Vermont Casting 2825, 820, 2828, 2823, 2827 Troubleshooting / Honeywell #8420 Gas Control System

Page 27

Vermont Castings Jefferson Direct Vent/Natural Vent Gas Heater

Troubleshooting / Honeywell #8420 Gas Control System

NOTE: Before troubleshooting the gas control system, be sure the external gas shutoff is in the ÒONÓ position.

WARNING: REMOVE THE GLASS PANEL BEFORE PERFORMING ANY GAS CONTROL SERVICE WORK.

SYMPTOM

POSSIBLE CAUSES

CORRECTIVE ACTION

1.

Spark ignitor will

A. Defective or misaligned

Using a match, light pilot. If pilot lights, turn off pilot and

 

not light

electrode at the pilot

push the ignitor button again. If pilot will not light, check

 

 

 

gap at electrode and pilot - it should be 1/8Ó to have a

 

 

 

strong spark.

 

 

 

 

 

 

 

B. Defective ignitor (push

Push piezo ignitor button. Check for spark at electrode

 

 

button)

and pilot. If there is no spark at the pilot, and electrode

 

 

 

wire is properly connected, replace ignitor.

 

 

 

 

 

2.

Pilot will not stay lit

A. Defective pilot generator

Check pilot flame. It must impinge on the thermocouple

 

after carefully

(thermocouple)

or thermopile. NOTE: This pilot burner assembly uses

 

following the

 

both a thermocouple and a thermopile. The thermo-

 

lighting instructions

 

couple operates the pilot flame. Tighten the thermo-

 

 

 

couple. The thermopile operates the main valve (ON and

 

 

 

OFF). Clean and/or adjust pilot for maximum flame

 

 

 

impingement on thermocouple and thermopile.

 

 

 

 

 

 

 

B. Defective automatic valve

Turn valve knob to ÔPilotÕ. Maintain flow to pilot; millivolt

 

 

operator

meter should read greater than 10mV. If the reading is

 

 

 

okay and the pilot does not stay on, replace the gas

 

 

 

valve. NOTE: An interrupter block (not supplied) must be

 

 

 

used to conduct this test.

 

 

 

 

 

 

 

A. Remote switch or wires

Check rocker switch and wires for proper connection.

3.

Pilot lights, no gas

defective

Use jumper wires across terminals at rocker switch. If

 

to burner, valve

 

burner lights, replace rocker switch. If okay, use jumper

 

knob ON, remote

 

wires across rocker switch wires at the valve; if burner

 

switch (rocker

 

lights, wires are faulty or connections are bad.

 

switch) ON

 

 

 

 

B. Thermopile may not gener-

1. Be sure wire connections from thermopile at gas valve

 

 

 

 

ate sufficient voltage

terminals are tight and thermopile is fully inserted into

 

 

 

pilot bracket.

 

 

 

 

 

 

 

 

2. One of the rocker switch wires may be grounded.

 

 

 

Remove rocker switch wires from valve terminals. If

 

 

 

burner now stays lit, trace rocker switch wiring from

 

 

 

ground. It may be grounded to the appliance or the

 

 

 

gas supply line.

 

 

 

 

 

 

 

 

3. Check the thermopile with a millivolt meter. Take

 

 

 

reading at thermopile (ÒTPÓ and ÒTP/THÓ) terminals of

 

 

 

gas valve. Should read 325 millivolts minimum while

 

 

 

holding valve knob depressed in PILOT position and

 

 

 

with rocker switch OFF. Replace faulty thermopile if

 

 

 

reading is below specified minimum.

 

 

 

 

 

 

C. Plugged burner orifice

Check burner orifices for debris, and remove.

 

 

D. Defective automatic valve

Turn knob to ON, place rocker switch to ON, millivolt

 

 

operator

meter should read greater than 10 mV. If the reading is

 

 

 

okay and the burner does not light, replace the valve.

 

 

 

 

4. Frequent pilot

A. Pilot flame may be too low

Clean and/or adjust pilot flame for maximum flame

 

outage

or high, (blowing or lifting),

impingement on thermocouple and thermopile.

 

 

causing the pilot to drop out

 

 

 

 

B. Possible blockage of the

Check the vent terminal for blockage.

