Resideo VR8345Q4563/U 3/4 in x 3/4 in Universal 24 Vac Standard Opening Ignition Gas Valve

Item #: HONE-VR8345Q4563/U
Mfr. part #: VR8345Q4563/U
UPC: 085267797306

Key specifications

FuelNatural (LP kit incl.)
IgnitionDirect / interm. pilot
StagesTwo stage
Coil voltage24 Vac
Inlet x Outlet3/4 x 3/4 in

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$218.79

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Shipping details

Shipping weight: 2.6 lb
Box size: 6.55 × 5.55 × 3.6 in

Installation by a licensed gas technician is required. Confirm the part against your appliance's parts list.

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Brand	Resideo
Manufacturer part #	VR8345Q4563/U
Inlet/Outlet Size	3/4 in. x 3/4 in.
Body Pattern	Straight-through
Capacity (kBtuh)	At 1 in. wc p.d.-- 300,000 BTUh: 30,000 BTUh minimum: 415,000 BTUh maximum Natural Gas
Opening Characteristics	Standard Opening
Voltage	24 Vac
Frequency	50 Hz; 60 Hz
Electrical Connections	1/4 in. quick-connect male terminals
Pressure Rating	1/2 psi
Regulator Setpoint	1.7 in. wc low; 3.5 in. wc high
Pressure Tapping	1/8 in. NPT with plug
Operating Temperature	-40 F to +175 F
Type of Fuel	Natural (LP with included conversion kit)
Ignition Type	Direct Ignition; Intermittent Pilot
Mounting	0 to 90 degrees in any direction from the upright position of the gas control knob, including vertically.
Application	Two Stage
Includes	Two 3/4 x 1/2 in. reducer bushings; Natural to LP Conversion Kit
Dimensions	5 3/8 in. high x 4 1/16 in. wide x 2 11/16 in. deep
CSA	CSA International: 112395
Pilot Gas Outlet	Compression fitting for 1/4 in. OD tubing
Pressure Regulator	Standard
UPC	085267797306

The VR8345Q4563 is a gas control valve from Resideo (Honeywell Home) for universal appliances, 3/4 in x 3/4 in inlet and outlet, 24 Vac coil.

The gas valve is the component that admits fuel to the burner and shuts it off. It carries the main shutoff, the pressure regulator that holds manifold pressure steady as supply pressure varies, and the safety interlock that keeps gas off until the control system has proved it is safe to light.

This is a universal valve, built to serve intermittent pilot and direct ignition systems both. One part number covers applications that would otherwise take two, which is why it is the valve a service truck carries.

The valve is standard opening. A slow-opening valve ramps the burner up over a couple of seconds to soften the light-off; a standard-opening valve goes to full rate at once. Match the opening rate of the valve coming out — this is one of the differences that does not show on the outside of the body.

Gas appliance safety. A gas valve must match the appliance it is fitted to — ignition system, capacity, inlet pressure and gas type. Replacement is work for a licensed gas technician, and the appliance manufacturer's parts list is what decides the correct valve, not the physical fit of the threads. If the replacement does not match, the appliance can fail to light, fail to prove flame, or overfire.