There should not be a flame-up there if the valve is working correctly. WARNING!FIRE OR EXPLOSION HAZARDS CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY OR DEATH.Do not disassemble the gas control; it contains no replaceable components. Then the regulator valve is forced fully open by the timing diaphragm, which is operated by bleed gas. Never use any tools. In this HVAC Furnace Video, I go over the Operation and Troubleshooting of a 750 Millivolt Gas Valve and Thermopile/PowerPile. As the pressure inside the gas control and underneath the automatic valve diaphragm equalizes, spring pressure closes the second automatic valve to provide a second barrier to gas flow. The main burner should go off and the pilot should remain lit. This behaviour is consistent with what I have seen/heard when the Honeywell valves begin to fail. 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. If the O-ring is not attached or is missing, do not use the flange. A1/{;_Fe o(*=`. 4. 0000013008 00000 n The first automatic valve opens, and the second automatic valve operator valve disc is lifted off its seal. 2 or 3) while you light the pilot burner. 0000031335 00000 n 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. The automatic pilot safety is separate from the gas cock and provides gas shut Off in case of pilot Outage. If tubing is used, obtain a tube-to-pipe coupling to connect the tubing to the gas control. If desired outlet pressure or flow rate cannot be achieved by adjusting the gas control, check the inlet pressure using a manometer at the inlet pressure tap or upstream of the gas control. 0000011045 00000 n 0000055329 00000 n 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! thatguy, I hear you. 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. If necessary, adjust the pressure regulator to match the appliance rating. Your system is quite old and somewhat unsafe, in that the pilot comes off ahead of the safety valve. VR8200J has a six-second delay from when the thermostat calls for heat until the main gas valve opens. Home and Building ControlHoneywell Inc.1985 Douglas Drive NorthGolden Valley, Minnesota 55422, Home and Building ControlHoneywell LimitedHoneywell Limite740 Ellesmere RoadScarborough, OntarioM1P 2V9, This is a legacy product document supported by Resideo. 0000016980 00000 n Set thermostat to the desired temperature. How to tell which packages are held back due to phased updates, Short story taking place on a toroidal planet or moon involving flying. Use a wrench on the square ends of the gas control. To adjust the pilot flame: LIGHT MAIN BURNERFollow the appliance manufacturer instructions or set the thermostat setting above room temperature to call for heat. . When the pilot goes out, the thermocouple current drops and the power unit drops out, closing the safety shutoff valve. Natural to LP gas conversion kit included with TRADELINE standard and slow-opening models. Draw yourself the circuit. Your problem seems to involve large -- really large -- "industrial size" issues. In the "Resources for understanding gas valves" thread in the HVAC forum, someone wanted to know how a gas valve worked. Bubbles indicate a gas leak. 0000010874 00000 n Readings outside this range indicate the gas valve is defective and must be replaced. Gas control is a safety device. Ensure the ambient temperature does not exceed the ambient temperature ratings for each component. Flanges available for 3/8, 1/2 and 3/4 inch straight and 90 angle connection. I suspect they are the "white" terminal and TH1. The diaphragm-operated second automatic valve opens under the control of the regulator and closes if gas or power supply is interrupted. SIT 822 Valve with a Honeywell Electronic Igniter NOTE: Remove glass before servicing. Use new, properly reamed pipe free from chips. home heater furnace blower doesn't turn on [SOLVED], Goodman GM880804BNBA ignitor will not stay on. Safety shutoff or pilot gas proves complete shutdown since the safety shutoff valve permits main burner and pilot gas flow. 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. rev2023.3.3.43278. 0000011836 00000 n The combination of spring pressure under the second automatic valve diaphragm and the lack of outlet pressure holds the diaphragm firmly closed. 0000006973 00000 n EASY FIXES! This is How to Wire the Thermopile to The 750mv Gas Valve for the Pilot and Main Gas Burners. LP to natural gas conversion kit available for standard and slow-opening models. Troubleshooting the valve and looking for known common issues will give you peace of mind by ensuring the safe operation of your Honeywell appliance. