Lennox MS8 SERIES Installation And Service Procedures page 69

TYPICAL OUTDOOR UNIT WIRING DIAGRAM — 09 AND 12 KBTU SYSTEMS (208 / 230V) HEAT PUMP
W4 YEGN
G
XT1
L1
W2 BU
L1 N(1)
W3 BK
2
L1
W1 BN
3
L2
W14 YEGN
POWER
L2
G
L1
TYPICAL OUTDOOR UNIT WIRING DIAGRAM — 18 KBTU SYSTEMS (208 / 230V) AIR CONDITIONER
WARNING
Please don't touch any terminal when
the voltage of terminal P(DC+) and
N(DC−) at AP1 is higher than 30V to
prevent the risk of electrical shock!
YEGN TERMINAL
G
BLOCK
N(1)
N(1)
2
2
3
3
L1
L2
G
YEGN
XT1
L1 L2
POWER
CT1,2
HP
P
W10 RD
W13 WH
E
OVC−COMP
HPP
N1
COMU
AC−L1
HEAT−N1 HEAT−L
HEAT−L HEAT−N2
EH1 EH2
HEATER HEATER
(COMP) (CHASSIS)
FIGURE 77
RT4
0
WH
MAGNETIC
RING
BU
MANUAL
L1
BK
COM−INNER
L1
BN
BN
AC−L
L1
BU
N
G
PE
YEGN
Electronic
expansion
G valve
(OPTIONAL)
FIGURE 78
Page 69
TUBE
OUTROOM EXHAUST
TEM.SENSOR TEM.SENSOR TEM.SENSOR
RT3
RT1 RT2
0 0 0
SAT
CN2
AP1
OFAN1
CN1
4V
4YV
M
EKV
FAN MOTOR
G
OVERLOAD
RT2 RT3 WH WH
RT1
0 0 0
WH BK
OVC−COMP
T−SENSOR
AP1
OFAN
FA
EKV
M1
G
FAN MOTOR YEGN
G
COMP
E
U
COMP
W8 YEGN
W
V
L2 L2 L2
W6 YE W7 RD
W5 BU
COMP−U COMP−V COMP−W
AC−L2
LX−1
LX−2 N2
W11 WH
W12 OG
L3 L3
L
W9 BU
PROTECTOR
SAT
COMP.
YEGN
G
U
COMP
W
V
MAGNETIC
G
L2 L2 L2
RING
BU YE
RD
X1
RD
BU YE
COMP−U COMP−V COMP−W
INDC1 INDC2
WH OG
L
REACTOR
G
N3
Corp. 1244-L9