Burnham Series 2B manual Sequence of Operation Normal Operation, Safety Shutdown

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Figure 14: Wiring Diagram, Electronic Ignition (EI), Continuous or Gravity Circulation

SEQUENCE OF OPERATION

NORMAL OPERATION

1.When the thermostat calls for heat the vent damper opens (see Paragraphs 17A through 17D). When the damper blade reaches the fully open position, the ignition module is energized opening the pilot valve and energizing the igniter to ignite the pilot burner.

2.Sensor proves presence of pilot flame. Main valve opens to ignite main burners.

3.The burners will operate until the thermostat is satisfied.

4.When thermostat is satisfied, ignition module is de- energized, extinguishing pilot and main flame. If boiler is equipped with circulator, circulator will continue to run. Vent damper closes (see Para-graph 17E).

SAFETY SHUTDOWN

1. Limit: Automatically interrupts main burner operation when water temperature exceeds set point. Maximum allowable temperature is 250°F. Normal operation resumes when water temperature falls below set point.

2. Blocked Vent Switch: Automatically interrupts main burner operation when excessive vent system blockage occurs. Control is a multiple use device. If blocked vent switch is activated do not attempt to place boiler in operation. Correct source of blockage and reset blocked vent switch.

3. Flame Roll-out Switch: Automatically interrupts boiler operation when flames or excessive heat are present in vestibule. Control is single use device. If flame roll-out switch is activated do not attempt to place boiler in operation. Correct source of blockage and replace flame roll-out switch.

4. Igniter/Sensor: senses pilot flame and causes ignition module to turn off main burner and pilot burner gas flow should pilot burner flame extinguish. Five to six minutes after shutdown, ignition module restarts ignition sequence.

5.For Electronic Ignition Trouble Shooting Guide, see Page 25 of this manual.

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Contents Series 2 model B Price $3.00Table of Contents Weight Do not drop boiler. Do not bump boiler jacket against floor ClearancesMinimum Clearances Specific Gravity Correction Factors for Natural Gas Equivalent Length of FittingsBoiler Piping Page Page Do not use one vent damper to control two heating appliances Page Wiring Diagrams and Heat Anticipator Settings Page Safety Shutdown Sequence of Operation Page Sequence of Operation Normal Operation Wiring Schematic, Zone Valves II. Operating Instructions Top View of VR Gas Valves Instructions to PUT the Boiler in Operation Yellow LED Flame CodesGreen LED Status Codes Lighting Instructions Check GAS Input Rate to Boiler Check Pilot Burner FlameCheck Ignition System Safety SHUT-OFF Device Combustion Chamber BURN-OFFIII. Trouble Shooting IV. Service Burner 40mm Burner Pilot Burner LocationAvoid Breathing Fiber Particulates and Dust Repair Parts Section Assembly Gravity Circulation OnlySection Assembly and Canopy Group Canopy GroupThis page Left Intentionally Blank Base Assembly USS Manifold and Main Burners Inch Main Burners Manifold and Main Burners 1 Inch Main Burners Only MM Main Burners Only Manifold and Main Burners 40mm Main Burners4B MM Main Burner, Electronic Ignition Only MM Main Burners Only 4C MM Main Burner Manifold 4D MM Main Burner, Natural Gas, 2001-5000 Ft. USA Only4D MM Main Burner, LP Gas, 2001-5000 Ft. USA Only 4D MM Main Burner, Natural Gas, 5001-9000 Ft. USA OnlyBurner Only 40mm Burner Only Pilot Burner, Honeywell Q327A1147 Pilot Burner, Honeywell Q348A1002 Jacket Assembly, Complete Jacket AssemblyPage Jacket Vestibule Panel Water Trim Limit Control Transformer/Relay Assembly Intermittent Circulation Only Flame Rollout SwitchBlocked Vent Switch Transformer Continuous and Gravity Circulation OnlyVent Damper Draft Hood CartonVent Reducer Service Record Service Record Service Record Wiring of Typical Lwco Lwco LocationLimited Warranty
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