User manual | G51MP ELITE SERIES

GAS FURNACES
G51MP
ELITE® SERIES
Multi−Position
ENGINEERING DATA
Bulletin No. 210381
September 2006
Supersedes August 2006
AFUE − 92.1%
Input − 44,000 to 132,000 Btuh
Nominal Add−on Cooling − 2 to 5 Tons
MODEL NUMBER IDENTIFICATION
G 51 MP − 24 B − 045
Unit Type
G = Gas Furnace
Series
51 = 90% Minimum AFUE
Configuration
MP = Multi−Position
Nominal Add−On Cooling Capacity
24 = 2 tons
36 = 3 tons
48 = 4 tons
60 = 5 tons
Nominal Gas Heat Input
045 = 44,000 Btuh
070 = 66,000 Btuh
090 = 88,000 Btuh
110 = 110,000 Btuh
135 = 132,000 Btuh
1 Cabinet Width
B = 17−1/2 in.
C = 21 in.
D = 24−1/2 in.
1 Indoor
coils with the same letter designation will physically match the furnace.
FEATURES
CONTENTS
Blower Data . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 15−16
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pages 9−14
Exhaust Pipe Venting Information . . . . . . . . . . . . . Page 8
Features and Options . . . . . . . . . . . . . . . . . . . . Pages 2−5
Filter Air Resistance . . . . . . . . . . . . . . . . . . . . . . . . Page 5
Installation Clearances . . . . . . . . . . . . . . . . . . . . . . Page 5
Model Number Identification . . . . . . . . . . . . . . . . . Page 1
Optional Accessories Selection Table . . . . . . . . . Page 7
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
WARRANTY
Duralok Plus® Aluminized Steel Heat Exchanger −
Limited lifetime warranty in residential applications
(twenty year transferrable), twenty year limited warranty
in non−residential applications.
All other covered components − Five years limited
warranty in residential applications, one year limited
warranty in non−residential applications.
Refer to Lennox Equipment Limited Warranty certificate
included with equipment for details.
APPROVALS
Units certified by CSA International and ratings are
certified by GAMA.
Units tested and rated according to US DOE test
procedures and FTC labeling regulations.
Blower data from unit tests conducted in Lennox
Laboratory air test chamber.
Approved by the California Energy Commission and
meets California Seasonal Efficiency requirements and
California Nitrogen Oxides (NOx) Standards.
ENERGY STAR® certified units are designed to use less
energy, help save money on utility bills, and help protect the
environment.
ISO 9001 Registered Manufacturing Quality System.
APPLICATIONS
Input capacities of 44,000, 66,000, 88,000, 110,000, and
132,000 Btuh.
Energy efficiency (AFUE) up to 92.1% in all four
installation configurations.
Compact cabinet for up−flow, down−flow, horizontal−left or
horizontal−right applications without any modifications to
the unit.
Lennox add-on indoor coils, high−efficiency air cleaners
and humidifiers can easily be added to furnace.
Shipped factory assembled with all controls installed and
wired.
Each unit factory test operated to ensure proper
operation.
DIRECT VENT / NON−DIRECT VENT
Furnace can be installed in either Direct Vent or
Non−Direct applications. In Direct Vent applications,
combustion air is supplied from outdoors and flue gases
are discharged outdoors. In Non−Direct Vent applications,
combustion air is supplied from indoors and flue gases are
discharged outdoors.
G51MP / Page 2
B
D
N
K
G
E
F
P
O
H J
I
C
L
M
OPTIONS
Termination Kits
Facilitates installation of combustion air intake pipe and
flue exhaust pipe.
Refer to venting table in this bulletin to determine pipe
size needed and proper termination kit required.
See Specifications table and dimension drawings.
Termination Kit − Concentric − Direct Vent Applications
Only
2 or 3 inch kit contains concentric termination assembly,
reducer bushing and 45 degree elbow.
2 inch kit for −045−070 models contains an exhaust
accelerator.
Kit requires single hole penetration of roof or wall for
installation.
Roof Termination Flashing Kit is available for use with 2
inch Kits.
CSA certified.
Termination Kits − Wall Assembly
Close Couple − Direct Vent Applications Only
2 or 3 inch kit consists of close-couple, side-by-side PVC
piping with galvanized steel wall cover plate for sealing
and isolating piping penetration of the wall.
Piping spacing and length is sized for proper wall
installations. CSA certified.
Close Couple WTK − Direct Vent Applications Only
2 or 3 inch kit contains one insulated faceplate, one
insulated exhaust pipe, elbow and fittings.
FEATURES
Wall Ring − Direct or Non−Direct Vent
2 inch kit contains 2 stainless steel outside seal caps, 2
galvanized steel inside seal caps, 4 seal rings for the caps
and 18 inch insulation sleeve for sealing and isolating
intake and exhaust piping penetration of wall.
Maintain a maximum of 6 inches between the inlet and
outlet openings in the installation of the pipes.
Roof Termination Flashing Kit − Direct or Non−Direct
Vent
2 or 3 inch kit contains two neoprene rubber roof flashings
for vertical venting through a roof.
Vent pipe and insulation not furnished. Each kit contains
enough parts for two non−direct vent installations.
Available for use with 2 inch (use 3 inch flashing)
Concentric Vent Termination Kits used in vertical venting
rooftop applications.
HEATING SYSTEM
B Lennox Duralok Plus® Heat Exchanger Assembly
Lennox developed heat exchanger assembly consists of
primary heat exchanger and secondary condenser coil
assembly.
Main 3-pass clamshell type heat exchanger constructed
of heavy−gauge, aluminized steel.
Designed for normal expansion and contraction.
Crimped seam design and construction provides
maximum efficiency and minimum resistance to airflow.
C Secondary heat exchanger condenser coil constructed of
aluminum fins fitted to stainless steel tubes.
Coil is factory tested for leaks.
Condensate drain header box assembly located on front
of coil.
Compact size of complete heat exchanger assembly
permits low overall design of furnace cabinet.
All components mounted in a heavy−gauge steel frame.
Heat exchanger assembly has been laboratory life cycle
tested.
Lennox Designed Header Box
Header box on end of condenser coil collects flue
condensate for disposal through condensate collars.
Hose connects the header box drains to the condensate
collars.
The condensate collars are located on each side of the
cabinet for easy field installation of condensate drain trap.
Only one collar is used, the remainder stay plugged.
Condensate drain trap is included with the unit for field
installation.
Lennox Designed Flue Condensate Trap Assembly
Condensate trap assembly is mounted outside the
conditioned air stream.
Assembly can be mounted on either side of cabinet in
up−flow and down−flow applications. Assembly is mounted
on the bottom of the cabinet in horizontal applications. See
Installation Instructions.
