Function Diagram - Buderus Logamax plus Service Manual

3.8

Function Diagram

Fig. 4
Control Unit (Cotronic 3)
1
Water filling valve
2
By-pass pipe
3
DHW temperatur sensor
4
Flow temperature sensor
5
Temperatur limiter
6
Combustion chamber (flue gas safety) sensor
7
Ionisation electrode
8
Inj. nozzle
9
Burner
10
Ignition electrode
11
Heatexchanger
12
Combustion chamber (fresh air)
13
Combustion chamber
14
Fan
15
Condensate-Heatexchanger (Recuperator)
16
Flue gas pipe
17
Expansion vessel
18
Autom. air vent valve
19
Circulation pump
20
GB012 - 25K
CH safety valve
21
Siphon
22
Turbine
23
DHW water flow rate limiter + Filter
24
Manometer
25
Gas valve
26
Siphon (trichtersiphon) (ops.)
27
Regulator valve
28
Gas filter
29
Measurement point (Inj. pressure)
30
Measurement point (Gas inlet pressure)
31
Safety valve
32
CH-Return circuit
33
DHW inlet
34
Gas inlet
35
DHW outlet
36
CH- Flow
37
Manuel air vent valve
38
Flue gas temperature limiter (STB)
40
Failures / Errors 3
31