22
Figure 3-8 Main components for models 750 and 1000
3 - MAIN COMPONENTS
1 - Levelling feet
2 - Condensate hose that coming from heater’s fl ue exhaust
3 - Condensate neutralizer box
4 - Heat exchanger of the “Burner 1” (Master)
5 - Condensate discharge hose
6 - Gas inlet pipe
7 - Water Supply pipes
8 - Heat exchangers (the highest heat exchanger is not present on
model 750)
9 - Air inlet connection
10 - Electrical cable passages
11 - Air fi lter
12 - Flue exhaust connection
13 - Modbus, 0-10Vcc and cascade communication board
14 - Electrical terminals
15 - Control panel cover
16 - Display
17 - Control keys
18 - Power control boards (the highest power control board is not
present on model 750)
19 - Front cover
20 - “Burner 1” (Master) power control board
21 - Bottom front cover
24 - Flue blocked pressure switch
25 - Electrical control board
40 - Fan cover
5
7
10
12
7
8
7
8
1
7
4
3
8
6
9
24
25
18
18
40
14
20
40
18
40
13
11
15
17
16
21
19
2
020009.01.002
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