Connection can be made with field provided 1/2 in. PVC
pipe, 3/4 in. PVC coupling, or 1−1/4 in. OD x 1 in. ID tubing
with hose clamp.
Easy to clean and winterize.
D Inshot Burners
Aluminized steel inshot burners provide efficient,
trouble−free operation.
Burner venturi mixes air and gas in correct proportion for
proper combustion.
Burner assembly is removable from the unit as a single
component for ease of service.
E
F
G
SureLight® Hot Surface Ignitor
Tough, reliable, long−life, trouble−free performance.
Tungsten heater element sandwiched between two plates
of silicon nitride.
Cemented to steatite block for protection against current
leakage.
Ignition leads constructed of nickel plated copper
enclosed in high temperature Teflon insulation for
dependable operation. No electrical noise.
Gas Control Valve
24 volt redundant combination gas control valve
combines manual shut off valve (On−Off), automatic
electric valve (dual) and gas pressure regulation into a
compact combination control.
Combustion Air Inducer
Shaded pole heavy−duty blower prepurges heat
exchanger and safely vents flue products.
Pressure switches prove blower operation before
allowing gas valve to open.
Operates only during heating cycle.
Limit Control
Automatic reset, primary and secondary limits are
accurately located.
Primary limit factory installed on vestibule panel on all
units, secondary limit factory installed on blower housing.
Flame Rollout Switch
Manual reset switches are factory installed on burner box.
Switch provides protection from abnormal operating
conditions.
OPTIONS
High Altitude Orifice Kit − Natural Gas Only
Required for all natural gas models for proper unit
operation at altitudes of 7501 to 10,000 feet.
Proper orifice for LPG/Propane models is included with
LPG/Propane Conversion Kit.
High Altitude Pressure Switch Kit
Required on certain units for proper unit operation on
installations above 4,500 ft. Order two per unit.
LPG/Propane Conversion Kit
Required for field changeover from natural gas to
LPG/Propane.
G51MP / Page 3
FEATURES
CONTROLS
H SureLight® Integrated Furnace Control Board
Solid−state board contains all necessary controls and
relays to operate furnace.
Combustion air inducer is controlled by board. Prior to
ignition, a pre−purge cycle for 15 seconds is initiated. After
the main burners are turned off, a post−purge cycle for 5
seconds is run.
Adaptive technology of ignition control board continuously
monitors and adjusts the ignitor power to operate at
minimum ignitor temperature required for ignition,
prolonging ignitor life.
Electronic flame sensor control assures safe and reliable
operation.
Should loss of flame occur, flame sensor controls will
initiate 5 attempts at re−ignition before locking out unit
operation for 60 minutes.
Watchguard type circuit automatically resets ignition
controls after one hour of continuous thermostat demand
after unit lockout, eliminating nuisance calls for service.
Fan control consists of adjustable blower timed−off delay
(60, 90, 120, 180 seconds − factory setting 90 seconds)
and fixed blower timed−on delay (45 seconds).
For air−conditioning applications, blower is automatically
energized on thermostat demand for cooling.
Terminal for continuous low speed blower operation.
I Two accessory terminals furnished for additional power
supply requirements for 120 volt (less than 1 amp) power
humidifiers and powered air cleaners.
Ignition control has two LED’s to indicate status and as an
aid in troubleshooting.
24
J Volt Transformer
Furnished and factory installed in control box.
40VA transformer has circuit breaker wired in series.
K Field Wiring Make-up Box
Furnished for line voltage wiring.
Factory installed internally on left side of furnace.
Box may be installed internally or externally on either
side of furnace.
OPTIONS
Thermostat
See Thermostat bulletins in Controls section and Lennox
Price Book for a complete list of thermostats.
Twinning Kit
Required to operate two furnaces simultaneously.
Kit consists of twinning control and two fan sensors.
BLOWER
L Multi-speed, direct drive blower.
Statically and dynamically balanced.
Resiliently mounted.
M Blower assembly slides out of unit for servicing.
Blower speeds are easily changed on the integrated
furnace control board. See blower performance tables.
FILTER (NOT FURNISHED)
Filter and provisions for external mounting must be field
provided.
OPTIONS
Air Filter and Rack Kit for Horizontal Return Air (End)
Applications
Washable or vacuum cleanable polyurethane frame type
filter and external end return air rack available for field
installation.
Rack has filter door for easy filter servicing.
Flanges on rack allow easy duct connection.
See dimension drawing.
G51MP / Page 4
Air Filter and Rack Kit for Side Return Air
Applications (Not for use with RAB Return Air Base)
Washable or vacuum cleanable polyurethane frame type
filter and external side return air rack available for field
installation.
Available in single and ten pack kits.
Rack has filter door for easy filter servicing.
Flanges on rack allow easy duct connection.
Field installs on either side of unit cabinet.
See dimension drawing.
EZ Filter Base for Bottom Return Air Applications
Hinged door with thumbscrew for easy filter access.
Uses standard size filters (field provided).
CABINET
Low−profile, narrow width cabinet allows easy installation
in up−flow, down−flow or horizontal applications.
Heavy−gauge, cold rolled steel construction.
Pre−painted cabinet finish.
Flanges provided on supply air opening for ease of
plenum connection or alignment with indoor coil.
N Fully insulated cabinet with foil faced insulation on sides
and back of heating compartment and mat faced
insulation in blower compartment.
O Tool−less latches on blower and burner doors assure
positive lock.
Complete service access.
Safety interlock switch automatically shuts off power to
unit when blower compartment access door is removed.
P Gas piping and electrical inlets are provided in both sides of
cabinet.
Return Air Entry:
For bottom/end return−air entry for up−flow/horizontal
applications, remove furnished bottom seal panel from
cabinet.
For side return−air entry (up−flow applications only),
corners are marked on either side of cabinet for return air
cut−outs.
On furnaces with side return air and condensate trap on
the same side of the cabinet, a field fabricated transition or
RAB is required when using an IAQ product higher than
14−3/16 in. installed next to the unit and serviced from the
front. IAQ products higher than 20 in. require a field
fabricated transition. See dimension drawings.
NOTE − 60C and 60D size units that require air
volumes over 1800 cfm must have one of the
following:
1. Single side return air with transition, to accommodate
20 x 25 x 1 in. cleanable air filter, required to maintain
proper air velocity.
2. Single side return air with optional RAB Return Air Base.
3. Bottom return air.
4. Return air from both sides.
5. Bottom and one side return air.
See Blower Performance Tables for additional
information.
Coil Match−up
All furnaces exactly match C33 and CX34 cased up−flow
indoor coils and CH33 horizontal indoor coils with same
letter designation in model number. No adaptor required.
Engaging holes furnished on cabinet for alignment.
C33 uncased coils match furnaces without any overhang
but require an optional adaptor base or field fabricated
transition to match furnace opening. See C33 coil bulletin for
additional information.
