honeywell millivolt gas valve troubleshooting

Use an ac voltmeter to measure the voltage across terminals TH and TR. 0000003696 00000 n Zero clearance sleeve is only required for combustible walls. WARNINGFIRE OR EXPLOSION HAZARDS CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY, OR DEATH. *If higher than 35mv check connections and switch. WIRINGFollow the wiring instructions furnished by the appliance manufacturer, if available, or use the general instructions provided below. Good Reading Bad Reading Remove the pilot adjustment cover screw. I have a Superior Gas Fireplace model DR-500CMP that currently has a Honeywell Millivolt Gas Valve that I need to replace but the part number does not cross to a valid number. 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. Cycle the main burner several times, allowing at least 30 seconds between cycles for the regulator to resume the step function. 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? inlet and 1/2 inch outlet; adapters available for 3/8 or 3/4 inch. Remove the thermopile wiring connector from the gas control. Install ThermocoupleThe Q340A Thermocouple (with adapters) is provided with SUPER TRADELINE models of the VR8200A. 0000042992 00000 n 0 F to +175 F [-18 C to +79 C] temperature range standard; -40 F to +175 F [-40 C to 79 C] available. 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]. 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. Locate gas control in a well-ventilated area. The burner may relight at the full flow rate. 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. Regulator Cap Conversion Screw Pressure Regulator Housing, Cleaning the Standing Pilot Control System. 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! VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. If it is flowing, measure the voltage between the 24V Hot and 24V Common leads to the SmartValve. 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. The first automatic valve is closed. If the inlet pressure is in the normal range (refer to Table 7 or 8), replace the gas control. A consequence of unexpected shutdown. https://www.trutechtools.com/?affid=43 Use our Promo Code: \"acservicetech\" for 8% off your order! Thus the flow of gas through the second automatic valve is reduced, and outlet pressure falls to the desired level. When the pilot remains lit, turn the gas control knob counterclockwise. It only takes a minute to sign up. This type of gas valve used a single thermocouple. Capacity rated at 130 feet 3 /hour at 1-inch WC pressure drop [3.7 m 3 /hr at 0.25 kPa]. Replace the part if the gas leak cannot be stopped. Two convenience terminals on top of control(optional). Use a wrench on the square ends of the gas control. This is How to Wire the Thermopile to The 750mv Gas Valve for the Pilot and Main Gas Burners. 0000002758 00000 n Always replace the cover screw after adjustment and tighten firmly to assure proper operation. The VR8200 Continuous Pilot Dual Automatic Valve Combination Gas Controls are used in gas-fired, standing pilot appliances. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. %%EOF Cover gas control if the appliance is cleaned with water, steam, or chemicals to avoid dust and grease accumulation. See Fig. View our resources. Force or attempted repair can result in fire or explosion. <<50A7D4D2F74D8141B7F3BE8FD5737B51>]/Prev 36635>> (See Fig. Required fields are marked *. Oa$2vlmmpTx{>z)~pc|N*ona0 Is there a solution to add special characters from software and how to do it. Dont touch any electrical switch or use the phone. Mount gas control high enough above cabinet bottom to avoid exposure to flooding or splashing water. 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. This category contains Honeywell SmartValve, Gas Controls, Millivolts, Pressure Regulators, Gas Control Parts and Industrial Gas Valves. TABLE 6MAXIMUM LENGTH OF SUPPLEMENTARY LIMIT LEADWIRES WHEN USING Q309A THERMOCOUPLE. Use conversion factors in Table 2 to convert to capacities for other gases. 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. You must log in or register to reply here. And after two or so minutes, the gas chambers will be lit. 0000034533 00000 n INSTRUCTIONS TO THE HOMEOWNER FOR YOUR SAFETY, READ BEFORE OPERATING WARNING!IF YOU DO NOT FOLLOW THE WARNINGS BELOW AND THE LIGHTING INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION CAN RESULT WITH PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE. Do not exceed the input rating stamped on the appliance nameplate or manufacturer-recommended burner orifice pressure for the size orifice(s) used. Models for natural or LP gas. The combination of spring pressure under the second automatic valve diaphragm and the lack of outlet pressure holds the diaphragm firmly closed. The pilot will remain lit, ready for return to normal service without relighting.COMPLETE SHUTDOWN: Turn the gas control knob clockwise to OFF. 0000066936 00000 n Install sediment trap in the supply line to the gas control. 