Lennox G50UH(X) SERIES Installation and operation manual

Page 1 ©2000 Lennox Industries Inc.
Corp. 0005−L3 G50UH(X)
Service Literature Revised 09−2006
G50UH(X) series units are mid−efficiency gas furnaces
used for upflow or horizontal applications only, manufac-
tured with Lennox Duralok Plus heat exchangers formed of
aluminized steel. G50UH(X) units are available in heating
capacities of 44,000 to 154,000 Btuh and cooling applica-
tions up to 5 tons. Refer to Engineering Handbook for prop-
er sizing.
Units are factory equipped for use with natural gas. Kits are
available for conversion to LPG operation. G50UH(X) mod-
el units are equipped with the Lennox SureLight silicon ni-
tride ignition system. The G50UH(X) unit meets the Califor-
nia Nitrogen Oxides (NOx) Standards and California Sea-
sonal Efficiency requirements. All units use a redundant gas
valve to assure safety shut−off as required by C.S.A.
All specifications in this manual are subject to change. Pro-
cedures outlined in this manual are presented as a recom-
mendation only and do not supersede or replace local or
state codes. In the absence of local or state codes, the
guidelines and procedures outlined in this manual (except
where noted) are recommended only and do not constitute
code.
TABLE OF CONTENTS
Specifications Page 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Data Page 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Altitude Page 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Identification Page 16. . . . . . . . . . . . . . . . . . . . . . . .
I Unit Components Page 18. . . . . . . . . . . . . . . . . . . . . . .
II Installation Page 27. . . . . . . . . . . . . . . . . . . . . . . . . . . .
III Start Up Page 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IV Heating System Service Checks Page 27. . . . . . . . .
V Typical Operating Characteristics Page 29. . . . . . . . .
VI Maintenance Page 30. . . . . . . . . . . . . . . . . . . . . . . . . .
VII Wiring and Sequence of Operation Page 32. . . . . .
VIII SureLight Troubleshooting Guide Page 38. . . . . . .
IMPORTANT
Improper installation, adjustment, alteration, ser-
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and service
must be performed by a qualified installer, service
agency or the gas supplier.
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at discon-
nect switch(es). Unit may have multiple
power supplies.
WARNING
Sharp edges.
Be careful when servicing unit to avoid sharp edges
which may result in personal injury.

Page 2
SPECIFICATIONS
Gas
Heating
ModelNo. G50UH−24A−045 G50UH−24A−070 G50UH−36A−070 G50UH−48B−070
Heating
Performance Low NOx Model No. G50UH−24A−045X − − − − G50UH−36A−070X − − − −
Input− Btuh (kW) 44,000 (12.9) 66,000 (19.3) 66,000 (19.3) 66,000 (19.3)
Output− Btuh (kW) 36,000 (10.5) 54,100 (15.8) 54,100 (15.8) 54,000 (15.8)
AFUE 80.0% 80.0% 80.0% 80.0%
California Seasonal Efficiency 74.2% 74.8% 74.8% 72.9%
Highstatic(AGA/CGA)− in.w.g. (Pa) .50 (124) .50 (124) .50 (124) .50 (124)
Flue connection − in. (mm) round 4 (102) 4 (102) 4 (102) 4 (102)
GaspipesizeIPS− in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7)
Temperature rise range − F (C) 35 − 65 (19 − 36) 40 − 70 (22 − 39) 40 − 70 (22 − 39) 25 − 55 (15 − 33)
Indoor
Blower
Wheelnominaldiameter xwidth −in. (mm) 10 x 7 (254 x 178) 10 x 7 (254 x 178) 10 x 8 (254 x 203) 10 x 10 (254 x 254)
Blower
Motoroutput − hp (W) 1/5 (149) 1/5 (149) 1/3 (249) 1/2 (373)
Tons(kW) ofadd-oncooling 2 (7.0) 2 (7.0) 2 − 3 (7.0 − 10.6) 2 − 4 (7.0 − 14.1)
Shippingweight − 1 package 121 lbs. (55 kg) 127 lbs. (58 kg) 132 lbs. (60 kg) 139 lbs. (63 kg)
Matching Coils
Up−flow cased C33−18A−2F, C33−24A−2F, C33−30A−2F, C33−36A−2F,
C33−38A−2F
C33−24B−2F, C33−30B−2F,
C33−36B−2F, C33−38B−2F,
C33−42B−2F, C33−48B−2F
Horizontal CH33−18A−2F, CH33−24/30A−2F, CH33−36A−2F
CH33−36B−2F,
CH33−42B−2F,
CH33−44/48B−2F
Electricalcharacteristics 120 volts − 60 hertz − 1 phase (less than 12 amps)
OPTIONAL ACCESSORIES - MUST BE ORDERED EXTRA
Air Filter and Rack Kit
Number and size of filters Horizontal (end) 87L95 − (1) 14 x 25 x 1 in. (356 x 635 x 25 mm)
87L96 − (1) 18 x 25 x 1
in.
