Prepare boiler — pressure test
2b
13
Part Number
550-110-290/0219
CGt
GAS-FIRED WATER BOILER — Series 2 —
Boiler Manual
Hydrostatic pressure test
Pressure test boiler
before
attaching water or gas piping
(except as noted below) or electrical supply.
Prepare boiler for test
1.
Remove the shipping nipple (from CGt supply
tapping) and remove the boiler relief valve.
Temporarily
plug the relief valve tapping with a ¾”
NPT pipe plug.
2. Remove 1¼” nipple, reducing tee and drain valve
from circulator hardware bag. Install in boiler return
connection as shown on page 3 and Figure 38,
page 64. Install circulator on the return side.
3. Remove 1¼” nipple, 1¼” x 1¼” x 1” tee from circula-
tor hardware bag and pressure/temperature gauge
from inducer carton. Pipe to boiler supply connec-
tion as shown on page 3 and Figure 38, page 64. (Use
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 re-
turn 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 sup-
ply 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
for boilers with
30 psig relief valve
.
•
75 psig
for boilers with
50 psig relief valve
.
6.
Test for no more than 10 minutes at:
•
45 psig
for boilers with
30 psig relief valve
.
•
75 psig
for boilers with
50 psig relief valve
.
Do not leave boiler unattended.
A cold water fill could expand and
cause excessive pressure, resulting
in severe personal injury, death or
substantial property damage.
7. Make sure constant gauge pressure has been main-
tained 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
petroleum-based
clean-
ing 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, 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 page 20
to replace relief valve.
