Gas Piping; Pipe Sizing - Trane GKNE Accompaniment To The Installation, Operation And Maintenance Manual

Figure 3. Heater mounting*
* All hanging hardware and wood is not included with the unit
(To be field supplied).
Figure 4. Heater suspension
Note: Threaded rod is 3/8-inch.

Gas Piping

WARNING
To avoid damage or possible personal injury, do not
connect gas piping to this unit until a supply line
pressure/leak test has been completed. Connecting the
unit before completing the pressure/leak test may
damage the unit gas valve and result in a fire hazard.
WARNING
Do not rely on a shut-off valve to isolate the unit while
conducting gas pressure/leak tests. These valves may
not be completely shut off, exposing the gas valve to
excessive pressure and damage.

Pipe Sizing

To provide adequate gas pressure to the gas unit heater,
size the gas piping as follows:
GKNE-SVX001B-EN
1. Find the cu. feet/hr. by using the following formula:
Cu   feet    hr
2. Refer to Table 3. Match "Length of Pipe in Feet" with
appropriate "Gas Input - Cu. Feet/Hr." figure. This
figure can then be matched to the pipe size at the top
of the column.
Example: It is determined that a 67 foot (20.4m) run of
gas pipe is required to connect a 200 MBTU gas unit
heater to a 1,000 BTU/cu feet (0.29kW) natural gas
supply
 200000BTU    Hr
---------------------------------------------------------------------
 1000BTU    Cu feet 
Using Table 3, a 1-inch pipe is needed.
Note: See General Safety Information section for English/
Metric unit conversion factors.
NOTICE
If more than one unit heater is to be served by the same
piping arrangement, the total cu. ft./hr. input and
length of pipe must be considered.
NOTICE
If the gas unit heater is to be fired with LP gas, consult
your local LP gas dealer for pipe size information.
NOTICE
Heater installation for use with propane (bottled) gas
must be made by a qualified l.p. gas dealer or installer.
He/she will insure that proper joint compounds are
used for making pipe connections; that air is purged
from lines; that a thorough test is made for leaks before
operating the heater; and that it is properly connected
to the propane gas supply system.
Before any connection is made to the existing line
supplying other gas appliances, contact the local gas
company to make sure that the existing line is of adequate
size to handle the combined load.
Installation
 InputBtu    Hr 

= -------------------------------------------------- -
1000

 200Cu feet     hr 
=

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