HEAT PUMP WATER HEATER COMPRESSOR CRITERIA FOR LONG LIFE
SYSTEM
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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
should flow back
flowing back compressor in any case. In normal condition the
overheat gas refrigerant compressor.
19 Process limitation of refrigerating system
(1) Be careful of avoiding oxide scale while soldering during assembly o
refrigerating system.
(for example: flow or fulfill dry nitrogen)
(2) The motor winding temperature should be less than 149
℃
and hermetic terminal body
temperature should be less than 177
℃
in process of manufacturing.
20 Apply for vehicle
The compressor should not be used on moving equipment such as
automobiles, trains, ships, etc.
20 Installation
The rotational axis of compressor should be kept vertical during operation. But in actual
application the axis incline must be within 5
at all directions during operation.
21 Pipe vibration
The displacement of the pipes, which connect from the compressor to other parts of the refrigerate-
or systems, should be less than 0.8mm(1/32”)when the compressor is operating at allowable
rotational speed range and voltage range of rated ±10%.
Displacement in excess of 0.8mm(1/32”) will require changing tube length and/or routing.
22 Connecting tube design
In designing and routing tubing that connect from the compressor to the other parts of the air conditioner,
following should be considered.
Moving tubes to the moving parts; minimum clearance 12.7mm(1/2”)
Moving tubes to non-moving parts; minimum clearance 9.5mm((3/8”)
Moving tubes never touch to lead wire.
23 Avoid refrigerant migration
The refrigerant migration to compressor shell should be avoided during the heat pump water
heater system shut down periods, It’s suggested that the electric heating belt should be used around
the shell bottom when necessary.
Summary of Contents for Highly WHP05600VUK
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