FOR SERVICE PERSONNEL ONLY
INVERTER SYSTEM MULTI TYPE
INDOOR UNIT
INSTALLATION MANUAL
HITACHI
MODEL
RAD-18QPB
RAD-25QPB
RAD-35QPB
RAD-50QPB
(Mark is exclusive use tool for R410A)
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+ – Screwdriver
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Measuring Tape
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Knife
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Saw
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ø 65mm Power Drill
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Hexagonal Wrench
Key (
4mm)
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Wrench (14, 17, 22, 26mm)
Gas
Leakage Detector
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Pipe Cutter
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Putty
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Vinyl Tape
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Pliers
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Flare Tool
Vacuum Pump Adapter
Manifold Valve Charge Hose Vacuum Pump
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Carefully read through the procedure before start-
ing installation work.
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The sales agent should inform customers regarding
the correct operation of installation.
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Explanation for outdoor unit is in “How To Use”
(Instruction Manual) that is packed with outdoor unit.
Tools Needed For Installation Work
WARNING ........ Incorrect methods of installation may cause death or serious injury.
CAUTION ......... Improper installation may result in serious consequence.
Make sure to connect earth wire.
This sign in the
fi
gures indicates prohibition.
!
!
SAFETY PRECAUTION
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Read the safety precautions carefully before operating the unit.
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The contents of this section are vital to ensure safety. Please pay special attention to the following sign.
Be sure that the unit operates in proper condition after installation. Explain to customer the proper way of operating
the unit as described in the user’s guide.
WARNING
!
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Please request your sales agent or quali
fi
ed technician to install your unit. Water leakage, short circuit or
fi
re may occur if
you do the installation work yourself.
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Unauthorized modi
fi
cations to the air conditioner may be dangerous. If a breakdown occurs please call a quali
fi
ed air
conditioner technician or electrician. Improper repairs may result in water leakage, electric shock and
fi
re, etc.
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Be sure to connect the earth wire from the power supply wire to the outdoor unit and between the outdoor and indoor
unit. Improper earthing may cause electric shock.
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Please observe the instructions stated in the installation manual during the process of installation. Improper installation may
cause water leakage, electric shock and
fi
re.
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Make sure that the units are mounted at locations which are able to provide full support to the weight of the units. If not,
the units may collapse and impose danger.
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Observe the rules and regulations of the electrical installation and the methods described in the installation manual when
dealing with the electrical work. Use wire which is approved of
fi
cial in your country. A short circuit and
fi
re may occur due
to the use of low quality wire or improper work.
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Be sure to use the speci
fi
ed wire for connecting the indoor and outdoor units. Please ensure that the connections are tight
after the conductors of the wire are inserted into the terminals. Improper insertion and loose contact may cause over-heating
and
fi
re.
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Please use the speci
fi
ed components for installation work. Otherwise, the units may collapse or water leakage, electric shock
and
fi
re may occur.
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When installing or transferring an air conditioner to another location, make sure that air other than the speci
fi
ed refrigerant
(R410A) does not enter the refrigeration cycle. If other air should enter, the pressure level of the refrigeration cycle may
increase abnormally high leading to possibility of unit rupture.
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Be sure to ventilate fully if a refrigerant gas leak while at work. If the refrigerant gas comes into contact with
fi
re, a poisonous
gas may occur.
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After completion of installation work, check to make sure that there is no refrigeration gas leakage. If the refrigerant gas
leaks into the room, coming into contact with
fi
re in the fan-driven heater, space heater, etc., a poisonous gas may occur.
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Be sure to use the speci
fi
ed piping set for R410A. Otherwise, this may result in broken copper pipes or faults.
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When installing or removing an air conditioner, do not allow air or moisture to remain in the refrigeration cycle. Otherwise,
pressure in the refrigeration cycle may become abnormally high so that a rupture may be caused.
CAUTION
!
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A circuit breaker must be installed in the house distribution box for the direct connected power supply wire to the outdoor
unit. In case of other installations a main switch with a contact gap or more than 3mm has to be installed. Without a circuit
breaker, the danger of electric shock exists.
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Do not install the unit near a location where there is
fl
ammable gas. The outdoor unit may catch
fi
re if
fl
ammable
gas leaks around it. Piping shall be suitable supported with a maximum spacing of 1m between the supports.
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Please ensure smooth
fl
ow of water when installing the drain hose.
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An IEC approved power cord should be used. Power cord type: NYM.
THE CHOICE OF MOUNTING SITE
(Please note the following matters and obtain permission from
customer before installation.)
!
WARNING
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The unit should be mounted at stable, non-vibratory
location which can provide full support to the unit.
!
WARNING
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No nearby heat source and no obstruction near the air
outlet is allowed.
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The clearance distances from top, right and left are
speci
fi
ed in
fi
gure below.
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The location must be convenient for water drainage and
pipe connection with the outdoor unit.
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To avoid interference from noise, please place the unit
and its remote controller at least 1m from the radio and
television.
