honeywell millivolt gas valve troubleshooting

In the "Resources for understanding gas valves" thread in the HVAC forum, someone wanted to know how a gas valve worked. 0000003696 00000 n Support horizontal pipes every 3 (91 cm) with metal pipe straps. Contact your Honeywell sales representative to request a gas valve with corrosion-resistant construction. 7.). Capacity rated at 130 feet 3 /hour at 1-inch WC pressure drop [3.7 m 3 /hr at 0.25 kPa]. Straight-through body pattern; right-angle adapters available for inlet and outlet. The best answers are voted up and rise to the top, Not the answer you're looking for? Thanks. I would verify the valve type - It would either be the SIT 820 or the Honeywell VS8420. 0000004421 00000 n Push tubing into the pilot gas tapping on the outlet end of the control until it bottoms. This behaviour is consistent with what I have seen/heard when the Honeywell valves begin to fail. 0000034510 00000 n A place where magic is studied and practiced? Mount the gas control so gas flow is in the direction of the arrow on the bottom of the gas control. 0000044882 00000 n The gas valve is the load.need to have current flow from one leg of the thermopilethrough the limit switch ( zero ohms ) througn the thermostat switch ( approx zero ohms on call for heat) through the coil of the valveand back to the other terminal of the generator. THEY ARE NOT INTERNALLY WIRED TO THE CONTROL CIRCUIT OR TO THE GROUND. 0000098789 00000 n To check for gas pipe leaks, put soap on the pipe connecting to the valve, if it bubbles, it means there's leakage. 394349 9/64 inch hex tool for flange assembly screws. I was trying to use the "MILLIVOLT TROUBLESHOOTING CHART", on page 2 of this . 0000023014 00000 n And we already know that the t'stat + terminal is jumpered to the t'couple + terminal, and that the t'stat - terminal is jumpered to the limit switch + terminal. Models for natural or LP gas. Free shipping for many products! You may have to wiggle it a bit before it comes loose. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! The low-pressureregulator maintains outlet pressure at the preset step rate for several seconds. ny outlet pressure change is immediately reflected back to the pressure regulator diaphragm, which repositions to change the flow rate through the regulator valve and, thus, through the diaphragm-operated automatic valve. A stuck valve could release gas into the air without regulation or the valve could cause the unit not to fire up at all. Gas control is a safety device. Oa$2vlmmpTx{>z)~pc|N*ona0 It looks like this: the thermopile is a generatorputs out up to 400 MV. If the knob or reset button will not operate by hand, replace the control using a qualified service technician. Set your thermostat to under the room's current temperature and let at least one minute pass to allow the appliance to attempt to get fuel. 0000098813 00000 n When the thermostat calls for heat, the first automatic valve and the second automatic valve operator open. Refer to Fig. Do not overtighten. Note that using an adapter increases the overall length of the gas control. Gas control operation is described in more detail below.VALVE POSITION DURING THERMOSTAT OFFCYCLEThe valve is positioned as shown in Fig. 0000028651 00000 n Check the transformer. 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. 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! Force or attempted repair may result in fire or explosion. Connect the other end of the tubing to the pilot burner according to pilot burner manufacturer instructions. . To ensure proper operation, follow these guidelines: Locate the gas control in the appliance vestibule on the gas manifold. 0000039900 00000 n To convert control from one gas to another: INSTALL ADAPTERS TO GAS CONTROLIf adapters are to be installed on the gas control, mount them as follows: USING ADAPTERS TO SOLVE SWING RADIUS PROBLEMSIn some field service applications, it is difficult or impossible to thread the gas control onto the gas supply pipe because of space limitations. 0000010110 00000 n 0000002119 00000 n To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Locate gas control in a well-ventilated area. For a better experience, please enable JavaScript in your browser before proceeding. 