Installation and Commissioning Guide
Variable Capacity Commercial
53
Installation and Commissioning Guide - Split Ducted Variable Capacity Commercial Outdoor Unit
Doc. No.0525-066 Ver. 6 221012
OUTDOOR UNIT
Parts
Service Frequency
Detail of Service Check
Service Methods
1
Mth
3
Mth
6
Mth
1
Yr
2
Yrs
3
Yrs
4
Yrs
5
Yrs
Casing /
Panels and
Frames
Visual check for damage,
rust and dust accumulation.
For highly corrosive environment,
wash panels quarterly with water
and neutral detergent solution.
Wax panels. Repair / re-paint where
required.
Insulation
Visual check for insulation
conditions.
Repair / replace insulation material.
Fan
Visual check for run out of
balance and dust attached
Clean off dust as necessary to
negate possibility of fan running out
of balance
Motor
Ω
Visual check on wiring.
Insulation resistance check
to be carried out annually
Measure insulation resistance
to earth with insulation tester.
Insulation resistance should be
more than 1MΩ.
Heat
Exchanger
Check for clogging by dust.
Check for leaks / damage.
Clean air inlet side as necessary.
Straighten any bent fins using fins
comb.
Condensate
Drain Line
(if available)
Check for obstructions and
free flow of water
Clean to eliminate obstructions/
sludge and check condition of drain
line. Pour water to ensure free flow.
Compressor
Ω
Check for high / low
pressure. Measure
insulation resistance. Check
compressor for abnormal
noise/vibrations
Measure insulation resistance.
Should be more than 1MΩ.
Refrigeration
Operational
Readings
Make note of operational
reading in test cool/heat
Check operating pressures, record
superheat and subcooling values
Safety
Devices
Check calibration of safety
devices such as HP and LP
controls, sensors, etc
Check resistance of sensors,
pressure cut in / cut out of pressure
controls
Faults
Check for any previous fault
history on unit.
Investigate any causes for previous
faults, reset fault history.
Outdoor
Fan Speed
Capacitor
Check for any bulge on the
capacitors & capacitance.
Make it electrically safe prior to
measure the capacitor capacitance.
Measured capacitance should be
with in the printed tolerances on the
capacitor.
