Thus the flow of gas through the second automatic valve is reduced, and outlet pressure falls to the desired level. Combination 1/4 inch quick-connect and screw terminals (includes convenience terminals). Connect the other end of the tubing to the pilot burner according to pilot burner manufacturer instructions. Adjust the thermostat several degrees above room temperature. Use conversion factors in Table 2 to convert to capacities for other gases. Good reading is 0 to 0.2 Ohms . 5. In many such applications, particularly commercial cooking, the equipment operates 100,000-200,000 cycles per year. 0000004302 00000 n Robertshaw 710-502 Millivolt Low Capacity Gas Valve, 1/2" x 1/2 The problem I'm having is very simple. 0000012919 00000 n Failure to follow them could damage the product or cause a hazardous condition. )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. Oa$2vlmmpTx{>z)~pc|N*ona0 Locate gas control in a well-ventilated area. hb``Pc`` _Ps400! startxref Troubleshooting Honeywell Millivolt Valve, Troubleshooting the Gas Control System, Troubleshooting the Gas Control System, Vermont Castings, Majestic Products: DVR33, SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION Loss of power closes the automatic valves, but leaves the pilot lit, ready to return to normal service when power is restored. The main burner should go off and the pilot should remain lit. If necessary, adjust the pressure regulator to match the appliance rating. 0000060666 00000 n The electrical/scientific basis for millivolt systems is the Seebeck If outlet pressure begins to rise, the pressure regulator the diaphragm moves slightly higher, allowing less gas flow to the gas control outlet. Hold down the gas control knob about one minute, then release. Remove the regulator cap screw and pressure regulator adjusting screw. So, to diagnose a gas valve, first check to see if the pilot light is on. Tech Guru. 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. Any adjustments to gas control equipment should be checked using combustion efficiency test equipment by trained technicians. Contact your Honeywell sales representative to request a gas valve with corrosion-resistant construction. 0000002119 00000 n 54), whichever applies. Use new, properly reamed pipe free from chips. If you'd like to support the site, please allow ads. inlet and 1/2 inch outlet; adapters available for 3/8 or 3/4 inch. https://www.trutechtools.com/?affid=43 Use our Promo Code: \"acservicetech\" for 8% off your order! 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. Assure the main gas supply valve is open and the pilot gas supply line is purged of air. Refer to Startup and Checkout section. Attempt to light pilot burner flame following procedures in the Light the Pilot Burner Flame section. For the battery test above only connect the battery for a second or two just to see if the gas valve works. 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. Thread pipe into gas control. 0000098789 00000 n 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. I recommend you call a heating expert. 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. 0000126162 00000 n 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. 0000137823 00000 n 0000034533 00000 n Force or attempted repair may result in fire or explosion. If outlet pressure begins to fall, the pressure regulator diaphragm moves slightly lower allowing ore to flow to the gas control outlet. *If higher than 35mv check connections and switch. Refer to the Adjust the Pilot Burner Flame section. Open the manual gas switch if the gas valve fails to operate and look to see if gas is flowing to the main burner or pilot. Square off and remove burrs from the end of the tubing. Hunker may earn compensation through affiliate links in this story. One more troubleshooting tip, on a residential gas furnace if a gas valve is not "clicking" meaning it's apparently not receiving 24 volts you can jump directly off of the control board using the R and the C terminals, R to one terminal on gas valve and C to the other terminal on gas valve (or wherever else you can retain 24 volts from) to the gas valve. %PDF-1.3 % EASY FIXES! Do NOT use Teflon tape. All adjustments, wiring connections, and pilot outlets are accessible from the top of the gas control. 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 show you how to Light the Pilot and Power the Main Burner! Thermostat and gas control main burner gas flow.NOTE: Gas controls are shipped with the gas control knob in the ON position. The pilot light is auto so when the thermostat calls for heat, a spark is sent to the ignition lighting up the pilot. This product was the perfect replacement for the Honeywell thermopile in a circa 1975 gas fireplace unit. PDF Gas valves with ods pilots, thermocouples and thermopiles - Desa Tech As with the millivolt system, you'll be testing a series of components to locate the faulty part. Check the power supply rating on the valve and make sure it matches the available supply. 0000023567 00000 n Pilot gas flows through a port in the ushing around the reset button shaft to the pilot burner. The gas control must be manually reset. The PILOT position allows pilot burner gas flow only. Bashing my head against the walls in some of the internet's finest chat rooms. Insert the replacement spring with the tapered end down. You may have to wiggle it a bit before it comes loose. For the VR4200, when the gas control is installed external to the appliance, install the conduit cover on the conduit fitting. I go over how it is Wired, wha. 0000001317 00000 n JavaScript is disabled. Set thermostat to the desired temperature. Ensure the O-ring is fitted into the groove of the flange. Dusty, wet, or corrosive environment. Usually this problem can be resolved by using an adapter. With the loss of outlet pressure, the second automatic valve closes and is held closed by spring pressure on the diaphragm. 0000126186 00000 n Replace the part if the gas leak cannot be stopped. The diaphragm-operated second automatic valve opens under the control of the regulator and closes if gas or power supply is interrupted. 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. 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. Gas valve troubleshooting looks for a problem. The OFF position prevents pilot and main burner gas flow. 750 Millivolt Gas Valve, Thermopile Wiring & Wiring Diagram! 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. Test the voltage using an AC voltmeter. Install the new plastic pressure regulator adjustment screw so that the top of the screw is flush (level) with the top of the regulator. 0000016758 00000 n Lv 4. Do not try to light any appliance. I'll show you how to troubleshoot and diagnose the problem with your water heater and Honeywell gas val. The pilot must be manually relit when normal burner operation is desired. 0000017288 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. See Accessories.CAPACITY: 130 feet 3 /hour [4.2 meters 3 /hour]. If something is wrong with the internal components of the gas valve, the gas valve should be replaced. 0000016083 00000 n On LP gas installation, use compound resistant to LP gas. It looks like this: the thermopile is a generatorputs out up to 400 MV. (50/60 Hz models available on request. 0000011088 00000 n See Fig. Millivolt systems have been the industry standard for decades, and are in some ways simpler to troubleshoot than electronic ignition systems. 0000049205 00000 n Taps are 1/8 inch NPT with a plug containing recess for 3/16 inch Allen wrench.PRESSURE RATING: A.G.A. Straight-through body pattern; right-angle adapters available for inlet and outlet. ,[Uw-GTk`{LvG*!1li$:,nZeQh.i&. Both should be under cap screws. This behaviour is consistent with what I have seen/heard when the Honeywell valves begin to fail. 0000049228 00000 n Install thermostat, and other controls as required. Push and hold down the red reset button (Figs. Solenoid-operated first automatic valve opens on thermostat call for heat and closes when the call for heat ends. 0000011989 00000 n 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. Capacity rated at 130 feet 3 /hour at 1-inch WC pressure drop [3.7 m 3 /hr at 0.25 kPa]. 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. The pilot works fine but the main burner does not come on by the wall mounted thermostat or the manual on/off switch. Turn off the main gas supply to the appliance. Otherwise, take the necessary steps to provide proper gas pressure to the gas control. 1. Standard Opening Pressure Regulation (VR8200A,M, and VR4200A, M)During the ON cycle, the servo pressure regulator provides close control of outlet pressure, even if inlet pressure and flow rate vary widely. They require the use of a 750 mv Powerpile generator (thermopile). . When the thermostat calls for eat, the first automatic valve and the second automatic valve operator are energized. Always install sediment trap in gas supply line to prevent contamination of gas control. Minimum regulated capacity is 20 feet 3 /hour [0.6 meters 3 /hour].