Honeywell VR4200A Manual Download Page 6

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68-0046—4

VR8200, VR4200

INSTALLATION

3. Insert bushing in gas control and thread pipe carefully

into bushing until tight.

Complete the instuctions below for piping, installing

control, connecting pilot trubing, thermocouple and wiring.
Make certain the leak test you perform on the control after
completing the installation includes leak testing the adapters
and screws. If you use a wrench on the valve after flanges are
installed, use the wrench only on the flange, not on the
control.

USING ADAPTERS TO SOLVE SWING RADIUS
PROBLEMS

In some field service applications, it is difficult or

impossible to thread the gas 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 using an adapter increases the
overall length of the gas control.

CHOOSE GAS CONTROL LOCATION

Do not locate the gas control where it may be affected by

steam cleaning, high humidity, dripping water, corrosive
chemicals, dust or grease accumulation, or excessive heat. To
ensure proper operation, follow these guidelines:

• Locate gas control in a well-ventilated area.
• Mount gas control high enough above cabinet bottom

to avoid exposure to flooding or splashing water.

• Ensure the ambient temperature does not exceed the

ambient temperature ratings for each component.

• Cover gas control if the appliance is cleaned with

water, steam, or chemicals to avoid dust and grease
accumulation.

• Avoid locating gas control where exposure to corro-

sive chemical fumes or dripping water are likely.

Locate the gas control in the appliance vestibule on the

gas manifold. In replacement applications, locate the gas
control in the same location as the old gas control.

Install Piping to Gas Control

All piping must comply with local codes and ordi-

nances or with the National Fuel Gas Code (ANSI Z223.1
NFPA No. 54), whichever applies. Tubing installation must
comply with approved standards and practices.

1. Use new, properly reamed pipe free from chips. If

tubing is used, ensure the ends are square, deburred and clean.
All tubing bends must be smooth and without deformation.

2. Run pipe or tubing to the gas control. If tubing is

used, obtain a tube-to-pipe coupling to connect the tubing
to the gas control.

3. Install sediment trap in the supply line to the gas

control. See Fig. 6.

Install Gas Control

1. Mount the gas control 0-90 degrees, in any direction,

from the upright position of the gas control knob, including
vertically.

2. Mount the gas control so gas flow is in the direction

of the arrow on the bottom of the gas control.

3. Thread pipe into gas control. Do not thread pipe too far.

Valve distortion or malfunction can result if the pipe is inserted
too deeply into the gas control. Refer to Table 4.

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 resistant to
LP gas. (See Fig. 7.)

Fig. 7—Use moderate amount of pipe compound.

Fig. 6—Install sediment trap.

GAS
CONTROL

HORIZONTAL

DROP

PIPED
GAS
SUPPLY

3 INCHES
[76]
MINIMUM

RISER

GAS
CONTROL

TUBING
GAS
SUPPLY

HORIZONTAL

DROP

3 INCHES
[76]
MINIMUM

RISER

M3077

ALL BENDS IN METALLIC TUBING SHOULD BE SMOOTH.

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.

TABLE 4—NPT PIPE THREAD LENGTH IN INCHES.

Maximum Depth

Pipe

Thread Pipe

Pipe can be Inserted

Size

This Amount

into Control

3/8

9/16

3/8

1/2