Lennox B Series User manual

AIR HANDLERS
B SERIES
R-410A or R-22 - Multi-Position - 50HZ/60HZ (Export Only)
Bulletin No. 490137
September 2009
ENGINEERING DATA
3.5 to 17.6 kW (1 to 5 Tons)
Optional Electric Heat - 2.5 to 25 kW
Optional Hot Water Heat -
2.6 to 36.3 kW (9,000 to 124,000 Btuh)
CABINET
Enhanced grommets - secure & tight.
Multi-position available from factory and eld
convertible.
Side return right- or left-hand capable on 12 to 30 and
36 size models.
All air handlers are basiloid packaged with bar coding
and full description on label.
Magnetic lter rack door makes for easy lter
replacement and a tight seal for less air leakage.
Fiberglass air lter comes with every air handler and
lter racks accepts readily available size lters.
Rigid beige painted cabinets constructed of heavy
gauge steel to prevent corrosion and are lined with high
quality
9.5 mm (5/8 in.) foil faced insulation to prevent
sweating.
EVAPORATOR COIL
Patented lanced n design and internally enhanced
copper tubing.
Suitable for use with R-22 and R-410A.
Dual 19 mm (3/4 in.) FPT left and right condensate
drain connections.
Drain pans are molded of corrosion proof high
temperature engineering polymer.
Coils are air pressure tested at 72 kPa (500 PSI),
pressure tested with Helium, sealed and then charged
with dry air.
Florator, non-bleed A/C or HP TXV’s available factory
installed. Screw-on TXV’s also available for eld
installation.
HOT WATER HEAT
Suitable for potable water systems.
Hot Water Heat Kits available both factory and eld
installed.
Easy to replace hot water coil. Remove one screw and
slide out.
Optional factory installed circulating pump fully encased
in cabinet.
Purge valve on hot water coil allows for manual release
of any air trapped in coil during installation or servicing.
Water connections 7/8 in. ODF (for 3/4 in. water pipe)
on 12 to 30, and 36 size models and 1-1/8 in. ODF (for
1 in. water pipe) on 31, and 37 - 60 size models.
Control board comes standard factory installed on all
Air Handlers and includes the following features:
Features are compatible with both factory and eld
installed circulating pumps.
1. Pump timer activates pump for 1 minute every 6
hours eliminating stagnant water in hot water coil.
2. 24 VAC isolation valve control-allows for zoning
control.
3. Auxiliary contacts for water heater or boiler
activation.
4. Freeze protection- standard factory installed,
activates at 4°C (40°F) and deactivates at 21°C (70°F).
5. Thermostat connections.
6. Time delay for blower activation:
• 60 seconds (tap in OFF position)
• 54°C (130°F) Aquastat (tap in ON position)
Note: Aquastat tap only included if ordered
FEATURES

50HZ BAH Air Handlers / Page 2
FEATURES
VARIABLE-SPEED MOTOR
Variable-speed control board includes dry contacts for
thermostat connections.
Constant air circulation feature runs airow at 50%
of cooling airow, improves indoor air quality and
eliminates stratication.
Control Board LED Lights display operation mode and
when dehumidication is activated.
Dehumidication - cutting dehumidication resistor on
variable-speed control board reduces cooling airow by
10%.
Choose your own cooling/heating airow settings, by
selecting taps A-D on the variable-speed control board.
Fine tune your airow setting by selecting (+) tap to
increase airow by 10% and (-) tap to decrease airow
by 12%.
Soft start feature runs airow at 82% of cooling airow
for rst 7.5 minutes of operation.
Time Delay- 1.5 minute blower off delay at the end of a
call for cooling.
ELECTRICAL FEATURES
Blower door safety switch on all models.
Dynamically balanced high efciency three-speed
motors for project exibility.
Easy to adjust blower speeds for ne tuning customer
comfort.
Electrical connections can be made on top or both
sides of cabinet.
Electric heat kits available factory installed for 2.5 & 5
kW. Higher kW heat kits available for eld installation.
Factory installed fan time delay postpones blower
shutoff 30 seconds in heating mode and 45 seconds in
cooling mode.

50HZ BAH Air Handlers / Page 3
MODEL NUMBER IDENTIFICATION
B C R M A1 2 24 S 2P 3
B= Beige Painted Cabinet VOLTAGE
(1)
1= 208/240 V, 60 Hz, 1 ph. with time delay
MOTOR TYPE 2 = 208/240 V, 60 Hz, 1 ph. w/ time delay & 130°F Aquastat
C= Three-Speed 3= 120 V, 60 Hz, 1 ph. with time delay
V= Variable-Speed*** 4= 120 V, 60 Hz, 1 ph. w/ time delay & 130°F Aquastat
5= 220 V, 50 Hz, 1 ph. with time delay (Only available in three-
Horizontal Drain Pan Position* speed blower options and 2N, 3N, & 4N Heat options)
L= Left-Hand
R= Right-Hand HEAT
O= No Cooling Coil 0= No Heat
2= 3 Kw ELEC.**
AIRFLOW CONFIGURATION 5 = 5
Kw ELEC.**
V= Vertical Only
M= Multi-position Hot Water Coil with Pump & Valve Assembly
2P = 2 Row hot water coil [sizes 12-30,36]
SLAB NUMBER 3P = 3 Row hot water coil [all sizes]
A1 Thru Z9 4P = 4 Row hot water coil [sizes 31,37-60]
00 = No Cooling Coil, Heating Only
Hot Water Coil without Pump & Valve Assembly
METERING DEVICE
2N
=
2 Row hot water coil [sizes 12
-
30,36]
METERING
DEVICE
2N
2
Row
hot
water
coil
[sizes
12 30,36]
0= No Cooling Coil 3N = 3 Row hot water coil [all sizes]
1= Piston R-410A 4N = 4 Row hot water coil [sizes 31,37-60]
2= Piston R-22
3= Bleed TXV (R-22) LINE VOLTAGE CONNECTION
4= Non-Bleed A/C TXV (R-22) S= Stripped Wire
5= Non-Bleed HP-A/C TXV (R-22) T= Terminal Block
6= Non-Bleed A/C TXV (R-410A)
9= Non-Bleed HP-A/C TXV (R-410A)
UNIT SIZE
12, 18, 24, 25, 30, 36 31, 37, 42, 48, 60
Slant Coil 'A' Coil
(side return capable)
(1)
Electric heat models not available in 120V, 60 Hz.
* Horizontal Drain Pans can be field installed as an accessory in Vertical Only Air Handlers for multi-position configuration.
** Elec. Heat Kits higher than 5 Kw only available as field installed kits.
***Variable-Speed Motor Option available only in 25-31 and 37-60 size models.
Note: Horizontal Drain Pan Position for slant coil models indicate that the opposing side of the cabinet is side air return capable.
All Air Handlers with slant coils can be field converted to allow for either left or right side air return.

