Hitachi RAI-25NH4, RAI-40NH4 Installation Manual
8
4
5
3
Maximum pipe length 20m
Minimum pipe length 5m
Pipe
Rubber strap tied with great force
FOR SERVICE PERSONNEL ONLY
!
300mm
or more
2500mm
or more
Air
outlet
Air
outlet
Air
outlet
Air
outlet
Air inlet
Air inlet
1000 mm
or more
1000 mm
or more
1000 mm
or more
1000 mm
or more
!
!
STATIC PRESSURE
DRAIN PUMP TEST
INSTALLATION
NORMAL NORMAL
NORMAL
HIGH
AIR FLOW SELECTION
3WAY
LOWTEST
HIGH PRESSURE
HIGH STATIC PRESSURE SW
This is used for increasing fan speed
according to the situation of the trial
operation inside the room with ceiling
height of 2.5m and above.
However noise gets slightly higher.
STATIC PRESSURE
NORMAL
HIGH PRESSURE
STATIC PRESSURE
DRAIN PUMP TEST
INSTALLATION
NORMAL NORMAL
NORMAL
HIGH
AIR FLOW SELECTION
3WAY
LOWTEST
HIGH PRESSURE
DRAIN PUMP TEST
NORMAL
TEST
AIR BLOW
SELECT SW
●
Carefully read through the procedures of proper installation
before starting installation work.
●
The sales agent should inform customers regarding the correct
operation of installation.
HITACHI SPLIT-UNIT AIR CONDITIONER
INSTALLATION MANUAL
Indoor Unit
HFC
R410A
RAI-25NH4
RAI-40NH4
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
●
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 specified wire for the connection 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 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.
!
CAUTION
●
A circuit breaker or fuse (16A time delay) 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.
●
Piping shall be suitable supported with a maximum spacing of 1m between the supports.
●
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.
●
For installation of front panel RAI-ECPL, please follow exactly the instruction in the manual.
●
Please ensure smooth flow of water when installing the drain hose.
Tools Needed For Installation Work
●
+ – Screwdriver ● Measuring Tape ● Knife
●
ø 65mm Power Drill ● Hexagonal Wrench Key ( 4mm)
●
Wrench (14, 17, 19, 22, 26, 27mm)
●
Pipe Cutter
●
Vinyl Tape ● Pliers ● Flare Tool
●
Gas Leakage Detector
●
Saw
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 1m 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
INDOOR UNIT
systems.
●
The installation height of indoor unit must be 2.3m or more.
Names of Indoor Components
QtyNo. Item
Insulation pipe for flare section
1
Binder
2
Holder for Remote Controller
3
AAA Size Battery
4
Screw for holder of Remote
Controller
5
Insulation pipe for drain pipe
6
Insulation pipe
7
Remote Controller
8
Drain Pipe
0
Pattern paper for positioning
plate
!
Pattern paper for installation
plate
@
Installation plate fixing
#
Blower cover
$
Bush
%
Corner Seal
^
(3.1x16)
screw
(M5 X 16)
2
4
1
2
2
1
1
1
1
1
1
4
2
4
3
For RAI-40NH4
Adaptor to Outdoor
&
Insulator
*
Be sure to
completely
seal any
gap with
putty.
QtyNo. Item
1
1
Figure showing the Installation of Indoor Unit.
CAUTION
The installation height
•
of indoor unit must be
2.3m or more in a
non public area.
The indoor piping
should be insulated
with the enclosed
insulation pipe. (If the
insulator is insufficient,
please use commersial
products).
● The difference in height
between the indoor and
outdoor unit should be kept
below 10m.
● The connecting pipe, no
matter big or small, 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.
●
●
●
Installation of suspension bolts
●
●
●
●
60 ~ 90mm square piece of lumber
INDOOR UNIT
Wall Penetration and Installation of Protection Pipe
●
●
●
Drain pipe installation
●
●
●
<
I304: B
1
Opening on ceiling and suspension bolt
650 (Panel)
600 (Opening on ceiling)
580 (Indoor unit)
400 (Suspension bolt)
Above 300
110
Panel (Optional part RAI-ECPM)
Ceiling
64
42
393 (Elec-box)
580 (Indoor unit)
600 (Opening on ceiling)
285
32
650 (Panel)
610 (Suspension bolt)
Narrow pipe Ø6.35
Wide pipe Ø12.7
230 (Drain)
227 (Electric box)
55
(Unit : mm)
97 (Drain)
65
42
Drain outlet
112 62
Air outlet
Air inlet Air outlet
Need a connecting work for refrigerant pipe, drain pipe and F cable in the ceiling after
suspending the indoor unit. Arrange drain pipe, refrigerant pipe and F cable in their installation
position.
