Hitachi RAM-72Q5 installation manual IA93 A, For Service Personnel Only, Safety Precaution

FOR SERVICE PERSONNEL ONLY

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

No. Material Specification

SPLIT UNIT AIR CONDITIONER

INSTALLATION MANUAL

Outdoor Unit HFC RAM-72Q5

R410A

SAFETY PRECAUTION

●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

(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

		4.0kW or less	Small dia.	Deoxidized annealed copper pipe with 6.35mm O.D., 0.8mm wall thickness.
1	Cooper tube		Large dia.	Deoxidized annealed copper pipe with 9.52mm O.D., 1.0mm wall thickness.
		5.0kW or more	Small dia.	Deoxidized annealed copper pipe with 6.35mm O.D., 0.8mm wall thickness.
			Large dia.	Deoxidized annealed copper pipe with 12.7mm O.D., 1.0mm wall thickness.
		4.0kW or less	Small dia.	Flare nuts with 6.35mm O.D..
2	Flare nut		Large dia.	Flare nuts with 9.52mm O.D..
		5.0kW or more	Small dia.	Flare nuts with 6.35mm O.D..
			Large dia.	Flare nuts with 12.7mm O.D..
				Foamed polyethylene insulation pipe which does not corrode the copper tube.
3 Insulation for refrigerating pipe				Large dia. pipe side: 15mm I.D.., 8mm wall thickness.
				Small dia. pipe side: 8mm I.D., 7mm wall thickness.

●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.

Make sure to connect earth wire.

This sign in the figures indicates prohibition.

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
●	Please request your sales agent or qualified technician to install your unit. Water leakage, short circuit or fire 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 fire.
●	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 specified wire for connecting the indoor and outdoor units. Please ensure that the connections are tight

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

1.1Outdoor 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	●	This appliance must be earthed.
	●	Power is supplied through outdoor unit, do not connect power source to indoor unit.

	after the conductors of the wire are inserted into the terminals. Improper insertion and loose contact may cause over-heating
	and fire.
●	Please use the specified components for installation work. Otherwise, the units may collapse or water leakage, electric shock
	and fire may occur.
●	Be sure to use the specified piping set for R-410A. Otherwise, this may result in broken copper pipes or faults.
●	When installing or removing an air conditioner, only specified 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 fire, 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 fire in the fan-driven heater, space heater, etc., a poisonous gas may occur.
●	Unauthorized modifications to the air conditioner may be dangerous. If a breakdown occurs please call a qualified air conditioner
	technician or electrician. Improper repairs may result in water leakage, electric shock and fire, etc.

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 difficult to move from place to place after the first installation.

3.1Wiring

(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 fixed by the band which is located near the terminal board.

3.2Connection 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)

30mm

Green-and-yellow (ground)

10mm

10mm 55mm

Power cord and connecting cord

Detail of cutting power cord

● 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.

!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.

●Do not install the unit near a location where there is flammable gas. The outdoor unit may catch fire if flammable

gas leaks around it.

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

●Please ensure smooth flow 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 specified in figure 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 flammable 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.

Procedures of Wiring

Wiring Pattern

Indoor Unit

60mm

Green-and-yellow (ground)

10mm

Indoor unit No. 1

Indoor unit No. 2

Indoor unit No. 3

Indoor unit No. 4

Screw for ground, earth screw

Screw for ground, earth screw

Screw for ground, earth screw

Screw for ground, earth screw

10mm

85mm

Connecting cord

Terminal board

Terminal board

Terminal board

Terminal board

For Indoor Unit No. 1 (C1, D1),

C

D

C

D

C

D

C

D

Indoor Unit No. 2 (C2, D2),

Indoor Unit No. 3 (C3, D3) and

Green-and-

Green-and-

Green-and-Yellow

Green-and-Yellow

Indoor Unit No. 4 (C4, D4)

