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1.5.3 Water circuit – hydraulics diagram
IMD-0604 R0
VENTED
UNVENTED
A
4
19
18
E
H
17
16
15
T
T
A
1
5
13
13
4
6
6
5
5
4
4
4
4
C
C
B
B
9
9
14
14
14
14
14
14
12
12
11
11
4
4
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)
14. hot water draw-off points
15. expansion valve (mandatory)
16. expasion vessel (mandatory)
17. 3-way aeration valve
(recommended)
18. water tank
19. oat valve
A. cold water supply
B. hot water supply
C. circulation pipe
E. overow pipe
H. overow safety