honeywell millivolt gas valve troubleshooting

4. 0000023014 00000 n After the adapter is installed, the gas control is attached to the adapter as outlined above. TABLE 7PRESSURE REGULATOR SPECIFICATION PRESSURES IN INCHES WC. This is an electrical connection and must be clean and dry. Do not exceed the input rating stamped on the appliance nameplate or manufacturer-recommended burner orifice pressure for the size orifice(s) used. One Q340A 36-inch thermocouple with adapters and clip. This increases gas pressure under the automatic valve and repositions the valve disc closer to the seat. In this HVAC Furnace Video, I go over the Operation and Troubleshooting of a 750 Millivolt Gas Valve and Thermopile/PowerPile. Turn the inner adjustment screw clockwise. 0000034533 00000 n Use only your hand to push down the reset button or turn the gas control knob. All adjustments, wiring connections, and pilot outlets are accessible from the top of the gas control. The maintenance program should include regular checkout of the gas control, see the Startup and Checkout section, and the control system as described in the appliance manufacturer literature. . Therefore, this unit may not exactly match the listed specifications. I show you how to Light the Pil. The gas control should e replaced if: It does not perform properly on checkout or troubleshooting. If you'd like to support the site, please allow ads. 0000016758 00000 n pressure drop for straight-through configuration). Terminal block color-coded beige.THERMOSTAT HEAT ANTICIPATOR SETTING:VR4200: 0.1AVR8200: 0.5ATYPE OF GAS: VR8200 and VR4200 set up for naturalgas includes a 393691 LP Conversion Kit. Supervision is needed by a licensed HVACR Tech while doing this as Experience and Apprenticeship garners Wisdom and Safety.Tool List- https://www.amazon.com/shop/acservicetechSupport- https://www.patreon.com/acservicetechWe've Partnered with TruTechTools.com! hW[o8+ID:BZ(gENRCD'$( m;\{fgc3llFQl%|xI!>-88zzhb|AtJOr[b4-BFS! 5. The combination of spring pressure under the second automatic valve diaphragm and the lack of outlet pressure holds the diaphragm firmly closed. A stuck valve could release gas into the air without regulation or the valve could cause the unit not to fire up at all. 1. 0000008848 00000 n Did this satellite streak past the Hubble Space Telescope so close that it was out of focus? IF THE MAIN BURNER IS OVERFIRINGAdjust the gas control pressure regulator to the correct pressure. View our resources. wc [0 kPa] to rated output pressure within 3-6 seconds (for an 80,000 Btuh furnace at 7 in. Millivolt systems have been the industry standard for decades, and are in some ways simpler to troubleshoot than electronic ignition systems. Filter. 0000013062 00000 n So, to diagnose a gas valve, first check to see if the pilot light is on. While taking a Millivolt reading on a safety magnet, disconnect thermocouple & wires from the valve. Your local Honeywell Residential and Building Controls Sales Office (check white pages of your phone directory). hb``b``r` LT, bBPQ%@AL;LiaP2l3 2 By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 0000013496 00000 n Determine if the pilot burner requires a thermocouple with a push-in clip or attachment nut, and attach the correct adapter to the. This is How to Wire the Thermopile to The 750mv Gas Valve for the Pilot and Main Gas Burners. I think I've had a service call on every millivolt system in my rentals.----I am debugging a Monessen millivolt gas valve. A. Thermocouple-Only: Found in: Most gas log sets with standard safety pilot knob control. The maximum regulated capacity is 200 feet 3 /hour [5.7 meters 3 /hour]. What is a word for the arcane equivalent of a monastery? There must be two terminals in this connector block that powers the gas valve coil. Advertisement Light the main burner. %%EOF The condition of the wiring is also suspect; loose connections, old oxidized control contacts, an old thermostat, are all potential problems. Resistance between the THTP & TH terminals must be 11.5 W0.2 W 2. the robertshaw link gives max lengths vs. gauge. 