Hitachi RAM-110NP6B 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 

fi

 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 

fi

 gures indicates prohibition.

 

Be sure to tighten the 

fl

 are nut to the speci

fi

 ed torque using a torque wrench. If the 

fl

 are nut is tightened excessively, it may

crack as time elapses, cause refrigerant leakage.

!

!

SPLIT UNIT AIR CONDITIONER 

INSTALLATION MANUAL

 Outdoor 

Unit 

RAM-110NP6B

( 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.

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 

fi

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

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.

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.

 

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.

 

Please ensure smooth 

fl

 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

!

 

Selecting the installation location: Suitable location that will reduce the impact from rain and direct sun that may affect the unit performance.
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 

fl

 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

BASE

DRAIN PIPE

3

Bush

Qty

No.

Item

Bush

1

10

11

12

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 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 or  3.5kW

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.)

 

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.

Remove side 
cover when 
connecting 
the piping 
and 
connecting 
cord.

Pull downward

 The pipe connection ports of the outdoor unit and connectable indoor units 

are shown below.

CAUTION

Make sure to connect to
four or more indoor units.

!

If you wish to prepare the copper tubes and insulation material in the fi eld, we recommend the following.

No.

Material

Speci

fi

 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 

fi

 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 3 x 2.5mm

2

.                

(Circuit breaker = 25A)

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

fi

 cult to move from place

to place after the 

fi

 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 regulation is recommended.

Arrange power cord so they 
do not touch service valve.

Bind connecting 
cords to make them

fi

 t between the convex 

sections.

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

Earth line

Procedures of Wiring

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

!

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, “Indoor 4 (1,
2, 3)” for indoor unit 4, “Indoor 5 (1, 2, 3)” for indoor unit 5 and “Indoor 6 (1,
2, 3)” for indoor unit 6.

!

Fig. 3-1

Fig. 3-3

<

IA1243: B 

>

Circuit Breaker

25A

 IMPORTANT

Figure showing the Installation of Outdoor Unit.

Height difference

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

Piping length

(L1 + L2 + L3) = (L4 + L5 + L6) = Maximum 45m

However (L2 + L3) = (L5 + L6) = 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 
by removed the 2 anchor bolt from wood 
pallet and plug-in into the concrete ground 
to prevent vibration and high noise level.

 

Decide the location for piping after sorting 
out the different types of pipe available.

[Outdoor unit installation]

 

FOUR INDOOR UNITS SHOULD BE CONNECTED AT LEAST

 INDOOR 3 AND INDOOR 6 CONNECTION AT OUTDOOR UNIT IS COMPULSORY. IF 

NOT THERE WILL AN ICING AT THE CONDENSER BASE DURING WINTER SEASON.

 To the outdoor unit, up to three indoor units can be connected until the total value of 

each units’s capacity reaches 11 kW.

Note:

Outdoor supply cords
shall not be lighter
than polychloroprene
sheathed 

fl

 exible  cord 

with code designation
60245 IEC 57.

CAUTION

!

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)

INS RAM-110NP6B (EN)   1

INS RAM-110NP6B (EN)   1

8/6/15   4:43 PM

8/6/15   4:43 PM

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