Owner Manual

water chemicals which can cause build up and corrosion. The water source must be tested and
treated before the installation of the Geocool unit. Failure to do so will void the warranty of the
unit.
Always maintain water pressure in 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. 2-3
gpm of flow per ton is recommended in open loop applications. Due to only minor differences in
flow rate, only one motorized valve should be used on 2 speed units. The valve should be sized
for high speed flow.
IMPORTANT:
On installations where the groundwater temperature is expected to fall below 50°F during
any part of the heating season, perform a calculation to anticipate higher flow rate
requirements. A higher water flow rate results in a lower temperature drop through the
liquid to refrigerant heat exchanger. This prevents the Freeze protection/low limit from
activating unnecessarily.
7.2 Discharge Water Line
Page 14