Trane Technologies Axiom EXW, Installation, Operation And Maintenance Manual

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26 WSHP-SVX02C-EN
Maintenance
Preventive Maintenance
Maintenance on the unit is simplified with the following
preventive suggestions:
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
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!
Coil cleaning agents can be either acidic or highly
alkaline and can burn severely if contact with skin
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. Failure to
follow all safety instructions could result in death or
serious injury.
It should be noted that the water quality should be checked
periodically. See
Table 14 .
Table 14. Water quality table
Scaling
Calcium and magnesium (total hardness) Less than 350 ppm
Corrosion
pH
Hydrogen Sulfide
Sulfates
Chlorides
Carbon Dioxide
Total dissolved solids (TDS) 7-9.5
Less than 1 ppm
Less than 25 ppm
Less than 125 ppm
Less than 75 ppm
Less than 1000 ppm
Biological Growth
Iron Bacteria Low
Erosion
Suspended Solids Low