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Room thermostat
A
B
L
N
MAINS
230V a.c.
Switched 3 Amp fused,
spur
L
N
MAINS
230V a.c.
Switched 3 Amp fused,
spur
HTG = Heating
HW ON = HotWaterON
HW OFF = HotWaterOFF
Valve colour key
BU - Blue
GRYE - Green/Yellow
WH - White
GY - Grey
OR - Orange
BK - Black
BN - Brown
Fig. 6.25 Permanent live Y - plan
INSTALLATION
Cylinder
thermostat
1
C
5
2
4
1
3
2
Programmer
Room thermostat
A
B
10 way
junction box
1
1
L
N
Programmer
BU
8
GRYE
7
WH
GY
6
OR
L
N
HTG
HW ON
HW OFF
2
3
4
5
6
7
8
2
3
4
5
6
7
8
HTG
HW ON
remove room
HW OFF
thermostat link
2
3
5
Electric supply
7
Room thermostat
8
Frostat
terminal block
2
1
3
2
1
4
8
6
7
Mid- position
diverter valve
BL
GRYE
WH
GY
OR
Cylinder
thermostat
1
C
2
9
10
Electric supply
Room thermostat
Frostat
9
10
terminal block
- 53 -
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