AAON RL-240 - Manual (Page 55)

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4. Ensure that all vents to the atmosphere
are clean and free from obstruction.
5. Inspect and clean all drip legs in the gas
lines.
6. Inspect all electrical components,
connections and terminals. Clean and
tighten as necessary.
7. Clean ignition electrodes if necessary.
8. Put system back into operation and
observe the complete operation of the
burners through the full firing range.
There is an observation viewport
window in the gas piping compartment.
9. Observe the flame pattern and take any
necessary steps to correct any velocity
and/or air distribution problems.
10. Test the ignition spark and adjust gap if
necessary. Clean any carbon build-up on
ignition probes and troubleshoot for
cause.
11. Inspect all valves and piping for
operation and clean as necessary.
12. Inspect UV sensor observation window.
Clean any dust or debris present.
Inspection and Maintenance of Gas Ports:
1. Conduct an initial inspection within the
first month after commissioning.
Visually check the gas ports of new
burner assemblies for any piping scale or
debris. Use pin vise with drill bit to
remove (see below).
2. Annual inspections are normally
adequate once the initial piping debris is
removed. The operating conditions of
the burner will determine how frequently
the maintenance is actually required.
Figure 35 - Removing Piping Scale with Pin Vise
DX Cooling
Set unit controls to cooling mode of
operation with supply fans on. Check the
fans
for correct operating direction,
amperage and voltage. Check compressor
operation, rotation, amperage and voltage to
the unit nameplate (check the amperage on
the load side of the compressor contactor).