34
EAR
TH
PUMP
M
L641A
Cyl.
St
at
T6360B Room
St
at
Motorised
Valve
WET
HE
AT
ING
ZONE
1
ZONE
2
UNDERFLOOR
HEA
TING
SYSTEM
&
CONTROL
Motorised
Valve
Domestic
Hot
Wa
ter
EAR
TH
POST
MAINS
Heatranger TERMINALS
WIRING CENTRE
NEUTRAL
LIVE
FLUE
FA
N
INTERS
TA
T
PUMP
L
PUMP
N
NEUTRAL
HEA
TING
Ti
mer
DHW
Ti
mer
NO
DHW
Ti
mer
Boiler
Run
PERMANENT (FUSED)
LIVE
M
Orange
Grey
Grey
Brown
Brown
Brown
Blue
Blue
Grey
Orange
Orange
1
2
4
5
6
7
8
9
10
11
12
13
3
Fig. 8.21
S PLAN WIRING DIAGRAM SHOWING ZONE CONTROLLED
BY UNDERFLOOR HEATING ZONE
DESN 518004