Burnham 20_PV_I Benutzerhandbuch

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 Gas-Fired Low-
Pressure Steam and Hot Water Boilers, ANSI Z21.13.

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.

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.