Hitachi RAW-XH07CA User manual

&
HO20
2247
7
HA
Window Type Air Conditioner
R32 Inverter Cooling
only Series
Model
RAW-XH07CA
RAW-XH10CA
RAW-XH13CA
RAW-XH18CA
RAW-XH24CA
INSTALLATION
& OPERATION
MANUAL
This appliance is using R32 mildly flammable
refrigerant.
Access the full version
of the Manual
by scanning the code.

R32 SAFETY PRECAUTIONS
i
Installation
- Must ensure the installation performed by an authorized dealer or professionally trained technician
- Must ensure the installation of pipe-work shall be kept to a minimum. Avoid to use dented pipe and
do not allow acute bending.
- Must ensure that pipe-work shall be protected from physical damage.
- Must comply with national gas regulations, state municipal rules and legislation. Notify relevant
authorities in accordance with all applicable regulations.
- Must ensure mechanical connections be accessible for maintenance purposes.
Unventilated areas
- Warning: The appliance shall be stored in a well-ventilated area where the room size corresponds to
the room area as specified.
- Warning: The appliance shall be stored in a room without continuously operating open flames (e.g. an
operating gas appliance) and ignition sources (e.g. an operating electric heater).
Qualification of workers
- When conducting any repair/servicing works, please ensure it is carried out by competent person
only.
- Warning: Every working procedure that affects safety means shall only be carried out by competent
persons.
Examples for these working procedures are:
- breaking into the refrigerating circuit.
- opening of sealed components
- opening of ventilated enclosures.
Information on servicing
- Prior to beginning work on systems, safety checks are necessary to ensure that the risk of ignition is
minimized.
- Work shall be undertaken under a controlled procedure so as to minimize the risk of flammable gas
or vapor being present while the work is being performed.
- Work in confined spaces shall be avoided. The area around the workspace shall be sectioned off.
Ensure that the conditions within the area have been made safe by control of flammable material.
Checking for presence of refrigerant
- The area shall be checked with an appropriate refrigerant detector prior to and during work. The leak
detection equipment should be suitable for use with all applicable refrigerants, i.e. non-sparking,
adequately sealed or intrinsically safe.
Presence of fire extinguisher
- If any hot work is to be conducted, appropriate fire extinquishing equipment shall be available on
hand. Have a dry powder or CO2 fire extinguisher adjacent to the charging area.

R32 SAFETY PRECAUTIONS
ii
No ignition sources
- All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from
the site of installation, repairing, removing and disposal. Prior to work taking place, the area around the
equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. "No
Smoking" signs shall be displayed.
Ventilated area
- Ensure that the area is in the open or that it is adequately ventilated before breaking into the system
or conducting any hot work. A degree of ventilation shall continue during the period that the work is
carried out. The ventilation should safely disperse any released refrigerant and preferably expel it
externally into the atmosphere.
Checks to the refrigeration equipment
- When electrical components are being changed, they shall be fit for the purpose and to the correct
specification. At all times the manufacturer's maintenance and service guidelines shall be followed. If in
doubt, consult the manufacturer's technical department for assistance.
The following checks shall be applied to installations.
- The charge size is in accordance with the room size within which the refrigerant containing parts are
installed;
- The ventilation machinery and outlets are operating adequately and are not obstructed;
- If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence
of refrigerant;
- Markings on the equipment continues to be visible and legible. Markings and signs that are illegible
shall be corrected;
- Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to
any substance which may corrode refrigerant containing components, unless the components are
constructed or materials which are inherently resistant to being corroded or are suitably protected
against being so corroded.
Checks to electrical devices
- Repair and maintenance to electrical components shall include initial safety checks and component
inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall be
connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately
but it is necessary to continue operation, an adequate temporary solution shall be used. This shall be
reported to the owner of the equipment so all parties are advised.
- Initial safety checks shall include:
• that capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
• that no live electrical components and wiring are exposed while charging, recovering or purging the
system,
• that there is continuity of earth bonding.

