Hitachi RAC-25NPA, RAC-35NPA, RAC-50NPA Installation Manual
SPLIT UNIT AIR CONDITIONER
INSTALLATION MANUAL
RAC-25NPA
Outdoor Unit RAC-35NPA
RAC-50NPA
● + – Screwdriver ● Measuring Tape ● Knife
●
Saw ● ø 65mm Power Drill ● Hexagonal Wrench
Key ( 4mm) ● Wrench (14, 17, 22, 26, 27mm)
●
Gas Leakage Detector ● Pipe Cutter ● Putty
● Vinyl Tape ● Pliers ● Flare Tool
● Carefully read through the procedures of proper
installation before starting installation work.
● The sales agent should inform customers regarding
the correct operation of installation.
Tools Needed For Installation Work
SAFETY PRECAUTION
!
!
!
!
● Please request your sales agent or quali ed technician to install your unit. Water leakage, short circuit or 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 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 speci 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 re .
● Please use the speci ed components for installation work. Otherwise, the units may collapse or water leakage, electric
shock and re may occur.
● Be sure to use the speci ed piping set for R-410A. Otherwise, this may result in broken copper pipes or faults.
● When installing or removing an air conditioner, only speci 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 re, a poisonous
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 re in the fan-driven heater, space heater, etc., a poisonous gas may occur.
● Unauthorized modi cations to the air conditioner may be dangerous. If a breakdown occurs please call a quali ed air
conditioner technician or electrician. Improper repairs may result in water leakage, electric shock and re, etc.
FOR SERVICE PERSONNEL ONLY
THE CHOICE OF MOUNTING SITE (Please note the following matters and obtain permission from customer before installation).
!
● 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 speci ed in 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 ammable gas, steam, oil and smoke.
● 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.
OUTDOOR UNIT
Dimension of Mounting Stand
of the Outdoor unit
(unit: mm)
● 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.
Please use insulated drain
hose for the indoor piping
(commercial product).
Dimension of Mounting Stand
of the Outdoor unit
(unit: mm)
(RAC-25NPA,
RAC-35NPA)
(RAC-50NPA)
● Please mount the Outdoor unit on stable ground to prevent
vibration and increase of noise level.
● Decide the location for piping after sorting out the different
types of pipe available.
● When removing side cover, please pull the handle after undoing
the hook by pulling it downward.
Please face this side (suction
side) of the unit to the wall.
Please remove side cover
when connecting the piping
and connecting cord.
Pull downward
Figure showing the
Installation of Outdoor Unit
<
IA952: A
>
● A circuit breaker or fuse (16A time delay) must be installed. Without a circuit breaker or fuse the danger of electric shock
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 ammable gas. The outdoor unit may
catch re if ammable gas leaks around it.
● Please ensure smooth ow of water when installing the drain hose.
● Piping shall be suitable supported with a maximum spacing of 1m between the supports.
2
3
Bush
Names of Outdoor Components
QtyNo. Item
Drain Pipe
1
Bush
1
10
11
12
(RAC-25NPA,
RAC-35NPA)
(RAC-50NPA)
mounting stand
mounting stand
Maximum pipe length 20m
above 200mm
above 100mm
give clearance as
wide as possible
above 50mm when
installed on the
ceiling of balcony
above 100mm
above 700mm
above 200mm
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT
There are holes on the base of Outdoor unit for condensed
water to exhaust.
In order to 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 gure. Join the drain pipe to one hole.
At 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 rmly.
When Using and Installing In Cold Areas
When the air conditioner is used in low temperature and in snowy
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.
A
11
10
12
DRAIN PIPE
BUSH
BUSH
100mm ABOVE
inner diameter ø 16mm
CAUTION
WARNING
● Read the safety precautions carefully before operating the unit.
● The contents of this section are vital to ensure safety. Please pay special attention to the following sign.
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.
WARNING
CAUTION
DRAIN PIPE
BASE
Removal Of Air From The Pipe And Gas Leakage Inspection
Gas Leakage Inspection
Please use gas leakage detector to check
if leakage occurs at the connection of Flare
nut as shown on the right.
If gas leakage occurs, further tighten the
connection to stop leakage. (Use the
detector provided for R410A)
3
Procedures of using Vacuum Pump for Air Removal
As shown in right gure, remove the cap of
valve core. Then, connect the charge hose.
Remove the cap of valve head. Connect the
vacuum pump adapter to the vacuum pump
and connect the charge hose to the adapter.
Fully tighten the “Hi” knob of the manifold
valve and completely unscrew the “Lo” knob.
Run the vacuum pump for about 10~15
minutes, then completely tighten the “Lo”
knob and switch off the vacuum pump.
2
Remove the charge hose and tighten the cap
of valve core. Check the cap’s periphery if
there is any gas leakage.
3
Completely unscrew the spindle of the
service valve (at 2 places) in anti-clockwise
direction to allow the ow of refrigerant (using
Hexagonal Wrench key).
Re-cap the service valve and tighten using
wrench. Check the cap’s periphery if there is
any gas leakage. The task is then completed.
1
Preparation of Pipe
1
● Use a pipe cutter to cut
the copper pipe.
● Jagged edge will cause leakage.
● Point the side to be trimmed downwards during trimming to prevent copper
chips from entering the pipe.
● Before aring, please put on the are nut.
Pipe Connection
2
!
AIR REMOVAL
INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL
● Recommend to use
R410A aring tool.
!
In case of removing are nut of an Indoor unit, rst remove a nut
of small diameter side, or a seal cap of big diameter side will y
out. Prevent water from entering into the piping when working.
