Hitachi RCI-1.5UNE1NH Manual

HPM2017008HA
INSTALLATION AND MAINTENANCE MANUAL
Installation and Maintenance Manual
HITACHI SPLIT AIR CONDITIONERS
Models
< Outdoor Units >
< Indoor Units >
RAS-1.5UNESNH1*
RAS-2.0UNESNH1*
RAS-3.0UNESNH1
RAS-4.0UNESNH1
RAS-5.0UNESMH1
RAS-6.0UNESMH1
RAS-6.5UNESMH1
RCI-1.5UNE1NH*
RCI-2.0UNE1NH*
RCI-3.0UNE1NH
RCI-4.0UNE1NH
RCI-5.0UNE1NH
RCI-6.0UNE1NH
RCI-6.5UNE1NH
Heat Pump Type
Heat Pump Type
RCI-1.5TNE1NH*
RCI-2.0TNE1NH*
RCI-3.0TNE1NH*
RCI-4.0TNE1NH*
RCI-5.0TNE1NH*
RCI-6.0TNE1NH*
RCI-6.5TNE1NH*
Cooling Only Type
RAS-1.5TNESNH1*
RAS-2.0TNESNH1*
RAS-3.0TNESNH1*
RAS-4.0TNESNH1*
RAS-5.0TNESMH1*
RAS-6.0TNESMH1*
RAS-6.5TNESMH1*
Cooling Only Type

This manual should be considered as a permanent part of the air conditioning equipment and should remain with
the air conditioning equipment.
The numbers in the model represent the cooling capacity HP. For example,
●
RCI-1.5UNE1NH or RAS-1.5UNESNH1 represent 1.5HP
●We pursue a policy of continuous improvement in design and performance of products. Company reserves
● We cannot anticipate every possible circumstance that might involve a potential hazard.
● This air conditioner is designed for standard air conditioning only. Do not use this air conditioner for
purposes such as drying clothes, refrigerating foods or for any other cooling or heating process.other
● The installer and system specialist shall secure safety against leakage according to local regulations
or standards.
● No part of this manual may be reproduced without written permission.
● Signal words (DANGER, WARNING and CAUTION) are used to identify levels of hazard seriousness.
Definitions for identifying hazard levels are provided below with their respective signal words.
Immediate hazards which WILL result in severe personal injury or
death.
Hazards or unsafe practices which COULD result in severe personal
injury or death.
Hazards or unsafe practices which COULD result in minor personal
injury or product or property damage.
: Useful information for operation and/or
maintenance.
● It is assumed that this air conditioner will be operated and serviced by English speaking people.
If this is not the case, the customer should add safety, caution and operating signs in the native language.
● If you have any questions, contact your dealer.
● This manual gives a common description and information for the air conditioner you operate as well as
for other models.
● This air conditioner has been designed for the following temperatures. Operate it within this range.
● Storage condition: Temperature -25~60℃
Humidity 30%~80%
IMPORTANT NOTICE
Series Mode Outdoor operation temperature range
Maximum(℃) Minimum(℃)
Heat Pump Cooling Operation 48 -15
Heating Operation 24 -15
Cooling Only Cooling Operation 48 -15
the right to vary specifications without prior notice.

●
CHECKING PRODUCT RECEIVED
Upon receiving this product, inspect it for any shipping damage.Claims for damage, either apparent
or concealed, should be filed with the shipping company immediately.
●Check the model number, electrical characteristics (power supply,voltage and frequency) and
accessories to determine if they are correct.
The standard utilization of the unit shall be explained in this manual.
Therefore, the utilization of the unit other than those specified in this manual is not recommended.
Please contact your dealer, as the occasion arises.
We recommend that this air-conditioner is installed properly by qualified in personnel accordance with
the installation instructions provided with the unit.
Before installation, check if the voltage of the power supply at installation site is the same as the voltage
shown on the nameplate.
Do not perform any alterations to this product, otherwise, it may possibly cause water
leakage, breakdown, short-circuit, electric shock, fire, and so on.
Piping and welding work 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 can splash directly onto it or in sulphurous air near a spa. Do salt water not
install the air-conditioner where excessively high heat-generating objects are
placed.
If the supply cord is damaged, it must be replaced by the factory or its service
department danger.to avoid
The place where this product is installed must have reliable electrical earth facility and
protections. Please do not connect the grounding of this product to various kinds of air-
feeding ducts, drain piping, lightning protection facility as well as other piping lines to
avoid 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.
Consider the capacity of the electric current of your electrical meter and socket before
installation.
The power wire where this product is installed independent should have leakage
protective provided for this device and the electric current over-load protection device
product.
This appliance is not intended for use by persons (including children) who lack of
experience and knowledge , unless they of using air-conditioner are supervised by
adults. Children should be supervised to ensure that they do not play with the
appliance.
Means for disconnection to provide disconnection in all poles, must be complete
incorporated in the fixed wiring in accordance with the wiring regulations.
When abnormalities like burnt smell, deformation, fire, smoke, and so on is observed,
using the
stop and so on is observed, stop air conditioner, cut off the main power
supply immediately and contact the dealer.
DANGER
WARNING

