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1
Installation
Buderus 500-24S with external 230V connection (Y-plan ; see fig. 35 and 36)
AV
Condensing gas boiler
500 – 24/S
PL
CB
JB
ZV
CHF
CHR
fig. 35
1
3
2
RT
1
C
2
CT
White
Blue
Grey
Orange
Gr/Yel
DV
fig. 36 Wiring diagram Y-plan with exernal 230V controls
Buderus • http://www.buderus-domestic.co.uk
28
Cylinder
CT
RT
Prog
WC
LSV
ZV
radiator
LSV
reference room / main living area
4
5
2
8
7
6
5
2
7
8
3
WC
Installation and maintenance instructions for Buderus 500 - 24/S • 08/2006
TRV
LSV
1
1
2
3
2
3
7
4
6
4
5
1
6
2
3
7
8
1
Brown
9
2
Blue
3
10
Gr/Yel
PL
Black lead
Boiler DBA
Subject to modifications resulting from technical improvements!
Key to abbreviations:
AV = Air Vent
CB = Connector Block
CHF = Central Heating Flow
CHR = Central Heating Return
CT = Cylinder Thermostat
DV = Diverter Valve
JB = Junction Box /
RTH Converter
LSV = Lockshield Valve
PL = Permanent Live
Prog= Programmer
RT = Room Thermostat
TRV = Thermostatic Radiator
Valve
WC = Wiring Centre
radiator
other rooms
L
N
E
230 vac
HW OFF
HW ON
CH ON
L
N
E
Programmer
8
1
2
2
3
JB 230 vac
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