Haier HDU-18CF03, HDU-18HF03 Installation of air sending duct, Installation of air return duct

Installation Manual For Indoor Unit

Installation of indoor unit duct

1. Installation of air sending duct

This unit uses rounded duct, the diameter of the duct is 180mm.

The rounded duct needs to add a transition duct to connect with the air-sending duct of indoor unit, then connect with respective separator. As Fig. 1 shown, all the fan speed of any of the separatorís air outlet shall be adjusted approximately the same to meet the requirement for the room air conditioner.

Indoor unit	Soft connection	Transition duct	Rounded duct
	or static box

Tie-in of air distributary

Air distributary

Fig. 1

Unit: mm

2. Installation of air return duct

Use rivet to connect the air return duct on the air return inlet of the indoor unit, then connect the other end with the air return blind. As Fig. 2 shown.

Air return blind Air return duct

Indoor unit

rivet

Fig. 2

3 Thermal insulation of duct

Air-sending duct and air return duct shall be thermally insulated. First stick the gluey nail on the duct, then attach the heat preservation cotton with a layer of tinfoil paper and use the gluey nail cap to fix. Finally use the tinfoil adhesive tape to seal the connected part. As Fig. 3 shown.

gluey	heat preservation	gluey	adhesive tape
nail	cotton	tinfoil nail cap

Fig. 3

27