8
START UP & ADJUSTMENTS
Pre-Start Check List
√
Verify that the outdoor unit is installed according to all
instructions in this document.
√
Verify that the indoor unit is appropriate for use with the
refrigerant listed on the outdoor unit. And that it has the
proper design pressure for the outdoor unit equipment
type.
√
Verify the indoor unit and thermostat have been installed
in accordance with that equipment’s instructions.
√
Verify line voltage power leads are securely connected and
that both indoor and outdoor units are properly grounded.
√
Verify that the power supplied by branch circuits for both
the indoor and outdoor equipment is:
• the proper voltage for the equipment, and
• that the overcurrent protection device is properly
sized, and
• that the supply wiring is the correct gauge.
√
Verify that the low voltage and thermostat wiring are securely
connected to the proper terminals for all equipment.
√
Verify that the low voltage transformer has been properly
connected with that unit’s instructions.
√
Verify that the refrigerant line-set has been properly routed
between the units, connected appropriately, is properly
secured and protected from damage, and that it has the
correct piping insulation installed.
√
Verify that the refrigerant system and lines are leak free by
inspection with a leak detector or the soap-bubble method.
√
Verify that any attached indoor ducting has been properly
installed and sealed.
√
Verify that the indoor condensate drain line and trap are
properly installed and functioning.
√
Verify that all removable panels have been re-installed,
and all cabinet enclosures and fan guards are secure.
√
Verify that the air filters are clean and properly installed.
√
Verify that the thermostat is set to the stand-by, or off
setting. And the fan switch is set to automatic or off.
Start-Up Procedures
The thermostat's function mode should be set to OFF and
the fan mode should be set to AUTO. Close all electrical
disconnects to energize the system.
WARNING:
This unit is equipped with a crankcase heater.
Allow 24 hours prior to continuing the start up
procedures to allow for heating of the refrigerant
compressor crankcase. Failure to comply may
result in damage and could cause premature
failure of the system. This warning should be
followed at initial start up and any time the power
has been removed for 12 hours or longer.
Operating Temperatures
This equipment has been designed to operate for a large range
of ambient conditions, however: running the heat-pump in
heating mode, at higher than 70°F ambient temperatures may
require the use of a
Heat Pump Mild Weather Control Kit
.
If an application is expected to require heating operation during
mild ambient temperatures the systems liquid line pressures
should be inspected during these periods of operation. If the
liquid line pressure is 530 psig or greater, then the Heat Pump
Mild Weather Control Kit is required to be installed on the
system. Alternately, the control system could be configured
to utilize the emergency or auxiliary heating means in order
to maintain reliable system operation.
Air Circulation - Indoor Blower
1. Set the thermostat system mode on OFF and the fan mode
to ON.
2. Verify the blower runs continuously. Check the air delivery
at the supply registers and adjust register openings for
balanced air distribution. If insufficient air is detected,
examine ductwork for leaks or obstructions.
3. Set the thermostat fan mode to AUTO and verify the blower
stops running.
Short Cycle Protection
1. Set the thermostat system mode to COOL. Observe the
temperature setting of the thermostat and gradually raise
the set-point temperature until the unit de-energizes.
2. Immediately lower the set point temperature of the
thermostat to its original setting and verify that the indoor
blower is energized and outdoor unit remains de-energized.
3. After approximately 5 minutes, verify the outdoor unit
energizes and the temperature of the discharge air is
cooler than the room temperature.
System Cooling
1. Set the thermostat’s system mode to COOL and the fan
mode to AUTO. Gradually lower the thermostat temperature
setpoint below room temperature and verify the outdoor
unit and indoor blower energize.
2. Verify blower wheel is spinning in direction indicated by
arrow. 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.
3. Verify HI and LO refrigerant pressures.
4. Allow the system to operate for several minutes and then
set the temperature selector above room temperature.
Verify the fan and compressor cycle off with the thermostat.
NOTE:
The blower should also stop unless fan switch is
set to the ON position.
System Heating
1. Set the thermostat's system mode to HEAT and the
temperature mode to below room temperature.
2. Verify the outdoor unit and indoor fan stop running. After
5 minutes, increase the temperature on the thermostat to
it's maximum setting.
3. Verify the outdoor unit and indoor blower energize. 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.
Defrost Control Board Test Pins
• Verify the Status Indicator (on the control board) against
to determine proper
diagnostic description.
• Terminals ‘R’ and ‘C’ must have 18-30 VAC present between
them for proper board operation.
• Board anti-short cycle timer can be bypassed by shorting
the test terminals for less than 1 second while there is a
call for heating or cooling.
• Forced defrost enabled when shorting the test terminals for
more than three seconds while there is a call for heating
