10
Cleaning
Due to the fact that drain pans in any air conditioning
unit will have some moisture in them, algae and fungus
will grow due to airborne bacteria and spores. Periodic
cleaning is necessary to prevent this build-up from plugging
the drain.
STARTUP, ADJUSTMENTS, AND CHECKS
WARNING
HIGH VOLTAGE!
To avoid personal injury or death
due to electrical shock, bond the
frame of this unit to the building
electrical ground by use of the
grounding terminal provided or
other acceptable means. Disconnect
all power before servicing or
installing this unit.
CAUTION
To prevent property damage or personal
injury, do not start the unit until all necessary
pre-checks and tests have been performed.
WARNING
MOVING MACHINERY HAZARD!
To prevent possible personal injury or death,
disconnect power to the unit and padlock in the
“OFF” position before servicing fans.
Pre-Startup Instructions
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 off electrical power and recheck for
wiring errors, or obstructions in or near the blower motors.
Duct covers must be removed before operating unit.
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 final check and calibration left to be completed
when the outside ambient rises above 55°F.
Temporary Heating Or Cooling
If the unit is to be used for temporary heating or cooling, a
“Startup, Adjustments, and Checks” must first be performed
in accordance with this manual. Damage or repairs due to
failure to comply with these requirements are not covered
under the warranty.
After
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 filters.
Contractor Responsibility
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 filters are in place.
Roof Curb Installation Check
Inspect the roof curb for correct installation. The unit and curb
assembly should be level. Inspect the flashing of the roof
mounting curb to the roof, especially at the corners, for good
workmanship. Also check for leaks around gaskets. Note any
deficiencies in a separate report and forward to the contractor.
Obstructions, Fan Clearance and Wiring
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 connectio
ns.
Field Duct Connections
Verify that all duct connections are tight and that there is no
air bypass between supply and return.
Filter Section Check
Remove filter section access panels and check that filters
are properly installed. Note airflow arrows on filter frames.
Pre-startup Precautions
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 identification plate and
is within the utilization voltage range as indicated in Appendix
B Electrical Data.
System Voltage -
That nominal voltage value assigned to a
circuit or system for the purpose of designating its voltage class.
Nameplate Voltage -
That voltage assigned to a piece of
equipment for the purpose of designating its voltage class
and for the purpose of defining the minimum and maximum
voltage at which the equipment will operate.