MG3P Installation Manual

45
Figure 48. MG3S Ladder Diagram
2-Stage FSHE Furnaces
LADDER DIAGRAM
10331330
(NEW)
06/2020
FIELD WIRING
LEGEND:
LOW VOLTAGE
HIGH VOLTAGE
DOOR
SWITCH
L1 GND N
GND
BLOWER
MOTOR
GND
LINE
FLAME SENSOR
HOT SURFACE IGNITOR
INDUCER
120 VAC
24 VAC
TRANSFORMER
K6
K3
K5
P1-3
EAC
P2-1
HUM
P2-2
LINE-N
LINE-N
P2-4
P2-5
XMFR-N
R
W2
W1
Y1
C
P4-1
P4-2
P4-4
P4-3
P4-5
GND
P1-9
P1-10
P1-8
P1-11
P1-6
LINE
K4
HI
K4
LOW
P2-3
P4-6
XMFR
G
Y/Y2
P1-12
P1-2
P1-1
P1-7
P1-4
R
C
GND
Tx
Rx
W
W
TO
BLOWER
MOTOR
FSHE
BLOWER
BOARD
624840
P1-5
FURNACE
CONTROL
BOARD
624790
MICRO
3A FUSE
HI
LO
K1
K2
GAS
VALVE