Goodman Mfg GMS8, GDS8 White-Rodgers Model 36G22, Measuring Inlet Gas Pressure Alternate Method

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GAS SUPPLY PRESSURE MEASUREMENT

CAUTION

TO PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE, THE INLET GAS SUPPLY PRESSURE MUST BE AS SPECIFIED ON THE UNIT RATING PLATE WITH ALL OTHER HOUSEHOLD GAS FIRED APPLIANCES OPERATING.

WHITE-RODGERS 36F22 GAS VALVE

The line pressure supplied to the gas valve must be within the range specified below. The supply pressure can be measured at the gas valve inlet pressure tap or at a hose fitting installed in the gas piping drip leg. The supply pressure must be measured with the burners operating (see picture above). To measure the gas supply pressure, use the following procedure.

With Power and Gas Off:

1.Connect a water manometer or adequate gauge to the “inlet pressure tap” of the gas valve.

As an alternative method, inlet gas pressure can also be measured by removing the cap from the drip leg and installing a predrilled cap with a hose fitting.

With Power and Gas On:

2.Put furnace into heating cycle and turn on all other gas consuming appliances.

If operating pressures differ from the Inlet Gas Supply Pressure table below, make necessary pressure regulator adjustments, check piping size, etc., and/or consult with local utility.

Gas Line

Gas

Shutoff

Valve

Gas Line

To Furnace

Open To

Atmosphere

Drip Leg Cap

With Fitting

Manometer Hose

Manometer

Measuring Inlet Gas Pressure (Alternate Method)

3.Turn ON the gas supply and operate the furnace and all other gas consuming appliances on the same gas supply line.

4.Measure furnace gas supply pressure with burners firing. Supply pressure must be within the range specified in the table.

Inlet Gas Supply Pressure

Natural Gas

Minimum: 5.0" w.c.

Maximum:10.0" w.c.

Propane Gas

Minimum: 11.0" w.c.

Maximum:13.0" w.c.

If supply pressure differs from table, make the necessary adjustments to pressure regulator, gas piping size, etc., and/or consult with local gas utility.

5.Turn OFF gas to furnace at the manual shutoff valve and disconnect manometer. Reinstall plug before turning on gas to furnace.

6.Turn OFF any unnecessary gas appliances started in step 3.

WHITE-RODGERS 36G22 GAS VALVE

The line pressure supplied to the gas valve must be within the range specified below. The supply pressure can be measured at the gas valve inlet pressure tap or at a hose fitting installed in the gas piping drip leg. The supply pressure must be measured with the unit OFF. To measure inlet pressure, use the following procedure.

Gas Valve

On/Off

Selector

SwitchInlet Pressure

Tap

OUTLET

INLET

Pressure Regulator

Outlet Pressure

Adjustment

Tap

(Under Cap Screw)

 

White-Rodgers Model 36G22

1.Turn OFF gas to furnace at the manual gas shutoff valve external to the furnace.

2.Using 3/32 hex wrench, loosen inlet pressure tap screw one turn.

3.Connect a 5/16 inch hose and calibrated water manometer to the gas valve inlet pressure tap. The hose should overlap the tap by 3/8 inch.

4.Turn ON the gas supply and operate the furnace

5.Leak test. Using a leak detection solution or non-chlorine soap suds, check for leaks at hose connection. Bubbles forming indicate a leak. SHUT OFF GAS AND FIX ALL LEAKS IMMEDIATELY BEFORE PROCEEDING TO NEXT STEP!

6.Measure furnace gas supply pressure. Supply pressure must be within the range specified in the Inlet Gas Supply Pressure table.

If supply pressure reading differs from the table, make necessary adjustments to pressure regulator, gas piping size, etc., and/or consult with local gas utility.

Inlet Gas Supply Pressure

Natural Gas

Minimum: 5.0" w.c.

Maximum:10.0" w.c.

Propane Gas

Minimum: 11.0" w.c.

Maximum:13.0" w.c.

7.Turn OFF gas to furnace at the manual shutoff valve and disconnect manometer and hose. Reinstall plug before turning on gas to furnace.

8.Seal pressure port. Tighten inlet pressure tap screw clockwise 7 in-lbs. minimum.

9.Retest for leaks. If bubbles form, shut down gas and fix leaks immediately.

10.Turn valve switch ON.

