Weil-McLain CGi Series 3 Installation And Maintenance Manual page 33

CG i
GAS-FIRED wATER BOILER- sERIEs a -
Boiler Manual
7a
Start-up - preparation
(continued)
Fill the system with water
I. Close manual and automatic air vents and boiler drain cock.
2.
Fill to correct system pressure. Correct pressure will
vary
with each
application. Typical cold water fill pressure for a residential system is
12
psi.
3. Purge air from system:
a. Connect a hose to the purge valve (see
drai11 valves,
item
6,
in
suggested piping diagrams on pages
23
through
27,
Figure
18
through Figure
23).
Route hose to an area where water can drain
and be seen.
b. Close the boiler or system isolation valve between the purge valve
and
fill cOJmection 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 purgecl
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 o ut Repeat with remaining vents.
4.
Open automatic air vent (diaphragm-type or bladder-type expansion
tank systems only) one tum.
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.
Part Number 550-142-780/0712
Inspect system water piping
After filling the boiler and system with water, Inspect all
piping throughout the system for leaks. If found, repair
immediately. Repeat this inspection after the boiler has
been started and the system has heated up.
I&
WARNING!
ftjHddijj;l
Leaks must
be
repaired at once.
Failure to do so can damage the
boiler, resulting in substantial prop-
erty dan1age.
Do not use petroleum -based
cleaning or sealing compounds
in boiler system. Severe dan1age to
boiler will occur, resulting in sub-
stantial property damage.
Inspect base insulation
I&
WARNING!
I& WARNINGI
The boiler contains ceramic fiber
and fiberglass materials. Use care
when handling these materials per
instructions on Page 70 of this
manual. Failure to comply could
result in severe personal injury.
Failure to replace damaged insu-
lation or reposition insulation can
result in a fire hazard, causing severe
personal injury, death or substantial
property damage.
Check to make sure
base
Insulation Is secure against
all four sides of the base. If insulation is damaged or
displaced, do not operate boiler. Replace or reposition
insulation.
33