4
F
IG
. 1.6
A
B
ASIC
P
RINCIPLES
Roof mounted collectors
(two collector system shown)
Pump group
Expansion
vessel
Solar system
low level fill
point
Ariston ITSI 210/300
twin coil cylinder
Upper coil
heated by boiler
or other heat
source
Lower coil heated by
solar energy
AST 100
Controller
Air vent
PR Valve
Solar system
drain point
Temperature
Sensor S1
Temperature
Sensor S3
Temperature
Sensor S2
PRV discharge
vessel
Energy
Monitoring
Sensor S4
(option)