Hitachi RAC-EH18WHLAE Installation Manual

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FOR SERVICE PERSONNEL ONLY
HITACHI
HITACHI SPLIT-UNIT AIR CONDITIONER
INSTALLATION MANUAL
Outdoor Unit
RAC-EH18WHLAE
RAC-EH24WHLAE
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.
&,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 R41 OA. 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 concerning 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 3/25"(3mm) has to be installed in the power supply line to the outdoor un
• Do not install the unit near a location where there is flammable gas. The outdoor unit may catch fire if
_
flammable gas leaks around ,t.
• 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 3-7/2511(1 m) between the supports.
Please face this side (suction
• Please mount the outdoor
side) of the unit to the wall.
unit on stable ground
to prevent vibration and
increase of noise level.
• Decide the location for
� �
piping after sorting out
the different types of pipe
available.
• Open the side plate by
unscrewing the screws as
shown beside.
Pull downward
� CAUTION
Top cover
Please make sure to remove all
spacers inside the unit.
• Open the Top, Back and Side
cover of the unit.
• Pull out the spacers inside.
(Spacers are only for
transportation purpose).
If not remove, vibration and
noise will occur.
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT
• There are holes on the base of Outdoor unit for condensed water to
exhaust.
• In order to flow condensed water to the drain, the unit is installed on a
stand or a block so that the unit is 3-47/50"(100mm) above the ground
as shown figure. Join the drain pipe to one hole.
• At first insert one portion of the hook to the base (Portion A), then pull
the drain pipe in the direction shown by the arrow while inserting the
hook into the base. After installation, check whether the drain pipe cling
to the base firmly.
BASE
�
+-
DRAIN PIPE
When Using and Installing In Cold Areas
When the air conditioner is used in low temperature and in snowy conditions,
water from the heat exchanger may freeze on the base surface to cause
poor drainage. When using the air conditioner in such areas, do not install
the bushings. Keep a minimum of 9-17/20"{250mm) between the drain
*
hole and the ground. When using the drain pipe, consult your sales agent.
For more details, refer to the installation Manual for Cold Areas.
• 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 T ape • Knife
• Saw • Pipe Cutter• Hexagonal Wrench Key ( IO 4/25"(4mm)
• Power Drill (02-14/25"(65mm) - 0 3-3/20"(80mm))
• Vacuum Pump • Pliers or Wrench • Torque Wrench
• Vacuum Pump Adaptor • Flare Tool • Gas Leakage Detector
• Manifold Valve • Charge Hose • Reammer • File
it.
�
\
II
Preparation of Pipe
Please
remove
side cover
when
connecting
the piping
�
and
connecting
corc:I.
• 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.
Outer diameter Thickness
Flare tool for R41 OA
in(mm)
in(mm)
1 /4"(6.35mm) 0.03(0.8)
3/8"(9.52mm) 0.03(0.8)
1/2"(12.70mm) 0.03(0.8)
5/8"(15.88mm) 0.04(1.0)
Pipe Connection
Lt
• When removing flare nut from the Indoor unit, please ensure
to use proper tooling.
• Prevent pipe from coming in contact with water or working in
CAUTION
wet area.
Wrench/.�
--------
Outer dia.of pipe
Small dia. side 1/4"(6.35mm)
3/8"(9.52mm)
Large dia. side 1/2"(12.7mm)
5/8"(15.88mm)
Small dia. side 1/4"(6.35mm)
3/8"(9.52mm)
Valve
head cap Large dia. side
1/2"(12.7mm)
5/8"(15.88mm)
Valve core cap
THE CHOICE OF MOUNTING SITE (Please note the following matters and obtain permission from customer before installation).
• The outdoor unit must be mounted at a location which can support heavy weight. Otherwise, noise and vibration will increase.
• Selecting the installation location: Suitable location that will reduce the impact from rain and direct sun that may affect the unit
performance. Besides that, ventillation 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 three 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 connection wire at least 3-7/25ft(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.
Names of Outdoor Components
Dimension of Mounting Stand
No. Item
Qty
Bush (unit : in(mm))
� 3
(j)
mounting stand
[
Drain Pipe
1
®
�
Bush
1
®
�
�CAUTION
• 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.
• Mechanical connectors used indoor
• Installation of pipe length less
shall comply with ISO 14903.
When mechanical connectors are
reused indoors, sealing parts shall
be renewed. When flare joints are
reused indoors, the flare part shall
be re-frabricated.
• Refrigerant tubing shall be protected
or enclosed to avoid damage.
__ _
r,
ming tool
fa �
Copper pipe \
�
it
CAUTION
• Recommend to use
R41 DA flaring tool.