0000012695 00000 n Fig. a. TRADELINE model specifications are the same as those of standard models except as noted below.TRADELINE MODEL AVAILABLE: VR8200A Continuous Pilot Dual Automatic Combination Gas Control. http://www.robertshawtstats.com/spaw2/SiteContent/Files/faq/ControlTips-MillivoltSystems.pdf, http://en.wikipedia.org/wiki/American_wire_gauge, http://americanhvacparts.com/Merchantegory_Code=GV, http://americanhvacparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=GSV820A1047A&Category_Code=GV, http://en.wikipedia.org/wiki/Node_(circuits, http://www.emersonclimate.com/en-US/products/valves/Documents/0037-6264.pdf. Remove seal over gas control inlet or outlet. Usually this problem can be resolved by using an adapter. It does so for the very first instance both in the morning and night but thereafter, the pilot just stays lit and the chambers aren't lit or heating the house. This is How to Wire the Thermopile to The 750mv Gas Valve for the Pilot and Main Gas Burners. 44 0 obj <>stream The Thermopile, energized by the pilot flame, generates sufficient power to operate the gas valve and on/off switch. Step-Opening Pressure Regulation (VR8200C,P andVR4200P)Step-opening gas controls actually combine two pressure regulators, one for the low pressure and one for the full-rate pressure. I recommend you call a heating expert. mention that I got the main burner to light on 2 occassions by tapping on either the gas pipe before the main shutoff valve, or on the honeywell gas millivolt valve itself. Is it possible to rotate a window 90 degrees if it has the same length and width? 0000031358 00000 n Bulk update symbol size units from mm to map units in rule-based symbology. 0 F to +175 F [-18 C to +79 C] temperature range standard; -40 F to +175 F [-40 C to 79 C] available. If the voltage is dead or not as rated, replace the valve. If it goes out, repeat steps 36. Proper gas valve adjustment can save your home from a devastating fire. See Fig. Refer to Startup and Checkout section. Cover gas control if the appliance is cleaned with water, steam, or chemicals to avoid dust and grease accumulation. 0000007857 00000 n the manual gas control knob is in the ON position. Furnace gas valves cannot be repaired. Order number, SUPER TRADELINE or TRADELINE if desired. If necessary, adjust the pressure regulator to match the appliance rating. If the pilot flame goes out, turn the gas control knob clockwise, If the pilot flame remains lit, turn the gas control knob counterclockwise. Ever notice how civil DIY'ers are, generally? 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. Hold down the gas control knob about one minute, then release. Refer to the Adjust the Pilot Burner Flame section. I forgot to mention that I got the main burner to light on 2 occassions by tapping on either the gas pipe before the main shutoff valve, or on the honeywell gas millivolt valve itself. 0000026083 00000 n 0000057737 00000 n 0000137800 00000 n And, it was very cost competitive to other non-Honeywell thermopiles. As for the gas valve it is probably a "general controls" valve but any 800 millivolt gas valve can be used as a replacement. Resistance between the THTP & TH terminals must be 11.5 W0.2 W 2. 0000023590 00000 n You can test the rest of the system by temporarily replacing the generator with a 1.5 volt standard flashlight battery. If tubing is used, ensure the ends are square, deburred and clean. 0000013062 00000 n If it is re-energized within 60 seconds, it may bypass or shorten the length of the low-pressure step. Does that indicate more a gas valve problem or a thermopile generator/pilot flame problem? A normal reading will be in the range of 145 to 195 millivolts. rating 1/2 psi [3.5 kPa] inlet pressure.PRESSURE REGULATION: See Table 1. 10Installing thermocouple to the power unit. Disconnect power supply before wiring to prevent electrical shock or equipment damage. 2 or 3) clockwise. Insert bushing in gas control and thread pipe carefully into bushing until tight. Ensure the O-ring is fitted into the groove of the flange. Check fireplace to make sure it is levelled and properly positioned. 0000012011 00000 n 13. The pilot must be manually relit when normal burner operation is desired. Both pilot and main burner are shut off. . Do not make sharp bends or deform the tubing. