20
5995432258
2 STAGE VACUUM
PUMP
Evacuating and Recharging Connections
Figure
E4
HEATED
CHARGING
CYLINDER
GAGE
MANIFOLD
PRESSURE
GAUGE
COMPOUND
GAUGE
HAND SHUTOFF
VALVE
TEE
FITTING
EVAPORATOR
CONDENSER
COMPRESSOR
FILTER
DRIER
PROCESS TUBE
ADAPTERS
HOT
TUBE
Refrigerant leaks
A system with R-134a and Ester oil will become
saturated with moisture much faster than a system with
R-12 and mineral oil. The compressor in an R-134a system
will have to be replaced if the product has had a low side
leak.
R-134a refrigerant molecules are smaller than R-12
molecules. This means that R-134a will pass more minor
leaks and the rate of flow will be greater than for R-12.
Therefore, it is now more important than ever to follow
good brazing practices. Use a good grade of silver solder.
45% silver solder is recommended.
leak detection
R-134a system leaks can be pinpointed by means of
an electronic leak detector or by bubble solution.
Electronic leak detectors for R-134a service are
currently available from several manufacturers. The least
expensive models are non-selective detectors that will
detect any type of emission or vapor present, regardless of
its chemical composition. Some non-selective detectors
designed for use with R-12 may have a much lower
sensitivity when used with R-134a. However, newly
designed detectors with good R-134a sensitivity are now
available. Be sure to consult with the manufacturer before
selecting or using a non-selective detector with R-134a.
Halogen-specific detectors use a specialized sensor
that allows detection of compounds containing chlorine,
fluorine, bromine, and iodine without being activiated by
other species. The major advantage of this type of detector
is a reduction in the number of “nuisance alarms”.
Halogen-specific detectors are generally more expensive
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than non-selective detectors but feature higher
sensitivity.R-134a properties
R-134a properties
The properties of R-134a are very similar to those of
R12. The principal data for the two refrigerants are shown
in the chart below.
Summary of Contents for Built-In Dishwasher
Page 1: ...1 5995432258 Built in Side by Side Refrigerator May 2005 ...
Page 6: ...6 5995432258 ...
Page 7: ...7 5995432258 DISCONNECT POWER CORD BEFORE SERVICING IMPORTANT RECONNECT ALL GROUNDING DEVICES ...
Page 12: ...12 5995432258 Component Locator Views Component Locator Views ...
Page 13: ...13 5995432258 Refrigeration System Refrigeration Components ...
Page 28: ...28 5995432258 Control Board Connector Locator ...
Page 30: ...30 5995432258 Connector Description ...
Page 57: ...57 5995432258 leshooting Notes Schematics Warranty Troubleshooting Notes ...
Page 58: ...58 5995432258 Schematics ...
Page 59: ...59 5995432258 ...
Page 61: ...61 5995432258 Refer to Test Function above ...
Page 62: ...62 5995432258 ...
Page 63: ...63 5995432258 ...
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