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14.3 Changing the Com pressor Oil
Refrigeration oil is of bright, transparent appearance even after extended operation. However, various conditions
of the system can affect the oil such as insufficient evacuation of the system on start up, dirt from the pipework on
installation and excessive discharge temperatures. Initial Oil type is stated on the serial plate, for alternatives refer
to Hubbard Technical.
When the oil is seen to be in an unclean condition it should be changed to avoid consequential compressor
damage.
14.4 Changing a Com pressor.
These instructions may be supplemented by additional reference material provided.
ATTENTI ON
P lease ensure all w ork carried out is in accordance w ith your com panies w orking
practices and that the required equipm ent/ P P E is available and used.
W ARN I NG
P ipew ork associated w ith the condenser w ill be at ex trem e tem peratures.
W ARN I NG
Ensure condenser electrical supply is fully isolated and lock ed off prior to w orking on
unit.
Should the need arise to change a compressor the following sequence should be followed:
Electrical
1. Turn off the power and control circuit of the compressor to be removed and attach a notice to the panel stating
that work is being carried out on the equipment.
2. Disconnect the wires from the compressor terminals taking note of the position of each cable.
3. Remove the conduits and cable from the terminal box.
Mechanically Isolate the Compressor
4. Undo any pipe clamps of pipework running to the compressor.
Copyright HPL March 2021
Page 21 of 169
P4367 Rev 01
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