Yellow

Yellow

Screw for ground,

Fig. 3-2

earth screw

Terminal board

C1

D1

C2

D2

C3

D3

C4

D4

L

N

Terminal board

Terminal board

Terminal board

Terminal board

Screw for ground, earth screw

Screw for ground, earth screw

Screw for ground, earth screw

Screw for ground, earth screw

For Indoor unit No. 1

For Indoor unit No. 2

For Indoor unit No. 3

For Indoor unit No. 4

Power cord

Green-and-Yellow

Outdoor Unit

Fig. 3-1

!WARNING

●The naked part of the wire core should be 10 mm and fix 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 3x1.5mm2. (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 220-240V between the L and N terminals. Therefore, before servicing, be sure to remove the plug from the AC outlet or switch off the main switch.

Wiring of The Outdoor Unit

● Please remove the side cover for wire connection.

Dimension of Mounting Stand

of the Outdoor unit

(unit: mm)

mounting stand	57	10
		320	340
		35
12		(10)
35
508	198

Figure showing the Installation of Outdoor Unit.

Height difference		Piping length
Height difference between indoor units should		Indoor unit 1 Indoor unit 2 Indoor unit 3			Indoor unit 4
be not more than 5m.
Indoor unit 3 Indoor unit 4	Outdoor unit	L1	L2	L3	L4

Indoor unit 2

Indoor unit 1

Outdoor unit

(L1 + L2 + L3 + L4) = Maximum 60m

Minimum piping length for each indoor unit is 5m. Maximum piping length for one indoor unit is 25m.

In case the pipe length is more than 30m, add refrigerant R410A at 20 gram per every meter exceeds.

● If you cannot attach the side cover due to the connecting cord, press the connecting cord in direction to the front panel
!	to fix it.
	Be sure that the hooks of the side cover is fixed in certainly. Otherwise water leakage may occur and this causes short
●

WARNING	circuit or faults.
	● The connecting cord should not touch to service valve and pipes. (It becomes high temperature in heating operation.)

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.

IMPORTANT

Cable length	Wire cross-section	! WARNING
up to 16m	1.5mm2
		● Connect the Connecting Cord to C1 and D1 “Indoor 1” for indoor unit 1,
up to 15m	2.5mm2	C2 and D2 “Indoor 2” for indoor unit 2, C3 and D3 “Indoor 3” for indoor
up to 25m	4.0mm2	unit 3, C4 and D4 “Indoor 4” for indoor unit 4.

￿ 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.

500

Pull downward

Bind connecting cords to make them
fit between the convex sections.
Connect the
earth cord
AC 220V — 240V ONLY
L N	INDOOR 1	INDOOR 2	INDOOR 3	INDOOR 4
	C1 D1	C2 D2	C3 D3	C4 D4

[Outdoor unit installation]

￿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.

	unit 1	One unit of 1.8kW, 2.5kW,
port	Indoor
		3.5kW or 5.0kW
connection	unitIndoor2
		One unit of 1.8kW, 2.5kW, 3.5kW or 5.0kW
		(5kW unit: Optional flare adaptor for piping is necessary.)
Outdoor unit pipe	unit 4 Indoor unit 3	One unit of 1.8kW, 2.5kW, 3.5kW, 5.0kW or 6.0kW
		(5kW, 6kW unit: Optional flare adaptor for piping is necessary.)
		One unit of 1.8kW, 2.5kW, 3.5kW, 5.0kW or 6.0kW
	Indoor	(2.5kW, 3.5kW unit: Optional flare adaptor for piping is necessary.)

!CAUTION

●Make sure to connect to two or more indoor units.

Flare adaptor for piping

The flare 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

	After remove the screw
	and cover, put the
	connecting cords and fix
	the cover with screw.
	! CAUTION
	Arrange power cord so they do
	not touch service valve.
Earth line	Fig. 3-3
Type of grounding rod	Length
SP-EB-2	900mm

Grounding rod (optional)

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

●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.

￿To the outdoor unit, up to four indoor units can be connected until the total value of each units’s capacity reaches 11 kW.

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

<IA93: A >

IMPORTANT

Fuse Capacity

30A time delay fuse