Panasonic CU-4KE31NBU, CZ-18BT1U How to Install the Indoor Unit, Preparation for Suspending, Fig

3. How to Install the Indoor Unit

3-1. Preparation for Suspending

This unit uses a drain pump. Use a carpenter’s level to check that the unit is level.

3-2. Suspending the Indoor Unit

(1)Fix the suspension bolts securely in the ceiling using the method shown in the diagrams, by attaching them to the ceiling support structure, or by any other method that ensures that the unit will be securely and safely suspended. (Fig. 6-1)

(2)Follow the diagram to make the holes in the ceiling.

(3)Determine the pitch of the suspension bolts using the supplied full-scale installation diagram. The dia- gram shows the relationship between the positions of the suspension fitting, unit, and panel. (Fig. 6-2)

3-3. Placing the Unit Inside the Ceiling

(1)	Be sure to remove the fan protection (4pcs) for
	transportation before hanging up the indoor unit.
(2)	When placing the unit inside the ceiling, determine
	the pitch of the suspension bolts using the supplied
	full-scale installation diagram. (Fig. 6-3)
	Tubing and wiring must be laid inside the ceiling
	when suspending the unit. If the ceiling is already
	constructed, lay the tubing and wiring into position

Hole-in-anchor	Concrete	Insert
Hole-in-plug

Suspension bolt (M10 or 3/8") (locally purchased)

Fig. 6-1

23-5/8"(600mm)

Ceiling opening dimensions

21-1/32"(534mm)

Suspension bolt pitch

			Ceiling opening dimensions
21-1/32"(534mm)	Suspension bolt pitch	23-5/8"(600mm)

			22-5/8"(575mm)		Drain tube
		2-3/32"	6-5/16"	6-11/16"	connection port
					(outer dia		1-1/32"(	26mm))
		(53mm)	(160mm)	(170mm)
1-25/32"
	(45mm)				8-15/32" (215mm)	11-5/32"(283mm)
4-19/32"	(117mm)	1-25/32" (45mm)				1-3/16"	(30mm)

	for connection to the unit before placing the unit
	inside the ceiling.
(3)	The length of suspension bolts must be appropriate
	for a distance between the bottom of the bolt and the
	bottom of the unit of more than 19/32" (15 mm) as
	shown in the diagram. (Fig. 6-3)
(4)	Thread the 3 hexagonal nuts (locally purchased) and
	2 supplied washers onto each of the 4 suspension
	bolts as shown in the diagram. Use 1 nut and 1

Power supply port

Over 19/32" (15mm)

Refrigerant tubing joint (narrow tube side)

1/4( 6.35mm) (flared)

Fig. 6-2

1/2" – 23/32" (13~18mm)

washer for the upper side, and 2 nuts and 1 washer

for the lower side, so that the unit will not fall off the

suspension lugs. (Fig. 6-4)

(5) Adjust so that the distance between the unit and the

ceiling bottom is 1/2" (13 mm) to 23/32" (18 mm).

Tighten the nuts on the upper side and lower side of

the suspension lug. (Fig. 6-4)

Supplied screw	Full-scale installation diagram
	(printed on top of container box)

	Fig. 6-3
		Suspension bolt
Nuts and washers			Suspension lug
(used for upper and lower)

Double nut

Notch

1/2" – 23/32"

(13~18mm)

Fig. 6-4

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