Honeywell V4730B User manual

PRODUCT DATA
® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved 65-0275—2
V4730B/V8730B, V4750B/V8750B
Class A Double Block and Pressure
Regulating Safety Shutoff Valves
APPLICATION
The V4730B/V8730B, V4750B/V8750B Class A Double Block
Pressure Regulating Valves are used for pre-mix burner
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
• Class A double block safety shutoff valves for control
of pre-mix gaseous fuels in gas consuming appliances
in accordance with international standards.
• Provides safety shutoff and pressure regulation
control of main gas flow.
• Main body with two single-seat shutoff valves.
• Provides for mounting optional flanged pressure
switches.
• Closing time: < 1 second.
• Coils suitable for permanent energization.
• 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, pre-wired with
36 in. (914 mm) leads, included.
• Adjustable maximum flow rate limiter (all models).
• Adjustable step opening pressure and opening timing
(V4750B/V8750B 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.
V4750B/V8750B
V4730B/V8730B
Contents
Application ........................................................................ 1
Features ........................................................................... 1
Specifications ................................................................... 2
Ordering Information ......................................................... 2
Installation ........................................................................ 4
Adjustments and Final Checkout ...................................... 7
Operation .......................................................................... 9
Troubleshooting ................................................................ 10
Service Information .......................................................... 10

V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES
65-0275—2 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.
aDelta P = 1 in. wc; natural gas; gas sp gr = 0.64.
Maximum Operating Pressure (UL):
2.9 psi (200 mbar), except for 1-1/4 in size:
1.45 psi (100 mBar)—120V;
1 psi (70 mbar)—24V.
NOTE: CSA Certification to 1/2 psi.
Maximum Operating Pressure (CSA):
1/2 psi (35 mbar).
Outlet Pressure Regulator Adjustment:
1.2 - 15 in. wc.
Connections:
1/8 in. (3 mm) NPT pressure taps at inlet and outlet flanges.
Six flange connections are provided at the main body to
mount either a pressure switch (low or high) or a Valve
Proving System (VPS). See Fig. 7.
Torsion and Bending Stress: Pipe connections meet
EN161, Group 2, UL 429, and ANSI Z21.21 requirements.
Valve Classification: Class A + A, per EN 126/EN 161.
Electrical Equipment: Dc coils with combined rectifier inside
the cover.
Electrical Connection: Standard DIN plug connector with 36
in. (914 mm) leadwires, included.
Model Number
Pipe Size (in.
NPT, Nominal)
Voltage Rating
(Vac, 50/60 Hz)
Current Rating in Amperes (A)
Capacity (cfh)a
V1 V2 V1 + V2
V4730B1008 1/2 120, +10%, -15%. 0.16 0.16 0.32 185
V4730B1016 3/4 275
V4730B1024 1 0.25 0.25 0.50 425
V4730B1032 1-1/4 465
V8730B1009 1/2 24, +10%, -15%. 0.78 0.78 1.56 185
V8730B1017 3/4 275
V8730B1025 1 0.86 0.86 1.72 425
V8730B1033 1-1/4 465
V4750B1003 1/2 120, +10%, -15%. 0.16 0.16 0.32 185
V4750B1011 3/4 275
V4750B1029 1 0.25 0.25 0.50 425
V4750B1037 1-1/4 465
V8750B1004 1/2 24, +10% -15%. 0.78 0.78 1.56 185
V8750B1012 3/4 275
V8750B1020 1 0.86 0.86 1.72 425
V8750B1038 1-1/4 465

V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES
3 65-0275—2
Valve Position Indicator Lamps:
Inboard (closest to the valve body)—V1.
Outboard—V2.
NOTE: If the inboard lamp is lighted, V1 is open; if both
lamps are lighted, the valve is completely open.
When both lamps are unlighted, the valves are
closed.
Ambient Temperature Range: 5°F to 140°F (-15°C to
+60°C).
Coil Insulation Solenoid Valves: Class H insulation system.
Enclosure: IP 54 (NEMA 2).
Body Material: Aluminum alloy, die cast.
Filter: 0.0135 in. (0.34 mm) diameter), AISI 303 steel,
serviceable after removing inlet flange screws. Meets EN 161
requirements for strainers.
Opening Time:
Dead time maximum: 1 second.
First valve opening: < 1 second.
Second valve opening:
< 1 second (V4730B/V8730B)
Adjustable 1 - 90 seconds (V4750B/V8750B).
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.
Operational Voltage Range: The combination gas valve will
function satisfactorily between 85% and 110% of the rated
voltage.
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: Certificate No. 1227192.
Underwriters Laboratories, Inc. (UL): MH18476.
Accessories:
FL0Z0008 Mesh Screen.
COA20001 DIN Connector/36 in. (914 mm) cable assembly.
Flange Kit:
Consists of one flange with sealing plug, 1 O-ring, and four
screws. See Table 2.
Table 2. Flange Kits.
Fig. 1. Approximate dimensions of V4730B/V8730B
(1/2 in. and 3/4 in. pipe size) in in. (mm).
Fig. 2. Approximate dimensions of V4730B/V8730B
(1 in. and 1-1/4 in. pipe size) in in. (mm).
Part No. Size NPT in inches
32006652-001 1/2
32006652-002 3/4
32006652-003 1
32006652-004 1-1/4
M20907
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)
OPTIONAL
PRESSURE
SWITCH
VALVE
POSITION
INDICATOR
LAMPS
M20908
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
VALVE
POSITION
INDICATOR
LAMPS