A in(mm)
Conventional flare tool
Clutch type
Clutch type Wing nut type
0.0-0.02(0.0-0.5) 0.04--0.06(1.0-1.5) 0.0&--0.08(1.5-2.0)
0.0-0.02(0.0-0.5) 0.04--0.06(1.0-1.5) 0.0&--0.08(1.5-2.0)
0.0-0.02(0.0-0.5) 0.04--0.06(1.0-1.5) 0.0&--0.10(1.5-2.5)
0.0-0.02(0.0-0.5) 0.04--0.06(1.0-1.5) 0.0&--0.10(1.5-2.5)
��
I
{l.;t__
Torque
-...
� ./� wrench
Torque N.m (kgf.cm)(lbf.ft)
in(mm)
13.70 ~ 18.60 (140 ~ 190) (10.08 ~ 13.68)
34.30 - 44.10 (350 ~ 450) (25.20 ~ 32.40)
44.10 - 53.90 (450 - 550) (32.40 - 39.60)
49.00 ~ 58.80 (500 ~ 600) (36.00 ~ 43.20)
19.60 - 24.50 (200 ~ 250) (14.40 ~ 18.00)
19.60 - 24.50 (200 ~ 250) (14.40 ~ 18.00)
29.40 - 34.30 (300 - 350) (21.60 - 25.20)
29.00 - 31.00 (296 ~ 316) (21.31 - 22.75)
12.30 - 15.70 (125 - 160) (8.75 - 11.52)
� WARNING
� CAUTION
Figure showing the Installation of Outdoor Unit.
of the outdoor unit
I
? &,CAUTION
- u
In case the pipe length is more than the recommended length for chargeless,
I
2-8/32"(57mm)
[) add refrigerant R41 OA as below. Do not exceed the maximum pipe length.
· �
��
Max. Pipe
Model
i• �
ft(m)
/
"
'
15132"(�
RAC-EH18WHLAE 82(25)
1-12/32''(35mm
+ i
20"(50Bmml
RAC-EH24WHLAE 82(25)
7-25132" 198mm1/
• The difference in height between the indoor
&,. WARNING
and outdoor unit should be k e p t ma x .
49-21l100ft(15m).
• Flare connection only at
• The connecting pipe, no matter big or small,
outside of building
should all be insulated with insulation pipe and
then wrapped with plastic tape. (The insulator
will deteriorate if it is not wrapped with tape).
6
CAUTION
than minimum pipe length
Refrigerant piping
requirement 9-21/25lt(3m) may
must be protected
generate an abnormal sound.
from physical
damage. Install a
plastic cover or
equivalent.
*
give clearance as
wide as possible
Removal Of Air From The Pipe And Gas Leakage Inspection
Procedures of using Vacuum Pump for Air Removal
When the meter reaches (-16.65psi (-10MPa))
during pumping, fully tighten the Manifold
gauge valve.
As shown in right figure, remove the cap
of valve core. Then, connect the charge
hose. Remove the cap of valve head.
Connect the vacuum pump adapter to the
vacuum pump and connect the charge
hose to the adapter.
Fully tighten the "Hi" knob of the manifold
valve and completely unscrew the "Lo"
knob. Run the vacuum pump for about
10~15 minutes, then completely tighten
the "Lo" knob and switch off the vacuum
pump.
After vacuuming, confirm that the needle
of the manifold gauge is stable for 3~5
minutes.
Remove the charge hose and tighten
the cap of valve core. Check the cap's
periphery if there is any gas leakage.
Completely unscrew the spindle of
the service valve (at 2 places) in anti­
clockwise direction to allow the flow of
Cap of valve head
refrigerant (using Hexagonal Wrench
key).
Re-cap the service valve and tighten
using wrench. Check the cap's periphery
if there is any gas leakage. The task is
then completed.
Lt.CAUTION
• Prevent moisture from entering pipe connection.
• Refrigerating machine oil not be applied to the outside
of the flare.
When refrigerating oil is applied to the outside of the
flare, cracking of the flare nut, destruction of the flare
and gas leakage may occur due to the excessive
tightening of the flare nut.
• When using the control valve, do not use deteriorated
packing. And, do not overtighten the steering wheel.
Gas leakage from the service valve part, stagnation,
touching fire, rarely cause ignition.
LIT 12013816
Chargeless up to Additional R410A
oz/lt(g/m)
ft(m)
24-61/100(7 .5) 0.10(10)
24-61/100(7 .5) 0.06(6)
&,CAUTION
• 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 oonnection of insulated
drain hose.
inner diameter 063/1 00"
�m)
Please use insulated drain
hose for the indoor piping
(commercial product).
Meter showing pressure
Closed
When pumping starts, slightly loosen the
flare nut to check of air sucked in. Then
tighten the flare nut.
he body of
service valve
0
e
7'
�� He::;::� �
�Wrench Key
, ()
Cap of valve head
( 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 R41 OA)