0000004689 00000 n 0000003696 00000 n The first automatic valve opens, and the second automatic valve operator valve disc is lifted off its seal. Category: HVAC. 0000072676 00000 n Avoid locating gas control where exposure to corrosive chemical fumes or dripping water are likely. Usually this problem can be resolved by using an adapter. If the red reset button stays depressed after it is released, replace the gas control. Do not force the gas control knob. I have an old millivolt gas furnace that's stopped working. 4 0 obj <> endobj Combination 1/4 inch quick-connect and screw terminals (includes convenience terminals), One 3/4 inch straight flange assembly (with O-ring and screws). 0000062529 00000 n The minimumregulated capacity is 40 feet 3 /hour for propane. 0000002246 00000 n Combination 1/4 inch quick-connect and screw terminals (includes convenience terminals). 0000003485 00000 n To adjust the pilot flame: LIGHT MAIN BURNERFollow the appliance manufacturer instructions or set the thermostat setting above room temperature to call for heat. 0000057737 00000 n Bulk update symbol size units from mm to map units in rule-based symbology. Regulator adjustment is accessible from top of gas control.MOUNTING: Can be mounted 0 to 90 degrees in any direction from the upright position of the gas control knob, including vertically.TEMPERATURE RATING:VR8200A,C,H,J; VR4200A,C,H: 0 F to +175 F [-18 C to +79 C].VR8200M,P; VR4200M,P: -40 F to +175 F [-40 C to +79 C]. This valve is only for vent free applications. https://www.trutechtools.com/?affid=43 Use our Promo Code: \"acservicetech\" for 8% off your order! The pilot light is auto so when the thermostat calls for heat, a spark is sent to the ignition lighting up the pilot. Mount gas control high enough above cabinet bottom to avoid exposure to flooding or splashing water. WIRINGFollow the wiring instructions furnished by the appliance manufacturer, if available, or use the general instructions provided below. trailer 7.). WARNING!FIRE OR EXPLOSION HAZARDS CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY OR DEATH.Do not disassemble the gas control; it contains no replaceable components. Intermittent use. I was trying to use the "MILLIVOLT TROUBLESHOOTING CHART", on page 2 of this . Some tips regarding the Honeywell Millivolt valve: Always ensure the switch is in the off position when lighting the pilot. Check the regulator setting either with a manometer or by clocking the gas meter. %%EOF 0000001116 00000 n 0000072700 00000 n Here are a couple pictures of the valve: Since this question was asked 1 year ago, I have to assume you have solved the problem. Troubleshooting the valve and looking for known common issues will give you peace of mind by ensuring the safe operation of your Honeywell appliance. 9. Solenoid-operated first automatic valve opens on thermostat call for heat and closes when the call for heat ends. I would verify the valve type - It would either be the SIT 820 or the Honeywell VS8420. Only the gas valve manufacturer or someone certified by the manufacturer of the gas valve can make repairs. Installation of Logs and Lava Rock Material. 0000041802 00000 n What sort of strategies would a medieval military use against a fantasy giant? This behaviour is consistent with what I have seen/heard when the Honeywell valves begin to fail. Insert bushing in gas control and thread pipe carefully into bushing until tight. I go over how it is Wired, what Voltages you should be reading while the flame is present and the voltages needed for the pilot valve and main gas valve to work correctly. The gas control knob must be held depressed or the thermocouple must be heated sufficiently to hold the safety control valve open.ON: Permits main burner and pilot gas flow. Seems my new millvolt gas valve turns off PILOT and MAIN BURNERS. Yes, this shows the pilot gen. in series with the limit switch in series with the t'stat. CONVENIENCE TERMINALS SERVE AS A TIE POINT ONLY. If you then smell gas in the appliance area or near the floor in an LP installation, immediately shut off the manual valve in the gas piping to the appliance or, with LP, shut off at the tank. