Lennox G61MPV Series User manual

Page 1 ©2012 Lennox Industries Inc.
Corp. 0310−L7
G61MPV
Service Literature Revised 02−2012
G61MPV SERIES UNITS
G61MPV series units are high−efficiency multi−position
(upflow, downflow, horizontal right and left) gas furnaces
manufactured with Lennox Duralok Plustheat exchang-
ers formed of an aluminized steel primary with a stainless
steel secondary condensing coil. G61MPV units are avail-
able in heating capacities of 44,000 to 132,000 Btuh
(13.0.0 to 38.6 kW) and cooling applications from 2 to 5
tons (7.0 kW to 17.5 kW). Refer to Engineering Handbook
for proper sizing.
Units are factory equipped for use with natural gas. Kits are
available for conversion to LPG operation. G61MPV model
units are equipped with the two−stage variable speed inte-
grated SureLight® control. All G61MPV units meet the Cali-
fornia 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 recommendations only and do not consti-
tute code.
TABLE OF CONTENTS
Specifications Page 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Data Page 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Identification Page 23. . . . . . . . . . . . . . . . . . . . . . . .
I Unit Components Page 24. . . . . . . . . . . . . . . . . . . . . . .
II Installation Page 50. . . . . . . . . . . . . . . . . . . . . . . . . . . .
III Start Up Page 67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IV Heating System Service Checks Page 68. . . . . . . . .
V Typical Operating Characteristics Page 71. . . . . . . . .
VI Maintenance Page 72. . . . . . . . . . . . . . . . . . . . . . . . . .
VII Wiring and Sequence of Operation Page 75. . . . . .
VIII Field Wiring and Jumper Setting Page 90. . . . . . . .
IX Control Board Troubleshooting Page 95. . . . . . . . . .
IMPORTANT
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person-
al 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
Performance
ModelNo. G61MPV
−36B−045
G61MPV
−36B−070
G61MPV
−36B−071
G61MPV
−36C−090
High Fire Input− Btuh 44,000 66,000 66,000 88,000
Output− Btuh 39,000 61,000 62,000 79,000
Temperature rise range − _F20 − 50 45 − 75 45 − 75 70 − 100
Gas Manifold Pressure (in. w.g.)
Natural Gas / LPG/Propane
3.5 / 10.0 3.5 / 10.0 3.5 / 10.0 3.5 / 10.0
Low Fire Input − Btuh 30,000 45,000 45,000 60,000
Output − Btuh 29,000 43,000 43,000 56,000
Temperature rise range − _F10 − 40 25 − 55 20 − 50 35 − 65
Gas Manifold Pressure (in. w.g.)
Natural Gas / LPG/Propane
1.7 / 4.9 1.7 / 4.9 1.7 / 4.9 1.7 / 4.9
1AFUE 94.1% 94.1% 95.0% 94.3%
Highstatic(CSA)− in.w.g. .80 .80 .80 .80
Connections
in.
Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2 2 / 2 2 / 2
Condensate Drain Trap (PVC pipe) − i.d. 1/2 1/2 1/2 1/2
with field supplied (PVC coupling) − o.d. 3/4 3/4 3/4 3/4
hose with hose clamp − i.d. x o.d. 1−1/4 x 1 1−1/4 x 1 1−1/4 x 1 1−1/4 x 1
GaspipesizeIPS 1/2 1/2 1/2 1/2
Indoor
Blower
Wheelnominaldiameter xwidth −in. 10 x 8 10 x 8 10 x 8 10 x 10
Motoroutput − hp 1/2 1/2 1/2 1/2
Tons(kW) ofadd−oncooling 2 − 3 2 − 3.5 2 − 3.5 2 − 3.5
Air volume range − cfm 610 − 1420 625 − 1395 625 − 1395 600 − 1395
ShippingData lbs. − 1 package 128 151 151 170
Electricalcharacteristics 120 volts − 60 hertz − 1 phase (less than 12 amps)
NOTE − Filters and provisions for mounting are not furnished and must be field provided.
1Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non−weatherized furnaces.
Gas
Heating
Performance
ModelNo. G61MPV
−60C−090
G61MPV
−60C−091
G61MPV
−60C−110
G61MPV
−60C−111
G61MPV
−60D−135
High Fire Input− Btuh 88,000 88,000 110,000 110,000 132,000
Output− Btuh 81,000 84,000 99,000 103,000 122,000
Temperature rise range − _F 40 − 70 40 − 70 50 − 80 50 − 80 65 − 95
Gas Manifold Pressure (in. w.g.)
