Hitachi RPIL-B18TFTANA User manual
- Category
- Split-system air conditioners
- Type
- User manual
＿
INSTALLATION
& MAINTENANCE
MANUAL
air
LARGE SINGLE SPLIT
INVERTER SERIES
INDOOR & OUTDOOR UNITS
DUCTED UNIT
HITACHI
EN INSTRUCTION MANUAL
Hl2022522H A
Caution Statements................................................................................................................ 15
Composition of the Air Conditioner...................................................................................... 17
Operation Manual ................................................................................................................... 18
Special Remarks ...................................................................................................................... 18
Troubleshooting........................................................................................................................ 19
Diagram of Refrigerant Cycle
Refrigerant Flow Diagram......................................................................................................... 20
Installation and Maintenance
1. Safety Notice ........................................................................................................................21
2. Tools and Instruments for Installation ..................................................................................22
3. Installation of the Indoor Unit.................................................................................................22
3.1 Initial Check .................................................................................................................... 22
3.2 Installation........................................................................................................................23
4. Indoor Unit Refrigerant Pipe ................................................................................................. 25
4.1 The Pipe Material ............................................................................................................ 25
4.2 The Connection of the Pipe............................................................................................. 25
5. Drain Piping .......................................................................................................................... 26
6. Electrical wiring..................................................................................................................... 27
6.1 General Check.................................................................................................................27
6.2 Electrical Wiring Diagram ................................................................................................27
6.3 Change of Static Pressure...............................................................................................28
7. Installation of the Outdoor Unit ..............................................................................................29
7.1 Installation Sites ..............................................................................................................29
7.2 Installation of the Outdoor Unit ........................................................................................29
8. Refrigerant Piping................................................................................................................. 30
8.1 Flaring with Pipe Expander..............................................................................................30
8.2 Connecting Piping between Indoor and Outdoor Units ...................................................30
8.3 Heat Insulation of the Refrigerant Pipe............................................................................30
8.4 Sealing the Pipes.............................................................................................................30
8.5 Finishing the Installation ..................................................................................................30
9. Vacuuming and Test Run...................................................................................................... 31
9.1 Vacuuming with a Vacuum Pump ................................................................................... 31
9.2 Leak Test......................................................................................................................... 31
9.3 Cleaning the Piping..........................................................................................................31
9.4 Test Run.......................................................................................................................... 31
9.5 Electrical Installation ....................................................................................................... 32
Contents
Safety Precautions
Unpacking the unit instructions ............................................................................................33
1
There are symbols on both indoor and outdoor equipment.
Warning
(Risk of fire)
This symbol applies to the R32 refrigerant, the
type of which is on the label of the outdoor unit.
In the case of this refrigerant, the R32 unit uses
a flammable refrigerant.
Yes, if this refrigerant leaks and is exposed to
an open flame or a heated part.
It may produce harmful gases and pose a fire
hazard.
Please read the instruction manual carefully before proceeding.
Maintenance personnel should read the user manual and installation
manual carefully before operation.
More information can be found in user manuals, installation manuals,
and other similar documents.
1. Safety measure
•Before installing or operating an air conditioner, read all safety information described in this
manual carefully.
•The warnings and precautions outlined in this manual are relevant to your safety and should
therefore be noted and cautioned.
Give this manual together with the instruction manual to the customer and inform the customer to
keep both manuals for future reference, such as when repositioning or repairing the air conditioner.
•The manufacturer shall not be liable for damage caused by neglect to follow the instructions in
this manual.
Warning
Indicates an obvious or potentially dangerous situation that, if not
avoided, could result in death or serious injury.
Caution
Indicates a potentially dangerous situation that could result in mild or
moderate injury or property damage.
Warning
•To avoid electric shock, do not touch electrical parts immediately after turning off the
power, and wait at least 10 minutes or more after turning off the power before touching
electrical parts.
•Installation of this device should only be performed by experienced maintenance
personnel or skilled installation personnel who are installed in accordance with this
manual. Unskilled installation or incorrect installation may result in serious accidents
such as injury, water leakage, electric shock, or fire. If this device is not installed in
accordance with this manual, the manufacturer's warranty will be void immediately.
2
• Do not turn on the lights until the entire operation is completed, if the lights are turned on
before the entire operation is completed, it may cause serious accidents such as electric
shock or fire.
• If the leaking air conditioner comes into direct contact with the flame, toxic gases may be
produced.
• Installation must comply with the regulations, regulations or standards for cabling
systems and equipment in each country, region or installation location.
• Do not use this unit with air or any other air conditioner not specified in the air hose,
excessive pressure can cause rupture.
• During the installation process, before starting the compressor, be sure to install the air
conditioner hose firmly. If the air hose is not properly installed and the 2-way or 3-way
valve is open, do not operate the compressor, otherwise it may cause abnormal
pressure in the cooling circuit until it breaks or may cause injury.
