and specify Paragraph “B” below.)

VIII. COMBUSTION CONTROLS FOR NATURAL GAS, CONT’D

Specify following if prewired control panels are required:

B. Furnish two (2) prewired MSP Electronic Control Panels, which shall be constructed of heavy gauge metal with a baked enamel finish and have gasketed doors for dust resistance. The panels shall include color-coded wiring, RM7890 Flame Safeguards with alarm contacts, Q7800A subbases, and numbered terminal strips for ease of field wiring. Also included shall be a 10 ampere fuse, switches for “Power”, “Pilot” and “Main Valve”, and signal lamps for “Power On” (Clear), “Pilot On” (Amber), “Main Valve On” (Green) and “Flame Failure” (Red).

211A-34 thru 37: (Natural Gas).

Standard controls:

A. The boiler(s) shall be provided with an HSP-1 Ignition System, which shall include one (1) Honeywell S8610 elec-tronic spark ignition module, one (1) intermittent burning electronically supervised safety pilot and four (4) constant burning thermally supervised safety pilots with 100% shut-off.

Optional controls (In lieu of standard): [Specify as required]

A. The boiler(s) shall be provided with an HSP-5 Ignition System, which shall include five (5) Honeywell S8610 electronic spark ignition modules and five (5) intermittent burning electronically supervised safety pilots with 100% shut-off.

or

A. The boiler(s) shall be provided with an E5-M* Ignition System, which shall include five (5) Honeywell RM7890C Flame Safeguard Controls and five (5) constant burning electronically supervised safety pilots with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panels and specify Paragraph “B” below.)

or

A. The boiler(s) shall be provided with an E5-E* Ignition System, which shall include five (5) Honeywell RM7890A Flame Safeguard Controls and five (5) intermittent burning electronically supervised safety pilots with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panels and specify Paragraph “B” below.)

Specify following if prewired control panels are required:

B. Furnish three (3) prewired MSP Electronic Control Panels, which shall be constructed of heavy gauge metal with a baked enamel finish and have gasketed doors for dust resistance. The panels shall include color-coded wiring, RM7890 Flame Safeguards with alarm contacts, Q7800A subbases, and numbered terminal strips for ease of field wiring. Also included shall be a 10 ampere fuse, switches for “Power”, “Pilot” and “Main Valve”, and signal lamps for “Power On” (Clear), “Pilot On” (Amber), “Main Valve On” (Green) and “Flame Failure” (Red).

Contact factory for information and specifications on 211A-38 thru 46.

IX. COMBUSTION CONTROLS FOR LP GAS

211A-04 thru 10: (LP Gas).

A. The boiler(s) shall be provided with an E1-M* Ignition System, which shall include one (1) Honeywell RM7890C Flame Safeguard Control and one (1) constant burning electronically supervised safety pilot with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panel and specify Paragraph “B” below.)

Specify following if prewired control panel is required:

B. Furnish a prewired MSP Electronic Control Panel, which shall be constructed of heavy gauge metal with a baked enamel finish and have a gasketed door for dust resistance. The panel shall include color-coded wiring, RM7890 Flame Safeguard with alarm contacts, Q7800A subbase, and numbered terminal strip for ease of field wiring. Also included shall be a 10 ampere fuse, switches for “Power”, “Pilot” and “Main Valve”, and signal lamps for “Power On” (Clear), “Pilot On” (Amber), “Main Valve On” (Green) and “Flame Failure” (Red).

IX. COMBUSTION CONTROLS FOR LP GAS, CONT’D

211A-11 thru 13: (LP Gas).

Standard controls:

A. The boiler(s) shall be provided with an E1-M* Ignition System, which shall include one (1) Honeywell RM7890C Flame Safeguard Control, one (1) constant burning electronically supervised safety pilot and one (1) constant burning thermally supervised safety pilot with 100% shut-off. *(Add suffix “P” for ignition system with prewired control panel and specify Paragraph “B” below.)

Optional controls (In lieu of standard): [Specify as required]

A. The boiler(s) shall be provided with an E2-M* Ignition System which shall include two (2) Honeywell RM7890C Flame Safeguard Controls and two (2) constant burning electronically supervised safety pilots with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panel and specify Paragraph “B” below.)

Specify following if prewired control panel is required:

B. Furnish a prewired MSP Electronic Control Panel, which shall be constructed of heavy gauge metal with a baked enamel finish and have a gasketed door for dust resistance. The panel shall include color-coded wiring, RM7890 Flame Safeguards with alarm contacts, Q7800A subbases, and numbered terminal strip for ease of field wiring. Also included shall be a 10 ampere fuse, switches for “Power”, “Control” and “Main Valve”, and signal lamps for “Power On” (Clear), “Pilot On” (Amber), “Main Valve On” (Green) and “Flame Failure” (Red).

211A-14 thru 15: (LP Gas).

