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05.17 207646 Rev.103
EKWXA│EKWXBA
AIR-COOLED WATER CHILLERS
AXIAL FANS
HYDRONIC KIT
OPERATING LIMITS
OPERATING LIMITS
7002.4
8002.4
9002.4
Coefficient of thermal expansion Water between 7-50°C / 2 bar
ΔV/V
0,0125
Coefficient of thermal expansion Water between 7-55°C / 2 bar
ΔV/V
0,015
Expansion vessel
l
50
Maximum water volume (7-50)ºC
l
1992
Maximum water volume (7-55)ºC
l
1672
MAINTENANCE
CONSERVATION AND CLEANING
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 low pressure. 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.
LUBRICANT
R-410A refrigerant compressors use synthetic polyolester oil. Each compressor manufacturer has a specific oil for your product.
The compressor or system should not remain open to atmosphere for more than 15 minutes.
Synthetic ester-type lubricants (POE, Polyol Ester) having high solubility with R-410A are used. Since these types of oils are very
hygroscopic, it should be more careful handling them than with conventional ones. Moreover, when these synthetic oils are mixed with
minerals or alkylbenzenes, they deteriorate causing capillary blockage or failure in the compressor.
Do not mix under any circumstances.
Before performing any service or maintenance of the unit, it is mandatory to disconnect and lock the system
main switch to prevent anyone other than the technician from connecting the unit and causing personal
injury.
WARNING!
