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75
AST 14 C 258/00
Key:
DK:
low water pressure switch
SF:
NTC flue gas 10K Ohm
FL/TM:
flow
switch
MVD:
motorised
deviating
valve
SS:
NTC DHW probe 10K Ohm
VG:
gas valve
SRT:
NTC return probe
10
K Ohm P:
boiler circulation pump
TF:
flue
gas
thermostat
V:
fan
SM1:
NTC heating probe 1 10K Ohm X2-X7: ground connectors
SM2:
NTC heating probe 2 10K Ohm MOD: gas valve modulation coil
Connections to be made by the installer (ON OUTER TERMINAL BOX)
TA (pins 1-2): ambient thermostat (clean contact free from potential)
OT (pins 3 -4): remote control (shielded wires< 30 m)
SEXT (pins 5-6):
NTC external probe 10K Ohm
Multifunction relay:
pin 9: phase, normally open
pin 10: phase, normally closed
pin
11:
neutral
Warning:
for complex solar systems, the solar valve probe (SVS) must be connected to the
additional board.
6.3 WIRING DIAGRAM
Connecting wires to outer
terminal box
1-2-3-4-5-6-7-8 9-10-11
