HITACHI RAK-SJ24HNV Split Unit Air Conditioner Instruction Manual

HITACHI RAK-SJ24HNV Split Unit Air Conditioner

Product Information

The HITACHI Split-Unit Air Conditioner is a cooling device that is installed in two separate units, the indoor unit and the outdoor unit. The indoor unit is named RAK-SJ24HNV and requires a narrow refrigerant pipe with an outer diameter of 06.35mm for liquid and  wide refrigerant pipe with an outer diameter of 015.88mm for gas The indoor unit comes with tools needed for installation work, including a mounting plate, screws, a holder for the remote controller, AAA size battery, and a purifying filter. There are six directions allowed for mounting the holder for remote controller.

Product Usage Instructions

For service personnel only:

• Read the safety precautions carefully before operating the unit.
• Improper installation may result in serious consequences. 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.
• Forming piping downward at the left of the unit is not allowed.
• Completely seal any gap with putty.
• All pipes, no matter big or small, should all be insulated with insulation pipe and then wrapped with plastic tape. The insulator will deteriorate if it is not wrapped with tape.
• Use insulated drain hose for the indoor piping (commercial product).

The Choice of Mounting Site

Please note the following matters and obtain permission from customer before installation. Mounting on the wall directly is allowed.

Installation of Hanger, Wall Penetration, and Installation of Protection

Pipe

Follow the instructions provided in the user manual for installing the hanger, wall penetration, and protection pipe.

Installation of Indoor Unit

Follow the preparation and installation steps provided in the user manual for installing the indoor unit. Make sure to mount the indoor unit vertically downward piping.

FOR SERVICE PERSONNEL ONLY

HITACHI
HITACHI SPLIT-UNIT AIR CONDITIONER INSTALLATION MANUAL

~

Indoor Unit

RAK-SJ24HNV

· 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

8 · (±)

Screwdriver · Measuring Tape · Knife

IO · Saw · Pipe Cutter · Hexagonal Wrench Key ( 4mm)

~ · Power Drill (065mm 080mm) · Vacuum Pump

· Pliers or Wrench · Torque Wrench · Vacuum Pump Adaptor

· Flare Tool · Gas Leakage Detector · Manifold Valve

· Charge Hose · Reammer · File

THE CHOICE OF MOUNTING SITE (Please note the following matters and obtain permission from customer before installation). ~ WARNING
· The unit should be mounted at stable, non-vibratory location which can provide full support to the unit.
~CAUTION
· No nearby heat source and no obstruction near the air outlet is allowed. · The clearance distances from top, right and left are specified in figure below. · The location must be convenient for water drainage and pipe connection with the outdoor unit. · To avoid interference from noise please place the unit and its remote controller at least 1 m from the radio, television and
inverter type fluorescent lamp. · To avoid any error in signal transmission from the remote controller, please put the controller far away from high- frequency
machines and high-power wireless systems. · The installation height of indoor unit must be 2.3m or more.

Refrigerant pipe size (outer diameter): Narrow pipe, Liquid (06.35mm); Wide pipe, Gas (015.88mm)
,… 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 …….. 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
· Flare nut must use a torque wrench without fail. Tighten with the specified tightening torque. If the flare nut is tightened too much, after a long period of time, the flare nut breaks, Gas leakage, stagnation, touching fire, 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 fire, rarely cause ignition.
· 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 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 R410A. 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. 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 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.
· Be sure to install a ground fault circuit interrupter. Failure to install a ground fault circuit interrupter may result in electrical shocks or fire.
· This appliance is not intended for use by persons (including children) with reduced physical sensory or mental capabilities or lack of experience and knowledge, unless they have been given supervision or instruction ooncerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.
· Appliance shall be installed in accordance with national wiring regulations.

&, CAUTION
· A circuit breaker must be installed. Without a circuit breaker or fuse the danger of electric shock exists. A main switch with a contact gap of more than 3mm has to be installed in the power supply line to the outdoor unit.

g-

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flammable gas leaks around it.

· Do not install the indoor unit in a machine shop or kitchen where vapor from oil or its mist flows 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 flow of water when installing the drain hose.

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

Names of Indoor Components

No. Component’s Name

Qty

Mounting Plate

(D

Screw for Mounting Plate
e=-, (4.1×32) 6
Holder for Remote Controller
®

There are 6 directions allowed, namely, horizontally perpendicular to the unit, vertically down from right, horizontally out from right, horizontally out to left, horizontally out to right, vertically down from left. Don’t form the piping downward at the left of the unit.

AAA Size Battery

©

~

2

Screw for holder of
Remote Controller
® @illI> 2 (3.1×16)

Remote Controller
® o D OoD DODO

Purifying Filter
(j) \’l “~ 2

Be sure to completely seal any gap with putty.

