Honeywell VR8304 User Manual

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VR8304 Intermittent Pilot Combination Gas Control

INSTALLATION INSTRUCTIONS

APPLICATION

These intermittent pilot gas controls are used in gas-fired appliances with capacities up to 300 ft pressure drop (8.5 m They include a manual valve, two automatic operators, and a pressure regulator. See Table 1 for temperature ranges and regulator types.

Table 1. Temperature ranges and regulator types

Model number

VR8304H 0 F to 175 F

VR8304K -40 F to 175 F

VR8304M -40 F to 175 F

VR8304P -40 F to 175° F

/h at 0.25 kPa) on natural gas.

Ambient

temperature range Regulator type

(-18 C to +79 C)

(-40 C to +79 C)

/hr at 1 in. WC

Slow-opening

Slow opening

Standard-opening

Step-opening

SPECIFICATIONS

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 3/8, 1/2 and 3/4 in.

straight and angle connections. Refer to Table 2.

Electrical Ratings: voltage and frequency: 24 Vac,

50/60 Hz.

Current Draw: 0.7A.

Capacity: See Table 3.

Approvals:

• American Gas Association Design Certificate: UP-70-69A

• Canadian Gas Association Design Certificate: UP-70-69A.

• Australian Gas Association Certificate: Applied for.

• Delta C: Applied for.

Inlet/outlet pipe size Flange type Part number

3/8 inch NPT Straight 393690-11

1/2 inch NPT Elbow 393690-13

3/4 inch NPT Straight 393690-4

NOTE: Flange kits include one flange with attached O-

(inlet x outlet)

1/2 x 1/2

1/2 X 3/4

3/4 X 3/4

Capacity based on 1000 Btu/ft3, 0.64 specific gravity

natural gas at 1 in. WC pressure drop (37.3 MJ/m

0.64 specific gravity natural gas at 0.25 kPa pressure drop.

Use conversion factors in Table 4 to convert capacities for other gases.

Manufactured 0.60 0.516

Mixed 0.70 0.765

Propane 1.53 1.62

Table 2. Flange part numbers

Elbow 393690-15

ring and fan mounting screw.

Table 3. Capacity

Capacity at 1 in.

Size

WC pressure

drop

/hr

240 ft

/hr)

(6.8 m

/hr

270 ft

/hr)

(7.6 m

/hr

300 ft

/hr)

(8.5 m

Table 4. Gas capacity conversion factors

Gas Specific gravity

Minimum regulated

capacity

30 ft

/hr

(0.8 m

30 ft

/hr

(0.8 m

30 ft

/hr

(0.8 m

Maximum regulated

capacity

340 ft

/hr)

(9.6 m

370 ft

/hr)

(10.5 m

415 ft

/hr)

(11.8 m

Multiply listed

capacity by

/hr

/hr)

/r)

69-0625—03

VR8304 INTERMITTENT PILOT COMBINATION GAS CONTROL

WARNING

CAUTION

WARNING

INSTALLATION

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 ensure the product is suitable for your application.

3. Ensure installer is a trained, experienced service technician.

4. After installation is complete, use these instructions to check out product operation.

Fire or explosion hazard. Can cause property damage, severe injury, or death.

Follow these warnings exactly:

1. Disconnect power supply before wiring to prevent electrical shock or equipment damage.

2. To avoid dangerous accumulation of fuel gas, turn off gas supply at the appliance service valve before starting installation, and perform the 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 the gas control knob. Use only your hand to turn the gas control knob. Never use tools. If the gas control knob will not operate by hand, the gas control should be replaced by a qualified service technician. Force or attempted repair may result in fire or explosion.

Never apply a jumper across or short the valve coil terminals. This may burn out the heat anticipator in the thermostat or damage the electronic intermittent pilot (IP) module.

IMPORTANT

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

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

Converting Between Natural and LP Gas

Fire or explosion hazard. Can cause property damage, severe injury, or death.

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

To convert a gas control from natural gas to LP gas or from LP gas to natural gas, contact your Honeywell representative.