(457 x 635 x 25 mm)
Side Return Single (44J22) or Ten Pack (66K63) − (1) 16 x 25 x 1 in. (406 x 635 x 25 mm)
EZ Filter
Base
Catalog Number − Shipping Weight 73P55 − 6 lbs. (3 kg) 73P56 − 7 lbs. (3 kg)
Base
Dimensions − H x W x D 4 x 14−1/4 x 28−5/8 in. (102 x 362 x 727 mm) 4 x 17−5/8 x 28−5/8 in.
(102 x 448 x 727 mm)
Number and size of filter (field provided) 14 x 25 x 1 in. (356 x 635 x 25 mm) 16 x 25 x 1 in.
(406 x 635 x 25 mm)
Horizontal Support Frame Kit − Ship. Weight − lbs. (kg) 56J18 − 18 (8) 56J18 − 18 (8) 56J18 − 18 (8) 56J18 − 18 (8)
LPG/Propane Kit See High Altitude Table Page 15
Twinning Kit 15L38 15L38 15L38 15L38
Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized furnaces.
NOTE − Filters and provisions for mounting are not furnished and must be field provided.
The same C33 uncased models match the furnaces shown but require an optional adaptor base or field fabricated transition. See C33 coil bulletin for additional informa-
tion.
Cleanable polyurethane frame type filter.
Canada Only.

Page 3
SPECIFICATIONS
Gas
Heating
ModelNo. G50UH−36B−090 G50UH−48B−090 G50UH−36C−110 G50UH−48C−110
Heating
Performance Low NOx Model No. − − − − G50UH−48B−090X − − − − − − − −
Input− Btuh (kW) 88,000 (25.8) 88,000 (25.8) 110,000 (32.2) 110,000 (32.2)
Output− Btuh (kW) 72,100 (21.1) 72,100 (21.1) 90,200 (26.4) 88,500 (25.9)
AFUE 80.0% 80.0% 80.0% 80.0%
California Seasonal Efficiency 75.7% 75.3% 75.7% 75.0%
Highstatic(AGA/CGA)− in.w.g. (Pa) .50 (124) .50 (124) .50 (124) .50 (124)
Flue connection − in. (mm) round 4 (102) 4 (102) 4 (102) 4 (102)
GaspipesizeIPS− in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7)
Temperature rise range − F (C) 40 − 70 (22 − 39) 40 − 70 (22 − 39) 50 − 80 (28 − 44) 40 − 70 (22 − 39)
Indoor
Blower
Wheelnominaldiameter xwidth −in.