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? Do not exceed the input rating stamped on the appliance nameplate or manufacturer-recommended burner orifice pressure for the size orifice(s) used. Place gas control knob in PILOT position. TO LIGHT THE PILOT BURNERSTOP! VR8200 for use with 24 Vac heating appliances and VR4200 for use with 120 . . Minimum regulated capacity is 20 feet 3 /hour [0.6 meters 3 /hour]. I'll show you how to troubleshoot and diagnose the problem with your water heater and Honeywell gas val. 0000011088 00000 n See Fig. Adjustable servo regulator effectively maintains almost constant gas output pressure under wide fluctuation in gas supply pressure. 2, 3 and 11, 12. %PDF-1.3 % Fig. This includes a WIRING DIAGRAM. See Table 3. an Elbow (angle) flange cannot provide a right-hand inlet when the ECO connector is used.NOTE: Flange Kits include one flange with attached O-ring and four mounting screws. When the gas control knob is manually turned to OFF. Check the ratings given in the instructions and on the product to ensure the product is suitable for your application. 15. Then tighten one more turn with a wrench. Light the main burner. 0000023456 00000 n Install Piping to Gas ControlAll piping must comply with local codes and ordinances or with the National Fuel Gas Code (ANSI Z223.1 NFPA No. wc [0.9 kPa] outlet pressure). 0000015431 00000 n 244 0 obj << /Linearized 1 /O 247 /H [ 2388 392 ] /L 541180 /E 139793 /N 4 /T 536181 >> endobj xref 244 91 0000000016 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. SUPER TRADELINE MODELSSUPER TRADELINE controls offer features not avail- able on TRADELINE or standard models, and are designed to replace a wide range of Honeywell and competitive controls.SUPER TRADELINE model specifications are the same as those of standard models except as noted below.SUPER TRADELINE MODEL AVAILABLE: VR8200A Continuous Pilot Dual Automatic Combination Gas Control. PRESSURE TAPPING: Inlet and outlet pressure taps accessible from the top of gas control. 4 0 obj <> endobj Both should be under cap screws. 0000126186 00000 n Turn the inner adjustment screw clockwise. 0000126162 00000 n Use a wrench on the square ends of the gas control. The maximum regulated capacity is 200 feet 3 /hour [5.7 meters 3 /hour]. Because gas is involved, problems with gas valves are a major safety concern. If you don't test, it's just a. 0000042992 00000 n Is a PhD visitor considered as a visiting scholar? Identify/troubleshoot this millivolt furnace valve, We've added a "Necessary cookies only" option to the cookie consent popup. first the 360 millivolts you show should have been 750 to 800 millivolts since this is a pilot generator. Turn the pressure regulator adjustment screw clockwise. Loss of pilot flame or flame too small to reliably light the main burner closes the safety shutoff valve and the second automatic valve. 0000066936 00000 n JavaScript is disabled. 0000139236 00000 n Install ThermocoupleThe Q340A Thermocouple (with adapters) is provided with SUPER TRADELINE models of the VR8200A. Wiring terminal block color-coded beige to identify standing pilot models. Turn off the gas supply valve to your appliance to test whether your valve is capable of shutting down properly. I was just wondering about this the other day. WIRINGFollow the wiring instructions furnished by the appliance manufacturer, if available, or use the general instructions provided below. The gas valve part numbe read more Remove the burner access panel if provided on your appliance. Adjust the thermostat several degrees above room temperature. By creating an account you agree to the Hunker, How to Light the Pilot Light on a Honeywell VR8200. 0000060666 00000 n 10 Easy Things to Check When Troubleshooting a Furnace Gas Valve. Connect the pipe to gas control inlet and outlet. SPECIFICATIONS Main Gas Connection: Valve: 3/8 in. 0000016758 00000 n The opening is slowed because a gas flow restrictor in the passage from the second automatic operator slows the rate at hich gas pressure is reduced under the second automatic valve diaphragm after the automatic operator opens. Where the cost of an unexpected shutdown would be high, the system should be checked more ften. 0000066914 00000 n Do not secure conduit cover at this time. Tis the season. Remove the regulator cap screw and pressure regulator adjusting screw. To avoid