Quantech QTC40160, Installation Operation & Maintenance, Page: 175 / 188

Section 9 - Maintenance
Quantech
175
Form QTC4-NM2
Issue date: 05/12/2023
9
Procedure Weekly Quarterly Semi-
annually
Annually Every 5
years
Every *
hours
Check oil level in oil separator sight glass X
Check liquid line sight glass/moisture
indicator
X
Check refrigerant level in the evaporator
sight glass while running full load for 10
min to 15 min
X
Record system operating temperatures
and pressures
X
Check condenser coils for dirt or debris
and clean as necessary
X
Check programmable operating setpoints
and safety cutouts. Ensure they are cor-
rect for the application
X
Check compressor and evaporator heater
operation
X*** X
Check suction isolation valve operation if
equipped
X
Check for dirt in the panel. Check door
gasket sealing integrity
X
**Leak check the chiller X
**Sample compressor oil, check for acid,
and replace if necessary
X
**Disconnect power source and lock out.
Check tightness of power wiring connec-
tions
X
Check glycol concentration on low
temperature or other applications where
freezing may be a problem
X
Replace corrosion inhibitor pucks, part
number 026-37706-000, inside the chiller
vsd cabinet
X
VSD glycol change X
* Reserved for customer use for any special site requirements.
** This procedure must be performed at the specific time by an industry certified technician who has been
trained and qualified to work on this type of equipment. A record of this procedure being successfully carried out must be maintained on file by
the equipment owner if proof of adequate maintenance be required at a later date for warranty purposes.
*** Chiller controller cannot detect the failure of heaters, all heaters including compressor and evaporator heater need to be checked weekly
and maintained to be operational in subfreezing regions in winter. Weekly maintenance to heaters and with the chilled water pump controlled
by unit controller is recommended and mandatory.
Maintenance requirements for QTC4 chillers