• When installing or repositioning an air conditioner, do not mix any other gases into the
cooling loop than the specified air conditioner (R32). If air or other gases enter the
refrigeration loop, the pressure in the loop can rise to abnormal levels and may cause
rupture or injury.
• In order for the air conditioner to work properly, install it according to the instructions in
this manual.
• To connect indoor equipment, outdoor equipment or branch boxes, air conditioning
ducts and wires should be purchased from a local dealer.
• Do not modify the power cord, use an extension cord or connect a separate power cord,
improper use may cause electric shock or fire due to poor connection, poor insulation or
overcurrent.
• Do not use air steam to exhaust the air, but use the vacuum pump to exhaust the air
generated by the device.
• In the outdoor unit, no air conditioner is added for discharging air.
• Do not use any method to speed up the melting or cleaning process unless advised by
the manufacturer.
• The unit should be stored periodically in a room without a spark source (for example, a
gas stove flame or an electric heater in operation).
• Do not Pierce or burn.
• Be careful, the air conditioner might not smell.
• Using the same vacuum pump with a different type of air conditioner may damage the
vacuum pump or air conditioner.
• Use vacuum pump assembly gauge and clean air filling hose between R32 or R410A,
respectively.
• Do not modify the unit, such as drilling holes in the air conditioner.
• During the pumping process, the air conditioner should ensure that the compressor is
turned off, and do not remove the extension hose with the compressor running and the
2-way or 3-way valve open before removing the air conditioner hose, otherwise it may
cause abnormal pressure in the cooling circuit, which can lead to rupture or injury.
Caution
• This equipment must be installed by certified and qualified technicians who can only handle
liquid air conditioning water, please refer to the applicable regulations and l aws in the area
where this equipment is installed.
• Install this device in accordance with the applicable local laws and regulations at the
installation site and follow the procedures specified by the manufacturer.
3
• This unit is part of the package that makes up this air conditioner and cannot be installed in
complete sets or with equipment not authorized by the manufacturer.
• When a pipe less than 3 meters in length is installed, the sound of the outdoor unit will be
transmitted to the indoor unit, which may produce working noise or abnormal noise.
• With the support of His Majesty the King, air conditioners must be in stalled in accordance
with the Thai Electrical Installation standards of the Engineering Society of Thailand. (TIS)
• This product must be equipped with a leakage protection device (ELCB) or electric shock
Protection device (RCD) with a sensitivity of 30 mAh and a time of 0.1 seconds or less,
otherwise it may cause electric shock or fire in the event of a failure of the device or
insulation.
• The device does not have explosion-proof performance, so it should not be installed in
explosive weather conditions.
• This device has no user repairable parts, please consult authorized maintenance personnel
during maintenance.
• When moving or relocating the air conditioner, consult an experienced maintenance person
to remove and reinstall the unit.
• Young children should be controlled to ensure that they do not come to play with this
electrical device.
• This device is not intended for use by persons (including children) with physical, sensory or
mental impairments or lack of experience or knowledge, unless their use is supervised or
directed by those responsible for their safety.
• Do not touch the aluminum heat sink of the heat exchanger located inside the indoor and
outdoor equipment to avoid injury during installation or maintenance.
• Do not place other appliances or household appliances under appliances indoors and
outdoors, water droplets from condensation of appliances may make them wet and may
cause property damage or failure.
Precautions for using air conditioners R32
The initial installation process is the same as for conventional air conditioner models (R410A, R22),
however, please note and be careful with the following poin ts.:
Warning
• Because the working pressure is higher than the working pressure of the R221.6 air servant
model, some pipes and fixtures and maintenance tools are different. (See section "2.1
Special Tools for Air Conditioning R32 (R410A)"), especially when replacing an R22 air
conditioner model with a new R32 air conditioner model, the door ducts and extension nuts
should be replaced with connecting ducts and nuts for R32 and R410A.
• The R32 and R410A models have different sizes of spiral diameters to prevent the wrong
type of air conditioner from being incorporated into the R22, and for safety reasons, so it's
always a good idea to check first. [Air intakes R32 and R410A have 1/2 inch thread
diameters.]
• Be more careful than the R22 air conditioning model, taking care not to let foreign objects
(such as oil, etc.) into the pipe.
In addition, when storing pipes, the opening should be tightly sealed, such as paste, tape,
etc. (The method for R32 is the same as for R410A).
4
- If the unventilated area is smaller than the minimum installation area, the air conditioner
should not be installed in this area.
- The installation height is the minimum installation height, that is, the minimum installation
height of the cold air pipe or indoor unit, whichever is the lowest. The following table is
determined according to the minimum installation height of 1.8 meters and 2.2 meters
- If the required minimum installation height is less than 1.8 meters, the minimum installation
space must be recalculated.
