Opop H 635 Manual page 13

4 Firing flap
5 Underburning / through-burning flap
6 Long fire bar
7 Short fire bar
8 Grate mechanism
9 Long fire bar support
10 Short fire bar support
Hot Water Boiler Manual – Models H 635, H 650
Fig. 3: Boiler section
13
11 Fire clay panel
12 Ash tray
17 Burner hole plug
23 Fire bridge
24 Secondary air lever
25 Hot water exchanger