Lennox G61MPV−36C−090, G61MPV−36B−045, G61MPV−36B−070, G61MPV−36B−071, G61MPV−60C−090 Service Manual

Corp. 0310−L7

Service Literature

Revised 03−2008

G61MPV SERIES UNITS

G61MPV series units are high−efficiency multi−position
(upflow, downflow, horizontal right and left) gas furnaces
manufactured with Lennox Duralok Plust heat exchang-
ers formed of an aluminized steel primary with a stainless
steel secondary condensing coil. G61MPV units are avail­able 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 inte­grated SureLight® control. All G61MPV units meet the Cali­fornia Nitrogen Oxides (NO
sonal Efficiency requirements. All units use a redundant gas
valve to assure safety shut−off as required by C.S.A.

) Standards and California Sea-

x

G61MPV

All specifications in this manual are subject to change. Pro­cedures outlined in this manual are presented as a recom­mendation 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 consti­tute code.

TABLE OF CONTENTS

Specifications Page 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Blower Data Page 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Identification Page 23. . . . . . . . . . . . . . . . . . . . . . . .

I Unit Components Page 24. . . . . . . . . . . . . . . . . . . . . . .

II Installation Page 47. . . . . . . . . . . . . . . . . . . . . . . . . . . .

III Start Up Page 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

IV Heating System Service Checks Page 62. . . . . . . . .

V Typical Operating Characteristics Page 67. . . . . . . . .

VI Maintenance Page 68. . . . . . . . . . . . . . . . . . . . . . . . . .

VII Wiring and Sequence of Operation Page 71. . . . . .

VIII Field Wiring and Jumper Setting Page 86. . . . . . . .

IX Control Board Troubleshooting Page 91. . . . . . . . . .

IMPORTANT

Improper installation, adjustment, alteration, service
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 discon­nect 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 1

© 2003 Lennox Industries Inc.

SPECIFICATIONS

g

g

g

g

Gas
Heating
Performance

High Fire

ModelNo. G61MPV

−36B−045

Input− Btuh

44,000 66,000 66,000 88,000

G61MPV

−36B−070

G61MPV

−36B−071

G61MPV

−36C−090

Output− Btuh 39,000 61,000 62,000 79,000

Temperature rise range − _F 20 − 50 45 − 75 45 − 75 70 − 100

Gas Manifold Pressure (in. w.g.)

3.5 / 10.0 3.5 / 10.0 3.5 / 10.0 3.5 / 10.0

Natural Gas / LPG/Propane

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 − _F 10 − 40 25 − 55 20 − 50 35 − 65

Gas Manifold Pressure (in. w.g.)

1.7 / 4.9 1.7 / 4.9 1.7 / 4.9 1.7 / 4.9

Natural Gas / LPG/Propane

1

AFUE 94.1% 94.1% 95.0% 94.3%

Highstatic(CSA)− in.w.g. .80 .80 .80 .80

Connections
in.

Condensate Drain Trap (PVC pipe) − i.d.

Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2 2 / 2 2 / 2

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.

1

Annual 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

High Fire

ModelNo. G61MPV

−60C−090

Input− Btuh 88,000

G61MPV

−60C−091

G61MPV

−60C−110

G61MPV

−60C−111

G61MPV

−60D−135

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.)

3.5 / 10.0 3.5 / 10.0 3.5 / 10.0 3.5 / 10.0 3.5 / 10.0

Natural Gas / LPG/Propane

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.)

1.7 / 4.9 1.7 / 4.9 1.7 / 4.9 1.7 / 4.9 1.7 / 4.9

Natural Gas / LPG/Propane

1

AFUE 94.6% 95.0% 94.3% 95.0% 94.6%

Highstatic(CSA)− in.w.g. .80 .80 .80 .80 .80

Connections
in.

Condensate Drain Trap (PVC pipe) − i.d. 1/2

Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2 2 / 2 2 / 2 3 / 3

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.

1

Annual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non−weatherized furnaces.

Page 2

OPTIONAL ACCESSORIES − MUST BE ORDERED EXTRA

p

Di

t

Applications

p

Kit

B" Width Models C" Width Models D" Width Models

FILTER KITS

1

Air Filter and

Rack Kit

EZ Filter Base

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

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

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

6 ft. 26K68 26K68 26K68

24 ft. 26K69 26K69 26K69

50 ft. 26K70 26K70 26K70

CONTROLS

SignatureStatt Home Comfort Control 81M27 81M27 81M27

TERMINATION KITS − See Installation Instructions for specific venting information.

2

Termination

Concentric

Kits

rect Ven

Applications

Wall − Close Couple

Only

Close Couple WTK 2 in. 30G28 − − − − − −

2

Termination

s − Direct or

Non−Direct Vent

2

Roof Termination Flashing Kit − Direct or Non−Direct

Roof 2 in. 15F75 15F75

Wall − Wall Ring Kit 2 in. 15F74 15F74

Vent − Contains two flashings.

1

Cleanable polyurethane frame type filter.

2

Kits contain enough parts for two, non−direct vent installations.

3

Non−direct vent only.

2 in. 71M80 69M29 − − −

3 in. − − − 60L46 60L46

2 in. 22G44 − − − − − −

3 in. 44J40 44J40 44J40

3 in. 81J20 81J20 81J20

− − −

3

15F74

44J41 44J41 44J41

GAS HEAT ACCESSORIES

High Altitude

Orifice Kit

Input

Natural Gas

Only

7501−10,000 ft. 2001−4500 ft. 4501−7500 ft. 7501−10,000 ft. 0−7500 ft. 7501−10,000 ft. 0−7500 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

1

High Altitude Orifice Kit is required and must be ordered separately for applications from 7501 to 10,000 ft.

High Altitude Pressure Switch Kit

ORDER TWO EACH

Page 3

LPG/Propane Kit

LPG/Propane to

Natural Gas Kit

1

7501−10,000 ft.

BLOWER DATA

ADJUST"

Stc

Positions

BLOWER DATA

G61MPV−36B−045 BLOWER PERFORMANCE (less filter)
0 through 0.80 in. w.g. External Static Pressure Range



Switch

Positions

1

ADJUST"

Switch

Positions

1

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 442 cfm.

G61MPV−36B−045 BLOWER MOTOR WATTS

Jumper Speed

+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 915 1070 1320 1370 1055 1235 1330 1420

NORM 830 965 1205 1255 945 1100 1185 1295

 740 860 1055 1095 840 970 1050 1150

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 830 970 1210 1255 720 820 890 970

NORM 755 880 1080 1120 665 745 795 875

 690 795 950 995 610 685 725 785

HEAT speed position.

Motor Watts @ Various External Static Pressures − in. wg.

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

70 90 11 5 135 155 175 200 220 245 95 120 145 175 190 210 230 255 280

125

145 165 185 205 225 255 280 305 155 175 200 225 255 290 310 335 360

220 250 280 310 340 365 390 415 440 305 335 370 400 435 465 480 495 510

225 260 300 345 375 410 430 450 470 330 360 395 430 460 485 510 530 550

55 70 90 110 125 140 160 175 195 140 165 200 230 255 280 305 325 350

90 11 0 130 155 175 200 220 240 230 260 295 330 360 390 415 435 460

70

90

110 135 160 185 205 225 245 265 280 315 350 390 430 465 485 505 525

115 135 160 185 210 235 255 280 300 370 410 450 490 520 555 560 565 570

65 80 95 110 135 155 170 190 210 80 95 115 135 155 175 200 220 240

85

105 125 150 175 195 220 245 270 110 135 160 185 210 230 255 275 295

150 175 205 230 265 295 320 345 365 205 230 260 295 330 370 390 415 440

165 195 230 265 290 315 340 370 400 240 270 310 345 370 395 425 455 485

45 60 75 95 115 130 145 160 175 110 130 155 185 205 230 250 275 295

60

80 100 11 5 135 155 175 195 215 165 190 215 240 275 305 330 355 380

70

85 11 0 130 150 165 190 210 230 195 225 260 290 320 350 375 400 425

85 105 135 160 175 190 215 240 265 265 300 340 380 410 440 460 485 505

50 65 85 100 120 140 155 170 185 55 70 90 110 135 155 170 190 205

70

90 105 125 145 165 185 205 230 85 100 125 145 175 200 220 235 250

110

130 155 185 205 225 250 270 290 150 170 195 220 240 265 295 320 350

125 145 170 200 220 240 265 295 320 160 185 215 245 265 290 315 335 360

40 55 70 85 100 120 130 145 160 80 95 115 135 160 185 205 230 255

55

65 80 95 115 135 150 165 185 11 5 140 170 195 215 235 260 280 300

70 90 105 125 145 160 180 195 140 165 195 225 250 270 295 320 345

55

75 90 105 125 140 155 180 200 225 180 205 235 265 295 325 355 380 410

Speed Switch Positions

1

4

1

4

Page 4

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−36B−070 BLOWER PERFORMANCE (less filter)
0 through 0.80 in. w.g. External Static Pressure Range



Switch

Positions

1

ADJUST"

Switch

Positions

1

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 458 cfm.

G61MPV−36B−070 BLOWER MOTOR WATTS

Jumper Speed

+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 895 1025 1290 1340 1015 1190 1280 1395

NORM 820 940 1155 1210 930 1065 1155 1270

 N/A 840 1020 1055 830 950 1010 1105

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 820 930 1160 1210 730 815 865 935

NORM 760 865 1045 1090 680 755 795 855

 N/A 775 930 965 625 695 730 775

HEAT speed position.

Motor Watts @ Various External Static Pressures − in. wg.

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

70 85 105 130 150 170 190 205 225 110 11 5 135 155 175 195 215 240 260

120 145 165 190 215 235 260 280 130 155 180 205 230 255 280 300 325

100

210 240 270 290 310 345 375 405 250 280 310 340 370 400 425 450 475

185

200 230 265 295 325 355 385 410 440 285 310 340 365 400 430 455 485 510

55 70 90 110 130 145 160 175 190 135 155 175 200 220 245 270 295 320

75

90 11 0 130 150 170 190 205 220 185 215 250 285 315 345 370 395 420

85 100 120 145 165 185 205 225 250 235 265 300 335 370 400 425 455 480

125 150 170 190 210 235 255 280 315 340 370 395 440 480 510 540 570

105

65 75 95 110 130 150 170 185 200 75 90 110 125 150 170 190 205 225

85

100 120 140 160 180 200 225 245 100 120 145 165 190 210 230 250 270

155 180 205 235 265 285 305 325 195 210 230 250 280 315 340 370 395

130

145

170 200 230 255 280 305 330 355 200 225 255 280 315 355 375 400 425

45 60 80 95 115 130 145 160 175 100 120 140 165 190 215 235 255 275

60

75 95 11 0 130 145 165 180 200 140 165 190 220 245 265 290 315 340

65 85 105 125 140 155 175 195 215 175 200 230 260 285 310 340 365 390

85 100 120 140 160 180 200 220 240 230 260 295 325 360 390 410 435 455

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

60

75 100 120 140 160 175 195 210 70 90 115 135 160 185 200 220 235

95 120 145 170 190 210 230 245 265 140 160 180 205 225 245 270 295 325

130 155 185 205 225 245 270 290 145 165 190 215 235 255 280 305 330

110

40 55 70 85 100 120 130 145 160 75 90 110 125 150 175 190 210 225

45

60 80 95 115 135 145 160 175 95 120 150 175 200 220 240 260 285

50 65 85 105 125 145 160 175 190 125 150 175 195 220 240 265 290 320

60 75 95 115 135 150 170 190 215 165 190 215 245 265 485 315 340 370

Speed Switch Positions

1

4

1

4

Page 5

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−36B−071 BLOWER PERFORMANCE (less filter)
0 through 0.80 in. w.g. External Static Pressure Range



Switch

Positions

1

ADJUST"

Switch

Positions

1

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 458 cfm.

