11
STARTUP & ADJUSTMENTS
Pre-Start Checklist
The following check list should be observed prior to
starting the unit.
√
Is the unit level? Unit should be level or slightly slanted
toward the drain for proper condensate drainage.
√
Is the unit installed with the proper clearances as listed
?
√
Is the wiring correct according to the wiring diagram
and electrical codes?
√
Are all the wiring connections tight? Check the condenser
fan to make sure it turns freely.
√
Is the overcurrent protection properly sized?
√
Is the thermostat wired correctly? Is it installed in a
proper location?
Start-Up Procedure
The control circuit consists of an anti-short cycle timer
that will not let the compressor start at power up before
five minutes have elapsed.
1. Set the system mode to OFF and the temperature mode
to its highest setting.
2. Turn power on at the disconnect switch.
3. Set the system mode to ON or COOL.
4. Set the temperature mode below room temperature.
Verify that the indoor blower, outdoor fan, and
compressor energize and the cooling function starts.
5. Verify the discharge air grilles are adjusted and the
system air is balanced.
6. Verify the duct work has no air leaks.
7. Verify the condensate drain is installed correctly and
functions properly.
8. Set the temperature mode above room temperature.
The unit should stop.
9. Instruct the homeowner on unit and thermostat operation
and filter servicing.
Air Circulation
Leave the thermostat system mode on OFF, and set the
fan mode to ON. Blower should run continuously. Check
the air delivery at the supply registers and adjust register
openings for balanced air distribution. Examine ductwork
for leaks or obstruction if insufficient air is detected.
Set the thermostat fan mode to AUTO. The blower should
stop running.
System Heating
Set the thermostat system mode to HEAT and the fan mode
to AUTO. Change the thermostat temperature selector
above the existing room temperature and check for the
discharge of warm air at the supply registers.
System Cooling
Set the thermostat’s system mode to COOL and the fan
mode to AUTO. Change the thermostat temperature
selector below the existing room temperature. Allow the
cooling system to operate for several minutes and check
for the discharge of cool air at the supply registers.
Short Cycle Protection
The control circuit is equipped with a time-delay feature
for protection against short cycling. With the system
operating in the cooling mode, gradually raise the
thermostat temperature setting until the system de-
energizes. Immediately lower the thermostat temperature
to the original setting and verify that the indoor blower is
energized. After approximately 5 minutes, the compressor
and the outdoor fan will energize.
Emergency Heat
1. Set the thermostat’s system mode to EM HT and the
fan mode to AUTO (intermittent air) or ON (continuous
air).
2. Set the thermostat’s temperature selector above the
existing room temperature and check the following:
• The thermostat auxiliary heat light (RED) is on.
• The compressor and the fan should not run; low
voltage circuit remains energized.
• The blower runs according to the thermostat’s fan
mode setting.
Forced Defrost Mode (Field Test)
• When the
TEST
terminals are shorted for more than 3
seconds, with the
Y1
input active and pressure switches
closed, the ACST will be eliminated and the compressor
contactor output energizes. The control will be placed
into a forced defrost mode.
NOTE:
The coil temperature sensor does not need to
be cold when the unit is forced into defrost.
• If the short across the TEST pins exist, the unit will stay
in DEFROST as long as the short remains or until the
TERMINATE TIME is reached (11 minutes). This will
happen regardless of coil temperature.
Anti Short Cycle Timer Test
The 5 minute time delay feature can be bypassed by
shorting the
TEST
pins together.
Heating Mode
When the
TEST
pins are shorted together for more than
1 second, the control will switch between defrost mode
and heating mode as described in the Forced Defrost
Mode procedure section.
Cooling Mode
When the
TEST
pins are shorted together for more than
1 second, the Anti Short Cycle Timer will be bypassed.
Содержание PPH3RF Series
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