Startup & Adjustments; Pre-Start Checklist; Start-Up Procedure; Air Circulation - Nordyne P5RF-X24K Installation Instructions Manual

START UP & ADJUSTMENTS

Pre-Start Checklist

The following check list should be observed prior to
starting the unit.
√ Verify the unit is level and allows proper condensate
drainage.
√ Verify the outdoor coil and top of the unit are free from
obstructions and debris, and all equipment access/
control panels are in place. Unit must be installed with
the proper clearances as listed in Figure 1 (page 4).
√ Verify that the duct work is sealed to prevent air leakage.
√ Verify that the line voltage power leads are securely
connected and the unit is properly grounded. Check
the condenser fan to make sure it turns freely.
√ Verify the thermostat is wired correctly and installed
in a proper location. Make sure the low voltage wires
are securely connected to the correct leads on the low
voltage terminal strip.
√ Verify that the power supply branch circuit overcurrent
protection is sized properly.

Start-Up Procedure

NOTE: The control circuit thermostat may consist of an
anti-short cycle timer that will not let the compressor re-
start before 3 - 5 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. If air is insufficient,
examine the ductwork for leaks or obstructions. Set the
thermostat fan mode to AUTO. The blower should stop
running.

System Cooling

Change the thermostat's system mode to COOL and
the fan mode to AUTO. Set 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.
10
System Heating
(Available only when Electric heat is supplied)
1. Set the thermostat's system mode to HEAT and the
fan mode to either AUTO (intermittent air) or to ON
(continuous air).
2. Set the thermostat's temperature selector above existing
room temperature:
3. Allow the system to operate for several minutes and
check the supply registers for warm air.
4. Verify the outdoor AC compressor and fan are not
running. NOTE: The indoor blower will run according
to the thermostat's fan mode setting.

Adjustment of Refrigerant Charge

CAUTION:
Packaged AC units contain liquid and gaseous
refrigerant under pressure. Adjustment of
refrigerant charge should only be attempted
by qualified, trained personnel thoroughly
familiar with the equipment and safe responsible
refrigerant handling procedures. Under no
circumstances should the homeowner attempt
to install and/or service this equipment. Failure
to comply with this warning could result in
equipment damage, personal injury, or death.
• To achieve rated capacity and efficiency the compressor
must be exposed to refrigerant for at least 24 hours
prior to running. After unit startup, the compressor must
run for a minimum of 12 hours.
• The refrigerant charge can be checked and adjusted
through the service ports provided external to the
unit. Use only gage line sets which have a "Schrader"
depression device present to actuate the valve.
Charging an R-410A Unit in AC Mode with Outdoor
Temperatures Above 55° F
1. With the system operating in a steady-state, measure
the liquid refrigerant pressure (in psig) at the service
valve.
2. Measure the liquid refrigerant temperature (° F) at the
service valve.
3. For the temperature measured, determine the required
liquid refrigerant pressure from your units label or
charging charts (Figures 8 - 11, pages 13 - 14).
• If the pressure measured in step 1 is greater than
the required liquid refrigerant pressure determined
in step 3, there is too much charge in the system.
Remove refrigerant and repeat steps 1 - 3 until the
system is correctly charged.
• If the pressure measured in step 1 is less than the
required liquid refrigerant pressure determined in
step 3, there is too little charge in the system. Add
refrigerant and repeat steps 1 - 3 until the system is
correctly charged.