Hitachi RAD-18QPB, RAD-25QPB, RAD-50QPB, RAD-35QPB Installation guide

FOR SERVICE PERSONNEL ONLY

INVERTER SYSTEM MULTI TYPE INDOOR UNIT INSTALLATION MANUAL

HITACHI

MODEL

RAD-18QPB RAD-25QPB RAD-35QPB RAD-50QPB

(Mark is exclusive use tool for R410A)

l + – Screwdriver l Measuring Tape l Knife l Saw l ø 65mm Power Drill l Hexagonal Wrench

Key (

4mm) l Wrench (14, 17, 22, 26mm) Gas

Leakage Detector

l Pipe Cutter l Putty l Vinyl Tape

l Pliers l Flare Tool Vacuum Pump Adapter

Manifold Valve Charge Hose Vacuum Pump

Carefully read through the procedure before starting installation work.

The sales agent should inform customers regarding the correct operation of installation.

Explanation for outdoor unit is in “How To Use” (Instruction Manual) that is packed with outdoor unit.

Tools Needed For Installation Work

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.

SAFETY PRECAUTION

l Read the safety precautions carefully before operating the unit. l The contents of this section are vital to ensure safety. Please pay special attention to the following sign.

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

l 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.

l 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.

l 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.

l 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.

l 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.

l Observe the rules and regulations of the electrical installation and the methods described in the installation manual when

dealing with the electrical work. Use wire which is approved ofﬁ cial in your country. A short circuit and ﬁ re may occur due to the use of low quality wire or improper work.

l 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.

l Please use the speciﬁ ed components for installation work. Otherwise, the units may collapse or water leakage, electric shock

and ﬁ re may occur.

l When installing or transferring an air conditioner to another location, make sure that air other than the speciﬁ ed refrigerant

(R410A) does not enter the refrigeration cycle. If other air should enter, the pressure level of the refrigeration cycle may increase abnormally high leading to possibility of unit rupture.

l 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.

l 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.

l Be sure to use the speciﬁ ed piping set for R410A. Otherwise, this may result in broken copper pipes or faults.

l When installing or removing an air conditioner, 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.

CAUTION

l 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 3mm has to be installed. Without a circuit breaker, the danger of electric shock exists.

l 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.

l Please ensure smooth ﬂ ow of water when installing the drain hose.

l 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

l The unit should be mounted at stable, non-vibratory

location which can provide full support to the unit.

WARNING

l No nearby heat source and no obstruction near the air

outlet is allowed.

l The clearance distances from top, right and left are

speciﬁ ed in ﬁ gure below.

l The location must be convenient for water drainage and

pipe connection with the outdoor unit.

l To avoid interference from noise, please place the unit

and its remote controller at least 1m from the radio and television.

l To avoid any error in signal transmission from the remote

controller, please put the controller far away from highfrequency machines and high-power wireless systems.

Accessories to indoor Unit:

No. QuantityItem

Flare Insulator

Binder

4.0 x 10 Screw

Insulation Pipe

Aluminium Tape (large)

Band

Suspension Clamp (right, left) each

4.0 x 10 Screw

[Indoor unit installation]

CAUTION

Always install the indoor unit at level. If the indoor unit is inclined, water may leak.

Be sure to completely seal any gap with putty.

l The connecting pipe,

irrespective of the size, should all be insulated with insulation pipe and then wrapped with vinyl tape. (The insulator will deteriorate if it is not wrapped with tape).

Drain pipe Must be installed separately. Insulate indoor part of pipe to prevent condensation.

The indoor piping should be insulated with the enclosed insulation pipe. (If the insulator is insufﬁ cient, please use commercial products.)

l “Height difference” and “Piping length” of Indoor and Outdoor unit are different by Outdoor unit.

Please refer to the installation manual in Outdoor unit.

IA1171: A

1. RECOMMENDATION FOR INSTALLATION

l The ﬁ gures below are the recommended installation type for this duct model. l All the optional parts mentioned for each installation type and screws should be purchased locally prior to the installation.

