09/17/2014
7
BI308
6.
Open
"water supply valve" and
open
household water supply source.
This may be at normal household pressure (4Ø to 6Ø PSI), the auto-fill value regulator keeps
the hydronics loop at its proper low pressure.
7.
Allow system to circulate, discharging through drain valve,
for at least 1Ø minutes
.
8.
Put your ear against the metal pipe and listen for air bubbles. If the water flow is consistent and quiet, the
system is probably purged and water filled.
9.
Close
the "drain valve".
Open
the "inlet gate valve".
10.
The cold system pressure at the gauge should be approximately 1Ø to 14 PSI.
11.
Close
"water supply valve" and disconnect water supply.
12.
Optional – The circulating pump can be energized during this fill operation by having the 240 power main
source breaker off and simply jumpering the 2 screw terminals for the pump wire connection.
Figure 1
