Honeywell VR8300A User Manual

VR8300A Continuous Pilot Combination

Gas Control

INSTALLATION INSTRUCTIONS

APPLICATION

These continuous pilot gas controls are used in gas-fired
appliances with capacities up to 200 cfh at 1 in. wc
pressure drop (5.7 cmh at 0.25 kPa) on natural gas.
Included are a manual valve, safety shutoff, two automatic
operators, and a pressure regulator. See Table 2 for
temperature range and regulator type.

The VR8300 setup for natural gas includes a 39369 LP
Conversion Kit. The kit contains a new cap screw, a
pressure regulator adjustment screw, a tapered spring and
a conversion label. The control must be equipped with a
standard servo pressure regulator. Step-opening gas
controls cannot be converted.

Capacity:

Gravity

Capacity at 1 in. wc

Pressure Drop

Multiply Listed

Capacity By

Size (Inlet x Outlet)

1/2 in. x 1/2 in. 180 cfh (5.1 cmh) 30 cfh (0.8 cmh) 225 cfh (6.4 cmh)
1/2 in. x 3/4 in. 190 cfh (5.4 cmh) 30 cfh 0.8 cmh) 290 cfh (8.2 cmh)
3/4 in. x 3/4 in. 200 cfh (5.7 cmh) 30 cfh (0.8 cmh) 300 cfh (8.5 cmh)

a

Capacity based on 1000 Btu/cu ft, 0.64 specific gravity natural gas at 1 in. wc pressure drop (37.3 MJ/cu m, 0.64 specific
gravity natural gas at 0.25 kPa pressure drop).

Use conversion factors in Table 1 to convert capacities for
other gases.

Table 1. Gas Capacity Conversion Factors.

Gas

Manufactured 0.60 0.516
Mixed 0.70 0.765
Propane 1.53 1.62

Specific

a

Body Pattern:

Straight-through body pattern.

Inlet x Outlet Sizes Available:

1/2 x 1/2 in., 1/2 x 3/4 in., and 3/4 x 3/4 in. (factory-installed
inlet flange).

Adapters:

Adapters available for 1/2 and 3/4 in. straight and angle
connections. Refer to Table 3.

Electrical Ratings:

Voltage and Frequency: 24 Vac, 50/60 Hz.
Current Draw: 0.70A.

Minimum Regulated

Capacity

Table 3. Flange Part Numbers.

Inlet/Outlet

Pipe Size

1/2 in. NPT Straight 393690-6 393690-16

3/4 in. NPT Straight 393690-4 393690-14

Flange

Type

Elbow 393690-3 393690-13

Elbow 393690-5 393690-15

Maximum Regulated

Capacity

Part Number

Without Hex

Wrench

With Hex

Wrench

Table 2. Temperature Range and Regulator Type.

Ambient

Model

Number

VR8300A 0° to 175° 18° to 79° Standard-opening

®U.S. Registered Trademark
Copyright © 1998 Honeywell Inc. • All Rights Reserved

Temperature Range

°F °C

Regulator

Type

NOTE: Flange kits include one flange with attached

O-ring and fan mounting screw.

Approvals:

International Approval Services Listed: L2025007.
Australian Gas Association Certificate: Applied for.
Delta C: Pending approval.

X-XX UL

69-0668-1

VR8300A CONTINUOUS PILOT COMBINATION GAS CONTROL

INSTALLA TION

When Installing this Product…

1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard­ous condition.

2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.

3. Installer must be a trained, experienced service
technician.

4. After installation is complete, check out product
operation as provided in these instructions.

W ARNING

Fire or Explosion Hazard.
Can cause property damage, severe injury,
or death.

Follow these warnings exactly:

1. Disconnect power supply before installing or
servicing.

2. To avoid dangerous accumulation of fuel gas,
turn off gas supply at the appliance service
valve before starting installation, and perform
Gas Leak Test after completion of installation.