Standard- or slow-opening gas controls are converted from one gas to another with a conversion kit (order separately). Order Part Number 393691 to convert from natural to LP gas. Order Part Number 394588 to convert from LP to natural gas. Step-opening gas controls cannot be converted.

Install Adapters to Gas Control

Install adapters to the gas control 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 in 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. 1. Tighten the screws to 25 in. pounds of torque to provide a gas-tight seal.

9/64 INCH HEX SCREWS (4)

GAS CONTROL OUTLET

FLANGE

1 DO NOT OVERTIGHTEN SCREWS.

TIGHTEN TO 25 INCH POUNDS.

Fig. 1. Install flange to gas control.

M3087

Bushings

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

2. Apply moderate amount of good quality pipe com-

pound to the bushing, leaving two end threads bare. On LP installation, use a compound resistant to LP gas. Do not use Teflon tape.

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

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. This problem can be resolved in many instances 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.

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Choose Gas Control Location

GAS CONTROL

HORIZONTAL

DROP

PIPED GAS SUPPLY

3 IN.

(76 MM)

MINIMUM

3 IN.

(76 MM)

MINIMUM

RISER

GAS CONTROL

TUBING GAS SUPPLY

HORIZONTAL

DROP

3 IN.

(76 MM)

MINIMUM

RISER

M3077A

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.

OUTLET PRESSURE TAP

INLET

OUTLET

WIRING TERMINALS (3)

INLET PRESSURE TAP

PRESSURE REGULATOR ADJUSTMENT (UNDER CAP SCREW)

PILOT OUTLET

PILOT ADJUSTMENT (UNDER CAP SCREW)

GAS CONTROL KNOB

RED RESET BUTTON

M1639C

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 the gas control in a well ventilated area.

• Mount the gas control high enough above the 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 the gas control if the appliance is cleaned with water, steam, or chemicals or to avoid dust and grease accumulation.

• Avoid locating the 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 the Gas Control

All piping must comply with local codes and ordinances or with the National Fuel Gas Code (ANSIZ223.1 NFPA No.

54), whichever applies. Tubing installation must comply with approved standards and practices.

1. Use new, properly reamed pipe free of chips. If tubing is used, ensure the ends are square, deburred and clean. All tubing bends must be smooth and without deformation.

2. Run a 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 a sediment trap in the supply line to the gas control. See Fig. 2.

Install the Gas Control

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

from the upright position of the gas control knob, including vertically. Mount the gas control so that gas flow is in the direc-

tion of the arrow on the bottom of the gas control.

3. Thread the pipe the amount shown in Table 5 for insertion into the gas control or adapter. DO NOT THREAD THE PIPE TOO FAR. Valve distortion or malfunction may result if the pipe is inserted too deeply into the gas control.

4. Apply a moderate amount of good quality pipe compound (DO NOT use Teflon tape) to the pipe only, leaving two end threads bare. On LP installations, use a compound resistant to LP gas. Refer to Fig. 3.

5. Remove the seals over the gas control inlet and outlet if necessary. 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 Figs. 4 and 5.

Table 5. NPT pipe thread length (inches)

Pipe size

318 9/16 3/8

1/2 3/4 1/2

3/4 13/16 3/4

Thread pipe this

amount

Maximum depth pipe

can be inserted into the

control

VR8304 INTERMITTENT PILOT COMBINATION GAS CONTROL

Fig. 2. Install a sediment trap.

TWO IMPERFECT THREADS

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

GAS CONTROL

PIPE

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

M3075B

Fig. 3. Use a moderate amount of pipe compound.

Fig. 4. Top view of gas control.

Connect Pilot Gas Tubing

1. Cut tubing to desired length and bend as necessary

for routing to the pilot burner. Do not make sharp bends or deform the tubing. Do not bend tubing at gas control or pilot burner after compression fitting has been tightened, as this may result in gas leakage at the connection. Square off and remove burrs from the ends of tubing.

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