G61MPV−36B−071 BLOWER MOTOR WATTS

Jumper Speed

+" (Plus) SETTING (Adjust" Jumper at +" Setting)

HEAT"

Speed

Tap 1 70 90 11 0 135 160 180 195 215 240 100 120 140 165 190 210 235 255 275

Tap 2 115

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

Tap 3 9 0 105 130 150 170 195 220 240 260 265 300 340 375 415 440 465 490 505

Tap 4 110 130 155 180 205 230 250 270 295 360 390 425 460 495 515 540 560 535

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)

HEAT"

Speed

Tap 1 60 75 95 115 135 155 175 195 215 75 95 11 5 140 160 180 200 220 240

Tap 2 8 0

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 11 5 130 150 165 185 11 0 130 155 180 205 225 245 265 285

Tap 2 6 0

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

Tap 3 105 125 150 180 205 225 245 265 290 145 170 195 225 255 270 290 305 325

Tap 4 115 135 165 190 215 240 260 285 310 160 185 215 240 270 290 310 330 350

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

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

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 925 1065 1305 1345 1055 1225 1305 1405

NORM 840 970 1185 1230 955 1100 1185 1280

 775 875 1050 1085 855 975 1040 1140

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 840 965 1190 1235 745 835 895 970

NORM 765 880 1070 1115 695 770 815 875

 705 795 955 990 645 705 740 790

HEAT speed position.

Motor Watts @ Various External Static Pressures − in. wg.

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

135 160 185 205 230 250 270 295 160 185 210 230 255 275 295 315 330

90 11 5 135 160 180 200 220 240 225 255 285 315 350 375 400 425 445

100 125 150 180 200 220 240 255 11 0 135 165 190 220 240 255 275 290

75 95 115 135 155 170 190 215 160 185 215 245 280 305 330 355 375

80 100 120 140 165 185 205 225 90 11 0 130 155 175 195 215 235 250

60 80 100 115 135 150 170 185 115 135 160 190 215 235 255 270 295

Speed Switch Positions

1

4

1

4

Page 6

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−36C−090 BLOWER PERFORMANCE (less filter)
0 through 0.80 in. w.g. External Static Pressure Range



Switch

Positions

1

ADJUST"

Switch

Positions

1

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 479 cfm.

G61MPV−36C−090 BLOWER MOTOR WATTS

Jumper Speed

+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ N/A 1040 1285 1340 1020 1185 1275 1395

NORM N/A 915 1150 1200 905 1060 1145 1270

 N/A N/A 1020 1055 800 925 1010 1100

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ N/A 940 1160 1210 705 790 845 920

NORM N/A 840 1040 1075 650 730 770 830

 N/A N/A 915 945 600 670 705 750

HEAT speed position.

Motor Watts @ Various External Static Pressures − in. wg.

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

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

90 11 0 130 155 185 205 225 250 90 110 140 165 185 205 235 260 290

75

150 175 200 230 260 290 325 355 170 195 230 265 290 330 360 395 425

125

130 160 200 235 265 295 325 355 385 185 220 255 290 325 360 395 430 460

35 50 70 90 105 125 140 160 175 85 110 135 160 185 205 235 265 295

45

60 80 100 125 150 170 185 205 125 155 185 220 245 275 305 330 360

60 75 95 110 135 160 180 200 220 165 195 230 265 300 330 355 380 410

85 11 0 135 160 180 205 225 245 210 245 285 325 360 390 425 460 495

65

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

50

65 90 11 0 135 155 175 200 220 60 80 105 130 155 185 205 220 240

110 145 175 200 225 245 270 290 110 135 170 205 230 250 285 320 355

90

90

120 155 190 205 225 250 280 305 140 165 190 220 255 290 315 335 360

35 45 60 75 95 115 130 145 160 60 80 110 135 155 175 195 215 235

40

55 70 90 110 130 150 165 185 105 125 145 170 200 225 250 270 295

45 60 80 95 115 135 155 175 195 115 140 175 205 235 265 290 315 335

50 65 85 105 130 155 180 200 220 155 185 220 255 285 315 345 380 415

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

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

65 85 105 130 155 180 200 225 250 85 105 135 160 185 205 230 250 270

95 120 140 165 190 210 230 250 90 115 140 170 190 215 245 275 305

75

30 40 55 75 90 105 120 135 150 55 65 85 105 125 150 170 190 210

40

50 65 80 100 120 130 145 160 65 90 120 145 165 185 205 225 250

40 55 70 90 105 125 140 160 180 85 105 135 165 185 210 235 260 285

45 60 75 90 115 135 155 170 190 105 125 150 175 210 240 275 305 335

Speed Switch Positions

1

4

1

4

Page 7

BLOWER DATA

ADJUST"

Stc

Positions

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



Switch

Positions

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

2 3 4 1 2 3

1

+ 1500 1675 1880 2090 1605 1710 1925 2165

1

NORM 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

1

1

2 3 4 1 2 3

+ 1360 1560 1730 1910 1105 1185 1355 1545

1

NORM 1220 1405 1585 1740 995 1080 1205 1345

 1105 1235 1410 1570 890 960 1090 1215

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 449 cfm.

HEAT speed position.

G61MPV−60C−090 BLOWER MOTOR WATTS

Motor Watts @ Various External Static Pressures − in. wg.

Jumper Speed

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

COOL"

Speed

190 215 245 275 305 340 365 390 420 245 275 315 350 380 410 440 475 510

Tap 1

265

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

300 340 380 415 450 480 510 540 350 385 420 455 490 525 555 580 610

380 415 450 485 520 555 595 630 665 485 520 555 595 640 685 720 755 790

495 535 580 625 660 700 735 770 805 650 695 750 800 850 900 925 955 985

115 135 160 185 205 230 255 275 300 305 340 375 410 440 475 505 535 565

145

165 190 215 240 265 285 305 325 355 390 430 470 510 550 580 610 635

170 200 240 275 305 335 370 400 430 510 555 600 645 690 730 765 795 830

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

COOL"

Speed

150 170 195 220 245 270 295 325 350 180 210 245 280 305 330 365 400 430

Tap 1

200

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

230 270 305 330 355 385 415 450 265 295 335 375 405 430 465 500 535

270 310 355 395 425 460 490 525 560 370 400 435 470 515 555 585 615 645

390 420 455 490 525 555 595 630 670 495 530 570 605 645 685 720 755 795

90 11 0 130 155 175 195 215 235 255 220 250 285 320 350 385 415 450 485

110

130 155 180 200 220 245 265 285 270 305 345 385 420 455 485 515 545

145

165 190 215 245 270 295 320 340 390 425 465 500 540 580 610 640 670

205 240 270 300 330 365 395 430 540 580 625 670 710 755 795 830 870

180

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

COOL"

Speed

110 135 165 190 215 235 255 280 300 155 175 195 215 245 270 295 315 340

Tap 1

155

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

175 200 225 255 285 310 335 365 190 215 250 285 310 335 365 395 425

200

230 270 305 335 365 395 420 450 255 290 335 375 400 430 465 495 530

270 305 345 385 415 450 480 515 545 345 385 425 465 495 530 565 605 645

70 85 105 125 145 165 185 205 225 160 190 220 255 275 300 330 360 390

80

100 120 140 165 190 210 225 245 195 225 260 295 325 350 385 415 450

110 130 160 185 205 225 250 275 300 295 330 365 400 430 460 495 535 570

155 175 195 220 245 270 295 315 340 400 435 470 510 545 585 610 640 665

Speed Switch Positions

1

4

1

4

Page 8

BLOWER DATA

ADJUST"

Stc

Positions

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



Switch

Positions

1

ADJUST"

Switch

Positions

1

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 449 cfm.

G61MPV−60C−090 BLOWER MOTOR WATTS

Jumper Speed

+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

2 3 4 1 2 3

1

+ 1440 1630 1810 2015 1525 1655 1860 2100

NORM 1300 1485 1655 1830 1385 1500 1695 1905

 1155 1310 1480 1640 1240 1320 1510 1695

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1320 1490 1665 1840 1060 1135 1285 1455

NORM 1180 1345 1515 1680 960 1035 1165 1310

 1055 1180 1340 1490 865 920 1050 1165

HEAT speed position.

Motor Watts @ Various External Static Pressures − in. wg.

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

180 205 235 260 290 320 350 380 410 230 260 290 320 355 390 420 445 475

250

280 315 350 385 425 455 485 515 325 360 400 435 465 495 530 565 595

345 380 415 455 485 515 550 580 615 460 490 520 550 595 640 675 715 750

465 505 545 585 625 660 695 730 760 665 685 710 735 775 820 860 900 940

110 130 150 175 195 215 240 265 290 275 305 340 380 410 440 470 505 540

130

155 175 200 220 245 265 290 315 360 390 420 455 485 515 550 590 625

160

190 220 255 280 305 335 360 390 490 530 570 610 645 680 715 750 785

220 255 295 330 365 400 430 460 490 695 750 805 855 895 935 965 995 1025

145 165 190 210 235 260 285 310 335 170 195 230 260 290 320 350 375 400

195

220 250 275 305 335 365 395 420 255 285 315 345 370 395 430 465 500

280 305 335 360 395 425 455 485 515 340 375 410 450 480 510 545 580 615

370 400 430 460 495 530 565 595 625 465 500 535 575 610 645 685 725 765

80 95 120 140 165 190 210 235 255 190 225 265 305 330 355 390 420 455

100

120 140 165 190 215 235 255 275 265 295 325 355 390 420 455 495 530

140

160 185 205 235 260 285 305 325 375 410 440 475 500 530 570 610 650

205 240 270 300 325 350 380 405 520 560 605 645 685 720 760 805 845

180

100 125 150 175 200 220 245 265 290 135 155 180 200 225 250 275 300 330

150

165 185 205 235 265 290 310 335 170 200 235 265 290 320 350 375 405

210

230 255 275 310 345 370 400 425 255 285 315 350 370 390 430 470 510

260 290 320 350 390 430 455 480 505 340 375 410 445 475 510 535 565 590

70 85 105 125 140 160 180 200 220 155 175 200 225 255 290 315 340 365

80

95 11 5 135 155 175 200 220 245 185 210 235 260 295 325 355 385 415

105 125 150 175 200 220 240 265 290 255 290 330 365 400 430 460 490 520

135 160 185 215 235 260 285 305 330 370 400 440 475 505 530 565 600 635

Speed Switch Positions

1

4

1

4

Page 9

BLOWER DATA

ADJUST"

Stc

Positions

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



Switch

Positions

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1450 1640 1820 2055 1575 1690 1895 2135

1

NORM 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

1

1

2 3 4 1 2 3

+ 1315 1510 1695 1875 1080 1160 1315 1490

1

NORM 1190 1365 1545 1715 985 1060 1185 1330

 1075 1205 1370 1520 865 930 1065 1185

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 449 cfm.

