Honeywell V4730A/V8730A, V4750A/V8750A Double Block Safety Shutoff Valves Operating instructions

Brand: Honeywell

Model: V4730A/V8730A, V4750A/V8750A Double Block Safety Shutoff Valves

Type: Operating instructions

PRODUCT DATA

® U.S. Registered Trademark

V4730A/V8730A, V4750A/V8750A

Double Block

Safety Shutoff Valves

APPLICATION

The V4730A/V8730A, V4750A/V8750A Double Block Valves

are used for control of gaseous fuels in gas-fired power

burners, atmospheric gas boilers, ovens, furnaces,

incinerators, roof-top units, makeup air units and other gas

consuming appliances.

FEATURES

• Double block safety shutoff valves for control of

gaseous fuels in gas consuming appliances in

accordance with international standards.

• Main body with two single-seat shutoff valves.

• Provides for mounting optional flanged pressure

switches.

• Closing time: < 1 second.

• Coils suitable for permanent energization.

• Fine mesh screen (strainer) between inlet flange and

main body.

• Various pressure tap points at main body available,

when no additional valves or pressure switches are

used.

• Plug connector according to DIN 43650, included.

• Adjustable maximum flow rate limiter (all models).

• Adjustable step opening pressure (V4750A/V8750A

only).

• Replaceable pipe flange adapters included.

• First and second internal shutoffs can be

independently energized for intermittent pilot

applications.

• Position indication lamp for each valve stage.

V4730A/V8730A

V4750A/V8750A

Contents

Application ........................................................................ 1

Features ........................................................................... 1

Specifications ................................................................... 2

Ordering Information ........................................................ 2

Installation ........................................................................ 4

Adjustments and Final Checkout ...................................... 5

Operation .......................................................................... 7

Troubleshooting ................................................................ 10

Service Information .......................................................... 10

V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES

65-0270—3 2

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the

TRADELINE® Catalog or price sheets for complete ordering number.

If you have additional questions, need further information, or would like to comment on our products or services, please write or

phone:

1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory).

2. Honeywell Customer Care

1885 Douglas Drive North

Minneapolis, Minnesota 55422-4386

In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.

International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,

Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

SPECIFICATIONS

The specifications in this section are related to the main valve.

The valve must be used in combination with a burner control.

Models: See Table 1.

Table 1. Model Number and Specifications.

Maximum Operating Pressure (UL):

2.9 psi (200 mBar), except for 1-1/4 in. size, which has

maximum operating pressure of 1.45 psi (100 mBar)—120V

model and 1 psi (70 mbar)—24V model

NOTE: CSA Certification to 1/2 psi.

Maximum Operating Pressure (CSA):

All valves are rated for 1/2 psi (35 mbar).

Connections:

1/8 in. (3 mm) pressure taps at inlet and outlet flanges. Eight

flange connections are provided at the main body to mount

either a pressure switch (low or high) or a Valve Proving

System (VPS).

Torsion and Bending Stress: Pipe connections meet

EN161, Group 2, requirements.

Electrical Equipment: Dc coils with combined rectifier inside

the cover.

Electrical Connection: Standard DIN plug connector with 36

in. (914 mm) leadwires, included.

Valve Position Indicator Lamps:

Inboard (closest to the valve body)—V1.

Outboard—V2.

Ambient Temperature Range: 5°F to 140°F (-15°C to

+60°C).

Model Number

Pipe Size (in.

