FOR SERVICE PERSONNEL ONLY
HITACHI
SPLIT UNIT AIR CONDITIONER
INSTALLATION MANUAL
Outdoor Unit
RAC-E50YHA � RAC-E60YHA
• 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
( (II) mark is tool exclusive use for R32)
• 0 0
Screwdriver • Measuring Tape • Knife
• Saw • Pipe Cutter • Hexagonal Wrench Key ( IO 4mm)
• Power Drill (0 65mm - 0 80mm) • Vacuum Pump
•
Pliers or Wrench • Torque Wrench
• Vacuum
Pump Adaptor • Flare Tool • Gas Leakage Detector
•
Manifold Valve • Charge Hose • Reamer • File
Refrigerant pipe size (outer diameter): Narrow pipe, Liquid (06.35mm); Wide pipe, Gas (012.70mm)
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.
Lt,
WARNING ........ Incorrect methods of installation may cause death or serious injury.
Lt,
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.
,6WARNING
• Flare nut must use a torque wrench without fail. lighten 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.
• A brazed, welded, or mechanical connection shall be made before opening the valves to permit refrigerant to flow
between the refrigerating system parts. A vacuum valve shall be provided to evacuate the interconnecting pipe and/
or any uncharged refrigerating system part.
• Mechanical connectors used indoors shall comply with ISO 14903. When mechanical connectors are reused indoors,
sealing parts shall be renewed. When flared joints are reused indoors, the flare part shall be re-fabricated.
• Refrigerant tubing shall be protected or enclosed to avoid damage.
• 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 R32. Otherwise, this may result in broken copper pipes or faults.
• When installing or removing an air conditioner, only specified refrigerant (R32) 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.
,6 CAUTION
• A circuit breaker or fuse must be installed. Without a circuit breaker or fuse the danger of electric shock exists.
The external switch shall be incorporated to completely disconnect from power supply. It should disconnect all
poles, and a contact separation of at least 3mm must be present.
• 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.
\�
• 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 1 m between the supports.
,6 WARNING
• Do not use means to accelerate the defrosting process or to clean, other than those recommended by the
manufacturer. Any unfit method or using incompatible material may cause product damage, burst and serious
injury.
• The appliance/pipe-work shall be stored in a well ventilated room with indoor floor area larger than A
m
;, [refer
to Table 1] and without any continuously operating ignition source. Keep away from open flames, any operating
gas appliances or any operating electric heater. Else, it may explode and cause injury or death.
• The appliance/pipe-work shall be installed, and/or operated in a room with floor area larger than A
m
;, [refer to
Table 1] and keep away from ignition sources, such as heat/spark/open flame or hazardous areas such as gas
appliances, gas cooking, reticulated gas supply systems or electric cooking appliances, etc.
• Do not pierce or burn as the appliance/pipe-work is pressurized. Do not expose the appliance/pipe-work to heat,
flame, sparks, or other sources of ignition. Else, it may explode and cause injury or death.
<IA0000:@>
INS RAC-E50/60YHA (EN).indd 1
The Choice of Mounting Site
(Please note the following matters and obtain permission from customer before installation).
,1',WARNING
Names of Outdoor Components
•
The Outdoor unit must be mounted at a location which can support
No.
Item
Qty
Dimension of Mounting Stand
of the Outdoor unit
heavy weight. Otherwise, noise and vibration will increase.
Lt,
CAUTION
•
Do not expose the unit under direct sunshine or rain. Besides,
ventilation must be good and clear of obstruction.
•
The air blown out of the unit should not point directly to animals
or plants.
•
The clearances of the unit from top, left, right and front are
specified in figure below. At least 3 of the above sides must be
open air.
•
Be sure that the hot air blown out of the unit and noise do not
disturb the neighbourhood.
•
Do not install at a location where there is flammable gas, steam,
oil and smoke.
•
The location must be convenient for water drainage.
•
Place the Outdoor unit and its connecting cord at least 1 m away
from the antenna or signal line of television, radio or telephone.
This is to avoid noise interference.
•
Do not install outdoor unit facing strong wind direction. It may
damage the fan motor.
• Do not install the outdoor unit in a place where small animals
may build their nests. If small animal goes inside the unit and
touches the electrical parts, failure of the unit, smoke or fire may
be caused. Request your customer to keep the surrounding of
the unit is clean.
G)
@
®
Bush
�
Drain Pipe
;s
Bush
g
3
1
1
(unit: mm)
mounting stand
Figure showing the Installation of Outdoor Unit.
&CAUTION
• This unit is chargeless up 30m pipe length.
• Installation of pipe length less than minimum pipe length
requirement (3 meters) may generate an abnormal sound.
&,
WARNING
Table 1: Minimum Floor area of the room A
min
(m')
This symbol shows that this
equipment uses a flammable
refrigerant.
If the refrigerant is leaked,
together with an external
ignition source, there is a
possibility of ignition.
m
CAUTION
This symbol shows that the
Operation Instructions should
be read carefully.
�CAUTION
This symbol shows that a
service personnel should be
handling this equipment with
reference to the Installation
Manual.
[Il]
CAUTION
This symbol shows that there
is information included in
the Operation Manual and/or
Installation Manual
Lt,.
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.
Outdoor
Max Piping
Model
Length
(m)
RAC-E50YHA
30
RAC-E60YHA
30
Be sure to
completely
seal any gap
with putty.
0
C
g Jll
"
13
>
C
�-1
"O
�-gj
()iii
E
Refrigerant piping
must be protected
from physical
damage. Install a
plastic cover or
equivalent.
E
g
"
c.
·a
E
-�
*
above 700mm
Max refrigerant
Minimum Floor area of the room
charge amount
A
m
i
n
(m')
(g)
RAS-E**YHA RAI-E**YHA RAD-E**YHA
1500
1500
2.15
2.15
as wide as
possible
1.44
1.44
1.44
1.44
i'.'.t.WARNING
Flare connection only at outside
of building
The indoor piping should
be insulated with the
enclosed insulation
pipe. (If the insulator is
insufficient, please use
commercial products).
• The difference in height
between the indoor and
outdoor unit should be
kept max 20m.
• 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).
The connection of insulated
drain hose.
inner diameter 0 16mm
�
Please use insulated drain
hose for the indoor piping
(commercial product).
2018-03-21 10 :45 AM I
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