3. Do not bend pilot tubing at gas control or pilot
burner after compression fitting has been
tightened, or gas leakage at the connection
may result.

4. Always install sediment trap in gas supply line
to prevent contamination of gas control.

5. Do not force gas control knob. Force or
attempted repair may result in fire or explo­sion. Use only your hand to push down the
reset button or turn the gas control knob.
Never use any tools. If the gas control knob or
reset button does not operate by hand, the
gas control should be replaced by a qualified
service technician.

CA UTION

Equipment Hazard.
Improper installation can burn out thermostat
heat anticipator.

Do not apply a jumper across or short the valve
coil terminals.

IMPORTANT

These gas controls are shipped with protective
seals over inlet and outlet tappings. Do not
remove seals until ready to connect piping.

Follow the appliance manufacturer instructions if available;
otherwise, use the instructions provided below.

Converting Between Natural and LP Gas

W ARNING

Fire or Explosion Hazard.
Can cause property damage, severe injury,
or death.

1. Do not use a gas control set for natural gas on
LP gas or a gas control set for LP gas on
natural gas.

2. When making the conversion, the main and
pilot burner orifices MUST be changed to
meet the specifications of the appliance
manufacturer.

Standard or slow-opening gas controls can be converted
from one gas to another. To convert from natural gas to
LP, use the 393691 LP Conversion Kit that is included with
the VR8300A Gas Control. To convert from LP to natural
gas, use the 394588 Natural Gas Conversion Kit (order
separately). Step-opening gas controls cannot be con­verted.

To convert the control from one gas to another:

1. Turn off the main gas supply to the appliance.

2. Remove the regulator cap screw and pressure

regulator adjusting screw. See Fig. 5.

3. Remove the existing spring.

4. Insert the replacement spring with the tapered end

down. See Fig. 1.

5. Install the new plastic pressure regulator adjustment
screw so that the top of the screw is flush (level) with
the top of the regulator. Turn the pressure regulator
adjustment screw clockwise six complete
turns. This provides a preliminary pressure setting of
about 10.0 in. wc (2.5 kPA) for an LP regulator and a

3.5 in. wc (0.9 kPA) for a natural gas regulator.

6. Check the regulator setting with a manometer or by
clocking the gas meter. See the Startup and
Checkout section.

7. Install the new cap screw.

8. Mount the conversion label on the control.

9. Install the control and the appliance according to the

appliance manufacturer instructions.

Install Adapters to Gas Control

If installing adapters on the gas control, mount them
as follows:

Flanges:

1. Choose the appropriate flange for your application.

2. Remove the seal over the gas control inlet or outlet.

3. Ensure the O-ring is fitted into the groove of the

flange. If the O-ring is not attached or is missing, do
not use the flange.

4. With the O-ring facing the gas control, align the
screw holes on the gas control with the holes in the
flange. Insert and tighten the screws provided with
the flange. See Fig. 2. Tighten the screws to 25 in. lb
of torque to provide a gas-tight seal.

69-0668—1

2

VR8300A CONTINUOUS PILOT COMBINATION GAS CONTROL

COLOR CODE FOR

NATRUAL

LP

GAS

CAP SCREW BLACK SILVER
PRESSURE

REGULATOR
ADJUSTING
SCREW

TAPERED
SPRING

GAS

WHITE WHITE

STAINLESS

RED

STEEL

GAS CONTROL
INLET

FLANGE

PRESSURE
REGULATOR
HOUSING

M16015

Fig. 1. Install conversion kit in regulated gas control.

Bushings:

1. Remove the seal over the gas control inlet or outlet.

IMPORTANT

On LP installations, use a compound resistant to
LP gas. Do not use Teflon tape.

2. Apply moderate amount of good quality pipe
compound to bushing, leaving two end threads bare.

3. Insert bushing in gas control and thread pipe
carefully into bushing until tight.

Follow the instructions below for piping, installing control,
connecting pilot tubing, 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 the control.

Use 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. This problem can usually 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.