50HZ BAH Air Handlers / Page 4
SPECIFICATIONS
General
Data
Size 12 18 24 25 30 31
Nominal kW (tons) 3.5 (1) 5.3 (1.5) 7.0 (2) 7.0 (2) 8.8 (2.5) 8.8 (2.5)
Connections Suction line (o.d.) - mm (in.) sweat 19 (3/4) 19 (3/4) 19 (3/4) 19 (3/4) 19 (3/4) 26 (7/8)
Liquid line (o.d.) - mm (in.) sweat 9.5 (3/8) 9.5 (3/8) 9.5 (3/8) 9.5 (3/8) 9.5 (3/8) 9.5 (3/8)
Condensate - in. fpt (2) 3/4 (2) 3/4 (2) 3/4 (2) 3/4 (2) 3/4 (2) 3/4
Circulating pump connection size - in. 7/8 7/8 7/8 7/8 7/8 7/8
Florator
Piston Size
R-22 0.041 0.053 0.059 0.059 0.067 0.067
R-410A 0.041 0.049 0.053 0.053 0.059 0.059
Three
Speed
Blower
Wheel nominal diameter x width - mm (in.) 229 x 152 (9 x 6) 254 x 203 (10 x 8)
Blower motor output - W (hp) 149 (1/5) 187 (1/4) 224 (1/3)
Nominal air volume - L/s (cfm) 190 (400) 285 (600) 380 (800) 380 (800) 470 (1000) 470 (1000)
Variable
Speed
Blower
Wheel nominal diameter x width - mm (in.) - - - - - - - - - 229 x 152
(9 x 6)
254 x 203
(10 x 8)
254 x 203
(10 x 8)
Blower motor output - W (hp) - - - - - - - - - 224 (1/3) 373 (1/2) 373 (1/2)
Cooling range - L/s (cfm) - - - - - - - - - 285 - 470
(600 - 1000)
285 - 565
(600 - 1200)
285 - 565
(600 - 1200)
Heating range L/s (cfm) - - - - - - - - - 285 - 470
(600 - 1000)
520 - 565
(1100 - 1200)
520 - 565
(1100 - 1200)
Filters Size of lter - mm (in.) 305 x 508
(12 x 20)
305 x 508
(12 x 20)
305 x 508
(12 x 20)
406 x 508
(16 x 20)
406 x 508
(16 x 20)
406 x 635
(16 x 25)
Shipping Data -1 package - kg (lbs.) less hot water coil 54 (120) 54 (120) 54 (120) 59 (130) 64 (140) 68 (150)
ELECTRICAL DATA
Available Voltage (three speed) 1120V or 208/240V, 60Hz, 1 ph or 220V, 50Hz, 1 ph
Full load amps at 120V 2.0 3.2 3.2 5.3 5.3 7.1
Full load amps at 240V 1.4 1.4 1.8 2.2 2.2 2.6
Available Voltage (variable speed) - - - - - - - - - 1120V or 208/240V, 60Hz, 1 ph
Full load amps at 120V - - - - - - - - - 4.8 5.4 5.4
Full load amps at 240V - - - - - - - - - 2.4 2.7 2.7
Transformer size and type 40VA, Class 2
Voltage (hot water circulating pump) 120V or 208/240V
Amps 0.52
1Electric heat models not available in 120 V, 60 Hz.

50HZ BAH Air Handlers / Page 5
SPECIFICATIONS
General
Data
Size 36 37 42 48 60
Nominal kW (tons) 10.5 (3) 10.5 (3) 12.3 (3.5) 14.1 (4) 17.6 (5)
Connections Suction (vapor) line (o.d.) - mm (in.) sweat 19 (3/4) 26 (7/8) 26 (7/8) 26 (7/8) 26 (7/8)
Liquid line (o.d.) - mm (in.) sweat 9.5 (3/8) 9.5 (3/8) 9.5 (3/8) 9.5 (3/8) 9.5 (3/8)
Condensate - in. fpt (2) 3/4 (2) 3/4 (2) 3/4 (2) 3/4 (2) 3/4
Circulating pump connection size - in. 7/8 7/8 7/8 7/8 7/8
Florator
Piston Size
R-22 0.073 0.073 0.080 0.084 0.093
R-410A 0.067 0.067 0.073 0.076 0.093
Three
Blower
Blower
Wheel nominal diameter x width - mm (in.) 254 x 203
(10 x 8)
254 x 254
(10 x 10)
Blower motor output - W (hp) 224 (1/3) 224 (1/3) 373 (1/2) 560 (3/4) 560 (3/4)
Nominal L/s (cfm) 565(1200) 565 (1200) 660 (1400) 755 (1600) 945 (2000)
Variable
Speed
Blower
Wheel nominal diameter x width - mm (in.) - - - 254 x 203
(10 x 8)
254 x 203
(10 x 8)
254 x 203
(10 x 8)
254 x 254
(10 x 10)
Blower motor output - W (hp) - - - 373 (1/2) 373 (1/2) 560 (3/4) 746 (1)
Cooling range - L/s (cfm) - - - 285 - 565
(600 - 1200)
470 - 710
(1000 - 1500)
660 - 850
(1400 - 1800)
800 - 895
(1700 - 1900)
Heating range L/s (cfm) - - - 520 - 565
(1100 - 1200)
565 - 710
(1200 - 1500)
755 - 850
(1600 - 1800)
800 - 895
(1700 - 1900)
Filters Size of lter - mm (in.) 406 x 508
(16 x 20)
406 x 635
(16 x 25)
406 x 635
(16 x 25)
406 x 635
(16 x 25)
457 x 635
(18 x 25)
Shipping Data -1 package - kg (lbs.) less hot water coil 64 (140) 68 (150) 95 (210) 104 (230) 109 (240)
ELECTRICAL DATA
Available Voltage (three speed) 1120V or 208/240V, 60Hz, 1 ph or 220V, 50Hz, 1 ph
Full load amps at 120V 7.1 7.1 8.5 7.5 10.5
Full load amps at 240V 2.6 2.6 3.0 4.4 4.3
Available Voltage (variable speed) - - - 120V or 208/240V, 60Hz, 1 ph
Full load amps at 120V - - - 6.0 6.0 7.2 10.2
Full load amps at 240V - - - 3.0 3.0 3.5 5.1
Transformer size and type 40VA, Class 2
Voltage (hot water circulating pump) 120V or 208/240V
Amps 0.52
1Electric heat models not available in 120 V, 60 Hz.

