MG3P Installation Manual

44
1 2 3
1 2 3
FLAME
ROLL-OUT
SUPPLY
AIR LIMIT
LOW
PRESSURE
SWITCH
HIGH
PRESSURE
SWITCH
11 22 33 44 55 66 77 88 99
FLAME SENSOR
24 V
120 V
WHITE
BLACK
WHITE W/ BLK STRIPES
BLK W/ WHITE STRIPES
1234
1234
IGNITOR
DOOR
SWITCH
1
2
1
2
TORQUE
MOTOR
BLACK WHITE
BLACK
WHITE
BLOWER
LIMIT
BLOWER
LIMIT
WHITE ORANGE YELLOW RED BLACK
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
WHITE
ORANGE
YELLOW
RED
BLACK
BLACK WHITE BLUE
ORANGE BLUE YELLOW
WHITE
RED BLACK
BLACK BLACK
GAS
VALV E
LO
HI
C
INDUCER
H
L
C
123 123
R C
GND
RX
TX
W
RCY1 TWINDEHUM
HP
SPEED
COMMON
PWM
MODE
NONE NONE
R C
GND
RX
TX
W
W1
COOL
FAN SPEED
HEAT
11
4 1
8
7
10
5 2
9 3
12
6
LINE- N
XMFR-N
LINE
LINE
XMFR
EAC
HUM
LINE- N
143
25
R
C
TX
RX
W
COM
RCY/Y2 W2
GW1Y1
BLWR OFF
DELAY
BLOWER DECK
LIMIT
BLUE
BROWN
GRAY
PART OF MOTOR
12
BLACK
BLACK
BLACK
WHITE
RED
RESISTOR
(SELECT MODELS)
For 80+ and 90+ 2-Stage Fixed Speed Downflow Furnaces
WIRING DIAGRAM
1016087A
FIELD WIRING
LEGEND:
12/16
LOW VOLTAGE
HIGH VOLTAGE
BLUE
BLUE
BLUE
BLUE
BLACK
BLACK 120V
WHITE
BLACK
BLACK
BLACK
WHITE
WHITE
(NEUTRAL)
BLACK
WHITE
RED
GREEN
GROUND
GREEN
BROWN
YELLOW
BROWN
VIOLET
VIOLET
ORANGE
ORANGE
VENT LIMIT
(ON SELECT
MODELS)
MOTOR CHOKE (ON 3/4 AND 1HP MODELS ONLY )
Refer to the Installation Instructions provided with the kit for the proper heating and cooling speeds for your application.
If any of the origInal wire as supplied with the furnace must be replaced, it must be replaced with wiring material having a temperature rating of at least 105° C. Use copper conductors only.
This wiring diagram shows connections and termination required for the blower kit only. Use in addition to the wiring diagram for the furnace.
FAULT CONDITIONS
Diagnostic Description
OffOff
Red LED
Green LED
Control Fault (No Power)
Flash
Flash
Flash
Alternating Flash
OnOn
On
OnFlash
Off Off
Flash
On
L1 / Neutral Polarity Fault
1 Hour Lockout
Normal Operation Pressure Switch Closed Fault Pressure Switch Open Fault Open Limit Switch Fault Motor Fault
Diagnostic Description
Low Flame Sensor Signal Flame Present
Yellow LED
Continuous Flash
On
Figure 47. MG3S Wiring Diagram