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4.14.3 Interconnecting the appliance, outdoor probe and main control panel (remote)
The connections below should be made by the installer and must be prepared before installing the main control panel (remote), See
"Mounting the main control panel (remote)".
SE
Pcp
W4
W5
OT
GSM
Unpolarised cable
B- A+
RS485 RS485 24V 24V
OT OTSESE
A
+
N
G
D
B
-
24
+
24
-
Shielded polarised cable
1
3
2
4
5
7
6
8
- +
SE
External sensor
OT
OpenTherm communication
GSM
Phone dialler (optional)
MCP
Main control panel
W4
Boiler connector (gas side) – Main control panel
W5
HP-main control panel connector
Fig. 47
m
CAUTION
Installer must:
– Connect the boiler to a 230v -50Hz single phase
power supply through a fused mains switch, with
at least 3mm spacing between contacts, fused at
3amps
which ensures complete cut-off in overvoltage
category III conditions (i.e. where there is at least 3
mm between the open contacts)
.
– Respect the connections L (Live) - N (Neutral).
– Ensure that the special power cable is only replaced
with a cable ordered as a spare part and connected
by professionally qualified personnel.
m
CAUTION
Installer must:
– Connect the earth wire to an effective earthing sys-
tem.
Sime Ltd
declines all responsible for any inju-
ry or damage to persons, animals,or property as a
result of failure to provide adequate earthing of the
appliance.
d
DO NOT
Do not use water pipes for earthing the appliance.