50HZ BAH Air Handlers / Page 6
BLOWER DATA
THREE-SPEED BLOWER PERFORMANCE
Unit
Size
Fan
Speed
Setting
Electric Heat Models Water Heat Models
Pa In.
w.g. Pa In. w.g. Pa In. w.g. Pa In. w.g. Pa In. w.g. Pa In. w.g. Pa In. w.g. Pa In. w.g. Pa In. w.g. Pa In. w.g.
25 0.10 50 0.20 75 0.30 100 0.40 125 0.50 150 0.10 175 0.20 200 0.30 225 0.40 250 0.50
12
*Low 235 499 233 493 222 470 206 437 189 401 216 458 210 445 203 431 190 402 174 368
Med 317 671 300 636 288 611 263 557 231 490 298 631 288 611 274 581 256 543 229 485
High 343 727 337 715 319 675 298 631 255 540 342 725 326 691 307 650 284 602 257 544
18
Low 235 499 233 493 222 470 206 437 189 401 216 458 210 445 203 431 190 402 174 368
*Med 317 671 300 636 288 611 263 557 231 490 298 631 288 611 274 581 256 543 229 485
High 343 727 337 715 319 675 298 631 255 540 342 725 326 691 307 650 284 602 257 544
24
Low 324 687 276 584 273 579 259 549 230 487 277 588 274 580 266 564 253 537 222 471
*Med 420 889 400 847 375 795 345 731 314 666 364 771 353 747 335 710 317 671 283 600
High 449 952 423 896 400 847 368 780 329 697 421 893 400 848 378 801 337 714 302 639
25
*Low 386 819 383 812 380 805 369 782 347 735 369 781 367 777 365 773 359 760 350 741
Med 479 1015 474 1004 465 986 453 961 439 930 467 989 467 989 464 983 456 967 445 942
High 545 1155 542 1149 529 1122 514 1090 490 1039 517 1095 514 1089 506 1072 495 1049 481 1020
30
Low 386 819 383 812 380 805 369 782 347 735 369 781 367 777 365 773 359 760 350 741
*Med 479 1015 474 1004 465 986 453 961 439 930 467 989 467 989 464 983 456 967 445 942
High 545 1155 542 1149 529 1122 514 1090 490 1039 517 1095 514 1089 506 1072 495 1049 481 1020
31
*Low 529 1121 524 1110 519 1099 503 1065 483 1023 528 1118 524 1111 518 1097 500 1060 478 1013
Med 614 1302 603 1278 582 1233 565 1197 540 1144 602 1275 595 1261 577 1222 551 1168 525 1112
High 683 1448 656 1391 641 1359 613 1298 577 1223 639 1355 628 1330 621 1317 598 1267 564 1196
36
Low 529 1121 524 1110 519 1099 503 1065 483 1023 528 1118 524 1111 518 1097 500 1060 478 1013
*Med 614 1302 603 1278 582 1233 565 1197 540 1144 602 1275 595 1261 577 1222 551 1168 525 1112
High 683 1448 656 1391 641 1359 613 1298 577 1223 639 1355 628 1330 621 1317 598 1267 564 1196
37
Low 562 1190 530 1122 496 1052 485 1028 473 1003 506 1072 477 1011 447 947 437 926 426 903
*Med 678 1437 639 1355 599 1270 586 1241 572 1212 638 1351 601 1274 563 1194 551 1167 537 1139
High 684 1449 674 1429 655 1389 634 1344 613 1298 642 1361 633 1342 616 1305 596 1263 575 1219
42
Low 635 1345 628 1331 614 1302 605 1282 593 1257 544 1153 540 1144 540 1144 536 1135 536 1135
*Med 793 1681 762 1615 749 1587 718 1521 702 1487 705 1494 682 1445 675 1431 658 1395 633 1342
High 844 1788 815 1727 790 1674 756 1603 722 1529 786 1666 750 1590 741 1571 713 1511 693 1469
48
Low 740 1568 721 1527 709 1502 676 1433 659 1397 716 1518 680 1440 665 1409 653 1383 631 1338
*Med 838 1775 814 1724 789 1672 738 1563 710 1505 780 1652 743 1575 727 1541 711 1506 689 1459
High 888 1881 865 1834 833 1765 799 1693 754 1597 819 1736 787 1668 762 1614 738 1564 719 1524
60
Low 784 1662 779 1650 775 1643 762 1614 740 1568 777 1646 775 1642 773 1639 769 1630 758 1606
*Med 874 1853 868 1840 856 1813 824 1746 790 1675 865 1833 862 1826 859 1820 833 1766 803 1702
High 984 2085 490 1038 939 1990 904 1916 868 1839 974 2065 957 2029 935 1981 905 1918 872 1847
* Factory speed setting for heating and cooling.
NOTE - All data is measured while air handler is operating with a dry DX coil and air lter installed.
Cooling speeds should not be reduced below factory setting.

50HZ BAH Air Handlers / Page 7
BLOWER DATA
VARIABLE-SPEED BLOWER PERFORMANCE & ADJUSTMENT TABLE
Unit
Size
Operating
Mode
Control Board Taps
Cooling Heating
A B C D A B C D
L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm
25
Cooling 400 850 330 700 285 600 235 500 - - - - - - - - - - - - - - - - - - - - - - - -
HP Heating - - - - - - - - - - - - - - - - - - - - - - - - 400 850 320 675 285* 600* 235* 500*
Continuous 200 425 165 350 140 300 120 250 - - - - - - - - - - - - - - - - - - - - - - - -
Aux. Heat ** ** ** ** ** ** ** ** 400 850 330 700 285* 600* 235* 500*
Emer. Heat ** ** ** ** ** ** ** ** 400 850 330 700 285* 600* 235* 500*
30,
31
Cooling 565 1200 470 1000 380 800 285 600 - - - - - - - - - - - - - - - - - - - - - - - -
HP Heating - - - - - - - - - - - - - - - - - - - - - - - - 565 1200 470 1000 380* 800* 285* 600*
Continuous 285 600 235 500 190 400 165 350 - - - - - - - - - - - - - - - - - - - - - - - -
Aux. Heat ** ** ** ** ** ** ** ** 565 1200 470 1000 380* 800* 285* 600*
Emer. Heat ** ** ** ** ** ** ** ** 565 1200 470 1000 380* 800* 285* 600*
37
Cooling 660 1400 580 1230 520 1100 470 1000 - - - - - - - - - - - - - - - - - - - - - - - -
HP Heating - - - - - - - - - - - - - - - - - - - - - - - - 660 1400 580 1230 520* 1100* 470* 1000*
Continuous 330 700 290 615 260 550 235 500 - - - - - - - - - - - - - - - - - - - - - - - -
Aux. Heat ** ** ** ** ** ** ** ** 660 1400 580 1230 520* 1100* 470* 1000*
Emer. Heat ** ** ** ** ** ** ** ** 660 1400 580 1230 520* 1100* 470* 1000*
42
Cooling 660 1400 580 1230 520 1100 470 1000 - - - - - - - - - - - - - - - - - - - - - - - -
HP Heating - - - - - - - - - - - - - - - - - - - - - - - - 660 1400 580 1230 520* 1100* 470* 1000*
Continuous 330 700 290 615 260 550 235 500 - - - - - - - - - - - - - - - - - - - - - - - -
Aux. Heat ** ** ** ** ** ** ** ** 660 1400 580 1230 520* 1100* 470* 1000*
Emer. Heat ** ** ** ** ** ** ** ** 660 1400 580 1230 520* 1100* 470* 1000*
48
Cooling 755 1600 685 1450 635 1350 590 1250 - - - - - - - - - - - - - - - - - - - - - - - -
HP Heating - - - - - - - - - - - - - - - - - - - - - - - - 755 1600 685 1450 635* 1350* 590* 1250*
Continuous 375 800 340 725 320 675 295 625 - - - - - - - - - - - - - - - - - - - - - - - -
Aux. Heat ** ** ** ** ** ** ** ** 755 1600 685 1450 635* 1350* 590* 1250*
Emer. Heat ** ** ** ** ** ** ** ** 755 1600 685 1450 635* 1350* 590* 1250*
60
Cooling 895 1900 875 1850 850 1800 800 1700 - - - - - - - - - - - - - - - - - - - - - - - -
HP Heating - - - - - - - - - - - - - - - - - - - - - - - - 895 1900 875 1850 850 1800 800 1700
Continuous 450 950 435 925 425 900 400 850 - - - - - - - - - - - - - - - - - - - - - - - -
Aux. Heat ** ** ** ** ** ** ** ** 895 1900 875 1850 850 1800 800 1700
Emer. Heat ** ** ** ** ** ** ** ** 895 1900 875 1850 850 1800 800 1700
* This air volume is not approved for use with the highest kW heater size.
**Airow is the greater of the COOL and HEAT values when both electric heat and heat pump are operating.
NOTES: The heating and cooling taps are factory set on “A” except model 37 is set on “B”
Adjust tap (+) will increase airow by 10%, while tap (-) will decrease airow by 12%.
Adjust tap “test” will cause motor to run at 70% of full airow. Use this for troubleshooting only.
At the start of a call for cooling there is a short run at 82% of airow for 7.5 minutes.
At the end of a call for cooling there is a blower off delay of 1.5 minutes.
If humidistat is used it will reduce cooling airow by 10% in high humidity.
Special Note for Units Equipped with Humidistat: If using a humidistat, the Dehumidify resistor located on the bottom right of the control board must be
removed.