For finishing of opening on ceiling, arrange with builder in detail.
If ceiling is already completed, connecting cables between indoor and outdoor, piping and
drain piping must be done before fitting indoor unit.
2
Preparation for installing indoor unit
Be sure to reinforce furring of ceiling (frame : ceiling joints and supporter) to maintain level
of ceiling and prevent vibration of ceiling plate.
Suspension bolts should be purchased in the field.
Refer to diagrams shown below for length of suspension bolts.
In case of wooden frame
Nut
Angle
110
About 75
Angle
Nut
Suspension
bolt (M10)
Ceiling
Drill a ø 65mm hole on wall which is slightly tilted 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.
●
In case of steel frame (Unit : mm)
150 ~ 160mm
Reinforcing
bar
110
Insert 980 ~ 1470N
(100 ~ 150kgf)
Concrete
Suspension bolt (M10)
Angle
About 75
Hanger bolt
Ceiling
Suspension
bolt (M10)
C type
metal
H beam
!
CAUTION
Bend slippreventive metal
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
Long nut
Suspension
bolt (M10)
Suspension
bolt (M10)
part of the wall so as to
Indoor Outdoor
Seal with putty
Seal with
2 ~ 5mm
putty
prevent the possibility of
damaged by mouse.
!
WARNING
Be sure to use protection pipe
(commercial product).
If connecting cables are touching
metal lath inside the wall or inside
the wall is hollow where mouse
Protection
pipe
Sleeve of
protection
pipe
WALL
can bite cables, it can cause
electrical shock or fire.
If sealing is not complete, high
humid air from inside the wall or
outside of the room can come in
and cause water dripping.
Use PVC pipe VP20 (O.D. 26mm) for drain pipe.
Be sure to roll an insulation (thickness 10mm or more) for the drain pipe at indoor side.
Always draw the drain pipe downward so that water flows smoothly. Fix it (ex. by hanger)
to prevent a peak and trap.
Downward 1/25 ~ 1/100
Insulation (Thickness
10mm or more)
>
Seal
Ditch
<
I304: B
Tr ap
No insulation
Stagnant
water
>
●
In case drain piping cannot be done smoothly due to obstacles, it can also be arranged
outside of the main unit as shown in the drawing below.
Use PVC pipe VP20
3
Installation of indoor unit
●
Set nut and washer on suspension bolt and hook it to suspension clamp by lifting the indoor
150mm or less
115mm or less
Downward pitch 1/25 ~ 1/100
VP20
VP20
Insulation (Thickness 10mm or more)
unit.
●
Suspension bolt must have play of 20-30 mm on its right and left. If cannot have enough
play, fix lifting lug to suspension bolt without attaching nut underneath the suspension bolt,
then attach nut and install indoor unit.
●
Make sure that indoor unit is kept level using a level.
Suspension bolt (M10)
(Local purchase)
Hexagon nut (M10)
(Local purchase)
Washer (Local
purchase)
Drawing of
bottom view of
Pattern paper for positioning plate
11
ceiling
The space between bottom surfaces of ceiling and indoor unit
●
Be sure to install the indoor units as follow position (1).
●
Do not install the indoor units as follows position (2) (3).
Indoor unit
0~2
(1) Same level (draw in 0~2mm) (2) Stick out above 0mm (3) Draw in above 3mm
●
Be sure that bottom face
of indoor main unit is the
same height (or expected
height if the ceiling is new
construction.) as lower
surface of the ceiling.
●
If constructing the ceiling after installation
●
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 the panel and
indoor unit, with consequence dropping of condensed water.
of air conditioner, be sure to attach a
pattern paper for installation that shows
ceiling opening dimension.
CAUTION
Selecting the switch
1
Turn power off.
2
Remove cover of the electrical box.
3
When install the indoor unit 2500mm
or more from the floor, select the
Pattern paper for
installation plate
PATTERN PAPER FOR INSTALLATION
12
610mm (Suspension bolt)
Installation plate
fixing screw
13
“STATIC PRESSURE SELECT SW” on
the switch PWB to HIGH STATIC
PRESSURE.
When install the indoor unit below than
2500mm from the floor, select the
Marking hole for
opening on ceiling
Fixing hole
for panel
580mm (Indoor unit shape)
600mm (Opening on ceiling)
NOTE
Please using this pattern paper, decide the suspension
bolt. Position by putting this reverse side on ceiling surface.