Natural Gas / LPG/Propane
3.5 / 10.0 3.5 / 10.0 3.5 / 10.0 3.5 / 10.0 3.5 / 10.0
Low Fire Input− Btuh 60,000 60,000 75,000 75,000 90,000
Output− Btuh 57,000 58,000 72,000 72,000 87,000
Temperature rise range − _F 20 − 50 20 − 50 30 − 60 25 − 55 40 − 70
Gas Manifold Pressure (in. w.g.)
Natural Gas / LPG/Propane
1.7 / 4.9 1.7 / 4.9 1.7 / 4.9 1.7 / 4.9 1.7 / 4.9
1AFUE 94.6% 95.0% 94.3% 95.0% 94.6%
Highstatic(CSA)− in.w.g. .80 .80 .80 .80 .80
Connections
in.
Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2 2 / 2 2 / 2 3 / 3
Condensate Drain Trap (PVC pipe) − i.d. 1/2 1/2 1/2 1/2 1/2
with field supplied (PVC coupling) − o.d. 3/4 3/4 3/4 3/4 3/4
hose with hose clamp − i.d. x o.d. 1−1/4 x 1 1−1/4 x 1 1−1/4 x 1 1−1/4 x 1 1−1/4 x 1
GaspipesizeIPS 1/2 1/2 1/2 1/2 1/2
Indoor
Blower
Wheelnominaldiameter xwidth −in. 11−1/2 x 10 11−1/2 x 10 11−1/2 x 10 11−1/2 x 10 11−1/2 x 10
Motoroutput − hp 1 1 1 1 1
Tons(kW) ofadd−oncooling 3.5 − 5 3.5 − 5 3.5 − 5 3.5 − 5 3.5 − 5
Air volume range − cfm 895 − 2215 895 − 2215 740 − 2210 740 − 2210 915 − 2190
ShippingData lbs. − 1 package 180 180 188 188 207
Electricalcharacteristics 120 volts − 60 hertz − 1 phase (less than 12 amps)
NOTE − Filters and provisions for mounting are not furnished and must be field provided.
1Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non−weatherized furnaces.

Page 3
OPTIONAL ACCESSORIES − MUST BE ORDERED EXTRA
B" Width Models C" Width Models D" Width Models
FILTER KITS
1Air Filter and
Rack Kit
Horizontal (end) Size of filter − in. 87L96 − 18 x 25 x 1 87L97 − 20 x 25 x 1 87L98 − 25 x 25 x 1
Side Return Single 44J22 44J22 44J22
Ten Pack 66K63 66K63 66K63
Size of filter − in. 16 x 25 x 1 16 x 25 x 1 16 x 25 x 1
EZ Filter Base Catalog No. − Ship. Wt. − lbs. 73P56 − 7 73P57 − 8 73P58 − 10
Size of field provided filter − in. 16 x 25 x 1 20 x 25 x 1 24 x 24 x 1
CABINET ACCESSORIES
Down−Flow Additive Base 11M60 11M61 11M62
Horizontal Support Frame Kit 56J18 56J18 56J18
Return Air Base 98M60 98M58 98M59
CONDENSATE DRAIN KITS
Condensate Drain Heat Cable 6 ft. 26K68 26K68 26K68
24 ft. 26K69 26K69 26K69
50 ft. 26K70 26K70 26K70
Heat Cable Tape Fiberglass − 1/2 in. x 66 ft. 39G04 39G04 39G04
Aluminum foil − 2 in. x 60 ft. 39G03 39G03 39G03
Condensate Trap Alternate Location Kit − Up−Flow Only 76M20 76M20 76M20
CONTROLS
SignatureStatHome Comfort Control 81M27 81M27 81M27
TERMINATION KITS − See Installation Instructions for specific venting information.
2Termination
Kits
Direct Vent
Applications
Only
Concentric 2 in. 71M80 69M29 − − −
3 in. − − − 60L46 60L46
Wall − Close Couple 2 in. 22G44 − − − − − −
3 in. 44J40 44J40 44J40
Close Couple WTK 2 in. 30G28 − − − − − −
3 in. 81J20 81J20 81J20
2Termination
Kits − Direct or
Non−Direct Vent
Roof 2 in. 15F75 15F75 −−−
Wall − Wall Ring Kit 2 in. 15F74 15F74 315F74
2Roof Termination Flashing Kit − Direct or Non−Direct
Vent − Contains two flashings.
44J41 44J41 44J41
1Cleanable polyurethane frame type filter.
2Kits contain enough parts for two, non−direct vent installations.
3Non−direct vent only.
GAS HEAT ACCESSORIES
Input
High Altitude
Orifice Kit
Natural Gas
Only
High Altitude Pressure Switch Kit
ORDER TWO EACH LPG/Propane Kit LPG/Propane to Natural Gas Kit
7501−10,000 ft. 2001−4500 ft. 4501−7500 ft. 7501−10,000 ft. 0−7500 ft. 7501−10,000 ft. 0−7500 ft. 17501−10,000 ft.