Full duct type

Semi duct type

Need optional parts when installing full duct type (Local purchase)

Discharge grille

Chamber of discharge grille ø150mm

Chamber of discharge of unit side ø150mm

Chamber of suction of unit side ø150mm

Chamber of suction grille ø150mm

Suction grille with ﬁ lter

Flexible duct ø150mm 1m Flexible duct ø150mm 2m

Need optional parts when installing semi duct type (Local purchase)

Discharge grille

Chamber of discharge grille ø150mm

Chamber of discharge of unit side ø150mm

Suction grille

Flexible duct ø150mm 1m Flexible duct ø150mm 2m

Non duct type

2. Installation procedure and notice

Select the installation location carefully for the split type

air conditioner. It is very difﬁ cult to move a split type air conditioner after the ﬁ rst installation.

2.1 Make a hole on the wall as shown in Fig. 2-1.

l The hole on the wall

should be made with some inclination like Fig. 2-1 to keep the smooth ﬂ ow of condensed water.

2.2 Connecting pipe installation

l Seal the end of the pipes to prevent damage from

moisture and water.

2.3 Drain pipe installation

l Use PVC pipe VP20 (O.D. 25mm) for drain pipe.

l You must roll an insulation (thickness 10mm or more) over the indoor section of the drain pipe. l Position the drain pipe in the downward direction to enable free-ﬂ ow of water. Fix it with a hanger and avoid twisting the pipe as

shown in Fig. 2-3.

2.4 Installation method of unit type

INSTALLATION OF FULL DUCT TYPE

l Select the indoor unit position, ﬁ xing direction of air outlet so

that cool/hot air reaches all the room. Standard position of the indoor unit is with the wall side on the ceiling.

l Remove the factory ﬁ tted ﬁ lter and ﬁ lter holders before installing

of full duct type.

l Secure the space for installation, inspection or servicing. l Apply water-proof treatment to back surface of ceiling under the indoor unit, to prevent water drop. l Do not allow any obstacle to block air ﬂ ow within 1m of suction grille.

l Permissible length and bending of duct.

Discharging side duct

Suction side duct

Permissible length

4m or less added to suction side

1m or less

Bending

90° or less, 1 section

45° or less, 1 section

Other optional parts for display panel wired remote controller & wireless remote controller SPX-RCDA & SPX-RCKA1

Display panel 1

Panel installation plate 1

Panel cover 1

Remote controller (wireless) 1

Remote Controller Holder 1

3.1 x 16 screw 2

Wired Remote Controller with 2 screws 1

Item QuantityNo.

Need optional parts when installing non duct type (Local purchase)

Discharge grille

Discharge duct

Suction grille

Electrical box

Air outlet

Filter

Wired remote controller

Air inlet

2 ~ 5mm

65mm

Outdoor side

Large diameter pipe

Small diameter pipe



Insulation pipe

Stagnant water

No trap

No insulation

Do not do the installation as shown as above

Seal

Downward 1/25 ~ 1/100

Insulation

(Thickness 10mm or more)

Tape

(Unit : mm)

Fig. 2-1

Fig. 2-2

Fig. 2-3

Indoor side

GAS

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(5) Installation of indoor unit

• Set nut and washer on suspension bolt and hook it to suspend clamp by lifting the indoor unit.

• Make sure that the indoor unit is leveled using a level or vinyl hose with water.

• Fix the indoor unit so that the space between bottom surfaces of ceiling and indoor unit is 58mm.

[Installation of chamber of suction grille] [Installation of chamber of discharge grille] [Installation of suction grille] [Installation of discharge grille] [Installation of flexible duct] Refer to installation manual of optional part.

• Select the indoor unit position, ﬁ xing direction of air outlet so that cool/hot air reaches the entire room. Standard position or the indoor unit is on wall side.

• Permissible length and bending of duct.

Permissible length Bending

Discharging

side duct

4m or less

90° or less,

1 section

• Secure the space for installation, inspection or servicing.

• Apply waterproof treatment under the indoor unit to prevent water leak.

• Make sure that no obstacle is blocking the air ﬂ ow within 1m of suction grille.

