- 49 -
INST
ALLA
TION
INSTALLATION
Fig. 6.27
- Not permanent live Y - plan
Electric supply
Room thermostat
Frostat
terminal block
GY
WH
OR
GRYE
3
2
1
4
5
6
7
10
9
8
3
2
1
4
5
6
7
10
9
8
BU
C
1
2
Cylinder
thermostat
Room thermostat
A
B
MAINS
230V a.c.
Switched 3 Amp fused,
spur
L
N
Programmer
HTG
HW OFF
HW ON
L
N
Do not
remove room
thermostat link
Room thermostat
A
B
4
5
Cylinder
thermostat
C
1
2
8
7
6
GY
WH
OR
GRYE
BU
2
3
8
5
7
MAINS
230V a.c.
Switched 3 Amp fused,
spur
L
N
2
3
1
Programmer
HTG
HW OFF
HW ON
L
N
2
1
4
6
7
10 way
junction box
Mid---position
diverter valve
HTG = Heating
HW ON = HotWaterON
HW OFF = HotWaterOFF
Valve colour key
WH - White
GRYE - Green/Yellow
GY - Grey
OR - Orange
BU - Blue
BK - Black
BN - Brown
2
3
8
Electric supply
Room thermostat
Frostat
terminal block