Contents
Safety Precautions..............................................................................................................1
Identification of Parts .........................................................................................................3
Before Operation.................................................................................................................5
Diagram of Refrigerant Cycle & Wiring.............................................................................8
1. Refrigerant Flow Diagram .................................................................................................8
2. Electrical Wiring Diagram..................................................................................................8
Installation and Maintenance.............................................................................................9
1. Safety Notice.....................................................................................................................9
2. The Tools and Instruments for Installation ......................................................................10
3. The Installation of the Indoor Unit ..................................................................................10
3.1 The Initial Check .......................................................................................................11
3.2 Installation(1.5HP~2HP) ...........................................................................................13
3.3 Installation(3HP~6.5HP) ...........................................................................................15
3.4 Installation Details for Air Panels ..............................................................................17
4. The Installation of Outdoor Unit ......................................................................................18
4.1 The Initial Check .......................................................................................................18
4.2 Installation.................................................................................................................18
4.3 Refrigerant Length between Indoor and Outdoor .....................................................19
5. Refrigerant Piping ...........................................................................................................20
5.1 The Piping Material...................................................................................................20
5.2 The Piping connection ..............................................................................................20
5.3 Air Exhaust ...............................................................................................................21
6. Drain Piping ....................................................................................................................22
7. Electrical Wiring ..............................................................................................................24
7.1 General Check..........................................................................................................24
7.2 Electrical Wiring Connection.....................................................................................24
8. Test Run..........................................................................................................................25
9. Electrical installation .......................................................................................................26

1
Symbols in this Installation Manual are interpreted as shown below:
Be sure not to do.
The feature of the appliance,
instead of a fault.
Pay attention to such a situation.
Grounding is necessary.
Be sure to follow the instruction.
Do not use the power supply circuit
breaker or pull off the plug to turn it
off during operation. This may cause
a fire due to spark, etc.
Avoid dirt accumulation on power
supply circuit breaker. Connect
the power supply cord to it firmly
and correctly, Otherwise it may
lead to electric shock or a fire
Do not , pull apply excess pressure
or press the power supply cord,
otherwise, the power supply cord can
break leading to electric shock or fire.
Never insert a stick or similar object
to the unit. Since the fan is rotating
at high speed, this may cause an
Do not repair the appliance on your
own, this may lead to electric shock
and so on.
Turn off the appliance first and then
cut off power supply when appliance
It is harmful for your health if you are
exposed to cold air for prolonged
period of time. Hence it is
Prevent the air flow from reaching the
gas burners and stove.
Do not operate the unit with wet
hands.
It is user's responsibility to make the
appliance grounded according to
local codes or ordinances by a
licensed person.
OFF OFF
OFF
ON
ON ON
Warning: Incorrect handling could
cause a serious hazard, such as death,
serious injury, etc.
Provideaccurate power supply
in accordance with the rating
plate requirement. Otherwise,
serious faultsmay occur or a fire
Safety Precautions
break out due to insufficient
contact. may be break out.
injury.
recommended for uniform
distribution of airflow in the room.
malfunctions.

Safety Precautions
2
Features of protector
Inspection
Noise pollution
The protective device will work at
following cases:
Turning off the appliance and restarting it at
once or changing mode during operation,
you need to wait at least 3 minutes.
After operating for a long time , the air
conditioner should be inspected on the
following items:
Overheat of the power supply cord
and plug or even a smell. burnt
Abnormal operating sound or vibration.
Water leakage from indoor unit.
Electrification of metal cabinet.
Stop the air conditioner if above trouble
occurs.
It is advisable to have a detailed inspection
after using the appliance for 5 years even
if none of the above condition occurs.
Install the air conditioner at a place that
can bear its weight to for quiet operation.
Features of HEATING modeFeatures of HEATING mode
Preheating
It is hard to increase the room temperature when outdoor temperature is very low. lt might
take longer time if the working temperature range not closer to the operation limits.
Defrosting
At the beginning of HEATING operation, the airflow from indoor unit is discharged 2-5
minutes later.
During HEATING operation the appliance will defrost automatically to improve
efficiency. This procedure usually lasts for 2-10 minutes. During defrosting, fans stop
operation. After defrosting completes, it returns to "HEATING" mode automatically.
Safety Precautions
Operating condition
The protective device may trip and stop the if it is
operated outside allowed temperature range.
If the air conditioner runs in "COOLING" or
"DRY" mode with door or window open
for a long time when relative humidity is above
85%, dew may drip down from the air outlet.