(1) Installation ﬁ gure

(2) Opening on ceiling and suspension bolt position

• Indoor unit

(1) Installation ﬁ gure

(2) Opening on ceiling and suspension bolt position

• Indoor unit

• Chamber of suction grille

• Chamber of discharge grille

• Arrange drain pipe, refrigerant pipe, and connecting cord in their installation position.

• For ﬁ nishing of opening on ceiling, arrange with builder in detail.

(3) Installation of suspension bolt

• Make sure to reinforce furring of ceiling (frame: ceiling joint and supporter) to maintain level of ceiling and prevent vibration of ceiling plate.

• Suspension bolts should be purchased in the ﬁ eld.

• Refer to diagrams shown below for length of suspension bolts.

(4) Preparation for installing indoor unit

• Remove the screw  of the electric box and then remove electric box.

• Relocate the electric box with lead wires kept connected. Ensure the lead wire is positioned at the upper side, and hook the claw of electric box to the bottom of the indoor unit using 4 screws.

• Install 4 suspension clamps at both sides of indoor unit, 2 clamps at each side, using 8 tapping screws



. (Since size of left and right clamps are different for certain parts, refer to diagram on the right.)

• Install chamber of discharge of unit side on the indoor unit using 10 tapping screws.

• Remove the ﬁ lter at the bottom side of indoor unit by unscrew 8 screws at the ﬁ lter holders. (4 portions)

• Remove 6 screws at back plate of indoor unit. Then install the back plate at the bottom of indoor unit using 6 screws.

• Remove 2 screws at top plate of indoor unit and install chamber of suction of unit side using 7 screws.

CAUTION

• Be sure to install the indoor unit level. If the indoor unit is inclined, water may leak.

• If space between bottom surfaces of indoor unit and ceiling is not correct, there may be a gap between grille and ceiling surface, with consequent leakage of condensed water.

• In case of wooden frame • In case of steel frame

INSTALLATION OF SEMI DUCT TYPE

Opening on ceiling 96

Flexible duct

Chamber of discharge grille

Cross section

Front view

Plan view

Side view

Top view

Cross section

Plan view

Side view

Top view

Chamber of suction of unit side

Chamber of

suction grille

Chamber of discharge

of unit side

Opening on ceiling 864

Indoor unit

Suspension bolt 790

Suspension bolt 793

Opening on ceiling 960

Suspension bolt 740

Discharge opening size (846 x 96)

Suction opening size (960 x 233)

(Unit : mm)

Suction grilleDischarge grille

Suspension bolt (M10: Local purchase)

Reinforcement

Ceiling

Suspension bolt (M10: Local purchase)

Above 300

Above 300 Above 300

Opening on ceiling

60~90mm square piece of lumber

Nut

Reinforcing bar

C type metal

H beam

Nut

Ceiling

Suspension bolt (M10)

Indoor unit

Chamber of discharge of unit side

Screw

Bend slip-preventive metal

Opening on ceiling 846

Opening on ceiling 960

Suspension bolt 790

Indoor unit

Suspension bolt 740

Angle

Hanger bolt

Concrete

Long nut

Insert (100~150kg)

150~160mm

About 130

Above 200

Above 300

Opening on ceiling 960

Suspension bolt 793

Grille 980

Grille

253

Above 300

Reinforcement

Above 330

Opening on ceiling 233

Indoor unit

Back plate

Indoor unit

(1) Bottom side suction opening

(2) Back side suction opening

A level

Suspension bolt (M10) (Local purchase)

Hexagon nut (M10) (Local purchase)

Washer (Local purchase)

58mm

Ceiling

Filter holders

Filter

Top plate

Remove the screw

Screws to fit electric box

Chamber of suction of unit side

Screw

Suspension bolt 347

Suspension bolt position 740

Suspension bolt position 793

Opening on ceiling 96

Flexible duct

Chamber of discharge of unit side

Suction grille

Suction opening size (960 x 520)

Chamber of discharge grille

Above 300

Above 200

Above 300

Discharge grille

Discharge opening size (846 x 96)

Suspension bolt 347

Suspension bolt position 790 x 347

Suspension bolt (M10: Local purchase)

Opening on ceiling

(Unit : mm)



Left side

suspension clamp (2)



Right side

suspension clamp (2)

Screw

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