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CGi
SERIES 4 — GAS-FIRED WATER BOILER —
7a
Start-up — preparation
Fill the system with water
1. Close manual and automatic
2.
Fill to correct system pressure.
each application. Typical cold water fill pressure for a residential
system is 12 psi.
3.
from system:
Purge air
a. Connect a hose to the purge valve (see drain valves, item
, in suggested piping diagrams on pages 23 through 27,
6
through
Figure 18
Figure 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 proce-
dure 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 through-
out the system.
i. If purge valves are not installed in system, open manual
air vents in system one at a time, beginning with low-
est floor. Close vent when water squirts out. Repeat with
remaining vents.
4. Open
automatic air vent
sion tank systems only) 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.
Part Number 550-142-302/0124
Boiler Manual
and boiler drain cock.
air vents
Correct pressure will vary with
). Route hose to an area where
(diaphragm-type or bladder-type expan-
(continued)
Inspect system water piping
After filling the boiler and system with water,
throughout the system for leaks. If
spect all piping
found, repair immediately. Repeat this inspection
after the boiler has been started and the system
has heated up.
Leaks must be repaired at once.
Failure to do so can damage the
boiler, resulting in substantial
property damage.
Do not use
cleaning or sealing compounds
in boiler system. Severe damage
to boiler will occur, resulting in
substantial property damage.
Inspect base insulation
The boiler contains ceramic
fiber and fiberglass materials.
Use care when handling these
materials per instructions on
page 71 of this manual. Failure
to comply could result in severe
personal injury.
Failure to replace
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
place or reposition insulation.
in-
petroleum-based
damaged insu-
operate boiler. Re-
33
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