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USING ADAPTERS TO SOLVE SWING RADIUS
PROBLEMS
In some field service applications, it is difficult or im-
possible to thread the control onto the gas supply pipe
because of space limitations. Usually this problem can be
resolved by using an adapter. The adapter is installed on the
end of the supply pipe in place of the gas control, following
the same precautions and instructions that are used for
installing the gas control. After the adapter is installed, the
gas control is attached to the adapter as outlined above.
Note that the use of an adapter increases the overall length
of the gas control.
Fig. 2—Fasten flange to control with 25 inch-
pounds torque.
VALVE OUTLET
FLANGE
9/64 INCH HEX SCREWS (4)
DO NOT OVERTIGHTEN SCREWS. TIGHTEN TO
1
25 INCH-POUNDS.
Fig. 3—Sediment trap installation.
DROP
PIPED
HORIZONTAL
GAS
SUPPLY
GAS
CONTROL
3 INCHES
[76]
MINIMUM
2
DROP
HORIZONTAL
TUBING
GAS
1
SUPPLY
GAS
CONTROL
RISER
3 INCHES
[76]
MINIMUM
2
ALL BENDS IN METALLIC TUBING SHOULD BE SMOOTH.
1
2
CAUTION: SHUT OFF THE MAIN GAS SUPPLY BEFORE REMOVING
END CAP TO PREVENT GAS FROM FILLING THE WORK AREA. TEST
FOR GAS LEAKAGE WHEN INSTALLATION IS COMPLETE.
6/32 INCH ROUND
SCREWS (1)
CONDUIT
COVER,
VR4204
ONLY
1
M9050
GAS
CONTROL
RISER
PIPED
GAS
SUPPLY
3 INCHES
[76]
MINIMUM
2
M3077
5
LOCATION
The combination gas control is mounted in the appli-
ance vestibule on the gas manifold. If this is a replacement
application, mount the gas control in the same location as
the old control.
Locate the combination gas control where it cannot be
affected by steam cleaning, high humidity, or dripping
water, corrosive chemicals, dust or grease accumulation or
excessive heat. To assure proper operation, follow these
guidelines:
• Locate gas control in a well-ventilated area.
• Mount gas control high enough above the cabinet
bottom to avoid exposure to flooding or splashing
water.
• Assure the ambient temperature does not exceed the
ambient temperature ratings for each component.
• Cover gas control if appliance is cleaned with water,
steam, or chemicals or to avoid dust and grease
accumulation.
• Avoid locating gas control where exposure to corro-
sive chemical fumes or dripping water are likely.
Install Piping To Gas Control
All piping must comply with local codes and ordinances
or with the National Fuel Gas Code (ANSI Z223.1 NFPA
No. 54), whichever applies. Tubing installation must com-
ply with approved standards and practices.
1. Use new, properly reamed pipe free from chips. If
tubing is used, make sure the ends are square, deburred and
clean. All tubing bends must be smooth and without defor-
mation.
2. Run pipe or tubing to the control. If tubing is used,
obtain a tube-to-pipe coupling to connect the tubing to the
control.
3. Install sediment trap in the supply line to the gas
control. See Fig. 3.
Install Control
1. This control can be mounted 0-90 degrees, in any
direction, including vertically, from the upright position of
the gas control knob.
2. Mount the control so gas flow is in the direction of
the arrow on the bottom of the control.
3. Thread pipe into control or adapter. Do not thread
pipe too far. Valve distortion or malfunction may result if
the pipe is inserted too deeply. Refer to Table 4.
TABLE 4—NPT PIPE THREAD LENGTH IN in.
Pipe
Thread Pipe
Maximum Depth Pipe Can
Size
This Amount
3/8
9/16
1/2
3/4
3/4
13/16
4. Apply a moderate amount of good quality pipe com-
pound (do not use Teflon tape) to pipe only, leaving two
end threads bare. On LP installations, use compound resis-
tant to LP gas.
VR8204; VR4204
INSTALLATION
Be Inserted Into Control
3/8
1 /2
3/4
68-0047—2
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