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FLARED CONNECTIONS
• This unit has flared connections on both indoor and outdoor sides.
• Refrigerant pipes are used to connect the indoor and outdoor units as shown in the figure below.
• Insulate both refrigerant and drain piping completely to prevent condensation.
Limits
Pipe length
15 m max.
Height difference
5 m max.
No. of bends
10 max.
• Refrigerant adjustment ... If pipe length exceeds 7 m, additional refrigerant (R-22) charge is required.
(The outdoor unit is charged with refrigerant for 7 m pipe length.)
7 m maximum
Pipe length
Exceeding 7 m
PIPING PREPARATION
• Refrigerant pipes of 3, 5, 7, 10 and 15 m are available as optional items.
1 Table below shows the specifications of pipes commercially available.
Pipe
Outside diameter
For liquid
9.52 mm
For gas
15.88 mm
2 Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
3 Refrigerant pipe bending radius must be 100 mm or more.
Caution:
Using careful insulation of specified thickness. Excessive thickness prevents storage behind the in-
door unit and lack of thickness causes dew drippage.
No additional charge required
—
Additional charge required
Refrigerant to be added 65 g/m
Insulation thickness
Insulation material
8 mm
Heat resisting foam plastic
8 mm
0.045 specific gravity
4. INDOOR UNIT INSTALLATION
4-1
A CASE OF SUSPENDING INDOOR UNIT FROM THE CEILING
4-1-(1)
MOUNTING INSTALLATION PLATE FIXING BOLTS
1. Determine the locations of installation plate fixing bolts.
• Use installation pattern to determine the locations of instal-
lation plate fixing bolts J.
a Installation pattern
Details are printed on pattern.
Attention:
Surrounding temperature and humidity conditions
may cause paper pattern to shrink or expand.
(Measure dimensions before drilling holes.)
2. Suspension structure (Give site of suspension strong struc-
ture).
I Wood structure
• Select tie beam (one-story houses) or second-floor
girder (two story houses) as reinforcement member.
• Use sturdy beams of at least 60 mm square for beam
pitch of 900 mm or less or of at least 90 mm square for
beam pitch of 900-1800 mm.
a Pitch
b Ceiling
c Rafter
d Bracket
e Roof beam
I Ferroconcrete Structures
• Secure installation plate fixing bolts J as shown at the
right or use angle-stock bracework to install installa-
tion plate fixing bolts J.
f Use inserts rated at 100-150 kg each
g Steel reinforcing rod
J Installation plate fixing bolts
3. Installation plate fixing bolts pitch.
• Use the installation plate fixing bolts J M10 (× 4 procure
locally).
a Indoor unit
b Air outlet
1 Installation plate
• Projecting dimension of installation fixing bolts J from hori-
zontal base line against which you fix installation plate 1
as within at the right.
c Horizontal base line
1 Installation plate
J Installation fixing bolts
5
a
*Remove installation pattern after installation.
a
a
e
b
d
c
g
f
J
1065 mm
150 mm
300 mm
1
b
a
c
max. 40 mm
1
J
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