−045 59M17 − − − − − − − − − 59M13 59M14 59M87 59M87
−070 59M17 − − − − − − 56M23 59M13 59M14 59M87 59M87
−071 59M17 75M22 75M22 56M21 59M13 59M14 59M87 59M87
−090 59M17 − − − 75M22 56M21 59M13 59M14 59M87 59M87
−090
(036C−9
and
later
models)
59M17 − − − 24W51 24W49 59M13 59M14 59M87 59M87
−091 47M82 26W85 26W85 26W86 59M13 59M14 59M87 59M87
−110 59M17 − − − 56M23 75M22 59M13 59M14 59M87 59M87
−111 47M82 56M22 56M22 56M23 59M13 59M14 59M87 59M87
−135 59M17 − − − 56M93 56M93 59M13 59M14 59M87 59M87
1High Altitude Orifice Kit is required and must be ordered separately for applications from 7501 to 10,000 ft.

Page 4
BLOWER DATA
BLOWER DATA
G61MPV−36B−045 BLOWER PERFORMANCE (less filter)
0 through 0.80 in. w.g. External Static Pressure Range
ADJUST"
Switch
Positions
Speed Switch Positions
Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ 915 1070 1320 1370 1055 1235 1330 1420
1NORM 830 965 1205 1255 945 1100 1185 1295
740 860 1055 1095 840 970 1050 1150
ADJUST"
Switch
Positions
First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ 830 970 1210 1255 720 820 890 970
1NORM 755 880 1080 1120 665 745 795 875
690 795 950 995 610 685 725 785
1Factory default jumper setting.
N/A − First and second stage HEAT positions shown cannot be used on this model.
NOTES − The effect of static pressure is included in air volumes shown.
First stage HEAT is approximately 91% of the same second stage HEAT speed position.
First stage COOL (two−stage air conditioning units only) is approximately 70%of the same second stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position − minimum 500 cfm.
Lennox Harmony IIItZone Control Applications − Minimum blower speed is 442 cfm.
G61MPV−36B−045 BLOWER MOTOR WATTS
Jumper Speed
Positions
Motor Watts @ Various External Static Pressures − in. wg.
First Stage Second Stage
00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"
Speed
Tap 1 70 90 115 135 155 175 200 220 245 95 120 145 175 190 210 230 255 280
Tap 2 125 145 165 185 205 225 255 280 305 155 175 200 225 255 290 310 335 360
Tap 3 220 250 280 310 340 365 390 415 440 305 335 370 400 435 465 480 495 510
Tap 4 225 260 300 345 375 410 430 450 470 330 360 395 430 460 485 510 530 550
COOL"
Speed
Tap 1 55 70 90 110 125 140 160 175 195 140 165 200 230 255 280 305 325 350
Tap 2 70 90 110 130 155 175 200 220 240 230 260 295 330 360 390 415 435 460
Tap 3 90 110 135 160 185 205 225 245 265 280 315 350 390 430 465 485 505 525
Tap 4 115 135 160 185 210 235 255 280 300 370 410 450 490 520 555 560 565 570
NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"
Speed
Tap 1 65 80 95 110 135 155 170 190 210 80 95 115 135 155 175 200 220 240
Tap 2 85 105 125 150 175 195 220 245 270 110 135 160 185 210 230 255 275 295
Tap 3 150 175 205 230 265 295 320 345 365 205 230 260 295 330 370 390 415 440
Tap 4 165 195 230 265 290 315 340 370 400 240 270 310 345 370 395 425 455 485
COOL"
Speed
Tap 1 45 60 75 95 115 130 145 160 175 110 130 155 185 205 230 250 275 295
Tap 2 60 80 100 115 135 155 175 195 215 165 190 215 240 275 305 330 355 380
Tap 3 70 85 110 130 150 165 190 210 230 195 225 260 290 320 350 375 400 425
Tap 4 85 105 135 160 175 190 215 240 265 265 300 340 380 410 440 460 485 505
−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"
Speed
Tap 1 50 65 85 100 120 140 155 170 185 55 70 90 110 135 155 170 190 205
Tap 2 70 90 105 125 145 165 185 205 230 85 100 125 145 175 200 220 235 250
Tap 3 110 130 155 185 205 225 250 270 290 150 170 195 220 240 265 295 320 350
Tap 4 125 145 170 200 220 240 265 295 320 160 185 215 245 265 290 315 335 360
COOL"
Speed
Tap 1 40 55 70 85 100 120 130 145 160 80 95 115 135 160 185 205 230 255
Tap 2 55 65 80 95 115 135 150 165 185 115 140 170 195 215 235 260 280 300
Tap 3 55 70 90 105 125 145 160 180 195 140 165 195 225 250 270 295 320 345
Tap 4 75 90 105 125 140 155 180 200 225 180 205 235 265 295 325 355 380 410

Page 5
BLOWER DATA
G61MPV−36B−070 BLOWER PERFORMANCE (less filter)
0 through 0.80 in. w.g. External Static Pressure Range
ADJUST"
Switch
Positions
Speed Switch Positions
Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ 895 1025 1290 1340 1015 1190 1280 1395
1NORM 820 940 1155 1210 930 1065 1155 1270
N/A 840 1020 1055 830 950 1010 1105
ADJUST"
Switch
Positions
First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ 820 930 1160 1210 730 815 865 935
1NORM 760 865 1045 1090 680 755 795 855
N/A 775 930 965 625 695 730 775
1Factory default jumper setting.
