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ADG-530
Hot Surface Ignition (HSI) System
Technical Manual
American Dryer Corporation
88 Currant Road
Fall River MA 02720-4781
Telephone: (508) 678-9000 / Fax: (508) 678-9447
E-mail: techsupport@amdry.com
ADC Part No. 450401
032197MFM/abe
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Retain This Manual In A Safe Place For Future Reference American Dryer Corporation products embody advanced concepts in engineering, design, and safety. If this product is properly maintained, it will provide many years of safe, efficient, and trouble-free operation. ONLY properly licensed technicians should service this equipment. OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the installation/operator's manual included with the dryer. THE HSI MODULE IS NOT FIELD REP
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GAS HOT SURFACE IGNITION (HSI) SYSTEM MODEL TRITON 2465 (ADC Part No. 128974) 50/60 Hz TYPE ONLY PRODUCT INFORMATION and TROUBLESHOOTING GUIDE ALL instructions and information included in this NOTE: Failure to read and follow manual carefully before operating and/or servicing this system, COULD CAUSE PERSONAL INJURY and/or PROPERTY DAMAGE. IMPORTANT: We have tried to make this manual as complete as possible and hope you will find it useful. However, since the time of this printing, some info
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A. INTRODUCTION The Hot Surface Ignition (HSI) System operates at 24 VAC and is a discrete component based gas ignition control (HSI module) system which utilizes a Hot Surface Ignitor as an ignition source. Safe proof of flame is accomplished through flame rectification. The HSI module has a diagnostic LED (light emitting diode) indicating light which simplifies troubleshooting in the event of a fault. Other Features... • 24 VAC microprocessor based HSI control • System diagnostic L.E.D. (ligh
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(1) Recovery from LOCKOUT requires a manual reset by either resetting the thermostat or removing the 24 VAC from the HSI module for a period of five (5) seconds. (2) If the microprocessor (computer) is still calling for heat after one (1) hour, the HSI module will automatically reset and attempt to ignite the burner again. 2) Flame Failure Reignition a) If the established flame signal is lost while the burner is operating, the HSI module will respond within 0.8 seconds. The gas valve is de-ene
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c. The HOT SURFACE IGNITOR/FLAME SENSOR ASSEMBLY is located in the burner flame area and is used to ignite the gas by the use of a HOT SURFACE IGNITOR. To provide feedback information to the HSI module a FLAME SENSOR is used to determine whether the burner flame is evident (on). The HOT SURFACE IGNITOR is a silicon carbide ignitor that upon application of 24 VAC will glow bright orange for the inter-purge time period. The proper location of the silicon carbide ignitor is very important to achi
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2. SYSTEM (basic) ELECTRICAL RATINGS/SPECIFICATIONS INPUT POWER CONTROL: 18-30 VAC 50/60 Hz INPUT CURRENT DRAIN 300 mA @ 24 VAC with GAS VALVE RELAY ENERGIZED (control only) GAS VALVE RATING 2.0A @ 24 VAC OPERATING TEMPERATURE 0 °F (fahreheit) to 160 °F (fahreheit) 0 °C (celsius) to 71 °C (celsius) FLAME SENSITIVITY .7µA minimum FLAME FAILURE RESPONSE TIME 0.8 seconds maximum TYPE of GASES NATURAL, L.P. (liquid propane), or manufactured SIZE (length x width x height) 4.23 x 3.23 x 1.63
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f. The Hot Surface Ignitor will turn on and after approximately four (4) seconds the Hot Surface Ignitor will shut off. The Gas Valve will be energized and a burner flame should be evident for approximately severn (7) seconds and then shut off. g. The HSI Module will attempt two (2) additional ignition trials after which the HSI Module will LOCKOUT and the red indicator light will flash 3 blinks, wait one (1) second, and then keep flashing 3 blinks continuously until the HSI Module is reset m
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3. NORMAL OPERATION (summary) When a signal is received from the thermostat supplying 24 volts to the W terminal of the HSI module, the control will reset, perform a self check routine, flash the diagnostic L.E.D. for up to four (4) seconds and a pre-purge delay begins. Following the inter-purge period, the Hot Surface Ignitor is activated and the Gas Valve is energized for the trial for ignition period. When a flame is detected during the trial for ignition, the Hot Surface Ignitor is deactiv