NPT, Nominal)

Voltage Rating

(Vac, 50/60 Hz)

Current Rating in Amperes (A)

Capacity (cfh), Natural Gas (1 in.

w.c., delta P)

V1 V2 V1 + V2 With Screen Without Screen

V4730A1000 1/2 120 0.16 0.16 0.32 221 225

V4730A1018 3/4 359 362

V4730A1026 1 0.25 0.25 0.50 546 567

V4730A1034 1-1/4 582 634

V8730A1001 1/2 24 0.78 0.78 1.56 221 225

V8730A1019 3/4 359 362

V8730A1027 1 0.86 0.86 1.72 546 567

V8730A1035 1-1/4 582 634

V4750A1005 1/2 120 0.16 0.16 0.32 221 225

V4750A1013 3/4 359 362

V4750A1021 1 0.25 0.25 0.50 546 567

V4750A1039 1-1/4 582 634

V8750A1006 1/2 24 0.78 0.78 1.56 221 225

V8750A1014 3/4 359 362

V8750A1022 1 0.86 0.86 1.72 546 567

V8750A1030 1-1/4 582 634

V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES

3 65-0270—3

Coil Insulation Solenoid Valves: Class H insulation system.

Enclosure: IP 54 (NEMA 2).

Body Material: Aluminum alloy, die cast.

Strainer: Fine mesh screen (.0135 in. [0.34 mm] diameter),

AISI 303 steel, serviceable after removing inlet flange screws.

Meets EN 161 requirements for strainers.

Seals and Gaskets: Hydrocarbon resistant NBR and Viton

rubber types.

Flange Kit: Consists of one flange with sealing plug, 1 O-ring

and four screws.

Opening Time:

Dead time maximum: 1 second.

First valve opening: < 1 second.

Second valve opening: < 1 second.

Maximum Allowable Leakage:

Outerwall: 3 cu. in./hr (50 cm3/h) at test pressure of 0.087 psi

(6 mbar) and 7.83 psi (540 mbar).

First valve: 2.4 cu. in./hr, (40 cm3/h) at test pressure of 0.087

psi (6 mbar) and 7.83 psi (540 mbar).

Second valve: 2.4 cu. in./hr (40 cm3/h) at test pressure of

0.087 psi (6 mbar) and 7.83 psi (540 mbar).

High Pressure Test: In the Off condition, the valve will

withstand 21.75 psi (1.5 bar) inlet pressure without

damage.

NOTE: Attempts to operate the valve while in this condition

will not cause damage.

Closing Time: Less than 1 second for all valves.

Maximum Working Frequency: One cycle per minute.

Duty Cycle: Coil suitable for permanent energization in

cooperation with ignition controller.

Operational Voltage Range: The combination gas valve will

function satisfactorily between 85% and 110% of the rated

voltage.

Design Life: 500,000 cycles.

Dimensions: See Fig. 1-4.

Approvals:

Gas Appliance Directive 90.396/EEC.

PIN: 0063AT1198.

Low Voltage Directive: 73/23/EEC.

Electro Magnetic Compatibility Directive: 89/336/EEC.

CSA: File: Certificate Number: 158158-1227192.

Underwriters Laboratories, Inc. (UL): MH18476.

Accessories:

32006652-001 Flange for 1/2 in. valve.

32006652-002 Flange for 3/4 in. valve.

32006652-003 Flange for 1 in. valve.

32006652-004 Flange for 1-1/4 in. valve.

Fig. 1. Approximate dimensions of V4730A/V8730A

(1/2 in. and 3/4 in. pipe size) in in. (mm).

Fig. 2. Approximate dimensions of V4730A/V8730A

(1 in. and 1-1/4 in. pipe size) in in. (mm).

M21009C

7-7/32 (185)

1-27/32

(48)

4-7/32

(107)

5-1/4 (133)

6-1/2

(166)

2 (51)

2-1/32

(52)

3-7/8 (98)

1-11/16

(43)

PRESSURE

SWITCH

OPTIONAL

M21008C

7-7/32 (185)

1-27/32

(48)

4-7/32

(107)

5-1/4 (133)

7-5/16

(240)

2 (51)

2-1/32

(52)

3-7/8 (98)

1-11/16

(43)

PRESSURE

SWITCH

OPTIONAL

V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES

65-0270—3 4

Fig. 3. Approximate dimensions of V4750A/V8750A

(1/2 in. and 3/4 in. pipe size) in in. (mm).