(mm) 10 x 8 (254 x 203) 10 x 10 (254 x 254) 10 x 8 (254 x 203) 10 x 10 (254 x 254)
Blower Motoroutput − hp (W) 1/3 (249) 1/2 (373) 1/3 (249) 1/2 (373)
Tons(kW) ofadd-oncooling 2 − 3 (7.0 − 10.6) 2 − 4 (7.0 − 14.1) 2 − 3 (7.0 − 10.6) 2 − 4 (7.0 − 14.1)
Shippingweight − 1 package 146 lbs. (66 kg) 153 lbs (69 kg) 166 lbs. (75 kg) 169 lbs. (77 kg)
Matching Coils Up−flow cased C33−24B−2F, C33−30B−2F, C33−36B−2F,
C33−38B−2F, C33−42B−2F, C33−48B−2F C33−36C−2F, C33−48C−2F, C33−50/60C−2F,
Horizontal CH33−36B−2F, CH33−42B−2F,
CH33−44/48B−2F CH33−36C−2F, CH33−48C−2F,
CH33−50/60C−2F
Electricalcharacteristics 120 volts − 60 hertz − 1 phase (less than 12 amps)
OPTIONAL ACCESSORIES - MUST BE ORDERED EXTRA
Air Filter & Rack
Kit Horizontal (end) 87L96 − (1) 18 x 25 x 1 in. (457 x 635 x 25 mm) 87L97 − (1) 20 x 25 x 1 in. (508 x 635 x 25 mm)
Kit
Number & size of fil-
ters Side Return Single 44J22 or Ten Pack (66K63) − (1) 16 x 25 x 1 in. (406 x 635 x 25 mm)
EZ Filter
Base
Catalog Number − Shipping Weight 73P56 − 7 lbs. (3 kg) 73P57 − 8 lbs. (4 kg)
Base Dimensions − H x W x D 4 x 17−5/8 x 28−5/8 in. (102 x 448 x 727 mm) 4 x 21−5/8 x 28−5/8 in. (102 x 549 x 727 mm)
Number and size of field provided
filter 16 x 25 x 1 in. (406 x 635 x 25 mm) 20 x 25 x 1 in. (508 x 635 x25 mm)
Horizontal Support Frame Kit − Ship. Weight − lbs.
(kg) 56J18 − 18 (8) 56J18 − 18 (8) 56J18 − 18 (8) 56J18 − 18 (8)
LPG/Propane Kit See High Altitude Table Page 15
Twinning Kit 15L38 15L38 15L38 15L38
Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized furnaces.
NOTE − Filters and provisions for mounting are not furnished and must be field provided.
The same C33 uncased models match the furnaces shown but require an optional adaptor base or field fabricated transition. See C33 coil bulletin for additional information.
Cleanable polyurethane frame type filter.
Canada Only.

Page 4
SPECIFICATIONS
ModelNo. G50UH−60C−110 G50UH−48C−135 G50UH−60D−135 G50UH−60D−155
Gas
Heating
Input− Btuh (kW) 110,000 (32.2) 132,000 (38.7) 132,000 (38.7) 154,000 (45.1)
Heating
Performance Output− Btuh (kW) 90,200 (26.4) 106,900 (31.3) 106,900 (31.3) 124,700 (36.5)
AFUE 80.0% 80.0% 80.0% 80.0%
California Seasonal Efficiency 75.7% 76.0% 75.0% 75.6%
Highstatic(AGA/CGA)− in.w.g. (Pa) .50 (124) .50 (124) .50 (124) .50 (124)
Flue connection − in. (mm) round 4 (102) 4 (102) 4 (102) 4 (102)
GaspipesizeIPS− in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7)
Temperature rise range − F (C) 35 − 65 (19 − 36) 50 − 80 (28 − 44) 45 − 75 (25 − 42) 50 − 80 (28 − 44)
Indoor
Blower
Wheelnominaldiameter xwidth −in.
