Burnham 8H manual

Page 27

2.If boiler is connected to heating coils located in air handling units where they may be exposed to refrigerated air, boiler piping must be equipped with flow control valves to prevent gravity circulation of boiler water during cooling system operation.

3.The piping diagrams shown (Figure 23, Detail “A” and Detail “B”) are recommended for optimum operation and long term reliability.

Burnham Commercial recommends maintaining temperature differential (drop) across the system

at 40°F or less, and return water temperature at minimum of 135°F.

Continued boiler operation for prolonged periods of time under conditions when temperature differential across the system exceeds 40°F and/or return water temperature stays below 135°F, may result in premature boiler failure due to flue gas condensation and/or thermal shock.

Pump flow rates and minimum boiler supply and return pipe sizes are shown in Table 4.

Figure 23: Recommended Boiler Piping for Circulator Zoned Heating Systems

Detail “A”: Blend Pump Piping

Detail “B”: Primary/Secondary Piping

 

 

with By-Pass

27

 

 

Image 27
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 Gas Piping Rated InputConnect boiler gas valve to gas supply system 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 Adjust gas input rate to boiler. Natural Gas Check LimitsInput Rate 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