2.1.4 ZSC 21/24/28/30/35-3 MFA/MFAE/MFAP/MFAM
Fig. 4
3
Testing point (injector pressure)
4
Heatronic 3
6
Temperature limiter for heat exchanger
7
Testing point for gas supply pressure
8.1
Pressure gauge
15
Safety valve (CH system)
18
Central heating pump
18.1
Pump speed selector switch
20
Expansion vessel
27
Automatic air vent
29
Burner with injector manifold
32
Flame sensing electrode
33
Igniter electrodes
36
Temperature sensor in CH flow
39
Draught diverter
43
CH flow
56
Gas valve
63
Adjusting nut for max. gas inlet flow volume
64
Adjusting screw for min. gas inlet flow volume
71
Storage flow pipe
72
Storage return pipe
84
Motor
88
3-way valve
102
Inspection window
120
Fixing points
221.1
Flue duct
221.2
Combustion air intake
226
Fan
228
Differential pressure switch
295
Appliance type sticker
361.1
Drain tap
418
Data plate
6 720 613 084 - 04.1O
20
102
88
84
7
64
63
33
56
3
36
11
43
27
18
18.1
361.1
418
8.1
4
221.2
6
226
228
221.1
120
71
72
32
29
295
15
7
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Appliance Layout and Hydralic Diagrams
6 720 660 238 (2008/07)
7
Summary of Contents for ZWC 18-3 MFK
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