White Rodgers 21V51U-843 Catalog Page
Contents
1. HEATING TWO STAGE INTEGRATED VARIABLE SPEED ECM l UNIVERSAL HSI FURNACE CONTROL White Rodgers REPLACEMENT 21V51U 843 UNIVERSAL INTEGRATED HSI FURNACE CONTROL KIT Replaces White Rodgers 50V51 XXX s and 50V61 XXX s Two Stage HSI Systems with 80V or 120V Ignitors FEATURES e 16 pin variable speed circulator output for ECM Electronically Commutated Motor dipswitch selectable for OEM applications two speed inducer output two stage gas sates tii valve output arth e Pushbutton fault history retrieval e Furnace status LED tri color green red and amber e Heat fan off delay dipswitch selectable fan on delay for cooling e Auto second stage delay dipswitch selectable e 120 VAC humidifier output 120 VAC electronic air cleaner output SPECIFICATIONS Electrical Rating Input Voltage nananana anaana 24 VAC 60 Hz Class II transformer required Nom Input Current 24 VAC 595 mA MV Relay Load Ratings Gas Valve Relays 1 5 amps 24 VAC 60 Hz Inducer Relays 2 2 FLA 3 5 LRA 120 VAC Humidifier Load 1 0 amp max 120 VAC Electronic Air Cleaner Load 1 0 amp max 120 VAC Ignitor Relay cds e eae Swe ad 4 0 amps max 132 VAC 60 Hz Flame Current Requirements Minimum current to insure flame detection 0 3 ua DC Maximum current for non detection 0 1 ua DC Maximum allowable leakage resistance 100 M ohms Measured with2. a DC microameter in the flame probe lead Operating Temperature Range 40 to 175 F 40 to 80 C Humidity Range 5 to 93 relative humidity non condensing Flame Failure Response Time 2 0 sec max 60Hz AINO ESAS TECHNICAL HELP Includes Ta Wiring Diagram Operation See pages 181 182 e Module PAGES 181 182 Ais Heat Cool Cool Automatic gni Or NI Model Ignitor Delay to Heat Delay Delay to Delay to Reset e Wiring Harness Number Pre Purge Warm Up FanON toFanOFF FanON FanOFF Time 21V51U 843 30120150180 5 60 60 minutes CROSS REFERENCE 21V51U 843 Replaces 18M9901 21V51U 843 50V51 507 21V51U 843 CNT 04018 21V51U 843 20300002 21V51U 843 50V61 120 21V51U 843 CNT 04352 21V51U 843 20300004 21V51U 843 50V61 143 21V51U 843 CNT03078 21V51U 843 50V61 507 50V51 290 21V51U 843 21V51U 843 21V51U 843 46 www white rodgers com
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