Weil-McLain GOLD CGa Installation And Maintenance Manual page 29

Boiler Manual
Fill the system with water
1. Close manual and automatic
2.
Fill to correct system pressure.
cold water fill pressure for a residential system is 12 psi.
3.
Purge air
a. Connect a hose to the purge valve (see drain valves, item
on pages 17 through 23,
water can drain and be seen.
b. Close the boiler or system isolation valve between the purge valve and fill connection
to the system.
c. Close zone isolation valves.
d. Open quick-fill valve on cold water makeup line.
e. Open purge valve.
f. One zone at a time, open the isolation valves. Allow water to run through the zone,
pushing out the air. Run until no noticeable air flow is present. Close the zone isolation
valves and proceed with the next zone. Follow this procedure until all zones are purged.
g. Close the quick-fill water valve and purge valve and remove the hose. Open all isolation
valves. Watch that system pressure rises to correct cold-fill pressure.
h. After the system has operated for a while, eliminate any residual air by using the manual
air vents located throughout the system.
i. If purge valves are not installed in system, open manual air vents in system one at a
time, beginning with lowest floor. Close vent when water squirts out. Repeat with
remaining vents.
4. Open
one turn.
5. Open other vents:
a. Starting on the lowest floor, open air vents one at a time until water squirts out.
b. Repeat with remaining vents.
6. Refill to correct pressure.
Inspect system water piping
After filling the boiler and system with water,
leaks. If found, repair immediately. Repeat this inspection after the boiler has been started and
the system has heated up.
Leaks must be repaired at once.
property damage.
Do not use
to boiler will occur, resulting in substantial property damage.
Part Number 550-110-593/1099
air vents
Correct pressure will vary with each application. Typical
from system:
Figure 9
automatic air vent (diaphragm-type or bladder-type expansion tank systems only)
Failure to do so can damage the boiler, resulting in substantial
petroleum-based cleaning or sealing compounds
and boiler drain cock.
, in suggested piping diagrams
6
through ). Route hose to an area where
Figure 16
throughout the system for
inspect all piping
in boiler system. Severe damage
29