Fig. 4. Approximate dimensions of V4750A/V8750A

(1 in. and 1-1/4 in. pipe size) in in. (mm).

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 make sure the product is suitable for your

application.

3. The installer must be a trained, experienced flame

safeguard technician.

4. After installation is complete, check out product

operation as provided in these instructions.

WARNING

Fire or Explosion Hazard.

Can cause serious injury, death or property

damage.

1. Turn off the gas supply before beginning installation.

2. Disconnect power supply to the valve actuator

before beginning installation to prevent electrical

shock and damage to the equipment.

3. Do not remove the seal over the valve inlet and

outlet until ready to connect piping.

4. The valve must be installed so that the arrow on the

valve points in the direction of the gas flow, so that

gas pressure helps to close the valve.

Mounting Position

The gas valve can be mounted plus or minus 90 degrees from

the vertical.

Mounting locations

The distance between the gas valve and the wall/ground must

be a minimum of 11-5/16 in. (30 cm).

Main Gas Connection

1. Take care that dirt does not enter the gas valve during

handling.

2. Remove the flanges from the valves.

3. Use new, properly reamed, pipe, free from chips.

4. Apply a moderate amount of good quality pipe dope,

resistant to the action of liquid propane (LP) gas only on

the pipe threads.

5. Screw the flanges onto the pipes.

6. Do not thread pipe too far into flange. Valve distortion or

malfunction can result from excess pipe in the flange.

7. Make sure O-ring sealing surfaces are clean.

8. Make sure that the inlet and out flanges are in line and

separated from each other enough to allow the valve to

be mounted between the flanges without damaging the

O-ring.

9. Using general purpose lithium grease, grease the

O-ring.

10. Install the O-ring in the O-ring grooves provided on the

valve bodies (one O-ring per groove).

11. Mount the gas valve between the flanges, using the

screws removed earlier.

12. Complete the electrical connections as instructed in the

Electrical Connection section.

M20581A

7-1/4 (185)

1-27/32

(48)

4-7/32

(107)

5-1/4 (133)

8-21/32

(220)

2 (51)

2-1/32

(52)

1-11/16 (43)

6-1/2

(166)

M20582A

7-1/4 (185)

1-27/32

(48)

4-7/32

(107)

5-1/4 (133)

9-7/16

(240)

2 (51)

2-1/32

(52)

1-11/16 (43)

7-5/16

(186)

V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES

5 65-0270—3

WARNING

Fire or Explosion Hazard.

Can cause property damage, severe injury or

death.

Perform a soap and water solution leak test any time

work is done on a gas system.

Electrical Connections

WARNING

Electrical Shock Hazard.

Can cause serious injury or death.

Disconnect the power supply before beginning wiring to

prevent electrical shock.

Wiring

1. Use 14, 16 or 18 AWG copper conductor, 600 volt

insulation, moisture-resistant wire for line voltage

connections. Recommended part numbers are

TTW60C, THW75C or THHN90C.

2. Follow the instructions supplied by the appliance

manufacturer. See Fig. 5 and 6 for reference.

Fig. 5. Four-pin electrical plug connector.

Fig. 6. Electrical connection diagram.

ADJUSTMENTS AND FINAL

CHECKOUT

The following procedures are related to the adjustments on

the main gas valve. For adjustment of the other devices (i.e.,

pressure switches), refer to the instructions supplied with the

applicable device.

WARNING

Fire or Explosion Hazard.

Can cause serious injury, death or property

damage.

Only fully qualified, experienced flame safeguard

technicians should make adjustments on the valve.

Pressure Tap Points (Fig. 7)

The V4730A/V8730A, V4750A/V8750A, have a number of

connection points for measuring pressure and/or mounting a

pressure switch.

The following pressures can be measured:

1. Inlet pressure—tap on inlet flange and on side of valve

body (1,2).

2. Interim pressure—pressure between the two shutoff

valves (3).

