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SERVICING
Non-condensables are removed from the system by first
removing the refrigerant charge, replacing and/or installing
liquid line drier, evacuating and recharging.
COMPRESSOR BURNOUT
When a compressor burns out, high temperature develops
causing the refrigerant, oil and motor insulation to decom-
pose forming acids and sludge.
If a compressor is suspected of being burned-out, attach
a refrigerant hose to the liquid line dill valve and properly
remove and dispose of the refrigerant.
NOTICE: Violation of EPA regulations may result in fines or
other penalties.
Now determine if a burn out has actually occurred. Confirm
by analyzing an oil sample using a Sporlan Acid Test Kit,
AK-3 or its equivalent.
Remove the compressor and obtain an oil sample from the
suction stub. If the oil is not acidic, either a burnout has not
occurred or the burnout is so mild that a complete clean-up
is not necessary.
If acid level is unacceptable, the system must be cleaned
by using the clean-up drier method.
Do not allow the sludge or oil to contact the skin. Severe
burns may result.
NOTE: The Flushing Method using R-11 refrigerant is no
longer approved by Daikin Brand Heating-Cooling.
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CAUTION
REFRIGERANT PIPING
The piping of a refrigeration system is very important in
relation to system capacity, proper oil return to compressor,
pumping rate of compressor and cooling performance of
the evaporator. A bi-flow filter drier must be brazed on by
the installer onsite. Ensure the bi-flow filter drier pain finish
is intact after brazing. If the paint of the steel filter drier has
been burned or chipped, repaint or treat with a rust preven-
tative. The recommended location of the filter drier is before
the expansion device at the indoor unit. The liquid line
must be insulated if more than 50 ft. of liquid line will pass
through an area that may reach temperatures of 30°F of
higher than ambient in cooling mode and/or if the tempera-
ture inside the conditioned space may reach a temperature
lower than ambient in heating mode. FVC oils maintain a
consistent viscosity over a large temperature range which
aids in the oil return to the compressor; however, there will
be some installations which require oil return traps. These
installations should be avoided whenever possible, as
adding oil traps to the refrigerant lines also increases the
opportunity for debris and moisture to be introduced into the
system. Avoid long running traps in horizontal suction line.
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