Weil-McLain GOLD CGt Manual page 13

GOLD CGt Gas-Fired Water Boiler — Boiler Manual
2b
Prepare boiler — pressure test
Perform hydrostatic pressure test
Pressure test boiler
supply.
Prepare boiler for test
1. Remove the shipping nipple (from CGt supply tapping) and remove the boiler relief valve.
Temporarily
2. Remove 1¼" nipple, reducing tee and drain valve from circulator hardware bag. Install in
boiler return connection as shown on page 3 and
return side.
3. Remove 1¼" nipple, 1¼" x 1¼" x 1" tee from circulator hardware bag and pressure/temperature
gauge from inducer carton. Pipe to boiler supply connection as shown on page 3 and
, page 60. (Use pipe dope sparingly.)
39
4. Connect a hose to boiler drain valve, the other end connected to a fresh water supply. Make
sure hose can also be used to drain boiler after test.
5. Connect a nipple and shutoff valve to system supply connection on the 1¼" tee. This valve will
be used to bleed air during the fill. (Valve and nipple are not included with boiler.)
6. Connect a nipple and shutoff valve to system return connection (at circulator flange if circulator
installed on return). This valve will be used to bleed air during the fill. (Valve and nipple are
not included with boiler.)
Fill and pressure test
1. Open the shutoff valves you installed on supply and return connections.
2. Slowly open boiler drain valve and fresh water supply to fill boiler with water.
3. When water flows from shutoff valves, close boiler drain valve.
4. Close shutoff valves.
5. Slowly reopen boiler drain valve until test pressure on the pressure/temperature gauge reaches
no more than:
•
45 psig
6.
Test for no more than 10 minutes at
•
45 psig
7. Make sure constant gauge pressure has been maintained throughout test. Check for leaks.
Repair if found.
Drain and remove fittings
1. Disconnect fill water hose from water source.
2. Drain boiler at drain valve or out hose, whichever provides best access to drain. Remove hose
after draining if used to drain boiler.
3. Remove nipples and valves unless they will remain for use in the system piping.
4. Remove plug from relief valve tapping. See section
Part Number 550-110-290/0501
attaching water or gas piping (except as noted below) or electrical
before
plug the relief valve tapping with a ¾" NPT pipe plug.
for boilers with
30 psig relief valve.
:
for boilers with
30 psig relief valve
Do not leave boiler unattended.
excessive pressure, resulting in severe personal injury, death or substantial
property damage.
Leaks must be repaired at once.
in substantial property damage.
Do not use
petroleum-based
Severe damage to boiler will occur, resulting in substantial property damage.
, page 60. Install circulator on the
Figure 39
.
A cold water fill could expand and cause
Failure to do so can damage boiler, resulting
cleaning or sealing compounds in boiler system.
, page 20 to replace relief valve.
4a
Figure
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