Install Manual

7.0 Open Loop Systems
7.1 Water Quality
Geocool units use a cupro nickel heat exchanger which has an i ncreased resistance to ground
water chemicals , which are known to cause build up and corrosion. The water source must be
tested and treated before the i nstallation of the Geocool unit. Failure to do so will void the warranty
of the unit.
Always maintain water pressure i n the heat exchanger by placing the water control valve at the
outlet of the unit to prevent deposit buildup. Use a closed, bladder-type expansion tank to minimize
mineral formation due to air exposure. Insure proper water flow through the unit. A flow rate of 2-3
gpm per ton i s recommended i n open l oop applications. Due to only minor differences i n flow rate,
only one motorized valve should be used on 2 speed units. The valve should be sized for high
speed flow.
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