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. Installation of Logs and Lava Rock Material. If it fires, it is working correctly. Using Kolmogorov complexity to measure difficulty of problems? 0000139215 00000 n One Q340A 36-inch thermocouple with adapters and clip. Good reading is 0 to 0.2 Ohms . 2. ' b1?T3/0.!0s.2c7oDp!c{|87*G2s>y~O9SNF. If it goes out, repeat steps 36. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Unscrew compression fitting from the pilot outlet (Fig. Taps are 1/8 inch NPT with a plug containing recess for 3/16 inch Allen wrench.PRESSURE RATING: A.G.A. DO NOT JUMPER THESE TERMINALS. The best answers are voted up and rise to the top, Not the answer you're looking for? WIRINGFollow the wiring instructions furnished by the appliance manufacturer, if available, or use the general instructions provided below. Take care when handling the refractory panels as they are fragile until held in place and supported. When installing the appliance as a rear vent unit, the 90. The pilot must be manually relit when normal burner operation is desired. Ever notice how civil DIY'ers are, generally? They include a safety shutoff, a manual valve, two automatic operators, a pressure regulator, a pilot adjustment, and a conduit cover (VR4200 only). POWER SUPPLY. If the reading is higher,magnet is defective therefore Change the Valve - Do not try to repair. If any particular ad is your REASON for blocking ads, please let us know. 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]. 0000001836 00000 n - Reg. Learn more about Stack Overflow the company, and our products. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. This may burn out the heat anticipator in the thermostat or damage the DI module.IMPORTANT: Allow 60 seconds after shutdown before reenergizing the step-opening model to assure light off at step pressure. Install thermostat, and other controls as required. Also found in certain gas space heaters and construction-site portable heaters. This is How to Wire the Thermopile to The 750mv Gas Valve for the Pilot and Main Gas Burners. 0 When the thermostat calls for eat, the first automatic valve and the second automatic valve operator are energized. 394349 9/64 inch hex tool for flange assembly screws. 0000072700 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. TRADELINE kits include a 9/64 in. Thanks. Dusty, wet, or corrosive environment. This includes a WIRING DIAGRAM. Do not use a gas control set for natural gas on an LP gas system or a gas control set for LP gas on a natural gas system. 0000023590 00000 n Category: HVAC. When the gas control knob is manually turned to OFF. Gas control operation is described in more detail below.VALVE POSITION DURING THERMOSTAT OFFCYCLEThe valve is positioned as shown in Fig. 0000018745 00000 n Advertisement 0000017288 00000 n Light the main burner. %%EOF 0000003926 00000 n 0000002246 00000 n Check the power supply rating on the valve and make sure it matches the available supply. Thanks for contributing an answer to Home Improvement Stack Exchange! It looks like this: the thermopile is a generatorputs out up to 400 MV. Attempt to light pilot burner flame following procedures in the Light the Pilot Burner Flame section. JavaScript is disabled. Replace the thermocouple if voltages are outside the acceptable range. hex wrench, as noted.PILOT GAS OUTLET: Compression fitting for 1/4 in. This type of gas valve used a single thermocouple. 10Installing thermocouple to the power unit. If the pilot flame has gone out, follow these instructions exactly: TO TURN OFF THE APPLIANCEVACATION SHUTDOWN: Turn gas control knob clockwise from ON to PILOT. Home Honeywell Honeywell VR8200, VR4200 Combination Gas Controls User Guide. PRESSURE TAPPING: Inlet and outlet pressure taps accessible from the top of gas control. This category contains Honeywell SmartValve, Gas Controls, Millivolts, Pressure Regulators, Gas Control Parts and Industrial Gas Valves. a. 0000000016 00000 n How do you ensure that a red herring doesn't violate Chekhov's gun? 44 0 obj <>stream 2 or 3. Proper gas valve adjustment can save your home from a devastating fire. 0000066914 00000 n Fig. Loss of power closes the automatic valves, but leaves the pilot lit, ready to return to normal service when power is restored. Refer to Fig. If it is flowing, measure the voltage between the 24V Hot and 24V Common leads to the SmartValve. 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. 