Honeywell V4730C User manual
Product data
EN2R-9074 0612R1-NE
V4730C/V8730C/V4734C
1:1 Gas/Air Servo Regulated Gas Valves
Note: Photo shows valve with manual safety shutoff valve and
venturi installed.
CONTENTS
Application ..........................................................1
Features ..............................................................1
Specifications ......................................................2
Ordering Information.............................................3
Installation ..........................................................13
Electrical Connections ........................................14
Adjustments and Final Checkout ........................14
Operation ...........................................................15
Troubleshooting..................................................16
Service Information ............................................16
APPLICATION
The V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas
Valves, with the addition of the Venturi Mixing Unit (VMU) and dc
fan, are used for modulating premix appliances such as gas bur-
ners, gas boilers, rooftop units, makeup air units and process ap-
plications.
FEATURES
• Wide modulation range (14% to 100% of burner load).
• 24 Vac and 120 Vac models.
• Main valve body with two shutoff seats (double block valve).
• Closing time less than one second.
• Mesh screen (strainer) between inlet flange and main body.
• Various pressure tap points available at main body when no
additional valves or pressure switches are used.
• DIN 43650 Plug Connector with 36-in. (914 mm) leadwires
included.
• Flexible mounting positions of venturi manifold to fan.
• Replaceable pipe flange adapters available.
• Position indication lamp for each valve stage
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves
2 EN2R-9074 0612R1-NE
SPECIFICATIONS
The specifications in this section are related to the Venturi
Mixing Unit (VMU) and Combination Gas Valve.
Models: See Table 1
aWhen used with VMU335 Venturi UnitAnwendung
Table 1: Model Information
Model Number Size (in.) Voltage/Frequency V1 + V2 Total Current Capacity (Natural Gas 0.64sp.gr)
V4730C1006 1/2 120 Vac, 50/60 Hz 0.32 A 22-150 kW (73-512 kBtuh)
V4730C1014 3/4 43-300 kW (146-1024 kBtuh)
V4730C1022 1 0.5 A
V4730C1030 1-1/4 55-382 kW (185-1300 kBtuh)a/71 -
500 kW (245-1710 kBtuh)
V4734C1002 1-1/4 120 Vac, 50/60 Hz 2.6 A at start
1.04 A during operation
97-680 kW (326-2287 kButh)
when used with VMU680 unit
V8730C1007 1/2 24 Vac, 50/60 Hz 1.56 A 22-150 kW (73-512 kBtuh)
V8730C1015 3/4 43-300 kW (146-1024 kBtuh)
V8730C1023 1 1.72 A
V8730C1031 1-1/4 55-382 KW (185-1300 kBtuh)a/71 -
500 KW (245-1710 kBtuh)
Maximum Operating Pressure (UL):
1.45 psi (100 mBar), except for 1-1/4 in. size:
(24V): 1 psi (70 mBar).
(120V): 1.45 psi (100mBar)
CSA Approved: 0.5 psi (34 mBar).
Note: CSA Certification to 1/2 psi.
Connections:
1/8 in. (3 mm) NPT pressure taps at inlet and outlet flanges. Eight
flange connections are provided at the main body to mount either
a pressure switch (high or low) or a ValveProving System (VPS).
Torsion and Bending Stress:
Pipe connections meet EN151, Group 2, requirements.
Electrical Equipment:
Standard DIN plug connector with 36-in. (914 mm) leadwires.
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).
Coil Insulation Solenoid Valves:
Class H insulation system.
Body Material:
Aluminum alloy, die-cast
Strainer:
Fine mesh screen (0.135 in. [0.34 mm] diameter). AISI 303 steel,
serviceable after removing inlet flange screws. Meets EN161 re-
quirements for strainers
Seals and Gaskets:
Hydrocarbon-resistant NBR and Viton rubber types.
Flange Kit:
Consists of one flange with sealing plug, one O-ring and four
screws. See Table 2.
Note: Valve comes with one kit only.
Manual Shut-Off Valve Kits:
50002653-001 for use with 1 in. NPT or smaller valves.
