Riello Gulliver BGK3 Installation, Use And Maintenance Instructions page 14

 Fix the flange 4) (Fig. 8) to the boiler door 6) using screws
7) and (if necessary) the nuts 8) interposing the insulating
gasket 5).
20013962
8
6 5
Installation
Boiler door must have a max. thickness of
80 mm, refractory linig included.
WARNING
7
S7708
12 GB
4
7
Fig. 8