0000007879 00000 n 0000011066 00000 n This product was the perfect replacement for the Honeywell thermopile in a circa 1975 gas fireplace unit. 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. Push in firmly to lock in place. Filter. (50/60 Hz models available on request. It has been obsolete for over 30 yrs now. Refer to Table 7 or 8 for factory-set nominaloutlet pressures and adjustment ranges. Why Do the Burners Work but the Oven Does Not Work on My Gas Stove. You may have to wiggle it a bit before it comes loose. Kit for conversion from LP to natural gas is available for standard and slow opening models. Any help and/or comment would be greatly appreciated. VR8200 for use with 24 Vac heating appliances and VR4200 for use with 120 Vac heating appliances that burn natural or liquefied petroleum (LP) gas. Always install sediment trap in gas supply line to prevent contamination of gas control. Use only your hand to push down the reset button or turn the gas control knob. Category: HVAC. 0000017061 00000 n Ensure the ambient temperature does not exceed the ambient temperature ratings for each component. 0000010110 00000 n Read the safety information in the WARNING.This appliance has a pilot burner, which must be lit by hand. SPECIFICATIONS Main Gas Connection: Valve: 3/8 in. 0000004711 00000 n I'll show you how to troubleshoot and diagnose the problem with your water heater and Honeywell gas val. Helping You to Do It Yourself! The automatic pilot safety is separate from the gas cock and provides gas shut Off in case of pilot Outage. 13. IF CHECKING GAS INPUT BY CLOCKING THE GAS METER: IF CHECKING GAS INPUT WITH A MANOMETER (PRESSURE GAUGE): The gas control outlet pressure should match the manifold pressure listed on the appliance nameplate. 0000062529 00000 n Check the regulator setting either with a manometer or by clocking the gas meter. Do not bend pilot tubing at gas control or pilot burner after compression fitting has been tightened, or gas leakage at the connection may result. 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! TRADELINE MODELSTRADELINE models are selected and packaged to provide ease of stocking, ease of handling and maximum replacement value. 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. To check for gas pipe leaks, put soap on the pipe connecting to the valve, if it bubbles, it means there's leakage. The gas valve part numbe read more 0000027628 00000 n pressure drop for straight-through configuration). Support horizontal pipes every 3 (91 cm) with metal pipe straps. 0 Force or attempted repair may result in fire or explosion. This valve is only for vent free applications. How to tell which packages are held back due to phased updates, Short story taking place on a toroidal planet or moon involving flying. Thermostat and gas control main burner gas flow.NOTE: Gas controls are shipped with the gas control knob in the ON position. 0000011836 00000 n If outlet pressure begins to rise, the pressure regulator the diaphragm moves slightly higher, allowing less gas flow to the gas control outlet. CONVENIENCE TERMINALS SERVE AS A TIE POINT ONLY. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. first the 360 millivolts you show should have been 750 to 800 millivolts since this is a pilot generator. 0000009803 00000 n 0000016758 00000 n Why are physically impossible and logically impossible concepts considered separate in terms of probability? WHEN THE CALL FOR HEAT ENDSWhen the call for heat ends, the first automatic valve and the second automatic valve operator close, bypassing the regulator(s) and hutting ff the main burner. Below are my tests: 0000005616 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! Zero clearance sleeve is required only for combustible walls. 0000137823 00000 n (supposedly so they could fix them :yes: ), Cool. 0000002780 00000 n If it is, simply replace the igniter/flame rod assembly. The servo pressure regulator monitors outlet pressure to provide n even the main burner gas flow. 54), whichever applies. The gas valve cannot be repaired in the field. . So, to diagnose a gas valve, first check to see if the pilot light is on. If it isn't flowing, replace the SmartValve. Disconnect power supply before wiring to prevent electrical shock or equipment damage. 