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WSHP-SVN08B-EN 25
Preventive Maintenance
Maintenance on the unit is simplified
with the following preventive sugges-
tions:
Filter maintenance must be performed
to assure proper operation of the
equipment. Filters should be inspect-
ed at least every three months, and re-
placed when it is evident they are
dirty. Filter sizing includes:
WARNING
Hazardous
Voltage!
Disconnect all electric power, in-
cluding remote disconnects and
discharge motor start/run capaci-
tors before servicing. Follow prop-
er lockout/tagout procedures to
ensure the power can not be inad-
vertently energized. Failure to dis-
connect power before servicing
could result in death or serious in-
jury.
Check the contactors and relays within
the control panel at least once a year.
It is good practice to check the tight-
ness 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 sys-
tem.
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
Model GET Filter Size (nominal)
009, 012 14 x 20 (356 x 508)
015 18 x 20 (457 x 508)
018 18 x 25 (457 x 635)
024, 036 20 x 30 (508 x 762)
Maintenance
should be performed by an experi-
enced service person.
WARNING
Hazardous
Chemicals!
Coil cleaning agents can be either
acidic or highly alkaline. Handle
chemical carefully. Proper han-
dling should include goggles or
face shield, chemical resistant
gloves, boots, apron or suit as re-
quired. For personal safety, refer
to the cleaning agent manufactur-
ers Materials Safety Data Sheet
and follow all recommended safe
handling practices. Failure to fol-
low all safety instructions could
result in death or serious injury.
It should be noted that the water qual-
ity should be checked periodically. See
Table 9.
Table 9: Water Quality Table
Scaling
Calcium and magne-
sium (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
!
!