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FILLING SYSTEM WITH WATER
•
Close air vents on all radiation units. Open valves
to these units.
•
Verify boiler and expansion tank drain valves are
closed.
•
Air bleed screw on tank drain fi tting should be
closed.
•
Open valve in line from boiler to expansion tank.
Open water inlet to your boiler and leave it open.
Start with lowest radiation unit. Open air vent
on this unit. When all air has escaped and water
starts to fl ow from vent, close it.
•
Go to next radiation unit, and repeat this process.
Repeat until you have covered every radiation
units in the system (ending up at highest unit in
system).
•
If your units have automatic vents, manual
venting is unnecessary but it will speed up the
proper fi lling of your system.
•
If your system is closed expansion tank
system, you may leave it open to refi ll system
automatically as needed.
•
Check temperature pressure gauge. Not position of
hand indicating pressure. This should be between
10 and 15 psi. Any lowering of this movable hand
below 10 psi. Will indicate loss of water due to
leakage. Automatic fi ll valve should compensate
for this. Instructions are packaged with the valve.
12 -GENERAL INSTRUCTIONS
Never run water in a hot empty boiler.
19
NOTICE
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