Contact your local Liebert representative for factory approval whenever a refrigerant piping run exceeds
200 feet (60m) equivalent length or when condensers must be installed below the level of the cooling coil.
For Air-Cooled Liebert Lee-Temp / Flood Back Head Pressure Control Units Only
WARNING! Risk of explosive discharge from high-pressure refrigerant. Can cause injury or
death.
This unit contains fluids and/or gases under high pressure.
Relieve pressure before working with piping.
NOTICE
Risk of refrigerant contamination. Can cause equipment damage and operational problems.
Refrigerant R-407C is a blend of three components and must be introduced and charged from
the cylinder only as a liquid.
Refrigerant R-407C uses a POE (polyolester) lubricant. Do not open the compressor unit
piping to the atmosphere for more than 15 minutes. The compressors contain POE oil that is
very hygroscopic; it quickly absorbs water from the atmosphere. The longer the compressor
piping is open to the atmosphere, the harder it will be to fully evacuate. If left open too long, the
POE oil may need to be replaced before achieving the required vacuum level.
POE oils also have a property that makes them act as a solvent in a refrigeration system.
Maintaining system cleanliness is extremely important because the oil will tend to bring any
foreign matter back to the compressor. Refer to the ASHRAE refrigeration handbook for
general good-practice refrigeration piping.
Outdoor Ambient
°F (°C)
Condenser
Model 50/60Hz
Condenser
Qty
Receiver
Part #
Receiver
Qty
Head
Pressure Kit
Head
Pressure
Kit Qty
-30 to 100 (-34 to 38) DCSL415 2
185010G2
1
/G4
2
2 179711G1 2
-30 to 105 (-34 to 41) DCSL616 2
179713G1
1
/G2
2
1 179711G2 2
35 to 105 (2 to 41) DCSL616 2
181610G2
1
/G4
2
2 179711G1 2
1. 120V heater
2. 230V heater
Table 4.9
Receivers and head pressure kits for Liebert Lee-Temp condensers
Vertiv | Liebert® XDC™ User Manual | 46
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