Thermo Technologies Slope Roof - Manual (Page 7)

M A Z D O N ‘ 2 ’ T Y P E S Y S T E M
7
System Operation and Plumbing Details
The interconnections of the manifolds, pumps, valves, and pipes shall meet the recommendations required
by manufacturer's installation manual books. Great care must be taken to ensure long-term durability and
leak tightness of the interconnection and piping. The typical closed loop interconnection for the
Thermomax solar collectors is shown in the following diagram:
1. Collector
2. Collector Sensor
3. Manual Air Valve
4. Hot Water to Existing Tank
5. Tempering Valve
6. Solenoid Valve (Optional) 7. Check Valve (Optional)
8. Hose Bibs for Filling and Flushing
9. Expansion Tank
10. Air Purge and Air Vent
11. Circulating Pump
12. Pressure Relief Valve 13. Pressure Gauge
14. Collector Supply
15. Heat Exchange Coil
16. Solar Hot Water Tank
17. Immersion Heater
18. Solar Controller
a) The Control System will switch on the pump when the temperature at the collector sensor TC is
higher than the return temperature TR by at least the pre-selected amount.
b) The pump circulates heat transfer liquid around the loop.
c) Heat from the collector is transferred to the storage tank.
d) Solenoid valve (6) discharges hot water if the tank temperature is reached at T
MAX
(vacation or
low hot water usage system protection).
When a pre-set tank temperature is reached at T
MAX
, the solar controller system switches off the pump.
The check valve (non-return valve) prevents heat from the tank rising towards the collector should the
tank be warmer (e.g. at night).