50HZ BAH Air Handlers / Page 8
ELECTRICAL DATA
Air Handler
Size
(mBtuh)
Electric
Heat Capacity
Three Speed Blower Variable Speed Blower
Circuit Breaker
Amps Per Stage
Minimum
Heat
Settings
Amps
Three
Speed
Blower
Minimum
Circuit
Ampacity
Amps
Minimum
Circuit
Ampacity
kW Btuh
1240V 1240V 120V 240V 240 V 120V 240V 240 V 1 2 3
12 Water Heat 0 0 Low 2.0 1.4 1.8 - - - - - - - - - 15 - - - - - -
12 No Heat 0 0 Low 2.0 1.4 1.8 - - - - - - - - - 15 - - - - - -
12 Elec. Heat 2.5 8,530 Low - - - 1.4 14.8 - - - - - - - - - 15 - - - - - -
12 Elec. Heat 5 17,065 Low - - - 1.4 27.8 - - - - - - - - - 30 - - - - - -
18 Water Heat 0 0 Low 3.2 1.4 1.8 - - - - - - - - - 15 - - - - - -
18 No Heat 0 0 Low 3.2 1.4 1.8 - - - - - - - - - 15 - - - - - -
18 Elec. Heat 2.5 8,530 Low - - - 1.4 14.8 - - - - - - - - - 15 - - - - - -
18 Elec. Heat 5 17,065 Low - - - 1.4 27.8 - - - - - - - - - 30 - - - - - -
18 Elec. Heat 7.5 25,598 Med - - - 1.4 40.8 - - - - - - - - - 45 - - - - - -
18 Elec. Heat 10 34,130 Med - - - 1.4 53.8 - - - - - - - - - 60 - - - - - -
24 Water Heat 0 0 Low 3.2 1.8 2.3 - - - - - - - - - 15 - - - - - -
24 No Heat 0 0 Low 3.2 1.8 2.3 - - - - - - - - - 15 - - - - - -
24 Elec. Heat 2.5 8,530 Low - - - 1.8 15.3 - - - - - - - - - 30 - - - - - -
24 Elec. Heat 5 17,065 Low - - - 1.8 28.3 - - - - - - - - - 30 - - - - - -
24 Elec. Heat 7.5 25,598 Low - - - 1.8 41.3 - - - - - - - - - 45 - - - - - -
24 Elec. Heat 10 34,130 Med - - - 1.8 54.3 - - - - - - - - - 60 - - - - - -
24 Elec. Heat 12.5 42,663 Med - - - 1.8 67.4 - - - - - - - - - 45 30 - - -
25 Water Heat 0 0 Low 5.3 2.2 2.8 4.8 2.4 3.0 15 - - - - - -
25 No Heat 0 0 Low 5.3 2.2 2.8 4.8 2.4 3.0 15 - - - - - -
25 Elec. Heat 2.5 8,530 Low - - - 2.2 15.8 - - - 2.4 16.0 30 - - - - - -
25 Elec. Heat 5 17,065 Low - - - 2.2 28.8 - - - 2.4 29.0 30 - - - - - -
25 Elec. Heat 7.5 25,598 Low - - - 2.2 41.8 - - - 2.4 42.1 45 - - - - - -
25 Elec. Heat 10 34,130 Low - - - 2.2 54.8 - - - 2.4 55.1 60 - - - - - -
25 Elec. Heat 12.5 42,663 Low - - - 2.2 67.9 - - - 2.4 68.1 45 30 - - -
30 Water Heat 0 0 Low 5.3 2.2 2.8 5.4 2.7 3.4 15 - - - - - -
30 No Heat 0 0 Low 5.3 2.2 2.8 5.4 2.7 3.4 15 - - - - - -
30 Elec. Heat 2.5 8,530 Low - - - 2.2 15.8 - - - 2.7 16.4 30 - - - - - -
30 Elec. Heat 5 17,065 Low - - - 2.2 28.8 - - - 2.7 29.4 45 - - - - - -
30 Elec. Heat 7.5 25,598 Low - - - 2.2 41.8 - - - 2.7 42.4 45 - - - - - -
30 Elec. Heat 10 34,130 Low - - - 2.2 54.8 - - - 2.7 55.5 60 - - - - - -
30 Elec. Heat 12.5 42,663 Med - - - 2.2 67.9 - - - 2.7 68.5 45 30 - - -
30 Elec. Heat 15 51,195 Med - - - 2.2 80.9 - - - 2.7 81.5 60 30 - - -
30 Elec. Heat 17.5 59,728 Med - - - 2.2 93.9 - - - 2.7 94.5 60 45 - - -
31 Water Heat 0 0 Low 7.1 2.6 3.3 5.4 2.7 3.4 15 - - - - - -
31 No Heat 0 0 Low 7.1 2.6 3.3 5.4 2.7 3.4 15 - - - - - -
31 Elec. Heat 2.5 8,530 Low - - - 2.6 16.3 - - - 2.7 16.4 30 - - - - - -
31 Elec. Heat 5 17,065 Low - - - 2.6 29.3 - - - 2.7 29.4 45 - - - - - -
31 Elec. Heat 7.5 25,598 Low - - - 2.6 42.3 - - - 2.7 42.4 45 - - - - - -
31 Elec. Heat 10 34,130 Low - - - 2.6 55.3 - - - 2.7 55.5 60 - - - - - -
31 Elec. Heat 12.5 42,663 Low - - - 2.6 68.4 - - - 2.7 68.5 45 30 - - -
31 Elec. Heat 15 51,195 Low - - - 2.6 81.4 - - - 2.7 81.5 60 30 - - -
31 Elec. Heat 17.5 59,728 Low - - - 2.6 94.4 - - - 2.7 94.5 60 45 - - -
NOTE - Electric heat capacity (kW) in bold indicates that heat packages require and include circuit breakers. Optional for others.
1For 208 Volts use 0.751 correction factor for kW & Btuh.

