White Rodgers Single Stage/ HSI Integrated / Furnace Control Kit 50M56U-843
Replaces:
• More OEM Boards Than Competitive Models
Because 50M56U-843 Can Be Used on Both
80V and 120V Ignitor Applications
• Carrier HK42FZ004, HK42FZ007, HK42FZ008,
HK42FZ009, HK42FZ011 and HK42FZ016
Fast-Install Kit – includes everything you
need for quick and accurate replacement:
• Ignition Control Module – 50M56-843
• 12 Quick-Select/Quick-Connect Wiring Harnesses
• Universal Nitride Ignitor Kit – 21D64-2
• Installation Instructions and OEM Cross-Reference
Features
• 3 Fan Speeds – Cool, Low Heat & High Heat Speeds
(Terminal Connections)
• Color-Coded (Labeled) Thermostat Connection –
For Quick Helpful Selection
• 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)
Specifications
Electrical Rating [@ 77°F (25°C)]
Input Voltage: 25 VAC 50/60 Hz
Max. Input Current @ 25 VAC: 0.45 amp
Relay Load Ratings: Valve Relay:
1.5 amp @ 25 VAC 50/60 Hz 0.6 pf
Ignitor Relay: 6.0 amp @ 120 VAC 50/60 Hz (resistive)
Inducer Relay: 2.2 FLA–3.5 LRA @ 120 VAC
Circulator Relay: 14.5 FLA–25.0 LRA @ 120 VAC
Flame Current Requirements
Minimum current to insure flame detection: 1 μa DC*
Maximum current for non-detection: 0.1 μa DC*
Maximum allowable leakage resistance: 100 M ohms
*Measured with a DC microammeter in the flame probe lead
Operating Temperature Range
-40° to 176°F (-40° to 80°C)
Mounting
Surface mount multipoise
Timing Specifications (@ 60 Hz)
Maximum
Flame Establishing Time: 0.8 sec
Flame Failure Response Time: 2.0 sec
Gases Approved: Natural, Manufactured, Mixed,
Liquified Petroleum, and LP Gas-Air Mixtures are
all approved for use.
Relay Load Rating
Main Valve Relay: 1.5A @ 25 VAC 60 Hz
Hot Surface Ignition
120 VAC
Notes:
OEM furnace models abbreviated to shorten the length. Reference the control board P/N
for proper replacement.
*If existing furnace circuit board has 2 green lights and NO amber light (furnace date code 3294
or earlier), an additional Flame Sensor Kit (Rheem Part 62-24044-71) may be required.
‡50M56U-843 will not replace HK42FZ013 or control boards with an 11-pin bar connector.
N/A = Not Available
Important: 21D64-2 Ignitor Note –
In these applications, the existing 80V ignitor must be replaced by the 120V 21D64-2 ignitor.
Notes:
OEM furnace models abbreviated to shorten the length. Reference the control board P/N
for proper replacement.
*If existing furnace circuit board has 2 green lights and NO amber light (furnace date code 3294
or earlier), an additional Flame Sensor Kit (Rheem Part 62-24044-71) may be required.
‡50M56U-843 will not replace HK42FZ013 or control boards with an 11-pin bar connector.
N/A = Not Available
Important: 21D64-2 Ignitor Note –
In these applications, the existing 80V ignitor must be replaced by the 120V 21D64-2 ignitor.
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