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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Lennox International Inc GWB9-075IH-2, GWB9-100IH-2, GWB9-050IH-2, Gas-Fired Hot Water Boiler installation instructions VR8205

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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