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9-14
SERVICE OPERATIONS
Removal Of Refrigerant From The Machine. To transfer the refrigerant charge from the machine
into a separate container, proceed as instructed above under "Pumpdown". This will isolate most of
the refrigerant in the receiver and the recovery unit can be connected to the access port (44) of the
hand stop valve (58) at the bottom of the receiver. Open the valve access port by turning the valve
stem in (front seat) and operate the recovery unit until the system is considered empty.
Approved recovery equipment, hoses, gages, and refrigerant containers must be
It is not recommended that refrigerant be transferred from a refrigeration system
into a cylinder. If such a transfer is made, the refrigerant cylinder must be an
approved CLEAN cylinder -- free of any contaminants or foreign materials--and
must be weighed continuously to assure contents do not exceed net weight specified
Refrigerant Leaks. In addition to testing the machine for leaks as instructed under "Refrigerant
Charge", it is advisable to again make a leak test after the unit has been in operation approximately
one week. Any noticeable change in operating conditions, other than shown on the "Certificate of
Test" may indicate a loss of refrigerant due to a leak. Always remove the refrigerant pressure from
the vessel or tubing before repairs are attempted.
Non-condensable Gases. Satisfactory operation of the machine is not possible if non-condensable
gases (usually air) are present in the system. Excessive condensing pressure is an indication of such
gases.
Excessive condensing pressure in water cooled condensers may also be due to the
accumulation of scale in the cooling coil or due to insufficient cooling water or excessive water
temperature. See "Water Cooled Condensers", Section 7.
4/2/14
used to comply with all local and federal EPA regulations.
Follow these instructions carefully.
Severe personal injury can result from improper
discharge of refrigerant.
by cylinder manufacturer or any applicable code requirements.
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03TA Service Manual
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