Figure showing the Installation of Indoor
The indoor piping should be insulated with the enclosed insulation pipe. (If the insulator is insufficient, please use commercial products). · The connecting pipe,
no matter big or small, should all be insulated with insulation pipe and then wrapped with plastic tape. (The insulator will deteriorate if it is not wrapped with tape).
The connection of insulated drain hose.
inner diameter 016mm
~
Please use insulated drain hose for the indoor piping (commercial product).

a Installation of Hanger, Wall Penetration and Installation of Protection Pipe
~ CAUTION
· The draining of the water container inside the indoor unit can be done from the left. Therefore the mounting plate must be fixed horizontally or slightly tilted towards the side of drain hose. Otherwise, condensed water may overflow the water container.
Direct Mounting On The Wall
· Please use hidden beams in the wall to hold the mounting plate.

El Installation of the Indoor Unit
VERTICALLY DOWNWARD PIPING

( Preparation )

· Connect connecting cord. · Pull out the pipe, connecting cord and drain hose.

( Installation )

· The upper part of the indoor unit is hanged on the mounting plate.

· The projection at the lower part of the indoor unit is hooked onto the mounting plate.

‘-..u–=:: ,~ Mountingplate .

[

“r.JJ ]

Mounting plate

‘<;:::::62:q·-:,:-=,-:-:zPl·;i;p;;e,.1:=,

then force it downwards.

·· · :’ · -·

it CAUTION
Please pull the lower part of the indoor unit outwards to check if the unit is hooked

Protection/’n

~

onto the mounting plate.

Improper installation may

Pipe Drain Hose Connecting card

. . Pr0Ject1on

cause vibration and noise.

Screw for Mounting Plate
Please use more than 4 screws.

-+- Mounting
plate

HOW TO REMOVE INDOOR UNIT

· Push up the (PUSH) sections at the bottom of the indoor unit and pull the bottom plate towards you. Then the claws are released from the stationary plate.
(The (PUSH) sections are indicated by 2 arrows in the right figure)

/g
[Push] mark positions

Hole for pipe

HORIZONTAL PIPING
( Preparation )

Procedures of Installation and Precautions

· Procedures to fix the mounting plate.

1. Drill holes on wall. 2. Push plug into the holes. 3. Fix the mounting plate on wall

(As shown below)

(As shown below)

with 4.1 x 32 screw

(As shown in figure below)

II E
E
a,
i ~

G)Mount;agplaJe Plug
@Screw–.
~

Ceiling II/I/Ill/II/Ill/Ill/Ill I I I I I

Change of Drain Hose and Installation Procedures. · Exchange the location of drain hose and drain cap during horizontal piping as shown in
figure below. Be sure to plug in the drain hose until the insulating material folds upon itself.

· Please use pliers to pull ~

out the drain cap.

(This is an easier way to

,

remove the drain cap).

“”.-

Lt, CAUTION
For horizontally out to right piping
IZI GOOD
For right piping, follow the instruction as below:
· Press the upper side of clamp

32mm

Wall

~

4. 1 x 32 Screw

· Procedures to fix the holder of remote control.

1. Drill holes on wall. 2. Push plug into the holes.

(As shown below)

(As shown below)

@Remote Control Holder

Draiacap~
· Remove the cap for drain hose installation

,Drain hose ………….. ~ : : : ~
~’Drain hose~ —-~

· Unfold the pipe to downward slowly.
~
· Bend the pipe to the right side of chassis.

Plug

Wall Penetration and Installation of Protection Pipe

· Drill a 065mm hole on
wallwhichisslightlytilted towards the outdoor side. Drill the wall at a small angle. · Cut the protection pipe according to the wall thickness. · Empty gap in the sleeve of protection pipe should be completely sealed with putty to avoid dripping of rain water into the room.

llndoorl

!Outdoor!

~ WARNING

2~5mm
Sleeve of protection pipe

Be sure that the wire is not in contact with any metal in the wall. Please use the protection pipe as wire passing through the hollow part of the wall so as to prevent the possibility of damaged by mouse. Unless it seals completely, any air with high humidity flows from outdoor and dew may drop.

Drain cap shall be fully tightened by pushing with Hexagonal wrench key when changing location.

liJ BAD
Following bending from left to right directly could cause damage to pipe.

Drain hose Please insert until here
Condensed water may leak out if not inserted properly.

