H4173 Gas Valve Sit Control Nova 820 Natural Gas Lennox IHP 903489

The H4173 Lennox IHP Natural gas valve is the model 0820646 SIT-820 NOVA is a natural gas control valve for use in VENT-FREE natural gas appliances, such as fireplaces, stoves, gas logs, and similar hearth appliances with a manually operated HI/LO burner adjustment knob. Durable and reliable, the SIT-820646 NOVA mV natural gas valve is easy to install in a direct vent fireplace.

The valve can be controlled with a millivolt remote control system or wall switch.

Service Notice:

The SIT-820 NOVA mV series of gas valves look very similar in both design and configuration, but there are hundreds of these valves.

It is incredibly important that you only install the exact model of valve or an equivalent authorized replacement as specified by your appliance manufacturer.

Using the exact model valve or a manufacturer-approved replacement will guarantee the continued safe operation of your direct vent appliance.

Gas Valve SIT H4173-0820646 Vent-Free Specifications:

• Thermocouple Connection: M8x1
• Gas Type: Natural Gas
• Natural Gas Inlet: 3/8 in. NPT
• Natural Gas Outlet: 3/8 in. NPT
• Pilot Outlet: 7/16 24 UNS
• Minimum Voltage: 145mV
• Coil Resistance: 2.25 ohms ± 0.5 ohms
• Range of Adjustment: 5.0” w.c. - 3.1” w.c. Set at 30K btu/hr
• Maximum Inlet Pressure: 1/2 PSIG
• Ambient Operating Temperature: 32° to 175° F

Gas Valve SIT-820646 Features:

• Replacement gas valve for certain vent-free appliances
• Used by many manufacturers
• Easy to install and maintain
• Inspected and tested for quality
• SIT Valves are industry standards for reliability
• Can be controlled with a millivolt remote control system
• Built-In HI/LO knob for burner adjustment

For further questions or to verify your application please contact us by email at customerservice@allpartsinc.com or text/call us at 269-447-0412.