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CGi
SERIES 4 — GAS-FIRED WATER BOILER —
2b
Prepare boiler — pressure test
Hydrostatic pressure test
Pressure test boiler
piping (except as noted below) or electrical supply.
Prepare boiler for test
1. Remove the shipping nipple (from CGi supply
tapping) and remove the boiler relief valve.
Temporarily
a ¾" NPT pipe plug.
2. Remove 1¼" nipple, reducing tee and drain
valve from circulator hardware and pressure/
temperature gauge carton. Install in boiler
return connection as shown on page 3 and
Figure 42
the return or supply.
3. Remove 1¼" nipple, 1¼" x 1¼" x ½" tee and
pressure/temperature gauge from circulator
hardware and pressure/temperature gauge
carton. Pipe to boiler supply connection as
shown on page 3 and
pipe dope sparingly.)
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 circula-
tor 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.
Part Number 550-142-302/0124
Boiler Manual
attaching water or gas
before
plug the relief valve tapping with
, page 67. Install circulator on either
, page 67. (Use
Figure 42
4. Close shutoff valves.
5. Slowly reopen boiler drain valve until test
pressure on the pressure/temperature gauge
reaches no more than:
•
for boilers with
45 psig
•
for boilers with
75 psig
6.
Test for no more than 10 minutes at:
•
for boilers with
45 psig
•
for boilers with
75 psig
Do not leave boiler unattended.
cold water fill could expand and
cause excessive pressure, re-
sulting in severe personal injury,
death or substantial property
damage.
7. Make sure constant gauge pressure has been
maintained throughout test. Check for leaks.
Repair if found.
Leaks must be repaired at once.
Failure to do so can damage
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.
Drain and remove fittings
1. Disconnect fill water hose from water source.
2. Drain boiler at drain valve or out hose, which-
ever 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
page 20 to replace relief valve.
.
30 psig relief valve
.
50 psig relief valve
.
30 psig relief valve
.
50 psig relief valve
A
petroleum-based
13
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