V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES
65-0275—2 4
Fig. 3. Approximate dimensions of V4750B/V8750B
(1/2 in. and 3/4 in. pipe size) in in. (mm).
Fig. 4. Approximate dimensions of V4750B/V8750B
(1 in. and 1-1/4 in. pipe size) in in. (mm).
Capacity
Fig. 5 through 8 illustrate the capacity for the four valve sizes.
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 up to 90 degrees maximum in
any direction from the normal upright mounting position.
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. 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-rings.
7. Using general purpose lithium grease, grease the
O-rings.
8. Install O-rings into O-ring grooves provided on valve
bodies (one O-ring per groove).
9. Mount the gas valve between the flanges, using the
screws for each flange.
10. Complete the electrical connections as instructed in the
Electrical Connection section.
M20909
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)
VALVE
POSITION
INDICATOR
LAMPS
M20910
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)
VALVE
POSITION
INDICATOR
LAMPS

V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES
5 65-0275—2
Fig. 5. Capacity of V4730B/V8730B; V4750B/V8750B 1/2 in. valves.
Fig. 6. Capacity of V4730B/V8730B; V4750B/V8750B 3/4 in. valves.
100
CFH NATURAL GAS
PRESSURE
DROP
INCHES
W.C.
M20705A
10 50 1000500 100005000
0.1
1
10
100
100
CFH NATURAL GAS
PRESSURE
DROP
INCHES
W.C.
M20706A
10 50 1000500 100005000
0.1
1
10
100

V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES
65-0275—2 6
Fig. 7. Capacity of V4730B/V8730B; V4750B/V8750B 1-in. valves.
Fig. 8. Capacity of V4730B/V8730B; V4750B/V8750B. 1-1/4 in. valves.
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.
100
CFH NATURAL GAS
PRESSURE
DROP
INCHES
W.C.
M20707A
10 50 1000500 100005000
0.1
1
10
100
100
CFH NATURAL GAS
PRESSURE
DROP
INCHES
W.C.
M20708A
10 50 1000500 100005000
0.1
1
10
100

V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES
7 65-0275—2
Wiring
1. Use 14, 16 or 18 AWG copper conductor, 600 volt
insulation, moisture-resistant wire for line voltage
connections. Recommended wire types are TTW60C,
THW75C or THHN90C.
2. Follow the instructions below for wiring the gas valve.
See Fig. 9 and 10 for reference.
a. T1 (yellow) will be L2 (120 Vac or 24 Vac).
b. T2 (black) will be L1 (120 vac or 24 Vac) to Valve 1.
c. T3 (blue) will be L1 (120 Vac or 24 Vac) to Valve 2.
d. Ground (green) will be earth ground.
.
Fig. 9. Four-pin electrical plug connector.
Fig. 10. 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. 11)
The V4730B/V8730B, V4750B/V8750B, have a number of
connection points (1/8 in. [3 mm] NPT plugs) for measuring
pressure and/or mounting a pressure switch. The pressure tap
points are:
1Inlet pressure at first SSOV flange tap.
2Inlet pressure at first SSOV.
POutlet pressure at first SSOV.
3Inlet pressure at second SSOV.
4Outlet pressure at second SSOV flange tap.
The following pressures can be measured:
1. Inlet pressure—tap on inlet flange (1).
2. Pressure after inlet screen (2).
3. Unregulated intermediate pressure—pressure between
the two shutoff seats (P).
4. Regulated intermediate pressure—pressure between
the two shutoff valves (3).
5. Outlet pressure—tap from flange (4).
The corresponding numbers (2,P, 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. The pressure switch can be mounted to 2, P
or 3on either side of the valve body.
Fig. 11. Pressure tap points.
Second Valve, Fast Opening
(V4730B/V8730B)
Flow rate is adjustable from 0% to 100% of full rated flow. To
adjust the flow rate:
1. Remove the flat, round, blue plastic 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 flat, round, blue plastic cap back on the cover.
V1
(BLACK) 21
3
L2
M20583
(YELLOW)
(GREEN)
V2
(BLUE)
1
1FOR CONNECTION TO 1/2 INCH FLEXIBLE ELECTRICAL
CONDUIT ONLY. MAXIMUM TORQUE 65 INCH-POUNDS.
V1
1
3
V2
M20584
2
BLACK BLUE
YELLOW
4
1
23
3
2
M17985C
OPTIONAL
C6097
PRESSURE
SWITCH
P
P

