AAON M2-036 - Manual (Page 69)

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7. Check all high and low voltage
wiring connections for correctness
and tightness.
8. Check unit for correct incoming
voltage per the data plate.
9. Check the security of the locking
system on all blower bearings
10. Turn the unit power on.
11. Turn the unit blower on and check
for correct rotation.
12. If correct, take blower amp readings
and compare to see if the amp draw
is within the safety factor area of the
motor. Once correct, turn blower
off.
13. Turn on the first stage of heating
− Check amp draw of each
element of each stage
− Ensure blower started w/
electric heat
− Check for temperature rise
across heating section while
all stages are on
− If temperature rise is within
range, turn all heating calls
off
− Check to see that blower
stops
Refrigerant (DX) Cooling Section
Procedures:
1. Perform final visual inspection.
Check all equipment, ductwork, and
piping to verify that all work is
complete, and equipment is properly
installed and mounted. Improperly
installed equipment, or ductwork can
affect readings.
2. Perform condenser start-up checks in
addition to these air handler checks
according to the condenser
manufacturer’s instructions.
3. Ensure there is no construction
debris in the unit.
4. Check the unit for external damage.
5. Note all accessories installed.
6. Ensure that drain P-trap is properly
installed.
7. Check all terminal blocks, fuses, fuse
blocks, and contactors for
correctness.
8. Check all high and low voltage
wiring connections for tightness.
Check unit for correct incoming
voltage per the data plate.
9. Check the security of the locking
system on all blower bearings
10. Turn the unit power on.
11. Turn the unit blower on and check
for correct rotation.
12. If correct, take blower amp readings
and compare to see if the amp draw
is within the safety factor area of the
motor.
13. Check and record ambient
temperature.
14. Check for Guaranteed Off Timers
(GOT) and Time Delay Relays
(TDR).
15. Start the first stage cooling circuit
and blower circuit.
16. After all stages of cooling have been
on for at least five minutes, record
the return air temperature and supply
air temperature.
17. Check the temperature difference
across the evaporator coil.
Commissioning
The commissioning of an air conditioning
system is the process of achieving,
verifying, and documenting the performance
of that system to meet the operational needs
of the building. This may not be a formal
process in smaller structures, but some form
of owner acceptance will occur.
Adjustments made during the
commissioning phase may include air or
water balancing, or configuration of controls
and operational sequences.