Panasonic WU-144MF1U9E ECOi/VRF Systems Indoor Unit Installation Manual - Page 10

How To Install The Indoor Unit

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3. HOW TO INSTALL THE INDOOR UNIT ■ 4-Way Cassette Type (U1 Type) 3-1. Preparation for Suspending This unit uses a drain pump. Use a level gauge to check that the unit is level. Note: For DC Fan Tap Change Procedure for 4-Way Cassette, see page 16. Hole-in-anchor Hole-in-plug Concrete Inser t B (suspension bolt pitch) D (ceiling opening dimension) 3-2. Suspending the Indoor Unit (1) Fix the suspension bolts securely in the ceiling using the method shown in the diagrams (Figs. 3-1 and 3-2), by attaching them to the ceiling support structure, or by any other method that ensures that the unit will be securely and safely suspended. (2) Follow Fig. 3-2 and Table 3-1 to make the holes in the ceiling. Table 3-1 Type Length 12, 18, 24, 36 A 31-1/32 (788) Unit: in. (mm) B 28-15/32 (723) C 34-27/32 (885) D 34-27/32 (885) (3) Determine the pitch of the suspension bolts using the supplied fullscale installation diagram. The diagram and table (Fig. 3-3 and Table 3-2) show the relationship between the positions of the suspension fitting, unit, and panel. Table 3-2 Type Length 12, 18, 24 36 A 4-29/64 (113) 4-29/64 (113) B 6-13/16 (173) 6-13/16 (173) C 10-5/64 (256) 12-9/16 (319) Unit: in. (mm) D 8-17/64 (210) 8-17/64 (210) E 3-15/32 (88) 3-15/32 (88) Drain outlet(other side) (VP25) Refrigerant tubing joint(liquid side) Suspension bolt (M10 or 3/8") (field supply) Fig. 3-1 A (suspension bolt pitch) C (ceiling opening dimension) Fig. 3-2 Refrigerant tubing joint(gas side) Suspension lug A B C 1-3/8 (35) D E Fig. 3-3 Over 19/32 (15) 3-3. Placing the Unit Inside the Ceiling (1) When placing the unit inside the ceiling, determine the pitch of the suspension bolts using the supplied fullscale installation diagram. (Fig. 3-4) 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 for connection to the unit before placing the unit inside the ceiling. Supplied bolt Power supply outlet Inter-unit control wiring Unit: in. (mm) 15/32 - 43/64 (12 - 17) Full-scale installation diagram (printed on top of container box) Fig. 3-4 Unit: in. (mm) 10 73'@*OEPPS@64JOEC

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10
3. HOW TO INSTALL THE INDOOR UNIT
4-Way Cassette Type (U1 Type)
■
3-1. Preparation for Suspending
This unit uses a drain pump. Use a level gauge 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 (Figs. 3-1 and 3-2), by attaching them to
the ceiling support structure, or by any other method that ensures
that the unit will be securely and safely suspended.
(2) Follow Fig. 3-2 and Table 3-1 to make the holes in the ceiling.
Table 3-1
Unit: in. (mm)
Length
Type
A
B
C
D
12, 18, 24, 36
31-1/32
(788)
28-15/32
(723)
34-27/32
(885)
34-27/32
(885)
(3) Determine the pitch of the suspension bolts using the supplied full-
scale installation diagram. The diagram and table (Fig. 3-3 and
Table 3-2) show the relationship between the positions of the
suspension fitting, unit, and panel.
Table 3-2
Unit: in. (mm)
Length
Type
A
B
C
D
E
12, 18, 24
4-29/64
(113)
6-13/16
(173)
10-5/64
(256)
8-17/64
(210)
3-15/32
(88)
36
4-29/64
(113)
6-13/16
(173)
12-9/16
(319)
8-17/64
(210)
3-15/32
(88)
Note: For DC Fan Tap Change Procedure for
4-Way Cassette, see page 16.
Hole-in-anchor
Hole-in-plug
Concrete
Insert
Suspension bolt (M10 or 3/8")
(field supply)
Fig. 3-1
D (ceiling opening dimension)
C (ceiling opening dimension)
A (suspension bolt pitch)
B (suspension bolt pitch)
Fig. 3-2
3-3. Placing the Unit Inside the Ceiling
(1) When placing the unit inside the ceiling, determine the
pitch of the suspension bolts using the supplied full-
scale installation diagram. (Fig. 3-4)
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 for
connection to the unit before placing the unit inside
the ceiling.
Drain outlet(other side)
(VP25)
Suspension lug
Refrigerant tubing joint(liquid side)
Refrigerant tubing joint(gas side)
Power supply outlet
Inter-unit control wiring
D
E
A
B
C
1-3/8 (35)
Unit: in. (mm)
Fig. 3-3
Full-scale installation diagram
(printed on top of container box)
Supplied bolt
Over 19/32 (15)
15/32 – 43/64
(12 – 17)
Unit: in. (mm)
Fig. 3-4
VRF_Indoor_US.indb 10
VRF_Indoor_US.indb
10
2011/09/30 12:22:56
2011/09/30
12:22:56