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MAINTENANCE
WARNING
After the compressor has been pumped down and isolated,
the oil contained inside the filter housing will remain hot
enough to cause burns for some time afterwards. Always allow
sufficient time for the oil to cool down so that it is cool enough
not to be a danger when drained off (less than 35°C [95°F] is
recommended). Severe injury from burns can result.
Figure 42: Oil Filter Location
Figure 43: Oil Filter Housing Cover Plate
Oil filter assembly components are:
• Oil Filter – 250mm
• Oil Filter Housing Cover
• O-Ring – 89.5x3
• O-Ring – 76.1x3.4
• (6) M8 Bolts
DAIKIN APPLIED
Disassembly Procedure
1 . Unscrew and remove two hex head side cover bolts 180°
apart. Insert M8 guide studs into the vacant holes.
2 . Remove remaining bolts and oil filter housing cover.
3 . Pull the oil filter off of the spigot and withdraw the oil filter
from the housing and clean the housing.
4 . Clean oil filter housing cover plate and all other
components.
Fitting a New Oil Filter Element – Reassembly
Before reassembly, remove any paint from joint faces. Inspect
parts individually for damage and ensure they are completely
clean before laying them out on a clean surface in a logical order
ready for reassembly.
Use fresh refrigerant oil to lubricate parts during reassembly.
1 . Install new O-rings on the oil filter housing cover.
2 . Insert new oil filter into the housing, ensuring the filter sits
tightly on the sealing spigot.
3 . Replace the oil filter housing cover.
4 . Evacuate air and non-condensibles before valving
refrigerant back into the compressor.
Electrical Terminals
Electric equipment can cause electric shock which will cause
severe personal injury or death. Turn off, lock out and tag all
power before continuing with following service. Panels can have
more than one power source.
Periodically check electrical terminals for tightness and tighten
as required. Always use a back-up wrench when tightening
electrical terminals.
Liquid Line Sight Glass
Observe the refrigerant sight glasses weekly. A clear glass of
liquid indicates that there is adequate refrigerant charge in the
system to provide proper feed through the expansion valve.
Bubbling refrigerant in the sight glass, during stable run
conditions, may indicate that there can be an electronic
expansion valve (EXV) problem since the EXV regulates
refrigerant flow. Refrigerant gas flashing in the sight glass could
also indicate an excessive pressure drop in the liquid line,
possibly due to a clogged filter-drier or a restriction elsewhere in
the liquid line. At full load operating conditions, subcooling values
will be approximately 7.2°F (4°C) and suction superheat values
will be approximately 0.9°F (0.5°C).
An element inside the sight glass indicates the moisture condition
corresponding to a given element color. If the sight glass does
not indicate a dry condition after about 12 hours of operation, an
oil acid test is recommended.
58
DANGER
CAUTION
NAVIGATOR WWV/TWV
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