Daikin RCS 06F - Maintenance and Operation

20 IM 962-2
Maintenance and Operation
Maintenance and Operation
IMPORTANT
Refrigerant Piping: A qualied Architect or Systems HVAC
Design Engineer familiar with refrigerant piping design, as
well as local codes and regulations, must provide refrigerant
piping design. The following manufacturer recommendations
serve as a general guide and should not replace a qualied
professional’s refrigerant piping system design.
IMPORTANT
Chilled Water Piping: A qualied Architect or Systems HVAC
Design Engineer familiar with piping design, local codes
and regulations, must provide piping design. The following
manufacturer recommendations serve as a general guide and
should not replace a qualied professional’s piping system
design.
• All access panels must be in place when unit is in
operation.
• For maximum efciency, the condenser coil must be
kept clean. Periodic inspections, depending on local
conditions are recommended. If it is necessary to clean
the condenser coil, use a common garden hose.
• Never operate the unit without filters installed in the
air handler.
Crankcase Heaters
All units are equipped with crankcase heaters that are factory
wired to operate whenever the main power supply to the unit
is “ON” and compressors are “OFF”. Before starting the
equipment after prolonged shutdown or at the time of initial
start-up, be sure that the circuits to the condensing units are
closed for at least 24 hours.
Contactor
The contactor is an electrical switch which operates the
compressor and condenser fans. Relay activates contactor
when safety circuit is made.
High Pressure Switch (HPC)
Opens the contactor circuit on high refrigerant pressure -
Manual Reset - check for cause of tripping before putting unit
back in service.
WARNING
Do not wire around the high pressure switch. 15 ton unit
compressors are not provided with internal pressure relief
means. Failure to follow this warning can cause an explosion
resulting in personal injury or death.
Low Pressure Switch (LPC)
Acts as safety against loss of refrigerant.
Relay (R)
Energizes the compressor contactor when safety circuit is
made.
Replacement Parts
To find your local Daikin Applied Certified Parts Distributor,
go to www.DaikinApplied.com and select Parts Locator.
Charge Information
Refer to the appropriate Charging Charts starting on page 21.
Wiring Diagrams
Refer to the appropriate Wiring Diagrams starting on page 27.
Troubleshooting
Refer to the troubleshooting chart Table 15 on page 18.