0000002778 00000 n 30 0 obj <>/Filter/FlateDecode/ID[<07B8336975034BD12756FE90D2FD37D3>]/Index[10 37]/Info 9 0 R/Length 96/Prev 25390/Root 11 0 R/Size 47/Type/XRef/W[1 2 1]>>stream When the thermostat calls for heat, the first automatic valve and the second automatic valve operator open. Using Kolmogorov complexity to measure difficulty of problems? 12Wiring connections for 120-volt control. 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. The minimumregulated capacity is 40 feet 3 /hour for propane. In many such applications, particularly commercial cooking, the equipment operates 100,000-200,000 cycles per year. 0000008225 00000 n If outlet pressure begins to fall, the pressure regulator diaphragm moves slightly lower allowing ore to flow to the gas control outlet. 0000057714 00000 n WARNING!FIRE OR EXPLOSION HAZARDS CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY OR DEATH.Do not disassemble the gas control; it contains no replaceable components. TROUBLESHOOTING MILLIVOLT GAS VALVES Part # 023625 (natural) & 023624 (LP) TH TP TH TP MILLIVOLT CONTROL VALVE To check Resistance of the gas valve, connect one wire to the valve as shown. We come out with new videos every few days from my job sites, service calls, and the training shop! In this HVAC Furnace Video, I go over the Operation and Troubleshooting of a 750 Millivolt Gas Valve and Thermopile/PowerPile. To learn more, see our tips on writing great answers. Some considerations are: Cycling frequency. It must measure at least 19.5VAC with the igniter powered. What you are experiencing is why such adjustments are discouraged! The Fora platform includes forum software by XenForo. The pilot light is auto so when the thermostat calls for heat, a spark is sent to the ignition lighting up the pilot. 0000003926 00000 n 0000031335 00000 n The boiler comes on twice a day - morning and night. A separate reset button must be held down to permit gas flow while lighting the pilot; can be pushed down only in the PILOT position. Thanks. Good reading is 0 to 0.2 Ohms . 0000139236 00000 n 0000002263 00000 n Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Exposure to water, dirt, chemicals, and heat can damage the gas control and shut down the control system. This wiring should reduce to a simple series circuit: a gas valve coil in series with a thermopile in series with a t'stat with normally open contacts in series with a limit switch with normally closed contacts. 0000016504 00000 n 0000039877 00000 n The condition of the wiring is also suspect; loose connections, old oxidized control contacts, an old thermostat, are all potential problems. Good info, thanks! 4 0 obj <> endobj When the pilot goes out or becomes too small to sustain normal ignition. 0000012695 00000 n wc [0.9 kPa] outlet pressure). See Fig. 0000019943 00000 n 0000026083 00000 n This behaviour is consistent with what I have seen/heard when the Honeywell valves begin to fail. Also found in certain gas space heaters and construction-site portable heaters. They require the use of a 750 mv Powerpile generator (thermopile). Adjust the thermostat several degrees higher than your current room temperature. Carefully check the main burner light off at the step pressure. 0000012011 00000 n 0000004324 00000 n Thanks for contributing an answer to Home Improvement Stack Exchange! Vermont Castings, Majestic Products: DVR33, Window Frame Assembly Should be Removed Before Service Work, Troubleshooting Honeywell Millivolt Valve, Homeowner's Installation and Operating Manual. The Honeywell Home trademark is used under license from Honeywell International Inc. . If the gas control knob or reset button will not operate by hand, or if the reset button stays depressed after it is released, the gas control should be replaced by a qualified service technician. 0000003581 00000 n https://www.trutechtools.com/?affid=43 Use our Promo Code: \"acservicetech\" for 8% off your order! If the knob or reset button will not operate by hand, replace the control using a qualified service technician. WHEN THE THERMOSTAT CALLS FOR HEATThe gas control allows pilot and main burner gas flow during the thermostat ON cycle, as shown in Fig. TABLE 5MAXIMUM LENGTH OF SUPPLEMENTARY LIMIT LEAD WIRES WHEN USING Q340A THERMOCOUPLE. JavaScript is disabled. )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. 0000010874 00000 n 0000001377 00000 n 0000011088 00000 n This is a legacy product document supported by Resideo.This product is no longer manufactured. Use new, properly reamed pipe free from chips. 