Advertisement
PILOT FLAME
BURNER FLAME
Step 4—Pilot Assembly
Check the pilot assembly and clean if necessary at the beginning of
each heating season. The pilot flame should be high enough for
proper impingement of the ignition electrode/flame sensor and to
light the burners. Remove any accumulation of soot and carbon
from the flame sensor. Check spark ignition electrode gap. (See
Fig. 3, 4 and 5.)
Step 5—Electrical Controls and Wiring
NOTE:
There may be more than 1 electrical supply to the unit.
Refer to Fig. 6 for field application wiring and Fig. 7 for unit
wiring. With power disconnected to the unit, check all electrical
connections for tightness. Tighten all screws on electrical connec¬
tions. If any smokey or burned connections are found, disassemble
the connection, clean all parts, strip wire, and reassemble properly
and securely.
Reconnect electrical power to the unit and observe unit through 1
complete operating cycle. Electrical controls are difficult to check
without proper instrumentation. A good voltmeter is needed to
check for correct operation of controls and wiring.
If the furnace fails to operate, check the following items before
calling for service:
1. Is the thermostat set correctly to "call for heat?"
2. Are the electrical and gas supplies ON?
3. Are the filters clean?
Refer to the Trouble Analysis chart in this manual for further
information.
__
FIELD 24-VOLT WIRING
___FIELD 115-, 208/230-, 460-VOLT WIRING
TERMINAL
BLOCK
NOTES:
1. CONNECT Y-TERMINAL AS SHOWN FOR PROPER COOLING OPERATION.
2. IF ANY OF THE ORIGINAL WIRE, AS SUPPLIED, MUST BE REPLACED,
USE SAME TYPE OR EQUIVALENT WIRE.
3. PROPER POLARITY MUST BE MAINTAINED FOR 115-VOLT WIRING.
Fig. 6-rHeating and Cooling Application Wiring Diagram
A91338
Advertisement
