Copperconductorsshallbeused.Linevoltagewiresshouldbe
sizedfortheinputampsstatedontheratingplate.Furnacemust
beconnectedtoitsownseparatecircuit.
Thermostat
Thermostat location has an important effect on the operation of
the unit. Follow instructions included with thermostat for correct
mounting and wiring.
Low voltage connections to furnace must be made on terminal
board to fan control.
If cooling is used, the Y from the thermostat must be connected to
the control board Y to energize cooling blower speed.*
Set thermostat heat anticipator in accordance with the Technical
Support Manual.
* "Y" terminal on thermostat sub-base must be connected to "Y"
terminal on furnace fan timer for proper fan speed during opera-
tion in air conditioning mode.
Optional Equipment
All wiring from furnace to optional equipment MUST conform to
local codes or, in the absence of local codes, the applicable na-
tional codes. Install wiring in accordance with manufacturer's
instructions.
Humidifier/ElectronicAir Cleaner
The furnace is wired for humidifier and/or electronic air cleaner
connection.
Electrical Connections
(Upflow/horizontal)
115v,60Hz
I
NEUT.
Connection Box
Ground
Low Voltage
Terminal Board
E,ectrica,Connections
(Downflow)
115V, 60Hz
NEUT.
Ground
LowVoltage
TerminalBoard
25-21-05b
CAUTION
Do NOT exceed 115V/0.8 amp. maximum current load
for both the EAC terminal and the HUM terminal com-
bined.
NOTE: The humidifier will be powered when the furnace is fired
and the circulating air blower comes on. The electronic air cleaner
will be powered anytime the thermostat calls for air movement.
However, the electronic air cleaner is NOT energized during con-
tinuous fan operation controlled by the electronic fan control.
Control Center Fuse
The 24V circuit contains a 5-amp, automotive-type fuse located
on control center. (See Figure 14) Any electrical shorts of 24V
wiring during installation, service, or maintenance may cause
fuse to blow. If fuse replacement is required, use only a fuse of
identical size (5 amp.)
Fan Timer Connections
Fuse
441 012308 01 [_
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