0000031358 00000 n The condition of the wiring is also suspect; loose connections, old oxidized control contacts, an old thermostat, are all potential problems. ' b1?T3/0.!0s.2c7oDp!c{|87*G2s>y~O9SNF. Turn off the gas supply valve to your appliance to test whether your valve is capable of shutting down properly. You must log in or register to reply here. Apply a moderate amount of good quality pipe compound to bushing, leaving two end threads bare. 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. Turn the gas control knob (Figs. Replace the thermocouple if voltages are outside the acceptable range. If the knob or reset button will not operate by hand, replace the control using a qualified service technician. Install the new plastic pressure regulator adjustment screw so that the top of the screw is flush (level) with the top of the regulator. MILLIVOLT SYSTEMS Millivolt systems provide their own power, so do not require outside battery power or line voltage to operate. 0000068133 00000 n The electrical/scientific basis for millivolt systems is the Seebeck 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. 394349 9/64 inch hex tool for flange assembly screws. Relight pilot burner and operate the system through one complete cycle to assure all controls operate properly. Inlet and outlet pressure taps included; both taps accessible from the top of gas control. 0000005616 00000 n %PDF-1.3 % Assure the main burner primary air supply is properly adjusted for complete combustion (refer to the appliance manufacturer instructions). Outlet pressure to the main burner increases gradually from 0 in. 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. Run pipe or tubing to the gas control. It only takes a minute to sign up. 0000039877 00000 n 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. Hold down the gas control knob about one minute, then release. 0000031335 00000 n . If a gas leak is detected, tighten the pipe connection. 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. 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. I have an old millivolt gas furnace that's stopped working. In replacement applications, locate the gas control in the same location as the old gas control. Except for the 123 mV this circuit is pretty well obvious. This decreases gas pressure under the second automatic valve diaphragm and repositions the valve disc further from the seat. Do not try to light any appliance. With the loss of outlet pressure, the second automatic valve closes and is held closed by spring pressure on the diaphragm. The adapter is installed on the end of the supply pipe in place of the gas control, following the same precautions and instructions that are used for installing the gas control. 4 0 obj <> endobj Check the power unit resistance. IMPORTANT: The specifications given in this publication do not include normal manufacturing tolerances. It has been obsolete for over 30 yrs now. Since these environments can cause the gas control to deteriorate more rapidly, the system should e checked more often. The maximum regulated capacity is 200 feet 3 /hour [5.7 meters 3 /hour]. 00. Release button; the pilot should remain lit. This behaviour is consistent with what I have seen/heard when the Honeywell valves begin to fail. Assure the gas control knob is in the ON position. Fig. Install ThermocoupleThe Q340A Thermocouple (with adapters) is provided with SUPER TRADELINE models of the VR8200A. The gas control is likely to have operated for more than 200,000 cycles. Dusty, wet, or corrosive environment. Check the regulator setting either with a manometer or by clocking the gas meter. If you'd like to support the site, please allow ads. 0000060689 00000 n The Fora platform includes forum software by XenForo. For screen reader problems with this website, please call 1-800-430 . 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 next time the valve fails to open you need to measure the voltage across this valve coil, or, better, the current through it.. What gauge number wire and what length do you use to your t'stat? 0000042992 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. 2 or 3) while you light the pilot burner. Locate the hot surface igniter and look for a spark or glow there. If you have additional questions, need further information, or would like to comment on our products or services, please write or phone: BODY PATTERN: Straight-through with 1/2 inch inlet and 1/2 inch outlet. 0000003816 00000 n The Thermopile, energized by the pilot flame, generates sufficient power to operate the gas valve and on/off switch. If it is, simply replace the igniter/flame rod assembly. PRESSURE TAPPING: Inlet and outlet pressure taps accessible from the top of gas control. Asking for help, clarification, or responding to other answers. 0000023014 00000 n 0000034510 00000 n I was just wondering about this the other day. Install the Q340A asfollows: Connect ThermocoupleConnect thermocouple lead as shown in Fig. 0000066914 00000 n Locate gas control in a well-ventilated area. hb``Pc`` _Ps400! You may have to wiggle it a bit before it comes loose. 0000012919 00000 n 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]. 7.). 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! TABLE 5MAXIMUM LENGTH OF SUPPLEMENTARY LIMIT LEAD WIRES WHEN USING Q340A THERMOCOUPLE. Your email address will not be published. In this HVAC Furnace Video, I go over the Operation and Troubleshooting of a 750 Millivolt Gas Valve and Thermopile/PowerPile. Use only glass approved by Vermont Castings, Majestic Products on this fireplace. Both should be under cap screws. 2, 3 and 11, 12. The power unit drops out, closing the safety valve and stopping all gas flow through the control.With the loss of outlet pressure, the second automatic valve closes and is held closed by spring pressure on the diaphragm. 0000044882 00000 n Push in firmly to lock in place. See Figs. Always replace the cover screw after adjustment and tighten firmly to assure proper operation. The pilot light is auto so when the thermostat calls for heat, a spark is sent to the ignition lighting up the pilot. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? When the thermostat calls for eat, the first automatic valve and the second automatic valve operator are energized. 0000013062 00000 n inlet and 1/2 inch outlet; adapters available for 3/8 or 3/4 inch. Appliances that are used seasonally should be checked before shutdown and again before the next use. PERFORM GAS LEAK TEST WARNING!FIRE OR EXPLOSION HAZARDS CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY, OR DEATH.Check for gas leaks with rich soap and water solution any time work is done on a gas control. wc [0 kPa] to rated output pressure within 3-6 seconds (for an 80,000 Btuh furnace at 7 in. 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. 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. Good Reading Bad Reading Paint all pipe connections upstream of the gas control with a rich soap and water solution. Such heavy cycling wears out the gas control in one to two years. Filter. CHECK SAFETY SHUTDOWN PERFORMANCEWARNING!FIRE OR EXPLOSION HAZARDS CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY, OR DEATH.Perform the safety shutdown test any time work is done on a gas system. This makes it ideal for fireplace and space heating uses that are vent free. endstream endobj startxref 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. . 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. When the gas control knob is manually turned to OFF. https://www.trutechtools.com/?affid=43 Use our Promo Code: \"acservicetech\" for 8% off your order! 0000004421 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. Failure to do so may result in fire or explosion. Flanges available for 3/8, 1/2 and 3/4 inch straight and 90 angle connection. 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. Cycle the main burner several times, allowing at least 30 seconds between cycles for the regulator to resume the step function. 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. The diaphragm-operated second automatic valve opens under the control of the regulator and closes if gas or power supply is interrupted. hex wrench, as noted.PILOT GAS OUTLET: Compression fitting for 1/4 in. What sort of strategies would a medieval military use against a fantasy giant? TABLE 6MAXIMUM LENGTH OF SUPPLEMENTARY LIMIT LEADWIRES WHEN USING Q309A THERMOCOUPLE. The automatic pilot safety is separate from the gas cock and provides gas shut Off in case of pilot Outage. first the 360 millivolts you show should have been 750 to 800 millivolts since this is a pilot generator. Do not secure conduit cover at this time. 0000018745 00000 n The main burner gas flow is blocked by both automatic valves. 0000062529 00000 n 0000055306 00000 n 0000049205 00000 n 0000002189 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 Ensure the O-ring is fitted into the groove of the flange. While taking a Millivolt reading on a safety magnet, disconnect thermocouple & wires from the valve. Turn the gas control knob counterclockwise. EASY FIXES! I show you how to Light the Pilot and Power the Main Burner! 0000036872 00000 n the manual gas control knob is in the ON position. 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. The gas valve part numbe read more The condition of the wiring is also suspect; loose connections, old oxidized control contacts, an old thermostat, are all potential problems. See Fig. Ensure the installer is a trained, experienced service technician. Then the regulator valve is forced fully open by the timing diaphragm, which is operated by bleed gas. Capacity rated at 130 feet 3 /hour at 1-inch WC pressure drop [3.7 m 3 /hr at 0.25 kPa]. Determine if the pilot burner requires a thermocouple with a push-in clip or attachment nut, and attach the correct adapter to the. 0000098789 00000 n Adjustable servo regulator effectively maintains almost constant gas output pressure under wide fluctuation in gas supply pressure. I suspect they are the "white" terminal and TH1. Maintenance frequency must be determined individually for each application. Do not remove the existing window frame assembly. For push-in clip-type pilot burners: From beneath, insert the tip of the Q340 into the hole or barrel of the pilot burner. Good reading is 0 to 0.2 Ohms . I would recommend replacing all the wiring and controls and the pilot generator. TROUBLESHOOTING MILLIVOLT GAS VALVES PART # 023625 (NATURAL) & 023624 (LP) TroubleMillvoltGasV 04/16 . Troubleshooting an IID control system calls for an AC voltmeter with a 220-volt range or greater. Does that indicate more a gas valve problem or a thermopile generator/pilot flame problem? 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. Never use any tools. 0000068110 00000 n 0000002119 00000 n trailer << /Size 335 /Info 243 0 R /Encrypt 246 0 R /Root 245 0 R /Prev 536170 /ID[] >> startxref 0 %%EOF 245 0 obj << /Type /Catalog /Pages 242 0 R >> endobj 246 0 obj << /Filter /Standard /R 2 /O (__LD98yc0\r!) /U (\rUob!Yd2U/>6q6) /P -44 /V 1 >> endobj 333 0 obj << /S 97 /Filter /FlateDecode /Length 334 0 R >> stream Take care when handling the refractory panels as they are fragile until held in place and supported. If above 11 ohms, replace the gas control. *If higher than 35mv check connections and switch. 46 0 obj <>stream 2). This includes a WIRING DIAGRAM. 0 F to +175 F [-18 C to +79 C] temperature range standard; -40 F to +175 F [-40 C to 79 C] available. Usually this problem can be resolved by using an adapter. The VR8200 Continuous Pilot Dual Automatic Valve Combination Gas Controls are used in gas-fired, standing pilot appliances. If the appliance is a hot water heater but it's not firing up, the thermopile might be weak. I hope you enjoy and find them very beneficial! Check the power supply rating on the valve and make sure it matches the available supply. 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.
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