Toshiba R410A Service Manual page 52

3
INSTALLATION OF INDOOR UNIT
Concealed duct type
NOTE:
• Recommended supplying grille size 400 cm² each or more
Ledge ceiling concealed duct type
Quality of supplying grilles
SM561BT
SM801BT
SM1101BT
SM1401BT
Restriction to installation
1. Installation clearance
• As shown in the figure, keep clearance around the indoor unit.
Inner ceiling
100mm or more
Returning
Indoor unit
Return air grille
Returning
2
3
4
4
100mm
or more
Channel
Supply grille
Supplying
200mm (diam.)
round duct
Indoor unit
Return air grille
Supplying
Supply
chamber
200mm (diam.)
round duct
NOTE:
• Opening area of the return grille should be larger than
the one for suction port (Air filter) of the indoor unit.
100mm
or more
52
Supply chamber
Supplying
Supply grille
Supplying
300mm
or more