AAON M3-094 - Manual (Page 59)

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• Check for compliance of all codes and
special provisions.
• Attach all access panels, close all doors.
• Ensure that ductwork dampers are open.
Procedures
Install any gauges, voltmeter, and ammeter
before startup. If any excess sound or
vibration occurs during startup, note and
determine the cause, and shut off unit
immediately to correct.
1. Turn the unit power on.
2. One at a time turn on all blowers, check
for correct rotation. Units with factory
wiring have been tested. If motor rotation is
not correct, switch position of two legs of
power at the power entry. Rotation may
need to be corrected for each motor for field
wired units. Plenum fans should rotate
clockwise as viewed from the air leaving
side of the motor.
3. When rotation directions are correct, take
blower amp readings and check to make
sure they are within the safety factor of the
motor.
Figure 34 - Blower Rotation
4. With the blowers off, check the operation
of all dampers. Ensure that the dampers are
operating such that airflow through the unit
will not be shut off while the fan is
operating. This could cause severe damage
to the unit.
5. Check the operation of all water valves.
Simulate calls for cooling and heating,
check for the proper response of the valves.
Check the operation of any other optional
equipment
per the manufacturer’s
specifications.
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. 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
Improper startup procedures could
damage unit and possibly void
manufacturer’s warranties.
CAUTION
Startup check list must be completed
before turning unit power on.
WARNING