Optional Equipment; Grounding; Startup & Adjustments; Pre - Start Checklist - Nordyne R-410A Installation And User Manual

Optional Equipment

Optional equipment requiring connection to
the power or control circuits must be wired in
strict accordance with current provisions of the
NEC (ANSI/NFPA 70), with applicable local
codes having jurisdiction, and the installation
instructions provided with the equipment.
Optional Equipment (low ambient control,
hard start kits, etc.) should be installed in strict
accordance with the manufacturer's installation
instructions.

Grounding

WARNING:
The unit must have an uninterrupted or
unbroken electrical ground to minimize
personal injury if an electrical fault
should occur. This ground may consist of
electrical wire or approved conduit when
installed in accordance with national or
local codes.
STARTUP AND 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 wiring correct according to the wiring
diagram and electrical codes?
Inspect wiring for evidence of open, shorted,
and/or improperly wired circuits.
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?
Verify air fi lters are clean and in place prior to
operating the equipment.
Verify the outdoor coil and top of the unit are
free from obstructions and debris, and all
equipment access/control panels are in place.

Thermostat

Set the thermostat's system mode to OFF, the
fan mode to AUTO, and adjust the temperature
setpoint to its highest setting.

Outdoor Unit

Prior to applying electrical power to the outdoor
unit, verify that the unit has been properly and
securely grounded, and that power supply
connections have been made at both the facility
power interface and outdoor unit.
FUNCTIONAL CHECKOUTS
CAUTION:
These units have a crankcase heater
factory installed. Wait 24 hours prior to
performing a function checkout to allow
for heating of the compressor crankcase.
Failure to comply may result in damage
and could cause premature failure of
the system.

Cooling

Gradually lower the thermostat temperature
setpoint below the actual room temperature
and observe that the outdoor unit and indoor
blower energize. Feel the air being circulated
by the indoor blower and verify that it is cooler
than ambient temperature. Listen for any unusual
noises. If unusual sounds occur, determine the
source of the noise and correct as necessary.

Heating

If heating equipment (furnace, air handler) is
provided with the system, lower the thermostat
setpoint temperature to the lowest temperature
setting and change the thermostat's function
mode to HEAT. The outdoor unit should stop
running and the indoor blower will shut off after the
preprogrammed delay. Increase the thermostat's
setpoint temperature to the maximum setting.
Verify the heating equipment and the indoor
blower energize after a short period of time. Feel
the air being circulated by the indoor blower and
verify that it is warmer than ambient temperature.
Listen for any unusual noises. If unusual sounds
occur, determine the source of the noise and
correct as necessary.
NOTE: Other heating sources (electric furnace,
fossil fuel furnace, air handler with electric
heat options, etc.) that interface with the air
conditioner should be functionally checked to
verify system operation and compatibility. Refer
to the installation instructions for this equipment
and perform a functional checkout in accordance
with the manufacturer's instructions.

Indoor Blower

1. Turn the fan mode to ON. Verify that the
indoor blower is operating and that airfl ow is
not restricted.
2. Set the fan mode back to AUTO. Blower will
operate at a decreased speed on continuous
fan.
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