NORMAL HEATING SEQUENCE

1.Thermostat calls for heat .

2.The induced draft blower is energized.

3.The igniter is energized and is allowed to preheat.

4.The gas valve is energized delivering gas to the burners and starting combustion.

5.The control checks for a signal from the flame sensor within seven seconds after the gas valve is energized. Gas will only continue to flow if a signal is present.

6.Circulator blower is energized on heat speed following a fixed thirty second blower on delay . Electronic air cleaner terminals are energized with circulator blower.

7.Thermostat contacts open when thermostat is satisfied, completing the call for heat.

8.. Gas valve closes, extinguishing flame.

9.Induced draft blower is de-energized following a two (2) - second post purge. Humidifier terminals are de-energized.

10.Circulator blower is de-energized following a selectable heat off delay period (90, 120, 150 or 180 seconds). Electronic air cleaner terminals are de-energized.

The adjustable delay-off timing allows the installer to customize the comfort level.

CONSTANT FAN

The continuous fan speed mode provides circulation.

XII. START-UP PROCEDURE AND ADJUSTMENT

Furnace must have a 115 VAC power supply properly connected and grounded. Proper polarity must be maintained for correct operation. An interlock switch prevents furnace operation if the blower door is not in place. Keep the blower access door in place except for inspection and maintenance.

This furnace is also equipped with a self-diagnosing electronic control module. In the event a furnace component is not operating properly, the control module LED will flash on and off in a factory- programmed sequence, depending on the problem encountered. This light can be viewed through the observation window in the blower access door. Refer to the Troubleshooting Chart for further explanation of the lighting codes.

Follow the start-up and adjustment items, refer to further information in Section XIII, Operational Checks.

FURNACE OPERATION

Purge gas lines of air prior to start-up. Do not purge lines into an enclosed burner compartment.

Check for leaks using an approved chloride-free soap and water solution, an electronic combustible gas detector, or other approved method. Verify that all required kits (propane gas, high altitude, etc.) have been appropriately installed.

NOTE: An interlock switch prevents furnace operation if the blower door is not in place. Keep the blower access doors in place except for inspection and maintenance.

FURNACE START-UP

1.Close the manual gas shutoff valve external to the furnace.

2.Turn off the electrical power to the furnace.

3.Set the room thermostat to the lowest possible setting.

4.Remove the burner compartment door.

NOTE: This furnace is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.

5.White-Rodgers Models 36F22/36G22: Push the switch to the OFF position.

6.Wait five minutes to clear out any gas. Then smell for gas, including near the floor.

7.If gas can be smelled following the five minute waiting period in Step 6, immediately follow the instructions on Page 4 of this manual. If you do not smell gas after five minutes:

White-Rodgers Models 36F22/36G22: Push the switch to the ON position.

8.Replace the door on the front of the furnace.

9.Open the manual gas valve external to the furnace.

10.Turn on the electrical power supply to the furnace.

11.Set the room thermostat to the desired temperature.

NOTE: There is an approximate 20 second delay between thermostat energizing and burner firing.

FURNACE SHUTDOWN

1.Set the thermostat to lowest setting.

2.Turn off the electrical power supply to the furnace.

3.White-Rodgers Models 36F22/36G22: Push switch to the OFF position.

4.Close manual gas shutoff valve external to the furnace.

5.Replace the door on the unit.

Gas Valve

On/Off

Selector

Switch

INLET

 

 

OUTLET

Inlet Pressure Tap

Pressure Regulator

Outlet (Manifold)

(Side of Valve)

 

Adjustment

 

Pressure Tap

 

(Under Cap Screw)

 

White-Rodgers Model 36F22

Outlet Pressure

Pressure Regulator

 

Adjustment

Tap

 

 

 

(Under Cap Screw)

 

 

INLET

 

 

OUTLET

Inlet Pressure

Gas Valve

Tap

On/Off

 

 

Selector

 

Switch

White-Rodgers Model 36G22

IO-242C

22

05/05

Page 22
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Goodman Mfg GHS8, GDS8, GMS8 XII. START-UP Procedure and Adjustment, White-Rodgers Model 36F22, White-Rodgers Model 36G22

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.