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