N/A − First and second stage HEAT positions shown cannot be used on this model.
NOTES − The effect of static pressure is included in air volumes shown.
First stage HEAT is approximately 91% of the same second stage HEAT speed position.
First stage COOL (two−stage air conditioning units only) is approximately 70%of the same second stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position − minimum 500 cfm.
Lennox Harmony IIItZone Control Applications − Minimum blower speed is 458 cfm.
G61MPV−36B−070 BLOWER MOTOR WATTS
Jumper Speed
Positions
Motor Watts @ Various External Static Pressures − in. wg.
First Stage Second Stage
00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"
Speed
Tap 1 70 85 105 130 150 170 190 205 225 110 115 135 155 175 195 215 240 260
Tap 2 100 120 145 165 190 215 235 260 280 130 155 180 205 230 255 280 300 325
Tap 3 185 210 240 270 290 310 345 375 405 250 280 310 340 370 400 425 450 475
Tap 4 200 230 265 295 325 355 385 410 440 285 310 340 365 400 430 455 485 510
COOL"
Speed
Tap 1 55 70 90 110 130 145 160 175 190 135 155 175 200 220 245 270 295 320
Tap 2 75 90 110 130 150 170 190 205 220 185 215 250 285 315 345 370 395 420
Tap 3 85 100 120 145 165 185 205 225 250 235 265 300 335 370 400 425 455 480
Tap 4 105 125 150 170 190 210 235 255 280 315 340 370 395 440 480 510 540 570
NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"
Speed
Tap 1 65 75 95 110 130 150 170 185 200 75 90 110 125 150 170 190 205 225
Tap 2 85 100 120 140 160 180 200 225 245 100 120 145 165 190 210 230 250 270
Tap 3 130 155 180 205 235 265 285 305 325 195 210 230 250 280 315 340 370 395
Tap 4 145 170 200 230 255 280 305 330 355 200 225 255 280 315 355 375 400 425
COOL"
Speed
Tap 1 45 60 80 95 115 130 145 160 175 100 120 140 165 190 215 235 255 275
Tap 2 60 75 95 110 130 145 165 180 200 140 165 190 220 245 265 290 315 340
Tap 3 65 85 105 125 140 155 175 195 215 175 200 230 260 285 310 340 365 390
Tap 4 85 100 120 140 160 180 200 220 240 230 260 295 325 360 390 410 435 455
−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"
Speed
Tap 1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Tap 2 60 75 100 120 140 160 175 195 210 70 90 115 135 160 185 200 220 235
Tap 3 95 120 145 170 190 210 230 245 265 140 160 180 205 225 245 270 295 325
Tap 4 110 130 155 185 205 225 245 270 290 145 165 190 215 235 255 280 305 330
COOL"
Speed
Tap 1 40 55 70 85 100 120 130 145 160 75 90 110 125 150 175 190 210 225
Tap 2 45 60 80 95 115 135 145 160 175 95 120 150 175 200 220 240 260 285
Tap 3 50 65 85 105 125 145 160 175 190 125 150 175 195 220 240 265 290 320
Tap 4 60 75 95 115 135 150 170 190 215 165 190 215 245 265 485 315 340 370

Page 6
BLOWER DATA
G61MPV−36B−071 BLOWER PERFORMANCE (less filter)
0 through 0.80 in. w.g. External Static Pressure Range
ADJUST"
Switch
Positions
Speed Switch Positions
Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ 925 1065 1305 1345 1055 1225 1305 1405
1NORM 840 970 1185 1230 955 1100 1185 1280
775 875 1050 1085 855 975 1040 1140
ADJUST"
Switch
Positions
First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ 840 965 1190 1235 745 835 895 970
1NORM 765 880 1070 1115 695 770 815 875
705 795 955 990 645 705 740 790
1Factory default jumper setting.
