White Rogers Universal Two-stage HSI Integrated Igniter and Module Furnace Control Kit 21M51U-843 Includes:€¢ Module €¢ Ignitor Kit FEATURES €¢ 120 VAC 3-speed PSC (Permanent Split Capacitor) circulator output, two-speed inducer output, 2-stage gas valve output. €¢ Pushbutton fault history retrieval. €¢ Furnace status LED €“ tri-color (green, red and amber). €¢ Heat fan off delay (dipswitch selectable), fan on delay for cooling. €¢ Auto second stage delay (dipswitch selectable). €¢ 120 VAC humidifier output/120 VAC electronic air cleaner output. 21M51U-843 Cross Reference Application Data Lennox 18M3401, 46M9901, 50M61-120, 83L9301, - Must Use 21D64-2* Goodman 20300001 20300003 - Must Use 21D64-2* Coleman / Evcon / Luxaire / York 50M51-242 Use existing or 21D64-2 Amana/Goodman 50M61-288, 50M61-289 - Must Use 21D64-2* American Standard/Trane 50M61-495 - Must Use 21D64-2* White-Rodgers Standard 50M61-843 - Must Use 21D64-2* Trane CNT03077, X13650839010 Note: The Installer may have to modify existing ignitor hole to accommodate the new 21D64-2, with ceramic diameter (.394€). *21D64-2 Ignitor Note: In these applications, the existing 80V igniter must be replaced by the 120V 21D64-2 ignitor. We are a re-seller. We stock replacement HVAC furnace parts used by the professionals. Give us a call for all your HVAC furnace parts and accessories needs.

 

50M61-843