Chillers
ULTIMA FREECOOL
Chillers
Installation & Maintenance Manual : 903-125 IM E 05/04/A
37
Maintenance
GENERAL MAINTENANCE
6 MONTHS
ACTION
NOTES
Repeat 3 month checks plus the following:
SYSTEM
Check evaporator trace heating and low ambient thermostat
are set to activate at 4.0ºC.
Remember to re-cap the Schraeder
connections!
12 MONTHS
ACTION
NOTES
Repeat 6 month checks plus the following:
SYSTEM
Check safety devices cut out the compressor at the correct
settings.
REFRIGERATION
Check glycol concentration.
Adjust as necessary.
Leak test all R407C joints and inspect all water connections. Rectify as necessary.
Record superheats with chiller running on full load and
minimum load (the height of summer is recommended).
Recheck the charge following major adjustment of
the superheats.
Check flow rate and evaporator pressure drop.
If lower than commissioning data, check water
filter and clean if necessary.
Check 3 port valve by driving fully open and closed.
ELECTRICAL
Tighten all electrical terminals.
Periodic maintenance and inspection of this equipment is necessary to prevent premature
failure, the following periodic inspections should be carried out by period or hourly use
which ever is sooner.
1 Year
Measure compressor motor insulation.
7,500 Hours or 4 Years
Inspect compressor oil.
COMPRESSOR
MAINTENANCE
20,000 Hours or 4 Years
Inspect oil filter, gate rotor & suction filter.
SHUT DOWN PERIODS
For periods of winter shut down the following precautions are recommended:
•
Close the liquid and discharge ball valve
•
Cap service ports
•
Turn off electrical circuits
•
Drain the water from the chiller evaporator coil and pipework via the drain plugs.
Units fitted with the EEV option and EEV back up Battery only.
ELECTRONIC
EXPANSION VALVE
(OPTION)
Note: The battery is a consumable part with a life expectancy of 2-5 years.
