Owner's manual

STARTING YOUR BOILER

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.

• Close drain ﬁ tting on air bleed screw.

• 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 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, this 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. indicates

loss of water due to leakage. Automatic ﬁ ll valve should

compensate for this. Instructions are packaged with valve.

NOTICE

Never run water in a hot empty boiler.