INSTALLATION OF REFRIGERATING PIPES AFTER CONNECTION

· The refrigerating pipes should be adjusted to fit into the hole on the wall and then ready for further connection.
· The terminals of 2 connected pipes must be covered with insulator used for terminal connection. Then the pipes are wrapped with insulation pipe.
· Connect the connecting cord after removing electrical cover. (Refer to “CONNECTION OF POWER CORD”)
· After adjustment, fit the connecting cord and pipes into the space available under the indoor unit.
· When connection is at left side, refrigerating pipe and cabinet shall be tied together. Failing to do so may cause the unit bottom side become warping. Excess binder shall be cut to prevent abnormal sound and water dripping.
Hook portion for binder tightening

Insulation pipe (must be wrapped with vinyl tape at every 120mm.

Binder

~

Refrigerating

~Pipe

Hook/ ‘

,, Insulator Drain Hose

Drain hose
‘ ~ . · {:..·,,··~

it CAUTION

· The rubber strap used

for fixing the insulator

should not be tied with

great force. Otherwise,

this will damage heat

insulation and causes

water condensation.

~

Pipe

Rubber strap tied

with great force

THE CONNECTION OF REFRIGERATING PIPE DURING THE INSTALLATION OF INDOOR UNIT

( Preparation To Install Refrigerating Pipes )
· The refrigerating pipes and connecting cord arrangement are attached.
· The end of the refrigerating pipes are at locations
marked with ” V” symbol.

~CAUTION
· Please fix in the plastic core after flaring to avoid copper chips entering the pipes.

~~JJIJIIIIJlllll£1%{:lf ~w
Please bend at a small radius to form an arc

0.85m
( Installation )
Hang the Indoor unit onto the mounting plate. Use the temporary stand at the back of the Indoor unit to push its lower part 150mm forwards. · Place the drain hose through the hole on the wall. · Wrap the refrigerating pipes with insulation pipe after
connecting refrigerating pipe. · Connect the connecting cord after removing electrical cover.
(Refer to “Connection of Power Cord”) · After adjustment, the connecting cord and refrigerating pipes
are placed into the space available under the Indoor unit. · The projection of Indoor unit must hook to the mounting plate.

~~mg-·
~
about 150mm

Heat insulation pipe

~

Connecting

~

corn

Refrigerating pipe

Pull this to the front during the connection of refrigerating pipes to ease task.

ni ‘ ,; ~-‘- El Installation of Drain Hose

i

~

,
f~.

~ :

I

ITT

tc

water pond

Bending

Condensed

upwards

water pond

-·

i’.tCAUTION
Be sure that the drain hose is not loosely connected or bend.

CAUTION

You are free to choose the side (left or right) for the installation of drain hose. Please ensure the smooth flow of condensed water of the Indoor unit during installation. (Carelessness may result in water leakage.)

<IA2156:@>

Preparation of Pipe

~ · Use a pipe cutter to cut the copper pipe.

~ ~ -Trim-mingtool
Copper pipe
‘

it. CAUTION
· Jagged edge will cause leakage. · Point the side to be trimmed downwards during trimming to prevent copper chips from entering the pipe.
· Before flaring, please put on the flare nut.

D~ ~A
Copper pipe

· Recommend to use R41 0A flaring tool

Outer Diameter mm (inch)
6.35 (1/4) 9.52 (3/8)

Thickness mm
0.8 0.8

Flare tool for R41 0A
Clutch type
0.0 ~ 0.5 0.0 ~ 0.5

Amm
Clutch type
1.0 ~ 1.5 1.0 ~ 1.5

Wing nut type
1.5 ~ 2.0 1.5 ~ 2.0

Pipe Connection

.1,CAUTI0N

In case of removing flare nut of an Indoor unit, first remove a nut of small diameter side, or a seal cap of big diameter side will fly out. Prevent water from entering into the piping when working.

~t

~f f Wrench

/l4__ Torque
)’~……_wrench

~

Outer diameter of pipe
mm (inch)

Small dia. side

6.35 (1/4″)

Large dia. side

9.52 (3/8″) 12.7 (1/2″)

15.88 (5/8″)

Small dia. side

6.35 (1/4″)

Valve head cap Large dia. side

9.52 (3/8″) 12.7 (1/2″)

15.88 (5/8″)

Valve core cap

Torque N.m
(kgf.cm)
13.70 ~ 18.60 (140 ~ 190) 34.30 ~ 44.10 (350 ~ 450) 44.10 ~ 53.90 (450 ~ 550) 49.00 ~ 58.80 (500 ~ 600) 19.60 ~ 24.50 (200 ~ 250) 19.60 ~ 24.50 (200 ~ 250) 29.40 ~ 34.30 (300 ~ 350) 29.00 ~ 31.00 (296 ~ 316) 12.30 ~ 15.70 (125 ~ 160)

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

L’.t,.WARNING
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.

