Installation Diagram - A.O. Smith Theta T Series Installation, User And Service Manual

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)
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Installation-, User- and Service Manual
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