Hitachi RAM-90NP5E Installation Manual Download Page 1

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SPLIT UNIT AIR CONDITIONER

INSTALLATION MANUAL

Outdoor Unit

RAM-90NP5E

●

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

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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

●

Flare nut must use a torque wrench without fail. Tighten with the speci

ed tightening torque. If the

are nut is

tightened too much, after a long period of time, the

are nut breaks, Gas leakage, stagnation, touching

re, rarely

cause ignition.

●

Sharp bending of the pipe use the polyethylene rod, bend not crushed the pipe. Gas leakage from the crushed part,

stagnation, touching

re, rarely cause ignition.

●

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.

●

A brazed, welded, or mechanical connection shall be made before opening the valves to permit refrigerant to

between the refrigerating system parts. A vacuum valve shall be provided to evacuate the interconnecting pipe and/
or any uncharged refrigerating system part.

●

Mechanical connectors used indoors shall comply with ISO 14903. When mechanical connectors are reused indoors,

sealing parts shall be renewed. When

ared joints are reused indoors, the

are part shall be re-fabricated.

●

Refrigerant tubing shall be protected or enclosed to avoid damage.

●

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 R32. Otherwise, this may result in broken copper pipes or faults.

●

When installing or removing an air conditioner, only speci

ed refrigerant (R32) 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. Be aware that refrigerants may not contain an odour.

●

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

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).

Dimension of Mounting Stand

of the Outdoor unit

(unit : mm)

Names of Outdoor Components

●

A circuit breaker or fuse must be installed. Without a circuit breaker or fuse the danger of electric shock exists.

The external switch shall be incorporated to completely disconnect from power supply. It should disconnect all

poles, and a contact separation of at least 3mm must be present.

●

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.

●

Do not install the indoor unit in a machine shop or kitchen where vapor from oil or its mist

ows to the indoor

unit. The oil will deposit on the heat exchanger, thereby reducing the indoor unit performance and may deform
and in the worst case, break the plastic parts of the indoor unit.

●

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.

(

mark is tool exclusive use for R32)

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+ – Screwdriver

●

Measuring Tape

●

Knife

●

Saw

●

Pipe Cutter

●

Hexagonal Wrench Key (

4mm)

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Power Drill (ø 65mm ~ ø 80mm)

Vacuum Pump

●

Pliers or Wrench

●

Torque Wrench

Vacuum

Pump Adaptor

●

Flare Tool

Gas Leakage Detector

Manifold Valve

Charge Hose

●

Reamer

●

File

Figure showing the Installation of Outdoor Unit.

●

This unit is chargeless up 35m pipe length.

●

Installation of pipe length less than minimum pipe length
requirement (3 meters) may generate an abnormal sound.

CAUTION

IA0000: A

This symbol shows that this
equipment uses a

ammable

refrigerant.
If the refrigerant is leaked, together
with an external ignition source,
there is a possibility of ignition.

This symbol shows that the
Operation Instructions should be
read carefully.

This symbol shows that a service
personnel should be handling this
equipment with reference to the
Installation Manual.

This symbol shows that there
is information included in
the Operation Manual and/or
Installation Manual

WARNING

CAUTION

BURST HAZARD

Do not allow air, etc. to
get into refrigerant cycle
(piping)

RISK OF EXPLOSION

Compressor must be
stopped before removing
refrigerant pipes.
All service valve must be
fully closed after pumping
down operation.

WARNING

●

Do not use means to accelerate the defrosting process or to clean, other than those recommended by the

manufacturer. Any un

t method or using incompatible material may cause product damage, burst and serious

injury.

●

The appliance/pipe-work shall be stored in a well ventilated room with indoor

oor area larger than A

min

[refer

to Table 1] and without any continuously operating ignition source. Keep away from open

ames, any operating

gas appliances or any operating electric heater. Else, it may explode and cause injury or death.

●

The appliance/pipe-work shall be installed, and/or operated in a room with

oor area larger than A

min

[refer to

Table 1] and keep away from ignition sources, such as heat/spark/open

ame or hazardous areas such as gas

appliances, gas cooking, reticulated gas supply systems or electric cooking appliances, etc.

●

Do not pierce or burn as the appliance/pipe-work is pressurized. Do not expose the appliance/pipe-work to heat,

ame, sparks, or other sources of ignition. Else, it may explode and cause injury or death.

WARNING

Table 1: Minimum Floor area of the room A

min

)

Minimum Floor Area of the room

min

)

RAF-**RXE

RAD-**QPE
RAD-**RPE

RAI-**RPE

RAK-**QPE
RAK-**RXE
RAK-**RPE

Max

refrigerant

charge

amount

(kg)

Max

Piping

Length

(m)

Outdoor

Model

RAM-90NP5E

2.40

5.49

3.68

49.42

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

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.

●

Do not install outdoor unit facing strong wind direction. It may

damage the fan motor.

●

Do not install the outdoor unit in a place where small animals
may build their nests. If small animal goes inside the unit and
touches the electrical parts, failure of the unit, smoke or

re may

be caused. Request your customer to keep the surrounding of
the unit is clean.

OUTDOOR UNIT

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.

●

This appliance must be earthed.

●

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

WARNING

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.

Height difference

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

Piping length

(L1 + L2 + L3 + L4 + L5) = Maximum 75m

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

R32 at 15 gram per every meter exceeds

Flare adaptor for piping

The

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

●

ø12.7(1/2”)

➝

ø 9.52 (3/8”)

Parts number TA261D-6 002

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