AAON HB-005 - Manual (Page 24)

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excessive sound, or vibration. Follow procedures
outlined below to start each piece of equipment.
Before powering on, or starting the unit:
1. Check the unit for external damage.
2. Note all accessories installed.
3. Ensure all field and factory high and low
voltage electrical connections are correct, and
tight.
4. Check all terminal blocks, fuses, fuse blocks,
and contactors for correctness
5. Open all access panels, and remove all
shipping screws, or restraints.
6. Remove any debris that may have been left.
7. Ensure electrical supply matches the unit
nameplate.
8. Ensure condensate lines are connected and
glued.
9. Install air filters of the proper size and type.
10. Check local codes for any special provisions.
11. Replace, and/or close all access panels.
12. Ensure that return, and/or supply dampers in
ductwork are open.
13. Check all equipment, ductwork, and piping to
verify that all work is complete, and equipment
is properly installed and mounted.
Start-Up
DX Cooling:
1. Ensure that drain P-trap is installed.
2. Turn the unit power on.
3. Turn the unit blower on, and check for correct
rotation.
4. If correct, take blower amp readings, and
compare to see if the amp draw is within the
safety factor area of the motor.
5. Check and record ambient temperature.
6. Start the first stage cooling circuit, and blower
circuit.
7. After all stages of cooling have been on for at
least five minutes, record the return air
temperature, and supply air temperature.
8. Check the temperature difference across the
evaporator coil.
9. If equipped with an economizer, after testing
of cooling circuits is complete, turn cooling
circuits off, and leave blower running.
10. Call for the economizer circuit to operate.
11. Check for economizer blades to open fully with
no binding.
Gas Heating:
1. Ensure that gas lines have been purged of air
– wait 5 minutes after purging to allow gas to
clear before continuing with startup.
2. Turn the unit power on.
3. Turn the unit blower on, and check for correct
rotation.
4. 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.
5. Check gas input and manifold pressure, and
adjust if necessary.
6. Turn on the first stage of heating.
7. Check to see that induced draft motor starts.
8. Check to see that main burner lights within 5
seconds of the heating call.
9. Ensure blower started after burner ignition.
10. Observe burner flames for light blue color, and
even flames across burner (propane flames
will have yellow tips).
11. Check temperature rise across heating section
while all stages are on.
12. If temperature rise is within range, turn all
heating calls off.
13. Check that blower stops after heat turns off
Failure to adhere to the following start-up
procedures will void all manufacturer’s warranties.
NOTE
IMPORTANT FOR 3 PHASE UNITS ONLY!
CHECK COMPRESSOR FOR PROPER
ROTATION BY STARTING UNIT ONLY AFTER
CONNECTING PRESSURE GAUGES TO
SUCTION AND DISCHARGE LINES. SCROLL
COMPRESSORS WILL BE DESTROYED IF
OPERATED IN THE WRONG DIRECTION.
CAUTION
Completed factory test sheets are in the equipment
literature packet shipped inside the unit. Factory
run-test readings recorded on the test sheets may
be helpful to reference during start-up.
NOTE