A.O. Smith SGE - 40, Installation, User And Service Manual

Page: 28 / 119

Instruction manual SGE 25
is
3.5 Installation diagram The figure shows the Installation diagram. This diagram is referred to in the
sections describing the actual connection procedure.
Installation diagram
Legend Vented and unvented
Unused numbers are not applicable
1.
pressure reducing valve
(mandatory)
3. T&P valve (mandatory)
4. stop valve (recommended in
pipe C and mandatory in pipe
A)
5. non-return valve (mandatory)
6. circulation pump (optional)
9. drain valve (mandatory)
10. manual gas valve
(mandatory)
20. pressure valve (mandatory)
26. air bleed (mandatory)
11. service stop valve
(recommended)
12. temperature gauge
(recommended)
13. condensation drain
(mandatory)
14. draw-off points
15. expansion valve (mandatory)
16. expansion vessel
(mandatory)
17. 3-way aeration valve
(recommended)
18. cold water head tank
19. float switch
23. pressure valve (mandatory)
37. combined Q/T sensor
(optional)
38. solar heating system pump
station (modulating -
mandatory)
A. cold water supply
B. hot water supply
C. circulation pipe
D. gas supply
E. overflow pipe
F. supply heat exchanger
G. heat exchanger return
H. overflow protection
S
1
. collector sensor (mandatory)
S
2
. tank sensor (mandatory)
S
4
. heat exchanger discharge
sensor (optional)
IMD-0783 R0
VENTED
UNVENTED
A
4
19
18
E
H
17
9
9
G
G
F
F
C
C
B
B
S
2
S
2
S
1
S
1
37
37
11
11
12
12
T
T
26
26
42
42
14
14
14
14
14
14
3
3
D
D
10
10
13
13
Q
T
6
6
5
5
4
4
4
4
S
4
S
4
A
4 5 1
15
16
16
16
38
38
4
Q
T