All furnaces exactly match CR33 cased, down−flow indoor
coils with adaptor rails, furnished with coil.
FEATURES
OPTIONS
Condensate Drain Heat Cable Kits
Self-limiting wattage heat cable prevents condensate
drain from freezing in unconditioned areas.
Available in 6, 24 or 50 ft. lengths.
Heat Cable Tape:
66 ft. length, 1/2 in. wide fiberglass.
60 ft. length, 2 in. wide aluminum foil.
Condensate Trap Alternate Location Kit
Allows condensate drain to be installed on the opposite
side of the furnace from the exhaust venting (up−flow
applications only).
Down−Flow Additive Base
Required for heating only units installed on combustible
floors.
Not required in add-on cooling applications.
See Dimension Drawing.
FILTER AIR RESISTANCE
INSTALLATION CLEARANCES
For 1 Inch Cleanable Filter (Field Provided)
cfm
0
200
400
600
800
1000
1400
1600
1800
2000
2200
2400
2600
Horizontal Support Frame Kit
Provides support of unit in horizontal applications.
Consists of (2) 1 x 1-1/2 x 32-5/8 in. and (2) 1 x 3 x 53-7/8
in. painted, heavy−gauge cold rolled steel support
channels with assembly and suspending holes.
Bolts and nuts furnished for field assembly.
Suspending rods must be field provided.
RAB Return Air Base
On furnaces with a side return air and condensate trap on
the same side of the cabinet, a field fabricated transition or
RAB is required when using an IAQ product higher than
14−3/16 in. installed next to the unit and serviced from the
front. IAQ products higher than 20 in. require a field
fabricated transition.
Must be used for 60C and 60D models with air volumes
over 1800 cfm in up−flow applications when only one side
return is required.
Cabinet is pre−painted steel to match the furnace.
See Dimension Drawing.
in. w.g.
0.00
0.01
0.03
0.04
0.06
0.09
0.15
0.19
0.23
0.27
0.33
0.38
0.44
Sides
10
inches (0 mm)
Rear
0 inches (0 mm)
Top/Plenum
1 inch (25 mm)
Front
0 inches (0 mm)
Front (service/alcove)
Floor
24 inches (610 mm)
2 Combustible
NOTE − Air for combustion and supply air ventilation must conform to the methods
outlined in American National Standard (ANSI-Z223.1) National Fuel Gas Code or
National Standard of Canada CAN/CGA-149.1, & CAN/CGA-149.2 Installation Code
for Gas Burning Appliances".
NOTE−In the U.S. flue sizing must conform to the methods outlined in current
GAMA/A.G.A. venting tables, American National Standard (ANSI-Z223.1) National
Fuel Gas Code or applicable provisions of local building codes. In Canada flue sizing
must conform to the methods outlined in National Standard of Canada
CAN/CGA-149.1 and .2.
1 Allow proper clearances to accommodate condensate trap and vent pipe
installation.
2 Clearance for installation on combustible floor if optional additive base is installed
between furnace and combustible floor. Not required in add-on cooling applications
if installed in accordance with local codes or National Fuel Gas Code ANSI-Z223.1
or CAN/CGA−149.1,.2. Do not install the furnace directly on carpeting, tile, or other
combustible materials other than wood flooring.
G51MP / Page 5
SPECIFICATIONS
ModelNo.
G51MP
−24B−045
G51MP
−36B−045
G51MP
−36B−070
G51MP
−36C−090
G51MP
−48C−090
Input− Btuh
44,000
44,000
66,000
88,000
88,000
Output− Btuh
41,000
41,000
62,000
82,000
82,000
Temperature rise range − F
30 − 60
25 − 55
40 − 70
40 − 70
40 − 70
1 AFUE
Gas
Heating
Performance
92.1%
92.1%
92.1%
92.1%
92.1%
Highstatic(CSA)− in.w.g.
.50
.50
.50
.50
.50
Gas Manifold Pressure (in. w.g.) − Natural Gas
3.5
3.5
3.5
3.5
3.5
LPG/Propane
10.0
10.0
10.0
10.0
10.0
Intake / Exhaust Pipe (PVC)
2/2
2/2
2/2
2/2
2/2
Condensate Drain Trap (PVC pipe) − i.d.
1/2
1/2
1/2
1/2
1/2
Connections
in
in.
with field supplied (PVC coupling) − o.d.
3/4
3/4
3/4
3/4
3/4
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
1/2
1/2
1/2
1/2
1/2
10 x 7
10 x 8
10 x 8
10 x 8
10 x 10
Motoroutput − hp (W)
1/5
1/3
1/3
1/3
1/2
Tons ofadd−oncooling
2 − 2.5
2−3
2−3
2−3
3−4
Air Volume Range − cfm
465 − 1125
730 − 1555
710 − 1640
730 − 1630
950 − 2180
132
136
146
164
168
hose with hose clamp − i.d. x o.d.
GaspipesizeIPS
Indoor
Blo er
Blower
Wheel nominal diameter x width −in.
ShippingData − lbs. − 1 package
Electricalcharacteristics
120 volts − 60 hertz − 1 phase (less than 12 amps)
SPECIFICATIONS
Gas
Heating
Performance
ModelNo.
G51MP−60C−090
G51MP−48C−110
G51MP−60C−110
G51MP−60D−135
Input− Btuh
88,000
110,000
110,000
132,000
Output− Btuh
82,000
103,000
103,000
123,000
.50
.50
.50
.50
Highstatic(CSA)− in.w.g.
1 AFUE
92.1%
92.1%
92.1%
92.1%
Temperature rise range − F
30 − 60
45 − 75
40 − 70
45 − 75
Gas Manifold Pressure (in. w.g.) − Natural Gas
3.5
3.5
3.5
3.5
LPG/Propane
10.0
10.0
10.0
10.0
Intake / Exhaust Pipe (PVC)
2/2
2/2
2/2
3/3
Condensate Drain Trap (PVC pipe) − i.d.
1/2
1/2
1/2
1/2
Connections
in
in.
with field supplied (PVC coupling) − o.d.
3/4
3/4
3/4
3/4
1−1/4 x 1
1−1/4 x 1
1−1/4 x 1
1−1/4 x 1
1/2
1/2
1/2
1/2
11−1/2 x 10
10 x 10
11−1/2 x 10
11−1/2 x 10
1
1/2
1
1
Tons ofadd−oncooling
4−5
3−4
4−5
4−5
Air Volume Range − cfm
1440 − 2840
885 − 2160
1470 − 2720
1440 − 2730
176
178
186
206
hose with hose clamp − i.d. x o.d.
GaspipesizeIPS
Indoor
Blo er
Blower
Wheelnominaldiameter xwidth −in.
