A.O. Smith SGE Installation And Operation Manual page 103

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