Minimum Room Size Table for installation (Amin)
The amount of refrigerant
to be filled (M) (kg)
Minimum room area (Amin) (m²)
Installation Height (ho) (m)
1.8
2.2
M ≤ 1.224
--
--
1.224 < M ≤ 1.836
3.25
2.15
1.836 < M ≤ 2.448
5.75
3.85
2.448 < M ≤ 3.672
13.00
8.70
3.672 < M ≤ 4.896
23.00
15.30
4.896 < M ≤ 6.12
36.00
24.00
6.12 < M ≤ 7.956
60.40
40.40
Refrigerant packaging cost table (M max)
Minimum room area
(Amin) (m²)
The amount of refrigerant filled (M) (kg)
Installation Height (ho) (m)
1.8
2.2
Amin ≤ 4
2.05
2.50
4 < Amin ≤ 7
2.71
3.31
7 < Amin ≤ 10
3.24
3.96
10 < Amin ≤ 15
3.97
4.85
15 < Amin ≤ 20
4.58
5.60
20 < Amin ≤ 30
5.61
6.86
30 < Amin ≤ 50
7.24
8.85
1. Installation (area)
• Installation area with minimal piping
• Installation area to protect piping from physical damage
• Installation area complies with national gas regulations
• The installation area can be maintained using mechanical connections
• If mechanical ventilation is required, the vents must not be blocked by anything.
• To dispose of this equipment, it should comply with national regulations and operate
normally.
2. Maintenance
2-1. Maintenance Officer
Caution
5
• Individuals involved in operating or able to manage the air conditioning cycle should hold a
valid qualification issued by an industrial certification assessment body, which has the
authority to certify skills.
• The ability to operate air conditioners safely according to instructions approved by industry
authorities
• Maintenance and repairs requiring the assistance of qualified technicians must be carried
out under the supervision of technicians skilled in the use of flammable air conditioners.
• Repairs can only be carried out according to the manufacturer's recommendations.
2-2. Working
• Safety checks must be carried out before starting to operate flammable air conditioning
filling systems to ensure that the risk of flammability is minimized, and then precautions 2-2
to 2-8 should be followed when repairing the refrigeration system before operating the
system.
• Work should be carried out in a well-controlled manner to minimize the risk of combustible
gases or vapors during operation.
• All maintenance personnel and others working nearby must be aware of the work being
done.
• You shouldn't work in tight Spaces.
• The area around the work area should be separated.
• Ensure safe working conditions in the area by controlling flammable materials.
2-3. Checking if there is air conditioner
• Before and during operation, the area should be checked with a suitable air conditioning
detector in order to
• Does the technician know if there are flammable substances in the workplace air
• Ensure that the leak detection equipment used is suitable for flammable air condition ers.
• For example, depending on the condition characteristics of the device, it does not produce
sparks, is sealed or secure.
2-4. Preparation of fire extinguishers
• If heat is used for the operation of air conditioning equipment or any other component, fire
extinguishing equipment should be available at hand.
• Prepare a dry powder or CO2 fire extinguisher near the air conditioner filling area.
2-5. No fire source
• Workers who use refrigeration systems for plumbing work or add air conditioning should not
use any fire source that could cause a fire or explosion.
• All sources of combustible fire, including smoking, should be kept away from where
equipment is being installed, serviced, moved or handled, during which time air vapors may
be discharged into the surrounding area.
• Before working, check the area around the equipment to ensure that there is no risk of
flammable or flammable hazards. Combustible materials should be labeled "No smoking".
2-6. Ventilated area
• Make sure the area is open or well ventilated before entering the system or doing any high
heat work.
• The ventilation level should work continuously during operation.
• Ventilation should be safely ventilated to the air conditioning, and the air medicine is well
driven to the outside atmosphere.
2-7. Refrigeration Equipment Inspection
• If electrical parts are replaced, they must be fit for use and meet the correct specifications.
• Always follow the manufacturer's service and maintenance instructions.
• If in doubt, please consult and assist the manufacturer's technical department.
• The installation site checklist for the use of flammable air conditioners should be followed
as follows:
- The fill size will depend on the size of the room in which the air conditioner filler is installed.
6
- The equipment and vents are working properly and nothing is blocking them.
- If the air conditioner water circuit is used indirectly, check the presence of air conditioner
water.
- Text on the device must be clear and easy to read, and difficult-to-read text and symbols
should be corrected.
- Air conditioning ducts or components should be installed in a position where they will not
be corroded by any substance, unless these components are made of corrosion -resistant or
well-protected materials.
2-8. Electrical Equipment Inspection
• Repair and maintenance of electrical components shall include a preliminary safety check
and component inspection procedure.
• If an abnormal condition affecting safety is observed, electrical connections should not be
connected to the circuit until the fault is rectified.
• If such an exception cannot be corrected immediately and work needs to be resumed, an
appropriate temporary solution should be used.
• Any anomalies should be reported to the equipment owner so that all relevant parties can
be notified.
• The initial security check should include:
- Check capacitor discharge: This should be done safely to avoid sparking.
- Check that no live electrical parts or wires remain open while refueling, servicing, or
draining air from the system.
- Check the continuity of the grounding.
3. Repair of sealing parts
• When servicing sealed components, all power to the operating device must be cut off
before removing covered covers, etc.