N/A − First and second stage HEAT positions shown cannot be used on this model.
NOTES − The effect of static pressure is included in air volumes shown.
First stage HEAT is approximately 91% of the same second stage HEAT speed position.
First stage COOL (two−stage air conditioning units only) is approximately 70%of the same second stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position − minimum 500 cfm.
Lennox Harmony IIItZone Control Applications − Minimum blower speed is 458 cfm.
G61MPV−36B−071 BLOWER MOTOR WATTS
Jumper Speed
Positions
Motor Watts @ Various External Static Pressures − in. wg.
First Stage Second Stage
00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"
Speed
Tap 1 70 90 110 135 160 180 195 215 240 100 120 140 165 190 210 235 255 275
Tap 2 11 5 135 160 185 205 230 250 270 295 160 185 210 230 255 275 295 315 330
Tap 3 205 230 265 295 325 355 380 410 425 290 320 350 380 415 440 465 490 480
Tap 4 220 250 290 325 360 390 425 455 455 310 345 375 410 445 475 500 525 515
COOL"
Speed
Tap 1 55 70 90 110 130 145 165 185 200 145 170 195 220 245 270 295 320 345
Tap 2 7 0 90 115 135 160 180 200 220 240 225 255 285 315 350 375 400 425 445
Tap 3 9 0 105 130 150 170 195 220 240 260 265 300 340 375 415 440 465 490 505
Tap 4 11 0 130 155 180 205 230 250 270 295 360 390 425 460 495 515 540 560 535
NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"
Speed
Tap 1 60 75 95 115 135 155 175 195 215 75 95 115 140 160 180 200 220 240
Tap 2 8 0 100 125 150 180 200 220 240 255 110 135 165 190 220 240 255 275 290
Tap 3 150 170 200 225 250 275 300 325 350 210 235 260 285 315 345 375 405 425
Tap 4 165 190 220 250 280 310 335 360 385 230 260 290 325 355 380 405 430 435
COOL"
Speed
Tap 1 45 60 80 95 115 130 150 165 185 110 130 155 180 205 225 245 265 285
Tap 2 6 0 75 95 115 135 155 170 190 215 160 185 215 245 280 305 330 355 375
Tap 3 7 0 85 105 130 150 170 190 215 235 205 230 260 290 320 350 380 410 420
Tap 4 8 0 100 125 150 170 195 215 240 260 260 290 320 355 390 415 440 470 480
−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"
Speed
Tap 1 50 65 85 100 120 140 155 175 195 70 90 105 125 145 165 185 205 215
Tap 2 6 5 80 100 120 140 165 185 205 225 90 110 130 155 175 195 215 235 250
Tap 3 105 125 150 180 205 225 245 265 290 145 170 195 225 255 270 290 305 325
Tap 4 11 5 135 165 190 215 240 260 285 310 160 185 215 240 270 290 310 330 350
COOL"
Speed
Tap 1 40 55 70 85 100 120 135 155 170 75 95 120 140 165 185 205 225 245
Tap 2 4 5 60 80 100 115 135 150 170 185 115 135 160 190 215 235 255 270 295
Tap 3 5 5 70 90 110 130 150 165 185 205 140 165 190 215 245 265 290 315 340
Tap 4 60 75 100 120 140 165 185 205 225 180 205 235 265 295 320 345 365 390

Page 7
BLOWER DATA
G61MPV−36C−090 BLOWER PERFORMANCE (less filter)
0 through 0.80 in. w.g. External Static Pressure Range
ADJUST"
Switch
Positions
Speed Switch Positions
Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ N/A 1040 1285 1340 1020 1185 1275 1395
1NORM N/A 915 1150 1200 905 1060 1145 1270
N/A N/A 1020 1055 800 925 1010 1100
ADJUST"
Switch
Positions
First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ N/A 940 1160 1210 705 790 845 920
1NORM N/A 840 1040 1075 650 730 770 830
N/A N/A 915 945 600 670 705 750
1Factory default jumper setting.
N/A − First and second stage HEAT positions shown cannot be used on this model.
NOTES − The effect of static pressure is included in air volumes shown.
First stage HEAT is approximately 91% of the same second stage HEAT speed position.
First stage COOL (two−stage air conditioning units only) is approximately 70%of the same second stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position − minimum 500 cfm.
Lennox Harmony IIItZone Control Applications − Minimum blower speed is 479 cfm.
G61MPV−36C−090 BLOWER MOTOR WATTS
Jumper Speed
Positions
Motor Watts @ Various External Static Pressures − in. wg.
