Hitachi RAM-SJ18H2NK User manual

CAUTION
!
The Choice of Mounting Site (Please note the following matters and obtain permission from customer before installation).
Dimension of Mounting Stand
of the Outdoor unit
(unit : mm)
mounting stand
3
Bush
Names of Outdoor Components
QtyNo. Item
Drain Pipe
1
Bush 1
●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 1m between the supports.
●In order to avoid a hazard due to inadvertent resetting of the THERMAL CUT-OUT, this appliance must not be
supplied through an external switching device,such as timer or connected to a circuit that is regularly switched
on and off by the utility.
Figure showing the Installation of Outdoor Unit.
●The Outdoor unit is charged with refrigerant for pipe length
up to 50m.
In case the pipe length is more than recommended length,
add refrigerant R410A as below.
Do not exceed the maximum pipe length.
●Installation of pipe length less than minimum pipe length
requirement 5m may generate an abnormal sound.
CAUTION
●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.
Please use insulated drain
hose for the indoor piping
(commercial product).
The indoor piping should
be insulated with the
enclosed insulation
pipe. (If the insulator is
insufficient, please use
commercial products).
Be sure to
completely
seal any gap
with putty. above 100mm
above 300mm
about 400mm
must not bend
Maximum pipe length 50m Minimum pipe length 5m
above 200mm above 100mm
give
clearance
as wide as
possible
above 700mm
above 200mm
inner diameter ø16mm
!
1
2
3
!
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.
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.
●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.
●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.
WARNING
WARNING
!
!
Refrigerant piping
must be protected
from physical
damage. Install a
plastic cover or
equivalent.
Flare connection only at outside
of building
WARNING
!
WARNING
!
●The Outdoor unit must be mounted at a location which can support
heavy weight. Otherwise, noise and vibration will increase.
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 1m 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.
OUTDOOR UNIT
1. Proper place for installation
1.1 Outdoor unit
(1) Keep the space around the unit for maintenance and avoiding the effects of hindrance for normal ventilation of the
unit.
(2) The northern or eastern side of the building is better to install. At the installation on the southern or western side
unavoidably, some blind should be set up for the unit. (In this case, the blind must not obstruct the ventilation of
the unit.)
(3) You’d better not put the unit at a place where is full of dirt and at a place where is wet in the rain.
(4) Place as near as possible to the indoor unit.
(5) Install the unit in a stable place to minimize vibration or noise.
(6) After arranging the cords and pipes, secure them in place.
●This appliance must be grounded.
●Power is supplied through outdoor unit, do not connect power source to indoor unit.
WARNING
!
2. In the electrical installation a separator with a contact gap of more than 3mm has to be installed. During cleaning or
service the set has to be switched off with this separator.
Height difference
Height difference between indoor units should not be more than 5m
Piping length
CAUTION
●Make sure to connect to two indoor units.
!
(Within ±20m)
5m
(L1 + L2) = Maximum 50m
Minimum piping length for each indoor unit is 5m.
Maximum piping length for one indoor unit is 25m.
One unit of 2.0kW, 2.5kW or 3.5kW
One unit of 2.0kW, 2.5kW or 3.5kW
●To the outdoor unit, up to two indoor units can be connected until the total value of each units’s
capacity reaches 7kW.
●The pipe connection ports of the outdoor unit and connectable indoor units are shown above.
above 100mm
Tools Needed For Installation Work
WARNING
!
●Carefully read through the procedures of
proper installation before starting installation
work.
●The sales agent should inform customers
regarding the correct operation of installation.
●+–Screwdriver ●Measuring Tape
●Knife ●Saw ●Pipe Cutter
●Hexagonal Wrench Key ( 4mm)
●Power Drill (ø65mm ~ ø80mm)
●Vacuum Pump ●Pliers or Wrench
●Torque Wrench ●Vacuum Pump Adaptor
●Flare Tool ●Gas Leakage Detector
●Manifold Valve ●Charge Hose
●Reammer ●File
●
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.
●
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 specified circuit. A short circuit and fire may occur due to the use of low quality
wire or improper work.
