18
3 - MAIN COMPONENTS
22 - Top cover
23 - Main electrical switch
24 - Flue blocked pressure switch
25 - Electrical board
28 - Flue gas temperature sensor (Blue color connector)
29 - High limit fl ue gas temperature fuse (Red color connector)
30 - Flue gas exhaust manifold
31
33
28
34
29
30
22
39
32
24
23
020010.01.028
31 - Water Return connection
32 - Flue blocked pressure switch pipe connection
33 - Condensate blocked drain magnectic switch
34 - Flue gas manifold cap
40 - Fan cover
41 - Water Supply connection
Figure 3-4 Main components for models 199