Hitachi RAM-33NP2B Installation manual

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 speciﬁ 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-33NP2B

(Mark is exclusive use tool for R410A)

●

+ – 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 qualiﬁ 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 modiﬁ cations to the air conditioner may be dangerous. If a breakdown occurs please call a qualiﬁ 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 speciﬁ 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 speciﬁ 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 speciﬁ ed piping set for R-410A. Otherwise, this may result in broken copper pipes or faults.

● When installing or removing an air conditioner, only speciﬁ 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.

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

● 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

● 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 speciﬁ 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

Dimension of Mounting Stand

of the Outdoor unit

(unit: mm)

Figure showing the Installation of Outdoor Unit.

Bush

QtyNo. Item

Bush

Height difference

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

Piping length

(L1 + L2) = Maximum 20m Minimum piping length for each indoor unit is 3m. Maximum piping length for one indoor unit is 20m. 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 1.5kW, 1.8kW, 2.5kW

 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 5.0 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 indoor units.

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

No. Material Speciﬁ cation

Copper tube

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

1.5-2.5kW

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 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 3x1.5mm

(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 difﬁ 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 regulator is recommended.

Circuit Breaker

16A

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

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

WARNING

●

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

Fig. 3-1

Fig. 3-3

IA1187: A

DRAIN PIPE

BASE

Note:

● Outdoor supply cords shall not

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

CAUTION

Pull downward

Procedures of Wiring

Cable type

3 Core

Cable type

4 Core

Cable length

up to 25m

Wire cross-section

2.5mm

Wire cross-section

1.5mm

For (Power cord - L, N, Earth)

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

Arrange power cord so they do not touch service valve.

CAUTION

IMPORTANT

! !

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4. Preparation of Pipe

● Use a pipe cutter to cut the copper pipe.

● Before ﬂ aring, please put on the ﬂ are nut.

Outer Diameter (Ø)

6.35 (1/4”)

9.52 (3/8”)

For R410A tool

~ 0.5mm

For R22 tool

A (mm)

● Recommend to use

R410A ﬂ aring tool.

1.0mm

Outer diameter of pipe (Ø)

Torque N·m (kgf · cm)

Small diameter side

● Please be careful when bending the copper pipe.

● Screw in manually while adjusting the center. After that, use of torque wrench to tighten the connection.

Large diameter side

6.35 (1/4”)

13.7-18.6 (140-190)

9.52 (3/8”)

34.3-44.1 (350-450)

Small diameter side

Large diameter side

6.35 (1/4”)

19.6-24.5 (200-250)

9.52 (3/8”)

19.6-24.5 (200-250)

Valve head cap

12.3-15.7 (125-160)

Valve core cap

CAUTION

● In case of removing ﬂ are nut of a indoor unit, ﬁ rst remove a nut of small diameter side, or seal cap of

large diameter side will ﬂ y out. Free from water into the piping when working.

● During connection, keep away from water.

● Be sure to tighten the ﬂ are nut to the speciﬁ ed torque using a torque wrench. If the ﬂ are nut is tightened

excessively, it may crack as time elapses, causing refrigerant leakage.

● Install the unit in a stable place to minimize vibration or noise.

● After arranging the cords and pipes, secure them in place.

Gas leakage inspection

Please use gas leakage detector to check if leakage occurs at connection of ﬂ are nut as shown on the right. If gas leakage occurs, further tighten the connection to stop leakage. (Use the detector provided for R410A)

Tighten all the way by hand.

Do not tighten all at once, but tighten it while ﬁ tting the ﬂ ared surface to the pipe.

5. Pipe Connection

5.1 Pipe connection Connecting the pipe to outdoor unit

(1) Remove the ﬂ are nut and seal cap from the service valve. (2) Apply refrigerator oil to the service valve and the ﬂ ared portion of the pipe. (3) Using a wrench, security tighten.

● Jagged edge will cause leakage.

● Point the side to be trimmed downwards during trimming

to prevent copper chips from entering the pipe.

7. 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.

● If the indoor unit does not operate, check to see that the connections are correct.

CAUTION

●

Trial run should be conducted on one unit at a time to check for incorrect wiring of connecting cord.

6. Removal Of Air From The Pipe And Gas Leakage Inspection

6.1 Air purging by using vacuum pump

Fig. 6-1

Fig. 6-2

Fig. 6-3

CAUTION

IA1187: A

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