Hitachi RAM-18QH2A Installation Manual

FOR SERVICE PERSONNEL ONLY
SPLIT UNIT AIR CONDITIONER
INSTALLATION MANUAL
Outdoor Unit RAM-18QH2A
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 À gures indicates prohibition.
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 qualiÀ ed technician to install your unit. Water leakage, short circuit or À 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 À 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 the speciÀ ed 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 À re.
Please use the speciÀ ed components for installation work. Otherwise, the units may collapse or water leakage, electric shock
●
and À re may occur.
Be sure to use the speciÀ ed piping set for R-410A. Otherwise, this may result in broken copper pipes or faults.
●
● When installing or removing an air conditioner, only speciÀ 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 À 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 À re in the fan-driven heater, space heater, etc., a poisonous gas may occur.
● Unauthorized modiÀ cations to the air conditioner may be dangerous. If a breakdown occurs please call a qualiÀ ed air
conditioner technician or electrician. Improper repairs may result in water leakage, electric shock and À re, etc.
Be sure to connect the earth wire from the power supply wire to the outdoor unit and between the outdoor and indoor
●
unit. Improper earthing may cause electric shock.
● A circuit breaker must be installed in the house distribution box for the direct connected power supply wire to the outdoor
unit. In case of other installations a main switch with a contact gap or more than 3.5mm has to be installed. Without a
circuit breaker, the danger of electric shock exists.
● Do not install the unit near a location where there is Á ammable gas. The outdoor unit may catch À re if Á ammable
gas leaks around it. Piping shall be suitable supported with a maximum spacing of 1m between the supports.
● Be sure to tighten the Á are nut to the speciÀ ed torque using a torque wrench. If the Á are nut is tightened excessively, it may
crack as time elapses, cause refrigerant leakage.
● Please ensure smooth Á ow of water when installing the drain hose.
● An IEC approved power cord should be used. Power cord type: NYM.
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.
●
● 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 speciÀ ed in À gure 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 Á ammable 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.
Figure showing the Installation of Outdoor Unit.
Names of Outdoor Components
Height difference
No. Item Qty
Bush
Height difference between indoor units should
not be more than 5m.
10
2
Drain Pipe
11
1
Bush
12
1
Dimension of Mounting Stand
of the Outdoor unit
(unit: mm)
[Outdoor unit installation]
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.
CAUTION
Make sure to connect to
●
two indoor units.
One unit of 1.8kW, 2.5kW, 3.5kW
One unit of 1.8kW, 2.5kW, 3.5kW
To the outdoor unit, up to two indoor units can be connected until
the total nominal cooling capacity not more than 6.0 kW.
The pipe connection ports of the outdoor unit and connectable indoor
units are shown below.
< >
IA1089: A
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
( M a r k i s e x c l u s i v e u s e t o o l f o r R 4 1 0 A )
+ – Screwdriver Measuring Tape
● ●
Saw ø 65mm Power Drill Hexagonal Wrench
● ● ●
Key ( 4mm) Wrench (14, 17, 22, 26mm)
●
Leakage Detector Pipe Cutter
● ●
Pliers Flare Tool Vacuum Pump Adapter
● ●
Manifold Valve Charge Hose
WARNING
CAUTION
WARNING
CAUTION
Piping length
(L1 + L2) = Maximum 35m
Minimum piping length for each indoor unit is 5m.
Maximum piping length for one indoor unit is 25m.
Additional charge of refrigerant is not required.
When removing side cover, pull the handle
after releasing the hook by pulling it
downward.
Face this side (suction side) of
the unit to the wall.
Pull downward
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT
There are holes on the base of Outdoor unit for condensed
water to exhaust.
In order to Á ow 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 À gure. Join the drain pipe to
one hole.
At À rst 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 À rmly.
A
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 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.
If you wish to prepare the copper tubes and insulation material in the À eld, we recommend the following.
No.
1
Copper tube 2.0-2.5kW
2 Flare nut
2.0-2.5kW
Knife
●
3 Insulation for refrigerating pipe
Gas
Putty Vinyl Tape
●
4 Connecting cord
5 Vinyl tape
Vacuum Pump
6 Sealer (Putty)
7 Refrigerant oil
8 Bushing for refrigerating pipes
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 earthed.
WARNING
● Power is supplied through outdoor unit, do not connect power source to indoor unit.
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.
3. Installation procedure and notice
Especially, the selection of installation place need great care for the
split type air conditioner, because it is very difÀ cult to move from place
to place after the À rst installation.
3.1 Wiring
(1) Connect the electrical wiring between the Indoor and Outdoor unit,
as shown in Fig. 3-1. Never connect the wiring by mistake.
In case of wrong connection, the unit does not operate properly
and it may cause malfunction.
(2) The connecting cord must be À xed by the band which is located
near the terminal board.
Procedures of Wiring
The naked part of the wire core should be 10 mm and À x 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
●
(fuse = 16A time delay)
● 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 drop between the L and N terminals. Therefore, before servicing, be sure to switch off the main switch.
Wiring of The Outdoor Unit
Please remove the side cover for wire connection.
●
● If you cannot attach the side cover due to the connecting cord, press the connecting cord in direction to the front panel
to À x it.
● Be sure that the hooks of the side cover is À xed in certainly. Otherwise water leakage may occur and this causes short
circuit or faults.
WARNING
The connecting cord should not touch to service valve and pipes. (It becomes high temperature in heating operation.)
●
3.3 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.
IMPORTANT
Cable length
up to 16m
up to 15m
up to 25m
Bind connecting cords to make them
À t between the convex sections.
Remove side cover
when connecting the
piping and connecting
cord.
Grounding rod (optional)
(Earth wire and grounding rod are not supplied. Please use optional items below.)
Investigate the power supply capacity and other electrical conditions at the installation 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 outlet. In localities where electrical conditions are
poor, use of a voltage regulation is recommended.
IMPORTANT
Fuse Capacity
16A time delay fuse
Material
Small dia. Deoxidized annealed copper pipe with 6.35mm O.D., 0.8mm wall thickness.
Large dia. Deoxidized annealed copper pipe with 9.52mm O.D., 1.0mm wall thickness.
Flare nuts with 6.35mm O.D..
Small dia.
Large dia. Flare nuts with 9.52mm O.D..
Foamed polyethylene insulation pipe which does not corrode the copper tube.
● Large dia. pipe side: 15mm I.D.., 8mm wall thickness.
● Small dia. pipe side: 8mm I.D., 7mm wall thickness.
Refer to item 3.3.
3.2 Connection of the connecting cords and power cord
(1) Cut off the connecting cord, the power cord and strip the
(2) Connect the connecting cord and power cord to the terminal
(3) Fix the connecting cords and power cord with steel band
Fig. 3-1
WARNING
Wire cross-section
1.5mm 2
Connect the Connecting Cord to C1 and D1 "Indoor 1" for indoor unit
●
2.5mm 2
1, C2 and D2 "Indoor 2" for indoor unit 2.
4.0mm 2
CAUTION
Arrange power cord so they do
not touch service valve.
Earth line
Type of grounding rod Length
SP-EB-2 900mm
SpeciÀ cation
insulation of the wire, as shown in Fig. 3-2.
board. (Fig. 3-3)
certainly. (Fig. 3-3)
Fig. 3-2
WARNING
Fig. 3-3 CAUTION
Note:
Outdoor supply cords shall not
●
be lighter than polychloroprene
sheathed Á exible cord with code
designation 60245 IEC 57.
2 .