0000010088 00000 n 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 Exposure to water, dirt, chemicals, and heat can damage the gas control and shut down the control system. Find many great new & used options and get the best deals for Robertshaw 710-502 Millivolt Low Capacity Gas Valve, 1/2" x 1/2", 70,000 BTU at the best online prices at eBay! 6. Slip the compression fitting over the tubing and slide out of the way. Pilot gas flows through a port in the ushing around the reset button shaft to the pilot burner. 0000066936 00000 n May be installed at any angle between 0 and 90 degrees from the upright position, including vertically. 0000068133 00000 n Do not thread pipe too far. This valve is only for vent free applications. Order separately: pilot burner, thermocouple, transformer, limit controller, and thermostat or controller as required. 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. Do not touch any electrical switch or use the phone. Identify/troubleshoot this millivolt furnace valve, We've added a "Necessary cookies only" option to the cookie consent popup. Leave the building and call your gas supplier. This material is proprietary to Honeywell Limited and shall not be reproduced, copied or used in any manner without prior written consent of . 0000002758 00000 n Now I'm sure my problem's the thermopile. The three-position manual gas control knob has ON, OFF, and PILOT positions. Apply a moderate amount of good quality pipe compound to bushing, leaving two end threads bare. Kit for conversion from LP to natural gas is available for standard and slow opening models. Use only your hand to push down the reset button or turn the gas control knob. The Thermopile, energized by the pilot flame, generates sufficient power to operate the gas valve and on/off switch. While holding tubing all the way in, slide compression fitting into place and engage threadsturn until finger tight. 0000003019 00000 n After the adapter is installed, the gas control is attached to the adapter as outlined above. Asking for help, clarification, or responding to other answers. Push in firmly to lock in place. The minimumregulated capacity is 40 feet 3 /hour for propane. If the appliance uses LP (bottled) gas, be sure to smell next to the floor because LP gas is heavier than air. 0000052145 00000 n *If higher than 35mv check connections and switch. Adjust the thermostat several degrees higher than your current room temperature. If the gas control knob or reset button will not operate by hand, the gas control should be replaced by a qualified service technician. cut tubing to the desired length and bend as necessary for routing to pilot burner. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. 0000002119 00000 n 54), whichever applies. It must measure at least 19.5VAC with the igniter powered. Check the pilot burner flame adjustment. 0000003696 00000 n Bashing my head against the walls in some of the internet's finest chat rooms. hb``Pc`` _Ps400! Use conversion factors in Table 2 to convert to capacities for other gases. 0000023567 00000 n If you don't test, it's just a. 0000005748 00000 n Install ThermocoupleThe Q340A Thermocouple (with adapters) is provided with SUPER TRADELINE models of the VR8200A. Regulator Cap Conversion Screw Pressure Regulator Housing, Cleaning the Standing Pilot Control System. 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. . After installation is complete, use these instructions to check out product operation. Check the wiring between the thermocouple and the gas control valve operator. 0000060689 00000 n Because gas is involved, problems with gas valves are a major safety concern. The ON position allows pilot burner and main burner gas low under control of the thermostat and the two automatic valves. Pilot gas flow should stop within 2-1/2 minutes. The gas control must be manually reset. . If the pilot flame goes out, turn the gas control knob clockwise, If the pilot flame remains lit, turn the gas control knob counterclockwise. Below are my tests: Jimbo, Thanks for that tip. JavaScript is disabled. I go over what to do if you are not receiving the correct voltages. If the knob or reset button will not operate by hand, replace the control using a qualified service technician. Seems my new millvolt gas valve turns off PILOT and MAIN BURNERS. Such heavy cycling wears out the gas control in one to two years. See Figs. Wait five minutes to allow any gas in the combustion chamber to vent. The Honeywell Home trademark is used under license from Honeywell International Inc. . Since these environments can cause the gas control to deteriorate more rapidly, the system should e checked more often. Any help and/or comment would be greatly appreciated. If outlet pressure begins to rise, the pressure regulator the diaphragm moves slightly higher, allowing less gas flow to the gas control outlet. hbbd``b`~@q3` A@e:X 2 D !HWX m 40d# $ ? The VS8421 Millivolt Gas Valve has a 60,000 Btuh capacity (1 in. Appliances that are used seasonally should be checked before shutdown and again before the next use. Adjustable servo regulator effectively maintains almost constant gas output pressure under wide fluctuation in gas supply pressure. White-Rodgers, Honeywell, and other valves makers will usually have it pre-set to that 3.5 wc, some installers forget . Connect the other end of the tubing to the pilot burner according to pilot burner manufacturer instructions. 