10
On new installations, or if a major component has been
replaced, the operation of the unit must be checked.
Check unit operation as outlined in the following
instructions. If any sparking, odors, or unusual sounds
are encountered, shut o electrical power and recheck for
wiring errors, or obstructions in or near the blower motors.
The Startup, Adjustments, and Checks procedure provides
a step-by-step sequence which, if followed, will assure the
proper startup of the equipment in the minimum amount of
time. Air balancing of duct system is not considered part
of this procedure. However, it is an important phase of any
air conditioning system startup and should be performed
upon completion of the Startup, Adjustments, and Checks
procedure. The Startup, Adjustments, and Checks
procedure at outside ambients below 55°F should be
limited to a readiness check of the refrigeration system with
the required nal check and calibration left to be completed
when the outside ambient rises above 55°F.
If the unit is to be used for temporary heating or cooling, a
“Startup, Adjustments, and Checks” must rst be performed
in accordance with this manual. Damage or repairs due to
failure to comply with these requirements are not covered
under the warranty. the machines are used for
temporary heating or cooling, inspect the coils, fans, and
motors for unacceptable levels of construction dust and dirt
and install new lters.
The installing contractor must be certain that:
• All supply and return air ductwork is in place,
properly sealed, and corresponds with installation
instructions.
• All thermostats and sensors are mounted and wired
in accordance with installation instructions.
• All electric power, all gas, hot water or steam line
connections, and the condensate drain installation
have been made to each unit on the job. These
main supply lines must be functional and capable of
operating all units simultaneously.
• All lters are in place.
Inspect the roof curb for correct installation. The unit and
curb assembly should be level. Inspect the ashing of the
roof mounting curb to the roof, especially at the corners, for
good workmanship. Also check for leaks around gaskets.
Note any deciencies in a separate report and forward to
the contractor.
Remove any extraneous construction and shipping
materials that may be found during this procedure. Rotate
all fans manually to check for proper clearances and that
they rotate freely. Check for bolts and screws that may
have jarred loose during shipment to the job site.
Re-tighten if necessary. Re-tighten all electrical
connections.
Verify that all duct connections are tight and that there is no
air bypass between supply and return.
Remove lter section access panels and check that lters
are properly installed. Note airow arrows on lter frames.
It is important to your safety that the unit has been properly
grounded during installation. Check ground lug connection
in main control box for tightness prior to closing circuit
breaker or disconnect switch. Verify that supply voltage
on line side of disconnect agrees with voltage on unit
identication plate and is within the utilization voltage
range as indicated in Appendix B Electrical Data.
That nominal voltage value assigned
to a circuit or system for the purpose of designating its
voltage class.
That voltage assigned to a piece of
equipment for the purpose of designating its voltage class
and for the purpose of dening the minimum and maximum
voltage at which the equipment will operate.
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