HEAT speed position.

G61MPV−60C−090 BLOWER MOTOR WATTS

Motor Watts @ Various External Static Pressures − in. wg.

Jumper Speed

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

COOL"

Speed

170 200 230 265 295 325 355 385 415 225 255 290 325 360 390 425 455 490

Tap 1

285 320 355 390 425 455 490 520 330 370 410 455 485 515 540 560 585

255

Tap 2

345 385 430 475 515 555 585 610 640 445 480 520 560 610 660 700 735 775

Tap 3

470 515 560 610 650 685 725 765 800 650 695 745 800 840 885 915 950 980

Tap 4

110 130 155 180 205 225 245 270 290 285 320 355 390 430 465 500 535 565

Tap 1

125

Tap 2

Tap 3

Tap 4

150 175 205 225 250 275 300 325 355 390 430 470 500 530 570 605 645

170 195 230 260 290 325 355 385 415 515 550 590 625 670 710 750 795 840

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

COOL"

Speed

145 165 190 215 240 265 290 315 345 175 200 235 265 300 330 360 385 415

Tap 1

195

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

225 255 290 320 345 375 405 435 260 290 325 355 390 425 455 490 520

265 300 335 370 405 435 470 505 540 360 395 435 470 515 555 585 620 650

385

420 460 495 525 555 590 625 660 475 515 560 600 640 685 720 760 800

85 100 125 145 170 200 215 235 255 200 230 270 310 340 370 400 430 460

105

125 150 170 195 220 240 260 280 260 295 330 365 400 440 470 500 530

135 160 185 215 240 270 290 315 335 410 440 470 500 540 580 610 640 670

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

COOL"

Speed

105 130 155 180 205 225 245 270 290 130 155 180 204 230 260 285 310 335

Tap 1

145

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

165 195 220 250 280 305 335 360 170 195 230 265 295 325 355 385 420

190 220 250 285 315 345 375 405 440 245 280 315 350 385 420 450 485 520

295 325 355 395 430 465 500 530 340 375 415 455 490 525 560 595 625

270

65 80 100 120 140 160 180 205 225 155 180 215 245 265 290 320 345 375

75

90 11 0 130 155 180 200 220 245 190 220 250 275 305 335 370 400 430

100 120 150 175 200 220 245 265 290 290 320 355 385 415 445 485 520 560

135 160 185 215 240 265 290 315 335 405 435 465 495 540 585 610 640 665

Speed Switch Positions

1

4

1

4

Page 10

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−60C−091 BLOWER PERFORMANCE (less filter)
Bottom Return Air, Return Air from Both Sides or Return Air from Bottom and One Side.
0 through 1.00 in. w.g. External Static Pressure Range



Switch

Positions

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

2 3 4 1 2 3

1

+ 1560 1770 1895 2110 1665 1790 1990 2175

1

NORM 1400 1575 1745 1930 1515 1625 1815 2020

 1245 1400 1565 1745 1340 1445 1645 1800

ADJUST"

Switch

Positions

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1420 1625 1780 1965 1240 1245 1410 1585

1

NORM 1280 1465 1615 1790 1060 1125 1270 1430

 1145 1290 1445 1610 940 1015 1145 1270

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 458 cfm.

HEAT speed position.

G61MPV−60C−091 BLOWER MOTOR WATTS

Motor Watts @ Various External Static Pressures − in. wg.

Jumper Speed

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

+" (Plus) SETTING (Adjust" Jumper at +" Setting)

HEAT"

Tap 1 255 280 305 330 355 390 420 450 475 305 340 375 415 450 475 505 530 560

Speed

Tap 2 325

360 390 425 460 500 540 580 615 395 440 490 540 585 620 655 690 730

Tap 3 495 525 555 590 620 650 680 710 710 615 645 675 705 740 755 775 790 765

Tap 4 625 660 700 740 780 815 855 890 890 800 840 880 920 960 985 1005 1030 1000

COOL"

Tap 1 180 200 225 250 280 300 320 345 370 390 420 455 485 520 550 585 615 640

Speed

Tap 2 200

225 250 280 305 330 350 375 395 485 520 555 590 625 655 680 710 735

Tap 3 245 270 300 335 365 390 420 445 470 655 700 740 785 830 860 890 925 930

Tap 4 355 380 405 435 465 495 520 550 585 930 960 990 1020 1050 1060 1070 1045 1005

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)

HEAT"

Tap 1 185 210 235 265 290 315 340 365 390 230 260 290 320 350 375 405 430 460

Speed

Tap 2 240

270 305 340 375 410 445 475 505 300 335 370 410 450 485 520 560 595

Tap 3 385 410 435 455 480 510 540 656 595 465 495 530 565 595 625 650 680 690

Tap 4 480 510 540 570 600 605 670 705 740 585 626 670 710 750 785 820 855 870

COOL"

Tap 1 110 130 155 180 205 230 250 275 295 285 315 350 380 415 440 465 490 525

Speed

Tap 2 140

160 185 205 230 250 265 285 310 345 380 420 460 495 525 550 580 615

Tap 3 185 210 235 265 290 320 350 380 395 485 525 565 610 650 680 715 745 775

Tap 4 245 275 305 335 365 395 420 450 480 680 720 765 810 855 885 910 940 960

−" (Minus) SETTING (Adjust" Jumper at −" Setting)

HEAT"

Tap 1 145 165 190 210 235 255 280 300 320 175 195 225 250 275 295 320 340 365

Speed

Tap 2 175

200 225 255 280 305 335 360 385 220 250 280 315 350 375 400 430 460

Tap 3 275 305 330 360 385 410 435 460 485 365 390 410 435 460 485 510 535 555

Tap 4 340 370 405 440 475 505 535 570 600 460 490 520 550 580 610 640 675 700

COOL"

Tap 1 90 105 125 145 165 185 205 225 245 215 240 270 300 325 350 375 395 425

Speed

Tap 2 105

125 150 170 195 215 235 255 270 255 285 315 345 380 405 430 455 495

Tap 3 145 165 190 215 235 260 280 305 325 385 410 440 470 495 535 570 605 630

Tap 4 190 215 240 265 290 315 345 370 395 485 520 555 590 625 660 700 735 765

Speed Switch Positions

1

4

1

4

Page 11

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−60C−091 BLOWER PERFORMANCE (less filter)
Side Return Air with Optional RAB Return Air Base
0 through 1.00 in. w.g. External Static Pressure Range



Switch

Positions

1

ADJUST"

Switch

Positions

1

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 458 cfm.

G61MPV−60C−091 BLOWER MOTOR WATTS

Jumper Speed

+" (Plus) SETTING (Adjust" Jumper at +" Setting)

HEAT"

Speed

Tap 1 210 235 265 295 325 350 380 405 435 265 295 330 365 400 425 450 480 500

Tap 2 270

Tap 3 430 455 490 520 550 580 610 645 675 530 656 600 640 675 700 730 755 775

Tap 4 525 560 600 635 675 710 750 790 825 680 725 775 820 870 905 935 970 995

COOL"

Speed

Tap 1 145 165 185 210 230 255 275 295 315 353 380 410 440 470 500 530 555 580

Tap 2 175

Tap 3 230 260 285 315 345 370 395 420 450 640 680 725 765 810 840 870 905 890

Tap 4 335 365 390 415 445 470 500 525 560 855 885 915 940 970 970 965 965 935

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)

HEAT"

Speed

Tap 1 160 185 210 235 260 280 305 325 355 195 225 255 285 320 345 365 390 420

Tap 2 205

Tap 3 325 350 375 400 430 455 475 500 530 415 445 475 505 540 570 605 635 665

Tap 4 410 445 475 510 545 575 605 640 670 505 545 585 625 660 700 740 780 815

COOL"

Speed

Tap 1 105 125 150 170 195 220 240 261 280 260 285 315 345 375 400 420 445 475

Tap 2 135

Tap 3 175 200 225 250 275 305 330 360 375 475 515 555 595 635 665 695 730 760

Tap 4 235 260 290 320 350 375 405 430 460 625 665 705 750 790 815 840 865 855

−" (Minus) SETTING (Adjust" Jumper at −" Setting)

HEAT"

Speed

Tap 1 120 140 165 190 215 235 260 285 305 150 170 195 220 245 270 295 320 345

Tap 2 145

Tap 3 230 255 285 315 345 370 395 420 445 310 335 365 390 415 445 470 495 520

Tap 4 280 315 350 385 420 450 480 515 540 385 415 445 480 515 545 580 610 640

COOL"

Speed

Tap 1 85 100 120 140 160 180 195 215 235 195 220 245 270 295 315 335 360 385

Tap 2 100

Tap 3 140 155 180 200 225 245 265 285 305 375 400 430 455 485 520 555 590 620

Tap 4 180 205 230 255 280 305 330 355 380 450 480 515 545 580 610 645 675 705

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

2 3 4 1 2 3

1

+ 1490 1690 1850 2050 1590 1695 1905 2035

NORM 1345 1520 1700 1870 1445 1535 1740 1900

 1195 1345 1525 1675 1280 1370 1580 1700

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1360 1550 1720 1880 1125 1195 1370 1530

NORM 1225 1400 1540 1715 1030 1085 1230 1380

 1100 1225 1385 1540 915 980 1110 1225

HEAT speed position.

Motor Watts @ Various External Static Pressures − in. wg.

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

300 340 380 415 450 485 520 555 355 395 445 490 535 570 610 645 675

195 220 245 270 290 315 335 360 445 475 510 540 575 600 625 650 675

235 265 295 330 355 385 415 450 250 285 325 365 405 435 465 495 530

155 180 200 225 240 260 275 300 320 350 385 420 455 480 505 530 565

170 200 225 255 285 315 345 370 185 210 240 270 305 330 360 390 425

120 145 165 190 210 230 250 265 235 260 290 320 345 370 395 420 455

Speed Switch Positions

1

4

1

4

Page 12

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−60C−091 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 1.00 in. w.g. External Static Pressure Range



Switch

Positions

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1510 1720 1810 2065 1615 1735 1900 2055

1

NORM 1365 1535 1725 1880 1465 1575 1735 1915

 1210 1360 1520 1700 1300 1400 1575 1715

ADJUST"

Switch

Positions

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1385 1560 1755 1900 1150 1220 1385 1545

1

NORM 1240 1400 1570 1750 1050 1105 1245 1395

 1125 1260 1410 1560 930 995 1125 1240

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 458 cfm.

HEAT speed position.

G61MPV−60C−091 BLOWER MOTOR WATTS

Motor Watts @ Various External Static Pressures − in. wg.

