Hitachi RAM-36NP2A 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  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.

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  gures indicates prohibition.

 

Be sure to tighten the  are nut to the speci ed torque using a torque wrench. If the  are nut is tightened excessively, it may 
crack as time elapses, cause refrigerant leakage.

!
!

SPLIT UNIT AIR CONDITIONER 

INSTALLATION MANUAL

 

 

 Outdoor 

Unit 

RAM-36NP2A

( 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 ed technician to install your unit. Water leakage, short circuit or  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 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.

 

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  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.

 

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. Piping shall be suitable supported with a maximum spacing of 1m between the supports.

 

Please ensure smooth  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 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.

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.

2

Bush

Qty

No.

Item

Bush

1

10

11

12

Height difference

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

Piping length

(L1 + L2) = Maximum 35m

Minimum piping length for each indoor unit is 5m.
Maximum piping length for one indoor unit is 25m.
     Additional charge of refrigerant is not required.

 

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.

One unit of 1.8kW, 2.5kW, 3.5kW

One unit of 1.8kW, 2.5kW, 3.5kW

 

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.

 

To the outdoor unit, up to two indoor units can be connected until 
the total nominal cooling capacity not more than 6.0 kW.

 

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

[Outdoor unit installation]

CAUTION

●  

Make sure to connect to 
two indoor units.

!

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

No.

Material

Speci cation

1

Copper tube

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

2.0-2.5kW

Small dia.

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

Large dia.

2

Flare nut

Flare nuts with 6.35mm O.D..

2.0-2.5kW

Small dia.

Flare nuts with 9.52mm O.D..

Large dia.

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

Refrigerant 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  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.)

 

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  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 cult to move from place

 

to place after the  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  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.

Fuse Capacity

16A time delay fuse

Arrange power cord so they do 
not touch service valve.

Bind connecting cords to make them
 t between the convex sections.

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

Earth line

 IMPORTANT

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

!

Cable length

up to 

1

6m

up to 15m
up to 25m

Wire cross-section

1.5mm

2

2.5mm

2

4.0mm

2

IMPORTANT

WARNING

   

Connect the Connecting Cord to C1 and D1 “Indoor 1” for indoor unit 
1, C2 and D2 “Indoor 2” for indoor unit 2.

!

Fig. 3-1

Fig. 3-3

<

IA960: A 

>

DRAIN PIPE

BASE

Note:

  Outdoor supply cords shall not 

be lighter than polychloroprene 
sheathed  exible cord with code 
designation 60245 IEC 57.

!

CAUTION

Pull downward

INS RAM-36NP2A   1

3/28/13   10:54 AM

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