ELECTRICAL CONNECTIONS
Make wiring connections to the unit as indicated on en- closed wiring diagram. As with all gas appliances using electrical power, this furnace shall be connected into a permanently live electric circuit. It is recommended that furnace be provided with a separate “circuit protec- tion device” in the electric circuit. The furnace must be electrically grounded in accordance with local codes or in the absence of local codes with the National Electri- cal Code, ANSI/ NFPA 70 or CSA C22.1 Electrical Code, if an external electrical source is utilized. The inte- grated furnace control is polarity sensitive. The hot leg of the 120V power supply must be connected to the black power lead as indicated on the wiring diagram. Provision for hooking up an electronic air cleaner and or humidifier is provided on the integrated control.
Refer to the SERVICE FACTS literature and unit wir- ing diagram attached to furnace diagram attached to furnace.
TWINNING FURNACES
These furnaces may be twinned. Twinning requires that two furnaces with the same configuration, capacity, and airflow must be used. They shall have common re- turns with equal pressure drops or ducts with equiva- lent lengths and sizes. See Field Wiring Diagrams for proper hookup.
Installer’s Guide
&
If upflow furnace is installed over a finished ceiling, overflow from the primary drain vent stack must flow into an auxillary drain pan to prevent damage to the finished ceiling below.
Primary drain vent stack 
must terminate below 
secondary heat exchanger condensate drain outlet.
To drain opening
B/C
FIELD WIRING DIAGRAM FOR 1 STAGE FURNACE
1 STAGE HEATING
USING A 1 STAGE HEATING THERMOSTAT
NO COOLING
FURNACE
SEE
NOTE 7
TWIN
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NOTE 6 | B/C |
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HUM SEE
NOTE 5
EAC SEE
NOTE 5
From drawing B341437 Rv 1
27 |