Key to abbreviations :
AV = Air Vent
BCT = Buderus cylinder thermostat
BDV = Buderus diverter valve
CB = Connection Block
CHF = Central Heating Flow
CHR = Central Heating Return
EV = expansion vessel
JB = Junction Box / RTH Relay
LSV = Lockshield Valve
PL = Permanent Live
PRV = Pressure relief valve
TRV = Thermostatic radiator valve
Buderus 800 with Buderus controls
Buderus 800 with external 230V connection
Key to abbreviations :
AV = Air Vent
CB = Connection Block
CHF = Central Heating Flow
CHR = Central Heating Return
CT = Cylinder thermostat
DV = Diverter valve
EV = expansion vessel
JB = Junction Box / RTH Relay
LSV = Lockshield Valve
PL = Permanent Live
Prog = Programmer
PRV = Pressure relief valve
RT = Room Thermostat
TRV = Thermostatic radiator valve
WC = Wiring Centre
Buderus 800 with external 230V connection and two port zone
Key to abbreviations :
AV = Air Vent
CB = Connection Block
CHF = Central Heating Flow
CHR = Central Heating Return
CT = Cylinder thermostat
EV = expansion vessel
JB = Junction Box / RTH Relay
LSV = Lockshield Valve
PL = Permanent Live
Prog = Programmer
PRV = Pressure relief valve
RT = Room Thermostat
TRV = Thermostatic radiator valve
WC = Wiring Centre
ZV = Two port Zone Valve