Center of
indoor unit
Drain Pipe
400mm (Suspension bolt)
600mm (Opening on ceiling)
Pipes
“STATIC PRESSURE SELECT SW” on
the switch PWB to NORMAL.
Drawing of bottom view of ceiling
Selecting the Mounting Position
The installation place is very important for the air conditioner because it is very difficult to
move from one place to another after the first installation.
Decide the mounting position together with the customer.
The discharge direction can be selected as shown below.
1000mm or more
600mm or more 600mm or more
Pipe
4 Directions 3 Directions 3 Directions 2 Directions 2 Directions
!
CAUTION
600mm or more
600mm or more
Since 2-way outlet as shown below causes performance problems, do not set it.
Pipe Pipe
Blower cover installation
Install the blower cover only to the air outlet direction which is not in use.
Install the blower cover at the diffuser position shown. Fix the blower cover certainly.
Corner seal installation
Install the corner seal at position shown. Fix the corner seal certainly. Shall be installed
disregard to 2 directions, 3 directions or 4 directions.
2 direction example
Fit the blower cover.
Blower cover 14
Corner seal 16
Corner seal 16
A
A
Corner seal 16
Blower cover
A-A Section view
Selecting the switch
1
Turn power off.
2
Remove cover of the electrical box.
3
When selecting discharge direction of 2 directions or 3 directions, select
the “AIR BLOW NOS SW” on the switch PWB to 2 or 3.
When selecting discharge direction of 4 directions, select the “AIR BLOW
NOS SW” on the switch PWB to NORMAL.
NOTE:
During 2 directions or 3 directions, sound level will increase.
4
Connecting the pipe
Connecting the pipe to the indoor unit
Remove the flare nut and seal cap.
By loosening the flare nut at the pipe end, the refrigerant is discharged in a small amount.
The arrangement has been made for shipment, and the discharge of refrigerant is never a
trouble to the equipment.
When the flare nut is removed, never fail to remove the seal cap. If not removed, the refrigerant
will not be circulated, which result the compressor drive motor will possibly be burnt.
Apply refrigerator oil to the union and the flared portion of the pipe.
Wrap flare insulation, bind top and bottom flare insulation by binder.
!
CAUTION
When connecting pipes, if flare nut is over-tightened at the small diameter side, the screw
thread of the service valve may be broken making pipe connection impossible. Be sure to
tighten the nut with specified torque.
Wrapping
Flare nut
Torque
wrench
Insulation pipe for
flare section
1
Refrigerating pipes with insulation
(purchased in the field)
2
encroach (2 ~ 4mm)
Binder
!
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.
Indoor unit
To be adhesion
PVC adhesive
Insulation pipe
for drain pipe 6
Insulation pipe
(10mm or more of
foamed polyethylene)
(purchased in the field)
PVC pipe
(purchased in the field)
Union
Wrench
To be
adhesion
Indoor unit
Insulation at indoor unit
Connecting of drain pipe
●
Securely glue connection part of drain
hose and PVC pipe, using PVC
adhesive.
●
If gluing of drain hose and PVC pipe
is too weak, water leakage may occur.
Be sure to wrap generally-available
insulator (10mm or more of foamed
polyethylene) around drain hose,
Evaporator
inside the house, for insulation heat.
●
Checking drain and water leakage.
Perform after connecting power.
●
If checking of drainage is omitted,
water drop may occur.
●
Add water to water pan of indoor unit
as shown below.
●
Perform test running of drain pump to
Air outlet
Water pan
Pitcher
(add water)
check drainage operation.
●
Test run method
1
Turn power on.
2
Remove cover of electric box and
set the drain pump test run switch
to TEST DRIVE.
3
After checking the drainage, return
the switch to NORMAL.
CAUTION
●
If drain pump test run is right set
to TEST DRIVE, drain pump may
malfunction.
HIGH PRESSURE
STATIC PRESSURE
NORMAL NORMAL
3WAY
LOWTEST
AIR FLOW SELECTION
DRAIN PUMP TEST
INSTALLATION
HIGH
NORMAL
NORMAL
DRAIN PUMP
TEST DRIVE SW
3WAY
AIR FLOW SELECTION
!
1
Lo
Hi
Meter showing pressure
Manifold valve
Knob HI
Vacuum pump
Charge
hose
When pumping starts, slightly loosen
the flare nut to check of air sucked in.
Then tighten the flare nut.
