Only qualified service personnel shall perform installation and service.
5
3. Reconnect the three (3) furnace wiring harness leads to the terminal block
located on the blower scroll. For all furnace models:
•
Connect the red wire (cooling fan speed) to the terminal block labeled “H”.
•
Temporarily, connect the orange wire (heating fan speed) to the terminal
block labeled “L”.
•
Connect the white wire to the terminal block labeled “C”.
Refer to “Supply / Return Airflow and Air Temperature” section of the Crown
Oil-Fired Central Furnace Installation, Operation, and Service Manual with
Users Information Section for a procedure to select the heating fan speed.
4. Replace the blower access panel.
5. Restore electrical power to the furnace at the disconnecting switch and set
the room thermostat operating mode to “ON”.
6. Adjust the room thermostat to cause the furnace to operate through at least
one (1) complete heating or cooling cycle to test operation of the blower.
Setting the thermostat to the “FAN” or “FAN ON” position should cause the
blower to run continuously on high speed.
7. The blower should accelerate from rest to full speed within about ten (10)
seconds, or less. Blower operation should be smooth without clattering or
rattling noises. If blower operation generates unusual noises, check for loose
fasteners and parts in the furnace. Remove, tighten, or secure all loose parts.
Blower pulsation (sometimes called “hunting”) usually indicates the duct
system is too restrictive. Also, consult the furnace instruction manual for
blower troubleshooting steps.
8. Package the standard blower / motor assembly in the shipping carton for the
upgrade blower / motor assembly. Contact your dealer or distributor regarding
the possibility of returning the standard blower / motor assembly for credit
against your account.
