Burnham 1100-H4 Benutzerhandbuch

  Sequence of Operation. See Figure 39. If boiler fails 

to operate properly, see Troubleshooting Tree in Section 

IX:  Service.

  Check pilot burner flame. See Figure 41. Flame 

should be steady, medium hard blue enveloping 3/8 to 

½ inch of sensing probe.

  Check main burner flame. See Figures 40.  Flame 

should have clearly defined inner cone with no yellow 

tipping. Orange-yellow streaks should not be confused 

with true yellow tipping.

.  Check thermostat operation. Raise and lower 

temperature setting to start and stop boiler operation.

 Check ignition control module shut-off. Disconnect 

pilot lead wires from gas valve.  If burners do not 

shutdown, determine cause of malfunction.  Replace 

necessary items and check operation.

  Check low water cutoff (if so equipped).

1.  Adjust thermostat to highest setting.
2.  With boiler operating, open drain valve and slowly 

drain boiler.

3.  Main burners and pilot burner will extinguish and 

blower will stop when water level drops below low 

water cutoff probe. Verify limit, thermostat or other 

controls have not shut off boiler.

4.  Adjust thermostat to lowest setting. Refill boiler.