Wolf CGU-2-18 Installation And Maintenance Instructions Manual page 7

Flue gas
temperature limiter
Limit thermostat
Flow sensor 2
Flow sensor 1
Monitoring
electrode
Air vent
Three-way
diverter valve
Heating circuit
pump
Internal filling
equipment (optional)
not <DE><AT>
DHW
Flow & temperature
sensor
Bypass
3062347_0309
Layout CGU-2(K) 18/24
HZ - VL
HZ - RL
Draught hood
Heating water heat
exchanger
Combustion
chamber
Ignition electrode
Gas burner
Expansion vessel
Safety valve
Heating circuit
strainer
Gas combination
valve
Drain valve
Cold water strainer
with throughput
limiter
7