22
Open-vented System
To hot taps
Cold mains
1 Firebird condensing boiler
2 Open vented cylinder
3 Temp. sensor (after heating)
4 Cold water tank
5 Solar collector
6 Collector temp. sensor
7 Pump station
7A Pressure relief valve
7B Expansion vessel
7C Intermediate vessel (if needed)
8 Controller
9 DHW tank sensors
10 Isolating valve
11 Air vent
SYSTEM SCHEMATICS