(mm) 11−1/2 x 10 (292 x 254) 10 x 10 (254 x 254) 11−1/2 x 10 (292 x 254) 11−1/2 x 10 (292 x 254)
Motoroutput − hp (W) 3/4 (560) 1/2 (373) 3/4 (560) 3/4 (560)
Tons(kW) ofadd-oncooling 5 − 5+ (17.6 − 17.6+) 2 − 4 (7.0 − 14.1) 5 − 5+ (17.6 − 17.6+) 5 − 5+ (17.6 − 17.6+)
Shippingweight − 1 package 172 lbs. (78 kg) 178 lbs. (81 kg) 192 lbs. (87 kg) 201 lbs. (91 kg)
Matching Coils Up−flow cased C33−36C−2F, C33−48C−2F, C33−50/60C−2F, C33−60D−2F, C33−62D−2F
Horizontal CH33−36C−2F, CH33−48C−2F,
CH33−50/60C−2F CH33−60D−2F, CH33−62D−2F
Electricalcharacteristics 120 volts − 60 hertz − 1 phase (less than 12 amps)
OPTIONAL ACCESSORIES - MUST BE ORDERED EXTRA
Air Filter and Rack
Kit Horizontal (end) 87L97 (1) 20 x 25 x 1 in. (508 x 635 x 25 mm) 87L98 (1) 25 x 25 x 1 in. (635 x 635 x 25 mm)
Kit
Number & size of fil-
ters Side Return Single 44J22 or Ten Pack (66K63) − (1) 16 x 25 x 1 (406 x 635 x 25)
EZ Filter
Base
Catalog Number − Shipping Weight 73P57 − 8 lbs. (4 kg) 73P58 − 10 lbs. (5 kg)
Base
Dimensions − H x W x D 4 x 21−5/8 x 28−5/8 in. (102 x 549 x 727 mm) 4 x 24−5/8 x 28−5/8 in. (102 x 625 x 727 mm)
Number and size of field provided fil-
ter 20 x 25 x 1 in. (508 x 635 x25 mm) 24 x 24 x 1 in. (610 x 610 x 25 mm)
 High Altitude Orifice Kit − Natural Gas Only 47M82 47M82 47M82 47M82
High Altitude
Pressure Switch Kit
4501−7500 ft. (1372−2286 m) 49L90 49L90 49L90 49L90
Pressure Switch Kit
7501−10,000 ft. (2286−3048m) 15M22 15M22 15M22 15M22
Horizontal Support Frame Kit − Ship. Weight − lbs. (kg) 56J18 − 18 (8) 56J18 − 18 (8) 56J18 − 18 (8) 56J18 − 18 (8)
RAB Return Air Base RAB60C (12M71)− − − − RAB60D (12M72)RAB60D (12M72)
LPG/Propane Kit See High Altitude Table Page 15
Twinning Kit 15L38 15L38 15L38 15L38
Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized furnaces.
NOTE − Filters and provisions for mounting are not furnished and must be field provided.
The same C33 uncased models match the furnaces shown but require an optional adaptor base or field fabricated transition. See C33 coil bulletin for additional information.
Required for proper operation at altitudes over 4500 ft. (1370 m).
Cleanable polyurethane frame type filter.
Flue connection on the unit is 4 in. (102 mm) diameter. Most applications will require 5 in. (127 mm) venting and field supplied 4 x 5 in. (102 x 127 mm) adaptor. See Venting
Tables in the Installation Instructions for detailed information.
Not for use with RAB Return Air Base or with 60C and 60D size units with air flow requirements of 1800 cfm (850 L/s) or greater. See Blower Performance Tables
for additional information.
Required for proper operation at altitudes from 7501 to 10,000 ft. (2286 to 3048 m).

Page 5
SPECIFICATIONS
Gas
Heating
ModelNo. G50UH−60C−110−4 G50UH−60D−135−4 G50UH−60D−155−4
Heating
Performance Input− Btuh (kW) 110,000 (32.2) 132,000 (38.7) 154,000 (45.1)
Output− Btuh (kW) 89,400 (26.2) 106,900 (31.3) 124,700 (36.5)
AFUE 80.0% 80.0% 80.0%
California Seasonal Efficiency 73.9% 75.0% 75.6%
Highstatic(AGA/CGA)− in.w.g. (Pa) .50 (124) .50 (124) .50 (124)
Flue connection − in. (mm) round 4 (102) 4 (102) 4 (102)
GaspipesizeIPS− in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7)
Temperature rise range − F (C) 30 − 60 (18 − 36) 45 − 75 (25 − 42) 50 − 80 (28 − 44)
Indoor
Blower
Wheelnominaldiameter xwidth −in. (mm) 11−1/2 x 10 (292 x 254) 11−1/2 x 10 (292 x 254) 11−1/2 x 10 (292 x 254)
Blower Motoroutput − hp (W) 1 (746) 1 (746) 1 (746)
Tons(kW) ofadd-oncooling 5 (17.6) 5 (17.6) 5 (17.6)
Shippingweight − 1 package 175 lbs. (79 kg) 195 lbs. (88 kg) 204 lbs. (93 kg)
Matching Coils Up−flow cased C33−36C−2F,
C33−48C−2F,
C33−50/60C−2F, C33−60D−2F, C33−62D−2F
Horizontal CH33−36C−2F,
CH33−48C−2F,
CH33−50/60C−2F CH33−60D−2F, CH33−62D−2F
Electricalcharacteristics 120 volts − 60 hertz − 1 phase (less than 12 amps)
OPTIONAL ACCESSORIES - MUST BE ORDERED EXTRA
Air Filter and Rack Kit
Number & size of filters Horizontal (end) 87L97 (1) 20 x 25 x 1
in. (508 x 635 x 25 mm) 87L98 (1) 25 x 25 x 1 in. (635 x 635 x 25 mm)
Side Return Single 44J22 or Ten Pack (66K63) − (1) 16 x 25 x 1 (406 x 635 x
25)
EZ Filter
Base
Catalog Number − Shipping Weight 73P57 − 8 lbs. (4 kg) 73P58 − 10 lbs. (5 kg)
Base
Dimensions − H x W x D 4 x 21−5/8 x 28−5/8 in.
