Maintenance - LG AKWW0243AA0 Installation Manual

Installation

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.
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
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.
- Hazardous Chemicals
Coil cleaning agents can be either acidic or highly alkaline. Handle chemical carefully. Proper handling
should include goggles or face shield, chemical resistant gloves, boots, apron or suit as required. For
personal safety, refer to the cleaning agent manufacturers 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 the following water
quality table.
Scaling
Corrosion
Biological Growth
Erosion
Operating range
Air
Water
28 Water Cooled Package
Calcium and magnesium(total hardness)
pH
Hydrogen Sulfide
Sulfates
Chlorides
Carbon Dioxide
Total dissolved solids(TDS)
Iron Bacteria
Suspended Solids
Cooling
64.4~89.6
59~104
scaling as a result of bad water, the heat
Less than 350 ppm
7 ~ 9.5
Less than 1 ppm
Less than 25 ppm
Less than 125 ppm
Less than 75 ppm
Less than 1000 ppm
Low
Low
(unit : Fahrenheit, °F)
Heating
50~69.8
59~104