Owner Manual

9.2. Filling the Hot Water Tank
Close boiler drain valves and the isolation valves to the Geocool system. Open the cold water
supply feeding the DHW tank. Open a hot water tap in the building and allow air to bleed out of
the tank. Alternatively you can depress lever on the tank relief valve to remove air trapped in the
tank. Once the building plumbing is purged it is important to purge the air that is remaining in the
Geocool system and plumbing between the hot water tank and the Geocool system. Purging
the building plumbing even with the isolation valves open to the DHW lines will not purge
the air from the Geocool system.
9.2.1 Purging the air and debris from the DHW circuit
ALL air must be purged from the DHW lines before the unit can be run to make hot water.
Improper purging will result in air in the pump causing the pump to cavitate and damage the
pump. Units are shipped from the factory with biodegradable RV antifreeze pumped into the
DHW coil. If proper purging methods are followed this antifreeze will easily be purged from the
system.
9.2.2 Purging the Geocool Hot Water Lines
Attach a hose to the boiler drain A (refer to figure 5.2) and run the hose to a floor drain or
outside. Close the isolation valve A at the cold-water inlet on the DHW tank. Open the isolation
valve B at the bottom of the tank and allow the water to flow out the hose. Allow the water to run
for a few minutes while checking for air leaving the drain hose. Once all of the air has been
purged, close isolation valve B and open the isolation valve A. Allow the water to flow through
the system and out the hose. Run for approximately 5 to 10 minutes while checking for air
leaving the drain hose. To insure no air is trapped anywhere, open both valve A and valve B to
allow flow both ways. Allow water to run for approximately one minute. Once purging is
complete, close the boiler drain valve and remove the drain hose and ensure that both isolation
valves “A & B” are open.
10.0 Low & High voltage Connections
�Always use caution when working with or around electrical wiring or connections!�
When running high and low voltage wire into the electrical box always leave enough slack to
swing out or remove the electrical box. The electrical box can be swung outward by removing
one screw from the unhinged side of the box. Then if desired the box can be lifted to provide
easy access behind box. This only works if slack is left in the field wiring. ALWAYS TURN OFF
THE POWER TO THE UNIT BEFORE DOING THIS!!!
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