1

9/64 IN. (3.6 MM)

1 DO NOT OVERTIGHTEN SCREWS.
TIGHTEN TO 25 IN. LB.

HEX SCREWS (4)

M803

Fig. 2. Install flange to gas control.

Choose Gas Control Location

Do not locate the gas control where it can 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 the cabinet
bottom to avoid exposure to flooding or splashing
water.

• Make sure 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 corrosive
chemical fumes or dripping water is 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 ordinances 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, make sure 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. 3.

3

69-0668—1

VR8300A CONTINUOUS PILOT COMBINATION GAS CONTROL

Install Gas Control

To install:

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

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

2. Mount the gas control so the gas flow is in the
direction of the arrow on the bottom of the gas
control.

3. Thread pipe the amount shown in Table 4 for
insertion into the 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. See
Fig. 3.

DROP

HORIZONTAL

3 IN.

(76 MM)

MINIMUM

HORIZONTAL

RISER

(76 MM)

MINIMUM

ALL BENDS IN METALLIC TUBING SHOULD BE SMOOTH.

1

CAUTION: SHUT OFF THE MAIN GAS SUPPLY BEFORE REMOVING

2

END CAP TO PREVENT GAS FROM FILLING THE WORK AREA. TEST
FOR GAS LEAKAGE WHEN INSTALLATION IS COMPLETE.

TWO IMPERFECT
THREADS

PIPED
GAS
SUPPLY

GAS
CONTROL

2

DROP

TUBING

1

3 IN.

GAS
SUPPLY

2

GAS
CONTROL

2

Fig. 3. Sediment trap installation.

GAS CONTROL

RISER

PIPED
GAS
SUPPLY

3 IN.

(76 MM)

MINIMUM

GAS
CONTROL

M3077

IMPORTANT

On LP installations, use compound resistant to
LP gas. Do not use Teflon tape.

4. Apply a moderate amount of good quality pipe
compound (DO NOT use Teflon tape) to pipe only,
leaving two end threads bare. On LP installations,
use compound resistant to LP gas.

5. Remove seals over the gas control inlet and outlet if
necessary.

6. Connect the pipe to the gas control inlet and outlet.
Use a wrench on the square ends of the gas control.
If an adapter is used, place the wrench on the
adapter rather than the gas control. Refer to Fig. 5
and 6.

PRESSURE REGULATOR
ADJUSTMENT
(UNDER CAP SCREW)

OUTLET
PRESSURE
TAP

INLET

THERMOCOUPLE
CONNECTION

RED RESET BUTTON

CONVENIENCE
TERMINALS (2)
(OPTIONAL)

GAS
CONTROL
KNOB

WIRING
TERMINALS (2)

OUTLET
PRESSURE
TAP

OUTLET

PILOT OUTLET

PILOT ADJUSTMENT
(UNDER CAP SCREW)

Fig. 5. Top view of gas control.

APPLY WRENCH
TO FLANGE ONLY

M16013

PIPE

THREAD PIPE THE AMOUNT
SHOWN IN TABLE FOR
INSERTION INTO GAS CONTROL

APPLY A MODERATE AMOUNT OF
PIPE COMPOUND TO PIPE ONLY
(LEAVE TWO END THREADS BARE).

Fig. 4. Use moderate amount of pipe compound.

Table 4. NPT Pipe Thread Length in in.

Pipe

Size

Thread Pipe

this Amount

Maximum Depth Pipe can

be Inserted into Control

3/8 in. 9/16 in. 3/8 in.
1/2 in. 3/4 in. 1/2 in.
3/4 in. 13/16 in. 3/4 in.

69-0668—1

M3075B

Fig. 6. Proper use of wrench on gas control.

Connect Pilot Gas Tubing

1. Cut tubing to desired length and bend as necessary

for routing to pilot burner. Do not make sharp bends
or deform the tubing. Do not bend tubing at gas
control or pilot burner after compression fitting is
tightened, because this can result in gas leakage at
the connection.

4

M16012