Motoroutput − hp
ShippingData − lbs. − 1 package
Electricalcharacteristics
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.
G51MP / Page 6
OPTIONAL ACCESSORIES − MUST BE ORDERED EXTRA
B" Width Models
C" Width Models
D" Width Models
87L96 − 18 x 25 x 1
44J22
66K63
16 x 25 x 1
73P56 − 7
16 x 25 x 1
87L97 − 20 x 25 x 1
44J22
66K63
16 x 25 x 1
73P57 − 8
20 x 25 x 1
87L98 − 25 x 25 x 1
44J22
66K63
16 x 25 x 1
73P58 − 10
24 x 24 x 1
11M60
56J18
98M60
11M61
56J18
98M58
11M62
56J18
98M59
26K68
26K69
26K70
39G04
39G03
76M20
26K68
26K69
26K70
39G04
39G03
76M20
26K68
26K69
26K70
39G04
39G03
76M20
15L38
15L38
15L38
FILTER KITS
1
Air Filter and
Rack Kit
EZ Filter Base
Horizontal (end)
Size of filter − in.
Single
Ten Pack
Size of filter − in.
Catalog No. − Ship. Wt. − lbs.
Size of field provided filter − in.
Side Return
CABINET ACCESSORIES
Down−Flow Additive Base
Horizontal Support Frame Kit
Return Air Base
CONDENSATE DRAIN KITS
6 ft.
24 ft.
50 ft.
Fiberglass − 1/2 in. x 66 ft.
Heat Cable Tape
p
Aluminum foil − 2 in. x 60 ft.
Condensate Trap Alternate Location Kit − Up−Flow Only
Condensate Drain Heat Cable
CONTROLS
Twinning Kit
TERMINATION KITS − See Installation Instructions for specific venting information.
2 in.
3 in.
2 in.
3 in.
Close Couple WTK − 2 in.
3 in.
Roof
2 in.
Wall − Wall Ring
2 in.
Kit
Termination Kits Concentric
Di
Direct
t Vent
V t
Applications
Wall − Close
Only
C
Couple
l
2 Termination
Kits − Di
Kit
Directt or
Non−Direct Vent
2 Roof Termination Flashing Kit − Direct or Non−Direct
Vent − Contains two flashings.
1
2
3
71M80
−−−
22G44
44J40
30G28
81J20
15F75
15F74
69M29
60L46
−−−
44J40
−−−
81J20
15F75
15F74
−−−
60L46
−−−
44J40
−−−
81J20
3 15F74
44J41
44J41
44J41
−−−
Cleanable polyurethane frame type filter.
Kits contain enough parts for two, non−direct vent installations.
Non−direct vent only
GAS HEAT ACCESSORIES
Input
High Altitude
Orifice Kit
Natural Gas Only
−045
−070
−090
−110
−135
7501−10,000 ft.
59M17
59M17
59M17
59M17
59M17
High Altitude Pressure
Switch Kit − Order two each
4501−7500 ft.
−−−
56M05
75M20
75M20
56M04
7501−10,000 ft.
95M22
56M06
56M07
56M07
60M35
LPG/Propane Kit
0−7500 ft.
83M74
83M74
83M74
83M74
83M74
7501−10,000 ft.
83M75
83M75
83M75
83M75
83M75
G51MP / Page 7
EXHAUST PIPE VENTING TABLE
1
Vent Size
(diameter)
Altitude
0 − 2000 ft.
2001 − 4500 ft.
4501 − 7500 ft.))
7501 − 10,000
,
ft.
2 in.
2−1/2 in.
3 in.
4 in.
2 in.
2−1/2 in.
3 in.
4 in.
2 in.
2−1/2 in.
3 in.
4 in.
2 in.
2−1/2 in.
3 in.
4 in.
Maximum Equivalent Vent Length (feet) − One or Two Pipe Applications
G51MP−36C−090 2 G51MP−48C−110
G51MP−24B−045
G51MP−48C−090 2 G51MP−60C−110 3 G51MP−60D−135
G51MP−36B−070
G51MP−36B−045
G51MP−60C−090
110
70
50
30
n/a
135
135
100
70
n/a
4 125
160
160
125
125
250
250
225
200
180
110
70
50
20
n/a
135
135
100
70
n/a
4 90
160
160
125
125
250
250
225
200
180
110
70
30
n/a
n/a
135
135
100
70
n/a
4 90
160
160
125
125
250
250
225
200
180
110
70
n/a
n/a
n/a
135
135
100
70
n/a
4 90
160
160
125
125
250
250
225
200
180
NOTE − Minimum Equivalent Vent Pipe length is 15 feet.
1 Maximum Equivalent Vent Length" permitted is defined as Total Length (linear feet) of vent pipe, plus equivalent length (ft.) of fittings, plus equivalent length (ft.) of termination".
2 110 models installed in up−flow or down−flow applications must have the supplied 90° street ell installed directly into the unit flue collar. The street ell must be included in the
elbow count.
3 135 models installed in up−flow or down−flow applications must have 3 in. to 2 in. reducing elbow (supplied) installed directly into the flue collar. Reducing ell must be included
in elbow count.
4 90 elbows must be limited to 3 in. sweep type elbows.
VENTING NOTES One 90elbow is equivalent to 5 feet of straight vent pipe.
Two 45 elbows are equal to one 90 elbow.
One 45 elbow is equivalent to 2.5 feet of straight vent pipe.
Wall and roof termination (non−concentric) exhaust pipe must terminate with reducer to improve exhaust velocity away from intake piping.
045 and 070 − 2, 2−1/2, 3 or 4 in. − terminate with 1−1/2 in. pipe
090 − 2, 2−1/2, 3 or 4 in. − terminate with 2 in. pipe
110 − 2, 2−1/2, 3 or 4 in. − terminate with 2 in. pipe
135 − 3 or 4 in. − terminate with 2 in. pipe
TERMINATION KITS − EQUIVALENT VENT LENGTHS
Vent Pipe Equivalent Length − feet
Heat
Size
Vent Pipe
Diameter −
in.
Concentric
Kits
2 in.
4 71M80
−045
045
−070
070
−090
090
−110
110
−135
1
2
3
4
2
2−1/2
3
4
2
2−1/2
3
4
2
2−1/2
3
4
2
2−1/2
3
4
3
4
69M29
12
15
41
42
12
15
24
42
3
6
6
12
3
6
6
12
not allowed
not allowed
Close Couple
Kits
3 in.
60L46
not
not
not
not
not
not
not
not
allowed
allowed
allowed
allowed
allowed
allowed
allowed
allowed
3
6
6
12
3
6
6
12
15
25
2 in.
3 in.
