Table of Contents
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Note: Photo shows valve with manual safety shutoff valve and
venturi installed.
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.
V4730C/V8730C/V4734C
1:1 Gas/Air Servo Regulated Gas Valves
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
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
Product data
EN2R-9074 0612R1-NE
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Table of Contents
Related Manuals for Honeywell V4730C
Summary of Contents for Honeywell V4730C
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Page 1: Table Of Contents
APPLICATION FEATURES The V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas • Wide modulation range (14% to 100% of burner load). Valves, with the addition of the Venturi Mixing Unit (VMU) and dc • 24 Vac and 120 Vac models. -
Page 2: Specifications
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves SPECIFICATIONS The specifications in this section are related to the Venturi Mixing Unit (VMU) and Combination Gas Valve. Models: See Table 1 Table 1: Model Information Model Number Size (in.) Voltage/Frequency V1 + V2 Total Current Capacity (Natural Gas 0.64sp.gr) -
Page 3: Ordering Information
32006653-001 Venturi O-rings/screws. write or phone: Operational Voltage Range: 1. Your local Honeywell Automation and Control Products Sales The combination gas valve will function satisfactorily between Office (check white pages of your phone directory). 85% and 110% of the rated voltage. - Page 4 V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves 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).
- Page 5 V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves 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). EN2R-9074 0612R1-NE...
- Page 6 V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves 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)
- Page 7 V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves Fig. 6: Venturi 500kW, with V4730 gas vlave and valve shutoff kit installed, dimensions in in. (mm), part 1. EN2R-9074 0612R1-NE...
- Page 8 V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves Fig. 7: Venturi, 500 kW, with V4730 gas valve and valve shutoff kit installed, dimensions in in. (mm), part 2 EN2R-9074 0612R1-NE...
- Page 9 V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves Fig. 8: V4734 + VMU 500/680 EN2R-9074 0612R1-NE...
- Page 10 V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves 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 EN2R-9074 0612R1-NE...
- Page 11 V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves Fig. 11: Capacity curves for V4730C/V8730C and VMU 300 Venturi, 1 in. size. Fig. 12: Capacity curves for V4730C/V8730C and VMU 335 Venturi, 1-1/4 in. size. EN2R-9074 0612R1-NE...
- Page 12 V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves Fig. 13: Capacity curves for V4730C/V8730C and VMU 500 Venturi, 1-1/4 in. size. Fig. 14: Capacity curves for V4734C/V8734C and VMU 680 Venturi, 1-1/4 in. size. EN2R-9074 0612R1-NE...
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Page 13: Installation
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves INSTALLATION When Installing This Product... Mounting Locations 1. Read these instructions carefully. Failure to follow them could The distance between the gas valve and the wall/ground must be damage the product or cause a hazardous condition. -
Page 14: Electrical Connections
Pressure Tap Points (Fig. 18) The V4730C/V8730C/V4734C Valves have a number of connec- tion points (1/8 in. [3 mm] NPT plugs) for measuring pressure and/or mounting a pressure switch. The pressure tap points are: 1 inlet pressure at first SSOV flange tap. -
Page 15: Operation
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves OPERATION The V4730C/V8730C/V4734C are normally closed valves. The 13. To test the second SSOV, remove the 1/8 in. (3 mm) NPT plug from the flange pressure tap point 4. valves open when energized and close when power is removed. -
Page 16: Troubleshooting
V4730C/V8730C/V4734C 1:1 Gas/Air Servo Regulated Gas Valves TROUBLESHOOTING 3. If there is still no voltage at the valve leadwires or terminal WARNING block, make sure all appropriate contacts in the thermostat Electrical Shock Hazard. Can cause severe inju- or controller, limits and flame safeguard control are closed. If ry, death or property damage.