Propane GAS Installations

WARNING

TO AVOID PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO FIRE OR EXPLOSION CAUSED BY A PROPANE GAS LEAK, INSTALL A GAS DETECTING WARNING DEVICE. SINCE RUST CAN REDUCE THE LEVEL OF ODORANT IN PROPANE GAS, A GAS DETECTING WARNING DEVICE IS THE ONLY RELIABLE WAY TO DETECT A PROPANE GAS LEAK. CONTACT A LOCAL PROPANE GAS SUPPLIER ABOUT INSTALLING A GAS DETECTING WARNING DEVICE.

IMPORTANT NOTE: Propane gas conversion kits must be installed to convert units to propane gas.

All propane gas equipment must conform to the safety standards of the National Board of Fire Underwriters (See NBFU Manual 58). Line pressure 11.3 - 14” w.c.

For satisfactory operation, propane gas manifold pressure must be within 9.7 - 10.3 inches w.c. for high fire and within

6.7- 7.3 inches w.c. low fire at the manifold with all gas appli- ances 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.)
	Regulator	Continuous
		11" W.C.
	200 PSIG	Second Stage
	Maximum	Regulator

TYPICAL PROPANE GAS PIPING

ROOF TOP LOCATION AND INSTALLATION

The gas supply piping location and installation for roof top units must be in accordance with local codes or, in the ab- sence of locals codes, with ordinances of the latest edition of the National Fuel Gas Code (ANSI Z223.1).

A manual gas shutoff valve must be field installed external to the roof top unit. In addition, a drip leg must be installed near the inlet connection. A ground joint union connection is re- quired between the external shutoff valve and the unit con- nection to the gas valve to permit removal of the burner as- sembly for servicing.

1.Route gas piping to unit so that it does not interfere with the removal of access panels. Support and align piping to prevent strains or misalignment of the manifold assembly.

2.All units are furnished with standard female NPT pipe connections. Connection pipe sizes for CPG090 through 300 units is 3/4" NPT The size of the gas supply piping to the unit must be based on length of run, number of units on the system, gas characteristics, BTU requirement and available supply pressure. All piping must be done in accordance with local codes or, in the absence of local codes, with the latest edition of the National Fuel Gas Code (ANSI Z223.1).

NOTE: The gas connection size at the unit does NOT establish the size of the supply line.

3.These units are designed for either natural or propane (LP) gas and are specifically constructed at the factory for only one of these fuels. The fuels are NOT interchangeable. However, the furnace can be converted in the field from natural gas to LP gas with the appropriate factory kit (see unit Technical Manual for the appropriate kit). Only a qualified contractor, experienced with natural and propane gas systems, should attempt conversion. Kit instructions must be followed closely to assure safe and reliable unit operation.

4.With all units on a common line operating under full fire, natural gas main supply pressure should be adjusted to approximately 7.0" w.c., measured at the unit gas valve. If the gas pressure at the unit is greater than 10.5" w.c., the contractor must furnish and install an external type positive shutoff service pressure regulator. The unit will not function satisfactorily if supply gas pressure is less than 5.5" w.c. or greater than 10.5" w.c..

NOTE: A minimum horizontal distance of 48" between the regulator and the furnace flue discharge is required.

5.With all units on a common line operating under full LP gas main supply pressure should be at least 11.0" w.c. and must be no greater than 14.0" w.c., measured at the unit gas valve. Unit will not function satisfactorily if supply gas pressure is less than 11.0" w.c. or greater than 14.0" w.c..

CPG SERIES specifications

Goodman Manufacturing has long been a trusted name in the HVAC industry, known for delivering reliable and efficient heating and cooling solutions. Among its impressive lineup is the CPG series, a collection of packaged units that cater to a wide range of residential and commercial applications. The CPG series is designed with the latest technologies and features, making it an ideal choice for those seeking comfort and performance.

One of the most significant characteristics of the CPG series is its energy efficiency. Engineered to meet rigorous energy standards, these units utilize advanced refrigerant technologies that not only lower energy consumption but also contribute to reducing environmental impact. The high-efficiency scroll compressor within the CPG series is designed to operate quietly and smoothly, ensuring that homeowners enjoy a comfortable indoor environment without disruptive noise.

The CPG series also stands out with its robust construction. Each unit is crafted from durable materials that can withstand various weather conditions, ensuring longevity and reliability. The all-aluminum evaporator coil enhances corrosion resistance, prolonging the unit's lifespan and maintaining optimal performance throughout its operation.

In terms of features, the CPG series offers an integrated microprocessor control system that optimizes performance based on real-time environmental data. This smart technology allows for accurate temperature control and improved efficiency by adapting to changing conditions. Furthermore, the series provides multiple capacity options, making it flexible for various building sizes and requirements.

Ease of installation and maintenance is another hallmark of the CPG series. These packaged units are designed for quick setup, reducing labor costs and installation time. Additionally, the access panels on the units are strategically placed, facilitating easier maintenance and servicing. This advantage not only enhances user convenience but also ensures that the units operate efficiently for years to come.

Moreover, the CPG series supports various accessories and enhancements, such as advanced filtration systems and programmable thermostats, allowing users to customize their HVAC system based on specific needs and preferences.

In conclusion, the Goodman CPG series embodies a perfect blend of efficiency, durability, and technology. With its focus on energy savings and user-friendly design, it represents a sound investment for those seeking superior HVAC solutions for their homes or commercial spaces. Whether it's for new construction or an upgrade to an existing system, the CPG series offers performance and reliability that customers can depend on.