0000018497 00000 n If it then "clicks" meaning it is opening with voltage supplied to it than most likely it's not the gas valve which is bad. TABLE 5MAXIMUM LENGTH OF SUPPLEMENTARY LIMIT LEAD WIRES WHEN USING Q340A THERMOCOUPLE. 7.). Please comment and ask for videos that you would like to see in the future! 0000006141 00000 n Always install horizontal venting on a level plane. If the inlet pressure is in the normal range (refer to Table 7 or 8), replace the gas control. Check the power unit resistance. In many such applications, particularly commercial cooking, the equipment operates 100,000-200,000 cycles per year. If your gas supplier cannot be reached, call the fire department. 0000016083 00000 n Extinguish pilot flame. 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. I would not work on it, without completely replaceing the gas control system, and the furnace may not be worth that expense. Lv 4. 0 F to +175 F [-18 C to +79 C] temperature range standard; -40 F to +175 F [-40 C to 79 C] available. What is a word for the arcane equivalent of a monastery? For screen reader problems with this website, please call 1-800-430 . Therefore, this unit may not exactly match the listed specifications. 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. Only the gas valve manufacturer or someone certified by the manufacturer of the gas valve can make repairs. 0000015409 00000 n Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from any purchases after clicking through. Cover gas control if the appliance is cleaned with water, steam, or chemicals to avoid dust and grease accumulation. When making the conversion, the main pilot burner orifices must be changed to meet the appliance manufacturer specifications. When the thermostat calls for heat, the first automatic valve and the second automatic valve operator open. Avoid locating gas control where exposure to corrosive chemical fumes or dripping water are likely. Capacity is based on 1000 Btu/feet 3, 0.64 specific gravity natural gas at 1-inch water column pressure drop [37.3 MJ/meters 3, 0.64 specific gravity natural gas at 0.25 kPa pressure drop].The maximum regulated capacity is 200 feet 3 /hour [5.7 meters 3 /hour]. Water heater not working? If so, how close was it? These controls combine a manual gas cock, automatic pilot safety valve and a millivolt operator. Both pilot and main burner are shut off. Your local Honeywell Residential and Building Controls Sales Office (check white pages of your phone directory). Tech Guru. If the reset button does not pop up when released, stop immediately and call your service technician or gas supplier. By creating an account you agree to the Hunker, How to Light the Pilot Light on a Honeywell VR8200. Models for natural or LP gas. CHECK AND ADJUST GAS INPUT TO THE MAIN BURNER, Standard-Opening and Slow-Opening Pressure Regulator, Step-Opening Pressure Regulator and Delayed and Step-Opening Pressure Regulator. Required fields are marked *. See Table 1 for model specifications.SUPPLY VOLTAGE:VR4200: 120 Vac, 60 Hz.VR8200: 24 Vac, 60 Hz. When the pilot goes out or becomes too small to sustain normal ignition. Two convenience terminals on top of control(optional). 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. A stuck valve could release gas into the air without regulation or the valve could cause the unit not to fire up at all. If you have not I will give some ideas. Install the new plastic pressure regulator adjustment screw so that the top of the screw is flush (level) with the top of the regulator. 0000098813 00000 n 0000028639 00000 n Regular preventive maintenance is important in applications that place a heavy load on system control such as in the commercial looking and agricultural and industrial industries because: The VR8200, VR4200 gas controls provide 3-position (OFF-PILOT-ON) manual control of gas flow. WARNING!FIRE OR EXPLOSION HAZARDS CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY, OR DEATH. What you are experiencing is why such adjustments are discouraged! Do not secure conduit cover at this time. pressure drop for straight-through configuration). If tubing is used, ensure the ends are square, deburred and clean. I recommend you call a heating expert. Refer to Startup and Checkout section. If you do not smell gas, turn the knob on gas control counterclockwise. 