In Canada, installation must conform with current National Standard of Canada
In order to ensure proper unit operation in non−direct vent applications, combustion and ventilation air supply must be provided according to the current National Fuel Gas Code or
This furnace is CSA International certified for installation clearances to combustible material as listed on the unit nameplate and in the tables in figures 8, 13 and 17. Accessi- bility and service clearances must take precedence over fire protection clearances.
NOTE − For installation on combustible floors, the furnace shall not be installed directly on carpeting, tile, or other combustible material other than wood flooring.
For installation in a residential garage, the furnace must be installed so that the burner(s) and the ignition source are located no less than 18 inches (457 mm) above the floor. The furnace must be located or protected to avoid physical damage by vehicles. When a furnace is installed in a public garage, hangar, or other building that has a haz- ardous atmosphere, the furnace must be installed accord- ing to recommended good practice requirements and cur- rent National Fuel Gas Code or CSA B149 standard.
NOTE − Furnace must be adjusted to obtain a temperature rise within the range specified on the unit nameplate. Failure to do so may cause erratic limit operation.
This G61MP furnace may be used as a high−static unit heater. The G61MP may also be installed in an aircraft han- gar in accordance with the Standard for Aircraft Hangars (ANSI/NFPA No. 408−1990).
Installation in parking structures must be in accordance with the Standard for Parking Structures (ANSI/NFPA No. 88A−1991). Installation in repair garages must be in accor- dance with the Standard for Repair Garages (ANSI/NFPA No. 88B−1991).
This G61MP furnace must be installed so that its electrical components are protected from water.
When this furnace is used with cooling units, it shall be installed in parallel with, or on the upstream side of, cooling units to avoid condensation in the heating compartment. With a parallel flow arrangement, a damper (or other means to control the flow of air) must adequately prevent chilled air from entering the furnace. If the damper is manually oper- ated, it must be equipped to prevent operation of either the heating or the cooling unit, unless it is in the full HEAT or COOL setting.
When installed, this furnace must be electrically grounded according to local codes. In addition, in the United States, installation must conform with the current National Electric Code, ANSI/NFPA No. 70. The National Electric Code (ANSI/NFPA No. 70) is available from the following ad- dress:
National Fire Protection Association
1 Battery March Park
Quincy, MA 02269
In Canada, all electrical wiring and grounding for the unit must be installed according to the current regulations of the Canadian Electrical Code Part I (CSA Standard C22.1) and/or local codes.
NOTE − This furnace is designed for a minimum continu- ous return air temperature of 60°F (16°C) or an intermit- tent operation down to 55°F (13°C) dry bulb for cases where a night setback thermostat is used. Return air tem- perature must not exceed 85°F (29°C) dry bulb.
The G61MP furnace may be installed in alcoves, closets, attics, basements, garages, and utility rooms.
This furnace design has not been CSA certified for installa- tion in mobile homes, recreational vehicles, or outdoors.
Never use an open flame to test for gas leaks. Check all connections using a commercially available soap solution made specifically for leak detection.
Use of Furnace as Construction Heater
Lennox does not recommend the use of G61MP units as a construction heater during any phase of construction. Very low return air temperatures, harmful vapors and operation of the unit with clogged or misplaced filters will damage the unit.
G61MP units may be used for heating of buildings or struc- tures under construction, if the following conditions are met:
D The vent system must be permanently installed per these installation instructions.
DA room thermostat must control the furnace. The use of fixed jumpers that will provide continuous heating is not allowed.
DThe return air duct must be provided and sealed to the furnace.
DReturn air temperature range between 60°F (16°C) and 80°F (27°C) must be maintained.
DAir filters must be installed in the system and must be maintained during construction.
DAir filters must be replaced upon construction comple- tion.
DThe input rate and temperature rise must be set per the furnace rating plate.
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