Specifications

(liter) of additional oil per compressor. The amount to be

added will vary depending on the system, but keeping the

oil level between 1/8 and 3/8 level in the sight glass will

eliminate the chance of excessive oil charges.

Adding excessive oil to the 06E and 06CC (50 to 99 cfm)

compressors can cause blown gasket problems.

When CFC or HCFC refrigerants are used with mineral

or alkylbenzene oils, foam in the sight glass normally

indicates either that there is serious liquid refrigerant

floodback or that the running gear is hitting the oil due to

a very high oil level. Very high oil levels are caused by

either too much oil or excessive liquid refrigerant in the

crankcase. HFC refrigerants and POE oils do not foam

easily, so there will be less indication in the sight glass of

either liquid refrigerant floodback or too much oil in the

system.

Liquid refrigerant should never be allowed to flood back

to the compressor. It may wash out bearings and damage

gaskets. If liquid floodback is occurring, adjust the

expansion valve or make other adjustments as necessary

to eliminate this condition.

NOTE: One possible cause of flooding is improper

control of the defrost cycle. Ensure defrost cycles are

staggered so no more than one third of the system is on

defrost at any time.

COMPRESSOR OPERATING LIMITS

Figures 1A and 1B show the components and typical

operating ranges of the Carlyle 06D, E and 06CC

compressors.

CAUTION