Hitachi RAM-53NP3B Installation Manual Download Page 1

CONDENSED WATER DISPOSAL OF OUTDOOR UNIT

 

There are holes on the base of Outdoor unit for condensed 
water to exhaust.

 

In order to 

fl

 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 

fi

 gure. Join the drain pipe to 

one hole.

 

At 

fi

 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 

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 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.

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 

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 gures indicates prohibition.

 

Be sure to tighten the 

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 are nut to the speci

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 ed torque using a torque wrench. If the 

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 are nut is tightened excessively, it may

crack as time elapses, cause refrigerant leakage.

!

!

SPLIT UNIT AIR CONDITIONER 

INSTALLATION MANUAL

 Outdoor 

Unit 

RAM-53NP3B

( M a r k       i s   e x c l u s i v e   u s e   t o o l   f o r   R 4 1 0 A )

+  –  Screwdriver 

 Measuring Tape 

 Knife 

 Saw

 ø 65mm Power Drill 

 Hexagonal Wrench Key (      4mm) 

Wrench (14, 17, 22, 26mm)      Gas Leakage Detector 

Pipe Cutter   

 Putty   

 Vinyl Tape

Pliers

 Flare Tool       Vacuum Pump Adapter      Manifold Valve     

    Charge Hose     Vacuum Pump 

Carefully read through the procedures of proper
installation before starting installation work.

 The sales agent should inform customers regarding

the correct operation of installation.

SAFETY PRECAUTION

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

!

CAUTION

!

 

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 3.5mm has to be installed. Without a
circuit breaker, the danger of electric shock exists.

 

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.

FOR SERVICE PERSONNEL ONLY

Tools Needed For Installation Work

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.

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.

 

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.

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.

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

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.

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.

Be sure to use the speci

fi

 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

fi

 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 leading to
possibility of unit rupture.

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.

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 

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 re in the fan-driven heater, space heater, etc., a poisonous gas may occur.

 

Do not install the unit near a location where there is 

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 ammable gas. The outdoor unit may catch 

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 re  if 

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 ammable

gas leaks around it.

 

Please ensure smooth 

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 ow of water when installing the drain hose.

 

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

!

 

The Outdoor unit must be mounted at a location which can support heavy weight. Otherwise, noise and vibration will increase.

CAUTION

!

 

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

fi

 ed  in 

fi

 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 

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 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.

Names of Outdoor Components

Drain Pipe

1

Dimension of Mounting Stand

of the Outdoor unit

(unit: mm)

A

Figure showing the Installation of Outdoor Unit.

3

Bush

Qty

No.

Item

Bush

1

10

11

12

Height difference

Height difference between indoor units should 
be not more than 5m.

Piping length

(L1 + L2 + L3) = Maximum 45m

(However, L1 + L2 = Maximum 35m)

Minimum piping length for each indoor unit is 3m.

Maximum piping length for one indoor unit is 25m.

   In case the pipe length is more than 35m, add 
refrigerant R410A at 20 gram per every meter exceeds.

 

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.

Flare adaptor for piping

The 

fl

 are adaptor for piping is required 

depending on combination of indoor 
units.

ø9.52(3/8”) 

 ø 12.7 (1/2”)

Parts number TA261D-4 001

One unit of 1.5kW, 1.8kW, 2.5kW or 
3.5kW

One unit of 1.5kW, 1.8kW, 2.5kW, 
3.5kW or 5.0kW
(5kW unit: Optional 

fl

 are adaptor for 

piping is
necessary.)

One unit of 1.5kW, 1.8kW, 2.5kW, 
3.5kW or 5.0kW
(5kW unit: Optional 

fl

 are adaptor for 

piping is necessary.)

 

When removing side cover, pull the handle 
after releasing the hook by pulling it 
downward.

Face this side (suction side) of 
the unit to the wall.

 

To the outdoor unit, up to three indoor units can be connected until 
the total value of each units’s capacity reaches 8.8 kW.

 

The pipe connection ports of the outdoor unit and connectable indoor 
units are shown above.

[Outdoor unit installation]

CAUTION

Make sure to connect
to two or three indoor
units.

!

If you wish to prepare the copper tubes and insulation material in the 

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 eld, we recommend the following.

No.

Material

Speci

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 cation

1

Cooper tube

Deoxidized annealed copper pipe with 6.35mm O.D., 0.8mm wall thickness.

4.0kW or less

Small dia.

Deoxidized annealed copper pipe with 9.52mm O.D., 1.0mm wall thickness.

Large dia.

Deoxidized annealed copper pipe with 6.35mm O.D., 0.8mm wall thickness.