First Stage Second Stage
00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"
Speed
Tap 1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Tap 2 75 90 110 130 155 185 205 225 250 90 110 140 165 185 205 235 260 290
Tap 3 125 150 175 200 230 260 290 325 355 170 195 230 265 290 330 360 395 425
Tap 4 130 160 200 235 265 295 325 355 385 185 220 255 290 325 360 395 430 460
COOL"
Speed
Tap 1 35 50 70 90 105 125 140 160 175 85 110 135 160 185 205 235 265 295
Tap 2 45 60 80 100 125 150 170 185 205 125 155 185 220 245 275 305 330 360
Tap 3 60 75 95 110 135 160 180 200 220 165 195 230 265 300 330 355 380 410
Tap 4 65 85 110 135 160 180 205 225 245 210 245 285 325 360 390 425 460 495
NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"
Speed
Tap 1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Tap 2 50 65 90 110 135 155 175 200 220 60 80 105 130 155 185 205 220 240
Tap 3 90 110 145 175 200 225 245 270 290 110 135 170 205 230 250 285 320 355
Tap 4 90 120 155 190 205 225 250 280 305 140 165 190 220 255 290 315 335 360
COOL"
Speed
Tap 1 35 45 60 75 95 115 130 145 160 60 80 110 135 155 175 195 215 235
Tap 2 40 55 70 90 110 130 150 165 185 105 125 145 170 200 225 250 270 295
Tap 3 45 60 80 95 115 135 155 175 195 115 140 175 205 235 265 290 315 335
Tap 4 50 65 85 105 130 155 180 200 220 155 185 220 255 285 315 345 380 415
−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"
Speed
Tap 1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Tap 2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Tap 3 65 85 105 130 155 180 200 225 250 85 105 135 160 185 205 230 250 270
Tap 4 75 95 120 140 165 190 210 230 250 90 115 140 170 190 215 245 275 305
COOL"
Speed
Tap 1 30 40 55 75 90 105 120 135 150 55 65 85 105 125 150 170 190 210
Tap 2 40 50 65 80 100 120 130 145 160 65 90 120 145 165 185 205 225 250
Tap 3 40 55 70 90 105 125 140 160 180 85 105 135 165 185 210 235 260 285
Tap 4 45 60 75 90 115 135 155 170 190 105 125 150 175 210 240 275 305 335

Page 8
BLOWER DATA
G61MPV−60C−090 BLOWER PERFORMANCE (less filter)
Bottom Return Air, Return Air from Both Sides or Return Air from Bottom and One Side.
0 through 0.80 in. w.g. External Static Pressure Range
ADJUST"
Switch
Positions
Speed Switch Positions
Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ 1500 1675 1880 2090 1605 1710 1925 2165
1NORM 1355 1545 1720 1900 1440 1560 1755 1960
1194 1365 1540 1695 1275 1380 1590 1755
ADJUST"
Switch
Positions
First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ 1360 1560 1730 1910 1105 1185 1355 1545
1NORM 1220 1405 1585 1740 995 1080 1205 1345
1105 1235 1410 1570 890 960 1090 1215
1Factory default jumper setting.
NOTES − The effect of static pressure is included in air volumes shown.
First stage HEAT is approximately 91% of the same second stage HEAT speed position.
First stage COOL (two−stage air conditioning units only) is approximately 70%of the same second stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position − minimum 500 cfm.
Lennox Harmony IIItZone Control Applications − Minimum blower speed is 449 cfm.
G61MPV−60C−090 BLOWER MOTOR WATTS
Jumper Speed
Positions
Motor Watts @ Various External Static Pressures − in. wg.