• If it is absolutely necessary to supply electricity to the device during maintenance, there
must be a leak monitoring method that works around the clock at the most critical point, to
warn of possible dangerous situations.
• Special care should be taken to ensure that the housing does not undergo changes that
affect the level of hazard protection when electrical components are used. These problems
include broken wires, too many connections, electrical connectors that do not meet original
specifications, sealing materials, tearing, inserting improperly compressed bushings, etc.
• Make sure the device is securely connected.
• Ensure that the seal or sealing material used does not deteriorate to the extent that it
prevents air and water from leaking into the atmosphere.
• Replacement parts must meet the manufacturer's specifications.
Detailed rules and regulations: The use of silicone sealants may reduce the effectiveness of
some leak detectors.
The internal safety components must not be removed before using such equipment.
4. Maintenance of internal safety components
• Charging loads or permanent current-sensing loads should not be applied to circuits without
verification that exceed the voltage and current permitted by the air conditioner used.
• When the air contains flammable substances, the internal safety components are the only
ones that can operate.
• The test instrument shall have accurate coordinates.
• Replace parts only with spare parts specified by the manufacturer.
• If other spare parts are used, it may cause air conditioning water to leak into the
atmosphere and catch fire.
5. Wiring
• Check the wiring to ensure that it is not subject to tearing, corrosion and extreme pressure.
• Too sharp edge vibration or any other harsh environmental effects.
7
• Such inspections should take into account the effects of service life or continuous vibration
from sources such as compressors or fans.
6. Detection of flammable air conditioners
• Do not use fire sources to locate or detect air conditioning water leaks.
• Do not use a leak detection flame head (or any other detection device that uses an open
flame).
7. How to detect leaks
• An electronic leak detector should be used to detect flammable air conditioners, but the
sensitivity value may not be sufficient or may need to be recalibrated.
• Make sure the leak detector is not a source of fire and is suitable for the air condition er
being used.
• The leak detector should be set to a percentage of the air conditioner LFL and should be
calibrated with the air conditioner used to confirm the correct gas percentage (up to 25%).
• Liquids with leak detection properties are suitable for most pharmaceutical applications and
chlorine-containing laundry water should not be used as chlorine may interact with air
conditioning and corrode copper pipes.
• If a leak is suspected, extinguish or extinguish the fire.
• If an air conditioner leak that requires soldering of pipes is found, all air conditioning water
must be transferred or separated from the system (by closing various valves and storing in
a part of the system away from such leaks).
• Nitrogen gas (OFN) is used to remove air from the system before and during the bonding
process.
8. Air conditioner water transfer
• General procedures should be followed when opening the air conditioning circuit for repair
or for any other purpose
• However, it is important to follow best practices because of flammability and flammability
• Something to remember
• The following procedures should be followed:
o Air conditioning
o Use inert gases to remove air from the loop
o Rinse
o Revent the air with an inert gas.
o Open the circuit by cutting or brazing
• Air conditioning refills should be pumped using appropriate drainage cylinders.
• OFN should be used to "clean" the system to ensure system safety.
• This procedure may need to be repeated several times.
• Do not use compressed air or oxygen for this operation .
• Flushing is completed by destroying the vacuum in the system using OFN, increasing the
vacuum to the pressure generated by the operation, then venting it into the atmosphere and
finally into the vacuum.
• This process should be repeated several times until there is no air conditioning in the
system.
• When the last OFN is added, the system should be drained to atmospheric pressure in
order to be able to work.
• This work is especially important when welding on pipes.
• Ensure that the outlet of the vacuum pump is not near any fire source and can be ventilated.
9. Guidelines for refilling the air conditioner
• In addition to general refueling practices, the following regulations should be followed:
o When using air conditioning filling equipment, ensure that different types of air
conditioning are free from contamination.
o Hoses or hoses should be as short as possible to minimize the amount of air fluid
contained in such hoses and hoses.
8
o The air conditioner transfer cylinder should be kept upright.
o Be sure to ground the cooling system before adding the air conditioner to the system.
o When filling is complete, close the system label (if it is not already there).
o Be very careful not to add too much air conditioning to the cooling system.
• OFN should be used to test the pressure before adding air conditioning to the system.
• After the air conditioner is full, check the system for leaks before use.
• Check for releaks before leaving the installation site.
10. Deactivating the system
• Before performing this exercise, it is very important that the technician thorou ghly
understand the equipment and its details
• It is important to remove all air conditioners safely
• Prior to this, air and oil samples should be analyzed before the pumped air is reused
• It is important to have available electricity before starting the operation
a) Must know the equipment and its operation.
b) Electrical isolation system.
c) Before following the Code of Conduct, ensure that:
▪ There are devices for managing the various mechanisms of the air
conditioning transfer cylinder
▪ All personal protective equipment should be provided and properly worn
▪ The process of pumping out the air conditioner must be supervised by
qualified technicians at all times
▪ Air conditioning drainage equipment and cylinders must meet the required
standards
d) Drug aspiration if possible.
e) If there is no vacuum, use combined hoses to draw air conditioning water from
different parts of the system.
f) Make sure the cylinder is set correctly before pumping.
g) Start pump and follow manufacturer's instructions.
h) Do not allow the cylinder to overflow (not more than 80% of the liquid air volume).
i) Do not expose the cylinder to excessive working pressure, even temporarily.
j) When the cylinder is filled as planned and the process is complete, ensure that th e
cylinder and its equipment are removed from the working area and the isolation
valve located on the equipment is closed.
k) The pumped air conditioner shall not be re-injected into another cooling system
unless the system has been cleaned and inspected.
