FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
PARTS INCLUDED
• 50M56U-751 Integrated Furnace Control
• 9-Pin Adapter Harness
• Flip Adapter Harness
• 4 – 1” Sheet Metal Screws
• 3 – 1/2” Sheet Metal Screws
• Installation Instructions
DESCRIPTION
SPECIFICATIONS & TIMINGS
ELECTRICAL RATINGS:
Input Low Voltage:
24 VAC, 60 Hz
Input Line Voltage:
120 VAC, 60 Hz, 1
φ
Max Input Current:
0.45 A @ 24 VAC
Relay Contact Ratings:
Gas Valve: 1.5 A, 0.6 PF @ 24 VAC
Ignitor Relay: 1.2 A @ 120 VAC
Inducer Relay: 2.8 A @ 120 VAC
Circulator Relay: 10 FLA, 25 LRA @ 120 VAC
Humidifier Load: 1.0 A @ 24 or 120 VAC
Electronic Air Cleaner: 1.0 A @ 120 VAC
Flame Current Requirements:
Minimum current to ensure flame detection:
0.25 μA DC*
Maximum current for non-detection: 0.1 μA DC
Maximum allowable leakage resistance: 100 M
ohms
* Measured with a DC ammeter
Flame Establishing Time: 0.8 seconds maximum
Flame Failure Response Time:
2.0 seconds maximum
OPERATING TEMPERATURE RANGE:
-40° to 176°F (-40° to 80°C)
HUMIDITY RANGE:
5 to 95% relative humidity (non-condensing)
PART NO. 37-7751001
2031
50M56U-751 with Black Cover
Carrier/ICP Integrated Single Stage
120V Hot Surface Ignition Control Kit
INSTALLATION INSTRUCTIONS
50M56U-751 is an aftermarket direct replacement
control kit for Carrier and ICP single stage furnace
products with PSC blower motors.
Risk of Electric Shock.
Disconnect electric power
to system until installation
is complete. Do not use on
circuit exceeding specified
voltage. Higher voltage will
damage control and could
cause shock or fire hazard.
This control is not intended
for use in locations where
it may come in contact with
water.
May cause flame rollout.
Shut off main gas to
heating system until
installation is complete.
TWINNING: 50M56U-751 can be twinned. The other
control must also be a 50M56U-751 with Black
cover to ensure proper functionality.
AGENCY APPROVALS:
UL USA / Canada
GASES APPROVED:
Natural, Manufactured, Mixed, Liq-
uid Petroleum, and LP Gas Air Mixtures.
emerson.com/white-rodgers
