AAON RM-030 - Manual (Page 7)

7
PERIODIC INSPECTION PROCEDURES Continued
COOLING
1.
Main Power Switches are on and power is to the unit.
2. Set thermostat in cooling mode and place the "fan"
switch to on. Check blower for correct operating
direction, amperage and voltage.
3. PACKAGED UNITS - Check compressor(s)
operation. Check the amperage and compare to the
nameplate data (check amperage load side of the
compressor contactor).
4. DX COIL UNITS - If applicable check remote con-
denser as per the manufacturer's recommendations.
5. CHILLED WATER UNITS - Check remote chiller
operations as per the manufacturers instructions.
Check coolant flow valves for correct operation and
settings.
HEATING • NATURAL GAS
1.
Before turning on the main electrical power switch,
be sure that all gas supply lines have been purged of
air.
2. Turn gas valve to "ON" position.
3. Turn main electrical power switch to "ON" and set
the thermostat to call for heat. The vent motor
should operate. The control will automatically
supply energy to the spark gap and the gas valve
after the thermostat contact closes.
4. The sensing probe detects the presence of the flame.
(Should no flame be detected in 10 seconds, the
ignition system will recycle. If no flame is detected
in 3 tries, the ignition system will lockout.)
5. Adjust thermostat to a low temperature setting to
open contacts. The main gas flames should be
extinguished.
NOTE: The evaporator blower is controlled by the
ignition system. In the fan "Auto" mode the blower
comes on 45 seconds after flame is proved and goes off
120 seconds after the thermostat opens.
HEATING • ELECTRIC
1.
Set thermostat in the heat mode.
2. Set thermostat to call for heat to engage all electric
heat strips. Check blower for proper rotation and
voltage.
3. Measure the amperage and voltage. Compare them
to the nameplate data.
HEATING • STEAM OR HOT WATER
1.
Set thermostat in the heat mode.
2. Check supply blower for proper rotation and voltage.
3. Check boiler or hot water operations according to the
manufacturer's instructions and recommendations.
4. Check control flow valves for correct operation and
settings according to the manufacturer's instruc-
tions and recommendations.
ELECTRIC, STEAM, HOT WATER, COOLING &
CHILLED WATER UNITS
1. Blower, coils and filters should be inspected monthly.
2. Once a year, before unit is turned on for the heating
season, a qualified service technician should inspect
the unit for proper operation.
3. All valves and steam traps should be inspected
according to the manufacturer's instructions and
recommendations.
WARNING: All of the items listed under the service,
trouble shooting and maintenance section of this manual
should be performed once a year.
▲
! WARNING
Electric shock hazard. Can cause injury or
death. Before attempting to perform any
service or maintenance, turn the electrical
power to unit to OFF at disconnect switch(es).
Unit may have multiple power supplies.