50HZ BAH Air Handlers / Page 9
ELECTRICAL DATA
Air Handler
Size
(mBtuh)
Electric
Heat Capacity
Three Speed Blower Variable Speed Blower
Circuit Breaker
Amps Per Stage
Minimum
Heat
Settings
Amps
Three
Speed
Blower
Minimum
Circuit
Ampacity
Amps
Minimum
Circuit
Ampacity
kW Btuh
1240V 1240V 120V 240V 240 V 120V 240V 240 V 1 2 3
36 Water Heat 0 0 Low 7.1 2.6 3.3 - - - - - - - - - 15 - - - - - -
36 No Heat 0 0 Low 7.1 2.6 3.3 - - - - - - - - - 15 - - - - - -
36 Elec. Heat 2.5 8,530 Low - - - 2.6 16.3 - - - - - - - - - 30 - - - - - -
36 Elec. Heat 5 17,065 Low - - - 2.6 29.3 - - - - - - - - - 30 - - - - - -
36 Elec. Heat 7.5 25,598 Low - - - 2.6 42.3 - - - - - - - - - 45 - - - - - -
36 Elec. Heat 10 34,130 Low - - - 2.6 55.3 - - - - - - - - - 60 - - - - - -
36 Elec. Heat 12.5 42,663 Med - - - 2.6 68.4 - - - - - - - - - 45 30 - - -
36 Elec. Heat 15 51,195 Med - - - 2.6 81.4 - - - - - - - - - 60 30 - - -
36 Elec. Heat 17.5 59,728 Med - - - 2.6 94.4 - - - - - - - - - 60 45 - - -
36 Elec. Heat 20 68,260 Med - - - 2.6 107.4 - - - - - - - - - 60 60 - - -
37 Water Heat 0 0 L 7.1 2.6 3.3 6 3.0 3.8 15 - - - - - -
37 No Heat 0 0 L 7.1 2.6 3.3 6 3.0 3.8 15 - - - - - -
37 Elec. Heat 5 17,065 L - - - 2.6 29.3 - - - 3.0 29.8 45 - - - - - -
37 Elec. Heat 10 34,130 L - - - 2.6 55.3 - - - 3.0 55.8 45 30 - - -
37 Elec. Heat 12.5 42,663 M - - - 2.6 68.4 - - - 3.0 68.9 60 30 - - -
37 Elec. Heat 15 51,195 M - - - 2.6 81.4 - - - 3.0 81.9 60 30 - - -
37 Elec. Heat 20 68,260 M - - - 2.6 107.4 - - - 3.0 107.9 60 45 30
42 Water Heat 0 0 L 8.5 3.0 3.8 6 3.0 3.8 15 - - - - - -
42 No Heat 0 0 L 8.5 3.0 3.8 6 3.0 3.8 15 - - - - - -
42 Elec. Heat 5 17,065 L - - - 3.0 29.8 - - - 3.0 29.8 45 - - - - - -
42 Elec. Heat 10 34,130 L - - - 3.0 55.8 - - - 3.0 55.8 45 30 - - -
42 Elec. Heat 12.5 42,663 L - - - 3.0 68.9 - - - 3.0 68.9 45 30 - - -
42 Elec. Heat 15 51,195 M - - - 3.0 81.9 - - - 3.0 81.9 60 30 - - -
42 Elec. Heat 20 68,260 M - - - 3.0 107.9 - - - 3.0 107.9 60 45 30
48 Water Heat 0 0 L 7.5 4.4 5.5 7 3.5 4.4 15 - - - - - -
48 No Heat 0 0 L 7.5 4.4 5.5 7 3.5 4.4 15 - - - - - -
48 Elec. Heat 5 17,065 L - - - 4.4 31.5 - - - 3.5 30.4 45 - - - - - -
48 Elec. Heat 10 34,130 L - - - 4.4 57.6 - - - 3.5 56.5 60 - - - - - -
48 Elec. Heat 12.5 42,663 L - - - 4.4 70.6 - - - 3.5 69.5 45 30 - - -
48 Elec. Heat 15 51,195 L - - - 4.4 83.6 - - - 3.5 82.5 60 45 - - -
48 Elec. Heat 20 68,260 L - - - 4.4 109.7 - - - 3.5 108.5 60 45 30
48 Elec. Heat 25 85,325 M - - - 4.4 135.7 - - - 4.3 135.6 60 60 30
60 Water Heat 00 L 10.5 4.3 5.4 10.2 5.1 6.4 15 - - - - - -
60 No Heat 0 0 L 10.5 4.3 5.4 10.2 5.1 6.4 15 - - - - - -
60 Elec. Heat 5 17,065 L - - - 4.3 31.4 - - - 5.1 32.4 45 - - - - - -
60 Elec. Heat 10 34,130 L - - - 4.3 57.5 - - - 5.1 58.5 60 - - - - - -
60 Elec. Heat 12.5 42,663 L - - - 4.3 70.5 - - - 5.1 71.5 45 30 - - -
60 Elec. Heat 15 51,195 L - - - 4.3 83.5 - - - 5.1 84.5 60 30 - - -
60 Elec. Heat 20 68,260 L - - - 4.3 109.5 - - - 5.1 110.5 60 60 - - -
60 Elec. Heat 25 85,325 M - - - 4.3 135.6 - - - 4.3 135.6 60 60 30
NOTE - Electric heat capacity (kW) in bold indicates that heat packages require and include circuit breakers. Optional for others.
1For 208 Volts use 0.751 correction factor for kW & Btuh.