●
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 R410A . 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 interrupt
may result in electrical shocks, or fire.
●
If you need to add refrigerant, please contact your local distributor.
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.
Make sure to connect earth wire.
This sign in the figures indicates prohibition.
Be sure that the unit operates in proper condition after installation. Explain to customer the proper operation
and maintenance of the unit as described in the user’s guide. Ask a customer to keep this installation manual
together with the instruction manual.
!
!
< IA2221: A >
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
INSTALLATION
MANUAL
SPLIT UNIT AIR CONDITIONER
OUTDOOR UNIT
RAM-SJ18H2NK
EN INSTRUCTION MANUAL
FOR SERVICE
PERSONNEL ONLY
< IA2221: A >

OUTDOOR UNIT
●Please mount the Outdoor 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.
●When removing side cover, please pull the handle after undoing
the hook by pulling it downward.
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 put
on the flare nut.
Pipe Connection
2
INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL
CAUTION
!
Please face this side (suction side)
of the unit to the wall.
Please remove side cover
when connecting the piping and
connecting cord.
Pull downward
BASE
CAUTION
!
In case of removing flare nut of an Indoor unit, first
remove a nut of small diameter side, or a seal cap of
big diameter side will fly out. Prevent water from entering
into the piping when working.
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 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.
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
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.
DRAIN PIPE
ABOVE 100mm
BUSH BUSH
DRAIN PIPE
Trimming tool
Copper pipe
Die
Die
Copper pipe
Flare nut
Torque
wrench
Wrench
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. (Be
sure to use R410A detector)
3
AIR REMOVAL
When the meter reaches - 101KPa
(-76cmHg) during pumping, fully tighten
the Manifold Valve
Closed R410A
Valve
Charge hose
Vacuum
pump
adapter
When pumping starts, slightly loosen
the flare nut to check of air sucked in.
Then tighten the flare nut.
Vacuum
pump
Manifold valve
Meter showing pressure
Valve
Procedures of using Vacuum Pump for Air Removal
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.
2
Completely unscrew the spindle of the
service valve in anti-clockwise direction to
allow the flow of 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.
Remove the charge hose and tighten the cap
of valve core. Check the cap’s periphery if
there is any gas leakage.
4
5
1
3
Cap of valve head
Cap of valve head
The body of
service valve
Hexagonal
Wrench Key
Cap of valve
core
●Prevent moisture from entering pipe
connection.
●Refrigerating machine oil not be applied
to the outside of the flare.
When refrigerating machine oil is applied
to the outside of the flare, excessive
tightening of the flare nut, cracking of
the flare nut, destruction of the flare
and gas leakage may occur.
●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.
CAUTION
!
CONNECTION OF POWER CORD
Procedures of Wiring Detail of Cutting the Connecting Cord
●The naked part of the wire core should be 10mm 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 wire specified for the use of air-conditioner.
●Please refer to the manual for wire connection and the wiring technique should meet the
standard of the electrical installation.
●There is an AC voltage drop between the L and N terminal if the power is on. Therefore, be
sure to remove the plug from its socket.
WARNING
!
Wiring of The Outdoor Unit
●Please remove the side cover for wire connection.
WARNING
!
●If you cannot close the side cover due to the connecting cord, please tidy up the wiring for
spacing at front panel.
●Be sure that the hooks of the side cover is properly fixed to avoid water penetration. Otherwise
water leakage may occur and this causes short circuit or faults.
●The connectiong cord should not to service valve and pipe to avoid possibilities of burn.
(It become high temperature in heating operation.)
●The appliance incorporates an earth connection for functional purpose only.
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 gauges list below for the lead-in from a pole transformer and for the
wiring from a switch board of fuse box to the main switch and outdoor unit in consideration of the locked rotor
current.
●Investigate the power supply capacity and other electrical conditions at the installing location.
Depending on the model of room air conditioner to be installed, request the customer to make arrangements
for the necessary electrical work etc.
The electrical work includes the wiring work up the outdoor unit . In localities where electrical conditions are
poor, use of a voltage regulation is recommended.
!
WARNING
Fig. 1-2
Arrange power cord so they do not touch
service valve.