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. The VR8200 Continuous Pilot Dual Automatic Valve Combination Gas Controls are used in gas-fired, standing pilot appliances. Use only your hand to push down the reset button or turn the gas control knob. If you do not smell gas, turn the knob on gas control counterclockwise. )POWER UNIT:Hold-in current: 300 mA maximum.Drop-out current: 250 to 90 mA.THERMOCOUPLE:Nominal output: 30 mV (0.018 ohms).Open Circuit Turndown Voltage: 2 mV.ELECTRICAL CONNECTIONS (2): 1/4 inch male quick-connects. Otherwise, take the necessary steps to provide proper gas pressure to the gas control. Push and hold down the red reset button (Figs. Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from any purchases after clicking through. . first the 360 millivolts you show should have been 750 to 800 millivolts since this is a pilot generator. By creating an account you agree to the Hunker, How to Light the Pilot Light on a Honeywell VR8200. Free shipping for many products! <<50A7D4D2F74D8141B7F3BE8FD5737B51>]/Prev 36635>> 0000139520 00000 n quick-connect terminals, must comply with applicable electrical codes and ordinances.Disconnect power supply before making wiring connections to prevent electrical shock or equipment damage. ' b1?T3/0.!0s.2c7oDp!c{|87*G2s>y~O9SNF. Allow the appliance to run through one complete cycle to ensure that the controls are functioning in the correct manner. Water heater not working? Never use pipe compound. Always install sediment trap in gas supply line to prevent contamination of gas control. Never use any tools. Set the thermostat or the device's controller slightly above the current room temperature. THEY ARE NOT INTERNALLY WIRED TO THE CONTROL CIRCUIT OR TO THE GROUND. 13. With the loss of outlet pressure, the second automatic valve closes and is held closed by spring pressure on the diaphragm. 0000011045 00000 n If it is flowing, measure the voltage between the 24V Hot and 24V Common leads to the SmartValve. Do not thread pipe too far. We might be able to do something about it. When installing the appliance as a rear vent unit, the 90. Install ThermocoupleThe Q340A Thermocouple (with adapters) is provided with SUPER TRADELINE models of the VR8200A. Tis the season. Turn off the main gas supply to the appliance. 46 0 obj <>stream Check the power supply rating on the valve and make sure it matches the available supply. Good Reading Bad Reading 6 terminals + 2 jumpers = 4 effective terminals = 4 nodes. The low-pressureregulator maintains outlet pressure at the preset step rate for several seconds. Exposure to water, dirt, chemicals, and heat can damage the gas control and shut down the control system. on Honeywell VR8200, VR4200 Combination Gas Controls User Guide, Honeywell Humidity Controllers User Guide, Honeywell S8910U Universal Hot Surface Ignition Module User Manual. Relight pilot burner and operate the system through one complete cycle to assure all controls operate properly. Standard-, slow- and step-opening models available. If you don't test, it's just a. The second automatic valve diaphragm, controlled by the servo pressure regulator, opens and adjusts gas flow as long as the system is powered and the pilot is burning. Slip the compression fitting over the tubing and slide out of the way. Paint all pipe connections upstream of the gas control with a rich soap and water solution. You must log in or register to reply here. Insert and tighten the screws provided with the flange. 0000026083 00000 n If the desired outlet gas pressure or gas flow rate cannot be achieved by adjusting the gas control, check the gas control inlet pressure using a manometer at the inlet pressure tap. The gas control knob is hard to turn or push down, or it fails to pop back up when released. Two convenience terminals on top of control(optional). Your email address will not be published. This is a very useful thread and am learning a lot from it partly because of my situation with my current Weil McClain boiler. Combination screw and quick-connect terminals on TRADELINE models. Failure to do so may result in fire or explosion. The condition of the wiring is also suspect; loose connections, old oxidized control contacts, an old thermostat, are all potential problems. 