When the meter reaches - 101KPa
(-76cmHg) during pumping, fully
tighten the shuttle.
When pumping starts, slightly loosen the
are nut to check of air sucked in. Then
tighten the are nut.
Lo Hi
4
5
WARNING
● If you cannot attach the side cover due to the connecting cord,
press the connecting cord in direction to the front panel to x it.
● Be sure that the hooks of the side cover is xed in certainly.
Otherwise water leakage may occur and this causes short circuit
or faults.
● The connecting cord should not touch to service valve and pipes.
(It becomes high temperature in heating operation.)
Checking for the electric source and the voltage range
● Before installation, the power source must be checked and necessary wiring work
must be completed. To make the wiring capacity proper, use the wire gauges list
below for the lead-in from a pole transformer and for the wiring from a switch board
of fuse box to the main switch and outdoor unit in consideration of the locked rotor
current.
● Investigate the power supply capacity and other
electrical conditions at the installation location.
Depending on the model of room air conditioner
to be installed, request the customer to make
arrangements for the necessary electrical work
etc.
The electrical work includes the wiring work
up the outdoor. In localities where electrical
conditions are poor, use of a voltage regulation
is recommended.
● THIS APPLIANCE MUST BE EARTHED.
Procedures of Wiring
Wiring of The Outdoor Unit
● Please remove the side cover for wire connection.
!
!
In case that power is supplied from Outdoor Unit
Earth terminal
N
C
D
Power supply shall be connected at the rated voltage, otherwise the unit will be
broken or could not reach the speci ed capacity.
L
● The naked part of the wire core should be 10 mm and x it to the terminal
tightly. Then try to pull the individual wire to check if the contact is tight.
Improper insertion may burn the terminal.
● Be sure to use only power cables approved from the authorities in your country.
For example in Germany: Cable type: NYM 3x1.5mm
2
.
● Please refer to the installation manual for wire connection to the terminals of
the units. The cabling must meet the standards of electrical installation.
● There is a AC voltage of 230V between the L and N terminals. Therefore,
before servicing, be sure to remove the plug from the AC outlet or switch off
the main switch.
!
Outdoor
Unit
GRN + YEL
Strip wires
Cable length
up to
16m
up to 15m
up to 25m
Wire cross-section
1.5mm
2
2.5mm
2
4.0mm
2
IMPORTANT
FINAL STAGE OF INSTALLATION
CONNECTION OF POWER CORD
Insulation And Maintenance Of Pipe Connection
1
● The connected terminals should be completely sealed with heat insulator and
then tied up with rubber strap.
● Please tie the pipe and power line together with vinyl tape as shown in the
gure showing the installation of Indoor and Outdoor units. Then x their
position with holders.
● To enchance the heat insulation and to prevent water condensation, please
cover the outdoor part of the drain hose and pipe with insulation pipe.
● Completely seal any gap with putty.
Power Source And Operation Test
2
Power Source
!
● Please use a new socket. Accident may occur due to the use of old socket
because of poor contact.
● Please plug in and then remove the plug for 2 – 3 times. This is to ensure
that the plug is completely plugged into the socket.
● Keep additional length for the power cord and do not render the plug under
external force as this may cause poor contact.
● Do not x the power cord with U-shape nail.
<
IA952: A
>
Operation Test
● Please ensure that the air conditioner is in normal operating condition during
the operation test.
● Explain to your customer the proper operation procedures as described in
the user’s manual.
Power line Control line
Use 16A Time
Delay Fuse
Trimming tool
Copper pipe
Die
Die
Copper pipe
Outer
Diameter
mm (inch)
6.35 (1/4")
9.52 (3/8")
12.70 (1/2")
15.88 (5/8")
1.0 ~ 1.5
1.0 ~ 1.5
1.0 ~ 1.5
1.0 ~ 1.5
Clutch type
A (mm)
1.5 ~ 2.0
1.5 ~ 2.0
1.5 ~ 2.5
1.5 ~ 2.5
Wing nut type
Thickness
(mm)
0.8
0.8
0.8
1.0
0.0
~ 0.5
0.0
~ 0.5
0.0
~ 0.5
0.0
~ 0.5
Flare tool for R410A
Clutch type
Conventional are tool
Flare nut
Torque
wrench
Wrench
Outer
dia.of pipe
6.35 (1/4")
9.52 (3/8")
12.70 (1/2")
15.88 (5/8")
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
Valve
head cap
Torque N·m
(kgf
·
cm)
14.0 – 18.0 (140 – 180)
33.0 – 42.0 (330 – 420)
50.0 – 62.0 (500 – 620)
63.0 – 77.0 (630 – 770)
19.6 – 24.5 (200 ~ 250)
19.6 – 24.5 (200 ~ 250)
29.4 – 34.3 (300 – 350)
12.3 – 15.7 (125 ~ 160)
Small dia. side
Large dia. side
Valve core cap
Small dia. side
Large dia. side
Cap of valve head
Cap of valve head
The body of
service valve
Hexagonal
Wrench Key
Cap of valve
core
Indoor Unit Outdoor Unit
Connecting Cord
Connecting Cord
Insulation material for pipe connection
Putty
Putty
Sleeve of
protection pipe
CAUTION
Outdoor supply cords shall not
be lighter than polychloroprene
sheathed exible cord with code
designation 60245 IEC 57.
WARNING
WARNING
CAUTION
CAUTION
CAUTION
Manifold valve
Vacuum
pump
Charge hose
Valve
Vacuum pump
adapter
Valve
Closed
R410A
Meter showing pressure
Loading...