11. Close tag
• Signs on appliances should be turned off to indicate that the system is turned off and the air
conditioning water has been used up.
• Signs should be dated and marked.
• Make sure the label on the appliance indicates that the air conditioner is flammable.
12. Reparation
• When draining the air conditioner from the system, whether for maintenance or to
deactivate the system, it is important to take out all the air conditioner water safely.
• When transferring air conditioner to cylinders, be sure to use only suitable air conditioner
cylinders.
• Ensure that the number of cylinders suitable for all air-filled systems is sufficient.
• All cylinders used to drain the air conditioner should be determined and the indicator sign
should be closed (for example, a special cylinder for pumping air conditioner water out of
the system).
• The cylinder should be equipped with a pressure reducing valve and work in the correct
working sequence relative to the open valve.
9
• If possible, the cylinders used to pump the air conditioner should be flushed from a system
that does not contain the air conditioner and cooled before starting to pump the air
conditioner from the system.
• The equipment used to pump air conditioning water from the system should be placed in
the correct working order, the documentation shows that the working procedures for the
equipment are at hand, and the equipment used to pump air conditioning water from the
system should be suitable for pumping flammable air conditioning from the system.
• In addition, the scale should be calibrated and placed in the correct working order.
• Pipes shall have leak-free joints in good condition.
• Before using the pump, check that the pump is in the correct working condition, that the
pump is kept in good condition, and that the associated electrical components are sealed to
prevent air conditioning from discharging. If there is a concern, it is better to consult the
manufacturer.
• Air conditioners withdrawn from the system should be placed in the air conditioner transfer
canisters removed from the system and returned to the air conditioner dealer, and waste
transfer documents should be prepared in accordance with regulations
• Do not mix air conditioning in the pump, especially in the cylinder.
• If the compressor or compressor oil flows, make sure to clean the compressor or
compressor oil to an acceptable level to ensure that flammable air conditioning does not
remain in the lubricant.
• The cleaning process should be carried out before the compressor returns to the distributor.
• The compressor housing can only be electrically heated to speed up this process.
• When removing oil from the system, it should be done safely.
Precautions for using R32 refrigerant
The basic installation work procedures are the same as the conventional refrigerant (R22 or R410A).
However, pay attention to the following points:
WARNING
1. Transport of equipment containing flammable refrigerants.
Attention is drawn to the fact that additional transportation regulations may exist with respect to equipment
containing flammable gas. The maximum number of pieces of equipment or the configuration of the equipment,
permitted to be transported together will be determined by the applicable transport regulations.
2. Marking of equipment using signs
Signs for similar appliances (containing flammable refrigerants) used in a work area generally are addressed by
local regulations and give the minimum requirements for the provision of safety and/or health signs for a work
location. All required signs are to be maintained and employers should ensure that employees receive suitable
and sufficient instruction and training on the meaning of appropriate safety signs and the actions that need to be
taken in connection with these signs.
The effectiveness of signs should not be diminished by too many signs being placed together. Any pictograms
used should be as simple as possible and contain only essential details.
3. Disposal of equipment using flammable refrigerants
Compliance with national regulations
4. Storage of equipment/appliances
The storage of equipment should be in accordance with the manufacturer's instructions.
5. Storage of packed (unsold) equipment
•Storage package protection should be constructed such that mechanical damage to the equipment inside the
package will not cause a leak of the refrigerant charge.
•The maximum number of pieces of equipment permitted to be stored together will be determined by local
regulations.
6. Information on servicing
6-1 Checks to the area
Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure
that the risk of ignition is minimized. For repair to the refrigerating system, the following precautions should be
complied with prior to conducting work on the system.
6-2 Work procedure
Work shall be undertaken under a controlled procedure so as to minimize the risk of flammable gas or vapour
being present while the work is being performed.
6-3 General work area
• All maintenance staff and others working in the local area shall be instructed on the nature of work being carried
out. 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.
6-4 Checking for presence of refrigerant
• The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the
technician is aware of potentially flammable atmospheres.
• Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants, i.e. non-
sparking, adequately sealed or intrinsically safe.
6-5 Presence of fire extinguisher
• If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire
extinguishing equipment shall be available to hand.
• Have a dry powder or CO fire extinguisher adjacent to the charging area.
2
6-6 No ignition sources
• No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that
contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may
lead to the risk of fire or explosion.