R32 SAFETY PRECAUTIONS
iii
Repairs to sealed components
- During repairs to sealed components, all electrical supplies shall be disconnected prior to any removal
of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment during
servicing, then a permanently operating form of leak detection shall be located at the most critical
point to warn of a potentially hazardous situation.
- Ensure that by working on electrical components, the casing is not altered in such a way that the level
of protection is affected, including damage to cables, excessive number of connections, terminals not
made to original specification, damage to seals, incorrect fitting of glands, etc.
- Ensure that the apparatus is mounted securely.
- Ensure that seals or sealing materials have not degraded to the point that they no longer serve the
purpose of preventing the ingress of flammable atmospheres. Replacement parts shall be in accordance
with the manufacturer’s specifications
Repair to intrinsically safe components
- Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this
will not exceed the permissible voltage and current permitted for the equipment in use.
- Intrinsically safe components are the only types that can be worked on while live in the presence of a
flammable atmosphere.
- Replace components only with parts specified by the manufacturer. Other parts may result in the
ignition of refrigerant in the atmosphere from a leak.
Cabling
- Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or
any other adverse environmental effects. The check shall also take into account the effects of aging or
continual vibration from sources such as compressors or fans.
Detection of flammable refrigerants
Under no circumstances shall potential sources of ignition be used in the searching for or detection of
refrigerant leaks. A halide torch (or any other detector using a naked flame) shall not be used.
The following leak detection methods are deemed acceptable for all refrigerant systems.
Electronic leak detectors may be used to detect refrigerant leaks but, in the case of flammable
refrigerants, the sensitivity may not be adequate, or may need re-calibration. (Detection equipment
shall be calibrated in a refrigerant-free area.) Ensure that detector is not a potential source of ignition
and is suitable for the refrigerant used. Leak detection equipment shall be set at a percentage of the
LFL of the refrigerant and shall be calibrated to the refrigerant employed, and the appropriate
percentage of gas (25% maximum) is confirmed.
Leak detection fluids are also suitable for use with most refrigerants but the use of detergents
containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the
copper pipe-work.
NOTE: Example of leak detection fluids are
-bubble method,
-fluorescent method agents.

R32 SAFETY PRECAUTIONS
iv
Max. Refrigerant charge
Model number
R32 Max. Refrigerant charge
(kg)
Minimum installation height
RAW-XH07CA
0.43
750mm
RAW-XH10CA
0.43
750mm
RAW-XH13CA
0.435
750mm
RAW-XH18CA
0.63
750mm
RAW-XH24CA
0.71
750mm
- Based on IEC 60335-2-40, there is no restriction for the minimum installation floor area since the
refrigerant charges is less than 1.842kg.
Removal and evacuation
- The refrigerant charge shall be recovered into the correct recovery cylinders and the system shall be
"flushed" with oxygen free nitrogen (OFN) to render the unit safe. This process may need to be
repeated several times.
- Compressed air or oxygen shall not be used for purging refrigerant systems.
- Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until
the working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum.
This process shall be repeated until no refrigerant is within the system. When the final OFN charge is
used, the system shall be vented down to atmospheric pressure to enable work to take place.
- The vacuum pump should not near to any ignition sources and ensure that ventilation is available at
all times
Charging procedures
- Ensure that contamination of different refrigerants does not occur when using charging equipment.
Hoses or lines shall be as short as possible to minimise the amount of refrigerant contained in them.
- Cylinders shall be kept upright.
- Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.
- Label the system when charging is complete (if not labelled).
- Extreme care shall be taken not to overfill the refrigeration system.
- Prior to recharging the system, it shall be pressure-tested with the appropriate purging gas. The
system shall be leak-tested on completion of charging but prior to commissioning. A follow up leak test
shall be carried out prior to leaving the site.
Decommissioning
- Before carrying out this procedure, it is essential that the technician is completely familiar with the
equipment and all its detail.
- Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is
required prior to re-use of reclaimed refrigerant.
- Electrical power must be available before the task is commenced.

R32 SAFETY PRECAUTIONS
v
- Become familiar with the equipment and its operation.
- Isolate system electrically.
- Before attempting the procedure, ensure that:
• mechanical handling equipment is available for handling refrigerant cylinders; (if required)
• all personal protective equipment is available and being used correctly;
• the recovery process is supervised at all times by a competent person;
• recovery equipment and cylinders conform to the appropriate standards.
- Pump down refrigerant system, if possible.
- If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of
the system
- Make sure that cylinder is situated on the scales before recovery takes place
- Start the recovery machine and operate in accordance with manufacturer's instructions.
- Do not overfill cylinders. (No more than 80 % volume liquid charge).
- Do not exceed the maximum working pressure of the cylinder, even temporarily.
- When the cylinders have been filled correctly and the process completed, make sure that the cylinders
and the equipment are removed from site promptly and all isolation valves on the equipment are
closed off.
- Recovered refrigerant shall not be charged into another refrigeration system unless it has been
cleaned and checked.
Labelling
- Equipment shall be labelled stating that it has been decommissioned and emptied of refrigerant. The
label shall be dated and signed.
- Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.
Recovery
When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders
are employed.
- Ensure that the correct number of cylinders for holding the total system charge are available. All
cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e.
special cylinders for the recovery of refrigerant).
- Cylinders shall be complete with pressure-relief valve and associated shut-off valves in good working
order. Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.
- The recovery equipment shall be in good working order with a set of instructions concerning the
equipment that is at hand and shall be suitable for the recovery of all appropriate refrigerants.
- A set of calibrated weighing scales shall be available and in good working order. Hoses shall be
complete with leak-free disconnect couplings and in good condition. Before using the recovery
machine, check that it is in satisfactory working order, has been properly maintained and that any
associated electrical components are sealed to prevent ignition in the event of a refrigerant release.