3. Outlet pressure—tap from flange (4).

The corresponding numbers (2, 3) can be found on the side of

the valve.

NOTE: To mount the C6097 Pressure Switch, refer to

instructions in form 65-0237, furnished with the

switch.

Fig. 7. Pressure tap points.

Second Valve, Fast Opening

(V4730A/V8730A)

To adjust the flow rate:

1. Remove the flat, round cap from the cover.

2. Using a 3 mm (7/64 in.) hex wrench, turn the adjustment

screw counterclockwise to increase or

clockwise to decrease the flow rate.

3. Snap the cap back on the cover.

(BLACK) 21

M20583

(YELLOW)

(GREEN)

(BLUE)

1FOR CONNECTION TO 1/2 INCH FLEXIBLE ELECTRICAL

CONDUIT ONLY. MAXIMUM TORQUE 65 INCH-POUNDS.

M20584

BLACK BLUE

YELLOW

M17985C

OPTIONAL

C6097

PRESSURE

SWITCH

V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES

65-0270—3 6

Second Valve, Slow Opening

(V4750A/V8750A)

Both the flow rate and the step pressure can be adjusted.

IMPORTANT

To ensure a satisfactory setting of the valve, the

pressure drop over the valve should be at least 10%

of the supply pressure or 1 in. w.c. (2.5 mBar),

whichever is greater.

To adjust the flow rate (Fig. 8 and 9):

1. Remove the cap from the top of the coil by loosening

both screws.

2. Place a wrench on the adjustment nut.

3. Turn the wrench counterclockwise to increase or

clockwise to decrease the flow rate.

Fig. 8. Removing the cap.

Fig. 9. Turning the adjustment nut.

To adjust the step pressure (FIg. 8 and 10):

1. Remove the cap from the top of the coil by loosening

both screws.

2. Place a screwdriver in the slot of the adjustment screw,

located in the center of the top of the valve.

3. Turn the screwdriver counterclockwise to

increase or clockwise to decrease step

pressure.

4. Replace the cap on top of the coil.

Fig. 10. Turning the step pressure adjustment screw.

Opening Speed Adjustment

Opening speed can be adjusted between one second

minimum and 90 second maximum (Fig. 11 and 12).

Fig. 11. Opening speed adjustment screw.

Fig. 12. Characterized opening.

M17979

M17980A

M17981

M17982B

SLOWER

OPENING

FASTER

OPENING

FLOW REGULATION

OPENING SPEED REGULATION

TIME M17983C

100% FLOW

0% FLOW

V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES

7 65-0270—3

Final Checkout of the Installation

Set the system in operation after any adjustment is completed

and observe several complete cycles to ensure that all burner

components function correctly.

OPERATION

The V4730A/V8730A, V4750A/V8750A are normally closed

valves. The valves open when energized and close when the

power is removed.

WARNING

Explosion Hazard and Electrical Shock Hazard.

Can cause explosion, serious injury or death.

1. Do not put the system into service until you have

satisfactorily completed the Valve Leak Test, all

applicable tests described in the Checkout section

of the instructions for the flame safeguard control

and any other tests required by the burner

manufacturer.

2. All test must be performed by a trained, experienced

flame safeguard technician.

3. Close all manual fuel shutoff valves immediately if

trouble occurs.

After the installation is complete, cycle the valve several times

with the manual fuel shutoff cock closed. Make sure the valve

functions properly. Also, perform the Valve Leak Test before

putting the valve into service.

Fig. 13 through 16 show the capacity of the valves with inlet

screens in place.

Fig. 13. Capacity of V4730A/V8730A; V4750A/V8750A 1/2 in. valves, with inlet screen.

100

CFH NATURAL GAS

PRESSURE

DROP

INCHES

W.C.

M19528

10 50 1000500 100005000

0.1

100

V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES

65-0270—3 8

Fig. 14. Capacity of V4730A/V8730A; V4750A/V8750A 3/4 in. valves, with inlet screen.

