Start-Up - Weil-McLain GOLD CGt Manual

GOLD CGt Gas-Fired Water Boiler — Boiler Manual
7a
Start-up — preparation
Check for gas leaks
Determine if water treatment
is needed
Verify water chemistry
Consult local water treatment companies for unusually
hard water areas (above 7 grains hardness) or low pH
water conditions (below 7.0). Boiler water pH of 7.0 to
8.5 is recommended.
Freeze protection (when used)
Use antifreeze made especially for hydronic systems.
Inhibited propylene glycol is recommended.
1. Determine
water content. Boiler water content is listed on page 63.
Remember to include expansion tank water content.
2. Follow antifreeze manufacturer's instructions.
3. A 50% solution of propylene glycol/water provides
maximum protection to about -30 °F.
4. Local codes may require
disconnect from city water supply.
5. When using antifreeze in a system with automatic fill,
install a water meter to monitor water makeup. Glycol
will leak before the water begins to leak, causing glycol
level to drop. Added water will dilute the antifreeze,
reducing the freeze protection level.
30
Before starting the boiler, and during initial operation, smell near the floor and around the
boiler for gas odorant or any unusual odor. Do not proceed with start-up if there is any
indication of a gas leak. Repair any leak at once.
Do not use
petroleum-based
cleaning or sealing compounds
boiler system. Severe damage to
boiler will occur, resulting in
substantial property damage.
Eliminate all system leaks.
Continual fresh makeup water will
reduce boiler life. Minerals can
build up in sections, reducing heat
transfer, overheating cast iron, and
causing section failure.
Do not use
ethylene glycol,
automotive or undiluted antifreeze
Severe personal injury or death can
result.
according to system
antifreeze quantity
back flow preventer
Fill the system with water
1. Close manual and automatic
drain cock.
in
2.
Fill to correct system pressure.
vary with 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
pages 21 through 25,
Figure 21
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
automatic air vent
or actual
bladder-type expansion 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.
and boiler
air vents
Correct pressure will
, in suggested piping diagrams on
6
through
Figure 16
). Route hose to an area where water
(diaphragm-type or
Part Number 550-110-290/0501