Hamilton
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Canal
Winchester,
OH
76106
61MH0028A
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17
6.
Turn on
all
electrical supply circuits to the furnace at
the main service (House Circuit Breaker) panel.
Figure 23: Constant Torque Motor Terminals
Replacing the Blower Motor
1.
Turn off all electrical supply circuits to the furnace at
the main service panel.
2.
Remove furnace front door and switch furnace circuit
breaker(s) to “OFF”
3.
Disconnect the plastic wire plug that has the wires
that go to the motor terminals from the control box.
4.
Remove the screws on the right side of the blower
mounting plate.
5.
Slide the blower out of the blower compartment and
set on the floor.
6.
Remove the wires from the terminals.
7.
Remove the blower motor from the mounting bracket
by removing the screws on the sides of the blower
that secure the blower to the bracket.
8.
Insert the new blower motor into the blower
mounting bracket and insert the screws.
9.
Connect the wires to the same terminals on this motor
that they were connected to on the motor that was
removed.
10.
Slide the blower assembly into the blower deck and
insert the screw on the mounting bracket.
11.
Connect the pin plug to the mating pin plug on the
control box.
12.
Switch the circuit breakers to ON and replace furnace
front door.
13.
Turn on all electrical supply circuits to the furnace at
the main circuit panel (House Circuit Breaker.)
14.
Set the thermostat to the desired temperature.
Figure 24: Blower Assembly and Blower Deck
SECTION XI: FINAL SYSTEM
CHECKOUT
1.
Refer to appropriate wiring diagram and recheck all
wiring connections. Ensure that all wiring
connections are tight.
2.
Check blower motor connectors for proper
connection.
3.
If the control box cover is removed; reinstall control
box cover.
4.
Switch circuit breaker(s) to “ON” position.
5.
Switch the furnace circuit breakers in the main
service panel (House Circuit Breaker) to the ON
position.
6.
Set the blower selector switch to the ON position and
check all of the duct connections for air leaks. Seal
any leaks found.
7.
Set the blower selector switch to the AUTO position.
8.
Set the thermostat above the room temperature to
check for proper operation of the electric heaters.
9.
Set the thermostat to the desired temperature.
Airflow Guidelines for Proper Heating Operation:
The heating airflow is determined by the number of heaters
and the furnace temperature rise. The rule of thumb for
electric heaters is 65 CFM per kW of electric heat for cooling
and 110 CFM per kW of electric heat for heat pump. Check
the CFM Tables in the Users Information and Service and
Maintenance Manual.
Thermostat Heat Anticipator
Some thermostats have a heat anticipator setting that must be
set to the settings shown below in order to function correctly.
If the heat anticipator setting is too low the furnace will short
cycle.
