Honeywell, VR8300A4508/U, Single Stage, 3/4 in, 0.5 psi

Honeywell VR8300A4508/U Standing Pilot Gas Valve – 3/4" NPT, 24V Combination Control

The Honeywell VR8300A4508/U is a single-stage combination gas valve designed for use in 24 VAC gas-fired heating appliances with standing pilot systems. This model features dual automatic operators, a manual shutoff, integral pressure regulation, and a straight-through body configuration with flange connections.

Suitable for natural gas systems, the VR8300A includes components for conversion to LP. With a nominal capacity range of 30,000 to 300,000 BTU/hr, this valve supports a wide range of residential and light commercial heating applications. All wiring terminals and adjustment points are accessible from the top for simplified service and installation.

Functional Overview

• Gas Type: Factory-set for natural gas; convertible to LP using included kit
• Ignition Type: Compatible with standing pilot ignition systems
• Control Voltage: 24 VAC, 60 Hz
• Safety Shutoff: Dual automatic valves for redundant control
• Pressure Regulation: Built-in regulator set to 3.5 in. W.C. (natural gas)

Technical Specifications

• Model: VR8300A4508/U
• Nominal Capacity: 30,000 – 300,000 BTU/hr
• Inlet/Outlet Size: 3/4 in NPT
• Max Inlet Pressure: 0.5 psi (14.0 in. W.C.)
• Temperature Range: 0°F to 175°F (-18°C to 79°C)
• Body Pattern: Straight-through with flange
• Electrical Connection: 1/4 in male quick-connect terminals
• Dimensions: 5-3/8 in H × 4-1/16 in W × 2-11/16 in D

Included Components

• Natural to LP gas conversion kit

Installation Requirements

This valve is intended for upright mounting in appliances with pilot systems. The installer must perform leak tests, verify pressure settings, and ensure all electrical and gas connections comply with code. This product should be installed and adjusted by licensed HVAC or gas service professionals only.

Applications

• Residential gas furnaces
• Boilers and unit heaters
• Other standing pilot-based gas-fired heating equipment

Additional Notes

The VR8300A4508/U includes dual safety shutoff features required by many codes and appliance standards. All control adjustments and pilot tubing connections are accessible from the top for streamlined service.