GAS Supply, Ventilation Installation Instructions

GAS SUPPLY

PROPANE/LP GAS MODEL 125-R ONLY

Propane gas and propane tank(s) are to be fur- nished by the user.

Use this heater only with a propane vapor withdrawal supply system. See Chapter 5 of the Standard for Storage and Handling of Liqueﬁed Petroleum Gas, ANSI/NFPA 58 and/or CAN/CGA B149.2. Your local library or ﬁre department will have this booklet.

The amount of propane gas ready for use from propane tanks varies. Two factors decide this amount.

1.The amount of liquid propane gas in tank(s)

2.The temperature of tank(s)

The chart below shows the minimum number of 45 kg (100 lb) tanks needed to run the heater. Connect tanks together with a manifold.

Average Temperature	Number Of Tanks
°C (°F) At Tank Location	45 kg (100 lb)
4° (40°) to 0° (32°)	2
Below 0° (32°)	3

Less gas is vaporized at lower temperatures. Your local propane gas dealer will help you select the proper supply system.

NATURAL GAS MODEL 125-RN ONLY

The user must furnish the natural gas supply and the connections to the heater.

Regulate the natural gas supply down from a mini- mum 7" w.c. to a maximum of 1/2 psi. The natural gas supply capacity should be able to supply a minimum of 125 cubic feet of gas at pressure for each heater connected to the system.

Consult your natural gas supplier for proper sizing of the natural gas supply lines.

Follow all local ordinances and codes. In the ab- sence of local ordinances and codes, refer to the National Fuel Gas Code Handbook, NFPA54/ANSI Z223.1 and the Natural Gas Installation Code, CAN/ CGA B149.1.

VENTILATION

WARNING: Provide at least a .35 m2 (3.75 ft2) opening of fresh, outside air while running heater. If proper fresh, outside air ventilation is not provided, carbon monoxide poisoning can occur. Provide proper fresh, outside air ventilation before running heater.

INSTALLATION

INSTRUCTIONS

Read these instructions care- fully. Read and adhere to these instructions. Do not allow any- one who has not read these instructions to assemble, light, adjust or operate this heater.

Do not attempt to operate the heater with any gas other than that indicated on the heater nameplate.

For the U.S. and/or Canada, the installation of this appliance must comply with local and/or Provin- cial codes or, in the absence of these codes, with the (U.S.) National Fuel Gas Code, ANSI Z223.1

–Latest Edition (for natural and propane/LP gas operation) and with the (U.S) Standard for the Storage and Handling of Liqueﬁed Petroleum Gases, ANSI/NFPA 58 (for propane/LP gas opera- tion) or with the current (Canadian) CAN/CGA B149.1 and B149.2 installation codes.

This heater (including hose and regulator assembly if applicable) must be inspected before each use and at least annually by a qualiﬁed service person. If the hose for model 125-R shows evidence of excessive abrasion or wear or if the hose is cut, it must be replaced prior to the heater being put into operation. The replacement hose assembly shall be that speciﬁed by the manufacturer.

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114248-01A

125-R specifications

Desa 125-R is a cutting-edge development in the world of technology, designed to meet the diverse needs of users in today's fast-paced environment. This innovative device combines advanced features, superior performance, and user-friendly technologies that set it apart from its competitors.

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