• All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of
installation, repairing, removing and disposal, during which flammable refrigerant can possibly be released to the
surrounding space.
• the area around the equipment is to be surveyed to make sure that there are noPrior to work taking place,
flammable hazards or ignition risks. “No Smoking” signs shall be displayed.
6-7 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
air.
Safety Precautions
10
6-8 Checks to the refrigeration equipment
• Where 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 using flammable refrigerants:
–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;
Marking to 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 of
materials which are inherently resistant to being corroded or are suitably protected against being so corroded.
6-9 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:
(1) That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
(2) That there no live electrical components and wiring are exposed while charging, recovering or purging the
system;
(3) That there is continuity of earth bonding.
7. Repairs to sealed components
• During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being
worked upon 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.
• Particular attention shall be paid to the following to ensure that by working on electrical components, the casing
is not altered in such a way that the level of protection is affected.
• This shall include damage to cables, excessive number of connections, terminals not made to original
specification, damage to seals, incorrect fitting of glands, etc.
• Ensure that apparatus is mounted securely.
• Ensure that seals or sealing materials have not degraded such 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.
NOTE: The use of silicon sealants may inhibit the effectiveness of some types of leak detection equipment.
Intrinsically safe components do not have to be isolated prior to working on them.
8. 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. The test apparatus shall be at the correct rating.
• Replace components only with parts specified by the manufacturer.
• Other parts may result in the ignition of refrigerant in the atmosphere from a leak.
9. 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.
WARNING
–
6-8 Checks to the refrigeration equipment
• Where 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 using flammable refrigerants:
–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;
Marking to 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 of
materials which are inherently resistant to being corroded or are suitably protected against being so corroded.
6-9 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:
(1) That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking;
(2) That there no live electrical components and wiring are exposed while charging, recovering or purging the
system;
(3) That there is continuity of earth bonding.
7. Repairs to sealed components
• During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being
worked upon 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.
• Particular attention shall be paid to the following to ensure that by working on electrical components, the casing
is not altered in such a way that the level of protection is affected.
• This shall include damage to cables, excessive number of connections, terminals not made to original
specification, damage to seals, incorrect fitting of glands, etc.
• Ensure that apparatus is mounted securely.
• Ensure that seals or sealing materials have not degraded such 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.
NOTE: The use of silicon sealants may inhibit the effectiveness of some types of leak detection equipment.
Intrinsically safe components do not have to be isolated prior to working on them.
8. 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. The test apparatus shall be at the correct rating.
• Replace components only with parts specified by the manufacturer.
• Other parts may result in the ignition of refrigerant in the atmosphere from a leak.
9. 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.
Safety Precautions
11
WARNING
10. 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.
11. Leak detection methods
The following leak detection methods are deemed acceptable for systems containing flammable refrigerants:
• Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may not be
adequate, or may need re-calibration. (Detection equipment shall be calibrated in a refrigerant-free area.)
• Ensure that the 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 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.
• If a leak is suspected, all naked flames shall be removed/ extinguished.
• If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the
system, or isolated (by means of shut off valves) in a part of the system remote from the leak.
• Oxygen free nitrogen (OFN) shall then be purged through the system both before and during the brazing
process.
12. Removal and evacuation
• When breaking into the refrigerant circuit to make repairs – or for any other purpose
–conventional procedures shall be used.
• However, it is important that best practice is followed since flammability is a consideration.
• The following procedure shall be adhered to:
Remove refrigerant;
Purge the circuit with inert gas;
Evacuate;
Purge again with inert gas;
Open the circuit by cutting or brazing.
• The refrigerant charge shall be recovered into the correct recovery cylinders.
• The system shall be “flushed” with to render the unit safe.OFN
• This process may need to be repeated several times.
• Compressed air or oxygen shall not be used for this task.
• 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.
• This operation is absolutely vital if brazing operations on the pipe-work are to take place.
• Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is ventilation available.
13. Charging procedures
• In addition to conventional charging procedures, the following requirements shall be followed:
- Ensure that contamination of different refrigerants does not occur when using charging equipment.
- Hoses or lines shall be as short as possible to minimize 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 already).
- Extreme care shall be taken not to overfill the refrigeration system.
- Prior to recharging the system it shall be pressure tested with OFN.
• The system shall be tested for leak on completion of charging but prior to commissioning.
• shall be carried out before leaving the site.A follow up leak test
14. Decommissioning
Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment
and all its details.
It is recommended good practice that all refrigerants are recovered safely.
Safety Precautions
12
WARNING
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. It is essential that electrical power is available before the task is commenced.
a) Become familiar with the equipment and its operation.
b) Isolate system electrically.
c) Before attempting the procedure ensure that:
• Mechanical handling equipment is available, if required, for handling refrigerant cylinders;
• 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.
d) Pump down refrigerant system, if possible.
e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the
system.
f) Make sure that cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate in accordance with manufacturer's instructions.
h) Do not overfill cylinders. (No more than 80 % volume liquid charge).
