Hitachi RAC-25NPA Installation Manual

FOR SERVICE PERSONNEL ONLY
SPLIT UNIT AIR CONDITIONER
INSTALLATION MANUAL
RAC-25NPA
Outdoor Unit RAC-35NPA
RAC-50NPA

SAFETY PRECAUTION

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.
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WARNING ........ Incorrect methods of installation may cause death or serious injury.
CAUTION ......... Improper installation may result in serious consequence.
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.
Please request your sales agent or qualiÄ ed technician to install your unit. Water leakage, short circuit or Ä re may occur if
●
you do the installation work yourself.
● Please observe the instructions stated in the installation manual during the process of installation. Improper installation may
cause water leakage, electric shock and Ä re.
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.
● Observe the rules and regulations of the electrical installation and the methods described in the installation manual when
dealing with the electrical work. Use power cables approved by the authorities of your country.
Be sure to use the speciÄ 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 Ä re.
● Please use the speciÄ ed components for installation work. Otherwise, the units may collapse or water leakage, electric
shock and Ä re may occur.
Be sure to use the speciÄ ed piping set for R-410A. Otherwise, this may result in broken copper pipes or faults.
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● When installing or removing an air conditioner, only speciÄ ed refrigerant (R410A) shall be allowed, 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.
Be sure to ventilate fully if a refrigerant gas leak while at work. If the refrigerant gas comes into contact with Ä re, a poisonous
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gas may occur.
● 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 Ä re in the fan-driven heater, space heater, etc., a poisonous gas may occur.
Unauthorized modiÄ cations to the air conditioner may be dangerous. If a breakdown occurs please call a qualiÄ ed air
●
conditioner technician or electrician. Improper repairs may result in water leakage, electric shock and Ä re, etc.
A circuit breaker or fuse (16A time delay) must be installed. Without a circuit breaker or fuse the danger of electric shock
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exists.
A main switch with a contact gap of more than 3mm has to be installed in the power supply line to the outdoor unit.
● Do not install the unit near a location where there is Å ammable gas. The outdoor unit may
catch Ä re if Å ammable gas leaks around it.
Please ensure smooth Å ow of water when installing the drain hose.
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● Piping shall be suitable supported with a maximum spacing of 1m between the supports.
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IA952: A
Carefully read through the procedures of proper
●
installation before starting installation work.
The sales agent should inform customers regarding
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the correct operation of installation.
Tools Needed For Installation Work
+ – Screwdriver Measuring Tape
● ●
Saw ø 65mm Power Drill Hexagonal Wrench
● ● ●
Key ( 4mm) Wrench (14, 17, 22, 26, 27mm)
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Gas Leakage Detector Pipe Cutter
● ●
Vinyl Tape Pliers Flare Tool
● ● ●
WARNING
CAUTION
THE CHOICE OF MOUNTING SITE
● The Outdoor unit must be mounted at a location which can support heavy weight. Otherwise, noise and vibration will increase.
● Do not expose the unit under direct sunshine or rain. Besides, ventilation must be good and clear of obstruction.
● The air blown out of the unit should not point directly to animals or plants.
● The clearances of the unit from top, left, right and front are speciÄ ed in Ä gure below. At least 3 of the above sides must be open air.
● Be sure that the hot air blown out of the unit and noise do not disturb the neighbourhood.
● Do not install at a location where there is Å ammable gas, steam, oil and smoke.
Knife
● ● The location must be convenient for water drainage.
● Place the Outdoor unit and its connecting cord at least 1m away from the antenna or signal line of television, radio or telephone. This is
to avoid noise interference.
Putty
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Names of Outdoor Components
No. Item Qty
Bush
(RAC-25NPA,
2
RAC-35NPA)
10
(RAC-50NPA)
3
Drain Pipe
1
11
Bush
12
1
Dimension of Mounting Stand
of the Outdoor unit
(unit: mm) (RAC-25NPA,
RAC-35NPA)
mounting stand
Dimension of Mounting Stand
of the Outdoor unit
(unit: mm) (RAC-50NPA)
mounting stand
Please mount the Outdoor unit on stable ground to prevent
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vibration and increase of noise level.
Decide the location for piping after sorting out the different
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types of pipe available.
When removing side cover, please pull the handle after undoing
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the hook by pulling it downward.
Please face this side (suction
side) of the unit to the wall.
(Please note the following matters and obtain permission from customer before installation).
WARNING
CAUTION
Figure showing the
Installation of Outdoor Unit
above 200mm
above 50mm when
installed on the
above 100mm
ceiling of balcony
give clearance as
wide as possible
above 100mm
above 200mm
above 700mm
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT
There are holes on the base of Outdoor unit for condensed
water to exhaust.
In order to Å ow condensed water to the drain, the unit is installed
on a stand or a block so that the unit is 100mm above the ground
as shown Ä gure. Join the drain pipe to one hole.
At Ä rst insert one portion of the hook to the base (Portion A), then
pull the drain pipe in the direction shown by the arrow while inserting
the hook into the base. After installation, check whether the drain
pipe cling to the base Ä rmly.
A
BASE
DRAIN PIPE
Please remove side cover
when connecting the piping
and connecting cord.
When Using and Installing In Cold Areas
When the air conditioner is used in low temperature and in snowy
Pull downward
conditions, water from the heat exchanger may freeze on the base
surface to cause poor drainage. When using the air conditioner in
such areas, do not install the bushings. Keep a minimum of 250mm
between the drain hole and the ground. When using the drain pipe,
consult your sales agent.
For more details, refer to the installation Manual for Cold Areas.
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The difference in height
between the indoor and
outdoor unit should be
kept max 10m.
● The connecting pipe,
no matter big or small,
should all be insulated
with insulation pipe and
then wrapped with vinyl
tape. (The insulator will
deteriorate if it is not
wrapped with tape).
The connection of insulated
drain hose.
inner diameter ø 16mm
Please use insulated drain
hose for the indoor piping
(commercial product).
12
BUSH
10 BUSH
11 DRAIN PIPE