Figure 10: Wiring Diagram
VII. System Start-up
A.Safe operation and other performance criteria were met with gas manifold and control assembly provided on boiler when boiler underwent tests specified in American National Standard for
B.Fill heating system with water and vent air from system. Use the following procedure on a Series Loop System equipped with zone valves. See Figure 3.
1.Close isolation valve in boiler supply piping.
2.Isolate all circuits by closing zone valves or balancing valves.
3.Attach hose to bib cock located just below isolation valve in boiler supply piping. Terminate hose in five gallon bucket at a suitable floor drain or outdoor area).
4.Starting with one circuit, open zone valve.
5.Open bib cock.
6.Open fill valve. Makeup water line should be located directly above isolation valve in boiler supply piping.
7.Allow water to overflow from bucket until discharge from hose is bubble free for 30 seconds.
8.Open zone valve to second zone to be purged, then close first. Repeat this step until all zones have been purged, but always have one zone open. At completion, open all zone valves.
9.Close bib cock, continue filling system until pressure gauge reads 12 psi. Close fill valve.
Note: If makeup water line is equipped with pressure reducing valve, system will automatically fill to 12 psi. Leave globe valve open.
10.Open isolation valve in boiler supply piping.
11.Remove hose from bib cock.
C.Check main burners. See Figure 11. Rear of burner must be in vertical slot in rear of burner tray. Front of burner must be seated on orifice.
