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11InRow RD 10 kW Air Cooled Operation and Maintenance
2. Prepare to add oil:
a. Use a new, sealed oil can and a manual oil pump. The pump hose must be sized for 1/4 in
flare fittings and must include a valve depressor at its end, which will open the valve on the
Schrader service port of the compressor.
b. At a minimum, use a quality POE oil with a viscosity of 32 cst, 160 sus at 40°C (104°F).
Suggested oils: Danfoss Maneurop 160 PZ Polyolesteroil, the approved type of oil for this
equipment. Approved alternative oil types:
• CPI (Lubrizol) reference: CP-2931AH or CP-2931A or equivalent
• ICI_UNIQUEMA reference: Emkarate RL32H or equivalent
3. Purge the pump and hose:
a. Ensure that the oil pump is clean. Insert the pump in the oil container and make sure that
the container is open to the atmosphere for as short a period of time as possible. When
available, use a plug adaptor kit to further reduce the exposure of the oil to the atmosphere.
b. Bleed all air from the pump and hose with a few strokes of the pump. Purging the pump
removes the moisture-saturated oil left inside the hose from previous usage.
c. Connect the hose to the Schrader service port of the compressor immediately after purging
to avoid moisture contamination.
4. While the equipment is running, charge the oil through the suction service port. Pump the oil very
slowly.
Caution: Be careful not to charge more oil than is necessary. Excessive oil in the
system may cause system damage, including the following:
– Failure of compressor due to oil slugging.
– Excessive oil carryover.
– Loss of evaporator performance due to oil level build-up in the low-pressure side
of the system.
Note: Dispose of the oil waste appropriately.