American Dryer Corp ADG-530 Introduction, HOT Surface Ignition HSI System COMPONENTS/FUNCTIONS

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. (light emitting diode)

∙Automatic reset one (1) hour after lockout

∙Multiple tries

∙Custom pre-purge and inter-purge timing

∙Remote and local sensing

∙Flame sense test pins

∙Software conforms to “UL 1998” requirements

∙Design certified to ANSI Z21.20 and CAN/CSA C22.2 No. 199-M89

B.GENERAL SYSTEM INFORMATION

1.HOT SURFACE IGNITION (HSI) SYSTEM COMPONENTS/FUNCTIONS:

a.The HSI MODULE is designed to be the “controller” of the HSI system. When activated by the dryer’s controls, this module constantly monitors and controls the functions of the

HSI system (i.e., ignitor activation, gas valve on/off functions, flame verification, etc.), can be operated at either 50 Hz or 60 Hz; and has self diagnostic capabilities.

The L.E.D. (indicator light) on the HSI module simplifies the troubleshooting procedure in the event of a fault within the HSI system. If the LED on the HSI module does not blink constantly, then the system is functioning properly. A “red” L.E.D. (LOCKOUT MODE) indicates that ignition flame has not been confirmed. Refer to the TROUBLESHOOTING SECTION of this manual for specific diagnostic information.

1) Failure To Light - LOCKOUT

Hot Surface Ignition (HSI) Module

a)Should the main burner fail to light, or if a flame is not detected during the first trial for ignition period, the gas valve is de-energized and the HSI module goes through an inter-purge delay before another ignition attempt. The control will attempt two (2) additional ignition trials before going into LOCKOUT and the gas valve will be de-energized immediately.

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