Junkers ZWC 18-3 MFK, Service Manual

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2.2.6 ZSC 18/24/28-3 MFK
3 Testing point (injector pressure)
4 HT3
6 Temperature limiter for heat exchanger
6.2 Combustion chamber NTC
6.3 Temperature sensor for hot water
7 Testing point for gas supply pressure
8.1 Manometer
11 Bypass
14 Funnel trap (accessory)
15 Safety valve (CH system)
18 Central heating pump
20 Expansion vessel
26 Valve for charging with nitrogen
27 Automatic air vent
29 Injector jets
30 Burner cover
32 Flame sensing electrode
33 Igniter electrodes
34 Hot water pipe
35 Heat exchanger
36 CH temperature 43 CH flow
44 Hot water flow
45 Gas inlet
46 Cold water inlet
47 CH return
48 Discharge
53 Pressure regulator
55 Filter
56 Gas Valve
57 Safety valve 1
57.1 Safety valve 2
63 Adjusting nut for max. gas inlet flow volume
64 Adjusting nut for min. gas inlet flow volume
69 Control valve
84 Stepper Motor
88 3 Wav valve
411 Combustion chamber
441 Pressure compensation opening
15 | Appliance Layout and Hydralic Diagrams
6 720 660 238 (2008/07)
15
Fig.12