Fig. 15. Capacity of V473A0/V873A0; V4750A/V8750A 1 in. valves, with inlet screen.

100

CFH NATURAL GAS

PRESSURE

DROP

INCHES

W.C.

M19529

10 50 1000500 100005000

0.1

100

CFH NATURAL GAS

PRESSURE

DROP

INCHES

W.C.

M19530

10 50 1000500 100005000

0.1

100

V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES

9 65-0270—3

Fig. 16. Capacity of V4730A/V8730A; V4750A/V8750A 1-1/4 in. valves, with inlet screen.

Valve Leak Test (Fig. 17)

This is a test for checking the closure tightness of the gas

shutoff valve. It should be performed only by trained,

experienced flame safeguard technicians during the initial

startup of the burner system or whenever the valve is

replaced. It is recommended that this test also be included in

the scheduled inspection and maintenance procedures. For a

periodic inspection test, follow steps 1, 3, 4, 5, 8, 9, 10, 12, 13,

16 and 17.

1. De-energize the control system to make sure no power

goes to the valve (C, Fig. 10).

2. Close the upstream manual gas cock (A).

3. Make sure the manual test petcock (F) is closed in the

leak test tap assembly (D).

4. Remove the leak test tap plug and connect the test

apparatus to the leak test tap (D).

5. Close the downstream manual gas cock (E).

6. Open the upstream manual gas cock (A).

7. Run the valve to its open position (through the safety

system); then immediately de-energize the system to

close the valve.

8. Immerse an 1/4 in. (6 mm) tube vertically 1/2 in. (13

mm) into a jar of water.

9. Slowly open the manual test petcock (F).

10. When the rate of bubbles coming through the water

stabilizes, count the number of bubbles appearing

during a ten-second period. Each bubble appearing

during a 10 second period represents a flow rate of

0.001 cfh (28 cch).

11. Close the upstream manual gas cock (A).

12. Remove the leak test tap from the valve body.

13. Using a small amount of pipe sealant on the 1/8 in.

(3 mm) NPT plug, reinstall the plug in pressure tap

point P.

14. To test the second SSOV, remove the 1/8 in. (3mm)

NPT plug from the flange pressure tap point 4.

15. Install the leak test tap into pressure tap point 4.

16. Close the downstream manual gas cock E.

17. Immerse the 1/4 in. (6 mm) tube vertically 1/2 in.

(13 mm) into a jar of water.

18. Slowly open the manual test petcock (F).

19. When the rate of bubbles coming through the water

stabilizes, count the number of bubbles appearing

during a ten-second period. Each bubble appearing

represents a flow rate of 0.001 cfh (28 cch). See

Table 3.

20. Remove the leak test tap from the valve body.

21. Using a small amount of pipe sealant on the 1/8 in.

(3 mm) NPT plug, reinstall the plug in pressure tap

point 4.

Table 2. Maximum Bubbles per Pipe Size.

100

CFH NATURAL GAS

PRESSURE

DROP

INCHES

W.C.

M19531

10 50 1000500 100005000

0.1

100

Pipe Size (in.

NPT)

Maximum Seat

Leakage (UL)

Maximum Number

of Bubbles in 10

seconds

1/2 - 3/4 235 cch 6

1 275 cch 7

1-1/4 340 cch 8

V4730A/V8730A, V4750A/V8750A DOUBLE BLOCK SAFETY SHUTOFF VALVES

65-0270—3 10

Fig. 17. Valve leak test.

After the Test

1. Close the upstream manual gas cock (A).

2. Close the manual test petcock (F), remove the test

apparatus, and close the leak test tap (D).

3. Make sure the downstream manual gas cock (E) is

closed.

4. Open the upstream manual gas cock (A) and energize

the valve through the safety system.

5. Test with rich soap and water solution to make sure

there is no leak at the test tap (D) or any pipe adapter/

valve mating surfaces.