50HZ BAH Air Handlers / Page 10
WATER HEATING CAPACITY KW (BTUH) 12, 18 and 24
Coil
Size
No.of
rows
Entering
Water
Temp.
3.7 LPM (1 GPM) 7.4 LPM (2 GPM) 11.1 LPM (3 GPM)
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
°C °F Pa in. ft. 190 400 285 600 375 800 Pa in. ft. 190 400 285 600 375 800 Pa in. ft. 190 400 285 600 375 800
2
49 120 50 0.2 2.64 9,004 3.22 10,979 3.49 11,914 149 0.6 3.41 11,639 4.10 13,997 4.60 15,683 348 1.4 3.67 12,536 4.51 15,396 5.14 17,522
60 140 50 0.2 3.87 13,209 4.57 15,600 4.97 16,942 149 0.6 4.82 16,452 5.81 19,823 6.52 22,240 323 1.3 5.18 17,683 6.38 21,757 7.27 24,793 71 160 50 0.2 5.17 17,628 5.95 20,302 6.47 22,065 149 0.6 6.25 21,316 7.54 25,727 8.45 28,834 323 1.3 6.70 22,872 8.26 28,184 9.42 32,151
82 180 50 0.2 9.59 32,738 7.35 25,065 7.99 27,260 149 0.6 7.68 26,217 9.29 31,687 10.44 35,621 323 1.3 8.23 28,091 10.16 34,659 11.60 39,573
3
49 120 75 0.3 3.31 11,286 4.04 13,771 4.38 14,944 224 0.9 4.26 14,528 5.22 17,826 5.91 20,160 472 1.9 4.57 15,582 5.75 19,636 6.64 22,659 60 140 50 0.2 4.81 16,401 5.72 19,506 6.21 21,177 224 0.9 6.01 20,495 7.38 25,194 8.36 28,524 472 1.9 6.43 21,942 8.12 27,701 9.38 32,004 71 160 50 0.2 6.39 21,792 7.42 25,320 8.06 27,500 224 0.9 7.77 26,511 9.57 32,641 10.84 36,991 448 1.8 8.31 28,343 10.50 35,833 12.15 41,442
82 180 50 0.2 7.89 26,908 9.14 31,193 9.93 33,891 224 0.9 9.54 32,564 11.77 40,145 13.34 45,532 448 1.8 10.19 34,771 12.90 44,014 14.93 50,947
25, 30 and 36
Coil
Size
No.of
rows
Entering
Water
Temp.
7.4 LPM (2 GPM) 11.1 LPM (3 GPM) 14.8 LPM (4 GPM)
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
°C °F Pa in. ft. 378 800 472 1000 566 1200 Pa in. ft. 378 800 472 1000 566 1200 Pa in. ft. 378 800 472 1000 566 1200
2
49 120 124 0.5 5.06 17,277 5.29 18,048 5.60 19,124 249 1.0 5.74 19,588 6.01 20,523 6.45 21,997 423 1.7 6.15 20,990 6.46 22,035 6.96 23,750 60 140 124 0.5 7.19 24,529 7.51 25,619 7.96 27,164 249 1.0 8.13 27,747 8.52 29,072 9.13 31,155 423 1.7 8.70 29,682 9.13 31,163 9.85 33,616
71 160 124 0.5 9.35 31,899 9.76 33,313 10.36 35,341 249 1.0 10.55 36,013 11.06 37,734 11.86 40,464 398 1.6 11.27 38,472 11.84 40,396 12.78 43,602 82 180 99 0.4 11.53 39,359 12.04 41,098 12.78 43,622 224 0.9 13.00 44,360 13.62 46,482 14.62 49,872 398 1.6 13.87 47,332 14.57 49,705 15.73 53,678
3
49 120 174 0.7 6.25 21,309 6.68 22,783 15.88 54,179 348 1.4 7.18 24,501 7.67 26,156 8.25 28,137 597 2.4 7.52 25,648 8.26 28,187 8.96 30,578 60 140 149 0.6 8.84 30,149 9.45 32,261 10.04 34,255 323 1.3 9.96 33,970 10.84 36,982 11.67 39,809 572 2.3 10.60 36,180 11.66 39,801 12.66 43,208 71 160 149 0.6 11.46 39,095 12.27 41,866 13.03 44,472 323 1.3 12.89 43,988 14.05 47,928 15.13 51,621 547 2.2 13.72 46,799 15.10 51,526 16.40 55,970
82 180 149 0.6 14.10 48,121 15.11 51,564 16.06 54,794 323 1.3 15.85 54,077 17.28 58,963 18.62 63,537 547 2.2 16.85 57,481 18.56 63,331 20.17 68,827
31 and 37
Coil
Size
No.of
rows
Entering
Water
Temp.
11.1 LPM (3 GPM) 14.8 LPM (4 GPM) 18.5 LPM (5 GPM)
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
°C °F Pa in. ft. 472 1000 519 1100 566 1200 Pa in. ft. 472 1000 519 1100 566 1200 Pa in. ft. 472 1000 519 1100 566 1200
3
49 120 199 0.8 8.42 28,726 8.77 29,931 9.09 31,014 348 1.4 9.10 31,055 9.53 32,522 9.92 33,856 497 2 9.55 32,602 10.04 34,260 10.49 35,779 60 140 199 0.8 11.90 40,610 12.41 42,329 12.86 43,874 323 1.3 12.85 43,847 13.46 45,937 14.02 47,838 497 2 13.48 45,986 14.17 48,344 14.80 50,505
71 160 199 0.8 15.42 52,624 16.08 54,869 16.67 56,888 323 1.3 16.63 56,759 17.43 59,485 18.16 61,965 472 1.9 17.43 59,479 18.33 62,550 19.16 65,366 82 180 199 0.8 18.97 64,735 19.79 67,541 20.52 70,015 323 1.3 20.44 69,759 21.43 73,130 22.33 76,197 472 1.9 21.41 73,051 22.52 76,844 23.54 80,323
4
49 120 249 1.0 9.81 33,478 10.25 34,963 10.65 36,329 423 1.7 10.61 36,193 11.15 38,058 11.65 39,751 646 2.6 11.12 37,946 11.74 40,069 12.31 42,015 60 140 249 1.0 13.85 47,246 14.47 49,386 15.03 51,301 423 1.7 14.95 51,024 15.73 53,674 16.44 56,080 646 2.6 15.66 53,450 16.55 56,462 17.36 59,224 71 160 249 1.0 17.92 61,139 18.73 63,925 19.47 66,420 423 1.7 19.33 65,969 20.34 69,416 21.26 72,548 622 2.5 20.24 69,055 21.39 72,970 22.44 76,562
82 180 249 1.0 22.02 75,121 23.02 78,563 23.93 81,645 398 1.6 23.74 80,995 24.11 82,250 26.12 89,117 597 2.4 24.83 84,734 26.25 89,561 27.55 93,993
All capacities are based on 21°C (70°F) entering air temperature. For entering air temperatures other than 21°C (70°F) use the following capacity correction factors: 22.2°C (72°F) x 0.982, 20°C (68°F) x 1.02, 18.8°C (66°F) x 1.04. Glycol correction factors: (10% X 0.98), (20% X 0.95), (30% X 0.92), (40% X 0.88)
WATER HEATING CAPACITY

