Installation guide

SEQUENCE OF OPERATION
A. CONTINUOUS FAN
Thermostat closes R to G.
G energizes Time Delay Relay (TDR).
Time Delay Relay (TDR) energizes Fan Relay (FR)
within 30 seconds.
When Fan Relay (FR) is energized, circuit is com-
plete to Indoor Blower Motor.
When G is de-energized, there is a 3 second delay
before Fan Relay (FR) opens.
B. COOLING MODE
Thermostat closes R to G, R to Y, and R to O (heat
pump only).
G energizes Time Delay Relay (TDR). Y energizes
Condense contactor, and O energizes the reversing
valve (heat pump only)
Time Delay Relay (TDR) energizes Fan Relay (FR)
within 30 seconds.
When Fan Relay (FR) is energized, circuit is com-
plete to Indoor Blower Motor.
When G is de-energized, there is a 3 second delay
before Fan Relay (FR) opens.
SAFE TY SWITCHES
Unit is equipped with a limit switch for each sepa-
rate heating element.
These switches are normally closed and are set to
open at 170 F.
Blower continues running until unit has cooled
enough (below set point) for switches to automati-
cally reset.
C. HEATING MODE
Thermostat closes R to W and R to G.
W closes the Heat Sequencer(s) to switch line volt-
age from Terminals 1 and 4 to Terminals 3 and 5,
which energizes the Heating Elements.
G energizes the Time Delay Relay (TDR).
Time Delay Relay (TDR) energizes Fan Relay (FR)
within 30 seconds.
When Fan Relay (FR) is energized, circuit is com-
plete to Indoor Blower motor.
When G is de-energized there is a 3 second delay.
CARE AND MAINTENANCE
The system should be regularly inspected by a qualified
service technician. Consult the servicing dealer for rec-
ommended frequency.
Between visits, the only consumer service recommended
or required is air filter maintenance and condensate drain
operation.
Air Filter
Air handlers are factory equipped with an air filter, tf the
return grille has its own filter, it is not recommended to
install a filter in the Air handler.
Inspect air filters at least monthly and replace or clean as
required. Disposable type filters should be replaced. Re-
usable type filters may be cleaned by soaking in mild de-
tergent and rinsing with cold water. Install filters with the
arrows on the side pointing in the direction of air flow.
Condensate Drain
During the cooling season check at least monthly for free
flow of drainage and clean if necessary.
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