20 Instruction manual TWI 35-130 G/TWI 45-190 G
3
Installation
3.5 Connections diagram
Legends
Not mentioned numbers are not
applicable.
1. pressure reducing valve
(obligatory)
3. T&P valve (obligatory)
4. stop valve (recommended
in pipe C and obligatory in
pipe A)
5. non-return valve (obligatory)
6. circulation pump (optional)
9. drain valve
10. manual gas valve (obligatory)
11. service valve
12. temperature meter (optional)
13. condensation drainage
14. draw-off points
15. expansion valve (obligatory)
16. expansion vessel (obligatory)
17. three-way aeration valve
(recommended)
18. water tank
19. fl oat valve
A. cold water supply
B. hot water discharge
C. circulation piping
D. gas supply
E. water overfl ow
H. overfl ow pipe
The fi gure shows the connections diagram. This diagram is used in the
sections describing the actual connecting activities.
Connections diagram
UNVENTED
VENTED
