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3 .4 Components
Power Plus Box 1001
containing the condensing combustion unit connected to
a separator, also acting as a distribution organ to three
distinct systems (high T, low T and hot water), see diagram
in Figure 2.
6
Heat exchanger
1
Burner
2
Jet
3
Venturi tubes
4
Gas valve
5
Vent valve
6
Safety thermostat
7
Min. and differential pressure
8
Flow temperature control
9
Return temperature control
10
Flue temperature control
11
Return pipe
12
Flow pipe
13
Gas pipe
14
Air inlet
15
Exhaust flue duct
16
comprises a metal cupboard
Condensate outlet
17
Condensate manifold
18
Two-way gas valve
19
Fuel check valve
20
Separator
21
Separator drain cock
22
Separator vent valve
23
Modulating circulator
24
VIC probe pit
25
Safety valve
26
Max. INAIL pressure gauge
27
INAIL gauge
28
INAIL thermometer
29
Expansion tank opening
30
Figure 2
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