 

 

vent terminal

 

 

20002191

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Contents Jefferson Table Of Contents Installation & Operating Instructions Jefferson dimensions Jefferson Direct Vent/ Natural Vent Stove DimensionsInstallation Requirements Locating the StoveClearance Requirements Hearth Requirements Wall Thimble Centerline from FloorHigh Elevations Gas SpecificationsGas Inlet and Manifold Pressures Horizontal Termination Direct Vent onlyPlate Restictor Plate is used on Direct Vent installations onlyLocation of Vent Termination Vent Termination Clearances Direct Vent onlyGeneral Venting Information Termination Location Canadian Installations US InstallationsVenting Requirements Natural Vent Only Horizontal Run in feetSupplied with the stove is not used Minimum Horizontal Vent Kit 2792 Venting Requirements and Options Direct Vent onlyUnpack the Stove Assembly ProceduresInstall the Optional Fan Tools RequiredInstall the Vent Adapter Pipe Venting System Assembly Direct Vent General InformationDiscard the inner starter pipe shipped with Install the Restrictor Plate. Consult the ÔVent RunInstall the Outer Adapter Pipe. Apply a 1/4Ó bead Simpson Dura-Vent ComponentsSimpson Dura-Vent install outer adapter pipe Side Wall Termination AssemblyMeasure the horizontal length Vent Termination Below GradeSnorkel kit installation Vertical Through the Roof Vent AssemblyInstall the Vent Pipe Venting System Assembly Natural Vent General InformationAged Logs Install the Log SetBurner Information Air Shutter AdjustmentAir Shutter Adjustment Instructions Connect the Gas Supply LineRemove stove front Install the Stove Front Complete the AssemblyInstall ON/OFF Switch Thermostat This completes assembly of the Jefferson stoveThermostat Connection optional Use only a thermostat rated for 500 millivoltsYour First Fire Flame & Temperature AdjustmentFlame Characteristics OperationTo Turn Off Gas To Heater Lighting And Operating InstructionsSymptom Possible Causes Corrective Action Troubleshooting / Honeywell #8420 Gas Control SystemPilot Type Conversion PrecautionsConversion Procedure Fuel Conversion InstructionsConversion to LP Input BTU/h Conversion to Natural Gas Input BTU/hMaintenance Check the Gas Flame Regularly Gasket ReplacementStove Disassembly Inspect the Vent System AnnuallyBLK Wiring DiagramsDescription Jefferson Direct Vent/Natural Vent Gas HeaterFuel Conversion Kits Shell Enamel Part Numbers Model ColorLeft Right Front Number End Decorative Rings Optional AccessoriesRemote Controls Fan KitsLimited Lifetime Warranty

2823, 2825, 820, 2827, 2828 specifications

Vermont Casting stoves are renowned for their quality and performance, with models such as the 2823, 2822, 2828, 820, and 2825 exemplifying the brand’s dedication to craftsmanship and innovation. Each model presents unique features and technologies that cater to different heating needs and preferences.

The 2823 model is a testament to Vermont Casting's commitment to efficiency and style. It boasts a clean-burning gas system that maximizes heat output while minimizing emissions. Additionally, the model's design emphasizes both aesthetic appeal and functionality, making it a perfect centerpiece for any room. With its user-friendly controls, it allows easy adjustments to heat levels, offering a tailored experience for homeowners.

The 2822 model is known for its compact design, making it an ideal choice for smaller spaces. Despite its size, it does not compromise on performance, delivering a substantial heat output. This model is equipped with a dual-burner system that enhances its heating capabilities, ensuring a consistent and comfortable environment. Furthermore, its built-in safety features provide peace of mind, allowing users to enjoy their heating solution with confidence.

In contrast, the 2828 model offers a higher output, perfect for larger areas. Its innovative heat exchanger technology ensures optimal heat distribution throughout the space, making it a favorite among those with bigger homes. The model’s sleek design and customizable options allow homeowners to choose finishes that complement their existing decor, enhancing both the visual and functional aspects of their living areas.

The 820 model stands out with its unique style, offering a combination of traditional and modern aesthetics. This model features a powerful combustion system that maximizes efficiency while reducing fuel consumption. Its large viewing window provides a beautiful fire display, turning any space into a cozy retreat. The 820 is particularly favored among users who appreciate the ambiance of a traditional fireplace with the convenience of modern technology.

Finally, the 2825 model is designed for users seeking maximum customization. Its adjustable heating options and multiple finish choices allow homeowners to create a truly personalized experience. The advanced technology incorporated into the 2825 ensures enhanced performance, making it one of the most sought-after models in the Vermont Casting lineup.

In summary, the Vermont Casting 2823, 2822, 2828, 820, and 2825 models each have their unique features that cater to different heating needs. With advanced combustion technologies, customizable designs, and a commitment to efficiency, these stoves highlight Vermont Casting's reputation for quality and innovation in home heating solutions.
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