Hitachi RAI-25NH5A, RAI-35NH5A, RAI-50NH5A Installation Manual
HITACHI CEILING CASSETTE-UNIT AIR
CONDITIONER INSTALLATION MANUAL
Indoor Unit
●
+ – Screwdriver ● Measuring Tape ● Knife
●
Saw
●
ø 65mm Power Drill ● Hexagonal Wrench Key ( 4mm)
●
Wrench (14, 17, 19, 22, 26, 27mm)
●
Gas Leakage Detector
●
Pipe Cutter
●
Vinyl Tape ● Pliers ● Flare Tool
●
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
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
!
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 3.5mm 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-ECPM, please follow exactly the instruction in the manual.
●
Please ensure smooth flow of water when installing the drain hose.
●
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.
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
systems.
●
The installation height of indoor unit must be 2.3m or more.
INDOOR UNIT
Names of Indoor Components
Insulation pipe for flare section
QtyNo. Item
Figure showing the Installation of Indoor Unit.
2
Opening on ceiling and suspension bolt
1
(Unit : mm)
●
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.
Wall Penetration and Installation of Protection Pipe
●
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 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.
●
Set nut and washer on suspension bolt and hook it to suspension clamp by lifting the indoor
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.
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).
(1) Same level (draw in 0~2mm) (2) Stick out above 0mm (3) Draw in above 3mm
!
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
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.
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.
!
CAUTION
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,
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
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.
3 After checking the drainage, return
the switch to NORMAL.
Connecting the pipe
4
INDOOR UNIT
FOR SERVICE PERSONNEL ONLY
Pattern paper for positioning
plate
Screw for holder of Remote
Controller
(3.1x16)
AAA Size Battery
Binder
Insulation pipe for drain pipe
Insulation pipe
Remote Controller
Pattern paper for installation
plate
Installation plate fixing screw
(M5 X 16)
4
1
2
2
1
1
1
1
1
4
Blower cover
2
Preparation for installing indoor unit
2
Installation of suspension bolts
●
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
●
In case of steel frame (Unit : mm)
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
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.
!
WARNING
Drain pipe installation
●
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.
Installation of indoor unit
3
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.
!
CAUTION
Since 2-way outlet as shown below causes performance problems, do not set it.
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.
!
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.
●
If drain pump test run is right set
to TEST, drain pump may
malfunction.
!
CAUTION
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
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.
Be sure to
completely
seal any
gap with
putty.
650 (Panel)
600 (Opening on ceiling)
580 (Indoor unit)
400 (Suspension bolt)
64
42
393 (Elec-box)
580 (Indoor unit)
600 (Opening on ceiling)
610 (Suspension bolt)
650 (Panel)
285
110
Above 300
32
Ceiling
Panel (Optional part RAI-ECPM)
Narrow pipe Ø6.35
97 (Drain)
Drain outlet
42
65
Wide pipe Ø12.7
Air outlet
55
230 (Drain)
227 (Electric box)
Air inlet Air outlet
112 62
60 ~ 90mm square piece of lumber
150 ~ 160mm
Insert 980 ~ 1470N
(100 ~ 150kgf)
Bend slippreventive metal
C type
metal
Concrete
Suspension bolt (M10)
Hanger bolt
Reinforcing
bar
Long nut
Suspension
bolt (M10)
Suspension
bolt (M10)
Angle
Nut
Suspension
bolt (M10)
Suspension
bolt (M10)
Ceiling
Ceiling
H beam
Nut
Angle
110
110
About 75
Angle
About 75
Indoor Outdoor
Seal with putty
Seal with
putty
2 ~ 5mm
Sleeve of
protection
pipe
WALL
Protection
pipe
Downward 1/25 ~ 1/100
Seal
Insulation (Thickness
10mm or more)
Ditch
Tra p
No insulation
Stagnant
water
Insulation (Thickness 10mm or more)
Downward pitch 1/25 ~ 1/100
150mm or less
Use PVC pipe VP20
115mm or less
VP20
VP20
Suspension bolt (M10)
(Local purchase)
Hexagon nut (M10)
(Local purchase)
Washer (Local
purchase)
Pattern paper for positioning plate
11
Drawing of
bottom view of
ceiling
Indoor unit
0~2
A
A
2 direction example
Fit the blower cover.