50HZ BAH Air Handlers / Page 11
42 and 48
Coil
Size
No.of
rows
Entering
Water
Temp.
11.1 LPM (3 GPM) 14.8 LPM (4 GPM) 18.5 LPM (5 GPM)
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
°C °F Pa in. ft. 661 1400 708 1500 755 1600 Pa in. ft. 661 1400 708 1500 755 1600 Pa in. ft. 661 1400 708 1500 755 1600
3
49 120 199 0.8 9.64 32,883 9.87 33,695 10.09 34,441 348 1.4 10.61 36,190 10.91 37,221 11.19 38,173 497 2.0 11.27 38,464 11.62 39,660 11.93 40,722 60 140 199 0.8 13.64 46,541 13.98 47,701 14.29 48,766 323 1.3 15.00 51,167 15.44 52,686 15.82 53,996 497 2.0 15.92 54,329 16.42 56,032 16.89 57,617 71 160 199 0.8 17.69 60,372 18.14 61,888 18.55 63,279 323 1.3 19.43 66,310 20.00 68,229 20.52 70,004 472 1.9 20.62 70,350 21.27 72,572 21.87 74,640
82 180 224 0.9 21.78 74,330 22.33 76,209 22.84 77,933 323 1.3 23.91 81,575 24.60 83,951 25.25 86,149 472 1.9 25.35 86,486 26.15 89,234 26.90 91,792
4
49 120 249 1.0 11.32 38,636 11.61 39,631 11.88 40,540 423 1.7 12.52 42,707 12.90 44,006 13.25 45,204 646 2.6 13.32 45,457 13.77 46,988 14.19 48,409 60 140 249 1.0 16.00 54,582 16.41 55,996 16.79 57,288 423 1.7 17.67 60,284 18.21 62,131 18.71 63,834 646 2.6 18.79 64,115 19.43 66,290 20.02 68,310 71 160 249 1.0 20.72 70,692 21.26 72,535 21.75 74,216 423 1.7 22.87 78,023 23.57 80,428 24.22 82,647 622 2.5 24.30 82,925 25.13 85,756 25.90 88,386 82 180 249 1.0 25.47 86,924 26.14 89,200 26.75 91,276 398 1.6 28.10 95,879 28.97 98,851 29.77 101,592 597 2.4 29.85 101,845 30.87 105,340 31.82 108,588
60
Coil
Size
No.of
rows
Entering
Water
Temp.
11.1 LPM (3 GPM) 14.8 LPM (4 GPM) 18.5 LPM (5 GPM)
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
Water
Pressure
Drop
L/s cfm L/s cfm L/s cfm
°C °F Pa in. ft. 849 1800 897 1900 944 2000 Pa in. ft. 849 1800 897 1900 944 2000 Pa in. ft. 849 1800 897 1900 944 2000
3
49 120 298 1.2 10.93 37,308 11.12 37,936 11.29 38,521 522 2.1 12.20 41,636 12.44 42,459 12.67 43,229 796 3.2 13.09 44,672 13.38 45,650 13.65 46,570 60 140 298 1.2 15.47 52,797 15.74 53,693 15.98 54,526 522 2.1 17.25 58,874 17.60 60,047 17.92 61,145 796 3.2 18.50 63,115 15.97 54,508 19.29 65,818
71 160 298 1.2 20.07 68,481 20.41 69,650 20.73 70,737 497 2.0 22.36 76,308 22.81 77,839 23.23 79,273 771 3.1 23.96 81,747 24.49 83,564 24.99 85,273 82 180 298 1.2 24.71 84,309 25.13 85,756 25.53 87,101 497 2.0 27.52 93,886 28.07 95,781 28.59 97,555 771 3.1 29.46 100,517 30.12 102,764 30.74 104,879
4
49 120 274 1.1 12.80 43,662 13.01 44,406 13.22 45,095 472 1.9 14.39 49,104 14.69 50,118 14.97 51,065 721 2.9 15.50 52,882 15.86 54,114 16.20 55,271 60 140 274 1.1 18.07 61,666 18.38 62,721 18.67 63,698 472 1.9 20.32 69,318 20.74 70,759 21.13 72,104 696 2.8 21.86 74,605 22.38 76,356 22.86 77,999 71 160 274 1.1 23.40 79,853 23.80 81,224 24.18 82,492 448 1.8 26.30 89,723 26.84 91,598 27.36 93,347 696 2.8 28.29 96,514 23.09 78,793 29.58 100,931
82 180 274 1.1 28.77 98,172 29.27 99,863 29.73 101,427 448 1.8 32.32 110,265 32.99 112,579 33.63 114,739 671 2.7 34.75 118,557 35.57 121,369 36.34 124,009
All capacities are based on 21°C (70°F) entering air temperature. For entering air temperatures other than 21°C (70°F) use the following capacity correction factors: 22.2°C (72°F) x 0.982, 20°C (68°F) x 1.02, 18.8°C (66°F) x 1.04. Glycol correction factors: (10% X 0.98), (20% X 0.95), (30% X 0.92), (40% X 0.88)
WATER HEATING CAPACITY

50HZ BAH Air Handlers / Page 12
HYDRONIC SYSTEM DESIGN
Hydronic System Design
Includes: Heating coil selection, line sizing and selected pump supplied by other
Sample Application
10.5 kW Cooling Load
82o
C Water Temp
40% Glycol Mixture
17.6 kW Heat Required
(1) From the 10.5 kW heating capacity tables select a hot water coil that supplies at least 17.6 kW at 565 L/s, 82°C water temperature
The 3 row coil supplies 20.2 kW @ 14.8 LPM, 0.5 kPa pressure drop 20.2
Correct capacity for 40% glycol (correction factors found below capacity chart) X0.88
Corrected coil heating capacity (kW) = 17.7
(2) Determine total equivalent line length
Note: Use the following line sizes as a guide for initial selection
1 - 11.1 LPM, 19 mm 4 - 18.5 LPM, 25 mm 6 - 29.6 LPM, 32 mm
Line size 25 mm Equiv. length of
Total number of fittings Quantity pipe (Table 3)
90oSR elbows 20 X0.79 m =
90oLR elbows 0 X0=0+0
45o elbows 0 X0=0+0
gate valves 2 X533 mm =1.2 m +1.1 m
Total supply and return line length +56.7 m
Total equivalent line length = 74.3 m
(3) Determine total pump head required Press. Drop/Pa
(Table 1)
Total equivalent line length 74.3 m X3.7 =2.75 1.1 m
Total pressure drop through coil (found on capacity chart) +0.67 m
Line length correction factor for 40% glycol @ 82°C (Table 2) X1.12
Total pump head required 2.0 m
(4) Now select a pump that supplies 14.8 LPM with at least 2.0 m head capability.
Note: If desired, recalculation can be done with another line size to vary pump requirement.
Table 1 Piping Pressure Loss, mm/25 mm (type K copper)
Nominal LPM
Pipe Size 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4 4.5 5 6 7 8
1/2 in. .030 .048 .065 .083 .100 .125 .150 .175 .200 - - - - - - - - -
3/4 in. .005 .009 .012 .016 .019 .024 .029 .034 .039 .045 .050 .056 .062 .077 .092 .130 - -
1 in. - - - - .005 .006 .007 .008 .009 .011 .012 .014 .015 .019 .023 .033 .042 .053
1-1/4 in. - - - - - - - - - - - - .005 .007 .008 .011 .015 .018
Table 2 Pressure Drop Correction Table 3 Equivalent ft. of pipe
% Glycol 60°C Pipe Size 90oSR el 90oLR el 45oel gate valve
10 1.04 1.04 1.02 1/2" 1.5 0.8 1 1
20 1.08 1.07 1.04 3/4" 2 1 1.4 1.4
30 1.13 1.11 1.08 1" 2.7 1.3 1.9 1.9
40 1.19 1.16 1.12 1 1/4" 3.6 1.8 2.5 2.5
50 1.24 1.21 1.17
16.4 m 16.4 m
71°C 82°C