the dangerous accumulation of fuel gas, turn off the gas supply at the appliance service valve before starting the installation, and perform Gas Leak Test after completion of installation. Repeat after allowing the main burner to cool. 5. In this HVAC Furnace Video, I go over the Operation and Troubleshooting of a 750 Millivolt Gas Valve and Thermopile/PowerPile. ADJUST THE PILOT BURNER FLAMEThe pilot flame should envelop 3/8 to 1/2 in. Jumping between the TP/TH and TH does NOT turn the main burner on. Thus the flow of gas through the second automatic valve is reduced, and outlet pressure falls to the desired level. WHEN THE THERMOSTAT CALLS FOR HEATThe gas control allows pilot and main burner gas flow during the thermostat ON cycle, as shown in Fig. The VS8421 Millivolt Gas Valve has a 60,000 Btuh capacity (1 in. If the O-ring is not attached or is missing, do not use the flange. While holding tubing all the way in, slide compression fitting into place and engage threadsturn until finger tight. 0000017038 00000 n EASY FIXES! Appliances that are used seasonally should be checked before shutdown and again before the next use. Natural to LP gas conversion kit included with TRADELINE standard and slow-opening models. Exposure to water, dirt, chemicals, and heat can damage the gas control and shut down the control system. On LP gas installation, use compound resistant to LP gas. Set thermostat to the desired temperature. Determine if the pilot burner requires a thermocouple with a push-in clip or attachment nut, and attach the correct adapter to the. 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 With the main burner in operation, paint all pipe joints (including adapters) and gas control inlet and outlet with rich soap and water solution. 0000001317 00000 n If the pilot flame is engulfing the thermopile and you are not getting enough voltage to open the main gas valve then the thermopile may need to be replaced.Supervision is needed by a licensed HVAC Tech while doing this as Experience and Apprenticeship garners Wisdom and Safety.We've Partnered with TruTechTools.com! 0000003838 00000 n 0000003926 00000 n The Fora platform includes forum software by XenForo. Natural to LP gas conversion kit available for nonTRADELINE standard and slow-opening models. SIT 822 Valve with a Honeywell Electronic Igniter NOTE: Remove glass before servicing. For the VR4200, when the gas control is installed external to the appliance, install the conduit cover on the conduit fitting. When installing the appliance as a rear vent unit, the 90. 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 gas valve cannot be repaired in the field. The minimum regulated capacity is 20 feet 3 /hour [0.6 meters 3 /hour]. See Table 1 for model specifications.SUPPLY VOLTAGE:VR4200: 120 Vac, 60 Hz.VR8200: 24 Vac, 60 Hz. 0000019943 00000 n SAFETY SHUTOFF OPERATIONIn the safety shutoff position, pilot and main burner gas flow is permitted.Safety shutoff occurs: Gas Control Knob Turned to OFFWhen the gas control knob is turned to OFF, it pulls up and locks the reset button, and closes the first automatic valve. Relight pilot burner and operate the system through one complete cycle to assure all controls operate properly. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin?). 0000015409 00000 n TABLE 7PRESSURE REGULATOR SPECIFICATION PRESSURES IN INCHES WC. With the loss of outlet pressure, the second automatic valve closes and is held closed by spring pressure on the diaphragm. So in short, I get heat both times of the day for say an hour and it just sits idle with the pilot lit. ECO connector included with some models: also available as an accessory. Your local Honeywell Residential and Building Controls Sales Office (check white pages of your phone directory). Required fields are marked *. Safety shutoff or pilot gas proves complete shutdown since the safety shutoff valve permits main burner and pilot gas flow. Release button; the pilot should remain lit. 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. Wait five minutes to allow any gas in the combustion chamber to vent. 0000044905 00000 n Prices are the same as normal- https://www.amazon.com/shop/acservicetech Pilot gas flow should stop within 2-1/2 minutes. Continue to hold down the reset button for about one minute after the pilot is lit.