ACCESSORIES WIRING DIAGRAMS
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS
UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO
DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
ALL FUEL SYSTEM AFE18-60A CONTROL BOARD
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| 24VAC |
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POWER SUPPLY |
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| F1 | 3A | +VDC |
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| R |
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INPUT |
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| POWER | +5VDC |
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FURNACE DEMAND |
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F | W1 |
| SUPPLY |
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OUTPUT |
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BLOWER FAN DEMAND | U | G |
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| +VDC |
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OUTPUT |
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| 24VAC | ||
POWER SUPPLY INPUT | R | C |
| C |
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(COMMON) | N |
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| K1 |
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SECOND STAGE FURNACE |
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W2 |
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DEMAND OUTPUT | A |
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COMPRESSOR OUTPUT | C | Y |
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SECOND STAGE | E | Y2 |
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| K2 | ||
COMPRESSOR OUTPUT |
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REVERSING VALVE |
| O |
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| +VDC | |
OUTPUT |
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| 24VAC |
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POWER SUPPLY OUT |
| R |
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| K4 | |
TO THERMOSTAT | T |
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| Q1 | ||
CALL FOR |
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O |
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REVERSING VALVE | H |
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CALL FOR | E | Y |
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COMPRESSOR |
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CALL FOR | R | E |
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| K3 | |
EMERGENCY HEAT | M |
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CALL FOR |
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| Q2 | ||
BLOWER FAN | O | G |
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| +5VDC |
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CALL FOR | S | W1 |
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FURNACE HEAT |
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POWER SUPPLY COMMON | T | C | C | E/W1 |
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OUT TO THERMOSTAT | A |
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CALL FOR 2ND STAGE |
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| 1.0K |
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FURNACE HEAT | T | W2 |
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CALL FOR 2ND STAGE |
| Y2 |
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COMPRESSOR |
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| MICROPROCESSOR |
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| 24VAC | O |
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POWER SUPPLY OUT |
| R |
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TO HP CONTROL |
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| 6.8K |
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HP CALL FOR FURNACE |
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H | W2 |
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(DURING DEFROST) |
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REVERSING | E | O |
| Y |
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VALVE OUTPUT |
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COMPRESSOR | A | Y |
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CONTACTOR OUTPUT | T |
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| 6.8K |
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POWER SUPPLY COMMON |
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C | C |
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OUT TO HP CONTROL |
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| P |
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ODT (OUTDOOR |
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U |
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THERMOSTAT) |
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| M |
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2ND STAGE COMPRESSOR | P |
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DEMAND OUTPUT |
| Y2 |
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| 2 |
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| BREAK FOR ODT |
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| 1 |
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ALL FUEL SYSTEM CONTROL BOARD - AFE18-60A
This wiring diagram is for reference only. Not all wiring is as shown above.
Refer to the appropriate wiring diagram for the unit being serviced.
(For use with Heat Pumps in conjunction with 80% or 90%
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