I) Do not exceed the maximum working pressure of the cylinder, even temporarily.
j) 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.
k) Recovered refrigerant shall not be charged into another refrigeration system unless it has
been cleaned and checked.
15. Labelling
Equipment shall be labelled stating that it has been de-commissioned 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.
16. Recovery
• When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good
practice that all refrigerants are removed safely.
• 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 is 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 flammable refrigerants.
• In addition, 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.
• Consult manufacturer if in doubt.
• 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.
• When oil is drained from a system, it shall be carried out safely.
Safety Precautions
13
Explanation of symbols displayed on the indoor unit or outdoor unit.
WARNING
This symbol shows that this appliance uses a flammable refrigerant.
If the refrigerant is leaked and exposed to an external ignition source,
there is a risk of fire.
CAUTION
This symbol shows that the operation manual should be read
carefully.
CAUTION
This symbol shows that a service personnel should handle this
equipment with reference to the installation manual.
CAUTION
This symbol shows that information is available such as the operating
manual or installation manual.
• Appliance shall be installed, operated and stored in a room with a floor area larger than X (X see below).
• The installation of pipe-work shall be kept to a room with a floor area larger than X (X see below).
• The pipe-work shall be complianced with national gas regulations.
• When moving or relocating the air conditioner, consult experienced service technicians for disconnection and
reinstallation of the unit.
• Do not place any other electrical products or household belongings under indoor unit or outdoor unit.
Condensation dripping from the unit might get them wet, and may cause damage or malfunction of your property.
• Do not use means to accelerate the defrosting process or to clean, other than those recommended by the
manufacturer.
• The appliance shall be stored in a room without continuously operating ignition sources (for example:
open flames, an operating gas appliance or an operating electric heater).
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odor.
• To keep ventilation openings clear of obstruction.
• The appliance shall be stored in a well-ventilated area where the room size meets requirements as specified for
operation.
• The appliance shall be stored in a room without continuously operating open flames (for example an operating
gas appliance) and ignition sources (for example an operating electric heater).
• Any person involved with a refrigerant circuit should hold a valid certificate from an industry-accredited
assessment authority, which authorizes their competence to handle refrigerants safely in accordance with
required specification.
• Service shall only be performed as recommended by the equipment manufacturer.
• Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the
supervision of the person competent in the use of flammable refrigerants.
• The appliance shall be installed and stored so as to prevent mechanical damage.
• 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.
• The installation of pipe-work shall be kept to a minimum.
• Mechanical connections shall be accessible for maintenance purposes.
2
Required minimum room area X (m )
WARNING
Model
Installation height (m)
0.6
1.0
1.8
2.2
18K
10.38
3.74
1.15
0.77
25K
49.05
17.65
5.45
3.65
30K
53.24
19.15
5.92
3.97
36K
76.71
27.61
8.52
5.71
42K/48K/55K
114.5
41.2
12.7
8.5
Safety Precautions
14
Caution Statements
: The symbol refers to a hazard which can result in severe personal injury or death.
: The symbol refers to a hazard or an unsafe practice which may result in severe personal injury
or death.
: The symbol refers to a hazard or an unsafe practice which may result in personal injury,
product or property damage.
: It refers to the remarks and instruction to the operation, maintenance, and service.
DANGER
WARNING
CAUTION
NOTE
Alert Symbols ：
You must not carry on any transformation to this product, otherwise, it may possibly
cause such consequences as water leakage, breakdown, short-circuit, electric
shock, fire, etc.
Work such as tube line welding, etc. should be carried out far away from the
flammable explosive material vessels, including the air conditioner refrigerant, to
guarantee the security of the site.
To protect the air conditioner from heavy corrosion, avoid installing the outdoor unit
where salty seawater can splash directly onto it or in sulphurous air near a spa. Do
not install the air conditioner where excessively high heat-generating objects are
placed.
DANGER
WARNING
If the supply cord is damaged, it must be replaced by the factory or its service department
in case of danger.
The place where this product is installed must have the reliable electrical earth facility
and the equipment. Please do not connect the grounding of this product to various kinds
of air-feeding tube lines, the drain lines, the lightning protection facility as well as other
tube lines to avoid receiving an electric shock and damages caused by other factors.
Wiring must be done by a qualified electrician. All the wiring must comply with the local
electrical codes.
Monitor the capacity of the electric current with your electrical kilowatt-hour meter wires
and socket before installation.
The power wire where this product is installed must have the independent leakage
protective device and the electric current over-load protection device which are
provided for this product. If not, it will cause an electric shock or a 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.
Means for disconnection, which can provide full disconnection in all poles, must be
incorporated in the fixed wiring in accordance with the wiring rules .
15
This air conditioner must be installed properly by qualified personnel in accordance with the installation
instructions provided with the unit. The appliance shall be installed in accordance with national wiring
regulations.
Before installation, check if the voltage of the power supply at installation site is the same as the voltage
shown on the nameplate.
