Burnham V8 Series manual Boiler Sequence of Operation with Float Lwco

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Figure 21: Wiring Diagram, Steam, McDonnell & Miller 67 Float LWCO for Beckett Burners

BOILER SEQUENCE OF OPERATION WITH FLOAT LWCO

When the thermostat calls for heat, it energizes the cad cell primary control, bringing on the burner. The burner will operate in the following sequence: Prepurge for the ﬁrst 10 seconds; ﬁre until the thermostat is satisﬁed or the limit setting on the high limit is reached; post-purge for the last 10 seconds. When the high limit control restores the circuit on a drop in pressure, the burner will start if the thermostat is still calling for heat. The low water cut-off will shut down the burner if the water level in the boiler drops too low. The control resets and restarts the burner with a call for heat a few seconds after the water is returned to its normal level.

On burner start, if the cad cell does not see ﬂame 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, ﬂame is not detected, control will enter into restricted mode and must be reset manually before burner can be restarted.

When there is no demand for heat, the operating control will maintain the boiler water temperature at the selected set- ting for proper operation of the domestic water heater, if equipped with optional tankless heater.

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Contents V8 Series USA Boilers Important Information Read CarefullyPage Table of Contents Dimensional Data see Figures 1A Thru 1D V82 thru V89 Water Boiler without Tankless Heater V83 thru V89 Water Boiler with Front Tankless Heater V83 thru V89 Water Boiler with Rear Tankless Heater V83 thru V89 Steam Boiler with or without Tankless Heater Section I PRE-INSTALLATION Page Section II Knockdown Boiler Assembly Removal of Bare Boiler from SkidDo not allow any flueway blockage by gasket Boiler Tapping Locations and Usage Knockdown Boilers Only Install Boiler JACKET. See Figure Knockdown Boiler Jacket AssemblyInstall Beckett OIL BURNER. See Figure Oil Burner Installation Beckett Burner ShownDo not install burner without gasket Install Carlin 102CRD OIL BURNER. See FigureSteam Boilers Only Water Boilers Only Combustion Head AdjustmentInstall Carlin Elite EZ OIL BURNER. See Figure Installation/Removal of Drawer Assembly Nozzle Replacement Install probe type Low Water Cut-Off Lwco if so equipped Aquastat bulb must be fully inserted into the well Float-Type Low Water Cut-Off Pressure Limit InstallationInstall Trim and Controls with Carlin 102CRD Burner Install Trim and Controls with Carlin Elite EZ Burner Install Trim and Controls with Riello BurnerBurners Supplied by Burnham utilize Page Do not drop boiler. Do not bump boiler jacket against floor Section III Packaged Boiler AssemblyRemove Crate Remove Boiler from SkidPage Page Steam or Water Boilers Inspect Nozzle and Electrodes Install Safety or Relief Valve in Tapping MEvaluate the Existing Water System Section IV Water Boiler Piping and TrimPage Recommended Water Piping for Circulator Zoned Heating System Page Page Evaluate the Existing Steam System Section V Steam Boiler Piping and TrimPage Section VI Tankless and Indirect Water Heater Piping GPM Connect Alliance Indirect Water Heater Piping as shown in B Alliance Water Heater Piping with V8 BoilerSection VII Venting and AIR Intake Piping General Venting GuidelinesDo not exceed maximum allowable air intake length Recommended Vent Pipe Arrangement and Chimney Requirements Seal all external joints with weatherproof caulk General Section Viii ElectricalBoiler Sequence of Operation with Probe Lwco Page Page Jumper Page Page Boiler Sequence of Operation with Float Lwco Page Page Boiler Sequence of Operation Page Page Boiler Sequence of Operation Page Page Boiler Sequence of Operation Page Page Single Pipe OIL Lines Section IX OIL PipingSINGLE-STAGE Units 3450 RPM TWO Pipe Systems TWO Pipe OIL LinesAlways Inspect Installation Before Starting Burner Section X System START-UPFill Heating System with Water Carlin Elite EZ Burners Adjust OIL Burner Before StartingBeckett Burners Carlin 102CRD BurnersAdjust OIL Burner While OPERATING. ﬂame present Riello BurnersStart OIL Burner L1 and V1 Head Electrode Test Controls Check for Clean CUT OFF of BurnerCAD Cell Resistance When Sensing Flame Jumper must be removed after this check Aquastat Switching Action Within L8124C ControlAquastat Switching Action Within L8148A Controls Avoid Breathing Fiber Particulates and Dust Maintenance of LOW Water CUT- OFF Devices Section XI Maintenance and Service InstructionsPage Gal/Month V83 V85 V87 V89 V84 V86 V88 14½ Frequent Water AdditionPage Clean the Combustion Chamber Section XII Boiler CleaningClean the Flueways See Figure Clean TOP of Boiler Sections if cleaning from the topCleaning of Boiler Flueways Section Xiii Trouble Shooting CombustionOIL Primary Control Section XIV Repair Parts Bare Boiler Assembly Bare Boiler Assembly Bare Boiler Assembly 1BB Bare Boiler AssemblyJacket Assembly Page V83 Thru V89 Steam Boilers Trim and Controls V83 Thru V89 Steam Boilers Trim and Controls V82 Thru V89 Water Boilers Trim and Controls V82 Thru V89 Water Boilers Trim and Controls Beckett AFG Burner Beckett OIL Burner Part NOS. for V8 Series Boilers Beckett OIL Burner Part NOS. for V8 Series Boilers Carlin OIL Burner Part Numbers for V8 Series Boilers Burner Specifications When XV. LOW Water CUT OFF LwcoService Record Limited Warranty For Residential Cast Iron Steam Boilers