0000034510 00000 n Learn more about Stack Overflow the company, and our products. If the gas control knob or reset button will not operate by hand, the gas control should be replaced by a qualified service technician. 0000012806 00000 n This type of gas valve used a single thermocouple. And, it was very cost competitive to other non-Honeywell thermopiles. TRADELINE MODELSTRADELINE models are selected and packaged to provide ease of stocking, ease of handling and maximum replacement value. Always install horizontal venting on a level plane. These controls combine a manual gas cock, automatic pilot safety valve and a millivolt operator. Use a wrench on the square ends of the gas control. Bubbles indicate a gas leak. Thus the flow of gas through the second automatic valve is reduced, and outlet pressure falls to the desired level. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 0000098789 00000 n 0000028651 00000 n Ensure the main burner lights smoothly and without a flashback to the orifice and that all ports remain lit. 0000006141 00000 n 0000011989 00000 n Good reading is 0 to 0.2 Ohms . Do I need a thermal expansion tank if I already have a pressure tank? Works with the majority of millivolt gas valves; Push-in clip for easy installation included; . If any particular ad is your REASON for blocking ads, please let us know. Gas control is a safety device. 0000042992 00000 n For use in standing pilot appliances. If pilot burner flame still goes out, measure the open and closed thermocouple output voltage. If the switches are good, that sort of defaults to a bad gas valve. Check the transformer. 0000010110 00000 n I searched for that gas valve, and found this one as the replacement: I would seriously consider what Jimbo said, but, yes, if you bypass the t'stat and the limit switch with jumper wires and the pilot is on, the valve should open if the schematic is what I think it is. (50/60 Hz models available on request. If tubing is used, obtain a tube-to-pipe coupling to connect the tubing to the gas control. 0000016980 00000 n %PDF-1.5 % If: Measure the open and closed thermocouple output voltages and compare to the acceptable range charts in the thermocouple specifications or in the Gas Controls Handbook. 0000003373 00000 n Do not try to light any appliance. It only takes a minute to sign up. Loss of power closes the automatic valves, but leaves the pilot lit, ready to return to normal service when power is restored. It must be replaced in case of any physical damage such as bent terminals, missing or broken parts, stripped threads, or evidence of exposure to heat. Push tubing into the pilot gas tapping on the outlet end of the control until it bottoms. *If higher than 35mv check connections and switch. Models for natural or LPgas.ADDITIONAL FEATURES: STANDARD MODELSMODEL: VR8200 and VR4200 Continuous Pilot Dual Automatic Valve Combination Gas Controls. Comment * document.getElementById("comment").setAttribute("id","aac0d23d4efdcbcc5f3480c59cc4754f");document.getElementById("afe6277d1c").setAttribute("id","comment"); Save my name, email, and website in this browser for the next time I comment. With O-ring facing the gas control, align the screw holes on the gas control with the holes in the flange. Draw yourself the circuit. Safety shutoff or pilot gas proves complete shutdown since the safety shutoff valve permits main burner and pilot gas flow. Refer to Startup and Checkout section. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? . If the inlet pressure is in the normal range (refer to Table 7 or 8), replace the gas control. When the ow pressure regulator is fully open, the high-pressure regulator maintains the desired full-rate outlet pressure as described for the standard regulator.The step model requires approximately 60 seconds to reset once the main burner goes off. 0000023456 00000 n Except for the 123 mV this circuit is pretty well obvious. 