0000055306 00000 n MILLIVOLT SYSTEMS Millivolt systems provide their own power, so do not require outside battery power or line voltage to operate. Any adjustments to gas control equipment should be checked using combustion efficiency test equipment by trained technicians. 0000039900 00000 n Ensure the main burner lights smoothly and without a flashback to the orifice and that all ports remain lit. Set your voltmeter for the proper voltage that is, above 24 volts. The low-pressureregulator maintains outlet pressure at the preset step rate for several seconds. Gas valves nowadays are one piece with 100% shutoff for the pilot flame gas and shutoff valve etc all in one valve. Refer to the Adjust the Pilot Burner Flame section. 0000017038 00000 n 0000001836 00000 n Assure thermocouple connection to the power unit is tightened 1/4 turn beyond finger tight. Use only your hand to push down the reset button or turn the gas control knob. When installing the appliance as a rear vent unit, the 90. the manual gas control knob is in the ON position. 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. 0 0000139520 00000 n Connect control circuit to gas control terminals. The first automatic valve opens, and the second automatic valve operator valve disc is lifted off its seal. In the "Resources for understanding gas valves" thread in the HVAC forum, someone wanted to know how a gas valve worked. As for the gas valve it is probably a "general controls" valve but any 800 millivolt gas valve can be used as a replacement. Does that indicate more a gas valve problem or a thermopile generator/pilot flame problem? TABLE 7PRESSURE REGULATOR SPECIFICATION PRESSURES IN INCHES WC. 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. If something is wrong with the internal components of the gas valve, the gas valve should be replaced. Check the pilot burner flame adjustment. Some tips regarding the Honeywell Millivolt valve: Always ensure the switch is in the off position when lighting the pilot. 46 0 obj <>stream If you don't test, it's just a. The small valve seat attached to the reset button closes and shuts off the pilot gas flow. I suspect they are the "white" terminal and TH1. It is no longer manufactured Pressure Switch Installation Addendum, Gas Detection Quick Reference GuideHoneywell BW Solo Portable Single gas Detector 2020, Oct 23 G05-4001-000-RevC Overview Contact, RYOBI RY802925 PSI Gas Pressure Washer WARNING: This Quick Reference Guide is not a substitute for reading the, KitchenAid Gas Range User Manual - Optimized PDF KitchenAid Gas Range User Manual - Original PDF, Your email address will not be published. Did this satellite streak past the Hubble Space Telescope so close that it was out of focus? 0000049205 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]. The internal valve coil must then be connected to the topmost and bottommost of the four terminals. When the gas control knob is manually turned to OFF. Do not remove the existing window frame assembly. 15. When the thermostat calls for heat, the automatic operator valve disc opens. Readjust the full rate outlet pressure if necessary to improve light off characteristics. For your safety, read the following warnings before lighting the appliance: WARNING: BEFORE DOING ANY GAS CONTROL SERVICE WORK, REMOVE GLASS FRONT. 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. 0000019920 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. Remove seals over gas control inlet and outlet if necessary. To ensure proper operation, follow these guidelines: Locate the gas control in the appliance vestibule on the gas manifold. See Fig. Turn the pressure regulator adjustment screw clockwise. 0000005594 00000 n Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from any purchases after clicking through. endstream endobj 11 0 obj <> endobj 12 0 obj <> endobj 13 0 obj <>stream One Q340A 36-inch thermocouple with adapters and clip. Models for natural or LPgas.ADDITIONAL FEATURES: STANDARD MODELSMODEL: VR8200 and VR4200 Continuous Pilot Dual Automatic Valve Combination Gas Controls. Failure to follow them could damage the product or cause a hazardous condition. CONVERTING BETWEEN NATURAL AND LP GAS WARNING!FIRE OR EXPLOSION HAZARDS CAN CAUSE PROPERTY DAMAGE, SEVERE INJURY, OR DEATH. 0000016105 00000 n When making the conversion, the main pilot burner orifices must be changed to meet the appliance manufacturer specifications. A bad gas valve in a Honeywell appliance such as a water heater or furnace that is powered by natural gas can go bad and affect the performance of the unit. This shuts off the pilot and main burner gas flow. This is an electrical connection and must be clean and dry. 00. IF THE PILOT BURNER FLAME GOES OUT WHEN THE GAS CONTROL KNOB IS RELEASED, IF THE MAIN BURNER WILL NOT COME ON WITH A CALL FOR HEAT. This includes a WIRING DIAGRAM. 