Water Circuit - Hydraulics Diagram - A.O. Smith AHD 290 Installation & Service Manual

Legends
Only applicable numbers are mentioned.
1. pressure-reducing valve
(mandatory if the mains water
pressure exceeds 8 bar)
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)
11. service stop valve
(recommended)
12. temperature gauge
(recommended)
13. condensation drainage
(mandatory)
1.5.3 Water circuit – hydraulics diagram
UNVENTED
A
VENTED
H
19
A
4
18
14. hot water draw-off points
15. expansion valve (mandatory)
16. expasion vessel (mandatory)
17. 3-way aeration valve
(recommended)
18. water tank
19. float valve
14
4 4
6
5
4
C
4 1 5
17
E
11
14
14
14
4
C
4
14 14
11
12
T
B
13
16
15
9
12 T
B
13
5 6 4
9
A. cold water supply
B. hot water supply
C. circulation pipe
E. overflow pipe
H. overflow safety
IMD-0604 R
43