Jumper Speed

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

+" (Plus) SETTING (Adjust" Jumper at +" Setting)

HEAT"

Speed

Tap 1 230 255 285 315 350 375 400 425 455 285 315 350 385 420 450 485 515 545

Tap 2 290

325 365 405 445 480 510 545 585 370 410 455 500 545 585 625 670 705

Tap 3 475 505 545 580 620 645 670 695 695 560 595 625 660 695 720 745 770 755

Tap 4 570 610 655 700 740 775 805 835 835 750 790 835 880 925 960 995 1025 1010

COOL"

Speed

Tap 1 155 175 200 225 250 275 295 320 345 385 415 450 485 515 545 580 610 635

Tap 2 175

200 225 250 275 300 320 340 370 470 500 535 570 600 630 655 685 710

Tap 3 240 265 295 325 355 385 410 435 465 645 685 730 770 815 845 875 905 890

Tap 4 355 380 410 440 465 495 525 555 590 905 935 965 995 1025 1025 1020 1020 985

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)

HEAT"

Speed

Tap 1 160 190 220 250 280 305 325 350 375 215 240 270 300 330 360 390 415 445

Tap 2 205

235 275 315 350 380 415 445 475 270 305 345 385 420 455 495 530 565

Tap 3 360 385 415 440 465 490 515 540 570 450 480 515 545 580 605 630 660 690

Tap 4 455 485 520 550 585 615 650 680 715 555 590 630 675 715 745 780 810 850

COOL"

Speed

Tap 1 115 135 160 185 210 235 260 280 300 285 315 345 380 410 435 460 485 520

Tap 2 135

160 180 205 230 245 265 280 305 335 365 405 440 480 505 530 560 595

Tap 3 180 205 230 260 285 315 345 370 390 475 515 555 595 640 670 700 730 760

Tap 4 245 275 305 335 370 395 425 450 485 660 705 750 790 835 865 890 915 905

−" (Minus) SETTING (Adjust" Jumper at −" Setting)

HEAT"

Speed

Tap 1 135 155 175 200 225 250 275 300 320 160 185 205 230 255 280 310 335 360

Tap 2 160

185 215 240 270 300 335 365 390 200 225 255 285 310 345 380 415 445

Tap 3 270 295 320 345 375 400 420 445 475 330 355 385 410 435 460 485 510 535

Tap 4 325 355 385 420 450 480 510 535 575 420 450 485 515 550 580 610 640 670

COOL"

Speed

Tap 1 90 11 0 130 150 170 195 215 235 250 215 240 270 295 325 345 370 390 420

Tap 2 105

125 145 170 195 215 235 255 270 245 275 305 335 365 390 415 440 475

Tap 3 145 165 185 210 235 255 275 300 320 375 400 430 460 490 525 560 595 620

Tap 4 190 215 240 265 290 320 345 375 400 475 510 545 575 610 645 680 715 745

Speed Switch Positions

1

4

1

4

Page 13

BLOWER DATA

ADJUST"

Stc

Jumper

Speed

G61MPV−60C−110 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



Switch

Positions

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1505 1710 1915 2130 1625 1745 1990 2210

1

NORM 1370 1565 1765 1945 1465 1580 1790 1995

 1205 1380 1565 1740 1290 1405 1605 1790

ADJUST"

Switch

Positions

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1370 1570 1760 1945 1150 1215 1380 1540

1

NORM 1235 1420 1600 1780 1050 1125 1265 1430

 1105 1250 1420 1580 935 1000 1140 1255

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 463 cfm.

HEAT speed position.

G61MPV−60C−110 BLOWER MOTOR WATTS

Motor Watts @ Various External Static Pressures − in. wg.

Speed

Positions

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

0

First Stage

+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

COOL"

Speed

165 195 230 265 300 336 370 400 430 210 245 290 330 365 395 435 470 510

Tap 1

285 325 370 400 435 470 505 540 330 365 405 445 480 520 560 600 640

245

Tap 2

395 430 465 510 550 590 630 670 450 490 535 580 625 665 700 735 770

365

Tap 3

520 565 610 645 685 725 770 810 625 670 715 760 805 850 890 930 970

480

Tap 4

110 130 160 185 210 230 255 280 305 280 315 350 390 430 475 510 550 585

Tap 1

155 180 210 230 255 285 315 350 340 380 425 465 505 545 575 610 645

135

Tap 2

180 210 250 285 310 340 370 400 425 510 545 585 620 675 735 770 805 840

Tap 3

235 270 310 350 380 420 450 480 515 710 755 805 855 905 950 980 1010 1035

Tap 4

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

COOL"

Speed

150 170 190 205 245 280 305 335 365 170 200 235 270 300 330 365 400 430

Tap 1

195

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

220 255 285 320 360 390 420 445 240 275 320 365 400 430 465 500 530

265

300 335 370 410 445 480 520 555 360 395 435 475 510 550 585 620 650

370

410 455 495 525 550 590 630 670 460 500 545 590 635 675 720 760 805

100 115 135 150 180 210 235 255 275 205 235 275 310 345 380 415 450 485

110

130 150 175 200 235 260 280 300 250 285 325 360 400 440 470 505 540

155 180 200 225 250 280 310 340 370 375 410 445 485 530 575 605 635 670

190

220 255 290 320 350 380 410 440 510 550 595 640 685 725 770 815 860

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

COOL"

Speed

105 130 155 180 210 235 260 285 305 140 160 180 200 235 265 295 320 350

Tap 1

140

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

165 195 225 250 280 310 345 375 165 195 230 265 300 335 370 405 440

185 220 255 290 325 355 390 420 450 250 285 325 360 395 430 465 500 530

250 290 335 375 410 445 480 520 560 340 375 420 460 495 530 565 605 645

70 90 11 0 130 150 175 200 220 240 155 180 210 240 270 295 325 355 385

80

100 120 145 170 200 220 240 260 185 215 245 280 315 345 380 415 450

110 130 155 180 205 235 260 280 310 265 300 345 385 425 465 500 535 570

160 180 200 225 250 275 300 330 360 375 415 455 495 535 575 615 650 690

Speed Switch Positions

Second Stage

1

4

1

4

Page 14

BLOWER DATA

ADJUST"

Stc

Jumpe

Jumper

Speed

G61MPV−60C−110 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



Switch

Positions

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1485 1675 1870 2080 1585 1700 1905 2135

1

NORM 1350 1525 1725 1895 1435 1535 1740 1930

 1175 1335 1505 1670 1280 1385 1570 1755

ADJUST"

Switch

Positions

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1325 1505 1695 1870 1140 1215 1345 1490

1

NORM 1195 1365 1550 1720 1005 1085 1220 1380

 1080 1205 1365 1530 930 1000 1105 1220

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 463 cfm.

HEAT speed position.

G61MPV−60C−110 BLOWER MOTOR WATTS

Motor Watts @ Various External Static Pressures − in. wg.

First Stage Second Stage

Speed

Positions

r

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

0
+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

COOL"

Speed

155 185 220 255 285 320 350 380 410 205 240 280 320 355 390 420 450 480

Tap 1

215

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

255 300 345 370 395 430 465 500 320 350 380 410 455 495 530 565 595

335 375 415 455 490 530 570 605 645 445 475 510 545 590 630 670 710 750

450 490 535 580 615 645 690 730 775 580 625 680 735 770 810 850 890 930

105 130 160 190 210 230 260 280 310 255 295 345 390 430 470 510 545 580

125

150 175 200 225 250 280 310 335 340 375 415 455 490 525 570 615 660

170 195 230 265 295 325 355 380 410 455 500 555 610 650 695 750 800 850

215 250 295 340 375 405 440 470 500 650 710 770 835 880 920 960 995 1035

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

COOL"

Speed

140 160 185 210 235 265 285 310 330 155 185 220 250 285 320 350 380 410

Tap 1

170

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

200 235 270 305 340 370 400 430 220 260 300 345 370 395 430 465 500

250 290 330 370 400 430 465 505 540 355 385 415 450 485 520 555 595 630

395 430 465 510 550 580 605 635 460 490 525 560 605 645 685 730 770

360

80 100 120 145 170 195 220 245 275 195 230 270 305 345 380 415 455 490

95

115 140 165 190 220 240 270 295 225 265 315 360 400 440 475 515 555

140 160 190 215 240 265 295 320 350 365 400 445 485 525 565 610 650 690

175 205 240 270 305 340 370 400 430 495 535 580 625 675 725 770 815 860

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

COOL"

Speed

105 125 150 175 195 215 240 265 290 135 155 180 205 225 245 275 300 330

Tap 1

145

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

165 190 210 240 265 290 315 340 170 195 225 255 290 325 355 385 410

175 200 235 265 300 335 370 400 430 230 260 295 335 370 405 440 475 510

240 275 320 360 390 420 450 485 515 325 365 410 455 490 520 550 575 600

60 80 100 125 150 170 195 220 245 155 180 205 235 270 305 340 370 400

75

95 11 5 140 160 185 210 235 260 170 200 240 275 315 355 390 420 450

105

125 150 175 200 225 250 275 295 250 290 330 375 410 445 485 525 570

140 160 190 215 240 265 300 330 360 365 405 450 490 535 575 615 655 690

Speed Switch Positions

1

4

1

4

Page 15

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−60C−110 BLOWER PERFORMANCE (less filter)
Side Return Air with Optional RAB Return Air Base
0 through 0.80 in. w.g. External Static Pressure Range



Switch

Positions

1

ADJUST"

Switch

Positions

1

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 463 cfm.

G61MPV−60C−110 BLOWER MOTOR WATTS

Jumper Speed

+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

2 3 4 1 2 3

1

+ 1475 1670 1865 2070 1555 1685 1895 2130

NORM 1345 1500 1695 1865 1415 1540 1735 1930

 1180 1345 1510 1685 1245 1350 1545 1725

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1330 1510 1695 1875 1085 1155 1310 1475

NORM 1195 1375 1550 1725 955 1050 1185 1335

 1080 1210 1370 1520 850 920 1070 1195

HEAT speed position.

Motor Watts @ Various External Static Pressures − in. wg.

