38
G. GAS
G.2. Procedure: Connecting Gas
Lines to Gas Valve
1. Place backup wrench on valve, shown below
in
Figure G.2. - A.
2. Connect the gas line to the gas valve
supplied with unit. Routing can be through the
gas pipe opening shown in
Figure G.2.1.
or
through the base as shown in
Figure F.2. – A:
Electrical and Piping Routing
.
In making gas connections, avoid strains
as they may cause noise and damage the
controls. A backup wrench is required to be
used on the valve to avoid damage.
3. Size the gas line to the furnace adequate
enough to prevent undue pressure drop and
never less than 3/4” pipe. See
Section G.1.6
on
Gas Pipe Sizing and Capacity.
4. Install a drip leg or sediment trap in the gas
supply line as close to the unit as possible. See
Section G.2.1
on Drip Leg Requirements.
5. Install an outside ground joint union to
connect the gas supply to the control assembly
at the burner tray.
6. Gas valves have been factory installed. Install
a manual gas valve where local codes specify
a shut-off valve outside the unit casing.
(See
Figure G.2.1.)
7. Make sure piping is tight.
A pipe compound
resistant to the action of liquefied petroleum
gases must be used at all threaded pipe
connections.
8.
IMPORTANT:
Any additions, changes
or conversions required for the furnace to
satisfactorily meet the application should be
made by a qualified installer, service agency
or the gas supplier, using factoryspecified
or approved parts. In the commonwealth of
Massachusetts, installation must be performed
by a licensed plumber or gas fitter for
appropriate fuel.
IMPORTANT:
Disconnect the furnace and its
individual shutoff valve from the gas supply
piping during any pressure testing of that
system at test pressures in excess of 1/2 pound
per square inch gauge or isolate the system
from the gas supply piping system by closing
its individual manual shutoff valve during any
pressure testing of this gas supply system at
pressures equal to or less than 1/2 PSIG.
IMPORTANT:
Check the rating plate to make
certain the appliance is equipped to burn the
type of gas supplied. Care should be taken after
installation of this equipment that the gas control
valve not be subjected to high gas supply line
pressure.
ST-A1291-63-00
BACKUP WRENCH LOCATION
WHITE RODGERS GAS VALVE
Figure G.2. – A: Backup Wrench Location
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