First Stage Second Stage
00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"
Speed
Tap 1 190 215 245 275 305 340 365 390 420 245 275 315 350 380 410 440 475 510
Tap 2 265 300 340 380 415 450 480 510 540 350 385 420 455 490 525 555 580 610
Tap 3 380 415 450 485 520 555 595 630 665 485 520 555 595 640 685 720 755 790
Tap 4 495 535 580 625 660 700 735 770 805 650 695 750 800 850 900 925 955 985
COOL"
Speed
Tap 1 115 135 160 185 205 230 255 275 300 305 340 375 410 440 475 505 535 565
Tap 2 145 165 190 215 240 265 285 305 325 355 390 430 470 510 550 580 610 635
Tap 3 170 200 240 275 305 335 370 400 430 510 555 600 645 690 730 765 795 830
Tap 4 265 295 330 365 400 435 465 500 535 725 780 835 895 935 975 1005 1035 1065
NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"
Speed
Tap 1 150 170 195 220 245 270 295 325 350 180 210 245 280 305 330 365 400 430
Tap 2 200 230 270 305 330 355 385 415 450 265 295 335 375 405 430 465 500 535
Tap 3 270 310 355 395 425 460 490 525 560 370 400 435 470 515 555 585 615 645
Tap 4 390 420 455 490 525 555 595 630 670 495 530 570 605 645 685 720 755 795
COOL"
Speed
Tap 1 90 110 130 155 175 195 215 235 255 220 250 285 320 350 385 415 450 485
Tap 2 110 130 155 180 200 220 245 265 285 270 305 345 385 420 455 485 515 545
Tap 3 145 165 190 215 245 270 295 320 340 390 425 465 500 540 580 610 640 670
Tap 4 180 205 240 270 300 330 365 395 430 540 580 625 670 710 755 795 830 870
−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"
Speed
Tap 1 110 135 165 190 215 235 255 280 300 155 175 195 215 245 270 295 315 340
Tap 2 155 175 200 225 255 285 310 335 365 190 215 250 285 310 335 365 395 425
Tap 3 200 230 270 305 335 365 395 420 450 255 290 335 375 400 430 465 495 530
Tap 4 270 305 345 385 415 450 480 515 545 345 385 425 465 495 530 565 605 645
COOL"
Speed
Tap 1 70 85 105 125 145 165 185 205 225 160 190 220 255 275 300 330 360 390
Tap 2 80 100 120 140 165 190 210 225 245 195 225 260 295 325 350 385 415 450
Tap 3 110 130 160 185 205 225 250 275 300 295 330 365 400 430 460 495 535 570
Tap 4 155 175 195 220 245 270 295 315 340 400 435 470 510 545 585 610 640 665

Page 9
BLOWER DATA
G61MPV−60C−090 BLOWER PERFORMANCE (less filter)
Side Return Air with Optional RAB Return Air Base
0 through 0.80 in. w.g. External Static Pressure Range
ADJUST"
Switch
Positions
Speed Switch Positions
Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ 1440 1630 1810 2015 1525 1655 1860 2100
1NORM 1300 1485 1655 1830 1385 1500 1695 1905
1155 1310 1480 1640 1240 1320 1510 1695
ADJUST"
Switch
Positions
First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ 1320 1490 1665 1840 1060 1135 1285 1455
1NORM 1180 1345 1515 1680 960 1035 1165 1310
1055 1180 1340 1490 865 920 1050 1165
1Factory default jumper setting.
NOTES − The effect of static pressure is included in air volumes shown.
First stage HEAT is approximately 91% of the same second stage HEAT speed position.
First stage COOL (two−stage air conditioning units only) is approximately 70%of the same second stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position − minimum 500 cfm.
Lennox Harmony IIItZone Control Applications − Minimum blower speed is 449 cfm.
G61MPV−60C−090 BLOWER MOTOR WATTS
Jumper Speed
Positions
Motor Watts @ Various External Static Pressures − in. wg.
First Stage Second Stage
00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"
Speed
Tap 1 180 205 235 260 290 320 350 380 410 230 260 290 320 355 390 420 445 475
Tap 2 250 280 315 350 385 425 455 485 515 325 360 400 435 465 495 530 565 595
Tap 3 345 380 415 455 485 515 550 580 615 460 490 520 550 595 640 675 715 750
Tap 4 465 505 545 585 625 660 695 730 760 665 685 710 735 775 820 860 900 940
COOL"
Speed
Tap 1 110 130 150 175 195 215 240 265 290 275 305 340 380 410 440 470 505 540
Tap 2 130 155 175 200 220 245 265 290 315 360 390 420 455 485 515 550 590 625
Tap 3 160 190 220 255 280 305 335 360 390 490 530 570 610 645 680 715 750 785
Tap 4 220 255 295 330 365 400 430 460 490 695 750 805 855 895 935 965 995 1025
NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"
Speed
Tap 1 145 165 190 210 235 260 285 310 335 170 195 230 260 290 320 350 375 400
Tap 2 195 220 250 275 305 335 365 395 420 255 285 315 345 370 395 430 465 500
Tap 3 280 305 335 360 395 425 455 485 515 340 375 410 450 480 510 545 580 615
Tap 4 370 400 430 460 495 530 565 595 625 465 500 535 575 610 645 685 725 765
COOL"
Speed
Tap 1 80 95 120 140 165 190 210 235 255 190 225 265 305 330 355 390 420 455
Tap 2 100 120 140 165 190 215 235 255 275 265 295 325 355 390 420 455 495 530
Tap 3 140 160 185 205 235 260 285 305 325 375 410 440 475 500 530 570 610 650
Tap 4 180 205 240 270 300 325 350 380 405 520 560 605 645 685 720 760 805 845
−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"
Speed
Tap 1 100 125 150 175 200 220 245 265 290 135 155 180 200 225 250 275 300 330
Tap 2 150 165 185 205 235 265 290 310 335 170 200 235 265 290 320 350 375 405
Tap 3 210 230 255 275 310 345 370 400 425 255 285 315 350 370 390 430 470 510
Tap 4 260 290 320 350 390 430 455 480 505 340 375 410 445 475 510 535 565 590
COOL"
Speed
Tap 1 70 85 105 125 140 160 180 200 220 155 175 200 225 255 290 315 340 365
Tap 2 80 95 115 135 155 175 200 220 245 185 210 235 260 295 325 355 385 415
Tap 3 105 125 150 175 200 220 240 265 290 255 290 330 365 400 430 460 490 520
Tap 4 135 160 185 215 235 260 285 305 330 370 400 440 475 505 530 565 600 635

Page 10
BLOWER DATA
G61MPV−60C−090 BLOWER PERFORMANCE (less filter)
Single Side Return Air − Air volumes in bold require field fabricated transition to accommodate 20 x 25 x 1 in. cleanable air filter in
order to maintain proper air velocity across the filter.
