Gaymar MEDI-THERM II MTA5900 Series, Руководство по обслуживанию

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SERVICE MANUAL
Medi-Therm II
REPAIR PROCEDURES
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9.1.1 R-12 SYSTEMS
CAUTION
Do not attempt servicing the R-12 refrigeration unit unless you are certified in
R-12 refrigeration maintenance, repair, and reclaiming procedures.
Supply the following information to the refrigeration service technician:
Use only R-12 refrigerant and mineral oil when charging a
Medi-Therm II R-12 system.
Using other refrigerants or oils will damage the compressor.
• For refitting options approved for the Medi-Therm II, please contact
Gaymar’s Technical Service Department.
• The following values apply when the water temperature in the reservoir
reaches 40°F (4.4°C), with the wraparound off, at a 72°F (22.2°C) ambient:
R-12 charge ......................... 1 pound (approx.)
Low side pressure ............ 22 to 25 psi
High side pressure ........... 125 to 150 psi
• If recharging is required, most likely there is a leak in the system. Locate
and repair any leaks before recharging the unit.
• Replace the two service valve caps and two gage port caps after servicing
the refrigeration system.
After servicing the refrigeration unit, be sure to perform the FUNCTIONAL
CHECK AND SAFETY INSPECTION (see section 7.3).
Do not attempt servicing the R-134a refrigeration system unless you are
certified in R-134a refrigeration maintenance, repair, and reclaiming procedures.
Supply the following information to the refrigeration service technician:
• Use only R-134a refrigerant and polyol ester oil when
charging a Medi-Therm II R-134a system.
Using other refrigerants or oils will damage the
compressor.
• The Medi-Therm II R-134a system uses a polyol ester oil for
lubrication because conventional mineral oils do not provide
sufficient lubricity and miscibility. R-134a refrigerant and
polyol ester oil are highly susceptible to moisture
absorption (more so than R-12 and mineral oil).
It is important that proper system evacuation,
charging, and leak detection procedures be
employed. Do not leave the refrigeration system
open to ambient air when servicing. Moisture
absorption will result in reduced compressor life.
CAUTION
•
9.1.2 R-134a SYSTEMS
•
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