Owner Manual

Discharge water from the unit is not contaminated in any manner and can be disposed of in
various ways. Discharge water should run outside with no restrictions to a discharge well, creek,
pond, storm drain, etc. Discharge piping must be prepared in a manner that will not freeze. Most
local codes forbid the use of sanitary sewer for disposal. Consult your local building and zoning
departments to assure compliance in your area prior to discharging water.
7.3 Coil Flushing Ports
It is recommended when installing your Geocool unit to have a “Tee” on the discharge water line
and the incoming water line from the well with a boiler type drain/hose bib on it between the unit
and the main isolation ball valves. This will allow for flushing of the coil in certain areas where
buildup or scaling can occur. See image below for an example.
7.4 Freeze Protection
The Freeze stat helps protect the liquid to refrigerant heat exchanger from freezing internally.
Freeze protection is accomplished by measuring the refrigerant temperature exiting the water
coil in the heating mode. If this temperature drops below the freeze set point temperature, the
unit will then lock out until manually reset.
On closed loop systems WITH ADEQUATE ANTIFREEZE, the tab labeled “ANTIFREEZE”
should be broken off, lowering the unit freeze setpoint to 20 degrees. Use a small pair of needle
nose pliers to break the tab (see image below).
On open loop systems, the tab MUST remain in place, giving the unit a 38 degree freeze
setpoint.
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