HEAT PUMP WATER HEATER COMPRESSOR CRITERIA FOR LONG LIFE SYSTEM
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15 Impurities in refrigerating system
(1)
The weight of residue on the inside surface of the heat exchanger and tube should be less
than 0.01g/m
2
. But metallic dust should not be permitted in the system. This value means the
weight of foreign residue collected by filer paper after washing inside surface of the heat exchanger tubes with R-11.
(1)
Prevent the impurities from entering into the enclosed unit system used refrigerant. When the impurities
entered into the enclosed system, it will damage the moving mechanism parts and result in the capillary depositing.
(1)
Eliminate all system contaminants such as trichlorethylene, alkalies, soaps, oil, acids &
washing fluid used at machining heat exchanger and tubes.
16 Compressor vacuum operation
Compressor should never be operated while under vacuum. Otherwise, internal arcing can cause damaging
parts.
17 The compressor should be operated for more than 20 seconds within 15 minutes after charging
refrigerant into the system so proper lubrication results.
18 Liquid refrigerant return limitations
(1) Liquid refrigerant level in s-tank should be lower
than the top of s-pipe in s-tank.(see chart at right)
(2) There should not exist noise of the liquid refrigerant compression,
current and vibrancy increase. System can append the assistant stank
or reduce the amount of refrigerant to prevent from liquid refrigerant
compression. Refrigerant system forbid liquid refrigerant from
flowing back compressor in any case. In normal condition the overheat gas refrigerant should flow back
compressor.
Summary of Contents for Highly WHP07850VUK
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