0 See you next time at ACSERVICETECH Channel!Check out All of the ACSERVICETECH Playlists- https://www.youtube.com/channel/UCOZR-1IqsAer9wzlvFgb4mA/playlists?view_as=publicIf you want to support the ACSERVICETECH Channel and receive more HVAC content, check out www.Patreon.com/acservicetechACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.You can enter Amazon through this http://amzn.to/2aenwTqHere is a link to the Fieldpiece SC640 Multimeter- http://amzn.to/2x8k4KbHere is a link to the Fieldpiece SC660 Wireless Multimeter- http://amzn.to/2gWDUhcHere is the link for the Robertshaw low profile millivolt gas valve- http://amzn.to/2iLXzEhHere is the link for the White Rodgers 750mv thermopile- http://amzn.to/2zhKVnFHere is the link for the Robertshaw Pilot and 750mv Thermopile combo- http://amzn.to/2zZAH8wHere is the link for the Honeywell armored cable 750mv Thermopile- http://amzn.to/2yfR9UKHere is a link to the Pro 3000 24v Thermostat used in the video- http://amzn.to/2keuUbsHere is a link to the JB 6 CFM Vacuum Pump http://amzn.to/2nqbvo8Here is the Link to the Appion Blue 3/8\" to 1/4\" Vacuum Hose- http://amzn.to/2uYlVycHere is the Link to the Appion Red 3/8\" to 1/4\" Vacuum Hose- http://amzn.to/2uYg6RoHere is the link to the Appion Valve Core Removal Tool- http://amzn.to/2uYr8WLHere is the link to the Yellow Jacket 1/4\" by 1/4\" heavy duty hose straight- http://amzn.to/2umtcodHere is the link to the CPS Vacuum Micron Gauge- http://amzn.to/2v1nM3OHere is the link to the Supco Vacuum Micron Gauge- http://amzn.to/2v1JRiAHere is a link for RectorSeal Bubble Gas Leak Detector http://amzn.to/2ckWACnHere is a link to the UEI DL389 Multimeter used in the videos- http://amzn.to/2xAdaJfHere is the link to the Fieldpiece ST4 Dual Temp Meter- http://amzn.to/2wc1ME3Here is a link to the Air Acetylene Torch setup- http://amzn.to/2aQalsb Here is a link to the 15% Silver Brazing Rods- http://amzn.to/2gVLyLcHere is a link the Nitrogen Regulator http://amzn.to/2bXdR5fHere is a link to the Nitrogen Flow Meter http://amzn.to/2brvoBgHere is a link to the Digital Refrigerant Scale used in the videohttp://amzn.to/2b9oXYl Here is the Link for the Yellow Jacket Refrigerant Manifold Gauge Set used in the videos http://amzn.to/2aenwTqHere is a link to Refrigerant hoses with valves used in the videos http://amzn.to/2aBumVIHere is the link for the Imperial Kwik Charge 535-C- http://amzn.to/2uipEI6 Here is the link to the Fieldpiece SDMN6 Dual Pressure Testing Manometer with Pump-http://amzn.to/2jyK5KaHere is a link for the Supco Magnet Jumpers http://amzn.to/2gS4h6zHere is a link to 1 gallon of JB Vacuum Pump Oil http://amzn.to/2mGrlXyHere is a link to the General Tools digital Psychrometer http://amzn.to/2cSHsi1Here is a link to the Fieldpiece SDP2 Digital Psychrometer- http://amzn.to/2nniMVRHere is the link for the Ratcheting Service Wrench http://amzn.to/2dGV4NhHere is a link to the Appion G5 Twin Recovery Pump http://amzn.to/2dGSEyr Here is a link to the Malco Sheet metal scribe- http://amzn.to/2qCwu9DHere is a link to the Wiss Right Tin Snips- http://amzn.to/2rGnBvXHere is a link to the Wiss Bulldog snips- http://amzn.to/2rd1Dz5Here is a link to the Malco 90 Degree Right Hand Vertical Snips- http://amzn.to/2qHHpu4Here is the link for the Irwin Wire Stripper/Cutter/Crimper http://amzn.to/2dGTj2VThank You, ACSERVICETECH See Fig. Refer to the Adjust the Pilot Burner Flame section. 2 or 3) clockwise. If pilot burner flame still will not light: Assure the gas control knob is held in at least one minute to allow the thermocouple time to heat. The reduced pressure on the bottom of the automatic valve diaphragm repositions the diaphragm downward away from the valve seat, allowing main burner gas flow. cut tubing to the desired length and bend as necessary for routing to pilot burner. They include a safety shutoff, a manual valve, two automatic operators, a pressure regulator, a pilot adjustment, and a conduit cover (VR4200 only). A contractor came by and gave it a crack at it and said it was the gas valve but I'm not confident that that could be the problem as from reading this post, the thermoCOUPLE should be swapped out first before assuming it is the gas valve as it is a more pricey unit to replace. The rod, which should be cleaned annually, by the way, will heat up and send a millivolt signal down to its ceramic base and on to the control board. What you are experiencing is why such adjustments are discouraged! This includes a WIRING DIAGRAM. Also found in certain gas space heaters and construction-site portable heaters. 