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_ 2007 Lennox Industries Inc.
Dallas, Texas, USA
INSTALLATION
INSTRUCTIONS
G71MPP SERIES UNITS
GAS UNITS
Technical
50&334M
03/2008 J LJ _,Publications
Litho U.S.A.
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
Unit Dimensions ............................... 2
G71MPP Parts Arrangement ..................... 3
Shipping and Packing List ....................... 4
Safety Information .............................. 4
General ....................................... 6
Installation - Setting Equipment .................. 6
Filters ........................................ 12
Duct System .................................. 13
Pipe & Fittings Specifications ................... 13
Vent Pipe Sizing Worksheet .................... 14
Vent Piping Guidelines ......................... 15
Joint Cementing Procedure ..................... 16
Venting Practices ............................. 17
Gas Piping ................................... 25
Electrical ..................................... 27
Integrated Control ............................. 33
Blower Motor Performance ..................... 40
Unit Start-Up ................................. 51
Gas Pressure Measurement .................... 52 ,
High Altitude Information ....................... 53
Other Unit Adjustments ........................ 54
Heating Sequence of Operation ................. 55
Service ...................................... 57
Ignition Control Diagnostic Codes ............... 59
Troubleshooting ............................... 60
Repair Parts List .............................. 66
Start-Up & Performance Check List .............. 66
AWARNING
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other ap-
pliance.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Leave the building immediately.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call
the fire department.
03/08
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