A.O. Smith SGS - 100, Installation & Service Manual

Page: 103 / 110

Instruction manual SGS 103
is
Main control components Main controller terminal strip
A Controller
B Flame probe
C Hot surface igniter
D Gas control
E Burner earth connection
F Program-controlled pump
G Continuous pump
H External error signal connection
J Isolating transformer
K Double-pole isolator
L Controller 0/I switch
M Display
N Fan
O Temperature sensor (T2 - bottom of tank)
P Dummy
Q Temperature sensor (T1 - top of tank)
R Selection resistor
S Pressure switch
T Potentiostat
U Frequency controller
V RS-485 interface
W Electrical anodes
X Signalling for electrical anodes
Y Mains choke and EMC filter.
Z Solar heating system controller (BUS-link)
F1 Fuse
F3 Fuse
1 X5 BUS-link
2 X6
3 L5 Potentiostat
4 N
5
6
L4 Frequency controller
7 N
8 X3 External ON/OFF
9 X4
10 N
11 L3 Program-controlled pump
12
13
X1 Extra error signal connection
14 X2
15
16
N
17 L2 Isolating transformer (primary)
18
19
N
20 L1 Isolating transformer (secondary)
21
22
23
L Power
24 N