Slant/Fin VSL-160B, Installation Instructions Manual

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Figure 3-1 Main components (continued)
3 - MAIN COMPONENTS
1 - Automatic air vent
2 - Air intake and fl ue gas discharge fi tting (venting system)
3 - U7 fl ue gas temp. sensor and fl ue safety switch
4 - Expansion tank (not present on 160-B model)
5 - Inlet air plenum
6 - Air/gas mixer device
7 - U2 d.h.w. temp. sensor (not present on 160-B model)
8 - Heating pressure switch (low water cut-off)
9 - Heating supply connection
10 - DHW connection (not present on 160-B model)
11 - Gas inlet connection
12 - Cold water connection (not present on 160-B model)
13 - Heating return connection
14 - Power Control Board
15 - Openterm interface board (optional)
16 - Connection board
17 - Primary heat exchanger
18 - Spark cable
19 - External jacket
20 - Combustion chamber door
21 - Instrument panel door (in some customized models may be not
present)