(102 x 549 x 727 mm) 4 x 24−5/8 x 28−5/8 in. (102 x 625 x 727 mm)
Number and size of field provided filter 20 x 25 x 1 in. (508 x
635 x25 mm) 24 x 24 x 1 in. (610 x 610 x 25 mm)
Horizontal Support Frame Kit − Ship. Weight − lbs. (kg) 56J18 − 18 (8) 56J18 − 18 (8) 56J18 − 18 (8)
RAB Return Air Base RAB60C (12M71)RAB60D (12M72)RAB60D (12M72)
LPG/Propane Kit See High Altitude Table Page 15
Twinning Kit 15L38 15L38 15L38
Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized furnaces.
NOTE − Filters and provisions for mounting are not furnished and must be field provided.
The same C33 uncased models match the furnaces shown but require an optional adaptor base or field fabricated transition. See C33 coil bulletin for additional information.
Cleanable polyurethane frame type filter.
Flue connection on the unit is 4 in. (102 mm) diameter. Most applications will require 5 in. (127 mm) venting and field supplied 4 x 5 in. (102 x 127 mm) adaptor. See Venting
Tables in the Installation Instructions for detailed information.
Not for use with RAB Return Air Base or with 60C and 60D size units with air flow requirements of 1800 cfm (850 L/s) or greater. See Blower Performance Tables
for additional information.

Page 6
BLOWER DATA
G50UH−24A−045 PERFORMANCE
External Static Air Volume / Watts at Various Blower Speeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
0.00 0 1090 515 460 905 425 390 725 340 300
0.05 12 1080 510 450 900 425 390 720 340 300
0.10 25 1065 505 445 895 420 385 710 335 295
0.15 37 1050 495 435 895 420 380 700 330 290
0.20 50 1030 485 425 890 420 375 690 325 290
0.25 62 1015 480 415 875 415 370 680 320 285
0.30 75 995 470 410 860 405 365 665 315 280
0.40 100 960 455 395 840 395 350 650 305 270
0.50 125 910 430 380 795 375 335 610 290 260
0.60 150 840 395 355 750 355 315 540 255 245
0.70 175 770 365 340 665 315 295 490 230 235
0.80 200 660 310 315 555 260 275 420 200 225
0.90 225 560 265 295 480 225 260 355 170 210
NOTE − All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished − field provided) in place. Also see Filter Air Resistance table.
G50UH−24A−070 PERFORMANCE
External Static Air Volume / Watts at Various Blower Speeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
0.00 0 1075 505 445 905 425 375 730 345 290
0.05 12 1070 505 445 900 425 375 725 340 290
0.10 25 1065 505 440 895 420 370 720 340 285
0.15 37 1060 500 435 890 420 365 715 335 285
0.20 50 1055 500 430 885 420 360 710 335 280
0.25 62 1045 495 425 880 415 360 700 330 280
0.30 75 1030 485 415 875 415 355 690 325 270
0.40 100 1010 475 400 860 405 350 675 320 270
0.50 125 975 460 390 840 395 340 660 310 265
0.60 150 940 445 375 805 380 325 640 300 255
0.70 175 890 420 360 755 355 305 605 285 240
0.80 200 830 390 340 700 330 285 565 265 225
0.90 225 765 360 305 640 300 265 515 245 205
NOTE − All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished − field provided) in place. Also see Filter Air Resistance table.

