2
Prepare boiler (continued)
Perform hydrostatic pressure test
Pressure test boiler before permanently attaching water or gas piping or electrical supply.
Prepare boiler for test
1.See Figure 3 for reference in following steps.
2.Remove supply line tee* and ¾” street elbow from accessory bag. Pipe to boiler supply connection as shown. Use pipe dope sparingly. (*1" x 1" x ¾" tee with
3.Temporarily plug the ¾" relief valve tapping in the street elbow with a ¾" NPT pipe plug.
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 supply tee. This valve will be used to bleed air during the fill. (Valve and nipple are not included with boiler.)
6.Connect a shutoff valve to system return connection. (Valve is not included with boiler.)
7.To avoid getting water on boiler, you may want to pipe street elbows on top of shutoff valves and attach
8.If convenient, install the boiler circulator and any other piping compatible with Figure 3 that would still allow bleeding air from shutoff valves. Follow guidelines in this manual for piping components, locations and sizing.
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. The boiler will fill quickly because of its low water content.
3.When water reaches 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 at least 45 psig, but no higher than 55 psig.
6.Hold at test pressure for 10 minutes.
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 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
Drain and remove fittings
1.Disconnect fill water hose from water source.
2.Drain boiler through drain valve. Remove hose after draining.
3.Remove nipples and valves unless they will remain for use in the system piping.
4.Remove plug from relief valve street elbow. See section 3 (page 12) to install relief valve.
Figure 3 Hydrostatic test piping connections
Part number | 11 |