AAON M3-094 - Manual (Page 60)

60
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
M3 Series air handlers can be shipped from
the factory with no controls and no wiring,
wired to terminal blocks, or with a factory
installed WattMaster VCM-X controller. If
the unit includes a VCM-X controller, the
technical guide will be included with the
literature package.
Operate
unit according to control
manufacturer’s instructions. Contact sales
representative or controls contractor for
information on non-factory controls.
Maintenance
Routine Maintenance
Routine maintenance is required to keep the
unit running efficiently and minimize down
time. The following maintenance schedule
should be used.
One week after start-up:
• Check filters for cleanliness. Replace if
necessary.
• Check cycling of fans and valves. Correct
unusual cycling.
• Check for correct damper operation.
• Check blower set screws. Tighten if
necessary.
Monthly:
• Check filters for cleanliness. Replace if
necessary.
• Check drain pans to ensure proper drainage
and clean as necessary.
• Inspect all coils. Clean if dirty or
obstructed in any way.
Seasonal:
• Check operation of heating and cooling
sequences.
• Check for correct damper operation.
• Check fans for wear. Clean if necessary.
Refer to motor manufacturer IOM for re-
lubrication schedule.
• Winterize coils if necessary.
• Inspect and if necessary clean unit interior.
Yearly:
• Clean coils, drain pan and drain line.
• Check electrical connections for tightness.
• Check piping and valves for correct
operation.
Blower Assembly
The M3 Series air handling unit uses only
direct drive fans. The only bearings that will
need to be lubricated are the ones contained
in the motor. Refer to the motor
manufacturer maintenance manual for the
correct re-lubrication schedule and lubricant
information.
It is important that fans be kept clean to
maintain efficiency and reduce stress on the
unit. To clean the fans first make sure the
power to the unit is turned off. Secure the
fan so it cannot free-wheel. Clean dust and
debris on the fan. Check set screws for
tightness. Rotate the fan by hand and check
for noise and roughness. The fan should
rotate smoothly.
Coils/Drain Pans
Coils must be kept clean to maintain peak
unit efficiency and capacity. Clean filters