Startup Checks; Coil Maintenance - Daikin PreciseLine Series Installation And Maintenance Manual

Startup Checks

When performing startup and service, always take thorough
safety precautions. Start-up functions must be performed by
trained, experienced personnel.
DANGER
FAN MOTOR REQUIRES OVERLOAD PROTECTION
Failure to provide motor overload protection can result in fire, property
damage, electric shock, personal injury or death. Connect motor to an
overload protective device rated in compliance with local electric codes.
DANGER
FIRE/ELECTRIC SHOCK HAZARD
Can cause property damage, personal injury or death. Wire fan power
supply and ground motor frame in accordance with local electric codes.
WARNING
DO NOT OVERHEAT FAN MOTOR
High air temperatures the fan section can cause the fan motor to burnout.
On draw-through air handlers or air handlers with the fan section down the
air stream from the heating section, the discharge air temperature of the
heating section must not exceed 104°F (40°C).
WARNING
ROTATING FAN(S)
Can cause severe injury or death. Before servicing fans, lockout and tag
out power.
www.DaikinApplied.com
Before Starting the Unit
□ Make sure that fan electrical power source is disconnected
and locked in the OFF position before entering fan section.
□ With ductwork connected, check the unit for complete and
proper installation.
□ Check that all construction debris is removed and filters are
clean.
□ Check that all electrical work is complete and properly
terminated. Check that all electrical connections are tight
and that the proper voltage is connected. Phase imbalance
must not exceed 2%.
□ Fan motors are pre-lubricated and do not need grease
before startup.
□ Check that fan wheel(s) turn freely, are aligned properly
and do not rub against the fan housing(s), etc.
□ Leak test the thermal system to verify that connections are
tight.
□ Check that condensate drain is trapped and clear of debris.
□ Rotate shaft by hand to be sure it is free.
□ Fan startup: Fan should start and run. Verify fan rotation is
correct.
NOTE: 3-phase motor rotation may be reversed by reversing
two legs of the three-phase power at the motor.

Coil Maintenance

SHARP EDGES AND COIL SURFACES are a potential injury
hazard. Avoid contact with them.
Clean drain pan regularly so mold does not develop or water overflows
causing property damage.
105 IM 1267-7 • PRECISELINE AIR HANDLER
Startup Checks
WARNING
WARNING