A. The boiler(s) shall be provided with an E2-M* Ignition System which shall include two (2) Honeywell RM7890C Flame Safeguard Controls and two (2) constant burning electronically supervised safety pilots with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panel and specify Paragraph “B” below)

Specify following if prewired control panel is required:

B. Furnish a prewired MSP Electronic Control Panel, which shall be constructed of heavy gauge metal with a baked enamel finish and have a gasketed door for dust resistance. The panel shall include color-coded wiring, RM7890 Flame Safeguards with alarm contacts, Q7800A subbases, and numbered terminal strip for ease of field wiring. Also included shall be a 10 ampere fuse, switches for “Power”, “Pilot” and “Main Valve”, and signal lamps for “Power On” (Clear), “Pilot On” (Amber), “Main Valve On” (Green) and “Flame Failure” (Red).

211A-16 thru 25: (LP Gas).

A. The boiler(s) shall be provided with an E3-M* Ignition System which shall include three (3) Honeywell RM7890C Flame Safeguard Controls and three (3) constant burning electronically supervised safety pilots with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panel and specify Paragraph “B” below.)

Specify following if prewired control panels are required:

B. Furnish two (2) prewired MSP Electronic Control Panels, which shall be constructed of heavy gauge metal with a baked enamel finish and have a gasketed doors for dust resistance. The panels shall include color-coded wiring, RM7890 Flame Safeguards with alarm contacts, Q7800A subbases, and numbered terminal strips for ease of field wiring. Also included shall be a 10 ampere fuse, switches for “Power”, “Pilot” and “Main Valve”, and signal lamps for “Power On” (Clear), “Pilot On” (Amber), “Main Valve On” (Green) and “Flame Failure” (Red).

211A-26 thru 33: (LP Gas).

A. The boiler(s) shall be provided with an E4-M* Ignition System which shall include four (4) Honeywell RM7890C Flame Safeguard Controls and four (4) constant burning electronically supervised safety pilots with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panel and specify Paragraph “B” below.)

Specify following if prewired control panels are required:

B. Furnish two (2) prewired MSP Electronic Control Panels, which shall be constructed of heavy gauge metal with a baked enamel finish and have gasketed doors for dust resistance. The panels shall include color-coded wiring, RM7890 Flame Safeguards with alarm contacts, Q7800A subbases, and numbered terminal strips for ease of field wiring. Also included shall be a 10 ampere fuse, switches for “Power”, “Pilot” and “Main Valve”, and signal lamps for “Power On” (Clear), “Pilot On” (Amber), “Main Valve On” (Green) and “Flame Failure” (Red).

IX. COMBUSTION CONTROLS FOR LP GAS, CONT’D

211A-34 thru 37: (LP Gas).

A. The boiler(s) shall be provided with an E5-M* Ignition System which shall include five (5) Honeywell RM7890C Flame Safeguard Controls and five (5) constant burning electronically supervised safety pilots with 100% shut-off.

*(Add suffix “P” for ignition system with prewired control panel and specify Paragraph “B” below.)

Specify following if prewired control panels are required:

B. Furnish three (3) prewired MSP Electronic Control Panels, which shall be constructed of heavy gauge metal with a baked enamel finish and have gasketed doors for dust resistance. The panels shall include color-coded wiring, RM7890 Flame Safeguards with alarm contacts, Q7800A subbases, and numbered terminal strips for ease of field wiring. Also included shall be a 10 ampere fuse, switches for “Power”, “Pilot” and “Main Valve”, and signal lamps for “Power On” (Clear), “Pilot On” (Amber), “Main Valve On” (Green) and “Flame Failure” (Red).

Contact factory for information and specifications on 211A-38 thru 46.

X. OPTIONAL BOILER CONTROLS (Specify as required)

211A-04 thru 37: (Natural gas only).

A. The boiler(s) shall be provided with an MFSC Modulating Firing System to modulate boiler input at 50% or 100% according to changes in the heating load requirements. The system shall maintain a fixed (water temperature) (steam pressure) using (temperature controllers) (pressure controllers) located in the main system supply header.

211A-04 thru 37: (Natural gas only).

A. The boiler(s) shall be furnished with a Mod-U-Pak Modulating Firing System to modulate boiler input at 50%, 75%, or 100% according to changes in the heating load requirements. (Specify required control set)

1. Control set #1, for hot water boilers, provides a fixed system water temperature using temperature controllers located in the main system supply header. Boiler input will modulate at 50%, 75%, or 100% to maintain the system water temperature set point. A modulation by-pass switch shall be provided for testing purposes.

2. Control set #2, for hot water boilers, provides a variable system water temperature using an indoor-outdoor reset controller. Boiler input will modulate at 50%, 75%, or 100%, based on outside air temperature, to maintain the system reset water temperature. A modulation by-pass switch shall be provided for testing purposes.

3. Control set #3, for steam boilers, provides a fixed system steam pressure using pressure controllers located in the main system supply header. Boiler input will modulate at 50%, 75% or 100% to maintain the system pressure set point. A modulation by-pass switch shall be provided for testing purposes.

B. The boiler control system shall comply with the requirements of

Specify the name of any code(s) to be complied with (FM, IRI, CSD-1, etc.). Refer to current Trade Price List for availability of optional controls.