Lennox International Inc GWB9-075IH-2, GWB9-100IH-2, GWB9-050IH-2 installation instructions VR8205

Page 44

CHECK OUT PROCEDURE AND ADJUSTMENT

Figure 27 - Manifold Pressure Measurement Detail

Following steps and diagram indicate location of the connection points required to measure manifold pressure.

Manifold pressure may be measured using a U-Tube Manometer or Differential Pressure Gauge. Diagram shows connection of both measuring devices. Only ONE DEVICE IS REQUIRED to measure manifold pressure.

Remove plug. Install appropriate barbed fitting and connect pressure side line from U-Tube Manometer or Differential Pressure Gauge.

Refer to “Differential Air Pressure Switch Check” on page 49 when reading manifold pressure.

When measurement is complete, disconnect U-Tube Manometer or Differential Pressure Gauge. Be sure to reinstall ⅛” plug, using appropriate pipe thread sealant approved for use with natural and liquefied Petroleum gases.

Figure 28 - Gas Valve

PRESSURE REGULATOR

ADJUSTMENT (UNDER CAP SCREW)

VR8205

INLET

PRESSURE

TAP

INLET

ON

WIRING TERMINALS (2)

OUTLET

PRESSURE

TAP

OUTLET

NOTICE

Regulator cover screw must be installed at all times un- less adjusting manifold pressure. Firing rate and manifold pressure must only be measured with cover screw firmly installed.

OFF

GAS CONTROL KNOB

44

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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 43331096Boiler Location Considerations Before Installing the BoilerBoiler Sizing Boiler Installation Locating The BoilerCombustion Air And Vent Pipe Requirements Extreme cold climate areas, use ¾ Armaflex or equivalentInstall boiler on level surface Boiler is not to be installed on carpetingCondensate Drain Requirements Foundation RequirementsSupply And Return Lines Clean the System FirstNear Boiler Piping Single Zone Boiler Piping Multi-Zone Systems Two Zone Boiler Piping With Zone ValvesTwo Zone Boiler Piping With Circulators Page Page Page Terminate pipe with plain end not threaded Safety Relief ValveExpansion Tank And Make-Up Water Diaphragm Type Expansion Tank Piping Conventional Closed Type Expansion Tank Piping Reinstall vent drain line Condensate Drain PipingFilling Condensate Trap With Water Chilled Water PipingCombustion AIR and Vent Pipe Connections And TerminationExample 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 modelsConnecting The Gas Piping GAS Supply PipingCheck Gas Supply Leak Check Gas PipingGas Pipe Sizes 625,000445,000 365,000Electrical Wiring Electric Power SupplyThermostat Installation Connect Circulator Pump WiringWiring Schematic Ladder Wiring Diagram Page Ladder Diagram for Figure Controls and Accessories Casting Temperature Safety Switch Drain ValveDraft Inducer Circulator PumpStart UP Operating Instructions To Turn Off Gas To ApplianceDisplay S9381A Integrated Boiler Control Operation and AdjustmentsUser Parameters Adjusting Settings State Code Definitions Sequence of Operation Check OUT Procedure and Adjustment Set Thermostat To Desired Room Temperature Review All InstructionsVR8205 Maintenance and Cleaning Remove draft inducer and gasket from top of flue connector Annual Examination And Cleaning Of Boiler ComponentsIgniter wires Gas valve wires Troubleshooting Initial Service ChecksError Codes Differential AIR Pressure Switch Check Boiler Differential PressureAluminum Series Eliminate System Leaks Clean System FirstFill Water and Chemistry 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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