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0020193966_04 ecoTEC exclusive Installation and maintenance instructions
57
1
Main PCB
2
Operator control panel PCB
3
All-gas sensor
4
Gas valve assembly
5
Outdoor temperature sensor, flow temperature
sensor (optional, external), DCF receiver
6
Circulation pump remote control
7
Return temperature sensor
8
Flow temperature sensor
9
Fan
10
Contact thermostat/burner off
11
24 V DC room thermostat
12
Bus connection (digital room thermostat/control)
13
Prioritising diverter valve
14
Water pressure sensor
15
Cylinder temperature sensor
16
Cylinder contact "C1/C2"
17
Internal heating circuit flow rate sensor
18
Internal pump
19
Gas family coding resistor
20
Additional relay (select via D.026)
21
Circulation pump
22
Ignition electrode