Technical data

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4. Attach the third hose (blue) to valve “C” located above

the primary circulator. Put the other end into the ﬁ ll tub.

This valve “C”should be open allowing water to circulate

through the ﬂ oor and all of the loops back to the bucket

where it started. The bucket must have ﬂ uid in it at all times

while ﬁ lling. As the water returns the ﬂ uid may be milky,

this is air in the solution. The ﬂ uid must be circulated until

all air is removed and the water runs clear.

5. The ball valve “D” located on the upper ﬂ ange should be

closed during ﬁ lling and Open when in operation.

6. If this is a primary/secondary system (2 pumps on the

main panel) the purge valve should be in the vertical

position “E” while ﬁ lling. This forces the ﬂ uid through the

ﬂ oor, and prevents ﬂ ow to the primary loop during the ﬁ lling

process. After the system is ﬁ lled make sure that the purge

valve “E” is open and in a horizontal position.

Note: If you have a Calefﬁ differential by-pass kit on your

manifold you need to attach the ﬁ ll hose to “C” and the discharge

hose to”A’. This reverses the ﬂ ow and allows you to still purge

each loop individually and not open the by pass while ﬁ lling.

FILLING HOSE CONNECTIONS

IV. DOMESTIC WATER FORCED FILL

A. Domestic water forced ﬁ ll procedure

1. Attach the ﬁ ll hose to the domestic city water supply, attach the other end to the gate valve”A” on the

bottom ﬂ ange of the primary circulator.

2. Attach the discharge hose to the gate valve “C” on the upper ﬂ ange of the primary circulator. The

other end of the discharge hose should be submerged in water prior to going into a drain.

3. Fill the system, watch for air bubbles in the discharge water.

4. Open each loop individually so the air can be purged from each loop separately. Watch your tub to

see if any air bubbles are coming out of the solution while ﬁ lling.

5. When no bubbles are seen, close the discharge line. When the pressure comes to 15-25 lbs, turn

off the ﬁ ll valve and shut off the water.