6. De-energize the valve (C).

7. Open the downstream manual gas cock (E).

8. Restore the system to normal operation.

TROUBLESHOOTING

WARNING

Electrical Shock Hazard.

Can cause serious injury or death.

Use extreme caution while troubleshooting; line

voltage is present.

IMPORTANT

Do not replace the valve until all other sources of

trouble are eliminated.

Troubleshooting Procedure

If the valve does not open when the thermostat or controller

calls for heat:

1. Check for line voltage at the valve leadwires or terminal

block.

2. If there is no voltage at the valve leadwires or terminal

block, make sure:

a. line voltage power is connected to the master

switch.

b. master switch is closed and overload protection

(circuit breaker, fuse or similar device) has not

opened the power line.

3. If there is still no voltage at the valve leadwires or

terminal block, make sure all appropriate contacts in the

thermostat or controller, limits and flame safeguard

controls are closed. If one or more are open, determine

the cause(s); correct the trouble and proceed.

4. If there is proper voltage at the valve but the valve still

does not open, check for normal gas pressure.

5. If the valve still does not open, replace the valve.

If the valve does not close when one or more of the

appropriate contacts in the thermostat, controller, limits or

flame safeguard control is open:

1. Make sure the valve is wired in the correct circuit.

2. Open the master switch to remove power from the

valve.

3. If the valve closes now, check the wiring for the valve

and correct the wiring as necessary.

4. Check for a short in the electrical circuit and repair it as

necessary.

SERVICE INFORMATION

WARNING

Explosion Hazard and Electrical Shock Hazard.

Can cause explosion, serious injury or death.

Turn off gas supply and disconnect all electrical power

to the valve before servicing.

IMPORTANT

Only trained, experienced flame safeguard control

technicians should attempt to service or repair flame

safeguard controls and burner assemblies.

Scheduled Inspection and Maintenance

Set up and follow a schedule for periodic inspection and

maintenance, including the burner, all other controls and the

valves. It is recommended that the valve leak test in the

Checkout section be included in this schedule. Refer to the

instructions for the primary safety control(s) for more

inspection and maintenance information.

M9547F

GAS

SUPPLY

UPSTREAM

MANUAL

GAS COCK

DOWNSTREAM

MANUAL

GAS COCK

BURNER

DABC E

PRV

MANUAL

TEST

PETCOCK

SSOV

1/4 IN. (6 MM)

FLEXIBLE

TUBING

1/4 IN. (6 MM)

ALUMINUM OR

COPPER PILOT

TUBING JAR OR GLASS

WITH WATER

CUT AT

45 DEGREE

ANGLE

CAN ALSO BE A PERMANENT PETCOCK.

PRV = PRESSURE REGULATING VALVE.

SSOV = SAFETY SHUTOFF VALVE.

USE THE DOWNSTREAM TAP ON THE SS0V.

2 3

2(13 MM)

LEAK

TEST

TAP

11 65-0270—3

65-0270—3 G.R. Rev. 11-04 www.honeywell.com

Automation and Control Solutions Honeywell International Honeywell Europe S.A. Honeywell Latin American

Honeywell International Inc. Honeywell Limited-Honeywell Limitée Control Products 3 Avenue du Bourget Region

1985 Douglas Drive North 35 Dynamic Drive Honeywell Building 1140 Brussels 480 Sawgrass Corporate Parkway

Golden Valley, MN 55422 Scarborough, Ontario 17 Changi Business Park Central 1 Belgium Suite 200

M1V 4Z9 Singapore 486073 Sunrise FL 33325

Honeywell V4730A/V8730A, V4750A/V8750A Double Block Safety Shutoff Valves Operating instructions

Honeywell V4730A/V8730A, V4750A/V8750A Double Block Safety Shutoff Valves Operating instructions

Honeywell V4730A/V8730A, V4750A/V8750A Double Block Safety Shutoff Valves Operating instructions

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