V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES
65-0275—2 8
Second Valve, Slow Opening
(V4750B/V8750B)
The flow rate, opening speed, 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.
Flow rate is adjustable from 0% to 100% of full rated flow. To
adjust the flow rate (Fig. 12 and 13):
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. 12. Removing the cap.
Fig. 13. Turning the flow rate adjustment nut.
NOTE: Step pressure is adjustable from 0 to 90% of setpoint
pressure.
To adjust the step pressure (FIg. 12 and 14):
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.
Opening Speed Adjustment
(V4750B/V8750B)
Opening speed can be adjusted between one second
minimum and 90 seconds maximum. See Fig. 15 and 16.
Fig. 14. Turning the step pressure adjustment screw.
Fig. 15. Opening speed adjustment screw.
M17979
A
M17980A
M17981
A
M17982B
SLOWER
OPENING
FASTER
OPENING

V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES
9 65-0275—2
Fig. 16. Characterized opening.
Pressure Regulator
Pressure regulation is adjustable from 1.2 in. to 15 in. wc.
1. Remove cap from regulator.
2. Turn adjusting screw clockwise to increase the
output pressure or counterclockwise to decrease
the pressure.
3. Replace the regulator cover cap.
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 V4730B/V8730B, V4750B/V8750B 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.
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.
WARNING
Electrical Shock Hazard.
Can cause serious injury, death or equipment
damage.
Remove the power from the system before beginning
the valve leak test. More than one disconnect may be
involved.
1. De-energize the control system to make sure no power
goes to the valves.
2. Close the upstream manual gas cock (A).
3. Make sure the manual test petcock (F) is closed in the
leak test tap assembly
4. To test the first SSOV, remove the 1/8 in. (3 mm) NPT
plug from pressure tap point P.
5. Install the leak test tap into pressure tap point Pon the
valve body.
6. Open the upstream manual gas cock (A) to repressurize
the first SSOV.
7. Immerse the 1/4 in. (6 mm) tube vertically 1/2 in.
(13 mm) into a jar of water.
8. Slowly open the manual test petcock (F).
9. 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). See Table 3.
Table 3. Maximum Bubbles per Pipe Size.
10. Close the upstream manual gas cock (A).
11. Remove the leak test tap from the valve body.
12. Using a small amount of pipe sealant on the 1/8 in.
(3 mm) NPT plug, reinstall the plug in pressure tap
point P.
13. To test the second SSOV, remove the 1/8 in. (3mm)
NPT plug from the flange pressure tap point 4.
14. Install the leak test tap into pressure tap point 4.
15. Close the downstream manual gas cock E.
16. Immerse the 1/4 in. (6 mm) tube vertically 1/2 in.
(13 mm) into a jar of water.
17. Slowly open the manual test petcock (F).
18. 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.
FLOW REGULATION
OPENING SPEED REGULATION
TIME
STEP
PRESSURE
M17983C
OUTLET PRESSURE
100% FLOW
0% FLOW
Pipe Size (in.
NPT)
Maximum Seat
Leakage (UL)
Maximum Number
of Bubbles/10
seconds
1/2-3/4 235 cch 6
1 275 cch 7
1-1/4 340 cch 8

V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES
65-0275—2 10
19. Remove the leak test tap from the valve body.
20. Using a small amount of pipe sealant on the 1/8 in.
(3 mm) NPT plug, reinstall the plug in pressure tap
point 4.
After the Test
1. Make sure the downstream manual gas cock (E) is
closed.
2. Open the upstream manual gas cock (A) and energize
the valve through the safety system.
3. 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.
4. De-energize the valve C.
5. Open the downstream manual gas cock (E).
6. Restore the system to normal operation.
Fig. 17. Valve leak test.
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.
5. If the valve still does not close, replace the valve.
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.
Screen/Strainer Replacement
1. Make sure that the gas supply is turned off and all
electrical power has been removed.
2. Remove bolts from flange/valve.
3. Remove valve from gas supply line.
4. Remove old screen/strainer.
5. Clean the strainer by using compressed air or replace
the strainer.
6. Install the cleaned strainer or the new strainer.
7. Make sure O-ring sealing surface is clean on flange.
8. Using general purpose lithium grease, grease the
O-ring.
M20911
GAS
SUPPLY
UPSTREAM
MANUAL
GAS COCK
DOWNSTREAM
MANUAL
GAS COCK
BURNER
D
LEAK
TEST
TAP
AB C E
F
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.
1
2
3
4
4
2
3
1
1
2(13 MM)
SSOV
C

V4730B/V8730B, V4750B/V8750B CLASS A DOUBLE BLOCK AND PRESSURE REGULATING SAFETY SHUTOFF VALVES
11 65-0275—2
9. Install O-rings into O-ring grooves provided on valve
body (one O-ring per groove).
10. Mount the gas valve between the flanges, using the
screws for each flange.
11. Apply power.
12. Turn on the main gas supply.
13. Complete the valve leak test.
14. Return the valve to service.

65-0275—2 G.R. Rev. 11-04 www.honeywell.com
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