Trane Gas Unit Heaters Installation Manual download pdf (Page 16)

16 GKND-SVX01B-EN

Installation: Piping

Gas Supply Piping

Pipe Sizing

To provide adequate gas pressure at the gas unit heater,

size the gas piping as follows:

1. Find the ft

/hr by using the following formula:

2. Refer to Tabl e 3, p. 17. Match “Length of Pipe” with

appropriate “Gas Input - Ft

/Hr” value. This value can

then be matched to the pipe size at the left of the table.

Example: It is determined that a 67 foot (20.4 m) run of

gas pipe is required to connect a 200 MBtu gas unit

heater to a 1,000 Btu/ft

(0.29 kW) natural gas supply.

Using Table 3, p. 17, a 1-inch pipe is needed.

Notes:

• See “General Safety Information,” p. 7 for English/SI

(metric) unit conversion factors.

• If more than one gas unit heater is to be served by the

same piping arrangement, the total cubic feet per hour

input and length of pipe must be considered.

• If the gas unit heater is to be fired with LP gas, consult

the local LP gas dealer for pipe size information.

Before any connection is made to an existing line

supplying other gas appliances, contact the local gas

company to make certain that the existing line is of

adequate size to handle the combined load.

WARNING

Flammable Vapors!

When connecting to existing gas lines be sure to valve

off the gas supply ahead of connection point. To avoid

explosion or possible fire, always purge all residual gas

from piping before cutting into existing line or

removing threaded fittings. Failure to remove all gas

vapors could result in death or serious injury or

equipment or property-only damage.

/hr =

Input

Btu per ft

200,000 Btu/hr

= 200 ft

/hr

1,000 Btu/ft

WARNING

Hazard of Explosion and Fire!

Heater installation for use with propane (LP gas) must

be made by a qualified LP Gas Dealer or LP Gas Installer

to ensure that all appropriate codes, installation

procedures, and precautions have been followed.

Failure to follow these instructions could result in death

or serious injury.

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Trane Gas Unit Heaters Installation Manual Page 16

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