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To avoid any error in signal transmission from the remote
controller, please put the controller far away from high-
frequency machines and high-power wireless systems.
Accessories to indoor Unit:
No.
Quantity
Item
1
2
3
4
5
6
7
8
Flare Insulator
Binder
4.0 x 10 Screw
Insulation Pipe
Aluminium Tape (large)
Band
Suspension Clamp (right, left) each
4.0 x 10 Screw
1
2
2
1
1
1
2
8
[Indoor unit installation]
CAUTION
Always install the indoor unit at level. If the
indoor unit is inclined, water may leak.
!
Be sure to completely
seal any gap with putty.
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The connecting pipe,
irrespective of the size,
should all be insulated
with insulation pipe and
then wrapped with vinyl
tape. (The insulator will
deteriorate if it is not
wrapped with tape).
Drain pipe
Must be installed separately.
Insulate indoor part of pipe to
prevent condensation.
The indoor piping should
b e i n s u l a t e d w i t h t h e
enclosed insulation pipe. (If
the insulator is insuf
fi
cient,
please use commercial
products.)
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“Height difference” and “Piping length” of Indoor and Outdoor unit are different by Outdoor unit.
Please refer to the installation manual in Outdoor unit.
<IA1171: A >
1. RECOMMENDATION FOR INSTALLATION
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The
fi
gures below are the recommended installation type for this duct model.
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All the optional parts mentioned for each installation type and screws should be purchased locally prior to the installation.
Full duct type
Semi duct type
Need optional parts
when installing full duct type (Local purchase)
Discharge grille
Chamber of discharge grille ø150mm
Chamber of discharge of unit side ø150mm
Chamber of suction of unit side ø150mm
Chamber of suction grille ø150mm
Suction grille with
fi
lter
Flexible duct ø150mm 1m
Flexible duct ø150mm 2m
2
1
Need optional parts
when installing semi duct type (Local purchase)
Discharge grille
Chamber of discharge grille ø150mm
Chamber of discharge of unit side ø150mm
Suction grille
Flexible duct ø150mm 1m
Flexible duct ø150mm 2m
Non duct type
2. Installation procedure and notice
Select the installation location carefully for the split type
air conditioner. It is very dif
fi
cult to move a split type air
conditioner after the
fi
rst installation.
2.1
Make a hole on the wall as shown in Fig. 2-1.
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The hole on the wall
should be made
with some inclination
like Fig. 2-1 to keep
the smooth
fl
ow of
condensed water.
2.2 Connecting pipe installation
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Seal the end of the pipes to prevent damage from
moisture and water.
2.3 Drain pipe installation
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Use PVC pipe VP20 (O.D. 25mm) for drain pipe.
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You must roll an insulation (thickness 10mm or more) over the indoor section of the drain pipe.
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Position the drain pipe in the downward direction to enable free-
fl
ow of water. Fix it with a hanger and avoid twisting the pipe as
shown in Fig. 2-3.
2.4 Installation method of unit type
INSTALLATION OF FULL DUCT TYPE
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Select the indoor unit position,
fi
xing direction of air outlet so
that cool/hot air reaches all the room. Standard position of
the indoor unit is with the wall side on the ceiling.
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Remove the factory
fi
tted
fi
lter and
fi
lter holders before installing
of full duct type.
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Secure the space for installation, inspection or servicing.
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Apply water-proof treatment to back surface of ceiling under the indoor unit, to prevent water drop.
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Do not allow any obstacle to block air
fl
ow within 1m of suction grille.
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Permissible length and bending of duct.
Discharging side duct
Suction side duct
Permissible length
4m or less added to suction side
1m or less
Bending
90° or less, 1 section
45° or less, 1 section
Other optional parts for display panel wired remote controller
& wireless remote controller SPX-RCDA & SPX-RCKA1
Display panel
1
Panel installation plate
1
Panel cover
1
Remote controller (wireless)
1
Remote Controller Holder
1
3.1 x 16 screw
2
Wired Remote Controller with 2 screws
1
Item
Quantity
No.
1
2
3
4
5
6
7
3
4
5
6
7
1
2
3
4
5
Need optional parts
when installing non duct type (Local purchase)
Discharge grille
Discharge duct
Suction grille
1
2
3
Electrical
box
Air outlet
Filter
Wired
remote
controller
Air inlet
2 ~ 5mm
65mm
Outdoor
side
Large diameter pipe
Small diameter pipe
Insulation pipe
Stagnant water
No trap
No insulation
Do not do the installation as shown as above
Seal
Downward 1/25 ~ 1/100
Insulation
(Thickness 10mm or more)
Tape
(Unit : mm)
Fig. 2-1
Fig. 2-2
Fig. 2-3
Indoor
side
GAS
INS RAD-18-25-35-50QPB (EN) 1
INS RAD-18-25-35-50QPB (EN) 1
12/19/14 9:42 AM
12/19/14 9:42 AM
