Slant/Fin VSL-160B Installation Instructions Manual page 11

3 - MAIN COMPONENTS
22 - Combustion analysis tap
23 - U1 supply temperature sensor
24 - Burner window
25 - Air/gas manifold
26 - U6 high temperature limit sensor
27 - Flue gas back fl ow preventer
28 - Fan
29 - Gas valve
30 - Heating pressure gauge
31 - Display
32 - Domestic hot water temperature control
33 - Heating temperature control
34 - On/off power switch
35 - Three way valve (not present on 160-B model)
36 - U3 domestic cold water temp. sensor (not present on 160-B
model)
Figure 3-1 Main components
37 - Cable clamp
38 - ASME Safety relief valve
39 - U8 return temperature sensor
40 - By-pass pipe (not present on 160-B model)
41 - Condensation discharge pipe
42 - Secondary heat exchanger for domestic hot water production
(not present on 160-B model) (For P/N see Section 15)
43 - Expansion tank connection pipe (not present on 160-B model)
44 - Circulator pump screw (not present on 160-B model)
45 - Circulator pump (not present on 160-B model)
46 - Condensation discharge trap
47 - Flame-proving electrode
48 - Burner
49 - Right ignition electrode
50 - Left ignition electrode
51 - Spark generator
52 - Flue pressure switch
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