Buderus 500-24C Installation And Maintenance Instructions Manual page 33

1
Installation
Buderus 500-24C or 500-28C with external Volt Programmable Room thermostat
PL
CHF
DHW
MCW
Fig. 42
1 Condensing gas boiler 500-24C / 28C
2 radiator
3 reference room / main living area
4 other rooms
Key to abbreviations:
CB = Connection Block
CHF = Central Heating Flow
CHR = Central Heating Return
DHW = Domestic Hot Water
JB = Junction Box/RTh Relay
LSV = Lock Shield Valve
MCW = Mains Cold Water
PL = Permanent Live
PRT = Programmable Room Thermostat
(Volt Free Contacts)
T = Timer
TRV = Thermostatic Radiator Valve
33
1
CB
JB
CHR
Buderus 500-24C/28C - Subject to modifications resulting from technical improvements
PRT
LSV
2
LSV
3
TRV
2
LSV
4
7215 3100-42.1TD