60
BOILER SEQUENCE OF OPERATION
A call for heat by the thermostat energizes the L8124C control which in turn energizes the primary control to turn on
the burner. The burner will operate in the following sequence: Prepurge for the fi rst 10 seconds; fi re until the thermo-
stat is satisfi ed or the limit setting on the high limit is reached; post-purge for the last 10 seconds. The circulator will
also operate when the thermostat calls for heat if the boiler water temperature is up to the setting of the low limit in the
L8124C control. If boiler water temperature is below the low limit setting the burner will operate but the circulator will
not, giving preference to the domestic hot water demand.
If the thermostat is not satisfi ed when the high limit is reached the burner will stop but the circulator will continue to
operate until the thermostat is satisfi ed. Any time the boiler water temperature drops below the setting of the low limit
the burner will be energized in order to maintain domestic water temperature.
On burner start, if the cad cell does not see fl ame within approximately 15 seconds, primary control will shut burner
down and enter into a recycle mode, after 60 seconds burner will restart and repeat trial for ignition. If after three
(3) trials for ignition, fl ame is not detected, control will enter into restricted mode and must be reset manually before
burner can be restarted.
Figure 23D: Wiring Diagram, Water with Rear Tankless Heater for Beckett Burners
Summary of Contents for V8 Series
Page 6: ...6 Figure 1A V82 thru V89 Water Boiler without Tankless Heater ...
Page 7: ...7 Figure 1B V83 thru V89 Water Boiler with Front Tankless Heater ...
Page 8: ...8 Figure 1C V83 thru V89 Water Boiler with Rear Tankless Heater ...
Page 9: ...9 Figure 1D V83 thru V89 Steam Boiler with or without Tankless Heater ...
Page 33: ...33 Figure 13A Recommended Water Piping for Circulator Zoned Heating System ...
Page 46: ...46 Figure 19A Wiring Diagram Steam Hydrolevel CG450 Probe LWCO for Carlin Burners ...
Page 47: ...47 Figure 19B Wiring Diagram Steam Hydrolevel CG450 Probe LWCO for Riello Burners ...
Page 49: ...49 Figure 20A Wiring Diagram Steam McDonnell Miller PS 801 Probe LWCO for Carlin Burners ...
Page 50: ...50 Figure 20B Wiring Diagram Steam McDonnell Miller PS 801 Probe LWCO for Riello Burners ...
Page 52: ...52 Figure 21A Wiring Diagram Steam McDonnell Miller 67 Float LWCO for Carlin Burners ...
Page 53: ...53 Figure 21B Wiring Diagram Steam McDonnell Miller 67 Float LWCO for Riello Burners ...
Page 55: ...55 Figure 22A Wiring Diagram Water without Tankless Heater for Carlin Burners ...
Page 56: ...56 Figure 22B Wiring Diagram Water without Tankless Heater for Riello Burners ...
Page 58: ...58 Figure 23B Wiring Diagram Water with Front Tankless Heater for Carlin Burners ...
Page 59: ...59 Figure 23C Wiring Diagram Water with Front Tankless Heater for Riello Burners ...
Page 62: ...62 Figure 23F Wiring Diagram Water with Rear Tankless Heater for Riello Burners ...
Page 82: ...82 Bare Boiler Assembly ...
Page 84: ...84 Bare Boiler Assembly Continued ...
Page 86: ...86 Jacket Assembly ...
Page 88: ...88 V83 Thru V89 Steam Boilers Trim and Controls ...
Page 90: ...90 V82 Thru V89 Water Boilers Trim and Controls ...
Page 92: ...92 Beckett AFG Burner ...