Proper Piping Practice

8.The unit must be connected to the building piping by one of the following methods:

•Rigid metallic pipe and fittings

•Semirigid metallic tubing and metallic fittings (Aluminum alloy tubing must not be used in exterior locations)

•Listed gas appliance connectors used in accordance with the terms of their listing that are completely in the same room as the equipment

•In the prior two methods above the connector or tubing must be protected from physical and thermal damage. Aluminum alloy tubing and connectors must be coated to protect against external corrosion when in contact with masonry, plaster or insulation or are subject to repeated wettings by liquids (water - not rain water, detergents or sewage)

There will be air in the gas supply line after testing for leaks on a new installation. Therefore, the air must be bled from the line by loosening the ground joint union until pure gas is expelled. Tighten union and wait for five minutes until all gas has been dissipated in the air. Be certain there is no open flame in the vicinity during air bleeding procedure. The unit is placed in operation by closing the main electrical disconnect switch for the unit.

PROPANE GAS INSTALLATIONS

MANUAL

SHUT-OFF

VALVE

DRIP LEG

GROUND JOINT UNION

(INSTALLED AHEAD OF GAS VALVE)

GROMMET

NOTE: The unit gas supply entrance is factory sealed with plugs. Keep plugs in place until gas supply is ready to be installed. Once ready, replace the plugs with the supplied grommets and install gas supply line.

GAS PIPING CHECKS

IMPORTANT NOTE: Propane gas conversion kits must be installed to convert units to propane gas. Refer to the gas piping section for the correct LP kit for conversion.

All propane gas equipment must conform to the safety standards of the National Board of Fire Underwriters (See NBFU Manual 58).

For satisfactory operation, propane gas supply pressure must be within 9.7 - 10.3 inches W.C. at the manifold with all gas appliances in operation. Maintaining proper gas pressure depends on three main factors:

1.Vaporization rate, which depends on (a) temperature of the liquid, and (b) wetted surface area of the container or containers.

2.Proper pressure regulation.

3.Pressure drop in lines between regulators, and between second stage regulator and the appliance. Pipe size required will depend on length of pipe run and total load of all appliances.

TANKS AND PIPING

Complete information regarding tank sizing for vaporization, recommended regulator settings and pipe sizing is available from most regulator manufacturers and propane gas suppliers.

Since propane gas will quickly dissolve white lead or most standard commercial compounds, special pipe dope must be used. Shellac base compounds resistant to the actions of liquefied petroleum gases such as Gasolac®, Stalactic®, Clyde’s® or John Crane® are satisfactory.

See below for typical propane gas piping.

First Stage	5 to 15 PSIG
First Stage	(20 PSIG Max.)
Regulator	(20 PSIG Max.)	Continuous
Regulator		Continuous
		11" W.C.
200 PSIG		Second Stage
Maximum		Regulator

Typical Propane Gas Piping

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.