50HZ BAH Air Handlers / Page 13
MAXIMUM LINE LENGTHS FOR HEATING COILS
Maximum Line Lengths for Heating Coils Using Furnished Pump All line lengths are total for supply and return
Air
Handler
Size
Water
Coil
Size
(rows)
Nominal
Pipe Size
(ID)
Maximum Supply Pipe Length - m (ft.) type K copper
LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM LPM GPM
mm in. 3.7 1 5 1.3 5.5 1.5 6.6 1.8 7.4 2 8.5 2 9 2.5 10 3 11 3 12 3.3 13 3.5 14 3.8 15 4 16 4.3 16.5 4.5 18 4.8 18.5 5
12, 18,
24
2
13 1/2 78 256 45 149 30 100 22 71 16 53 11 35 7 23 5 15 2 8 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
19 3/4 - - - - - - - - - - - - - - - - - - 141 464 110 361 80 263 60 198 46 152 36 118 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3
25 1/2 78 256 45 148 30 98 21 70 16 51 10 33 6 20 4 12 2 5 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
19 3/4 - - - - - - - - - - - - - - - - - - 138 454 107 351 77 251 57 186 43 140 32 105 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
30, 36
2
25 1/2 - - - - - - - - - - - - - - - - - - - - - - - - 17 55 11 37 8 25 5 16 3 10 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
19 3/4 - - - - - - - - - - - - - - - - - - - - - - - - 113 372 83 273 63 208 49 162 39 128 30 99 23 76 18 58 13 43 - - - - - - - - - - - - - - - - - - - - - - - -
25 1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 154 504 122 401 98 321 78 257 - - - - - - - - - - - - - - - - - - - - - - - -
3
13 1/2 - - - - - - - - - - - - - - - - - - - - - - - - 16 53 11 35 7 23 4 14 2 8 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
19 3/4 - - - - - - - - - - - - - - - - - - - - - - - - 110 361 80 263 57 188 46 152 36 118 27 89 20 66 15 48 10 33 - - - - - - - - - - - - - - - - - - - - - - - -
25 1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 141 461 109 359 85 280 66 217 - - - - - - - - - - - - - - - - - - - - - - - -
31, 37, 42 , 48
3
19 3/4 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 41 134 32 104 25 81 19 63 15 48 11 35 8 25 5 16 3 9
25 1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 160 526 129 422 104 341 84 277 67 221 54 177 43 141 34 111
32 1 1/4 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 576 142 467 115 378
4
19 3/4 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 38 126 30 97 23 75 17 57 13 43 9 30 6 19 3 11 1 4
25 1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 151 497 121 397 97 319 78 257 61 200 48 156 37 120 27 90
32 1 1/4 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 514 123 405 96 315
60
3
19 3/4 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 37 121 28 92 21 69 16 51 11 37 7 23 4 12 1 3 - - - - - -
25 1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 144 473 113 372 89 293 70 230 52 172 39 127 27 90 18 59
32 1 1/4 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 430 97 318 69 228
4
19 3/4 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 37 123 29 94 22 72 16 54 12 40 8 27 5 16 2 8 - - - - - -
25 1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 148 485 116 382 93 306 74 244 57 187 44 143 32 106 23 77
32 1 1/4 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 476 112 367 85 278
Notes: 1. Line lengths are based on water only. To adjust maximum line lengths for glycol, divide length by the factors shown in Table 2. 2. IMPORTANT: Glycol should never be used in a potable water system. 3. All lengths are based on closed loop systems. 4. Line lengths in bold should not be used when a water heater is the source of heat. When using a boiler for these line lengths, excessive line temperature loss will occur and must be accounted for. 5. Supply and return lines must be properly insulated to reduce temperature loss and to prevent freezing when passing through an unconditioned space. 6. All lengths include (12) 90° short radius elbows. To adjust for extra or fewer ttings, use the factors in Table 1. 7. Always use full ow ball or gate valves to minimize pressure drop.

50HZ BAH Air Handlers / Page 14
MAXIMUM LINE LENGTHS FOR HEATING COILS
TABLE 1 Equivalent length of pipe
Pipe size 90° SR el 90° LR el 45° el Gate Valve
mm in. mm ft. mm ft. mm ft. mm ft.
13 1/2 457 1.5 244 0.8 254 1 254 1
19 3/4 610 2 254 1 427 1.4 427 1.4
25 1 822 2.7 396 1.3 579 1.9 579 1.9
32 1-1/4 1097 3.6 549 1.8 762 2.5 762 2.5
TABLE 2 Fluid Temperature
% Glycol 60°C (140°F) 71°C (160°F) 82°C (180°F)
10 1.04 1.04 1.02
20 1.08 1.07 1.04
30 1.13 1.11 1.08
40 1.19 1.16 1.12
50 1.24 1.21 1.17

50HZ BAH Air Handlers / Page 15
INSTALLATION CONFIGURATIONS - 12 TO 30 AND 36 SIZES
Shading Indicates Proper Line Connections
Upflow Upflow
As shipped from factory As shipped from factory
(return in bottom or left side) (return in bottom or right side)
Suction Suction Suction
Drains Drains
Optional field
installed filter
rack
Optional field
installed filter
rack
Bottom/Filter Frame
Horizontal Right
Bottom/Filter Frame
Suction
Drains
Horizontal Left
Bottom/Filter Frame
Suction
Drains
or field converted with horizontal drain pan kit
Factory ready if ordered as multi-position
or field converted with horizontal drain pan kit
Factory ready if ordered as multi-position
Liquid
Liquid
Liquid
Liquid
Liquid

50HZ BAH Air Handlers / Page 16
INSTALLATION CONFIGURATIONS - 31, 37 AND 60 SIZES
Shading Indicates Proper Line Connections
Upflow
As shipped from factory
(return in bottom)
Suction
Drains Either set Drains
ma
y
be used
Bottom/Filter
Frame
Horizontal Right
Factory ready if ordered as multi-position
or field converted with horizontal drain pan kit
Suction
Drains
Horizontal Left
Factory ready if ordered as multi-position
or field converted with horizontal drain pan kit
Bottom/Filter
Frame
Suction
Drains
Liquid
Liquid
Liquid

50HZ BAH Air Handlers / Page 17
DIMENSIONS - MM (INCHES)
Sizes 12 - 30, 36
Water connections
Line voltage
Right, Left, and Top Side
24
V
Right hand side
Side View Front View
A
Li
q
uid
Suction Suction
Filter & rack
B C
Optional field
installed filter
rack
Optional field
installed filter
rack
Sizes 31, 37 - 60
Water connections
Line voltage
Right, Left, and Top Side
24 V
Right hand side
Side View Front View
A
Suction
Li
q
uid
Filter & rack
C
B
Unit Size A B C Supply Duct Opening Return Duct Opening
Depth X Width Depth X Width
mm in. mm in. mm in. mm in. mm in. mm in. mm in.
12, 18 & 24 1118 44 559 22 381 15 432 17 343 13-1/2 438 17-1/4 260 10-1/4
25, 30 & 36 1219 48 559 22 470 18-1/2 432 17 432 17 438 17-1/4 356 14
Unit Size A B C Supply Duct Opening Return Duct Opening
Depth X Width Depth X Width
mm in. mm in. mm in. mm in. mm in. mm in. mm in.
31, 37, 42 & 48 1244 49 660 26 508 20 533 21 470 18-1/2 559 22 400 15-3/4
60 1346.2 53 660 26 559 22 533 21 521 20-1/2 559 22 451 17-3/4

50HZ BAH Air Handlers / Page 18

NOTE - Due to Lennox’ ongoing commitment to quality, Specications, Ratings and Dimensions subject to change without notice and without incurring liability.
Improper installation, adjustment, alteration, service or maintenance can cause property damage or personal injury.
Installation and service must be performed by a qualied installer and servicing agency. ©2009 Lennox Industries, Inc.
Visit us at www.lennox.com
For the latest technical information, www.lennoxdavenet.com
Contact us at 1-800-4-LENNOX