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4b
FLUE
PRODUCTS
PRIMARY HEAT
EXCHANGER
BURNER &
BURNER
FLANGE
CH FLOW
THERMISTOR
CH RETURN
THERMISTOR
AUTOMATIC AIR VENT
PRIMARY
FLOW
PRIMARY
RETURN
CH
RETURN
DHW COLD
INLET
CH
FLOW
CONDENSATE
OUTLET
DHW
HOT
OUTLET
EXPANSION
VESSEL
CONDENSATE
TRAP
PRESSURE
GAUGE
3 BAR
PRESURE
RELIEF VALVE
PLATE HEAT
EXCHANGER
FILLING
LOOP
FLOW
TURBINE
PUMP &
HYDROBLOCK
Domestic Hot Water Mode (CBX)
4c
FLUE
PRODUCTS
PRIMARY HEAT
EXCHANGER
BURNER &
BURNER
FLANGE
CH FLOW
THERMISTOR
CH RETURN
THERMISTOR
AUTOMATIC AIR VENT
PRIMARY
FLOW
SECONDARY RETURN
(FROM STORAGE TANK
IF REQUIRED)
CH
RETURN
CH
FLOW
CONDENSATE
OUTLET
EXPANSION
VESSEL
CONDENSATE
TRAP
PRESSURE
GAUGE
3 BAR
PRESURE
RELIEF VALVE
PUMP &
HYDROBLOCK
Central Heating Mode (SBX)
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