AAON M1-011 - Manual (Page 26)

26
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, such as a normal
residence, 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.
Air Balancing
High performance systems commonly have complex
air distribution and fan systems. Unqualified personnel
should not attempt to adjust fan operation, or air
circulation, as all systems have unique operating
characteristics. Professional air balance specialists
should be employed to establish actual operating
conditions, and to configure the air delivery system for
optimal performance.
Water Balancing
A hydronic specialist with a complete working
knowledge of water systems, controls, and operation
must be employed to properly balance the entire
system. Unqualified personnel should not attempt to
manipulate temperatures, pressures, or flow rates, as
all systems have unique operating characteristics, and
improper balancing can result in undesirable noises
and operation.
Controls
A variety of controls and electrical accessories may be
provided with the equipment.
Identify the controls on each unit by consulting
appropriate submittal, or order documents, and
operate according to the control manufacturer’s
instructions. If you cannot locate installation,
operation, or maintenance information for the specific
controls, then contact your sales
representative, or the
control manufacturer for assistance.
7. Operation & Maintenance
General
Immediately following building occupancy, the air
conditioning system requires a maintenance schedule
to assure continued successful operation. A
maintenance program similar to the example given
below should be scheduled for routine maintenance of
this equipment in order to provide continued efficient,
and reliable operation for the owner.
Maintenance Schedule
One week after start-up:
− Check refrigerant charge. Evacuate and repair
coil if leaking.
− Adjust belt tension on all fan drives.
− Check filters for cleanliness. Measure pressure
loss if applicable. Replace if necessary.
− Check cycling of compressors, fans, and valves.
Correct unusual cycling.
Monthly:
− Lubricate bearings if operating continuously at
1500 rpm, or higher, or in other extreme
conditions.
− Check cleanliness of filters, and replace if
necessary.
− Check cooling coil drain pan to assure proper
drainage.
− Inspect evaporator, and condenser coils. Clean if
dirty, or obstructed in any way.
Quarterly:
− Lubricate bearings if operating at 1000 rpm, or
less, and in temperatures less than 150 °F, or other
extreme conditions.
− Check damper operation for freedom of
movement. Correct any binding that may occur.
− Check belts, and pulleys on all fan drives for
tension, and unusual wear.
− Check operation of heating, and cooling section if
seasonal.
− Check inlet, and outlet air temperatures.
Determine cause for abnormal changes.
Annually:
− Clean the condenser, and evaporator coils with
steam, or a non-corrosive coil cleaner.
WARNING
Do not alter factory wiring. Deviation from the
supplied wiring diagram will void all warranties,
and may result in equipment damage or personal
injury. Contact the factory with wiring
discrepancies.