Burnham 8H manual

Page 47

6.Electronically Supervised Intermittent Ignition (EP/EP-CSD-1) Sequence of Operation

a.Normal Operation

i.Thermostat or operating control calls for heat.

ii.Terminal #6 of RM7890A Burner Control is energized, initiating a microcomputer monitored circuit test.

iii.The pilot valve (terminal 8) and ignition transformer (terminal 10) are energized. The pilot valve opens and the ignition electrode sparks, igniting the pilot.

iv.After the pilot flame is proven, the ignition terminal (10) is de-energized and the main valve terminal (9) is energized, allowing main gas flow and ignition of main burners.

“Main” gas light will be illuminated.

v.When the call for heat ends, terminal #6 is de-energized, extinguishing the pilot and main flames. “Main” gas light is de- energized.

b.Safety Shutdown

i.Limit: Automatically interrupts main burner operation when water temperature exceeds set point. Maximum allowable temperature is 250°F. Circulator continues to operate with call for heat. Normal operation resumes when water temperature falls below set point.

ii.Blocked Vent Switch: Automatically interrupts main burner operation when excessive flue gas spillage occurs.

Circulator continues to operate with call for heat. If blocked vent switch is activated, do not attempt to place boiler in operation. Correct cause of spillage and reset blocked vent switch.

iii.Flame Roll-out Switch: Automatically interrupts main burner operation when flames or excessive heat are present in vestibule. Circulator continues to operate with call for heat. Control is single use device. If flame roll-out switch is activated, do not attempt to place boiler in operation.

Correct cause of spillage and replace flame roll-out switch.

iv.RM7890A Burner Control: Automatically interrupts main burner operation if a pilot flame is not detected during the four or ten second pilot flame establishing period. The

RM7890A will lockout or recycle based on jumper settings. “Alarm” light will be illuminated. Refer to instructions supplied with RM7890A for additional control information.

47

Image 47

Contents 81416021R3-6/10 Price $5.00 Series 8HImportant Information Read Carefully Page Table of Contents Dimensional Data Boiler Model Special Base Part Number Pre-InstallationPage Remove Crate II. Boiler AssemblyDo not use air to leak test boiler Installation of Special Base for Combustible FlooringGeneral Assembly Knockdown Boilers Flame Roll-out Switch Installation Install Jacket. See Figure Jacket Assembly EP/OP Control Installation III. Gas Control System Assembly Knockdown Boilers Page Schematic Gas Piping, 24V Standing Pilot, 806H & 807H Main Gas Piping, Intermittent Ignition EI Schematic Pilot Piping Honeywell EI, USA Page Schematic Gas Piping, OP Control System, 806H 810H Schematic Gas Piping, OP-CSD-1 Control System, 808H 810H Page Schematic Gas Piping, EP-CSD-1 Control System, 808H 810H IV. Water Trim and Piping Flow Rate, Temperature Rise, and Pressure DropDrain Piping Installation Page Page Connect boiler gas valve to gas supply system Gas PipingRated Input Specific Gravity Correction Factors Equivalent Lengths of Standard Pipe Fittings & ValvesVI. Venting Blocked Vent Switch InstallationBoiler Equipped With Vent Damper. See Figure Vent Damper InstallationTypical Vent System If an Existing Boiler is RemovedVII. Electrical Install Boiler WiringHeat Anticipator Settings Sequence of Operation and Wiring Diagrams Page Page Page Page Page Page Wiring Diagram, Honeywell EI, USA, Continuous Circulation Wiring Diagram, Honeywell EI, USA, Intermittent Circulation Wiring Diagram, Honeywell EI, Canada, Continuous Circulation Page Page Page Page Page Page VIII. System Start-Up Lighting Instructions 24V Standing Pilot Operating Instructions EI Lighting Instructions OP Operating Instructions EP Boiler Operating Instructions To Shut Down Honeywell Q314 Pilot Flame 24V Standing Pilot Input Rate Adjust gas input rate to boiler. Natural GasCheck Limits Combustion Chamber Burn-Off Adjust gas input rate to boiler. LP/PropaneClean Heating System Install Front Removable PanelClean Boiler Flueways. See Figure IX. ServiceAvoid Breathing Fiber Particulates and Dust Pilot Burner Location Boiler Flueway CleaningHoneywell EI Ignition Module Yellow LED Flame Codes OFF Honeywell EI Ignition Module Green LED Status CodesHoneywell EI Trouble Shooting Guide Repair Parts Heat Exchanger Assembly Canopy Base Assembly Manifold and Main Burners Description Size Quantity Description Quantity Gas Valve, Robertshaw 7000DERHC, Natural Gas, 1 NPT 81660151 Solenoid Gas Valve, Honeywell V8295A1024, ¾ NPT 81660235 Description Quantity Natural Gas Only Pilot Burner, Honeywell Q348A1002, Natural Gas Pilot Burner, Honeywell Q348A1010, LP Gas 8236081 Pipe Tee, 1/8 NPT, Malleable 806601005 Description Size Quantity Brass Compression Coupling, 1/4 OD Tube 8236008 Description Size Quantity Page Jacket Jacket Front Removable Panel Trim and Miscellaneous Controls Draft Hood and Automatic Vent Damper Service Record Service Record Service Record