Installation Guide

noted on the schematic. This second hose returns to the 5-gallon bucket. With
the pump in the bucket, fill the bucket with clean water.
Each of the ball drain valves have two ball valves. The ball valve where the
hose attaches, simply opens and closes the line. The second ball is actually a 3-
way valve, which can direct water flow straight through or one direction or the
other. The ball valve handle decal indicates flow direction.
To purge the low temperature side, orient the 3-way valve as shown on the
purge/fill diagram. Plug in the submersible pump and slowly open both of the
inlet ball valves on the ball drain valves. Water should be now flowing through
the system and returning to the 5-gallon bucket. The return water will have a
considerable amount air coming out as well. Continue running the pump until
most of the air is removed. This may be several minutes. Make sure the water
level in the bucket does not get too low and add water as needed.
Now each zone and loop must to purged separately to ensure all air is
removed. Slowly shut the ball valves to all the zone manifolds except for one.
Now all the water flow should be going through the one open zone manifold. At
the zone supply manifold, slowly close all the loop-ball valves on the supply
except one loop. Now all water flow will be flowing through a single loop.
Continue running the pump until the return water is free of air bubbles. Slowly
open the next loop ball valve and close the first loop ball valve. This method of
opening and closing loop ball valves isolates each loop forcing all air from the
system. Once a loop manifold is complete, open all loop ball valves. At the
control panel slowing open the next zone loop ball valve and close the previous.
Proceed as before opening and closing loop zones at the supply manifold until all
air is eliminated. When all zones and loops have been purged of air, open all zone
and loop ball valves. Water should continue to be flowing through the system.
Quickly close both of inlet ball valves on the ball drain valves. Turn off the pump.
The low temperature air purge is now complete.
To purge the boiler side, reverse the flow of the drain valves 3-way ball
valves as noted on the second purge/fill diagram. Make sure any air vent on the