3. The oil level should be vi s ibl e anywhere in one of the two sig ht glasses. Foaming of th e oil
is acceptable as long as th e oil pressure and temper at ure are within limits.
4. The oil pressure shou ld be between 18 and 30 psid (124 to 20 7 kPad) differential, as s ee n
on the LID default screen. Typically the reading will be 18 to 25 psid (124 to 172 kPa d) at
initial start- up.
5. The moisture indicat or s ig ht glass on the refrigera nt motor cooling line sho uld indicate
refrigerant flow and a dr y c on dition.
6. The condenser pressu re and temperature varies wi th the machine design con ditions.
Typically the press ur e wi ll 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 sh oul d be controlled below the s pe cified design enteri ng wa ter
temperature to save on compressor kilowatt requirements.
7. Cooler pressure an d temperature also w ill vary with the design conditions. Typic al pressure
range will be between 60 an d 80 psig (410 and 550 kPa), wit h temperature ranging
between 34 and 45 F (1 and 8 C).
8. The compressor may op erate at full capacity f or a short time after the pul ldown ramping has
ended, even though th e bui lding load is small. The ac ti ve electrical demand se tt in g can be
overridden to limit t he c om p ressor IkW, or the pulldo wn rate can be decreased to av o id a
high demand charge for t he short period of high dem and operation. Pulldown r at e can be