Small dia.

Deoxidized annealed copper pipe with 12.7mm O.D., 1.0mm wall thickness.

Large dia.

5.0kW

2

Flare nut

Flare nuts with 6.35mm O.D..

4.0kW or less

Small dia.

Flare nuts with 9.52mm O.D..

Large dia.

Flare nuts with 6.35mm O.D..

Small dia.

Flare nuts with 12.7mm O.D..

Large dia.

5.0kW

3

Insulation for refrigerating pipe

Foamed polyethylene insulation pipe which does not corrode the copper tube.

Large dia. pipe side: 15mm I.D.., 8mm wall thickness.

Small dia. pipe side: 8mm I.D., 7mm wall thickness.

4

Connecting cord

Refer to item 3.3.

5

Vinyl tape

6

Sealer (Putty)

7

Refrigerator oil

8

Bushing for refrigerating pipes

1.  Proper place for installation

1.1 Outdoor unit

(1) Keep the space around the unit for maintenance and avoiding the effects of hindrance for normal ventilation of the unit.
(2) The northern or eastern side of the building is better to install. At the installation on the southern or western side unavoidably, some blind
 

should be set up for the unit. (In this case, the blind must not obstruct the ventilation of the unit.)

(3) You’d better not put the unit at a place where is full of dirt and at a place where is wet in the rain.
(4) Place as near as possible to the indoor unit.
(5) Install the unit in a stable place to minimize vibration or noise.
(6) After arranging the cords and pipes, secure them in place.

WARNING

If you cannot attach the side cover due to the connecting cord, press the connecting cord in direction to the front panel
to 

fi

 x  it.

Be sure that the hooks of the side cover is 

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 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.)

This appliance must be earthed.

Power is supplied through outdoor unit, do not connect power source to indoor unit.

Wiring of The Outdoor Unit

Please remove the side cover for wire connection.

!

WARNING

!

The naked part of the wire core should be 10 mm and 

fi

 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

. (fuse

= 16A time delay)

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 drop between the L and N terminals. Therefore, before servicing, be sure to switch off the main switch.

2.

 

In the electrical installation a separator with a contact gap of more than
3mm has to be installed. During cleaning or service the set has to be
switched off with this separator.

3.  Installation procedure and notice

Especially, the selection of installation place need great care for the
split type air conditioner, because it is very dif

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 cult to move from place

to place after the 

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 rst installation.

3.1 Wiring

(1) Connect the electrical wiring between the Indoor and Outdoor unit,

as shown in Fig. 3-1. Never connect the wiring by mistake.
In case of wrong connection, the unit does not operate properly
and it may cause malfunction.

(2) The connecting cord must be 

fi

 xed by the band which is located

near the terminal board.

3.3  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 outlet. In localities where electrical
conditions are poor, use of a voltage regulator is recommended.

Circuit Breaker

20A

Arrange power cord so they do not touch 
service valve.

Grounding rod (optional)
(Earth wire and grounding rod are not supplied. Please use optional items below.)

Earth line

 IMPORTANT

Fig. 3-2

3.2  Connection of the connecting cords and power cord

(1) Cut off the connecting cord, the power cord and strip the
 

insulation of the wire, as shown in Fig. 3-2.

(2) Connect the connecting cord and power cord to the terminal
 

board. (Fig. 3-3)

(3) Fix the connecting cords and power cord with steel band

certainly. (Fig. 3-3)

WARNING

!

Type of grounding rod

SP-EB-2

Length

900mm

CAUTION

!

CAUTION

Note:

Outdoor supply cords shall not be lighter
than polychloroprene sheathed 

fl

 exible 

cord with code designation 60245 IEC 57.

!

Fig. 3-1

Fig. 3-3

<

IA1211: B 

>

BASE

DRAIN PIPE

Remove side cover 
when connecting the 
piping and connecting 
cord.

Pull downward

Procedures of Wiring

Cable type

3 Core

Cable type

4 Core

Cable length

up to 25m

Wire cross-section

2.5mm

2

Wire cross-section

1.5mm

2

IMPORTANT

For (Power cord - L, N, Earth)

For (Connecting cord - 1, 2, 3, Earth)

Bind connecting cords to make them

fi

 t between the convex sections.

WARNING

Connect the Connecting Cord to “Indoor 1 (1, 2, 3)” for
indoor unit 1, “Indoor 2 (1, 2, 3)” for indoor unit 2, “Indoor
3 (1, 2, 3)” for indoor unit 3.

!

INS RAM 53NP3B   1

INS RAM 53NP3B   1

10/14/15   9:52 AM

10/14/15   9:52 AM

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