OSO 20 RD - S Plan System Schematic

Thermostat 80020
Immersion heater 71259
Right thermostat 80030
Left thermostat 80020
Immersion heater 71259
Electrical spare parts:
S Plan System Schematic
If using a 6-wire 28mm or 1'' BSP V4043H on either circuit the white wire is not needed and must be
made electrically safe.
L
N
4
3
1
2
4
6
L
N
4
3
1
2
4
6
1
2
3
4
2
5
L
N
E
1
2
3
Br
Bl
Gr
Or
5
2
1
1 0
3
Br
Bl
Gr
Or
8
2
1
1 0
3
1
2
3
4
5
6
7
8
9
10
-9-
Honeywell
ST 6400
Programmer 7 day
Honeywell
ST 6300
Programmer 24 Hr
ST 6300
Room stat
Mains
HTG Valve
V4043H
DHW Valve
V4043H
Direct units Indirect units
Adjustment
screw
Automatic
by-pass