Page 7
BLOWER DATA
G50UH−36A−070 PERFORMANCE
External Static Air Volume / Watts at Various Blower Speeds
External
Static
Pressure High Medium−High Medium−Low Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts
0.00 0 1500 710 705 1290 610 565 985 465 455 830 390 375
0.05 12 1475 695 695 1275 600 555 980 465 445 820 385 365
0.10 25 1450 685 680 1255 590 545 970 460 440 810 380 360
0.15 37 1425 675 670 1240 585 535 965 455 430 805 380 355
0.20 50 1400 660 655 1225 580 525 955 450 425 795 375 350
0.25 62 1370 645 645 1205 570 510 945 445 415 790 375 345
0.30 75 1340 630 630 1180 555 500 930 440 405 780 370 335
0.40 100 1285 605 610 1140 540 475 900 425 390 745 350 325
0.50 125 1215 575 580 1080 510 450 865 410 375 705 335 310
0.60 150 1150 545 560 1015 480 430 810 380 355 655 310 290
0.70 175 1060 500 535 940 445 405 730 345 330 585 275 270
0.80 200 955 450 515 800 375 370 655 310 305 480 225 260
0.90 225 785 370 475 605 285 325 585 275 270 410 195 255
NOTE − All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished − field provided) in place. Also see Filter Air Resistance table.
G50UH−36B−090 PERFORMANCE
External Static Air Volume / Watts at Various Blower Speeds
External
Static
Pressure High Medium−High Medium−Low Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts
0.00 0 1500 710 720 1255 590 595 1040 490 460 900 425 370
0.05 12 1485 700 705 1250 590 580 1040 490 450 895 420 365
0.10 25 1465 690 685 1240 585 570 1035 490 445 890 420 360
0.15 37 1450 685 675 1235 585 555 1035 490 440 885 420 355
0.20 50 1435 675 660 1225 580 545 1030 485 435 880 415 350
0.25 62 1420 670 645 1215 575 530 1025 485 425 875 415 345
0.30 75 1400 660 630 1200 565 520 1020 480 415 870 410 340
0.40 100 1345 635 595 1170 550 495 1000 470 400 855 405 330
0.50 125 1300 615 575 1135 535 475 965 455 380 830 390 300
0.60 150 1235 585 545 1080 510 445 930 440 360 780 370 290
0.70 175 1165 550 510 1020 480 415 870 410 340 740 350 280
0.80 200 1080 510 480 940 445 385 800 380 315 670 315 260
0.90 225 985 465 445 840 395 355 710 335 290 600 285 245
NOTE − All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished − field provided) in place. Also see Filter Air Resistance table.

Page 8
BLOWER DATA
G50UH−36C−110 PERFORMANCE
External Static Air Volume / Watts at Various Blower Speeds
External
Static
Pressure High Medium−High Medium−Low Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts
0.00 0 1555 735 715 1335 630 575 1085 510 460 925 435 365
0.05 12 1540 725 705 1330 630 555 1080 510 450 920 435 360
0.10 25 1525 720 690 1320 625 545 1075 505 440 915 430 355
0.15 37 1510 715 680 1310 620 535 1070 505 430 910 430 350
0.20 50 1490 705 670 1295 610 525 1065 505 420 900 425 340
0.25 62 1465 690 655 1280 605 510 1060 500 415 890 420 335
0.30 75 1440 680 645 1260 595 495 1050 495 405 880 415 330
0.40 100 1385 655 615 1230 580 485 1030 485 390 865 410 320
0.50 125 1320 625 590 1190 560 460 995 470 375 835 395 300
0.60 150 1260 595 570 1135 535 430 960 455 355 815 385 295
0.70 175 1190 560 545 1075 505 410 915 430 345 775 365 285
0.80 200 1090 515 515 970 460 385 860 405 325 760 360 280
0.90 225 975 460 485 880 415 360 790 375 305 705 335 275
NOTE − All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished − field provided) in place. Also see Filter Air Resistance table.
