Installation Guide

The tank pressure should be checked annually for proper system operation.
This is done by closing the expansion tank ball valve, removing drain cap,
attaching a drain hose and opening the drain valve. A small amount of
water/pressure will come out. This isolates the tank from the system and
removes any residual system pressure. Check the tank pressure and add pressure
if necessary. Close drain valve, disconnect hose, replace cap, and open expansion
ball valve. The system is ready to use.
7. Initial system fill.
Open all of the ball valves to the zone manifolds and boiler. There is a little
brass cap on the top of the air eliminator on the control panel. Loosen the cap
slightly to allow air in the system to be purged. Open the water supply ball valves.
This operation will fill most of the system with water and should take only a few
minutes. Once the system pressure on the control panel is about 15 to 20 psi, the
pressure reducing valve will automatically shut off the water supply. Shut off the
water supply ball valve and close the air eliminator vent cap.
8. System purge.
It is important that all air is removed from the system before start up. Air
in the system can cause corrosion of components, noise, and cold zones. A
properly purged system will be almost silent in operation. Referring to the
appropriate panel schematic in the appendix, there are two purge/fill diagrams in
the upper right-hand corner. These diagrams show the proper ball valve
orientation to first purge the low temperature zone manifold side and then purge
the boiler side last.
A simple setup to use for system purge is a high-flow submersible pump, 5-
gallon bucket, (2) 1" hoses about 6' long, and the necessary fittings. Plumb the
submersible pump discharge with one of the 1" hoses into the in-ball drain port as
noted on the schematic. Plumb the second 1" hose to the out-ball drain port as