( Lt WARNING I · THIS APPLIANCE MUST BE GROUNDED.
Procedures of Wiring
In case that power is supplied from Indoor Unit
Indoor Unit

Wiring Of The Indoor Unit

For wire connection of the indoor unit, you need to remove the front cover, the low cover under the body of the unit and terminal cover.
· Remove the cover from the terminal base and screw the cable.
3

Connecting Cord

Detail of cutting the connecting cord
Indoor Unit
Control line
Green+ Yellow (ground)
Lt WARNING
· The naked part of the wire core should be 10mm 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. If the supply cord is damaged, it must be replaced by the
manufacturer, its seivice agent or similarly qualified person in order to to avoid a hazard. · Please refer to the following for wire connection to the terminals of the units. The cabling must meet the standards of electrical installation. · There is a AC voltage drop between the L and N terminals if the power
is on. Therefore, before servicing, be sure to remove the plug from the AC outlet or switch off the main switch.

After remove the screw and terminal
cover, and put the
connecting cords and fix the terminal cover with screw.

Cord band

Method to remove electrical cover
· Remove the screw and electrical cover. · Insert the connecting cord (1, 2, 3) from the back of unit. · Fixed the wire to terminal wires firmly as shown as below.

Electrical cover

Sere
!l
D

Connecting cord

.1, WARNING
· Leave some space in the connecting cord for maintenance purpose and be sure to secure it with the cord band.
· Secure the connecting cord along the coated part of the wire using the cord band. Do not exert pressure on the wire as this may cause overheating or fire.

How to connect the optional parts

(Dry contact, H-Link/Wi Fi (optional}, Wired remote, Run status)

· For cable connection to control P.W.B., you need

CN7

to remove front cover and electrical box cover.

Each connecting location is as below.

G) Dry contact: CN6
® H-LINK/Wi Fi: CN7
@ Wired Remote Controller: CN18

@) Run status: CNS

· Please check and confirm manuals attached to each optional parts for more connection details.
· You can refer to this installation manual how to remove and re-attach the front cover.
· Please be careful not to damage lead wires by edge of plate when connecting the optional parts.

a Insulation And Maintenance Of Pipe Connection
· The connected terminals should be completed sealed with heat insulator and then tied up with rubber strap.
· Please tie the pipe and power line together with vinyl tape as shown in the figure showing the installation of indoor and outdoor units. Then fix their position with holders.
· To enhance the heat insulation and to prevent water condensation, please cover the outdoor part of the drain hose and pipe with insulation pipe.
· Completely seal any gap with putty.
Insulation material for pipe connection
~

Sleeve of
‘i protection/ ~ipe

:·: ,:
:. .

Putty

Putty

:i ::

El Power Source And Operation Test

( Power Source )

.1, CAUTION
· Please use a new socket. Accident may occur due to the use of old socket because of poor contact.
· Please plug in and then remove the plug for 2 – 3 times. This is to ensure that the plug is completely plugged into the socket.
· Keep additional length for the power cord and do not render the plug under external force as this may cause poor contact.
· Do not fix the power cord with U-shape nail.

( 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.

B Installation Of Remote Controller
· The remote controller can be placed in its holder which is fixed on wall or beam. · To operate the remote controller at its holder, please ensure that the unit can
receive signal transmitted from the controller at the place where the holder is to be fixed. The unit will beep when signal is received from the remote controller. The signal transmission is weaken by the florescent light. Therefore, during the installation of the remote control holder, please switch on the light, even during day time, to determine the mounting location of the holder.

( How to remove the front cover )
r==========~/··1 I ‘

_”‘t t r ” ‘ s.~============================================s=-~-~.,J

CD

CD

CD

The controller should be insert from top into bottom side of the holder as shown in figure below.
~
J~ Romom c,,.,m””
b – Screw (2 pieces)

~

Holder for Remote Controller

CD Remove the caps and unscrew at lower
portion of the front cover.

®

® ®

® Firmly press 4 hooks at top of front cover
by tools until the hook release from slot
® Pull the front cover to front side.

· How to check pipe bending.

– Compare bended pipe with the picture below.

– If bended pipe is not good enough, cut bended area and bend it again.

® all areas are smooth, no notching area

@ no scratch or mark inside

CD there are scratches around bending area

TI II

© all have the same length

® crack

@ phase of bending is too long

@ different length

® slanting

CD sample of bending pipe cannot be used

( How to attach the front cover )

CD
~ +

CD

CD CD
I +

CD To assemble front cover back to the unit,
certainly hook at upper portion (4 places).

(Li J ~f t @ ®@

t
®

@

® Insert the bottom of front cover into the
slot at “PUSH” marking and ensure bottom area is align from left to right.
® Tighten the screw and cover by caps (3
places)

Ti: Il
Q

<IA2156:@>

References

• kgf.cm

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