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

170 195 225 255 290 320 350 380 410 215 250 285 320 355 390 425 455 490

230

265 305 345 380 415 445 480 515 315 355 400 445 480 510 540 575 605

350 385 420 460 495 525 560 595 630 460 490 525 555 605 655 690 730 770

450 490 535 580 610 640 680 720 760 590 630 680 725 785 840 880 915 955

105 125 150 175 200 220 245 265 290 250 285 320 360 395 435 470 500 535

130

150 175 200 220 240 270 295 320 335 365 405 445 480 515 550 590 630

165 190 220 250 275 305 335 370 400 470 505 545 585 630 670 710 755 800

205 240 285 330 360 390 420 450 485 655 695 745 790 840 885 925 965 1005

150 170 190 215 240 265 290 315 340 155 190 225 265 295 325 355 385 420

185

215 245 275 310 340 370 400 430 230 265 300 335 370 400 440 475 515

255 285 325 365 400 440 465 495 525 335 370 410 450 490 530 560 595 625

345 385 430 475 510 545 575 605 635 460 490 520 550 595 645 680 715 750

75 90 11 5 135 160 185 205 225 250 190 220 255 290 325 360 395 430 460

100

120 145 165 185 205 230 255 280 250 285 325 360 390 420 455 485 520

135

155 175 200 230 260 280 305 330 355 395 435 475 510 545 580 620 660

195 225 255 290 320 350 375 405 475 515 565 610 655 705 745 785 825

170

110 130 150 175 195 215 240 265 290 135 155 180 210 230 250 275 300 325

145

165 190 210 240 270 295 315 340 170 195 230 265 295 325 355 390 420

175

205 240 280 310 340 370 400 430 220 255 295 335 370 405 440 475 515

245 280 320 355 390 420 455 490 525 325 360 400 440 475 510 540 565 590

55 70 90 110 135 155 175 195 220 150 170 200 225 255 285 315 340 370

65

80 105 130 150 170 195 215 240 165 195 230 265 300 330 360 390 420

100 125 150 180 200 220 240 260 280 240 280 320 360 400 435 470 505 540

140 160 180 200 230 260 285 305 330 350 385 420 455 500 540 575 610 645

Speed Switch Positions

1

4

1

4

Page 16

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−60C−111 BLOWER PERFORMANCE (less filter)
Bottom Return Air, Return Air from Both Sides or Return Air from Bottom and One Side.
0 through 1.00 in. w.g. External Static Pressure Range



Switch

Positions

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

2 3 4 1 2 3

1

+ 1585 1810 1950 2170 1635 1750 1965 2195

1

NORM 1430 1635 1770 1970 1480 1605 1805 2015

 1265 1440 1600 1780 1290 1400 1605 1800

ADJUST"

Switch

Positions

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1450 1650 1790 1990 1120 1195 1380 1560

1

NORM 1295 1475 1630 1810 1020 1095 1225 1385

 1165 1330 1470 1635 900 970 1105 1245

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 458 cfm.

HEAT speed position.

G61MPV−60C−111 BLOWER MOTOR WATTS

Motor Watts @ Various External Static Pressures − in. wg.

Jumper Speed

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

Tap 1 210 235 270 300 335 365 395 425 455 275 305 345 380 415 445 475 505 535

Tap 2 265

305 345 385 425 465 505 545 585 350 395 440 485 530 570 605 645 685

Tap 3 425 460 490 525 560 590 615 645 675 575 605 640 670 700 730 765 795 800

Tap 4 540 580 625 665 710 745 780 815 850 730 770 805 845 885 925 965 1005 1015

COOL"

Speed

Tap 1 120 140 165 190 215 235 260 285 305 325 355 390 425 460 490 520 550 580

Tap 2 145

165 190 215 235 260 290 315 340 390 425 465 500 540 570 600 630 660

Tap 3 190 220 250 285 320 345 375 400 425 545 585 630 670 715 755 790 830 865

Tap 4 275 305 340 375 410 440 470 505 535 775 815 860 900 945 975 1010 1040 1060

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

Tap 1 160 185 215 245 270 295 320 345 370 200 225 260 290 325 355 385 415 445

Tap 2 205

235 275 310 350 380 410 445 475 255 290 330 375 415 455 490 530 570

Tap 3 325 350 380 410 440 470 500 530 550 425 455 490 520 555 580 610 635 665

Tap 4 410 445 480 520 555 595 630 670 700 540 575 620 660 700 735 770 805 840

COOL"

Speed

Tap 1 90 11 0 135 160 185 200 220 235 260 225 255 290 325 360 390 425 455 485

Tap 2 105

130 155 180 205 230 250 270 290 295 325 360 395 430 465 495 525 560

Tap 3 145 165 195 220 250 275 295 320 350 435 465 505 540 575 605 635 665 700

Tap 4 190 220 250 280 315 345 370 400 430 590 625 665 705 745 790 830 875 905

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

Tap 1 120 140 165 195 220 240 265 290 310 150 175 200 225 250 275 305 330 355

Tap 2 155

180 215 245 280 310 340 370 395 195 220 255 285 315 355 390 425 455

Tap 3 240 265 290 320 345 370 395 420 445 315 340 370 395 425 450 475 500 525

Tap 4 305 335 370 405 440 470 500 535 565 400 430 465 500 535 570 600 630 665

COOL"

Speed

Tap 1 75 90 11 0 130 150 170 190 215 230 165 190 220 245 275 305 330 360 390

Tap 2 85

105 125 145 165 190 210 230 255 200 230 260 295 325 355 385 415 445

Tap 3 115 135 160 185 205 230 250 270 295 305 335 370 405 440 470 505 540 570

Tap 4 155 175 205 230 260 285 310 335 360 425 460 495 530 570 595 625 655 690

Speed Switch Positions

1

4

1

4

Page 17

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−60C−111 BLOWER PERFORMANCE (less filter)
Side Return Air with Optional RAB Return Air Base
0 through 1.00 in. w.g. External Static Pressure Range



Switch

Positions

1

ADJUST"

Switch

Positions

1

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 458 cfm.

G61MPV−60C−111 BLOWER MOTOR WATTS

Jumper Speed

+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

Tap 1 165 190 225 255 290 320 355 385 410 210 245 280 320 355 385 410 440 470

Tap 2 210

Tap 3 385 415 445 475 505 535 570 600 625 490 520 560 595 630 660 690 720 745

Tap 4 490 525 565 600 640 680 720 760 790 620 660 705 750 795 835 870 910 945

COOL"

Speed

Tap 1 115 130 155 180 205 225 250 270 290 310 335 365 390 415 445 470 500 525

Tap 2 145

Tap 3 180 210 240 270 300 330 355 380 405 530 570 615 655 700 735 775 810 845

Tap 4 265 295 325 360 390 420 450 480 510 715 750 795 835 875 900 930 960 960

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

Tap 1 140 160 185 205 230 255 285 310 340 155 185 215 250 280 310 340 365 395

Tap 2 175

Tap 3 295 320 350 380 405 430 455 485 505 360 390 425 460 490 520 550 585 610

Tap 4 375 405 445 480 515 545 580 610 640 460 495 540 580 620 660 700 740 770

COOL"

Speed

Tap 1 85 105 130 150 175 190 210 225 250 200 230 260 295 325 355 385 410 440

Tap 2 105

Tap 3 135 160 185 210 235 260 280 305 330 425 455 490 525 560 590 620 650 685

Tap 4 180 210 240 270 300 330 355 385 415 545 580 615 651 690 730 770 810 835

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

Tap 1 105 125 150 170 195 220 240 265 285 135 155 175 200 225 250 275 300 325

Tap 2 135

Tap 3 210 230 255 280 305 335 365 395 420 275 300 325 350 375 400 430 455 485

Tap 4 265 295 325 355 390 425 465 500 530 350 380 410 440 475 510 545 580 610

COOL"

Speed

Tap 1 70 85 105 120 140 160 180 205 220 150 170 195 220 250 275 300 325 350

Tap 2 85

Tap 3 110 130 150 175 195 215 235 255 280 300 330 360 395 430 460 495 530 560

Tap 4 145 170 195 220 245 270 295 320 345 395 425 455 490 525 550 580 605 635

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

2 3 4 1 2 3

1

+ 1490 1695 1875 2080 1565 1655 1890 2060

NORM 1345 1530 1700 1890 1410 1515 1730 1900

 1210 1380 1530 1700 1230 1325 1545 1695

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1365 1555 1730 1925 1090 1155 1335 1505

NORM 1235 1410 1575 1750 995 1060 1190 1335

 1115 1270 1410 1565 875 935 1070 1200

HEAT speed position.

Motor Watts @ Various External Static Pressures − in. wg.

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

245 285 330 370 410 450 490 525 270 310 360 405 455 490 525 560 600

160 185 210 230 255 280 305 330 360 390 425 460 495 525 550 580 605

205 235 265 295 330 360 395 435 200 235 275 320 360 395 435 470 505

125 150 175 200 220 240 265 285 270 300 330 365 395 425 455 485 515

160 190 220 250 280 310 340 365 170 195 226 255 285 320 350 385 420

100 120 140 160 185 205 225 245 195 220 245 270 300 325 355 380 410

Speed Switch Positions

1

4

1

4

Page 18

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−60C−111 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 1.00 in. w.g. External Static Pressure Range



Switch

Positions

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1525 1740 1905 2115 1585 1695 1880 2080

1

NORM 1370 1560 1720 1915 1430 1555 1725 1915

 1225 1395 1555 1730 1250 1355 1540 1710

ADJUST"

Switch

Positions

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1395 1590 1730 1920 111 0 1175 1355 1520

1

NORM 1255 1430 1590 1765 1010 1075 1200 1350

 1130 1285 1430 1590 895 955 1085 1215

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 458 cfm.

HEAT speed position.

G61MPV−60C−111 BLOWER MOTOR WATTS

Motor Watts @ Various External Static Pressures − in. wg.

Jumper Speed

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

Tap 1 190 220 250 280 310 345 375 410 430 260 290 320 350 380 415 445 480 510

Tap 2 245

280 320 360 400 440 480 520 555 335 370 410 445 485 530 570 615 650

Tap 3 390 425 460 495 530 560 590 615 650 540 580 615 655 695 725 755 785 805

Tap 4 490 535 580 630 675 710 745 780 820 685 730 780 830 880 920 960 995 1015

COOL"

Speed

Tap 1 120 145 170 195 220 245 270 295 315 315 350 385 420 455 485 515 545 575

Tap 2 145

165 190 210 235 260 285 310 340 375 410 445 485 520 550 580 610 635

Tap 3 185 215 250 280 315 340 370 395 420 535 575 615 660 700 740 775 815 845

Tap 4 280 310 345 375 410 445 475 505 535 755 795 840 880 925 955 985 1015 1015

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

Tap 1 155 175 200 230 255 275 300 320 350 180 205 240 270 300 330 360 390 420

Tap 2 200

225 260 290 325 355 385 410 450 230 265 305 345 385 425 460 500 535

Tap 3 315 340 375 405 440 460 485 510 535 390 425 460 495 530 560 590 615 645

Tap 4 395 435 475 515 555 585 615 645 675 495 535 580 625 670 705 745 780 815

COOL"

Speed

Tap 1 95 11 5 140 165 190 205 225 245 270 220 250 285 320 360 390 420 450 480

Tap 2 105

130 155 180 205 225 250 270 290 285 315 350 380 415 445 475 505 540

Tap 3 140 165 190 220 245 270 290 315 345 425 460 495 530 565 595 625 655 690

Tap 4 190 220 250 285 315 345 375 405 435 575 610 650 690 725 770 810 855 885

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

Tap 1 115 135 160 185 210 230 250 270 300 145 165 190 215 235 265 290 315 345

Tap 2 150

175 205 235 265 295 320 250 385 185 210 245 275 305 335 370 405 440

Tap 3 235 260 285 310 335 360 380 405 435 295 325 350 380 410 440 470 495 515

Tap 4 300 330 360 390 420 455 485 515 550 375 410 445 485 520 555 590 630 655

COOL"

Speed

Tap 1 75 90 110 130 150 175 195 220 235 165 185 215 245 275 300 330 355 385

Tap 2 85

100 125 145 165 185 210 230 250 195 225 255 285 315 340 370 400 430

Tap 3 115 135 155 180 205 225 245 265 290 300 330 365 395 430 465 495 530 560

Tap 4 155 180 205 235 260 285 310 340 365 415 450 485 520 555 585 610 640 675

Speed Switch Positions

1

4

1

4

Page 19

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−60D−135 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



Switch

Positions

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

2 3 4 1 2 3

1

+ 1505 1705 1900 2110 1615 1730 1945 2190

1

NORM 1365 1550 1740 1920 1455 1580 1780 1985

 1225 1380 1545 1720 1305 1400 1600 1780

ADJUST"

Switch

Positions

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1385 1570 1760 1930 1135 1205 1365 1540

1

NORM 1250 1425 1595 1775 1025 1105 1235 1390

 1135 1265 1430 1585 915 985 1115 1235

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 470 cfm.

