30
COLD FEED
PIPE & OPEN
VENT PIPE
NOT MORE THAN
150mm (6”) APART
EARTH
MAINS
EARTH POST
NEUTRAL
LIVE
FLUE FAN
INTERSTAT
PUMP L
PUMP N
NEUTRAL
GREEN/YELL
WHITE
BLUE
GREY
HONEYWELL
V4073A
L641A
Cyl.Stat
T6360B
Room Stat
ORANGE
HEATING Timer
DHW Timer
NO DHW Timer
Boiler Run
Brandon
TERMINALS
WIRING
CENTRE
PERMANENT
(FUSED) LIVE
PUMP
C
2
3
1
2
1
2
4
5
6
7
8
9
10
11
12
13
3
It is essential that the interstat can bring on
the motorised valves directly as shown, failure to
observe this will result in nuisance lockout.
Please Note:
EARTHS NOT SHOWN FOR CLARITY CONNECT
EARTHS IN ACCORDANCE WITH REGULATIONS!
If wires are a different colour
code, please refer to the
manufacturers instructions.
Fig. 8.15
Fig. 8.17
Fig. 8.16
PROVISION FOR FILLING SEALED SYSTEM
S PLAN SYSTEM
Y - PLAN WIRING DIAGRAM
DESN 517998
DESN 518000
DESN 517999