Lennox International Inc GWB9-050IH-2 Safety Relief Valve, Expansion Tank And Make-Up Water

Page 18

NEAR BOILER PIPING

!WARNING

Burn and scald hazard. Safety relief valve could discharge steam or hot water during operation. Install discharge piping per these instructions.

Safety Relief Valve

Installation of safety relief valve shall conform to ANSI/ ASME Boiler and Pressure Vessel Code, Section IV.

•Install furnished safety relief valve using 3/4” x 4½” pipe provided with boiler. See Figure 8.

•Install safety relief valve with spindle in vertical position.

•Do not install shutoff valve between boiler and safety relief valve.

•Install discharge piping from safety relief valve. See Figure 8.

•Use ¾” or larger pipe.

•Use pipe suitable for temperatures of 375°F (191°C) or greater.

•Individual boiler discharge piping shall be independent of other discharge piping.

•Size and arrange discharge piping to avoid reducing safety relief valve relieving capacity below minimum relief valve capacity stated on rating plate.

•Run pipe as short and straight as possible to location protecting user from scalding and properly drain piping.

•Install union, if used, close to safety relief valve outlet.

•Install elbow(s), if used, close to safety relief valve outlet and downstream of union (if used).

•Terminate pipe with plain end (not threaded).

Expansion Tank And Make-Up Water

Determine required system fill pressure, system design temperature, and system water content.

•Boiler contains 2.6 gallons (U.S.). Size expansion tank accordingly. Consult expansion tank manufacturer for proper sizing information.

•Connect properly sized expansion tank (not furnished). Diaphragm type expansion tank see Figure 9, Page 19. See Figure 10, Page 20 for conventional closed type expansion tanks.

•For diaphragm type expansion tanks, adjust tank air pressure to match system fill pressure. Install furnished air vents shown for diaphragm type expansion tank system only.

•Install make-up water connections as shown per local codes.

•If pressure reducing valve is used, adjust to match system fill pressure.

•Verify clean water supply is available. When water supply is from well or pump, install sand strainer at pump

Figure 8 - Relief Valve Boiler Piping

RELIEF VALVE

DISCHARGE

LINE

Check local

codes for maximum distance from floor or allowable safe point of

discharge.

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Contents Installation Instructions Boiler Dimensions Introduction IntroductionImportant Safety Information GeneralSEA Level Ratings Natural and Propane Gases Net Ahri Rating Shipping Flue DiameterBoilers for USE AT High Altitude United States Installations 90 50/75/100 Series 2 Natural GAS90 50/75 Series 2 Propane GAS 43331093 43331096Before Installing the Boiler Boiler SizingBoiler Location Considerations Combustion Air And Vent Pipe Requirements Boiler InstallationLocating The Boiler Extreme cold climate areas, use ¾ Armaflex or equivalentCondensate Drain Requirements Install boiler on level surfaceBoiler is not to be installed on carpeting Foundation RequirementsClean the System First Near Boiler PipingSupply And Return Lines Single Zone Boiler Piping Multi-Zone Systems Two Zone Boiler Piping With Zone ValvesTwo 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 Filling Condensate Trap With Water Reinstall vent drain lineCondensate Drain Piping Chilled Water PipingExample Combustion AIR and Vent PipeConnections And Termination Elbow @ 3 ft. + 1 elbow @ 3 ft. = 6 equivalent ft. of pipeInstallation Boiler SizeVent AIR Intake Roof Vent / Intake TerminationsLess Than 12 Clearance Concentric Vent Terminations CombustionVent AirCombustion Air and Vent Piping Boiler Connections Feet minimum total equivalent length for all modelsCheck Gas Supply Connecting The Gas PipingGAS Supply Piping Leak Check Gas Piping445,000 Gas Pipe Sizes625,000 365,000Thermostat Installation Electrical WiringElectric Power Supply Connect Circulator Pump WiringWiring Schematic Ladder Wiring Diagram Page Ladder Diagram for Figure Controls and Accessories Draft Inducer Casting Temperature Safety SwitchDrain Valve Circulator PumpStart UP Operating Instructions To Turn Off Gas To ApplianceS9381A Integrated Boiler Control Operation and Adjustments User Parameters Adjusting SettingsDisplay State Code Definitions Sequence of Operation Check OUT Procedure and Adjustment Set Thermostat To Desired Room Temperature Review All InstructionsVR8205 Maintenance and Cleaning Annual Examination And Cleaning Of Boiler Components Igniter wires Gas valve wiresRemove draft inducer and gasket from top of flue connector Troubleshooting Initial Service ChecksError Codes Differential AIR Pressure Switch Check Boiler Differential PressureAluminum Series Clean System First Fill Water and ChemistryEliminate System Leaks General Guidelines When Using Antifreeze Antifreeze Products Installation and CHECK-OUT Certificate Boiler Model Serial # Date Installed Measured BTU/HR inputPage Lennox Industries Inc. Dallas, Texas
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GWB9-050IH-2, GWB9-100IH-2, GWB9-075IH-2, Gas-Fired Hot Water Boiler specifications

Lennox International Inc. is a prominent player in the HVAC industry, renowned for its innovative solutions and high-efficiency products. Among its standout offerings is the GWB8 Gas-Fired Hot Water Boiler, available in various models including GWB8-262E-2, GWB8-245E-2, GWB8-280E-2, and GWB8-299E-2. These units are designed to provide reliable and efficient heating solutions for residential applications.

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