Owner’s Manual
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Care and Maintenance
For continuing high performance, and to minimize possible equipment failure, periodic maintenance must be performed on this
equipment. Frequency of maintenance may vary depending upon geographic areas, such as high dust, pollen or air pollution. Pay
close attention to cleanliness of the unit’s filters and heat exchangers.
CAUTION: Failure to follow these instructions will shorten the life of your heat exchanger and result in poor performance of
your system.
Fan Maintenance
Inspect all fan parts including air intake, blades, motor and shroud as well as for free movement. The inspection frequency is
determined by the severity of the application and local conditions. Strict adherence to an inspection schedule is essential.
The location of the unit will determine how often you should inspect your air system. Full inspection should be accomplished during
seasonal start-up and during winter shutdown periods. If operating in areas with excessive dust, cotton, pollen, leaves, or insects
should perform inspection steps more frequently. Regular fan maintenance should include the following:
Check the fan blades for any wear or corrosion, as either could cause catastrophic failures.
Inspect for any air-flow restrictions around system intake, conditioned and working air ducts and diffusers.
Check for the accumulation of material on the impeller surfaces, which could cause imbalance, resulting in vibration, excess
noise, and premature bearing wear. Clean or replace the wheel as required.
During any maintenance, all bolts should be checked for tightness.
Unit Support
Your unit should be maintained at a level and well supported position for proper operation. If the unit should shift or settle so that it
is no longer level, you should contact your dealer and get it re-leveled promptly to assure proper operation, efficiency and durability.
The unit should be level to no more than 1/16” per foot (1.5 mm per 300 mm) side to side and front to back.
Water System Maintenance
Water delivery devices and piping should be inspected to insure proper water flow. This includes all pipes leading to the air
conditioner as well as the internal tubes that deliver water to the heat exchangers. Turn off fan with fan switch mounted on the top
front of M30 or C60 units; M50A has a magnetic door switch that will shut the fan off when the access door is removed.
Check the water supply system for leaks, and repair if needed. Any leaks should be repaired immediately to assure proper water
delivery to the unit. With the air filters removed, check the internal tubes of the water distribution system for leaks. Proper and
consistent water flow is essential for efficient and proper unit operation. Water overflowing from the top of the drain pan may
indicate that the drain is partially plugged. If this is the case, remove the elbow from the bottom of the drain pan and clean.
Caution: The water pressure must be maintained between 25 psi and 80 psi (172 and 552 kPa). Below 25 psi (172 kPa) the fan will
turn off automatically to prevent drying out of Heat and Mass Exchangers.
Note: Failure to maintain consistent water pressure more than 25 psi (172 kPa) or less than 80 psi (552 kPa) will void warranty.
Water Quality
Water quality can be difficult to quantify, as there are different factors that must be considered. To ensure proper performance of
the Heat and Mass Exchangers (HMXs), prolong the life of equipment components and to avoid increased maintenance, the below
water criteria must be considered and evaluated before installation.
Solids: All water supplies have the potential to have un-dissolved solids from water line repairs, additions and maintenance. Solids in
the water supply must be filtered out when above 30 microns to prevent plugging of the water distribution system or Heat and Mass
Exchangers (HMXs). Coolerado supplies 30 micron water filters with each unit. Installation of the Coolerado supplied 30 micron filter
or equivalent is required on all installations to filter un-dissolved solids.
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