Frame assembly and method for installing a window pane in an opening of a panel

A method for installing a window pane (3) in an opening (5) of a panel (7), the method comprising the steps of:

• a) mounting an outer frame (9) on an outer side (13) of the panel (7), the outer frame (9) having a peripheral wall (11) shaped for fitting and extending into the opening (5), the wall (11) having along periphery thereof connecting means (15) and an abutment member (17);
• b) mounting an inner frame (19) on an inner side (23) of the panel (7), the inner frame (19) having a peripheral wall (21) shaped for fitting and extending into the opening (5), the wall (21) of the inner frame (19) having along periphery thereof first connecting means (25) cooperating with the connecting means (15) of the outer frame (9) for disengageably connecting the outer and inner frames (9, 19);
• c) after steps a) and b), mounting the window pane (3) into the opening (5) on the inner side (23) against the abutment member (17) of the outer frame (9);
• and
• d) after step c), mounting a locking means (28) on the inner frame (19) to hold the window pane (3) against the abutment member (17), the locking means (28) having at least one flexible element (31) cooperating with one of the frames (9, 19) for locking the locking means (28) in locking position, and at least one contacting element (33) for holding the window pane (3) in position with aid of the abutment member (17) when the locking means (28) is in said locking position.