22G44
44J40
30G28 (WTK) 81J20 (WTK)
14
4
15
5
17
7
1
14
14
14
4
15
5
18
8
1 14
14
not allowed
1
not allowed
2
not allowed
2
not allowed
4
not allowed
1
not allowed
2
not allowed
2
not allowed
4
not allowed
6
not allowed
10
Wall Ring
Kit
Outdoor Exhaust
Accelerator
(Diameter X Length)
2 in.
For use with Close Couple
and Wall Ring Kits
15F74
4
5
7
14
4
5
8
14
21
22
22
24
21
32
32
34
36
3 10
1−1/2 x 12 in.
not
not
not
not
not
not
not
not
not
not
4
5
7
14
4
5
8
14
allowed
allowed
allowed
allowed
allowed
allowed
allowed
allowed
allowed
allowed
Requires field provided 1−1/2 in. outdoor exhaust accelerator.
Requires field provided 2 in. outdoor exhaust accelerator.
For use only in non−direct vent applications, when snow riser is not required. Requires field provided 2 in. (51 mm) outdoor exhaust accelerator.
Outdoor exhaust accelerator included in 71M80 kit; for use with −045−070 models.
G51MP / Page 8
2 x 12 in.
not
not
not
not
not
not
not
not
allowed
allowed
allowed
allowed
allowed
allowed
allowed
allowed
1
2
2
4
1
2
2
4
6
10
DIMENSIONS − INCHES (MM) UP−FLOW POSITION SHOWN
1 NOTE − 60C and 60D size units that require air volumes over
1800 cfm (850 L/s) must have one of the following:
a. Single side return air with transition, to accommodate
20 x 25 x 1 in. (508 x 635 x 25 mm) air filter. Required to
maintain proper air velocity.
b. Single side return air with optional RAB Return Air Base
c. Bottom return air.
d. Return air from both sides.
e. Bottom and one side return air.
SUPPLY AIR
OPENING
See Blower Performance Tables for additional information.
2 Optional
External Side Return Air Filter Kit (Up−Flow Only) is not
for use with the optional RAB Return Air Base.
OPTIONAL
EXTERNAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
A
B
23-3/4 (603)
2
9/16 (14)
25 (635)
TOP VIEW
28−1/2
(724)
5−1/2
(140)
6−1/2
11−5/8 (295) (165)
Right
9−3/4 (248) 4−1/8
(103)
Left
2 OPTIONAL
EXTERNAL
SIDE RETURN
AIR FILTER KIT
(Either Side)
40
(1016)
6−1/2
(165)
COMBUSTION AIR INTAKE
(Either Side)
3−1/8
(79)
EXHAUST AIR OUTLET
(Either Side)
6−3/4
(171)
GAS PIPING INLET
(Either Side)
CONDENSATE
TRAP CONNECTION
(Either Side)
4−7/8 (124) Right
2−1/4 (57) Left
ELECTRICAL INLET
(Either Side)
2−1/2
(64)
14−3/4
(375)
18-3/4 (476)
16
(406)
9/16
(14)
19−7/16
(378)
23
(584)
4
(102)
14
(356)
1 OPTIONAL
RETURN CUTOUT
(Either Side)
Up−Flow Only
AIR FLOW
1−15/16 (49)
5/8 (16)
C
3/4 (19)
1
23−1/2
(597)
3/4 (19)
4−1/4
(108)
Bottom Return
Air Opening
1
FRONT VIEW
Model No.
No
Bottom Return
Air Opening
SIDE VIEW
A
B
C
in.
mm
in.
mm
in.
mm
G51MP−24B−045
G51MP−36B−045
G51MP−36B−070
17−1/2
446
16−3/8
416
16
406
G51MP−36C−090
G51MP−60C−090
G51MP−48C−110
G51MP−60C−110
21
533
19−7/8
454
19−1/2
495
G51MP−60D−135
24−1/2
622
23−3/8
546
23
584
G51MP / Page 9
INSTALLATION CONFIGURATIONS
UP−FLOW
DOWN−FLOW
HORIZONTAL − RIGHT
AIR FLOW
VENT
PIPING
VENT
PIPING
HEAT
EXCHANGER
HEAT
EXCHANGER
BLOWER
BLOWER
AIR
FLOW
CONDENSATE
DRAIN
VENT
PIPING
HORIZONTAL − LEFT
CONDENSATE
DRAIN
BLOWER
VENT
PIPING
HEAT
EXCHANGER
HEAT
EXCHANGER
CONDENSATE
DRAIN
BLOWER
AIR
FLOW
AIR FLOW
NOTE − On up−flow and down−flow configurations, the vent piping and
condensate drain can be moved to the other side of the unit. Vent piping
and drain must be installed on the same side of the unit with each other
unless optional Condensate Trap Alternate Location Kit (up−flow only) is
used. On horizontal installations the drain must be located at the bottom
and the vent piping at the top.
CONDENSATE
DRAIN
OPTIONAL ACCESSORY DIMENSIONS − INCHES (MM)
RAB RETURN AIR BASE (Up−Flow Applications Only)
For use with B, C, and D size furnaces only
4
(102)
CONDENSATE
TRAP
14
(356)
AIR FLOW
14
(356)
(584)
Overall
(Maximum)
1
1 Minimum
11 (279)
2
Unit side return Maximum
14 (356)
air Opening
FURNACE
FRONT
5−5/8
(143)
7−1/4 (184)
17−1/2 (446) RAB−B (98M60)
21 (533) RAB−C (98M58)
24−1/2 (622) RAB−D (98M59)
1 23
4
(102)
OPTIONAL RAB
RETURN AIR BASE
(521)
Overall
(Maximum)
SIDE RETURN
AIR OPENINGS
(Either Side)
23 (584)
7/8
(22)
1 20−1/2
3/4
(19)
27−5/8 (702)
SIDE VIEW
FRONT VIEW
1
Both the unit return air opening and the base return air opening must be covered by a single plenum or IAQ cabinet.
Minimum unit side return air opening dimensions for units requiring 1800 cfm or more of air (W x H): 23 x 11 in. (584 x 279 mm).
The opening can be cut as needed to accommodate plenum or IAQ cabinet while maintaining dimensions shown.
Side return air openings must be cut in the field. There are cutting guides stenciled on the cabinet for the side return air
opening. The size of the opening must not extend beyond the markings on the furnace cabinet.
2 14 inches (356 mm) is the maximum size the height of the unit opening can be cut. This may interfere with the condensate drain
(if located on the same side of the unit as the opening).
To minimize pressure drop, the largest opening height possible (up to 14 inches) is preferred.
NOTE− Optional Side Return Air Filter Kits are not for use with RAB Return Air Base.