G50UH−48B−070 PERFORMANCE
External Static Air Volume / Watts at Different Blower Speeds
External
Static
Pressure High Medium−High Medium−Low Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 2080 980 846 1810 855 764 1535 725 634 1295 610 519
.10 25 2030 955 810 1790 845 714 1520 715 600 1285 605 492
.20 50 1955 920 767 1760 830 675 1515 715 566 1275 600 477
.30 75 1885 890 732 1710 805 640 1505 710 555 1265 595 459
.40 100 1820 860 699 1670 790 611 1470 695 525 1255 590 443
.50 125 1740 820 664 1600 755 575 1420 670 496 1215 575 414
.60 150 1635 770 624 1530 720 544 1350 635 464 1175 555 400
.70 175 1545 730 597 1420 670 501 1270 600 432 1080 510 368
.80 200 1400 660 554 1295 610 462 1135 535 392 990 465 343
.90 225 1250 590 512 1125 530 419 1050 495 372 875 410 310
NOTES − All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished − field provided) in place. Also see Filter Air Resistance table.
Air volume based on bottom air return air. Actual air volume may vary on side return air applications.
G50UH−48B−090 PERFORMANCE
External Static Air Volume / Watts at Various Blower Speeds
External
Static
Pressure High Medium−High Medium−Low Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts
0.00 0 1970 930 790 1810 855 735 1585 750 670 1340 630 565
0.05 12 1940 915 780 1785 840 715 1580 745 650 1335 630 555
0.10 25 1915 905 765 1760 830 695 1570 740 630 1325 625 540
0.15 37 1880 885 745 1730 815 660 1560 735 615 1325 625 530
0.20 50 1840 870 730 1700 800 620 1545 730 600 1320 625 520
0.25 62 1805 850 715 1670 790 625 1520 715 585 1310 620 510
0.30 75 1765 835 695 1640 775 625 1490 705 565 1295 610 500
0.40 100 1695 800 670 1570 740 595 1440 680 540 1260 595 480
0.50 125 1600 755 635 1490 705 560 1360 640 505 1195 565 450
0.60 150 1505 710 600 1400 660 530 1285 605 480 1140 540 425
0.70 175 1395 660 565 1265 595 485 1170 550 440 990 465 380
0.80 200 1250 590 520 1100 520 445 975 460 390 905 425 355
0.90 225 1005 475 460 870 410 385 900 425 365 810 380 325
NOTE − All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished − field provided) in place. Also see Filter Air Resistance table.

Page 9
BLOWER DATA
G50UH−48C−110 PERFORMANCE
External Static Air Volume / Watts at Various Blower Speeds
External
Static
Pressure High Medium−High Medium−Low Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts
0.00 0 2015 950 895 1620 765 780 1340 630 640 1150 545 525
0.05 12 1990 940 870 1615 760 760 1340 630 640 1150 545 525
0.10 25 1965 925 850 1610 760 745 1340 630 640 1150 545 525
0.15 37 1930 910 825 1605 755 725 1335 630 630 1150 545 525
0.20 50 1895 895 805 1600 755 710 1335 630 615 1150 545 525
0.25 62 1860 880 785 1590 750 695 1330 630 605 1150 545 520
0.30 75 1820 860 765 1580 745 675 1330 630 590 1145 540 515
0.40 100 1740 820 725 1530 720 635 1320 625 560 1140 540 490
0.50 125 1665 785 695 1475 695 600 1285 605 525 1120 530 470
0.60 150 1575 745 650 1405 665 555 1230 580 490 1075 505 445
0.70 175 1475 695 610 1310 620 515 1165 550 470 1015 480 415
0.80 200 1350 635 560 1210 570 485 1080 510 430 930 440 380
0.90 225 1210 570 520 1070 505 430 870 410 365 740 350 325
NOTE − All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished − field provided) in place. Also see Filter Air Resistance table.