HEAT speed position.

G61MPV−60D−135 BLOWER MOTOR WATTS

Motor Watts @ Various External Static Pressures − in. wg.

Jumper Speed

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

COOL"

Speed

155 185 220 255 285 315 340 365 390 215 225 265 305 335 365 400 435 465

Tap 1

215

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

250 285 325 360 390 425 455 490 275 315 360 400 440 475 505 540 575

315 350 390 430 460 490 530 565 605 405 440 475 515 550 585 630 670 715

435 465 500 530 575 615 655 695 735 530 575 620 670 725 780 825 870 915

95 120 145 170 190 215 240 265 290 250 285 320 360 390 420 450 485 515

115

135 160 185 210 235 260 290 315 290 330 375 420 455 490 525 565 605

145 175 215 250 275 300 330 355 385 425 465 505 550 590 635 670 710 750

205 240 280 320 350 380 410 445 480 615 655 700 745 800 855 900 940 980

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

COOL"

Speed

130 155 180 205 235 260 285 305 330 155 180 210 245 270 300 330 355 385

Tap 1

165

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

195 230 265 300 330 360 385 415 215 250 295 335 360 385 420 455 490

240 270 310 345 380 415 440 470 500 305 340 380 420 455 490 520 545 575

335 365 405 440 480 515 550 585 620 405 445 485 530 570 610 650 690 735

80 95 11 5 135 160 190 210 230 255 185 215 245 280 310 335 370 400 430

90

115 140 165 190 215 230 250 265 230 260 295 335 370 405 435 470 500

130

150 170 195 225 255 275 300 320 315 355 400 445 480 515 555 590 625

180 220 255 285 315 345 375 405 445 485 530 580 625 670 705 740 775

150

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

COOL"

Speed

100 120 140 165 190 215 240 265 290 125 150 175 200 225 245 270 295 320

Tap 1

130

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

155 180 210 235 265 285 310 330 155 185 215 250 280 305 335 365 395

170

200 235 270 300 330 360 390 420 220 250 280 315 350 390 425 460 490

225 260 300 335 375 410 435 465 490 295 325 360 395 435 470 505 545 580

65 80 100 120 140 160 180 195 215 145 170 195 225 250 280 305 330 355

70

90 11 0 130 155 175 200 220 240 160 190 225 255 285 315 345 380 415

95 120 145 170 190 215 235 250 270 245 280 315 355 385 415 445 480 515

135 155 175 200 220 245 270 300 325 325 365 405 445 485 520 550 580 610

Speed Switch Positions

1

4

1

4

Page 20

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−60D−135 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



Switch

Positions

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1470 1650 1845 2040 1585 1705 1905 2130

1

NORM 1325 1495 1680 1865 1430 1545 1765 1975

 N/A 1335 1505 1670 1275 1370 1565 1755

ADJUST"

Switch

Positions

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1335 1510 1695 1870 1105 1180 1330 1500

1

NORM 1210 1370 1540 1710 990 1075 1210 1355

 N/A 1225 1375 1515 890 950 1085 1210

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 470 cfm.

G61MPV−60D−135 BLOWER MOTOR WATTS

Motor Watts @ Various External Static Pressures − in. wg.

Jumper Speed

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

COOL"

Speed

150 175 210 240 270 300 330 360 390 180 215 255 295 330 365 400 430 465

Tap 1

205

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

235 275 310 355 395 430 465 500 275 315 360 400 435 470 510 550 585

345 385 420 460 495 535 570 610 415 450 490 525 565 600 640 675 715

315

430 460 495 530 575 620 665 705 750 535 585 640 695 730 765 810 860 905

90 11 0 140 170 195 220 240 265 290 230 265 310 355 390 425 460 490 525

105

130 165 195 215 235 260 290 315 285 330 380 430 455 485 525 565 605

175 205 235 270 300 330 360 385 425 465 515 560 605 645 685 730 770

150

230 270 305 340 375 410 445 480 605 650 695 740 800 855 900 945 985

195

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

COOL"

Speed

120 140 170 200 225 255 280 305 330 150 175 210 240 270 300 335 365 400

Tap 1

155

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

185 220 255 295 335 365 395 425 205 240 275 315 350 385 422 460 495

235

265 300 330 370 405 440 470 500 290 330 380 430 460 485 515 545 575

320 355 390 430 465 505 540 575 610 395 440 485 530 575 620 660 700 740

70 90 11 5 135 165 190 210 230 245 170 200 235 265 305 345 380 420 455

80

100 130 160 185 210 230 255 275 245 270 305 335 370 410 440 470 505

120 140 170 195 225 255 280 305 330 350 385 420 455 495 530 570 610 645

145

175 215 250 280 315 345 375 410 455 500 555 605 645 680 725 770 810

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

COOL"

Speed

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 1

125

Tap 2

Tap 3

Tap 4

Tap 1

Tap 2

Tap 3

Tap 4

150 175 195 230 265 290 310 335 150 175 210 240 255 290 330 370 405

155 185 215 250 285 320 355 385 420 205 235 270 305 345 380 420 455 490

205

240 285 325 355 385 420 460 495 290 325 360 400 440 480 515 545 580

60 75 95 115 135 150 175 195 220 140 160 185 205 240 280 305 335 360

60

75 100 125 150 175 195 215 235 145 180 215 250 290 325 355 385 420

90 11 0 140 165 190 215 235 255 270 230 265 305 345 380 420 450 480 510

120 140 170 195 225 255 275 300 325 330 365 405 445 485 525 560 595 635

Speed Switch Positions

HEAT speed position.

1

4

1

4

Page 21

BLOWER DATA

ADJUST"

Stc

Positions

G61MPV−60D−135 BLOWER PERFORMANCE (less filter)
Side Return Air with Optional RAB Return Air Base
0 through 0.80 in. w.g. External Static Pressure Range



Switch

Positions

1

ADJUST"

Switch

Positions

1

1

Factory 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
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 IIIt Zone Control Applications − Minimum blower speed is 470 cfm.

G61MPV−60D−135 BLOWER MOTOR WATTS

Jumper Speed

+" (Plus) SETTING (Adjust" Jumper at +" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

NORM" (Normal) SETTING (Adjust" Jumper at NORM" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

−" (Minus) SETTING (Adjust" Jumper at −" Setting)
HEAT"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

COOL"

Speed

Tap 1

Tap 2

Tap 3

Tap 4

"

Second Stage HEAT" Speed − cfm Second Stage COOL" Speed − cfm

1

2 3 4 1 2 3

1

+ 1445 1635 1825 2025 1550 1660 1875 2105

NORM 1305 1475 1660 1840 1400 1510 1720 1920

 N/A 1315 1480 1650 1250 1345 1530 1715

First Stage HEAT" Speed − cfm First Stage COOL" Speed − cfm

1

1

2 3 4 1 2 3

+ 1315 1490 1675 1855 1080 1155 1310 1478

NORM 1195 1365 1530 1695 985 1055 1190 1325

 N/A 1210 1360 1500 875 945 1060 1190

HEAT speed position.

Motor Watts @ Various External Static Pressures − in. wg.

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

145 175 205 235 265 295 325 355 385 195 225 260 290 330 370 400 435 470

205

235 270 305 340 375 415 450 485 275 310 355 400 430 460 495 535 570

285 325 370 410 450 490 525 565 600 420 445 470 495 545 590 630 675 715

385 430 480 530 570 610 650 690 725 535 580 625 670 710 755 800 845 890

90 11 0 140 165 190 210 235 260 285 235 265 305 340 380 415 450 480 515

105

130 160 190 210 230 255 285 310 290 325 370 410 450 490 515 545 575

170 205 235 265 290 325 355 390 420 460 510 555 595 640 680 715 755

145

200 230 270 305 345 385 415 445 480 580 630 690 745 800 850 895 935 975

130 150 170 190 225 260 285 305 330 150 175 205 235 265 295 325 355 385

160

190 225 260 290 325 355 390 420 200 230 265 300 345 385 410 440 465

235

265 300 335 370 400 435 470 500 290 330 375 415 450 485 515 540 570

310 350 390 435 470 500 540 575 610 405 440 485 525 560 590 635 680 725

70 90 11 5 140 165 190 210 230 250 170 200 235 270 305 335 370 400 430

90

105 125 150 175 200 225 250 270 200 230 270 310 355 400 435 465 495

115 140 170 195 225 250 275 300 325 330 365 400 440 485 525 555 585 615

145

175 205 240 270 295 330 365 395 435 480 530 580 625 675 715 750 790

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

125

145 170 195 225 255 280 300 325 150 175 210 240 265 290 325 365 400

190 220 250 285 320 350 380 410 200 230 270 305 350 395 420 445 475

160

235 275 310 355 395 425 460 490 285 320 355 395 435 475 510 545 580

200

60 75 95 115 135 155 175 195 215 135 155 180 205 240 280 305 330 355

70

90 11 0 130 150 170 195 215 235 160 185 215 240 275 310 345 375 410

85 105 130 155 180 205 230 250 270 220 255 295 335 370 410 440 475 510

120 140 170 195 220 240 270 295 325 330 365 400 440 480 525 555 585 615

Speed Switch Positions

1

4

1

4

Page 22

BURNER BOX

ASSEMBLY

GAS VALVE

AND MANIFOLD

FLUE

COLLAR

TOP CAP

G61MPV PARTS ARRANGEMENT

DuralokPlus

HEAT EXCHANGER

ASSEMBLY

TM

CABINET

COMBUSTION

AIR PRESSURE PROVE

SWITCHES

(36B−045 has 2 single switches)

COMBUSTION AIR

INDUCER

BURNER
ACCESS

PANEL

BLOWER

ACCESS

PANEL

SIGHT

GLASS

WARM HEADER

(COLLECTOR)

BOX

CONDENSER COIL

PRIMARY LIMIT

COLD HEADER

(COLLECTOR)

BOX

SECONDARY

LIMITS (2)

DOOR

INTERLOCK

SWITCH

CONTROL BOX

FIGURE 1

Page 23

Power Choke

(5 Ton Only)

CIRCUIT BREAKER

Blower Motor

I−UNIT COMPONENTS

G61MPV unit components are shown in figure 1. The gas
valve, combustion air inducer and burners can be ac­cessed by removing the burner access panel. Electrical
components are in the control box (figure 2) found in the
blower section.
G61MPV units are factory equipped with a bottom return air

panel in place. The panel is designed to be field removed as
required for bottom air return. Markings are provided for side
return air and may be cut out in the field.