Blower cover
A-A Section view
Corner seal 16
Corner seal 16
Blower cover 14
Corner seal 16
Union
Wrench
Flare nut
Torque
wrench
To be
adhesion
Wrapping
Insulation pipe for
flare section
1
Refrigerating pipes with insulation
(purchased in the field)
Binder
2
encroach (2 ~ 4mm)
Insulation at indoor unit
Indoor unit
Indoor unit
To be adhesion
PVC adhesive
Insulation pipe
(10mm or more of
foamed polyethylene)
(purchased in the field)
PVC pipe
(purchased in the field)
Insulation pipe
for drain pipe 6
Evaporator
Air outlet
Water pan
Pitcher
(add water)
Drawing of bottom view of ceiling
610mm (Suspension bolt)
Pipes
Drain Pipe
580mm (Indoor unit shape)
400mm (Suspension bolt)
Fixing hole
for panel
Center of
indoor unit
PATTERN PAPER FOR INSTALLATION
Marking hole for
opening on ceiling
12
Pattern paper for
installation plate
13
Installation plate
fixing screw
600mm (Opening on ceiling)
600mm (Opening on ceiling)
NOTE
Please using this pattern paper, decide the suspension
bolt. Position by putting this reverse side on ceiling surface.
●
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.
!
CAUTION
Pipe Pipe
600mm or more 600mm or more
600mm or more
600mm or more
1000mm or more
Pipe
4 Directions 3 Directions 3 Directions 2 Directions 2 Directions
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 FLOW SELECTION” on the main PWB to 3 way.
When selecting discharge direction of 4 directions, select the “AIR FLOW
SELECTION” on the switch PWB to NORMAL.
NOTE:
During 2 directions or 3 directions, sound level will increase.
3
Corner Seal
●
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.
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
“STATIC PRESSURE SW” on the main
PWB to HIGH PRESSURE.
When install the indoor unit below than
2500mm from the floor, select the
“STATIC PRESSURE SW” on the main
PWB to NORMAL.
●
If constructing the ceiling after installation
of air conditioner, be sure to attach a
pattern paper for installation that shows
ceiling opening dimension.
<
IA370: A
>
Holder for Remote Controller
RAI-25NH5A
RAI-35NH5A
RAI-50NH5A
HFC
R410A
!
CAUTION
•
The installation height of indoor unit
must be 2.3m or more.
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
NORMAL
AIR FLOW SELECTION
3WAY
AIR FLOW
SELECTION
DRAIN PUMP TEST SW
NORMAL
TEST
DRAIN PUMP
TEST SW
1
2
3
4
5
6
7
8
11
12
13
14
16
QtyNo. Item
1
Insulator
17
RAI-50NH5A
Removal Of Air From The Pipe And Gas Leakage Inspection
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)
FINAL STAGE OF INSTALLATION
Insulation And Maintenance Of Pipe Connection
1
●
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.
Installation Of Remote Control
2
Power Source And Operation Test
3
●
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.
Power Source
CAUTION
!
●
Please make sure, that the power voltage is 220V-240V
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
●
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.
Insulation material for pipe connection
Sleeve of
protection pipe
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.
3
Procedures of using Vacuum Pump for Air Removal
As shown in figure on the right, remove the cap of valve head
and valve core and then connect them to the vacuum pump
and manifold valve.
Fully tighten the “Hi” shuttle of the manifold valve and completely
unscrew the “Lo” shuttle. Run the vacuum pump for about
10–15 minutes, then completely tighten the “Lo” shuttle and
switch off the vacuum pump.