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TEST EQUIPMENT The following pieces of test equipment will be required to troubleshoot this system with minimal time and effort. MANOMETER Used to measure gas pressure in inches of water column (W.C.) Available from ADC - Part No. 122804 MULTIMETER/VOLTMETER For measuring voltage and/or amperage 1. HSI (Hot Surface Ignition) TROUBLESHOOTING TERMS (definitions) a. INTERNAL CONTROL FAILURE - HSI module red L.E.D. (light emitting diode) indicator light stays on continuously. This indicates 8
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f. FLAME SENSOR FAULT - if there is a problem/fault within the flame sensing circuit or the Flame Probe, the red L.E.D. (light emitting diode) indicator light flashes 2 blinks (i.e., FLAME SENSOR FAULT) continuously until the problem/fault is corrected (fixed) or until the HSI Module is reset manually. 2. TROUBLESHOOTING/SYSTEM DIAGNOSIS (detailed) TROUBLESHOOTING (Service Checks) SYMPTOM Cause 1. NO L.E.D. INDICATOR LIGHT A. MISWIRED B. TRANSFORMER BAD (24 volts) C. FUSE/CIRCUIT BREAKER BAD D
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b) Start the dryer ... with the burner on, the correct water column (W.C.) reading in inches should be: Natural Gas ........................................ 3.5 - 4 inches W.C. L.P. (liquid propane) Gas .................. 10.5 - 11 inches W.C. When a gas dryer is first started (during initial time of installation/start-up), it has a tendency not to ignite on the first ignition attempt. This is due to the fact that the gas supply piping is filled with air, so it may take a few minutes for the a
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c) Flame Failure Reignition If the established flame signal is lost while the burner is operating, the HSI module (controller) will respond within 0.8 seconds. The gas valve will be de-energized, the HSI module resets and starts a new ignition sequence in an attempt to relight the burner. If the burner does not light, the HSI module will de-energize the gas valve. The HSI module will make two (2) more attempts to relight the burner. If the burner does not relight the HSI module will go into
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4) HSI (Hot Surface Ignition) 24 VAC Transformer The HSI transformer is designed to step down the operating voltage of the dryer to 24 VAC to operate the HSI module. This transformer, like all transformers, is two (2) sided: a) Primary Side This is the incoming voltage side - 120 VAC, 208 VAC, 240 VAC - of transformer. b) Secondary Side This is the step down side - 24 VAC - of the transformer. WARNING: 208 VAC and 230/240 VAC ARE NOT THE SAME. ALL voltage connections should be checked and conf
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4) HSI (Hot Surface Ignition) 24 VAC Redundant Gas Valve IMPORTANT: The HSI 24 VAC Redundant Gas Valve contain no serviceable parts. REPLACEMENT COILS ARE NOT AVAILABLE. IMPORTANT: THERE ARE NO PARTS AVAILABLE FOR FIELD REPAIR. Replace gas valve only with exact model and/or type number as noted on gas valve. a) The redundant gas valve utilize 24 VAC, which is provided by the HSI module. (1) To check the resistance value; (a) Disconnect the terminations at the gas valve from the HSI module. WARN
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E. PARTS LIST (basic) When ordering replacement parts from the factory, please specify model number and serial number in addition to the part number and part description of the dryer so that your order can be processed accurately and promptly. The information and illustrations listed here may not depict your particular dryer/part exactly. This information and/or illustrations are a composite of the HSI SYSTEM. Be sure to check the part description thoroughly before ordering any part. ADC D ES
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HSI (Hot Surface Ignition) SYSTEM COMPONENTS Hot Surface Ignition (HSI) Module Upshot Burner Tube with 36E Hot Surface Ignitor (HSI)/Flame Sensor 24 VAC Redundant Gas Valve Assembly 24 VAC Transformer 15
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ADC 450401 1-05/20/97-50 2-02/25/98-50