Caution Statements
WARNING
●Type and rating of circuit breakers/ELB is detailed in “Installation and Maintenance
part. If the fuses in units blows, please call the service agency to replace it with
a new one. Please do not replace it by yourself, or else it may result in accident, for
example, electric shock.
●The cord of the H07RN-F type or the electrically equivalent type must be used for
power connection and interconnection between outdoor unit and indoor unit.
The size of the cord is detailed in “Installation and Maintenance” part.
●The wiring diagram with a clear indication of the connections and wiring to external
control devices and supply cord is detailed in “Electrical Wiring Diagram” part.
●The method of connection of the appliance to the electrical supply and interconnection
of separate components is detailed in “Installation and Maintenance” part.
●CAUTION: 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 a timer, or connected to a circuit that is regularly switched on and off by the utility.
●It is necessary to allow disconnection of the appliance from the supply after installation.
The disconnection may be achieved by incorporating a switch in the fixed wiring in
accordance with the wiring rules.
●The information of dimensions of the space necessary for correct installation of the
appliance including the minimum permissible distances to adjacent structures is
detailed in “Installation and Maintenance” part.
●The range of external static pressures for ducted appliances is detailed in “Installation
and Maintenance” part.
●Instructions on additional charging of refrigerants are detailed below.
Never use gasoline or other inflammable gas near the air conditioner, which is very
Do not turn the air conditioner on or off from the power main switch. Use the
ON/OFF operation button.
Do not stick anything into the air inlet and air outlet of both the indoor and outdoor
units. This is dangerous because the fan is rotating at a high speed.
Do not cool or heat the room too much if babies or invalids are present.
Read this manual carefully before using this air conditioner.If you still have any difficulties
or problems, consult your dealer for help.
The air conditioner is designed to provide you with comfortable room conditions. Use
this unit only for its intended purpose as described in this instruction manual.
WARNING
CAUTION
dangerous.
When the air conditioner is abnormal, such as burnt smell, appearance deformation,
fire, smoke, etc., it is forbidden to continue to use the air conditioner, and the main
power switch must be cut off immediately and contact the agent.
16
●Storage condition: Temperature -25~60℃
Humidity 30%~80%
●Heating and electric heater function are not available for cooling only models.
●This manual should be considered as a permanent part of the air conditioner equipment and
should be kept with it.
Composition of the Air Conditioner
Indoor unit
Outdoor unit
17
You can control the air conditioner with the wire or wireless remote controller.d
It is used for controlling power ON/OFF, setting the running mode, temperature, fan speed and other functions.
There are different types of remote controllers that can be used.
Operation instructions will be further specified in remote controller's manual.
Please read it carefully before using this appliance and keep it for future reference.
Remote controller
1
1
1
2
3
4
77
2
2
3
5
6
4
4
5
3
5
6
7
6
1. Air inlet
2. Electric box
3. Refrigerant pipe (Liquid)
4. Refrigerant pipe (Gas)
5. Drain pipe (Connect with pump)
6. Drain pipe
7. Air outlet
18K/25K
42K/48K/55K
30K/36K
Operation Manual
Special remarks
•Cooling operation
The fan of the indoor unit will never stop running in cooling operation. It continues to operate even if the
compressor stops working.
•Heating operation
Heating capacity depends on external factors like outdoor unit temperature. Heating capacity might decrease
if outdoor ambient temperature is too low.
•Anti-freezing function during cooling
When the air temperature from the indoor outlet is too low, the unit will run for some time under the fan mode,
to avoid frost or ice forming on the indoor heat exchanger.
•Cold air prevention
Within several minutes after the heating mode is selected, the fan of the indoor unit will not run until the heat
exchanger of the indoor unit reaches a certain temperature to prevent cold draft.
•Defrosting
When the outdoor temperature is too low, ice may form on the outdoor heat exchanger, reducing heating
performance. When this happens, the defrost cycle of the system will start. During the defrost cycle, the indoor
unit fan stops (or runs at a very low speed in some cases), to prevent cold draft.
Once the defrost cycle is complete, heating operation and the fan speed resume.
•Discharging the residual heating air
When stopping the air conditioner in normal operation, the fan motor will run with low speed for a while to
blow out the residual hot air.
•Auto restart from power outage
When the power supply is recovered after power outage, all presets still be in effect and the system will
run according to the previous settings.
3-minute protection after the compressor stops•
To protect compressor, the system implements a 3 minutes once operation is stopped.
5 minute-protection•
Compressor must run for at least 5 minutes once operation starts. During the 5 minutes, compressor will not
stop even after set point is reached. The system will shut off if manually turned off using the remote controller.
18
Composition of the Air Conditioner
Note: The figures are based on the external views of the standard model.
Consequently, the shape may differ for the air conditioner model you have selected.
Wired controller
HCWA21NEHH HCRB31NEWH
Remote controller
(Optional)
NOTE
There is no heating function in cooling only type
ALARM
(Standard)
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Hitachi RPIL-B18TFTANA User manual
- Category
- Split-system air conditioners
- Type
- User manual
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