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JOHNSON CONTROLS
14
FORM 150.68-EG1 (0212)
13 13 13 13
13 14 15
13
20 21 50 51
A+
A-
A+
-XTBC3
-XTBC1
L
5
LK
23 24 25 26 27 28 29 30 31 32 33 34
-XTBC2
ELECTRONIC SECTION
POWER SECTION
ELECTRONIC SECTION
POWER SECTION
M
1
M
2
TUS
TUS
A
CT
23 24 25 26 27 28 29 30 31 32 33 34
O
N
NLY
H
Y
G
T
T
L
13 14 13 15 13 20 13 21 13 50 13 51 A+ A-
STATUS SYSTE
M
STATUS SYSTE
M
1
ALARM
STA
T
2 ALARM
STA
T
P
START CONT
A
ODE INDICATI
O
V
ERY OPTION
O
E START /
STOP
FLOW SWITC
H
D
INHIBIT
N
OPTION
ONL
Y
D
FOR
HEATIN
G
A
GE LOAD
LIMI
T
OR PWM
INPU
T
E RESET
SIGNA
L
REMOTE EMERGENCY
STOP DEVICE
CHILLER
R
UN
S
CHILLER
R
UN
S
SYSTEM
1
SYSTEM
LIQUID PUM
P
COOLING M
HEAT RECO
V
REMOT
E
FAN SPEE
D
TWO SPEED
FA
N
ECTION CLOSE
D
1
ST
ST
A
G
E LOAD
LIMIT
TEMPERA
TUR
E
T
MODE SEL
2
ND
STA
G
ANALOGUE
YLPA CUSTOMER WIRING
Connection Diagram