0 through 0.80 in. w.g. External Static Pressure Range
ADJUST"
Switch
Positions
Speed Switch Positions
Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ 1450 1640 1820 2055 1575 1690 1895 2135
1NORM 1320 1510 1700 1870 1405 1530 1735 1935
1165 1320 1500 1665 1250 1355 1560 1735
ADJUST"
Switch
Positions
First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm
112 3 4 1 2 3 14
+ 1315 1510 1695 1875 1080 1160 1315 1490
1NORM 1190 1365 1545 1715 985 1060 1185 1330
1075 1205 1370 1520 865 930 1065 1185
1Factory default jumper setting.
NOTES − The effect of static pressure is included in air volumes shown.
First stage HEAT is approximately 91% of the same second stage HEAT speed position.
First stage COOL (two−stage air conditioning units only) is approximately 70%of the same second stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position − minimum 500 cfm.
Lennox Harmony IIItZone Control Applications − Minimum blower speed is 449 cfm.
G61MPV−60C−090 BLOWER MOTOR WATTS
Jumper Speed
Positions
Motor Watts @ Various External Static Pressures − in. wg.
First Stage Second Stage
00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"
Speed
Tap 1 170 200 230 265 295 325 355 385 415 225 255 290 325 360 390 425 455 490
Tap 2 255 285 320 355 390 425 455 490 520 330 370 410 455 485 515 540 560 585
Tap 3 345 385 430 475 515 555 585 610 640 445 480 520 560 610 660 700 735 775
Tap 4 470 515 560 610 650 685 725 765 800 650 695 745 800 840 885 915 950 980
COOL"
Speed
Tap 1 110 130 155 180 205 225 245 270 290 285 320 355 390 430 465 500 535 565
Tap 2 125 150 175 205 225 250 275 300 325 355 390 430 470 500 530 570 605 645
Tap 3 170 195 230 260 290 325 355 385 415 515 550 590 625 670 710 750 795 840
Tap 4 240 275 315 355 380 405 445 485 525 740 785 835 885 920 955 990 1020 1050
NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"
Speed
Tap 1 145 165 190 215 240 265 290 315 345 175 200 235 265 300 330 360 385 415
Tap 2 195 225 255 290 320 345 375 405 435 260 290 325 355 390 425 455 490 520
Tap 3 265 300 335 370 405 435 470 505 540 360 395 435 470 515 555 585 620 650
Tap 4 385 420 460 495 525 555 590 625 660 475 515 560 600 640 685 720 760 800
COOL"
Speed
Tap 1 85 100 125 145 170 200 215 235 255 200 230 270 310 340 370 400 430 460
Tap 2 105 125 150 170 195 220 240 260 280 260 295 330 365 400 440 470 500 530
Tap 3 135 160 185 215 240 270 290 315 335 410 440 470 500 540 580 610 640 670
Tap 4 170 200 235 265 305 340 365 390 415 550 585 620 655 695 740 780 825 865
−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"
Speed
Tap 1 105 130 155 180 205 225 245 270 290 130 155 180 204 230 260 285 310 335
Tap 2 145 165 195 220 250 280 305 335 360 170 195 230 265 295 325 355 385 420
Tap 3 190 220 250 285 315 345 375 405 440 245 280 315 350 385 420 450 485 520
Tap 4 270 295 325 355 395 430 465 500 530 340 375 415 455 490 525 560 595 625
COOL"
Speed
Tap 1 65 80 100 120 140 160 180 205 225 155 180 215 245 265 290 320 345 375
Tap 2 75 90 110 130 155 180 200 220 245 190 220 250 275 305 335 370 400 430
Tap 3 100 120 150 175 200 220 245 265 290 290 320 355 385 415 445 485 520 560
Tap 4 135 160 185 215 240 265 290 315 335 405 435 465 495 540 585 610 640 665