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                CARRIER INTEGRATED HSI CONTROL
 21V51D-751 CARRIER TWO-STAGE INTEGRATED HSI FURNACE CONTROL KIT
• Two-stage applications • 120V HSI ignition
• PSC/VS or ECMx blower motors
   • Tri-color diagnostics LED
• Flame current test pads
• Push button self-test
• Dipswitch fan only speed set up
 Pre-Purge Time: 15 sec IgnitorWarm-Up: 17-19 HeatDelay-To-Fan-On(LowHeat):45 Retries:3times Heat Delay-To- Fan-Off 30 90/*120/150/180
Cool Delay-To- Fan-On: 3 Cool Delay-To-Fan-Off: 5 Auto Reset Time... 60 min Post Purge: 15 sec
 Carrier ECMx ICP ECMx White-Rodgers
                   CEPL130948-01 1184408 21V51D-751
   CEPL130948-02 HK42FZ028 HK42FZ040 Carrier PSC/VS 325879-751 CEPL130455-01 HK42FZ005 HK42FZ010 HK42FZ015 HK42FZ017
CEPL131043-01 50V51-751
 HK42FZ041
ICM PSC/VS
   ICP PSC only
ICM2807
 1172551 1172809 CEPL130591-01 CEPL130591-41 HK42FZ019 HK42FZ020
        SINGLE STAGE HSI FURNACE CONTROL
                      50M56U-843 Replaces:
 • More OEM Boards Than Competitive Models Because It Can Be Used on Both 80V and 120V Ignitor Applications
  • Carrier HK42FZ004, 007, 008, 009, 011 & 016
Fast-Install Kit – includes everything you need:
• Ignition Control Module – 50M56-843
• 12 Quick-Select/Quick-Connect Wiring Harnesses
• HotRodTM Universal Ignitor Kit – 21D64-2
• Installation Instructions and OEM X-Ref Features:
• 3 Fan Speeds – Cool, Low Heat & High Heat Speeds
• Color-Coded (Labeled) Thermostat Connection
• System Diagnostics, with Fault Recall (Stored)
• Cover Label – Displays Diagnostic Table
• Red LED Light – Used for Diagnostic Flash Codes
• Low Voltage – Fuse Protection – 3A Replaceable Automotive Type • Humidifier & Electronic Air Cleaner Connections (Optional)
266 Part numbers and illustrations are for identification only © 1971-2018 w.d. armstrong corp.
                    































































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