For an add on Heat Pump
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where an ISO VG 100 oil is mandatory, the oil may
also be applied to the refrigeration compressor(s) providing:
•
An oil cooler is present to ensure the oil temperature stays within normal
operating limits (refer to paragraph 2.8 “Air Cooled Oil Cooler” in the Product
Information)
•
A minimum oil temperature of +30°C is achieved before start-up
•
The minimum allowable evaporating temperature is considered to ensure
adequate oil recovery from the evaporator(s). The minimum recommendation
is -20°C/R717
Strongly Recommended Oil Type
PR-OLEO® C-MH100A-FG
4.7
Pre-lubrication oil system
Why pre-lubrication?
Pre-lubrication is necessary in situations listed below, in order to provide
sufficient lubricating oil at locations where this is most needed (oil pump,
bearings, pistons en piston rings) to ensure that any risk on 'dry running' is
minimized or even better eliminated. Dry-running of oil pump bearings pistons
and piston rings will initiate and after initiation worsen the wear of the parts
mentioned and eventually even damage the crank shaft and cylinder liners or
even more parts.
When pre-lubrication?
1.
Before initial start-up
2.
Before start-up after overhauling compressor
3.
Before start-up after renewal of oil
4.
Before start-up after standstill period of more than 1 month
Pre-lubrication procedure
1.
Top up crankcase to the minimum required oil level
2.
Connect oil filling pump to pr-lubrication stop valve and top up oil to 50-75%
level (Hand operated oil filling pump can be supplied by Grasso)
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An add on Heat Pump is where discharge gas from the refrigeration compressor(s) enters
directly into the suction side of the heat pump compressor(s). In this case a common oil for
both the refrigeration and heat pump compressors may be advantageous.
APPENDIX; Product Information (PI)
Pre-lubrication oil system
P-NL-094_imm_VHS_English_13
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26.07.2021
