Manuals / Lennox International Inc / Household Appliance / Boiler

Lennox International Inc GWB9-100IH-2, GWB9-075IH-2, GWB9-050IH-2, Gas-Fired Hot Water Boiler

Models: GWB9-050IH-2 GWB9-100IH-2 GWB9-075IH-2 Gas-Fired Hot Water Boiler

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Figure 22 - Suggested Wiring Schematic for Domestic Hot Water Priority Two Zone System with Circulators Using Argo AR822II Pump Relay

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Lennox International Inc GWB9-100IH-2, GWB9-075IH-2, GWB9-050IH-2, Gas-Fired Hot Water Boiler installation instructions

Contents

Installation Instructions Boiler Dimensions Introduction IntroductionGeneral Important Safety InformationNet Ahri Rating Shipping Flue Diameter SEA Level Ratings Natural and Propane Gases90 50/75/100 Series 2 Natural GAS Boilers for USE AT High Altitude United States Installations43331093 43331096 90 50/75 Series 2 Propane GASBefore Installing the Boiler Boiler SizingBoiler Location Considerations Locating The Boiler Boiler InstallationCombustion Air And Vent Pipe Requirements Extreme cold climate areas, use ¾ Armaﬂex or equivalentBoiler is not to be installed on carpeting Install boiler on level surfaceCondensate Drain Requirements Foundation RequirementsClean the System First Near Boiler PipingSupply And Return Lines Single Zone Boiler Piping Two Zone Boiler Piping With Zone Valves Multi-Zone SystemsTwo Zone Boiler Piping With Circulators Page Page Page Safety Relief Valve Expansion Tank And Make-Up WaterTerminate pipe with plain end not threaded Diaphragm Type Expansion Tank Piping Conventional Closed Type Expansion Tank Piping Condensate Drain Piping Reinstall vent drain lineFilling Condensate Trap With Water Chilled Water PipingConnections And Termination Combustion AIR and Vent PipeExample Elbow @ 3 ft. + 1 elbow @ 3 ft. = 6 equivalent ft. of pipeBoiler Size InstallationRoof Vent / Intake Terminations Vent AIR IntakeLess Than 12 Clearance CombustionVent Air Concentric Vent TerminationsFeet minimum total equivalent length for all models Combustion Air and Vent Piping Boiler ConnectionsGAS Supply Piping Connecting The Gas PipingCheck Gas Supply Leak Check Gas Piping625,000 Gas Pipe Sizes445,000 365,000Electric Power Supply Electrical WiringThermostat Installation Connect Circulator Pump WiringWiring Schematic Ladder Wiring Diagram Page Ladder Diagram for Figure Controls and Accessories Drain Valve Casting Temperature Safety SwitchDraft Inducer Circulator PumpStart UP To Turn Off Gas To Appliance Operating InstructionsS9381A Integrated Boiler Control Operation and Adjustments User Parameters Adjusting SettingsDisplay State Code Deﬁnitions Sequence of Operation Check OUT Procedure and Adjustment Review All Instructions Set Thermostat To Desired Room TemperatureVR8205 Maintenance and Cleaning Annual Examination And Cleaning Of Boiler Components Igniter wires Gas valve wiresRemove draft inducer and gasket from top of ﬂue connector Initial Service Checks TroubleshootingError Codes Boiler Differential Pressure Differential AIR Pressure Switch CheckAluminum Series Clean System First Fill Water and ChemistryEliminate System Leaks General Guidelines When Using Antifreeze Antifreeze Products Boiler Model Serial # Date Installed Measured BTU/HR input Installation and CHECK-OUT CertificatePage Lennox Industries Inc. Dallas, Texas