G51MP / Page 10
OPTIONAL ACCESSORY DIMENSIONS − INCHES (MM)
DOWN-FLOW ADDITIVE FLOOR BASE
1-1/2
(38)
SUPPLY
AIR
OPENING
DOWN
FLOW
FURNACE
19-13/16
(503)
21-13/16
(554)
27-1/4
(692)
1-1/2
(38)
B
1-1/2
(38)
Front Of Furnace
1-1/2
(38)
A
TOP VIEW
SIDE VIEW
DOWN-FLOW
ADDITIVE
FLOOR BASE
FLOOR
OPENING
22
(559)
C
Model No.
No
G51MP−24B−045
G51MP−36B−045
G51MP−36B−070
G51MP−36C−090
G51MP−48C−090
G51MP−60C−090
G51MP−48C−110
G51MP−60C−110
G51MP−60D−135
A
B
C
in.
mm
in.
mm
in.
mm
19−9/16
497
16−9/16
421
18−3/4
476
23−1/16
586
20−1/16
510
22−1/4
565
26−9/16
675
23−9/16
598
25−3/4
654
HORIZONTAL FILTER KIT
1-1/4 (32)
24−3/4
(629)
5/8
(16)
5/8
(16)
B
A
RETURN
AIR
OPENING
AIR FLOW
23−1/2
(597)
5/8
(16)
Catalog
Number
inch
mm
inch
mm
87L96
18
457
16−3/4
425
87L97
21
533
18−3/4
476
87L98
25
635
23−3/4
603
AIR FILTER
(Furnished)
5/8
(16)
SIDE VIEW
FRONT VIEW
G51MP / Page 11
DIMENSIONS − INCHES (MM) − FURNACE/COIL COMBINED DIMENSIONS
UP−FLOW POSITION
UP−FLOW POSITION
Uncased
(CX34 − cased only)
Cased
M d lN
Model
No
A
in.
A
B
40
(1016)
DOWN−FLOW POSITION
Furnace
Width
B
mm
in.
A
mm
in.
B
mm
in.
mm
CX34−18/24B−6F C33−24B
CX34−18/24C−6F C33−24C
16−1/2 419 56−1/2 1435 13−7/8 352 53−7/8 1368
CX34−25B−6F
C33−25B
19−1/2 495 59−1/2 1511 15−7/8 403 55−7/8 1419
CX34−30B−6F
CX34−30C−6F
C33−30B
C33−30C
20−1/2 521 60−1/2 1537 17−3/4 451 59−3/4 1467
CX34−31B−6F
C33−31B
23−1/2 597 63−1/2 1613 20−1/4 514 60−1/4 1530
CX34−36B−6F
C33−36B
24−1/2 622 64−1/2 1638 21−7/8 556 61−7/8 1572
CX34−36C−6F
C33−36C
24−1/2 622 64−1/2 1638 21−1/4 540 61−1/4 1556
CX34−38B−6F
C33−38B
24−1/2 622 64−1/2 1638
CX34−42B−6F
C33−42B
24−1/2 622 64−1/2 1638 21−7/8 556 61−7/8 1572
CX34−43B−6F
C33−43B
28−1/2 724 68−1/2 1740 26−1/4 667 66−1/4 1683
CX34−43C−6F
C33−43C
28−1/2 724 68−1/2 1740 25−3/4 654 65−3/4 1670
C33−44C
24−1/2 622 64−1/2 1638 21−1/2 546 61−1/2 1562
CX34−44/48B−6F C33−48B
24−1/2 622 64−1/2 1638 22−1/8 562 62−1/8 1578
CX34−44/48C−6F C33−48C
24−1/2 622 64−1/2 1638 21−1/2 546 61−1/2 1562
CX34−49C−6F
29−1/2 749 69−1/2 1765 28−1/2 724 68−1/2 1740
C33−49C
22
559
62
1575
CX34−50/60C−6F C33−50/60C 27−1/2 699 67−1/2 1715 24−3/4 629 64−3/4 1645
40
(1016)
Overall
Height
CX34−60D−6F
C33−60D
25−1/2 648 65−1/2 1664 24−3/4 629 64−3/4 1645
CX34−62C−6F
C33−62C
29−1/2 749 69−1/2 1765 30−5/8 778 70−5/8 1793
CX34−62D−6F
C33−62D
29−1/2 749 69−1/2 1765 28−3/4 730 68−3/4 1746
DOWN−FLOW POSITION
Coil Width
Model
Number
Coil
Height
Coil
Width
HORIZONTAL
B
A
G51MP / Page 12
Furnace
Width
Coil Height
Overall
Height
in.
mm
in.
mm
in.
mm
17−1/2
446
17−1/2
446
13−1/4
337
53−1/4 1353
CR33-30/36B−F 17−1/2
446
17−1/2
446
16−1/8
410
56−1/8 1426
CR33-30/36C−F
21
533
21
533
16−1/8
410
56−1/8 1426
CR33-48B−F
21
533
17−1/2
446
20
508
60
1524
CR33-48C−F
21
533
21
533
20
508
60
1524
CR33-50/60C−F 24−1/2
622
21
533
23−5/8
600
53−5/8 1362
CR33-60D−F
622
24−1/2
622
23−5/8
600
53−5/8 1362
CR33-24B−F
24−1/2
in.
mm
HORIZONTAL POSITION
40
(1016)
Model
Number
CH33−36B−2F
CH33−36C−2F
CH33−42B−2F
CH33−48C−2F
CH33−60D−2F
CH33−44/48B−2F
CH33−50/60C−2F
CH33−62D−2F
A
in.
B
mm
in.
mm
26−1/2 673 66−1/2 1689
31−1/2 800 71−1/2 1816
OPTIONAL ACCESSORY DIMENSIONS − INCHES (MM)
CONCENTRIC ROOF
TERMINATION APPLICATIONS
CONCENTRIC WALL
TERMINATION APPLICATIONS
FLASHING
(Not Furnished)
12 (305)
OUTSIDE
WALL
INTAKE
AIR
EXHAUST
AIR
EXHAUST
AIR
Minimum
Above Average
Snow
Accumulation
SHEET METAL STRAP
INTAKE
AIR
INTAKE
AIR
CLAMP
(Not Furnished)
(Clamp and sheet metal strap
must be field installed to support
the weight of the termination kit.)
12 (305)
Minimum
Above
Grade
CLAMP
ÉÉÉÉÉÉÉÉ
GRADE
71M80/69M29 − 2 inch (51 mm)
60L46 3 inch (76 mm)
See Installation Instructions for specific usage.
33−3/8 (848) − 71M80/69M29
38−7/8 (987) − 60L46
6−1/2
(165)
3−1/2 (89) − 71M80/69M29
4−1/2 (114) − 60L46
6
(152)
EXHAUST
AIR
INTAKE AIR
ELBOW
(Field Supplied)
TERMINATION
ASSEMBLY
(Furnished)
Outdoor Exhaust Accelerator
included with 71M80
(Required with −045−070 models)
WALL ASSEMBLY TERMINATION KIT − RING KIT
15F74 − 2 inch (51 mm)
See Installation Instructions for specific usage.
