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2.2 Electrical diagram
1
2
3
4
5
6
Figure 2.1
1 Gas separate valve 1
2 Gas proportional valve
3 Thermostat
4 Main board
5 Direct current fan
6 Power cord
7 Flame detector
8 Igniter
DESCRIPTION OF UNIT
16
15
9 Earth
10 Display
11 Water inlet temperature sensor
12 Water outlet temperature sensor
13 Water flow sensor
14 Gas separate valve 3
15 Main gas valve
16 Gas separate valve 2
14
13
12
11
10
9
8
7
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