50002653-002 for use with 1-1/4 in. NPT valves.
Table 2: Flange Kits.
Part Number Size NPT in in. (mm)
32006652-001 1/2 (13)
32006652-002 3/4 (19)
32006652-003 1 (25)
32006652-004 1-1/4 (32)
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves
EN2R-9074 0612R1-NE 3
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 informati-
on, 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, Ger-
many, Japan, Mexico, Netherlands, Spain, Taiwan, United King-
dom, U.S.A.
Opening Time:
Dead time maximum: 1 second.
First valve opening: less than 1 second.
Second valve opening: reaches 50% of the adjustable outlet
pressure within 5 seconds.
Maximum Allowable Leakage:
Outerwall: 3 cu. in./hr (50 cm3/h) at test pressure of 0.87 psi
(6 mBar) and 7.83 psi (540 mBar).
First Valve: 2.5 cu. in./hr (40 cm3/h) at test pressure of 0.87 psi
(6 mBar) and 7.83 psi (540 mBar).
Second Valve: 2.4 cu. in./hr (40 cm3/h) at test pressure of
0.87 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.
Accessories:
FL020008 Mesh Screen.
Flange Kits (see Table 2).
DIN43650 Connector
32006653-001 Venturi O-rings/screws.
Operational Voltage Range:
The combination gas valve will function satisfactorily between
85% and 110% of the rated voltage.
Gas Valve Connection to Venturi (Field-Assembled):
Four screws and an O-ring are used to connect the gas valve to
the venturi/manual shutoff valve.
The metal tube provided with the venturi must be connected bet-
ween the venturi and the gas valve regulator.
Fan Connection:
The venturi is connected to the fan using six bolts (wich are inclu-
ded with VMU).
Minimum Load:
The minimum load for which the system can be used is
14-17% of the reference load, which equals a minimum
pressure differential of 0.2 in. wc (50 Pa) of the 1:1
venturi/servo regulator gas control.
Approvals:
Gas Appliance Directive 90.396/EEC
ANSI: Z21.21
CSA: 6.5
Capacity Curves:
See Fig. 9 to 14.
Dimensions:
See Fig. 1 to 5
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves
4 EN2R-9074 0612R1-NE
Fig. 1: V4730C/V8730C Gas Valves, 1/2 in. (13 mm) and 3/4 in. (19 mm) size, dimensions in in. (mm).
Fig. 2: V4730C/V8730C Gas Valves, 1 in. (25 mm) size, dimensions in in. (mm).
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves
EN2R-9074 0612R1-NE 5
Fig. 3: V4730C/V8730C Gas Valves, 1-1/4 in. (32mm) size, dimensions in in. (mm).
Fig. 4: V4734C Gas Valves 1-1/4 in. (32mm) size, dimensions in in. (mm).
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves
6 EN2R-9074 0612R1-NE
Fig. 5: Venturi 150-335 kW, with 1/2 in. to 1 in. gas valves and valve shutoff kit installed dimensions in in. (mm). See Table 3 for
dimensions
Table 3: Dimensions in inches (millimeters)
Valve Size in inches A B C D
1/2, 3/4 6 - 1/4 (159) 15 - 15/16 (405) 2 - 15/16 (75) 7 -7 1/2 (191)
18 - 5/16 (211)
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves
EN2R-9074 0612R1-NE 7
Fig. 6: Venturi 500kW, with V4730 gas vlave and valve shutoff kit installed, dimensions in in. (mm), part 1.
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves
8 EN2R-9074 0612R1-NE
Fig. 7: Venturi, 500 kW, with V4730 gas valve and valve shutoff kit installed, dimensions in in. (mm), part 2
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves
EN2R-9074 0612R1-NE 9
Fig. 8: V4734 + VMU 500/680
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves
10 EN2R-9074 0612R1-NE
Fig. 9: Capacity curves for V4730C/V8730C and VMU 150 Venturi, 1/2 in. size.
Fig. 10: Capacity curves for V4730C/V8730C and VMU 300 Venturi, 3/4 in. size
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