7. START-UP PROCEDURES
CHECK BEFORE STARTING
1. Check that the blower motor speed terminal block is
running the correct heating and cooling speeds.
2. Check to see that clean, properly sized air filters are
installed.
3. Replace all service access panels.
Check the unit's operation as outlined in the following
instructions. If any unusual sparking, odors or unusual
noises are encountered, shut off electric power
immediately. Recheck for wiring errors, or obstructions in or
near blower motors.
1. Set thermostat Heat-Cool selector to OFE
2. Set thermostat fan switch to AUTO.
3. Turn electric power ON. Nothing should start running.
4. Set thermostat fan switch to ON,
5. Reset thermostat fan switch to AUTO,
8. Sequence of OPERATION
ELECTRICAL SHOCK HAZARD.
operation. When heating demand is met, W3 and W2
sequentially de-energize shutting the indoor fan and the
electric heater.
Heating Operation (048 - 054):
With a call for heating (W2), the auxiliary electric heater is
energized along with the Indoor blower. Ifthe demand is not
met, W3 is energized incase of staged heating. When
heating demand is satisfied, W3 and W2 sequentially
de-energize along with the indoor fan blower.
Continuous Fan:
With the continuous Indoor fan option selected on the
thermostat, G is continuously energized. Incase of 024 -
042 units, the selected airflow setting is provided. In the
case of 048 and 060 units, the system runs low stage (Y1)
airflow for continuous fan operation.
9. MAINTENANCE
MONTHLY MAINTENANCE AND INSPECTION
CHECKS
Air Filters
Failure to follow this warning could result in personal
injury, death and/or property damage.
Turn off electric power supply at disconnect switch or
service panel before removing any access or service
panel from unit.
Cooling Operation (024 - 042):
With a call for cooling (Y), the indoor fan energizes
immediately whereas the contactor energizes after a 5
minute time delay (incase of an initial start up) starting the
compressor and the outdoor fan motor. When the cooling
demand is met, (Y) de-energizes, shutting the compressor,
indoor fan and the outdoor fan.
Cooling Operation (048 - 054):
These units utilize a 2 stage indoor thermostat. With a first
stage call for cooling (Y1), the indoor fan (low stage)
energizes immediately whereas the contactor energizes
after a 5 minute time delay (incase of an initial start up)
starting the compressor (low stage) and the outdoor fan
motor. If the low stage operation cannot satisfy the cooling
demand, the second stage cooling (Y2) energizes
switching the compressor into high stage cooling through
energizing an internal solenoid valve inside the scroll
compressor and switching the indoor fan into high stage.
When second stage cooling is satisfied, Y2 de-energizes
switching the compressor and the indoor fan into low stage
cooling. When the low stage cooling demand is met, Y1
de-energizes shutting the compressor, indoor fan and the
outdoor fan.
Heating Operation (024 - 042):
With a call for heating (W2), the auxiliary or electric heat
energizes along with the Indoor blower. Incase of staged
heating, W3 is energized if the demand is not met. The
highest airflow selected is run while the electric heat is in
REDUCED EQUIPMENT LIFE HAZARD
Failure to follow this cautions may result in damage to
the unit being installed.
Do not operate the unit without a filter.
Inspect filters at least monthly and replace or clean as
required. Washable filters may be cleaned by soaking in
mild detergent and rinsing with cold water. Replace filters
with the arrows on the side pointing in the direction of air
flow. Dirty filters are the most common cause of inadequate
heating or cooling performance, and of compressor
failures.
COOLING SEASON CHECKS (MONTHLY)
Condenser Coil
Keep the condenser inlet and outlet area clean and free of
leaves, grass clippings or other debris. Grass should be
kept short in front of the condenser inlet. Shrubbery MUST
be trimmed back so it is no closer than 30 inches to unit.
Condensate Drain
Check for condensate drainage. Clean as required.
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