25
WC SERIES VARIABLE SPEED DUAL SCREW CHILLER INSTALLATION MANUAL
Preventative Maintenance
Unit Heat Exchanger Maintenance
1.
Keep all air out of the water or antifreeze solution.
2.
Keep the system under pressure at all times. Closed
loop systems must have positive static pressure or
air vents may draw air into the system.
NOTES
: If the installation is in an area with a known high
mineral content in the water, it is best to establish with
the owner a periodic maintenance schedule for checking
the water-to-refrigerant heat exchanger on a regular
basis. Should periodic cleaning be necessary, use
standard cleaning procedures. Generally, the more
water flowing through the unit, the less chance there
is for scaling. Low GPM flow rates produce higher
temperatures through the heat exchanger. To avoid
excessive pressure drop and the possibility of metal
erosion, do not exceed GPM flow rate as shown on the
specification sheets for each unit.
Quarterly Checks
•
Compressor oil levels
•
Test and check all manual safeties
•
Check strainers for debris
•
Check water flow rates and pressure drops across
evaporators and condensers
•
Verify graphical data and trending
•
Properly document all data
Annual Checks
•
Remove and clean all waterside strainers
•
Back washing of heat exchangers
•
Perform leak tests on all refrigerant circuits
•
Check all water flanged connections for wear or
leaks
•
Implement oil analysis if deemed necessary
•
Verify all electrical connections
•
Check and update all graphical interface items
along with main controller
•
Check and test all safeties both mechanical and
software
•
Verify sensor accuracy
•
Do a system check to get overall overview
•
Properly document all data
Replacement Procedures
When contacting the company for service or
replacement parts, refer to the model number and
serial number of the unit as stamped on the serial plate
attached to the unit. If replacement parts are required,
mention the date of installation of the unit and the date
of failure, along with an explanation of the malfunctions
and a description of the replacement parts required.
In-Warranty Material Return
Material may not be returned except by permission
of authorized warranty personnel. Contact your local
distributor for warranty return authorization and
assistance.