3. Circuit Breaker (CB8)

A 24V circuit breaker is also located in the control box.
The switch provides overcurrent protection to the trans­former (T1). The breaker is rated 3A at 32V. If the current
exceeds this limit the breaker will trip and all unit opera­tion will shutdown. The breaker can be manually reset
by pressing the button on the face. See figure 3.

CIRCUIT BREAKER CB8

ELECTROSTATIC DISCHARGE (ESD)

Precautions and Procedures

CAUTION

Electrostatic discharge can affect electronic
components. Take precautions during furnace
installation and service to protect the furnace’s
electronic controls. Precautions will help to avoid
control exposure to electrostatic discharge by
putting the furnace, the control and the techni­cian at the same electrostatic potential. Neutral­ize electrostatic charge by touching hand and all
tools on an unpainted unit surface, such as the
gas valve or blower deck, before performing any
service procedure.

A−Control Box

1. Control Transformer (T1)

A transformer located in the control box provides power to
the low voltage section of the unit. Transformers on all
models are rated 40VA with a 120V primary and a 24V sec­ondary.

2. Door Interlock Switch (S51)

A door interlock switch rated 14A at 125VAC is wired in se­ries with line voltage. When the blower door is removed the
unit will shut down.

CONTROL BOX G61MPV

PRESS TO RESET

FIGURE 3

WARNING

Shock hazard.
Disconnect power before servicing. Integrated

Control Board is not field repairable. If control is
inoperable, simply replace entire control.

Can cause injury or death. Unsafe operation will
result if repair is attempted.

4. Integrated Control Board (A92)
SureLight Board 49M59

G61MPV units are equipped with the Lennox two−stage,
variable speed integrated SureLight® control. The sys­tem consists of a ignition / blower control (figure 4 with
control terminal designations in tables 1 through 4) and ig­nitor (figure 12). The control and ignitor work in combina­tion to ensure furnace ignition and ignitor durability. The
SureLight integrated board controls all major furnace op­erations. The control features two LED lights, (DS1 and
DS2) for troubleshooting and four LED lights (DS3, DS6,
DS7 and DS8) to show furnace status. The control also
has two accessory terminals rated at (1) one amp each.
See table 5 for status code and table 6 for troubleshooting
diagnostic codes.

DOOR INTERLOCK

SURELIGHT®

CONTROL

BOARD

SWITCH

FIGURE 2

CIRCUIT
BREAKER

TRANSFORMER

Electronic Ignition

At the beginning of the heat cycle the SureLight control
monitors the first stage and second stage combustion air
inducer prove switch. The control will not begin the heating
cycle if the first stage or second stage prove switch is
closed (jumpered). Likewise the control will not begin the
second stage heating cycle if the second stage prove
switch is closed, and will remain in first stage heat. Howev­er, if the second stage prove switch closes during the first
stage heat pre−purge, the control will allow second stage
heat. Once the first stage prove switch is determined to be
open, the combustion air inducer is energized on low (first
stage) heat speed. When the differential in the prove switch
is great enough, the prove switch closes and a 15−second
pre−purge begins. If the switch is not proven within 2−1/2
minutes, the control goes into Watchguard−Pressure
Switch mode for a 5−minute re−set period.

Page 24

After the 15−second pre−purge period, the SureLight ignitor
warms up for 20 seconds after which the gas valve opens
for a 4−second trial for ignition. The ignitor energizes during
the trial until flame is sensed. If ignition is not proved during
the 4−second period, the control will try four more times with
an inter−purge and warm−up time between trials of 35 sec­onds. After a total of five trials for ignition (including the ini­tial trial), the control goes into Watchguard mode. After a
60−minute reset period, the control will begin the ignition
sequence again.
The SureLight control has an added feature that prolongs
the life of the ignitor. After a successful ignition, the Sur­eLight control utilizes less power to energize the ignitor on
successive calls for heat. The control continues to ramp
down the voltage to the ignitor until it finds the lowest
amount of power that will provide a successful ignition. This
amount of power is used for 255 cycles. On the 256th call
for heat, the control will again ramp down until the lowest
power is determined and the cycle begins again.

Two Stage Operation / Thermostat Selection Jumper

TWO−STAGE, VARIABLE SPEED INTEGRATED

CONTROL BOARD

DIAGNOSTIC

LEDs

DIP

SWITCHES

1 − 3

LEDs

DIP

SWITCHES

5 − 12

LED

The control can be utilized in two modes: SINGLE−STAGE
thermostat or TWO−STAGE thermostat. The thermostat
selection jumper E20, located just below dip switches 1
through 3 (figure 4), must be positioned for the particular
application. The jumper is factory set on TWO" for use
with a two−stage thermostat with two stage heat. Re−posi­tion jumper to SINGLE" for use with a single stage thermo­stat with two stage heat.
While in the single−stage thermostat mode (single jumper
setting), the burners will always fire on first−stage heat. The
combustion air inducer will operate on low speed and in­door blower will operate on low heat speed. After a 10 min­ute recognition period, the unit will switch to second stage
heat. While in the two−stage thermostat mode (two jumper
setting) the burners will fire on first−stage heat. The com­bustion air inducer will operate on low speed and indoor
blower will operate on low heat speed. The unit will switch
to second−stage heat on call from the indoor thermostat. If
there is a simultaneous call for first and second stage heat,
the unit will fire an first stage heat and switch to second
stage heat after 30 seconds of operation. See Sequence of
Operation flow charts in the back of this manual for more
detail.

ON−BOARD

JUMPER W914

(cut when SignatureStat,

CCB1 or Harmony II are

used)

ON−BOARD

JUMPER W915

(cut when two−stage

cooling is used)

JUMPER W951

(cut when heat pump is

used with FM21)

THERMOSTAT CONNECTIONS (TB1)

DIP SWITCH FUNCTIONS

DIP SWITCH(ES) FUNCTION

1 and 2 Blower Off Delay

3 Second Stage ON Delay (Single−stage t’stat)

4 Not used
5 and 6 Cooling Mode Blower Speed
7 and 8 Blower Speed Adjustment

9 and 10 Cooling Mode Blower Ramping Profile

11 and 12 Heating Mode Blower Speed

FIGURE 4

ON−BOARD

Page 25

TABLE 1

SureLight Control / Blower Control Terminals

LINE Line 120VAC Neutral

XFMR Transformer 120VAC Neutral

EAC Electronic Air Cleaner 120VAC Neutral

CIRC Indoor Blower 120VAC Neutral

HUM Humidifier 120VAC Neutral

HUM Humidifier 120VAC Hot

XMFR Transformer 120VAC Hot

LINE Line 120VAC Hot

CIRC Indoor Blower 120VAC Hot

EAC Electronic Air Cleaner 120VAC Hot

TABLE 2

SureLight Control 5 Pin Terminal Designation

PIN # Function

1 Ignitor

2 Combustion Air Inducer High Speed

3 Combustion Air Inducer Low Speed

4 Combustion Air Inducer Neutral

5 Ignitor Neutral

TABLE 3

SureLight Control 12Pin Terminal Designation

PIN # Function

1 Gas Valve High Fire

2 Second Stage Pressure Switch

3 Not Used

4 Ground

5 24V Hot

6 Primary Limit In

7 Gas Valve Low Stage

8 Gas Valve Common

9 24V Neutral

10 Ground

11 Primary Limit Out

12 1st Stage Pressure Switch

TABLE 4

SureLight Control 16 Pin Blower Control Terminals

PIN # Function

1 Ground

2 Low Heat Speed

3 Ground

4 DELAY" Dip Switch Selection

5 COOL" Dip Switch Selection

6 Y1" Signal

7 ADJUST" Dip Switch Selection

8 Ground

9 0" From Thermostat

10 DS" Output Signal

11 HEAT" Dip Switch Selection

12 24 VAC

13 HIGH HEAT Speed

14 Y2" Signal

15 G"

16 CFM LED

Page 26

TABLE 5

ONONON

Circuit board failure or control wired incorrectly. Check 24 and 115 volts to board.

STATUS CODES

STATUS LED COLOR FUNCTION

DS3

ON / OFF ’

DS6

CFM"

DS7

HI / LO"

DS8

HEAT"

GREEN

GREEN

YELLOW

YELLOW DS8−ON indicates the system is in HEAT mode.

DS3−ON indicates that the motor has a demand to operate. (This LED must be on in all
modes).

DS6−blinking indicates the airflow (CFM) demand in the motor. The air flow is determine by
counting blinks between two (2) second pauses. One blink equals approximatley 100 CFM.

DS7−ON indicaties the DS to R" jumper has not been cut. When the jumper is cut the system
will be operating with LENNOX HARMONY IIt (See Harmony Installation Instructions) or
with the CCB1 Efficiency Plus control.
CCB1: When ON, a 24 VAC is being applied and when OFF, it has been removed. This on/off
operation varies the indoor blower’s performance so dehumidification can be enhanced.

TABLE 6

DIAGNOSTIC CODES

Diagnostic LEDs are labeled DS1 and DS2. See figure 4 for location of diagnostic LEDs.

DS1 DS2 DESCRIPTION

SIMULTANEOUS

SLOW FLASH

SIMULTANEOUS

FAST FLASH

SLOW FLASH ON

OFF SLOW FLASH

OFF FAST FLASH

ALTERNATING

SLOW FLASH

SLOW FLASH OFF Flame sensed without gas valve energized.

ON ON

OFF ON

FAST FLASH SLOW FLASH Main power polarity reversed. Switch line and neutral.

SLOW FLASH FAST FLASH Low flame signal. Measures below 0.23 microAmps. Replace flame sense rod.

ALTERNATING

FAST FLASH

SIMULTANEOUS

SLOW FLASH

SIMULTANEOUS

FAST FLASH

ALTERNATING

SLOW FLASH

OFF

ALTERNATING

FAST FLASH

Power on − Normal operation.
Also signaled during cooling and continuous fan.

Normal operation − signaled when heating demand initiated at thermostat.

Primary, secondary, backup secondary or rollout limit switch open. Limits must
close within 3 minutes or unit goes into 1 hour Watchguard.
Low prove switch open;
OR: Blocked inlet/exhaust vent;
OR: Low prove switch closed prior to activation of combustion air inducer.

High prove switch open;
OR: Blocked inlet/exhaust vent;
OR: High prove switch closed prior to activation of combustion air inducer.

Watchguard −− burners failed to ignite; OR limit open more than 3 minutes;
OR lost flame sense 5 times in one heating cycle;
OR pressure switch opened 5 times in one heating cycle.

Circuit board failure or control wired incorrectly. Check 24 and 115 volts to board.

The following conditions are sensed during the ignitor warm−up period only:

1) Improper main ground;

2) Broken ignitor; OR: Open ignitor circuit;

3) Line voltage below 75 volts.
(If voltage lower than 75 volts prior to ignitor warm-up, control will signal waiting on
call from thermostat, and will not respond.