0000004302 00000 n For a better experience, please enable JavaScript in your browser before proceeding. If a gas leak is detected, tighten the pipe connection. Turn the gas control knob to the "On" position if the main burner does not turn on when the thermostat or controller is adjusted to start the appliance. WHEN THE THERMOSTAT CALLS FOR HEATThe gas control allows pilot and main burner gas flow during the thermostat ON cycle, as shown in Fig. Check the pilot burner flame adjustment. 0 0000098813 00000 n Push in firmly to lock in place. The diaphragm-operated second automatic valve opens under the control of the regulator and closes if gas or power supply is interrupted. 0000055329 00000 n Is there a solution to add special characters from software and how to do it. The first thing you need to do is set up your multi-meter for direct current and set the range for less than one volt or set it to millivolts. Assure the main burner primary air supply is properly adjusted for complete combustion (refer to the appliance manufacturer instructions). I tried that once already, but I won't again. Ensure the ambient temperature does not exceed the ambient temperature ratings for each component. 0000126162 00000 n 0000013473 00000 n thatguy, I hear you. 0000003019 00000 n 12Wiring connections for 120-volt control. Wiring terminal block color-coded beige to identify standing pilot models. Assure the main gas supply valve is open and the pilot gas supply line is purged of air. Adjust the thermostat several degrees higher than your current room temperature. Since these environments can cause the gas control to deteriorate more rapidly, the system should e checked more often. Any adjustments to gas control equipment should be checked using combustion efficiency test equipment by trained technicians. 2). Contact your Honeywell sales representative to request a gas valve with corrosion-resistant construction. Check your instruction manual to determine the voltage that should be running at your control valve circuit. In replacement applications, locate the gas control in the same location as the old gas control. Do not make sharp bends or deform the tubing. The servo pressure regulator monitors outlet pressure to provide n even the main burner gas flow. Now I'm sure my problem's the thermopile. home heater furnace blower doesn't turn on [SOLVED], Goodman GM880804BNBA ignitor will not stay on. Furnace gas valves cannot be repaired. Install sediment trap in the supply line to the gas control. 0000027369 00000 n The main burner gas flow is blocked by both automatic valves. Install the new plastic pressure regulator adjustment screw so that the top of the screw is flush (level) with the top of the regulator. If the appliance uses LP (bottled) gas, be sure to smell next to the floor because LP gas is heavier than air. Cover gas control if the appliance is cleaned with water, steam, or chemicals to avoid dust and grease accumulation. Run pipe or tubing to the gas control. This diverts gas flow from the automatic valve diaphragm and causes a reduction of pressure on the underside of this diaphragm. Several troubleshooting methods applied to and including bypassing the thermostat but failed to yield any results. Remove the burner access panel if provided on your appliance. Does that indicate more a gas valve problem or a thermopile generator/pilot flame problem? Oa$2vlmmpTx{>z)~pc|N*ona0 0000044905 00000 n Please comment and ask for videos that you would like to see in the future! The Honeywell Home trademark is used under license from Honeywell International Inc. . Otherwise, take the necessary steps to provide proper gas pressure to the gas control. I'm looking for help identifying what model it actually is (so I can search for information specific to it) or ideas on what might be wrong. This shuts off the pilot and main burner gas flow. Open the manual gas switch if the gas valve fails to operate and look to see if gas is flowing to the main burner or pilot. Residential and Building Controls Division Customer Satisfaction. Ever notice how civil DIY'ers are, generally? Always replace the cover screw after adjustment and tighten firmly to assure proper operation.