30
WSHP-SVX10H-EN
Maintenance
Preventive Maintenance
Maintenance on the unit is simplified with the following
preventive suggestions:
Filter maintenance must be performed to assure proper
operation of the equipment. Filters should be inspected at least
every three months, and replaced when it is evident they are
dirty. Filter sizing includes:
Table 21. Filter sizing
Model GET
Filter Size (nominal)
009-012
14 x 20
015-018
18 x 25
024-036
20 x 30
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is present
with a voltmeter.
Check the contactors and relays within the control panel at
least once a year. It is good practice to check the tightness of
the various wiring connections within the control panel.
A strainer (60 mesh or greater) must be used on an open loop
system to keep debris from entering the unit heat exchanger
and to ensure a clean system.
For units on well water, it is important to check the cleanliness
of the water-to-refrigerant heat exchanger. Should it become
contaminated with dirt and scaling as a result of bad water, the
heat exchanger will have to be back flushed and cleaned with
a chemical that will remove the scale. This service should be
performed by an experienced service person.
WARNING
Hazardous Chemicals!
Failure to follow this safety precaution could result in
death or serious injury. Coil cleaning agents can be
either acidic or highly alkaline and can burn severely if
contact with skin or eyes occurs.
Handle chemical carefully and avoid contact with skin.
ALWAYS wear Personal Protective Equipment (PPE)
including goggles or face shield, chemical resistant
gloves, boots, apron or suit as required. For personal
safety refer to the cleaning agent manufacturer’s
Materials Safety Data Sheet and follow all
recommended safe handling practices.
It should be noted that the water quality should be checked
periodically.
Table 22. Water quality table
Scaling
Calcium and magnesium (total
hardness)
Less than 350 ppm
Corrosion
pH
7-9.5
Hydrogen Sulfide
Less than 1 ppm
Sulfates
Less than 25 ppm
Chlorides
Less than 125 ppm
Carbon Dioxide
Less than 75 ppm
Total dissolved solids (TDS)
Less than 1000 ppm
Biological Growth
Iron Bacteria
Low
Erosion
Suspended Solids
Low