Bind
connecting
cords to
make them
fit between
the convex
sections.
Earth line
Type of grounding rod
SP-EB-2
Length
900mm
CAUTION
!
WARNING
●Connect the Connecting Cord to “Indoor 1 (1, 2, 3)” for indoor unit
1, “Indoor 2 (1, 2, 3)” for indoor unit 2.
!
Fig. 1-3
Note:
●The supply cord of appliances for
outdoor use shall be between 1.5m
& 3m long and shall be either an
EXTRA HARD USAGE or a HARD
USAGE CORD.
!
CAUTION
Cable type
3 Core
Cable type
4 Core
Cable length
up to 25m
Wire cross-section
14AWG (2.1mm2)
Wire cross-section
18AWG (0.8mm2)
IMPORTANT
For (Power cord - L, N, Earth)
For (Connecting cord - 1, 2, 3, Earth)
AC 220~240V
1ø 50Hz
Grounding
screw
Grounding
screw Grounding screw
Grounding screw Grounding screw
2.1mm (14AWG)
Connecting
cord 0.8mm2
(18AWG)
Connecting
cord 0.8mm2
(18AWG)
1. Installation procedure and notice
Especially, the selection of installation
place need great care for the split type air
conditioner, because it is very difficult to move
from place to place after the first installation.
1.1 Wiring
(1) Connect the electrical wiring between
the Indoor and Outdoor unit, as shown
in Fig. 1-1. Never connect the wiring by
mistake.
In case of wrong connection, the unit
does not operate properly and it may
cause malfunction.
1.2 Connection of the connecting cords
and power cord
(1) Cut off the connecting cord, the power
cord and strip the insulation of the wire,
as shown in Fig. 1-2.
(2) Connect the connecting cord and power
cord to the terminal board. (Fig. 1-3)
Fig. 1-1
FINAL STAGE OF INSTALLATION
1
● The connected terminals should be completely 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.
● Completely seal any gap with putty.
Power Source And Operation Test
2
Power Source
CAUTION
!
●Please use a new socket. Accident may occur due to the
use of old socket because of poor contact.
●Please plug in and then remove the plug for 2 – 3 times.
This is to ensure that the plug is completely plugged into
the socket.
●Keep additional length for the power cord and do not render
the plug under external force as this may cause poor contact.
●Do not fix the power cord with U-shape nail.
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.
●If the indoor unit does not operate, check to see that the
connections are correct.
Insulation material for pipe connection
Putty
Putty
Sleeve of
protection pipe
CAUTION
●Trial run should be conducted on one unit at a time
to check for incorrect wiring of connecting cord.
!
Outer
dia.of pipe
1/4”(6.35)
3/8”(9.52)
1/2”(12.70)
1/4”(6.35)
3/8”(9.52)
1/2”(12.7)
1/4”(6.35)
3/8”(9.52)
1/2”(12.7)
5/8”(15.87)
Spindle
Valve
head cap
Small dia. side
Large dia. side
Valve core cap
Small dia. side
Large dia. side
Small dia. side
Large dia. side
●THIS APPLIANCE MUST BE EARTHED.
Be sure to install a ground fault circuit interrupter. (One that can handle higher harmonics.)
(This unit uses an inverter. Therefore, a ground fault circuit interrupter capable of
handling higher harmonics must be used in order to prevent the ground fault circuit
interrupter malfunctioning).
WARNING
!
Outer
Diameter
inch(mm)
1/4”(6.35)
3/8”(9.52)
1/2”(12.70)
Clutch type
A mm
Wing nut type
Thickness
mm
0.8
0.8
0.8
0.0~0.5
0.0~0.5
0.0~0.5
Flare tool for R410A
Clutch type
Conventional flare tool
14.0~18.0
33.0~42.0
50.0~62.0
19.6~24.5
19.6~24.5
29.4~34.3
12.3~15.7
3.92~5.88
9.80~10.78
Tightening torque
N·m
IMPORTANT
Circuit Breaker
20A
1.0~1.5
1.0~1.5
1.0~1.5
1.5~2.0
1.5~2.0
1.5~2.0
< IA2221: A >