Indoor unit
outdoor unit
Identification of Parts
3.0~6.5HP
1.5~5.0HP
1.5/2.0HP
6.0/6.5HP
3
Consequently, the shape may differ from that of the air conditioner you have selected.
Note: The figures are based on the external views of a standard model.

Display Panel
56
4
62
1
13
754
2
37
HCWA21NEWH
Wire Controller
Remote Controller
Identification of Parts
Remote Controller (Optional)
You can control the air-conditioner with the wired controller or remote controller.
It is used for power ON/OFF, setting the operation 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.
The figures in this manual are based on the external view of a standard model.
Consequently, the shape may differ you have selected.for the air conditioner model
*It can be set or canceled by professional after-sale staff.
4
1
Run indicator (Red)
It lights on during operation. It lights off during SLEEP mode.
2 Emergency switch
The filter clean indicator is displayed on the screen when this switch is pressed. The unit will stop
operation if you continue to press this button, if pressed for more than 5s, the unit will operate in
3 Timer indicator (Green)
It lights on when timer is in use. It lights off when timer completes.
4 Filter clean (Yellow)
It lights on when the filter should be cleaned.
5 Defrost indicator (Green)
It lights on during defrosting and it lights off when defrosting is complete.
6 Buzzer
It rings when the signal from remote controller is received.
7 Infrared receiver
Receives signal from the remote controller.
cooling mode.
Remote Controller
HCRA31NEWH

5
Before Operation
●
Supply electrical power to system for approximately 12 hours before start-up after long time shutdown.
●Do not start the system immediately after power supply, it may cause a compressor failure, because the
compressor is not heated well.
●Make sure that the outdoor unit is not covered with snow or ice. If covered, remove it by using hot water
(approximately 50℃).If the water temperature is more than 50℃, it will damage the plastic parts.
●When the system is started after a long time shutdown of more than 3 months, it is recommended that the
system be checked by your service dealer.
●Turn OFF the main switch when the system is stopped for a long period of time. If the main switch is not
turned OFF, electricity is consumed because the oil heater is always energized during compressor stopping.
Heating capacity depends on external factors like outdoor unit temperature. Heating capacity might decrease if outdoor ambient
temperature is too low.
●
Cold air prevention
In several minutes after the heating mode is started, 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.
●
When the outdoor temperature is too low, frost or ice may form on the outdoor heat exchanger, reducing
heating performance. When this happens, a defrosting system of the air conditioner will operate. At the same time the fan
in the indoor unit stops (or runs at a very low speed in some cases), to prevent cold draft. After defrosting is over, the heating
operation and fan speed restarts.
●
●
1. Special Remarks
●
To protect compressor, it will be continue to be off for at least 3 minutes once it has stopped.
● 5 minutes protection
Compressor must run running. In this 5 minutes, compressor will not stop even if the roomat least for 5 minutes once it starts
temperature reaches the setting temperature point unless you use remote controller to turn off the unit (all indoor unit can be
turned off by user).
● Cooling operation
The fan of the indoor unit will never stop running during the cooling operation. It remains running even if the compressor stops
working.
Anti-freezing function during cooling
When the temperature of the air from the indoor outlet is too low, the unit will run for some time under the fan mode, to avoid
frost or ice forming in the indoor heat exchanger.
Defrosting
Blowing out the residual heating air
Auto restart from Power Break
When the power supply is recovered after power break, all presets are still effective and the air-conditioner will run according to
the previous setting.
For more details, please refer to the Manual of Remote Controller.
2. Setting of Automatic Swing Louver
Do not adjust the air louver by hand, to avoid damage to the louver mechanism.
Before Operation
● Heating operation
●
When normal operation, the fan motor would run with low speed for a while to blow out air conditioner is stopped during residual
3 minutes protection after compressor stop
heating air.

3. Filter Cleaning
Do not operates the system without air filter to protect the indoor unit heat exchanger against being
clogged.
Turn OFF the main power switch before taking filter. (The previous operation mode may appear.)
3.1 Setting the Cleaning Period of Filter
Step 1
Enter choose and set mode
It is time to clean the filter, when the filter icon ( add filter icon) turns on.
Step 2
Cancel the setting
Press Emergency switch to return to the standard state.
3.2 Take Out the Filter
Take out the air filter according to the following steps.
Step 1
Open the air inlet grille after pushing the two knobs as shown by the arrow mark.
Step 2
Take out the air filter from the air inlet grille by supporting the air grille and lifting the air filter after detaching
the filter from the hinges.
Filter
Emergency
switch
6