G50UH−48C−135 PERFORMANCE
External Static Air Volume / Watts at Various Blower Speeds
External
Static
Pressure High Medium−High Medium−Low Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts
0.00 0 2075 980 820 1800 850 710 1425 675 570 1115 525 435
0.05 12 2035 960 805 1785 840 695 1425 670 560 1120 530 435
0.10 25 1990 940 790 1765 835 675 1420 670 545 1125 530 430
0.15 37 1950 920 765 1740 820 660 1410 665 535 1125 530 425
0.20 50 1905 900 745 1715 810 645 1405 665 525 1120 530 420
0.25 62 1865 880 730 1680 795 625 1390 655 515 1115 525 410
0.30 75 1825 860 715 1650 780 610 1375 650 505 1105 520 405
0.40 100 1740 820 680 1585 745 580 1355 640 485 1090 515 390
0.50 125 1640 775 645 1495 705 545 1300 615 455 1050 495 370
0.60 150 1540 730 615 1420 670 515 1225 580 430 1000 470 355
0.70 175 1420 670 575 1310 615 475 1140 535 400 935 440 330
0.80 200 1260 595 520 1155 545 425 1025 485 365 865 410 315
0.90 225 1125 530 495 1010 475 385 880 415 330 750 355 285
NOTE − All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished − field provided) in place. Also see Filter Air Resistance table.

Page 10
BLOWER DATA
G50UH−60C−110−1, −2, −3 PERFORMANCE − Bottom Return Air, Side Return Air with Optional RAB Return Air Base, Return
Air from Both Sides or Return Air from Bottom and One Side.
External Static Air Volume / Watts at Various Blower Speeds
External
Static
Pressure High Medium−High Medium−Low Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts
0.00 0 2450 1155 1220 2300 1085 1060 2056 970 905 1725 815 735
0.05 12 2410 1135 1205 2265 1070 1045 2040 965 895 1715 810 725
0.10 25 2370 1120 1195 2230 1050 1030 2020 955 890 1710 810 720
0.15 37 2325 1095 1175 2200 1040 1015 1995 940 875 1700 800 715
0.20 50 2280 1075 1165 2170 1025 1005 1975 935 870 1695 800 710
0.25 62 2245 1060 1150 2130 1005 990 1950 920 855 1680 795 705
0.30 75 2205 1040 1135 2095 990 975 1925 910 845 1665 785 700
0.40 100 2115 995 1105 2010 950 940 1860 875 820 1625 770 685
0.50 125 2025 955 1060 1945 920 920 1810 855 805 1605 755 675
0.60 150 1910 900 1015 1850 875 885 1715 810 780 1540 730 670
0.70 175 1835 865 1005 1775 840 865 1655 780 765 1495 705 655
0.80 200 1745 825 975 1655 780 835 1540 725 730 1400 660 635
0.90 225 1610 760 945 1540 725 805 1475 695 715 1310 620 615
NOTE − All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished − field provided) in place. Also see Filter Air Resistance table.
G50UH−60C−110−1, −2, −3 PERFORMANCE − Single Side Return Air − Air volumes in bold require field fabricated transition
to accommodate 20 x 25 x 1 in. (508 x 635 x25 mm) cleanable air filter in order to maintain proper air velocity.
External Static Air Volume / Watts at Various Blower Speeds
External
Static
Pressure High Medium−High Medium−Low Low
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts cfm L/s Watts
0.00 0 2395 1130 1230 2260 1065 1085 2015 950 920 1730 815 750
0.05 12 2365 1115 1220 2230 1050 1070 1985 935 905 1720 810 745
0.10 25 2330 1100 1205 2200 1040 1060 1960 925 890 1705 805 750
0.15 37 2285 1080 1190 2170 1025 1045 1030 485 880 1695 800 740
0.20 50 2245 1060 1170 2135 1010 1030 1905 900 870 1675 790 735
0.25 62 2200 1040 1160 2100 990 1020 1890 890 860 1665 785 730
0.30 75 2170 1025 1145 2070 980 1005 1870 880 850 1655 780 720
0.40 100 2085 985 1110 1990 940 975 1825 860 835 1610 760 705
0.50 125 1980 935 1075 1910 900 945 1755 830 810 1555 735 690
0.60 150 1890 890 1045 1835 865 915 1670 790 780 1515 715 680
0.70 175 1800 850 1020 1725 815 885 1615 760 770 1445 685 655
0.80 200 1700 805 995 1645 775 855 1525 720 745 1380 650 645
0.90 225 1590 750 980 1520 720 820 1410 665 710 1300 615 625
NOTE − All air data is measured external to unit with 1 in. (25 mm) cleanable filter (not furnished − field provided) in place. Also see Filter Air Resistance table.