22
11.15 207443 Rev104
AIR COOLED WATER CHILLERS
– AXIAL FANS
EKWXA/EKWXBA
It is advisable to do maintenance works every 1.000 operating hours as well as at the beginning of each cooling season.
•
Coils:
At least once a year, clean condenser coils with water and detergent, then dry with air at a pressure of 600 KPa.
Never clean with wire brush.
•
Drainage system
: Verify condition and good operation of the drainage tray and siphon.
• Refrigeration circuit:
Check for oil refrigerant leaks, noises or system’s vibrations. Take measurements of
temperatures and pressures of components and record them on the maintenance form.
• Electrical circuit:
Make sure that all electrical connections -wires, contactors and terminals- are properly tight. Record
the readings for volts and amperes of each compressor and fan motor. Verify the starting current. Check the good
operation of all relays, pressure switches and phase sequence relay of Scroll compressor.
MAINTENANCE
Before performing service or maintenance system’s operations turn off main power
switch to avoid personal injury and put lock on power switch to avoid that any person
not connected with maintenance technical can switch on electrical supply.
ATTENTION!