0000042992 00000 n Some tips regarding the Honeywell Millivolt valve: Always ensure the switch is in the off position when lighting the pilot. Thus, the flow of gas through the second automatic valve is increased, and outlet pressure rises to the desired level.Slow-Opening Pressure Regulation (VR8200H and VR4200H); Delayed and Slow-opening Regulation (VR8200J)Slow-opening gas controls function the same as standard models except that when the thermostat calls for heat, the second automatic alve pens gradually. Prices are the same as normal- https://www.amazon.com/shop/acservicetech With the main burner operating, check the gas control flow rate using the meter clocking method or check the gas pressure using a manometer connected to the gas control outlet pressure tap. VR8200 for use with 24 Vac heating appliances and VR4200 for use with 120 . Continue to hold down the reset button for about one minute after the pilot is lit. Some considerations are: Cycling frequency. 250 items. Do not make sharp bends or deform the tubing. Use only your hand to push down the reset button or turn the gas control knob. When Pilot Flame Goes OutWhen the pilot flame goes out or is too small to reliably light the main burner, thermocouple output drops below the power unit hold-in valve. If so, then the thermocouple or thermopile is generating enough voltage to keep the safety valve open. 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. Failure to do so may result in fire or explosion. It has been obsolete for over 30 yrs now. 9. A. Thermocouple-Only: Found in: Most gas log sets with standard safety pilot knob control. Gas valves exposed to high ammonia conditions, i.e., those used in greenhouses or animal barns may fail in one or two years. To learn more, see our tips on writing great answers. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! 0000057714 00000 n 5. Also, this product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed. Do not try to light any appliance. See Fig. 0000016504 00000 n 0000012919 00000 n Do not force the gas control knob on the appliance. The gas control is likely to have operated for more than 200,000 cycles. As for the gas valve it is probably a "general controls" valve but any 800 millivolt gas valve can be used as a replacement. honeywell millivolt gas valve troubleshooting From Gas Control Valve 1- Turn main gas on and proceed to next step. 0000002388 00000 n Hold each tester wand on the multimeter to one of the terminals on the gas valve. Ensure the installer is a trained, experienced service technician. 0000004302 00000 n Solenoid-operated first automatic valve opens on thermostat call for heat and closes when the call for heat ends. 0000027628 00000 n The pilot light is auto so when the thermostat calls for heat, a spark is sent to the ignition lighting up the pilot. The small valve seat attached to the reset button closes and shuts off the pilot gas flow. %%EOF 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! To ensure proper operation, follow these guidelines: Locate the gas control in the appliance vestibule on the gas manifold. Replace the thermocouple if voltages are outside the acceptable range. A normal reading will be in the range of 145 to 195 millivolts. 0000001836 00000 n Carefully check the main burner light off at the step pressure. We might be able to do something about it. 0000041780 00000 n Capacity rated at 130 feet 3 /hour at 1-inch WC pressure drop [3.7 m 3 /hr at 0.25 kPa]. 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. For push-in clip-type pilot burners: From beneath, insert the tip of the Q340 into the hole or barrel of the pilot burner. Note that using an adapter increases the overall length of the gas control. endstream endobj 11 0 obj <> endobj 12 0 obj <> endobj 13 0 obj <>stream In replacement applications, locate the gas control in the same location as the old gas control. ADJUST THE PILOT BURNER FLAMEThe pilot flame should envelop 3/8 to 1/2 in. 0000139520 00000 n Refer to Fig. So, to diagnose a gas valve, first check to see if the pilot light is on. See Fig. Gas valves are not serviceable; the following are simple troubleshooting and description of how gas valves operate. 2 or 3) clockwise. wc [0 kPa] to rated output pressure within 3-6 seconds (for an 80,000 Btuh furnace at 7 in.
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