0000012806 00000 n These Videos are all part of our Training Series on HVACR Service, Installation, Preventative Maintenance, General Knowledge, and Tips. Natural to LP gas conversion kit included with TRADELINE standard and slow-opening models. (supposedly so they could fix them :yes: ). Refer to Figs. Order number, SUPER TRADELINE or TRADELINE if desired. I have some pictures to help clarify what I have, a ThermoPILE system. ADJUST THE PILOT BURNER FLAMEThe pilot flame should envelop 3/8 to 1/2 in. There must be two terminals in this connector block that powers the gas valve coil. 0000005081 00000 n Mount the gas control so gas flow is in the direction of the arrow on the bottom of the gas control. This may burn out the heat anticipator in the thermostat. 0000012919 00000 n 394349 9/64 inch hex tool for flange assembly screws. Asking for help, clarification, or responding to other answers. Check the ratings given in the instructions and on the product to ensure the product is suitable for your application. For push-in clip-type pilot burners: From beneath, insert the tip of the Q340 into the hole or barrel of the pilot burner. 0000028628 00000 n What is a word for the arcane equivalent of a monastery? 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. I recommend you call a heating expert. The OFF position prevents pilot and main burner gas flow. Mutually exclusive execution using std::atomic? Where these instructions differ from the appliance manufacturer, follow the appliance manufacturer instructions.All wiring including 1/4 in. This includes a WIRING DIAGRAM. 14 when the: The power unit holds the safety shutoff valve disc off its seat, so gas can flow into the control. GAS CONTROL KNOB SETTINGSThe gas control knob has three settings:OFF: Prevents pilot and main burner gas flow.PILOT: Permits pilot gas flow only. The gas control knob is hard to turn or push down, or it fails to pop back up when released. Solenoid-operated first automatic valve opens on thermostat call for heat and closes when the call for heat ends. 0000026455 00000 n You should NOT short out the t'stat terminals to check it. The Thermopile, energized by the pilot flame, generates sufficient power to operate the gas valve and on/off switch. 0000028651 00000 n 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. Allow the appliance to run through one complete cycle to ensure that the controls are functioning in the correct manner. Check if gas is flowing if you turn on the gas and the pilot burner doesn't light. The three-position manual gas control knob has ON, OFF, and PILOT positions. I go over how it is Wired, wha. This decreases gas pressure under the second automatic valve diaphragm and repositions the valve disc further from the seat. 0000043015 00000 n Water heater not working? Turn the gas control knob counterclockwise. hb``Pc`` _Ps400! You are using an out of date browser. Yes, this shows the pilot gen. in series with the limit switch in series with the t'stat. PRESSURE TAPPING: Inlet and outlet pressure taps accessible from the top of gas control. Adjustable servo regulator effectively maintains almost constant gas output pressure under wide fluctuation in gas supply pressure. 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. Check the transformer. Locate the hot surface igniter and look for a spark or glow there. The VS8421 Millivolt Gas Valve has a 60,000 Btuh capacity (1 in. Never use any tools. DO NOT JUMPER THESE TERMINALS. Otherwise, take the necessary steps to provide proper gas pressure to the gas control. hW[o8+ID:BZ(gENRCD'$( m;\{fgc3llFQl%|xI!>-88zzhb|AtJOr[b4-BFS! Refer to Fig. Is a PhD visitor considered as a visiting scholar? Light the main burner. Turn off the main gas supply to the appliance. wc [0 kPa] to rated output pressure within 3-6 seconds (for an 80,000 Btuh furnace at 7 in. Both pilot and main burner are shut off. Avoid locating gas control where exposure to corrosive chemical fumes or dripping water are likely. If it is re-energized within 60 seconds, it may bypass or shorten the length of the low-pressure step. Therefore, this unit may not exactly match the listed specifications. Straight-through body pattern; right-angle adapters available for inlet and outlet. 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honeywell millivolt gas valve troubleshooting 2023