SYSTEM OPERATION
20
B RRT G R JR R T R
T RRT R KT R T T
T
RRT KT
T B T R RR R RT
R T B RR B Q TR R R
G
This unit is configured for natural gas. The appropriate
manufacturer’s propane gas conversion kit, must be applied
for propane gas installations.
Refer to the specification sheet for the model you are
servicing. Refer to the “propane gas and/or High Altitude
Installations” section for details.
This unit is equipped with a 24 volt gas valve controlled
during furnace operation by the integrated control module.
appropriate propane gas conversion kit. Taps for measuring
the gas supply pressure and manifold pressure are provided
on the valve.
NOTE: The gas supply pressure on White-Rodgers “G/J”
model gas valve, can be checked with a gas pressure test
kit (Part #0151K00000S) available through our authorized
distributors.
The gas valve has a manual ON/OFF control located on
the valve itself. This control may be set only to the “ON” or
“OFF” position. Refer to the Lighting Instructions Label or the
“Putting the Furnace Into Operation” section of this manual or
the installation instructions for use of this control during start
up and shut down periods.
T
B TTR RT R QT G
T RRG QT T RR
TRR G G RG R T
TRTK T T R
The gas piping supplying the furnace must be properly sized
and length of the run. The gas line installation must comply
with local codes, or in their absence, with the latest edition of
the National Fuel Gas Code, NFPA 54/ANSI Z223.1.
Length of
Nominal Black Pipe Size
Pipe in Feet
1/2"
3/4"
1"
1 1/4"
1 1/2"
132
278
520
1050
1600
92
190
350
730
1100
73
152
285
590
980
63
130
245
500
760
56
115
215
440
670
50
105
195
400
610
46
96
180
370
560
43
90
170
350
530
40
84
160
320
490
38
79
150
305
460
CFH =
(Pressure 0.5 psig or less and pressure drop of 0.3" W.C.; Based on 0.60 Specific
Gravity Gas)
BTUH Furnace Input
Heating Value of Gas (BTU/Cubic Foot)
To connect the furnace to the building’s gas piping, the installer
cases, the installer may also need to supply a transition piece
from 1/2” pipe to a larger pipe size.
The following stipulations apply when connecting gas piping.
to the furnace.
piping.
2. Use pipe joint compound on male threads only. Pipe
joint compound must be resistant to the action of the
fuel used.
3. Use ground joint unions.
4. Install a drip leg to trap dirt and moisture before it can
enter the gas valve. The drip leg must be a minimum of
three inches long.
gage connection, immediately upstream of the gas
supply connection to the furnace.
6. Use two pipe wrenches when making connection to
the gas valve to keep it from turning. The orientation of
the gas valve on the manifold must be maintained as
shipped from the factory.
and unit within six feet of the unit. If a union is installed,
8. Tighten all joints securely.
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