When the meter reaches —101KPa (—76cmHg
during pumping, fully tighten the shuttle.
R410A
The body of
service valve
Cap of
valve core
Hexagonal
Wrench Key
Cap of valve head
Cap of valve head
C
BROWN : C
RED : D
Connect the earth cord
Insert and fix the
connecting cords
with screw
After remove the band,
put the connecting
cords and fix with screw
Preparation of Pipe
●
Use a pipe cutter to cut the copper pipe.
Copper pipe
Trimming tool
2
Pipe Connection
●
Please be careful when bending the copper pipe.
●
Applied frozen grease to the connection points and then screw in
manually. After that, use a torque wrench to tighten the connection.
Flare nut
3
Removal Of Air From The Pipe And Gas Leakage Inspection
Procedures of using Vacuum Pump for Air Removal
As shown in figure on the right, remove the cap of valve head
1
and valve core and then connect them to the vacuum pump
and manifold valve.
!
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 insert the flare nut into the pipe.
Die
Outer
Diameter (mm)
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
For R410A tool
0 ~ 0.5
0 ~ 0.5
0 ~ 0.5
Die
A (mm)
A
Copper pipe
For R22 tool
1.0
1.0
1.0
Small dia. side
Large dia. side
Valve
head cap
Valve core cap
Small dia. side
Large dia. side
Wrench
Outer
dia.of pipe
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
Torque
wrench
Torque N·m
(kgf · cm)
13.7 – 18.6 (140 – 190)
34.3 – 44.1 (350 – 450)
44.1 – 53.9 (450 – 550)
19.6 – 24.5 (200 ~ 250)
19.6 – 24.5 (200 ~ 250)
29.4 – 34.3 (300 – 350)
12.3 – 15.7 (125 ~ 160)
Fully tighten the “Hi” shuttle of the manifold valve and completely
unscrew the “Lo” shuttle. Run the vacuum pump for about 10–
2
15 minutes, then completely tighten the “Lo” shuttle and switch
off the vacuum pump.
AIR REMOVAL
Completely unscrew the spindle of the service valve (at 2 places)
3
in anti-clockwise direction to allow the flow of coolant (using
Hexagonal Wrench key).
Remove the Charge hose and tighten the cap of valve head.
4
The task is then completed.
Gas Leakage Inspection
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)
INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL
●
WARNING
!
Power supply shall be connected at the rated voltage, otherwise the unit will be broken or could not
reach the specified capacity.
THIS APPLIANCE MUST BE EARTHED.
Procedures of Wiring
50 mm
GRN + YEL
Indoor
Unit
10mm
C, D
45 mm
Strip Wires
!
CAUTION
Wiring Of The Indoor Unit
(1) Remove the cover of the electric box.
(2) Connect the connecting cords.
(3) Assemble the cover of electric box.
In case of removing Flare nut of a indoor unit, first remove a nut of small diameter side, or a seal
cap of big diameter side will fly out.
!
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.
●
Please refer to the installation manual for wire connection to the terminals of the units. The
cabling must meet the standards of electrical installation.
●
CONNECTION OF POWER CORD
There is a AC voltage of 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.
1
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 enchance the heat insulation and to prevent water
condensation, please cover the outdoor part of the drain hose
and pipe with insulation pipe.
●
If room humidity is high, cover the connecting pipe with
additional 5mm thickness insulator. This insulator shall be
purchased from field.
●
Completely seal any gap with putty.
Insulation material for pipe connection
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
gauge list below for the wiring from a switch board of fuse box to the outdoor unit in consideration of the locked rotor current.
IMPORTANT
Cable length
2
Installation Of Remote Control
●
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.
up to 16m
up to 15m
up to 25m
Wire cross-section
1.5mm
2.5mm
4.0mm
3
Power Source And Operation Test
2
2
2
Power Source
CAUTION
●
Please make sure, that the power voltage is 220V-230V
within the operation voltage of the unit.
●
Please take under consideration, that the power capacity
from your house distribution box is high enough for operating
your room air conditioner.
Operation Test
IMPORTANT
Fuse Capacity
16A time delay fuse
4
Installation Of Optional Panel
●
Carefully read through the procedures of proper installation
before starting installation work.
Sleeve of
protection pipe
FINAL STAGE OF INSTALLATION
Putty
The controller must be hooked onto the hook at the lower
part of the holder. Push in the remote controller in the direction
as shown in figure below.
Screw (2 pieces)
Holder for
Remote Controller
Remote
Controller
●
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.
<
I000: A
>
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