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Typical arrangement of tappings shown on the appliance, including optional
extras, but these can be adjusted to suit specific installation requirements.
The feed and expansion tank must be sized to take the water expansion of the
whole system (i.e. solid fuel boiler, open vented boiler and auxiliary heating).
Please note there are 2 optional solid fuel return positions on the solar range to enable
the whole store water volume to be used to store heat when the solar contribution
is negligible.
For example, a solid fuel boiler that is used for space heating would be used in the
winter months when the solar contribution is small. Connecting it to the lower return
enables the store to hold more heat when the solar contribution is negligible.
Alternatively an Aga which runs 24 hours 365 days a year would need to be connected
to the upper return when the solar contribution is greatest and the lower when the
solar contribution is least. This allows the solar to make a contribution to the store even
though the Aga is running 24 hours a day. A manual 3-port diverter valve may be used
to switch from summer to winter mode or more sophisticated control methods used.
The controls should be fitted to maximise useful energy gain: minimise loss of useful
energy and ensure that back-up heat sources are not used when adequate grade solar
contribution is available. For precise guidance please refer to "table 37 section 6.0a
System controls" of the "Domestic building compliance guide 2010".
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Page 11
DESIGN
Torrent ECO SOL
Available Components and Tappings
1. Open vent - 22mm comp (450 - 28mm comp)
2. Overheat stat - 1/2" female
3. Plate heat exchanger flow - 22mm
4. Domestic hot water store sensor
5. Solar sensor
6. Solid fuel flow - 28mm comp
7. OV boiler flow - 22mm comp (350/450 - 28mm comp
8. Central heating flow - 22mm comp
9. Limit stat - 1/2" female
10. SP coil flow - 28mm comp (210 - 22mm comp)
11. Hot water supply - 22mm comp
12. SP coil return - 28mm comp (210 - 22mm comp)
13. Central heating return - 22mm comp
14. Immersion heater
15. OV boiler return - 22mm comp (350/450 - 28mm comp
16. Solid fuel return - 28mm comp
17. Cold mains supply - 22mm comp
18. Solar coil flow - 22mm comp (450 - 28mm comp)
19. Cold feed - 22mm comp
20. Solar sensor
21. Solar coil return - 22mm comp (450 - 28mm comp)
22. Plate heat exchanger return - 22mm
23. Solid fuel return 2 - 28mm comp
24. Drain - 1/2" female
Component kit supplied
A. Thermostat
B. Immersion heater
Specify optional components at time of order
A. Header tank
B. Ball valve
C. Float
D. Overheat thermostat
E. Solid fuel tappings
F. Sealed primary boiler coil
G. Scale inhibitor
SYSTEM DESIGN
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