Install 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 which will cause 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 ensure 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 , then 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!!!
The electrical box cover has a small tab that when rotated 90 degrees to a vertical position will
allow the cover to swing downward on a hinge.
Page 19