R32 SAFETY PRECAUTIONS
vi
- The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder,
and the relevant waste transfer note arranged.
- Do not mix refrigerants in recovery units and especially not in cylinders.
- If compressors or compressor oils are to be removed, ensure that they have been evacuated to an
acceptable level to make certain that flammable refrigerant does not remain within the lubricant.
- The evacuation process shall be carried out prior to returning the compressor to the suppliers
- Only electric heating to the compressor body shall be employed to accelerate this process.

Structure mechanism and Installation
Explanation of Symbol
7
-
1
-
WARNING: Appliance filled with mildly flammable gas R32.
CAUTION: Before using the appliance, read the installation & operation manual first.
CAUTION: Information is available such as the installation & operation manual.
CAUTION: Before repairing the appliance, read the service manual first.
Indicates a hazardous situation that, if not avoided, will result in
death or serious injury.
Indicates a hazardous situation that, if not avoided, could result in
death or serious injury.
Indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury.
Indicates important but not hazard-related information, used to
indicate risk of property damage.
Indicates a hazard that would be assigned a signal word WARNING
or CAUTION.
Installation Requirement
The minimum installation height is 750mm.
Based on IEC-60335-2-40, there is no restriction for the minimum installation floor area since
the refrigerant charges is less than 1.842kg.
Installation must be performed by an authorized dealer or professionally trained technician.

-
2
-
Structure mechanism and Installation
Exception Clauses
Manufacturer will bear no responsibilities when personal injury or property loss is caused by
the following reasons.
1. Damage the product due to improper use of misuse of the product;
2. Alter, change, maintain or use the product with other equipment without abiding by
the instruction manual of manufacturer;
3. After verification, the defect of the product is directly caused by corrosive gas;
4. After verification, the defects are due to improper operation during transportation of
product;
5. Operate, repair, maintain the unit without abiding by instruction manual or related
regulations;
6. After verification, the problem or dispute is caused by the quality specification or
performance of parts and components that produced by other manufacturers;
7. The damage is caused by natural calamities, bad using environment or force
majeure.
7
If it needs to install, move or maintain the air conditioner, please contact dealer
or local service center to conduct it at first. Air conditioner must be installed,
moved or maintained by appointed unit. Otherwise, it may cause serious damage
or personal injury or death.
When refrigerant leaks or requires discharge during installation, maintenance, or
disassembly, it should be handled by certified professionals or otherwise in
compliance with local laws and regulations.

-
3
-
Structure mechanism and Installation
Operating condition
Please operate air conditioner in the correct conditions as follows.
COOL mode operation DRY mode operation
Outdoor temperature should be in
Otherwise it is possible for air
conditioner to breakdown.
Outdoor temperature should be in
range of 18 to 43
Otherwise it is possible for air
conditioner to breakdown.
Room humidity should be lower
than 90%. Otherwise, it is possible
for air conditioner to dew at the
surface and even drop water after
running for a long period of time,
but this is normal.
Please refer to P.
4
for indoor
temp
era
ture range.
Power requirement
Rated Voltage: 220V +/
-
10%
The electric components will be damaged when
the voltage is too high. If the voltage is too low,
the compressor will vibrate violently to damage
the refrigerant system and easily cause the
compressor and electric components not working.
The ground must be connected.
Special socket must be used. Furthermore, the socket
and wiring must conform to the wiring regulations.
And the earthing method must be reliable.
In fixed circuit, there must be electricity leakage
protection switch of enough power capacity and air
switch with enough space.
To ensure the reliable earthing, please do not connect
earth wire to the following places: