A.O. Smith BFC Cyclone 28 Installation, User And Service Manual page 110

Cable colors:
1 Brown
2 Blue
3 Yelow/Green
4 Black
5 White
6 Grey/Beige
7 Green
Terminal block connections:
Earth
A
N Neutral
L Live input of controller
L Phase input of isolating
1
transformer (primary side)
L Phase input of isolating
2
transformer (secondary side)
L Phase input of
3
program-controlled pump
110
Components:
A Control
B Flame probe
C Hot surface igniter
D Gas control valve
E Burner earth connection
F External ON mode switch
G Program-controlled pump
(max. 100 W)
H Extra error signal connection
J Isolating transformer
K Double-pole isolator
L Controller O/I switch
M Display
N Fan
O Temperature sensor
(T - bottom of tank)
2
P Dummy
Q Temperature sensor
(T - top of tank)
1
R Selection resistor
S Push button
T Electrical anodes
U Signaling for electrical anodes
V Potentiostat
Terminal block connections:
J2 Power connection for controller
J19 Extra error signal connection
J20 Gas control valve connection
J21 Program-controlled pump
connection
J40 Fan connection
J36 Controller display connection
JP2 Flame probe and hot surface
igniter connection
JP3 Temperature sensor
T connection
2
JP4 Dummy connection
JP5 Temperature sensor
T connection
1
JP6 Selection resistor and pressure
switch connection
JP8 Extra ON mode switch connection
F1 Fuse (T 3.15 A - 250 V)
F3 Fuse (T 3.15 A - 250 V)
Installation, Maintenance and Service part