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3. The oil level should be visible anywhere in one of the two sight glasses. Foaming of the oil
is acceptable as long as the oil pressure and temperature are within limits.
4. The oil pressure should be between 18 and 30 psid (124 to 207 kPad) differential, as seen
on the LID default screen. Typically the reading will be 18 to 25 psid (124 to 172 kPad) at
initial start-up.
5. The moisture indicator sight glass on the refrigerant motor cooling line should indicate
refrigerant flow and a dry condition.
6. The condenser pressure and temperature varies with the machine design conditions.
Typically the pressure will range between 100 and 210 psig (690 to 1450 kPa) with a
corresponding temperature range of 60 to 105 F (15 to 41 C). The condenser entering
water temperature should be controlled below the specified design entering water
temperature to save on compressor kilowatt requirements.
7. Cooler pressure and temperature also will vary with the design conditions. Typical pressure
range will be between 60 and 80 psig (410 and 550 kPa), with temperature ranging
between 34 and 45 F (1 and 8 C).
8. The compressor may operate at full capacity for a short time after the pulldown ramping has
ended, even though the building load is small. The active electrical demand setting can be
overridden to limit the compressor IkW, or the pulldown rate can be decreased to avoid a
high demand charge for the short period of high demand operation. Pulldown rate can be