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ELECTRIC WIRING
All electrical wiring must be done in accordance with the
National Electrical Code. The code needs to be legally
authorized in the area where the installation is being
made. The circuit protector device must be located in a
convenient place near the furnace. No lighter than
14 AWG wire should be used in the furnace power
supply circuit. All furnaces covered by this manual and
installed in the United States of America operate on
115 Volts, 60 Cycle, 1-Phase Alternating Current with a
20 amp circuit protector device.
WARNING: Turn off electric power at
circuit protector device before making
any line voltage connections.
WIRING THE FURNACE
The furnace wiring is provided in harness form.
Mount the 4 x 4 junction box on 7/8” diameter opening
on front of blower compartment. Secure with conduit
connector and locknut. For the blower motor, secure
with lead conduit and at least one screw. Connect
components as shown in wiring diagrams.
See Fig 22-23.
CAUTION: This furnace is not approved
for use with aluminum wire.
NOTE: 24 volt wires from the transformer to DS-103
control, from burner to DS-103, and from
thermostat to DS-103 need not be enclosed
in conduit unless required by local codes.
See Fig. 22-23.
DS-103 DAMPER CONTROL
The T&T terminals are connected to the T&T terminals
on the gas or oil burner. The R terminal is not used.
The C terminal is connected to the C terminal on the
24-volt transformer. Terminal 1 is connected to the
wood thermostat (smaller stat). Terminal 2 is connected
to the burner thermostat (larger stat). When Terminal 1
is energized by the wood thermostat, a relay on the
circuit board energizes a solenoid that opens a damper
that supplies air to the wood fire. When terminal 2 is
energized, it closes this damper and energizes the T&T
terminals, which in turn energizes the burner.
NOTE: Refer to the electrical drawings in the
Exploded View/Parts List Section for details.
23
HEADING
Installation
FIG. 22
FIG. 23
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To T & T terminals
Gas or Oil burner
To “W” on Programmable
Thermostat
To “W” on Digital Thermostat
To “C” on 24 volt Transformer
DS-103 Damper
Control
Electrical
Junction
Box
24 volt
Transformer
WOOD
GAS / OIL