Secondary Limit Control Pre-Operation Checks

If the power to the unit is interrupted during the heating cycle, it may cause the secondary limit to trip. Once the blower compartment temperature drops below the limit reset temperature, the limit will automatically reset.

Secondary

Control Limit

Back of Unit

Secondary Limit Control

Pre-Operation Checks

1.Close the manual gas valve external to the unit.

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

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

4.Remove the heat exchanger door on the side of the unit by removing screws.

5.This unit is equipped with an ignition device which automatically lights the main burner. DO NOT try to light burner by any other method.

6.Move the gas control valve switch to the OFF position. Do not force.

7.Wait five minutes to clear out any gas.

8.Smell for gas, including near the ground. This is important because some types of gas are heavier than air. If you have waited five minutes and you do smell gas, immediately follow the warnings on page 4 of this manual. If having waited for five minutes and no gas smell is noted, move the gas control valve switch to the ON position.

9.Replace the heat exchanger door on the side of the unit.

10. Open the manual gas valve external to the unit. 11. Turn on the electrical power supply to the unit. 12. Set the thermostat to desired setting.

	Open to	Manometer
	Atmosphere
		Hose

Outlet	High Fire Regulator	Regulator
Outlet	Adjust	Regulator
Pressure Boss		Vent

Gas Supply And Manifold Check

Gas supply pressure and manifold pressure with the burners operating must be as specified on the rating plate.

Gas Inlet Pressure Check

Gas inlet pressure must be checked and adjusted in accordance to the type of fuel being consumed.

With Power And Gas Off:

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

Inlet gas pressure can also be measured by removing the cap from the dripleg and installing a predrilled cap with a hose fitting.

With Power And Gas On:

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

	INLET GAS PRESSURE

Natural		Min. 5.0" W.C., Max. 10.0" W.C.

Propane		Min. 11.0" W.C., Max. 13.0" W.C.

NOTE: Inlet Gas Pressure Must Not Exceed the Maximum Value Shown.

If operating pressures differ from above, 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

Manifold Pressure Check

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

Inlet Pressure Boss

Low Fire

Regulator Adjust

2.	Turn off all electrical power to the system.
3.	Back outlet pressure test screw (inlet/outlet pressure boss)
	out one turn (counterclockwise, not more than one turn).
4.	Attach a hose and manometer to the outlet pressure boss
	of the valve.
5.	Turn ON the gas supply.
6.	Turn on power and energize main (M) solenoid. Do not
	energize the HI solenoid.

		High Fire		Coaxial Coil
Manometer	Coil Terminal (HI)			Coaxial Coil
Manometer	Coil Terminal (HI)			Terminal (M)
	On/Off Switch			Terminal (M)
	On/Off Switch		Common
			Terminal (C)

White-Rodgers Model 36G54 connected to Manometer

7. Measure gas manifold pressure with burners firing. Adjust

manifold pressure using the Manifold Gas Pressure table

shown below.

PG 15 specifications

Goodman Manufacturing's PG 15 series stands out in the competitive HVAC market as a high-efficiency, cost-effective option for both residential and light commercial applications. This product line is particularly valued for its reliable performance and innovative technologies, which focus on energy efficiency, durability, and user comfort.

One of the main features of the PG 15 is its SEER (Seasonal Energy Efficiency Ratio) rating, which reflects its ability to provide superior cooling while using less energy. The higher the SEER rating, the more efficiently the unit operates, leading to significant savings on energy bills. The PG 15 boasts an impressive SEER rating, making it an ideal choice for conscientious consumers looking to lower their utility costs.

Incorporating advanced technologies, the PG 15 features a high-efficiency scroll compressor. This design minimizes vibration and noise, providing a quieter operation that enhances overall comfort in the living or working environment. Additionally, the compressor is designed for longevity, reducing maintenance needs and enhancing the unit's lifespan.

Another notable characteristic of the PG 15 is its durable construction. The unit is built with a galvanized steel cabinet that is protected with a rust-resistant finish, ensuring it withstands the rigors of harsh weather conditions. The 15-inch fan motor and multi-speed blower also contribute to efficient airflow and improved indoor air quality, while the refrigerant management system aids in efficient cooling performance.

Installation versatility is another advantage of the PG 15 series. Designed to accommodate a range of installation setups, this system can easily integrate into existing frameworks, making it suitable for both new constructions and retrofits.

Furthermore, Goodman Mfg places emphasis on customer satisfaction and support. The PG 15 series comes with a comprehensive warranty, offering peace of mind to homeowners and business owners alike. This commitment to quality and customer service has helped Goodman establish a reputation for reliability and performance in the HVAC industry.

In summary, the Goodman PG 15 stands out due to its energy-efficient design, advanced technologies, durable construction, and versatile installation options, making it a compelling choice for anyone seeking an effective and reliable HVAC solution.

Goodman Mfg PG 15 Secondary Limit Control Pre-Operation Checks, Gas Supply And Manifold Check

Models: PG 15