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Start-Up Procedure (continued):
Operate the system for a minimum of two hours and perform checks of the following:
Check the compressor discharge and suction pressures to ensure they are in the
normal operating range.
Check the liquid line sight glass for proper refrigerant charge (based off of 105ºF
condenser coil).
Monitor the compressor oil level (semi-hermetic compressors), add oil as necessary to
keep the level at ¾ sight glass when idle and ½ sight glass when running.
Check the voltage and amperage at the compressor terminals. Voltage must be
within +10% or -5% of the rating indicted on the condensing unit name plate. On
three phase compressors, verify there is a balanced load.
Check all fans on the evaporator coil and condensing unit to be sure they are
operational and turning in the correct direction.
Check the piping and electrical connections for vibration. Add supports and
strapping if needed.
Check the crankcase heater operation (if equipped).
Set the defrost control time and verify the defrost initiation settings. See pages
28-30 for additional details.
Set temperature control to desired temperature range.
Check the compressor and evaporator superheat (reference pages 21-23).
After all system checks have been checked, properly adjusted, and verified, replace all
Schrader caps, service valve caps, electrical box covers, housings, etc. File a copy of
this manual for future reference.
CAUTION
Failure to check and properly adjust compressor superheat can result in premature
system failure.
MISE EN GARDE
La vérification et le réglage inadéquats de la surchauffe du compresseur peut
entraîner une défaillance prématurée du système.
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