Panasonic WU-144MF1U9E ECOi/VRF Systems Indoor Unit Installation Manual - Page 31

3-21. Suspending the Indoor Unit Depending on the ceiling type: • Insert suspension bolts as shown in Fig. 3-86 or • Use existing ceiling supports or construct a suitable support as shown in Fig. 3-87. Hole-in-anchor Hole-in-plug Concrete Inser t WARNING It is important that you use extreme care in supporting the indoor unit inside the ceiling. Ensure that the ceiling is strong enough to support the weight of the unit. Before hanging the unit, test the strength of each attached suspension bolt. Suspension bolt (M10 or 3/8") (field supply) Fig. 3-86 Ceiling tiles Ceiling support (1) When placing the unit inside the ceiling, determine the pitch of the suspension bolts referring to the dimensional data on the previous page. (Fig. 3-84 and Table 3-3) Tubing must be laid and connected inside the ceiling when suspending the unit. If the ceiling is already constructed, lay the tubing into position for connection to the unit before placing the unit inside the ceiling. Fig. 3-87 (2) Screw in the suspension bolts allowing them to protrude from the ceiling as shown in Fig. 3-86. (Cut the ceiling material, if Suspension bolt necessary.) (3) Thread the 3 hexagonal nuts and 2 washers (field supply) onto Nuts and washers (use for upper and lower) Suspension lug each of the 4 suspension bolts as shown in Figs. 3-88 and 3-89. Use 1 nut and 1 washer for the upper part, and 2 nuts and 1 washer for the lower part, so that the unit will not fall off the suspension lugs. Double nuts Notch Fig. 3-88 Suspension bolt ● Fig. 3-90 shows an example of installation. Air outlet duct Bolt anchor Suspension bolt Air-intake duct Hexagonal nut Double nuts Fig. 3-89 Air-outlet grille Ceiling material Indoor unit Air-intake grille Fig. 3-90 31 73'@*OEPPS@64JOEC