2.1.1 ZWE 24/28-5 MFA/MFAE
2. Appliance layout and hydralic diagrams
2.1 Appliance layout
Fig. 1
3 Testing point (injector pressure)
4 Heatronic 3
6 Temperature limiter for heat exchanger
6.3 Temperature sensor for hot water
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
38 System filling loop
43 CH flow
56 Gas valve
63 Adjusting nut for max. gas inlet flow volume
64 Adjusting screw for min. gas inlet flow volume
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
413 DHW flow meter (turbine)
418 Data plate
6 720 613 076-02.1O
221.2
18
18.1
27
32
29
228
120
8.1
361.1
418
7
226
64
63
33
221.1
102
43
38
4
20
3
56
6.3
36
6
15
413
295
6 720 660 238 (2008/07)
4
4 | Appliance Layout and Hydralic Diagrams