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50M56-743
Integrated Single or Two-Stage
HSI Integrated Furnace Control Kit
INSTALLATION INSTRUCTIONS
Operator: Sa ve these instructions f or future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
The 50M56-743 kit is an automatic gas HSI Integrated Fur-
50M56-743 Cr oss Ref erence Inf ormation
nace Control that employs a microprocessor to continually
Goodman White-Rodgers
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SPECIFICATIONS ELECTRICAL RATINGS [@ 77°F (25°C)]: OPERATING TEMPERATURE RANGE: -40° to 176°F (-40° to 80°C) Input Voltage: 25 VAC 50/60 Hz HUMIDITY RANGE: Max. Input Current @ 25 V A C: 0.45 amp Relay Load Ratings: MOUNTING: Valve Relay: 1.5 amp @ 25 VAC 50/60 Hz 0.6 pf Surface mount multipoise Ignitor Relay: 6.0 amp @ 120 VAC 50/60 Hz (resistive) Inducer Relay: 2.2 FLA–3.5 LRA @ 120 VAC Timing Specs: (@ 60 Hz) Circulator Relay: 14.5 FLA–25.0 LRA @ 120 VAC maxim um Flame Current Requ
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INSTALLATION MOUNTING AND WIRING All wiring should be installed by a qualified heating and air WARNING ! conditioning contractor or licensed electrician, according to local and national electrical codes and ordinances. FIRE HAZARD The control must be secured to an area that will experience a • Do not e xceed the specified v olta g e . minimum of vibration and remain below the maximum ambient • Replace e xisting contr ol with e xact model and temperature rating of 176°F. The control is a
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WIRING TYPICAL SYSTEM WIRING DIAGRAM HOT NEUTRAL (LINE) (LINE) 120 VAC 24 VAC CLASS II TRANSFORMER TH 24 VAC TR 50M56 COOL LO HEAT CIRCULATOR HI HEAT BLOWER LINE XFMR EAC PARK PARK INDUCER IND-N IND IGN IGN-N IGNITOR [4-Pin Connector] CIR N LINE N XFMR N ELECTRONIC EAC N AIR CLEANER Y Y COMPRESSOR W W CONTACTOR G G R R THERMOSTAT C FLAME FS SENSOR PRESSURE SWITCH (N. O.) PROBE PSI PSO HLI HLO HIGH LIMIT AUX. HIGH RO OUT (N. C.) LIMIT (N. C.) GND ROLLOUT RO IN 1 STAGE 2 STAGE (N. C.) MV LO GAS
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WIRING TYPICAL SYSTEM WIRING TABLE 50M56 TERMINAL SYSTEM COMPONENT TERMINAL TYPE CONNECTION low voltage thermostat W terminal (or equivalent) W low voltage thermostat G terminal (or equivalent) G Terminal low voltage thermostat R terminal (or equivalent) R block with low voltage thermostat Y terminal (or equivalent) Y captive (2nd wire from Y terminal goes to 24 VAC HOT side of screws compressor contactor coil) C 24 VAC COMMON side of compressor contactor coil HLO (Pin 1) high limit OUT
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OPERATION AUTO – On call for heat, the automatic second stage will OPTION SWITCHES determine the optimum timing between stages for comfort. The option switches on the 50M56-743 control are used Auto will adapt the delay to energize MV HI from instantly to to determine the length of the heat delay-to-fan-off period, up to 12 minutes. the mode of operation, and the 2nd stage delay period. The following illustration shows the options and the selections of When the thermostat is satisfied,
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SYSTEM LOCKOUT AND DIAGNOSTIC FEATURES SYSTEM LOCKOUT FEATURES FAULT RECALL When system lockout occurs, the gas valve is de-energized, The last five fault codes stored can be displayed on the the circulator blower is energized at heat speed, and, if flame diagnostic LED. When the control is in standby mode (no is sensed, the inducer blower is energized. The diagnostic call for heat or cool), press the FAULT RECALL switch for indicator light will flash or glow continuously to indicate ap
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TROUBLESHOOTING Red LED Flash Error/Condition Comments/Troubleshooting 1 External lockout Failure to sense flame is often caused by carbon deposits on the flame (exceeded retries) sensor, a disconnected or shorted flame sensor lead or a poorly grounded furnace. Carbon deposits can be cleaned with emery cloth. Verify sensor is not contacting the burner and is located in a good position to sense flame. Ignitor must be positioned to light the gas immediately when the valve opens. If the ign
