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3.4
Installation diagram
The figure shows the Installation diagram. This diagram is referred to in the sections describing the actual connection procedure.
Installation diagram: Theta dual service with a BFC - Unvented.
Legend
1.
pressure relief valve (mandatory if the
mains water pressure is too high)
3.
T&P valve (mandatory)
4.
stop valve (recommended)
5.
non-return valve (mandatory)
6.
circulation pump (optional)
9.
drain valve
10. manual gas valve (mandatory)
11. service stop valve (recommended)
12. temperature gauge (optional)
13. condensation drain
14. draw-off point
15. expansion valve (mandatory)
16. expansion vessel (mandatory)
70
20. heating pump (mandatory)
22. radiator
23. pressure valve (mandatory)
26. heating filling tap (recommended)
32. floor heating
33. room thermostat
40. DHW-pump
42. control Theta dual service module
56. pressure valve (recommended)
57. filling and draining valve (mandatory)
59. 3-way mixing valve (mandatory)
A. cold water supply
B. hot water supply
C. circulation pipe
D. gas supply
IMD-1126b R0.0
hot water supply 3-way mixing valve
from water heater
outlet 3-way mixing valve to plate heat
exchanger
return water to 3-way mixing valve
from plate heat exchanger
S
heating system sensor
5
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