16
5.9 T
WO
C
OLLECTOR
S
CHEMATIC
F
IG
. 5.9
A
T
WO
C
OLLECTOR
F
LOW
D
IAGRAM
Cylinder
1.
Collector
2.
System Pressure Guage
3.
Pump Group
4.
Automatic Air Vent
5.
Flow Temperature Gauge
6.
Shut Off Valve
7.
Circulating Pump
8.
Flow Limiter
9.
Non-Return Valve
10. Pressure Relief Valve (PRV)
11. PRV Discharge Vessel
12. Return Temperature Gauge
13. Air Separator with Manual Air Vent
14. Expansion Vessel
15. Solar AST 100 Controller
16. Upper Cylinder Temperature Sensor (S3)
17. Lower Cylinder Temperature Sensor (S2)
18. Collector Temperature Sensor (S1)
19. System Fill Point (flow)
20. System Fill Point (return)
21. System Drain
22. Cylinder - twin coil shown
23. Boiler (auxiliary heat source)
