Hitachi RAI-25QPB Installation Manual

FOR SERVICE PERSONNEL ONLY
HITACHI CEILING CASSETTE-UNIT AIR
CONDITIONER INSTALLATION MANUAL
RAI-25QPB
Indoor Unit
RAI-35QPB
RAI-50QPB

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.
!
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.
●
● 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.
● 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 specifi ed 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 fi re.
Please use the specifi ed components for installation work. Otherwise, the units may collapse or water leakage, electric shock and fi re may occur.
●
● Be sure to use the specifi ed piping set for R-410A. Otherwise, this may result in broken copper pipes or faults.
When installing or removing an air conditioner, only specifi ed 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 fi re, 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 fi re in the fan-driven heater, space heater, etc., a poisonous gas may occur.
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.
!
● A circuit breaker or fuse 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 fl ammable gas. The outdoor unit may
catch fi re if fl ammable gas leaks around it.
● For installation of front panel RAI-ECPP, please follow exactly the instruction in the manual.
● Please ensure smooth fl ow of water when installing the drain hose.
1 Opening on ceiling and suspension bolt
● Need a connecting work for refrigerant pipe, drain pipe and connecting cable in the ceiling
after suspending the indoor unit. Arrange drain pipe, refrigerant pipe and connecting cable
in their installation position.
● For fi nishing 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 fi tting indoor unit.
2 Preparation for installing indoor unit
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 fi eld.
● Refer to diagrams shown below for length of suspension bolts.
● In case of wooden frame ● In case of steel frame
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.
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 fl ows smoothly. Fix it (ex. by hanger)
●
to prevent a peak and trap.
< >
IA1171: A
INS RAI-25-35-50QPB-EN1 1 INS RAI-25-35-50QPB-EN1 1
● 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
+ – Screwdriver
● ● Measuring Tape ● Knife
● ø 65mm Power Drill ● Hexagonal Wrench Key (
● Wrench (14, 17, 19, 22, 26, 27mm) ● Gas Leakage Detector
Pipe Cutter Vinyl Tape Pliers Flare Tool
● ● ● ●
WARNING
CAUTION
● 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.
(Unit : mm)
3 Installation of indoor unit
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, fi x 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).
●
(Unit : mm)
(1) Same level (draw in 0~2mm)
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
●
of air conditioner, be sure to attach a
pattern paper for installation that shows
ceiling opening dimension.
CAUTION
!
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.
WARNING
!
Be sure to use protection pipe
(commercial product).
If connecting cables are touching
Drawing of bottom view of ceiling
metal lath inside the wall or inside
the wall is hollow where mouse
Selecting the Mounting Position
can bite cables, it can cause
The installation place is very important for the air conditioner because it is very diffi cult to
electrical shock or fi re.
If sealing is not complete, high move from one place to another after the fi rst installation.
humid air from inside the wall or Decide the mounting position together with the customer.
outside of the room can come in The discharge direction can be selected as shown below.
and cause water dripping.
Since 2-way outlet as shown below causes performance problems, do not set it.
THE CHOICE OF MOUNTING SITE
The unit should be mounted at stable, non-vibratory location which can provide full support to the unit.
●
● No nearby heat source and no obstruction near the air outlet is allowed.
The clearance distances from top, right and left are specifi ed in fi gure 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 fl uorescent 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
● Saw
systems.
4mm)
● The installation height of indoor unit must be 2.3m ~ 3m. Installation above 3m will affect the performance of unit.
Names of Indoor Components
No. Item Qty
Insulation pipe for fl are section
2
1
Binder
4
2
Holder for Remote Controller
1
3
AAA Size Battery
2
4
Screw for holder of Remote
5 Controller
2
Insulation pipe for drain pipe
6 1
Insulation pipe
7 1
Remote Controller
1
8
Pattern paper for positioning
plate
1
11
Pattern paper for installation
plate
1
12
Installation plate fi xing screw
4
13
(M5 X 16)
Blower cover
2
14
Corner Seal
3
16
(2) Stick out above 0mm (3) Draw in above 3mm
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 the panel and
indoor unit, with consequence dropping of condensed water.
Selecting the switch
Turn OFF power supply.
1
Remove cover of the electrical box.
2
When install the indoor unit 2500mm or
3
more from the fl oor, select the "STATIC
PRESSURE" switch on the main PWB
to HIGH pressure.
When install the indoor unit below
than 2500mm from the fl oor, select
the "STATIC PRESSURE" switch on
the main PWB to NORMAL.
CAUTION
!
(Please note the following matters and obtain permission from customer before installation).
WARNING
!
CAUTION
!
Figure showing the Installation of Indoor Unit.
•
Be sure to
completely
seal any
gap with
putty.
RAI-50RPA
No. Item Qty
Insulator
1
17
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.
Selecting the switch
Turn OFF power supply.
1
Remove cover of the electrical box.
2
When selecting discharge direction of 2 directions or 3 directions, select
3
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.
4 Connecting the pipe
Connecting the pipe to the indoor unit
Remove the fl are nut and seal cap.
By loosening the fl are 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 fl are 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 fl ared portion of the pipe.
Wrap fl are insulation, bind top and bottom fl are insulation by binder.
CAUTION
!
When connecting pipes, if fl are 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 specifi ed torque.
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.
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 OFF power supply.
Remove cover of electric box and
2
set the drain pump test run switch
to TEST.
After checking the drainage, return
3
the switch to NORMAL.
CAUTION
!
If drain pump test run is right
●
set to TEST, drain pump may
malfunction.
CAUTION
!
The installation height of indoor
unit must be 2.3m ~ 3m.
The indoor piping
should be insulated
with the enclosed
insulation pipe. (If the
insulator is insuffi cient,
please use commercial
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.
CAUTION
!
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