DIRECT VENT APPLICATION
NOTE − 12 in. (305 mm) minimum height above
average snow accumulation.
NON−DIRECT VENT APPLICATION
NOTE EXHAUST PIPE SHOWN
Kit Contains Enough Parts For Two Installations
NOTE 12 in. (305 mm) minimum height above
average snow accumulation.
12 in. (305 mm) maximum
without support
8 in. (203 mm)
minimum
12 in. (305 mm) maximum
without support
6 in. (152 mm)
maximum
G51MP / Page 13
OPTIONAL ACCESSORY DIMENSIONS − INCHES (MM)
DIRECT VENT APPLICATIONS
WALL TERMINATION KITS (CLOSE-COUPLE)
22G44 − 2 inch (51 mm)
44J40 − 3 inch (76 mm)
See Installation Instructions for specific usage.
If Intake and Exhaust Pipe is less than
12 in. (305 mm) above snow accumulation or other obstructions, field fabricated piping must be installed.
EXHAUST
AIR
12
(305)
INSULATION
(Not Furnished)
INTAKE
AIR
INTAKE
AIR
EXHAUST
AIR
5 (127)
2
(51)
5-1/2
(140)
ÉÉÉÉÉÉÉÉÉÉÉÉ
GRADE
12
(305)
12 (305)
Minimum
12
(305)
ABOVE GRADE
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
DIRECT VENT APPLICATIONS
WTK WALL ASSEMBLY TERMINATION KIT
WITH FIELD FABRICATION ABOVE
GRADE EXTENDED CLEARANCE
30G28 − 2 inch (51 mm)
81J20 − 3 inch (76 mm)
See Installation Instructions for specific usage.
GRADE
If Intake and Exhaust Pipe is less than
12 in. (305 mm) above snow accumulation or other obstructions, field fabricated piping must be installed.
EXHAUST
AIR
12
(305)
INSULATION
(Not Furnished)
INTAKE
AIR
EXHAUST
AIR
INTAKE
AIR
5
(127)
8 (203)
Minimum
5-1/2
(140)
ÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉ
GRADE
G51MP / Page 14
12 (305)
Minimum
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
12 (305)
Maximum
ABOVE GRADE
GRADE
BLOWER/WATTS DATA
G51MP−24B−045 PERFORMANCE (Less Filter)
External
Static
Pressure
i w.g.
in.
0.00
G51MP−36B−045 PERFORMANCE (Less Filter)
Air Volume / Watts at Different Blower Speeds
High
Medium−
High
Medium−
Low
Low
cfm Watts cfm Watts cfm Watts cfm Watts
1125
425
900
360
745
295
690
265
External
Static
Pressure
i w.g.
in.
0.00
Air Volume / Watts at Different Blower Speeds
Medium−
Medium−
Low
High
Low
cfm Watts cfm Watts cfm Watts cfm Watts
High
1555
630
1410
585
1190
520
1030
435
0.10
1115
410
905
350
760
285
695
260
0.10
1515
605
1385
555
1190
485
1020
415
0.20
1090
395
895
335
755
280
685
255
0.20
1470
580
1345
520
1170
455
1010
400
0.30
1060
380
880
325
740
270
675
250
0.30
1410
555
1310
495
1155
440
1000
385
0.40
1020
365
860
315
720
260
665
240
0.40
1350
535
1250
465
1120
410
980
360
0.50
970
345
835
300
700
255
640
230
0.50
1290
505
1205
450
1080
390
950
345
0.60
920
335
795
290
665
240
600
220
0.60
1220
485
1145
420
1020
365
905
320
0.70
860
315
730
270
620
230
565
215
0.70
1145
460
1080
400
975
345
860
300
0.80
760
295
665
250
560
215
510
200
0.80
1050
425
985
365
870
320
785
285
0.90
675
275
585
230
495
200
465
175
0.90
945
410
900
345
825
305
730
270
NOTES − Air volume based on bottom air return air. Actual air volume may vary on side return air applications.
G51MP−36B−070 PERFORMANCE (Less Filter)
External
Static
Pressure
i w.g.
in.
G51MP−36C−090 PERFORMANCE (Less Filter)
Air Volume / Watts at Different Blower Speeds
Medium−
Medium−
Low
High
Low
cfm Watts cfm Watts cfm Watts cfm Watts
High
External
Static
Pressure
i w.g.
in.
Air Volume / Watts at Different Blower Speeds
Medium−
Medium−
Low
High
Low
cfm Watts cfm Watts cfm Watts cfm Watts
High
0.00
1640 660
1415
575
1160
485
1005
410
0.00
1630 745
1360
635
1125
540
975
440
0.10
1600 635
1395
550
1160
460
1000
385
0.10
1620 715
1365
610
1160
515
1000
430
0.20
1540 605
1370
525
1160
445
995
375
0.20
1590 680
1365
580
1160
495
990
405
0.30
1495 580
1345
505
1145
425
990
365
0.30
1550 655
1355
565
1170
475
985
395
0.40
1420 545
1275
480
1125
395
965
345
0.40
1520 630
1330
545
1160
460
980
380
0.50
1360 525
1245
450
1080
375
945
325
0.50
1465 605
1300
515
1140
440
960
360
0.60
1275 490
1165
410
1025
350
900
305
0.60
1415 570
1250
490
1095
420
940
350
0.70
1170
465
1085
385
965
335
860
295
0.70
1350 545
1215
470
1065
400
905
335
0.80
1080 440
1010
360
865
310
775
270
0.80
1260 510
1140
440
1005
375
850
310
0.90
945
840
320
765
275
710
245
0.90
1165
1035
395
900
335
730
285
400
475
NOTES − Air volume based on bottom air return air. Actual air volume may vary on side return air applications.
External
Static
Pressure
in. w.g.
0.00
G51MP−48C−090 PERFORMANCE (Less Filter)
G51MP−48C−110 PERFORMANCE (Less Filter)
Air Volume / Watts at Different Blower Speeds
External
Static
Pressure
i w.g.
in.