IO-242C

23

05/05

 

 

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Contents Installation & Operating Table of Contents XVI. Maintenance XII. Start-up Procedure and AdjustmentXIV. Safety Circuit Description XV. TroubleshootingTo the Owner II. SafetyTo the Installer Homeowner NoticeCSA International III. Product ApplicationAmerican National Standards Institute National Fire Protection AssociationGeneral IV. Location Requirements and ConsiderationsNational Fire Protection Association, Inc Existing Furnace Removal Clearances and AccessibilityHorizontal Installation Suspended FurnaceEquipment Located in Unconfined Spaces Z223.1 Section GeneralThermostat Influences Equipment Located in Confined Spaces Space, UnconfinedModel Minimum Vent Specially Engineered InstallationsVI. Category I Venting Vertical Venting Louvers and GrillesTypical Multiple Flue Clay Tile Chimney Checklist SummaryVII. Exterior Masonry Chimneys Category I Furnaces only Upflow Rotated Induced Draft BlowerCheck 1 Proper Chimney Termination Termination 10 Feet Or Less From Ridge, Wall or ParapetTermination More Than 10 Feet From Ridge, Wall or Parapet Check 5 Liner Condition Check 4 Debris in CleanoutCheck 7 Complete the Installation Check 3 Chimney Crown ConditionFIX 4 Relining VIII. Electrical ConnectionsFIX 2 -CHANGE Venting Arrangements FIX 3 Rebuild the CrownFossil Fuiel Applications Wiring HarnessIntegrated Ignition Control Volt Line ConnectionsHeating Heating/Cooling Room Thermostat Typical Field Wiring 24 VAC Control CircuitVolt Thermostat Wiring Setting the Heat AnticipatorHigh Altitude Derate IX. GAS Supply and PipingTwinning Propane GAS Conversion Pressure Switch Changes Furnace input Kbtu/hr904BNA does not require a switch change Firing RateGAS Piping Connections General Upflow InstallationsGeneral Furnace Layout GAS Piping Checks Propane Gas Installation TypCounterflow Installations Propane GAS Piping ChartsDuctwork Air Circulating AIR and FiltersXI. Sequence of Operation Integrated Ignition Control White-Rodgers Model 36G22 XII. START-UP Procedure and AdjustmentWhite-Rodgers Model 36F22 WHITE-RODGERS 36F22 GAS Valve White-Rodgers Model 36G22Measuring Inlet Gas Pressure Alternate Method GAS Supply Pressure MeasurementGAS Input Rate Measurement Natural GAS only GAS Manifold Pressure Measurement and AdjustmentXIII. Operational Checks Temperature Rise MeasurementAdjustment Switches Burner Flame XIV. Safety Circuit DescriptionXV. Troubleshooting XVI. Maintenance Induced Draft and Circulator Blower Motors Flame Sensor Qualified Servicer onlyIgniter Qualified Servicer only Upright Filter RemovalTroubleshooting Chart Continuously Wiring Diagram for GMS8/GDS8/GHS8 Are Subject to Change Without Notice
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GMS8, GHS8, GDS8 specifications

Goodman Manufacturing, a well-reputed name in the HVAC industry, offers a comprehensive range of heating and cooling solutions. Among their notable products are the GDS8, GHS8, and GMS8 series, each designed to meet diverse customer needs while providing exceptional performance and energy efficiency.

The Goodman GDS8 gas furnace is known for its remarkable efficiency and reliability. Boasting an AFUE (Annual Fuel Utilization Efficiency) rating of up to 80%, the GDS8 converts a significant portion of fuel into usable heat, ensuring lower energy bills for homeowners. This model features a multi-speed blower motor that optimizes airflow, enhancing temperature consistency throughout the home, and reducing noise levels during operation. The GDS8 comes equipped with a durable heat exchanger crafted from high-quality steel, ensuring longevity and optimal heat transfer.

On the other hand, the GHS8 series represents Goodman’s commitment to high-efficiency heating. With an AFUE rating of up to 96%, the GHS8 is engineered for maximum performance. Its two-stage heating system allows for better temperature control, enabling the furnace to operate quietly and efficiently. Another standout feature is the ComfortBridge technology, which enhances the system’s ability to communicate and adapt to the home’s specific heating needs. This feature optimizes energy usage and increases comfort levels in any environment.

The Goodman GMS8 model is an exceptional choice for homeowners looking for a reliable gas furnace with a focus on energy efficiency. Similar to its counterparts, the GMS8 also delivers an AFUE of up to 96.5%. This unit features an advanced modulating gas valve that adjusts heating output based on the temperature requirements, creating a consistent and comfortable indoor climate. The GMS8 is also equipped with a high-efficiency ECM blower motor, which reduces energy consumption while improving airflow.

All three models feature Goodman’s quality construction, including a heavy-gauge cabinet that minimizes noise and enhances durability. They also are backed by Goodman’s limited lifetime warranty on the heat exchanger and a 10-year limited warranty on parts, providing customers with peace of mind regarding their investment. These furnaces are designed with efficiency and comfort in mind, making the GDS8, GHS8, and GMS8 ideal choices for homeowners looking to enhance their indoor environment while keeping energy costs in check.
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