Installation manual

4
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 25 m max.
Height difference 10 m max.
No. of bends 10 max.
Refrigerant adjustment If pipe length exceeds 7 m, additional refrigerant (R410A) charge is required.
(The outdoor unit is charged with refrigerant for 7 m pipe length.)
Pipe length
7 m maximum No additional charge required
Exceeding 7 m Additional charge required Refrigerant to be added 20 g/m
PIPING PREPARATION
1 Table below shows the specifications of pipes commercially available.
Pipe Outside diameter Insulation thickness Insulation material
For liquid 6.35 mm 8 mm Heat resisting foam plastic
For gas 15.88 mm 8 mm 0.045 specific gravity
Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm (for ø6.35) or 1.0 mm (for
ø15.88). Never use any pipe with a thickness less than 0.8 mm (for ø6.35) or 1.0 mm (for ø15.88), as the
pressure resistance is insufficient.
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:
Be sure to use the insulation of specified thickness. Excessive thickness may cause incorrect installa-
tion of the indoor unit and lack of thickness may cause dew drippage.
4-1 A CASE OF SUSPENDING INDOOR UNIT FROM THE CEILING
4-1-(1) MOUNTING INSTALLATION PLATE FIXING BOLTS
4. INDOOR UNIT INSTALLATION
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).
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
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
a
*Remove installation pattern after installation.
b
c
d
e
a
a
b
a
1
300 mm
150 mm
1065 mm
f
J
g
max. 40 mm