Daikin DFC Series, Installation Instructions Manual

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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 ac -
ceptable 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 test 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.
Heating Startup
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.
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 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.
• Clean Air 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. Retighten if necessary. Re-tighten all electrical connections.
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 prop -
erly 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 discon -
nect 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 C 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 equip -
ment 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.
Utilization Voltage - The voltage of the line terminals of the equip -
ment at which the equipment must give fully satisfactory perfor -
mance. Once it is established that supply voltage will be maintained
within the utilization range under all system conditions, check
and calculate if an unbalanced condition exists between phases.
Calculate percent voltage unbalance as follows: