Haier IT9002 Service Manual page 9

IMPORTANT SAFETY WARNING: ONLY USE THE SCREWS PROVIDED WITH THE RANGE HOOD TO MOUNT
THE DUCTING ADAPTOR. THE USE OF LONGER SCREWS MAY CAUSE DAMAGE TO THE INTERNAL WIRING
WHICH WILL NOT BE COVERED BY THE WARRANTY.
Fix ducting (seal joint by 3 pieces ST3X8).
Fig. 11