VS8420E2087 | Honeywell Millivolt Gas Valve Replacement for Lennox 82L86
Honeywell · Valves & Process Control
Description The Honeywell VS8420E2087 is a millivolt-operated gas control valve designed as a direct replacement for select Lennox systems (including part reference 82L86). It provides reliable safety shut-off and gas regulation for pilot-ignited heating appliances. Engineered for residential furnaces and fireplaces, the valve delivers controlled fuel flow and manual/automatic operation for efficient performance. Technical Specifications Condition New/Never Used Surplus Brand Honeywell Category HVAC Controls Part Number VS8420E2087 Subcategory Millivolt Gas Valve Valve Type Combination gas control with manual and automatic operation System Type Millivolt (thermocouple/thermopile) pilot systems Gas Type Natural Gas / LP (convertible) Regulator Setting NAT: 3–5 in. W.C.; LP: 8–12 in. W.C. Control Positions OFF / PILOT / ON Pressure Regulation Adjustable internal regulator Electrical Requirements None (self-powered millivolt) Inlet/Outlet Connection Standard 3/8″ NPT (typical for this series) Maximum Capacity Up to 60,000 BTU/h (approximate typical value) Ambient Temperature Range 0 °F to +175 °F (–18 °C to +79 °C) Compatible Models Replaces Lennox 82L86 and equivalent valves Mounting Orientation Horizontal, upright position recommended Safety Features Automatic flame failure shutoff Weight ~4 lbs Information About VS8420E2087 The VS8420E2087 belongs to the Honeywell VS8420E series of millivolt combination gas valves, which integrate manual control knob, regulator and internal safety shut-off functions. These valves work without external electrical power, using a thermopile/thermocouple system to sense pilot flame and permit main burner operation. The “E” suffix denotes a version with high/low pressure regulator, convertible between natural gas and LP with proper conversion kit. Although discontinued by Honeywell, this valve is still used in legacy Lennox models, offering backward-compatible replacement for previously installed valves with part number 82L86 or equivalent. The unit supports proper installation with sediment trap, correct gas flow direction, and compliance with national fuel gas codes. Key Features: Millivolt Operation: Works with thermopile/thermocouple pilot systems for valve actuation without external 24 V power. Convertible Regulator: High/low regulator version allows field selection for Natural Gas or LP with conversion cap. Manual Control Knob: Provides OFF, PILOT and ON positions for safe start-up and shutdown. Adjustable Pressure Regulation: Natural gas setting approx. 3”–5” wc, LP setting approx. 8”–12” wc (varies by model). Thermopile/TC Compatibility: Designed for self-generating pilot systems with minimum required mV output. Legacy System Support: Direct replacement for Lennox 82L86 and other VS8420E versions, simplifying retrofits. Compact Millivolt Valve Design: Suitable for small-to-mid-BTU space-heating and furnace applications (up to ~60,000 BTU/h in many VS8420 models). Service-Friendly Mounting: Straight-through flow, standard inlet/outlet threads, allows quick swap in field. Safety Certified: Meets safety shut-off requirements for pilot flame failure and pressure regulation as described in official documentation. Discontinued but Serviceable: Though marked “OBSOLETE” in manufacturer literature, many HVAC parts suppliers still stock or support replacement. The VS8420E2087 delivers the reliability and precision required for safe and efficient valve control in legacy residential heating systems.
Brand: Honeywell · Category: Valves & Process Control
Key features
- Millivolt Operation: Works with thermopile/thermocouple pilot systems for valve actuation without external 24 V power.
- Convertible Regulator: High/low regulator version allows field selection for Natural Gas or LP with conversion cap.
- Manual Control Knob: Provides OFF, PILOT and ON positions for safe start-up and shutdown.
- Adjustable Pressure Regulation: Natural gas setting approx. 3”–5” wc, LP setting approx. 8”–12” wc (varies by model).
- Thermopile/TC Compatibility: Designed for self-generating pilot systems with minimum required mV output.
- Legacy System Support: Direct replacement for Lennox 82L86 and other VS8420E versions, simplifying retrofits.
- Compact Millivolt Valve Design: Suitable for small-to-mid-BTU space-heating and furnace applications (up to ~60,000 BTU/h in many VS8420 models).
- Service-Friendly Mounting: Straight-through flow, standard inlet/outlet threads, allows quick swap in field.
- Safety Certified: Meets safety shut-off requirements for pilot flame failure and pressure regulation as described in official documentation.
- Discontinued but Serviceable: Though marked “OBSOLETE” in manufacturer literature, many HVAC parts suppliers still stock or support replacement.
Specifications
| Manufacturer part number | VS8420E2087 |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Honeywell |
| Category | HVAC Controls |
| Part Number | VS8420E2087 |
| Subcategory | Millivolt Gas Valve |
| Valve Type | Combination gas control with manual and automatic operation |
| System Type | Millivolt (thermocouple/thermopile) pilot systems |
| Gas Type | Natural Gas / LP (convertible) |
| Regulator Setting | NAT: 3–5 in. W.C.; LP: 8–12 in. W.C. |
| Control Positions | OFF / PILOT / ON |
| Pressure Regulation | Adjustable internal regulator |
| Electrical Requirements | None (self-powered millivolt) |
| Inlet/Outlet Connection | Standard 3/8″ NPT (typical for this series) |
| Maximum Capacity | Up to 60,000 BTU/h (approximate typical value) |
| Ambient Temperature Range | 0 °F to +175 °F (–18 °C to +79 °C) |
| Compatible Models | Replaces Lennox 82L86 and equivalent valves |
| Mounting Orientation | Horizontal, upright position recommended |
| Safety Features | Automatic flame failure shutoff |
| Weight | ~4 lbs |
| Product type | Millivolt Gas Valve |
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