Medium−
Medium−
Low
High
Low
cfm Watts cfm Watts cfm Watts cfm Watts
High
2180 930
1835
790
1520
630
1280
510
0.00
Air Volume / Watts at Different Blower Speeds
Medium−
Medium−
Low
High
Low
cfm Watts cfm Watts cfm Watts cfm Watts
High
2160 880
1880
755
1490
602
1235
485
0.10
2135 885
1825
750
1510
610
1275
495
0.10
2100 850
1855
730
1480
585
1230
475
0.20
2085 840
1810
720
1505
580
1270
475
0.20
2035 805
1815
690
1475
560
1225
460
0.30
2030 800
1775
685
1500
565
1265
460
0.30
1965 750
1755
650
1475
545
1220
445
0.40
1940 760
1735
650
1480
535
1250
440
0.40
1885 725
1715
625
1465
510
1215
430
0.50
1865 725
1660
600
1430
505
1215
425
0.50
1780 680
1630
580
1420
490
1150
400
0.60
1740 670
1590
575
1380
475
1175
410
0.60
1690 660
1550
550
1360
460
1110
380
0.70
1645 640
1475
520
1290
450
1105
375
0.70
1575 620
1410
505
1210
405
1035
350
0.80
1540 600
1340
465
1175
405
1020
355
0.80
1375 550
1230
450
1125
380
970
325
0.90
1335 540
1170
440
1070
375
950
330
0.90
1225 520
1120
415
1050
365
885
310
NOTES − All air data is measured external to unit without filter (not furnished − field provided).
Air volume based on bottom air return air. Actual air volume may vary on side return air applications.
G51MP / Page 15
BLOWER/WATTS DATA
NOTES − All air data is measured external to unit without filter (not furnished − field provided).
G51MP−60C−090 PERFORMANCE (Less Filter)
Air Volume / Watts at Different Blower Speeds
Bottom
Return
Air,
Side
Return
Air
with Optional RAB Single Side Return Air − Air volumes in bold require field
External
Return Air Base, Return Air from Both Sides or Return fabricated transition to accommodate 20 x 25 x 1 in. air
Static
filter in order to maintain proper air velocity.
Pressure − Air from Bottom and One Side.
in. w.g.
Medium−High Medium−Low
Low
High
Medium−High Medium−Low
Low
High
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
2840 1450 2345 1105 1895 900 1515 700 2835 1495 2340 1155 1800 895 1440 695
0.00
0.10
2765 1415 2365 1080 1950 885 1580 700 2785 1475 2345 1135 1805 865 1515 690
0.20
2695 1385 2345 1050 1985 870 1620 695 2715 1435 2275 1080 1825 845 1560 685
2605 1335 2315 1030 1990 850 1645 690 2620 1380 2260 1035 1840 825 1600 680
0.30
0.40
2530 1300 2265 990 1990 825 1665 675 2550 1350 2230 1015 1845 815 1620 670
0.50
2420 1260 2210 955 1970 800 1675 665 2450 1305 2175 990 1850 790 1615 655
2330 1220 2145 925 1930 775 1665 650 2365 1270 2130 940 1830 775 1615 640
0.60
0.70
2250 1190 2050 885 1875 745 1645 630 2240 1205 2070 915 1815 760 1595 620
0.80
2135 1140 2000 865 1810 715 1620 615 2185 1190 1965 865 1775 745 1555 605
2030 1090 1885 830 1720 685 1560 590 2015 1150 1820 820 1690 715 1440 580
0.90
G51MP−60C−110 PERFORMANCE (Less Filter)
Air Volume / Watts at Different Blower Speeds
Bottom
Return
Air,
Side
Return
Air
with Optional RAB Single Side Return Air − Air volumes in bold require field
External
Return Air Base, Return Air from Both Sides or Return fabricated transition to accommodate 20 x 25 x 1 in. air
Static
filter in order to maintain proper air velocity.
Pressure Air from Bottom and One Side.
in. w.g.
g
Medium−High Medium−Low
Low
High
Medium−High Medium−Low
Low
High
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
2720 1385 2410 1090 2055 935 1620 710 2625 1350 2310 1080 1885 885 1515 700
0.00
0.10
2665 1355 2385 1075 2025 885 1730 735 2570 1330 2325 1060 1910 865 1575 700
0.20
2585 1315 2350 1015 2030 865 1680 690 2410 1305 2285 1035 1930 845 1620 690
0.30
2505 1275 2290 990 2025 840 1695 675 2425 1265 2230 990 1925 825 1635 675
0.40
2435 1250 2235 940 2030 830 1695 660 2335 1220 2175 950 1910 810 1640 660
0.50
2350 1205 2170 930 1975 790 1735 665 2270 1195 2120 935 1895 785 1640 640
0.60
2255 1185 2100 895 1915 765 1720 650 2170 1155 2045 885 1860 765 1630 630
0.70
2160 1150 2005 840 1865 730 1680 635 2110 1130 1950 855 1795 730 1590 610
0.80
2020 1090 1905 825 1810 710 1625 610 2035 1090 1885 820 1745 705 1540 580
0.90
1910 1050 1820 795 1705 675 1540 590 1900 1055 1760 780 1665 680 1470 565
G51MP−60D−135 PERFORMANCE (Less Filter)
Air Volume / Watts at Different Blower Speeds
External Bottom Return Air, Side Return Air with Optional RAB Single Side Return Air − Air volumes in bold require field
Return Air Base, Return Air from Both Sides or Return fabricated transition to accommodate 20 x 25 x 1 in. air
Static
filter in order to maintain proper air velocity.
Pressure Air from Bottom and One Side.
in. w.g.
g
Medium−High Medium−Low
Low
High
Medium−High Medium−Low
Low
High
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
0.00
2730 1465 2425 1125 2055 915 1560 680 2665 1440 2325 1100 1865 890 1410 690
0.10
2670 1440 2400 1100 2065 890 1590 675 2615 1405 2310 1065 1915 865 1465 685
0.20
2600 1400 2365 1070 2045 865 1620 665 2530 1370 2280 1055 1925 850 1570 675
0.30
2525 1360 2315 1045 2035 845 1615 655 2470 1330 2235 1015 1920 825 1590 670
0.40
2445 1325 2260 1015 2020 820 1615 645 2380 1290 2175 985 1910 805 1590 655
0.50
2360 1280 2195 985 1960 790 1610 635 2310 1265 2120 965 1890 790 1595 645
0.60
2290 1255 2130 965 1900 755 1600 615 2200 1230 2055 935 1835 765 1580 630
0.70
2205 1220 2035 910 1825 730 1570 600 2120 1190 1970 900 1790 740 1545 605
0.80
2110 1195 1945 880 1765 710 1540 580 2025 1160 1890 875 1720 710 1515 590
0.90
1970 1120 1835 830 1680 690 1540 545 1930 1110 1800 835 1655 685 1440 570
G51MP / Page 16
Visit us at www.lennox.com
For the latest technical information, www.lennoxdavenet.com
Contact us at 1−800−4−LENNOX
NOTE − Due to Lennox’ ongoing committment to quality, Specifications, Ratings and Dimensions subject to change without notice and without incurring liability.
Improper installation, adjustment, alteration, service or maintenance can cause property damage or personal injury.
Installation and service must be performed by a qualified installer and servicing agency.
©2006 Lennox Industries Inc.

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