A.O. Smith SGS - 100, Installation, User And Service Manual

Page: 32 / 121

Instruction manual SGS 29
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
Unused numbers are not applicable
1. pressure reducing valve
(mandatory)
2. inlet combination (mandatory)
3. T&P valve
4. stop valve (recommended)
5. non-return valve (mandatory)
6 circulation pump (optional),
pump flow 1500 litres/hour,
e.g. Grundfos ST 15/11-2
8. program-controlled pump
(mandatory)
9. drain valve
10. manual gas valve (mandatory)
11. service stop valve
(recommended)
12. temperature gauge
(recommended)
13. condensation drain
(mandatory)
14. draw-off points
16. expansion vessel (mandatory)
17. 3-way aeration valve
(recommended)
18. cold water head tank
19. float switch
23. pressure valve (mandatory)
26. air bleed (mandatory)
37. combined Q/T sensor
(optional)
38. solar heating system pump
station (modulating -
mandatory)
42. Solar heating system
controller
A. cold water supply
B. hot water supply
C. circulation pipe
D. gas supply
E. overflow pipe
F. supply heat exchanger
H. overflow protection
G. heat exchanger return
S
1
. collector sensor (mandatory)
S
2
. tank sensor (mandatory)
S
3
. top of tank sensor (mandatory)
S
4
. solar heating system return
sensor (optional)
Caution
The installation diagram shows a pump station with an integrated non-
return valve. This type of pump unit may only be used with closed systems. In
systems with drain-back, installation of a pump unit with non-return valve is
prohibited. There are special pump units for these systems. Please contact the
pump unit supplier for this.
IMD-0787 R0
VENTED
UNVENTED
A
4
19
18
E
H
17
C
S
1
37
11
11
12
12
T
T
26
42
14
14
14
Q
T
6
8
5
5
4
4
4
4
S
4
9
9
9
G
3
3
F
B
S
2
S
3
D
10
2
13
16
C
S
1
37
11
12
12
T
T
26
42
14
14
14
Q
T
6
8
5
5
4
4
4
4
S
4
9
G
3
3
F
B
B
S
2
S
3
D
10
13
4
16
16
38
38
A
4 5 1
15