Page 1
01/11
*2P0111*
506506−01
*P506506-01*
E 2011 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
INSTALLATION
INSTRUCTIONS
G61MPV SERIES UNITS
GAS UNITS
506506−01
01/2011
Supersedes 07/2010
Table of Contents
Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G61MPV Parts Arrangement 3. . . . . . . . . . . . . . . . . . . . .
Shipping and Packing List 4. . . . . . . . . . . . . . . . . . . . . . .
Safety Information 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Use of Furnace as Construction Heater 5. . . . . . . . . . .
General 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combustion, Dilution & Ventilation Air 6. . . . . . . . . . . . .
Installation − Setting Equipment 9. . . . . . . . . . . . . . . . . .
Filters 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Duct System 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pipe & Fittings Specifications 16. . . . . . . . . . . . . . . . . . .
Vent Piping Guidelines 19. . . . . . . . . . . . . . . . . . . . . . . . .
Joint Cementing Procedure 20. . . . . . . . . . . . . . . . . . . . .
Venting Practices 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Piping 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Integrated Control Board 45. . . . . . . . . . . . . . . . . . . . . . .
Unit Start−Up 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Pressure Adjustment 56. . . . . . . . . . . . . . . . . . . . . .
High Altitude Information 57. . . . . . . . . . . . . . . . . . . . . . .
Other Unit Adjustments 59. . . . . . . . . . . . . . . . . . . . . . . .
Service 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Control Board Diagnostic Codes 63. . . . . . . . .
Troubleshooting 64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair Parts List 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vent Pipe Sizing Worksheet 70. . . . . . . . . . . . . . . . . . . .
Start−Up & Performance Check List 71. . . . . . . . . . . . . .
WHAT TO DO IF YOU SMELL GAS:
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.
D Do not try to light any appliance.
D Do not touch any electrical switch; do not
use any phone in your building.
D Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
D If you cannot reach your gas supplier, call
the fire department.
FIRE OR EXPLOSION HAZARD.
Failure to follow safety warnings exact-
ly could result in serious injury, death,
or property damage.
WARNING
D Leave the building immediately.
Litho U.S.A.
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