Lennox MS8 SERIES Installation And Service Procedures page 70

TYPICAL OUTDOOR UNIT WIRING DIAGRAM — 18 KBTU SYSTEMS (208 / 230V) HEAT PUMP
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
N(1)
2
3
L1 L2
POWER
TYPICAL OUTDOOR UNIT WIRING DIAGRAM — 24 KBTU SYSTEMS (208 / 230V) AIR CONDITIONER
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
BLOCK
BU
BK
BN
XT1
L1 L2
POWER
MS8C / MS8H (208-230V)
WARNING
TERMINAL
G
BLOCK
MAGNETIC
RING
BU
N(1) L1
BK
2
COM−INNER
3
L1
BN
BN
L1
AC−L
L1
BU
L2
N
G
YEGN
G
XT1
YEGN
WARNING
G
BU MAGNETIC
N(1)
RING
BK
2
COM−INNER
L1
3
BN
L1
BN
L1
AC−L
BU
L2
N
L1
G
YEGN
G
RT2 RT3
RT4 RT1
0 0 0 0
WH WH
MANUAL T−SENSOR
FA
4V
PE
VT VT
EKV
Electronic
expansion
4YV
G valve
4−WAY
(OPTIONAL)
VALVE
FIGURE 79
RT4 RT1 RT2 RT3
0 0 0 0
WH WH
MANUAL T−SENSOR
FA
PE
YEGN
EKV
C1
Electronic
G
expansion
valve
(OPTIONAL)
FIGURE 80
Page 70
OVERLOAD PROTECTOR
U
COMP
V
MAGNETIC
L2 L2
WH WH
RING
BU YE
BK
BU YE
COMP−U COMP−V
OVC−COMP
AP1
OFAN
INDC1
WH
M1
G
REACTOR
YEGN
FAN MOTOR
G
OVERLOAD PROTECTOR
U
COMP
V
MAGNETIC
L2 L2
WH WH
RING
BU YE
RD
BK
BU YE RD
COMP−U COMP−V
OVC−COMP
AP1
OFAN
INDC1
WH
RD
M1
G
CAP.
REACTOR
BN
FAN MOTOR YEGN
G
SAT
COMP.
YEGN
G
W
G
L2
RD
X1
RD
COMP−W
INDC2
OG
L
SAT
COMP.
YEGN
G
W
G
L2
X1
COMP−W
INDC2
OG
L