NOTE − Slow flash rate equals 1 Hz (one flash per second). Fast flash rate equals 3 Hz (three flashes per second).
Low flame sense current = 0.17−0.22 microAmps.

Page 27

Dip Switch Settings
Switches 1 and 2 −− Blower Off Delay −− The blower−on

delay of 45 seconds is not adjustable. The blower−off delay
(time that the blower operates after the heating demand
has been satisfied) can be adjusted by moving switches 1
and 2 on the integrated control board. The unit is shipped
from the factory with a blower−off delay of 90 seconds. The
blower off delay affects comfort and is adjustable to satisfy
individual applications. Adjust the blower off delay to
achieve a high fire supply air temperature between 90° and
110°F at the exact moment that the blower is de−energized.
Longer off delay settings provide lower supply air tempera­tures; shorter settings provide higher supply air tempera­tures. The table below provides the blower off timings that
will result from different switch settings.

TABLE 7

Blower Off Delay Switch Settings

Blower Off Delay

(Seconds)

Switch 1 Switch 2

60 Off Off

90 Off On
120 On Off
180 On On

Switch 3 −− Second Stage Delay (Used with Single−
Stage Thermostat Only) −− This switch is used to deter-

mine the second stage on delay when a single−stage ther­mostat is being used. The switch is factory−set in the ON
position, which provides a 10−minute delay before second−
stage heat is initiated. If the switch is toggled to the OFF
position, it will provide a 15−minute delay before second−
stage heat is initiated. This switch is only activated when
the E20 thermostat selector jumper is positioned for
SINGLE−stage thermostat use.

Switch 4 −− Not used in G61MPV application.

Switches 5 and 6 −− Cooling Mode Blower Speed −−

Switches 5 and 6 are used to select second stage cooling
blower motor speed (first stage cooling speed is 70% of
second stage). The unit is shipped from the factory with the
dip switches positioned for high speed (4) indoor blower
motor operation during the cooling mode. The table below
provides the cooling mode blower speeds that will result
from different switch settings. Refer to blower data tables at
the front of this manual for corresponding cfm values.

TABLE 8

Cooling Mode Blower Speeds

Speed

Switch 5 Switch 6

1 − Low On On

2 − Medium Low Off On

3 − Medium High On Off

4 − High (Factory) Off Off

Switches 7 and 8 −− Blower Speed Adjustment −−

Switches 7 and 8 are used to select blower speed adjust­ment settings. The unit is shipped from the factory with the
dip switches positioned for NORMAL (no) adjustment. The

dip switches may be positioned to adjust the blower speed
by +10% or −10% to better suit the application. The table
below provides blower speed adjustments that will result
from different switch settings. Refer to blower data tables at
the front of this manual for corresponding cfm values.

TABLE 9

Blower Speed Adjustment

Adjustment

Switch 7 Switch 8

+10% (approx.) On Off

NORMAL (Factory) Off Off

−10% (approx.) Off On

Switches 9 and 10 −− Cooling Mode Blower Speed
Ramping −− Switches 9 and 10 are used to select cooling

mode blower speed ramping options. Blower speed ramp­ing may be used to enhance dehumidification perfor­mance. The switches are factory set at option A which has
the greatest effect on blower motor performance. The table
below provides the cooling mode blower speed ramping
options that will result from different switch settings. The
cooling mode blower speed ramping options are detailed
below.

TABLE 10

Cooling Mode Blower Speed Ramping

Ramping Option

Switch 9 Switch 10

A (Factory) Off Off

B On Off
C Off On
D On On

COOLING MODE RAMPING OPTIONS

Ramping Option A (Factory Selection)

S Motor runs at 50% for 30 seconds.
S Motor then runs at 82% for approximately 7−1/2 min-

utes. If demand has not been satisfied after 7−1/2 min­utes, motor runs at 100% until demand is satisfied.

S Once demand is met, motor runs at 50% for 30 sec-

onds then ramps down to stop.

OFF

1/2 MIN
50% CFM

7 1/2 MIN
82% CFM

COOLING DEMAND

Ramping Option B

S Motor runs at 82% for approximately 7−1/2 minutes. If

demand has not been satisfied after 7−1/2 minutes,
motor runs at 100% until demand is satisfied.

S Once demand is met, motor ramps down to stop.

7 1/2 MIN

OFF

82%CFM

COOLING DEMAND

100%
CFM

100% CFM

1/2 MIN
50% CFM

OFF

OFF

Page 28

Ramping Option C

S Motor runs at 100% until demand is satisfied.

S Once demand is met, motor runs at 100% for 60 sec-

onds then ramps down to stop.

OFF

100% CFM

DEMAND

100% CFM

60 SEC.

OFF

Ramping Option D

S Motor runs at 100% until demand is satisfied.

S Once demand is met, motor ramps down to stop.

100% CFM

COOLING
DEMAND

OFFOFF

Switches 11 and 12 −− Heating Mode Blower Speed −−

Switches 11 and 12 are used to select second stage heat-

ing mode blower motor speed (first stage heating blower

speed is 91% of second stage). The unit is shipped from the

factory with the dip switches positioned for medium low (2)

speed indoor blower motor operation during the heating

mode. The table below provides the heating mode blower

speeds that will result from different switch settings. Refer

to blower data tables at the front of this manual for corre-

sponding cfm values.

TABLE 11

Heating Mode Blower Speeds

Speed

Switch 11 Switch 12

1 − Low On On

2 − Medium Low

(Factory)

Off On

3 − Medium High On Off

4 − High Off Off

On−Board Jumper W914

On−board jumper W914, which connects terminals DS and
R on the integrated control board, must be cut when the fur­nace is installed with the Harmony II zone control board,
the CCB1 EfficiencyPlus humidity control or the Lennox
SignatureStat.t If the jumper is left intact the PMW signal
from the Harmony II control will be blocked and also lead to
control damage. The SignatureStat and CCB1 will not op­erate unless the jumper is cut. Refer to table 21 for opera­tion sequence in applications including a G61MPV, CCB1
and single−speed outdoor unit. Table 22 gives the opera­tion sequence in applications with a two−speed outdoor
unit. See table 23 for applications for a G61MVP, Signatu­reStat and single−speed outdoor unit and table 24 for ap­plications with a two−speed outdoor unit.

On−Board Jumper W951

On−board jumper W951, which connects terminals R and O
on the integrated control board, must be cut when the fur­nace is installed in applications which include a heat pump
unit and the FM21 FuelMaster control board. If the jumper
is left intact, terminal "O" will remain energized eliminating
the HEAT MODE in the heat pump.

On−Board Jumper W915

On−board jumper W915, which connects terminals Y1 and
Y2 on the integrated control board, must be cut if two−stage
cooling will be used. If the jumper is not cut the outdoor unit
will operate in first−stage cooling only.

Diagnostic LEDs (DS1 and DS2)

Two diagnostic LEDs are located on the two−stage, vari­able speed integrated control just to the left of the first bank
of dip switches. These flashing lights correspond with diag­nostic codes detailed on page 52.

Status LEDs (HEAT, HI/LO, ON/OFF and CFM)

The integrated control includes four LEDs which indicate
operating status. The green ON/OFF LED is lit any time the
blower is operating. The green CFM LED indicates the
blower motor speed. Count the number of blinks between
the two−second pauses to determine the CFM. Each blink
represents approximately 100 CFM. The yellow HI/LO LED
is lit when the W914 (DS to R) jumper has not

been clipped
for SignatuteStat, CCB1 or Harmony operation. The yellow
HEAT LED is lit when the indoor blower is operating at the
HEATING speed.

Page 29

WARNING

Shock hazard.
Disconnect power before servicing. Integrated

Control Board is not field repairable. If control is
inoperable, simply replace entire control.

Can cause injury or death. Unsafe operation will
result if repair is attempted.

5. Integrated Control Board(A92)
SureLight Board 100870

G61MPV −7 and later units are equipped with the Lennox
two−stage, variable speed integrated SureLight control
board. The system consists of a ignition / blower control
board (figures 5 and 6) with control pin designations in
tables 12, 13 and 14 and ignitor (figure 13). The board and
ignitor work in combination to ensure furnace ignition and
ignitor durability. The SureLight integrated board controls
all major furnace operations. The board features a red LED
light, for furnace status and troubleshooting. The LED
flashes in X" + Y" codes. For example using table 15 un­der PRESSURE SWITCH CODES", if the red LED
flashes 2 times, then off for 2 seconds then flashes 3
times, the low pressure switch is failed open. Two green
LEDs show indoor blower status and CFM. See Page 35
for more detail. The board also has two 120 volt accesso­ry terminals rated at (1) one amp each. In addition there is
a 24 volt accessory terminal located on TB1.

Electronic Ignition

At the beginning of the heat cycle the SureLight control
monitors the first stage and second stage combustion air
inducer prove switch. The control will not begin the heating
cycle if the first stage prove switch is closed (by−passed).
Likewise the control will not begin the second stage heating
cycle if the second stage prove switch is closed, and will re­main in first stage heat. However, if the second stage prove
switch closes during the first stage heat pre−purge, the con­trol will allow second stage heat. Once the first stage prove
switch is determined to be open, the combustion air induc­er is energized on low (first stage) heat speed. When the
differential in the prove switch is great enough, the prove
switch closes and a 15−second pre−purge begins. If the
switch is not proven within 2−1/2 minutes, the control goes
into Watchguard−Pressure Switch mode for a 5−minute re−
set period.

After the 15−second pre−purge period, the SureLight ignitor
warms up for 20 seconds after which the gas valve opens
for a 4−second trial for ignition. The ignitor energizes during
the trial until flame is sensed. If ignition is not proved during
the 4−second period, the control will try four more times with
an inter purge and warm−up time between trials of 35 sec­onds. After a total of five trials for ignition (including the ini­tial trial), the control goes into Watchguard−Flame Failure
mode. After a 60−minute reset period, the control will begin
the ignition sequence again.

NOTE − Board 100870 provides a regulated 95 volts
the ignitor.

Two Stage Operation / Thermostat Selection Jumper

The control can be utilized in two modes: SINGLE−STAGE
thermostat or TWO−STAGE thermostat. The thermostat
selection is made using a dip switch (figure 4) and must be
positioned for the particular application. The dip switch is
factory set on TWO" for use with a two−stage thermostat
with two stage heat. Re−position dip switch to SINGLE" for
use with a single stage thermostat with two stage heat.
While in the single−stage thermostat mode (single dip
switch setting), the burners will always fire on first−stage
heat. The combustion air inducer will operate on low speed
and indoor blower will operate on low heat speed. After a
factory default 10 minute recognition period, the unit will
switch to second stage heat. While in the two−stage ther­mostat mode (two dip switch setting) the burners will fire on
first−stage heat. The combustion air inducer will operate on
low speed and indoor blower will operate on low heat
speed. The unit will switch to second−stage heat on call
from the indoor thermostat. If there is a simultaneous call
for first and second stage heat, the unit will fire an first stage
heat and switch to second stage heat after 30 seconds of
operation. See Sequence of Operation flow charts in the
back of this manual for more detail.

Page 30