Part number 550-100-180/0917
13
Prepare boiler
(continued)
3. Att ach a water supply and hand pump to the lower valves.
4. Att ach a drain line to the upper valve.
5. Remove the pressure & temperature gauge from the trim box shipped
with the boiler.
6. Remove the factory-installed plug from the ½-inch tapping on top of
the boiler supply pipe.
7. Apply pipe dope to the P/T gauge and install in the ¼” tapping as shown.
Fill boiler and pressure test
1. Open the shutoff valves installed on the supply and return connections.
2. Allow water to fl ow into the bott om connection and air to fl ow out the
top connection.
3. When water reaches the shutoff valve on top, allow water to fl ow long
enough to ensure all air is out of the heat exchanger. Th
en close the
upper shutoff valve.
4. Close
off the water supply and use the hand pump to raise the water
pressure for testing.
5. Th
e test pressure should be 1½ times the pressure sett ing of the relief
valve to be installed on the boiler (45 psig for a 30-psig relief valve;
75 psig for a 50-psig relief valve; or 150 psig for a 100-psig relief valve).
Th
e test pressure MUST NOT exceed the maximum pres-
sure on the P/T gauge. If test pressure will be higher than the
maximum range of the P/T gauge, use a diff erent gauge for
the test.
6. Gradually apply pressure until test pressure is reached. Th
en close off
the shutoff valve.
7. Hold at test pressure for 10 minutes.
Do not leave boiler unatt ended. A cold water fi ll could expand
and cause excessive pressure, resulting in severe personal
injury, death or substantial property damage.
8. Make sure that constant gauge pressure has been maintained through-
out test.
9. Check for leaks. Repair if found.
,EAKS MUST BE REPAIRED AT ONCE
Failure to do
so can damage boiler, resulting in substantial property
damage.
$ONOTUSEPETROLEUMBASED
cleaning or sealing
compounds in boiler system. Gaskets and seals in the
system may be damaged. Th
is can result in substantial
property damage.
Drain and remove fi ttings
1. Disconnect fi ll water hose from water source.
2. Open upper shutoff valve.
3. Drain boiler through lower shut-off valve.
4. Remove hose or drain piping aft er draining.
5. Remove the blanking fl ange/valve assemblies from the boiler supply
and return fl anges.
6. See page 14 to install relief valve in the 1¼” tapping on top of the boiler
outlet pipe.
&IGURE
Hydrostatic test piping connections —
fl anges, valves and gaskets provided by
installer
&IGURE
Boiler drain valve tapping – optional
location for drain valve
¾-inch
drain valve
tapping
SlimFit
®
Series 2
COMMERCIAL
CONDENSING
GAS
-
FIRED
WATER
BOILER
—
Boiler Manual
Boiler drain valve
(provided by installer)
1. If not installing a drain valve off of the return piping, install a
¾-inch boiler drain valve in the ¾-inch tapping at the lower
right burner end of the heat exchanger (see Figure 10 ).