2
Completely unscrew the spindle of the service valve (at 2 places)
in anti-clockwise direction to allow the flow of coolant (using
Hexagonal Wrench key).
3
Remove the Charge hose and tighten the cap of valve head.
The task is then completed.
4
1
Preparation of Pipe
1
●
Use a pipe cutter to cut the copper pipe.
●
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.
Pipe Connection
2
INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL
CAUTION
!
Copper pipe
Trimming tool
Outer
Diameter (mm)
6.35 (1/4")
9.52 (3/8")
For R410A tool
0 ~ 0.5
0 ~ 0.5
For R22 tool
1.0
1.0
A (mm)
AIR REMOVAL
●
THIS APPLIANCE MUST BE EARTHED.
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.
Procedures of Wiring
CONNECTION OF POWER CORD
A
Die
Die
Copper pipe
Wrench
Torque
wrench
Flare nut
The body of
service valve
Cap of
valve core
Hexagonal
Wrench Key
Cap of valve head
Cap of valve head
CAUTION
!
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.
●
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.
WARNING
!
Power supply shall be connected at the rated voltage, otherwise the unit will be
broken or could not reach the specified capacity.
Installation Of Optional Panel
4
●
Carefully read through the procedures of proper installation
before starting installation work.
<
IA370: A
>
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
Fuse Capacity
16A time delay fuse
IMPORTANT
Cable length
up to 16m
up to 15m
up to 25m
Wire cross-section
1.5mm
2
2.5mm
2
4.0mm
2
Remote
Controller
Holder for
Remote Controller
Screw (2 pieces)
Outer
dia.of pipe
6.35 (1/4")
9.52 (3/8")
6.35 (1/4")
9.52 (3/8")
Torque N·m
(kgf · cm)
13.7 – 18.6 (140 – 190)
34.3 – 44.1 (350 – 450)
19.6 – 24.5 (200 ~ 250)
19.6 – 24.5 (200 ~ 250)
12.3 – 15.7 (125 ~ 160)
Small dia. side
Large dia. side
Valve core cap
Small dia. side
Large dia. side
Valve
head cap
Indoor
Unit
C, D
GRN + YEL
Strip Wires
50 mm
45 mm
10mm
●
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 3x1.5mm
2
.
●
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.
WARNING
!
When the meter reaches - 101KPa
(-76cmHg) during pumping, fully
tighten the shuttle.
Meter showing pressure
R410A
Manifold valve
Vacuum
pump
Valve
Charge hose
Valve
Vacuum pump
adapter
When pumping starts, slightly loosen the
flare nut to check of air sucked in. Then
tighten the flare nut.
Lo Hi
[For all optional part, please refer catalog for part number]
As for connecting to H-Link, a separately purchased RAC Adapter is
required.
●
To install the wiring the electrical box cover must be opened.
●
Connect the connector of RAC adapter to CN1101.
●
Assemble back the cover of electrical box.
●
Please refer to the respective user manual of RAC Adapter for further details.
●
Please be careful not to damage lead wires by edge of plate when connecting the
optional parts.
[For all optional part, please refer catalog for part number]
Connection to the electrical box:
●
Remove the cover of electrical box.
●
Connect the connector of Weekly Timer/wired remote controller to CN1102.
●
Assemble back the cover of electrical box.
●
Please refer to the respective user manual of Weekly Timer/wired remote controller
for further details.
●
Please be careful not to damage lead wires by edge of plate when connecting the
optional parts.
WEEKLY TIMER / WIRED REMOTE CONTROLLER
H-LINK
How To Connect The Optional Parts
(RAC Adapter, Weekly Timer, Wired Remote Control)
CN1101
CN1102
RAC Adaptor cord
Wired remote controller cord
Weekly timer/
Wired remote
controller
RAC Adapter
C
D
Connect the earth cord
Insert and
fix the
connecting
cords with
screw
After remove the screw,
put the connecting
cords in the band
and fix with screw
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