valutazioni - 2, GPA: 4
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Facilità d'uso
Current rating: 0.2 A. Valve contact ratings (at 24 Vac): Run Inrush Pilot 1.0 A 10.0 A Main 1.0 A 10.0 A SPARK GENERATOR OUTPUT: 13kV peak at 25 pf load. THERMOSTATANTICIPATOR SETTING: 0.2 Aplus pilot valve rating plus main valve rating. THERMOSTAT COMPATIBILITY: Standard models compatible with all open-close switch type 24 Vac thermostats capable of supplying rated voltage and current to the module. AMBIENT TEMPERATURE RATING: Minus 40 F to plus 175 F (minus 40 C to plus 79 C). RELATIVE HUMIDITY RATING: 5 to 90 percent RH at 95 F. FLAME FAILURE RESPONSE TIME: 0.8 seconds at 1.0 uA flame current. FLAME CURRENT: 1 uA, min. CHECKOUT Check out the gas control system: 1. At initial installation of the appliance. 2. As part of regular maintenance procedures. 3. As the first step in troubleshooting. 4. Any time work is done on the system. STEP 1: Perform Visual Inspection. A. With power off, make sure all wiring connections are clean and tight. B. Turn on power to appliance and ignition module. C. Open manual shutoff valves in the gas line to the appliance. D. Do gas leak test ahead of gas control if piping has been disturbed. Gas Leak Test: Paint pipe joints with rich soap and water solution. Bubbles indicate gas leak. Tighten joints to stop leak. STEP 2: Review Normal Operating Sequence and Module Specifications. STEP 3: Reset the Module. A. Turn the thermostat to its lowest setting. B. Wait one minute. As you do Steps 4 and 5, watch for points where operation deviates from normal. Refer to Troubleshooting Chart to correct problem. STEP 4: Check Safety Lockout Operation. A. Turn gas supply off. B. Set thermostat above room temperature to call for heat. C. Watch for spark at pilot burner. D. Time length of spark operation. Maximum spark time is 90 seconds. E. Open manual gas cock and make sure no gas is flowing to pilot or main burner. F. Set thermostat below room temperature and wait one minute before continuing. STEP 5: Check Normal Operation. A. Set thermostat above room temperature to call for heat. B. Make sure pilot lights smoothly when gas reaches the pilot burner. C. Makesuremainburnerlightssmoothlywithoutflashback. Make sure burner operates smoothly without floating or lifting. D. If gas line has been disturbed, complete gas leak test. Gas leak test: Paint gas control gasket edges and all pipe connections downstream of gas control, including pilot tubing connections,withrichsoapandwatersolution. Bubblesindicate gas leaks. Tighten joints and screws or replace component to stop gas leak. E. Turn thermostat below room temperature. Make sure main burner and pilot flames go out. OPERATION Module operation can be conveniently divided into two phases for S8600H. The phases are trial for ignition and main burner operation. TRIAL FOR IGNITION Pilot Ignition Following call for heat (system start on S8600H), the module energizes the first main valve operator. The first main valve opens, which allows gas to flow to the pilot burner. At the same time, the electronic spark generator in the module produces a 13,000 volt spark pulse output (at 25 pf load). The voltage generates a spark at the igniter-sensor that lights the pilot. If the pilot does not light, or the pilot flame current is not at least 1.0 uA and steady, the module will not energize the second main valve and the main burner will not light. 17375-10-0706 Page 37 INTERMITTENT PILOT TROUBLESHOOTING Safety Lockout S8600H provides 100 percent shutoff, or safety lockout. A timer starts timing the moment the trial for ignition starts. Ignition spark continues only until the timed trial for ignition period ends. Then the module goes into safety lockout. Lockout de-energizes the first main valve operator and closes the first main valve in the gas control, stopping pilot gas flow. The control system must be reset by setting the thermostat below room temperature for one minute or by turning off power to the module for one minute. Main Burner Operation When the pilot flame is established, a flame rectification circuit is completed between the sensor and burner ground. The flame sensing circuit in the module detects the flame current, shuts off the spark generator and energizes the second main valve operator. The second main valve opens and gas flows to the main burner, where it is ignited by the pilot burner. The flame current also holds the safety lockout timer in the reset (normal) operating condition. When the call for heat ends, both main valve operators are de-energized, and both main valves in the gas control close. CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. S8600H NORMAL OPERATING SEQUENCE START STAGE 1 Trial for Ignition SparkGeneratorPoweredFirstValve(Pilot) OperatorOpensPilotburnerlights. Modulesensesflamecurrent. PILOTBURNEROPERATIONPilotburnerdoesnotlightThermostat,WallSwitch, Remote,Etc.CallsforHeatPOWERINTERRUPTIONSystemshut...
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