Ariston ecoCOMBI 27 MFFI Installation And Servicing Instructions page 14

Microcondens series, type c boilers
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14
C1 = FAN
1:
"Hall" sensor power supply 12V (red)
2:
"Hall" sensor neutral (blue)
3:
Not used
4:
Start of coil (black)
5:
"Hall" sensor input (white)
6:
End of coil (brown)
C2 = POWER SUPPLY
1:
Earth (yellow/green)
2:
Earth (yellow/green)
3:
Not connected
4:
Neutral (blue)
5:
Not connected
6:
Live (brown)
C3 = CONNECTION TO ROOMSTAT
1:
Input - 1
2:
Input - 2
C4 = TIMER (Factory fitted for MFFI - Oprtional extra for RFFI)
1:
3 V output
2:
Timer ground
3:
Timer output
4:
Not connected
C5 = REMOTE CONTROL (Bus+/Bus-)
1:
Input/output-1
2:
Input/output-2
C6 = SENSOR CONNECTOR
1:
Domestic Hot Water flow switch (grey)
2:
Pump pressure switch (grey)
3:
Under floor heating thermostat (grey)
4:
Heating flow sensor (grey)
5:
Central Heating return sensor (grey)
6:
Domestic Hot Water sensor (grey)
7:
Not used: jumper
8:
Outdoor sensor (grey)
9:
Domestic Hot Water flow switch (grey)
10:
Pump pressure switch (grey)
11:
Under floor heating thermostat (grey)
12:
Flow sensor (grey)
13:
Central Heating sensor (grey)
14:
Domestic Hot Water sensor (grey)
15:
Not used: under floor heating
16:
Outdoor sensor (grey)
C7 = EQUIPMENT CONNECTIONS
1:
Secondary output (optional)
2:
Gas valve (white)
3:
3-way valve neutral (white)
4:
Pump (white)
5:
Ionisation (black)
6:
Not connected
7:
Earth
8:
Pump earth (yellow/green)
9:
Secondary output (optional)
10:
Gas valve (brown)
11:
3-way valve (Domestic Hot Water) (brown)
12:
3-way valve (Central Heating) (brown)
13:
Pump (brown)
14:
Not connected
15:
Earth
16:
Gas valve earth (yellow/green)

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