NEC Air Conditioner RIH 6867 User Manual

Inverter Split (room) air conditioner  
RIH-6867  
User Manual  
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Preparation before use  
Before using the air conditioner, be sure to check and preset the following.  
Remote Controller presetting  
The remote controller is NOT presetting correctly for cooling and reverse cycle.  
Each time after replacing the batteries in the remote controller, the Cooling indicator  
and  
Heating indicator  
will flashes alternately on LCD of the remote controller.  
User can preset the remote controller type depending on the air conditioner type you have purchased  
as follows:  
Press any button when  
Press any button when  
flashes, Heat Pump is set.  
flashes, Cooling Only is set.  
If you don't press any button within 12 seconds, the remote controller is preset to Heat Pump automatically.  
Note:  
If the air conditioner you purchased is a Cooling Only one, but you preset the remote controller as Heat Pump, it will not  
operate. But if the air conditioner you purchased is a Heat Pump one, and you preset the remote controller as Cooling Only,  
then you CAN NOT preset the Heating operation with the remote controller.  
Auto Restart Presetting  
If you want auto restart function, hold down the Emergencybutton (ON/OFF) on the indoor unit for over 5  
seconds, auto restart function is set with a buzz sound, air conditioner is on standby.  
If auto restart has been set, hold down the Emergency button (ON/OFF) on the indoor unit for over 5  
seconds, auto restart function is canceled with buzz sound, air conditioner is on standby.  
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Safety precautions  
Symbols in this User Manual are interpreted as shown below.  
Be sure not to do.  
Grounding is essential.  
Warning: Incorrect handling could  
cause a serious hazard, such as death,  
serious injury, etc.  
Pay attention to such a situation.  
ON  
Use correct power supply in  
accordance with the rating plate  
requirement. Otherwise, serious  
faults or hazard may occur or a  
fire maybe break out.  
OFF  
Do not use the power supply circuit  
breaker or pull off the plug to turn it off  
during operation. This may cause a fire  
Prevent the air flow from reaching the gas  
burners and stove.  
due to spark, etc.  
Never insert a stick or similar obstacle  
to the unit. Since the fan rotates at high  
speed, this may cause an injury.  
Do not touch the operation buttons  
when your hands are wet.  
Do not put any objects on the outdoor  
unit.  
Do not repair the appliance by yourself.  
If this is done incorrectly, it may cause an  
electric shock, etc.  
Turn off the appliance by remote control  
firstly before cutting off power supply if  
malfunction occurs.  
2
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Identification of parts  
Indoor unit  
Air Intake  
Front Panel  
Display Panel  
Emergency Panel  
Air Outlet  
Vertical Adjustment  
Louver  
Horizontal Adjustment  
Louver  
Air Filter  
Remote Controller  
Air Intake  
Outdoor unit  
Pipes and Power  
Connection Cord  
Drain Hose  
Note: Condensate water drains  
at COOLING or DRY operation.  
Air Outlet  
The figures in this manual are based on the external view of a standard model.  
Consequently, the shape may differ from that of the air conditioner you have selected.  
Note: The pipes and power connection cord will be provided or purchased by customer.  
3
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Identification of parts  
UH series operating and Display  
Timer Indicator  
Run Indicator  
It is on during operation.  
It flashes during  
defrosting.  
It lights up during the  
set time.  
Tim er  
Comp.  
Run  
Slee p  
Sleep Indicator  
Compressor indicator  
Temperature display  
It lights up when  
unit is in sleep mode.  
Display actual room  
temperarure.  
Display set temperature.  
It lights up when  
compressor is running.  
.
The shape and position of the switches and indicators may vary from different models, but their function are similar.  
4
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Remote controller  
Remote controller  
The remote controller transmits signals to the system.  
ON/OFF BUTTON  
1
        
         
       
MODE BUTTON  
2
3
       
FAN BUTTON  
        
      
ROOM TEMPERATURE  
SETTING BUTTONS  
       
4
        
4
SWING BUTTON  
5
6
S UP ER  
S MAR T  
        
        
   
9
6
2
5
SMART BUTTON  
        
         
3
8
7
1
  
TIMER SET/CANCEL BUTTON  
7
8
         
SLEEP BUTTON  
         
SUPER BUTTON  
9
         
         
       
Indication symbols on LCD:  
   
   
   
    
     
       
See page 9 "Smart Mode"  
for details)  
   
   
    
    
    
   
    
    
   
    
Note: Ea ch mo de and relevant function will be furthe r spec ified in following pa ges.  
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Remote controller  
Remote controller  
How to Insert the Batteries  
Remove the battery cover according to the arrow direction.  
Insert new batteries making sure that the (+) and (-) of  
battery are matched correctly.  
Reattach the cover by sliding it back into position.  
Note:  
Use 2 LR03 AAA(1.5volt) batteries. Do not use rechargeable batteries.  
Replace batteries with new ones of the same type when the display  
becomes dim or effective responce.  
If the replacement is done within 1 minute, the remote controller  
will keep original presetting. However, if you want to change the  
presetting from Heat Pump to Cool Only or Cool Only to Heat Pump,  
you should reload batteries 3 minutes after removing the old ones.  
(Please refer to page 1 for details.)  
Storage and Tips for Using the Remote Controller  
The remote controller may be stored mounted on a wall with a holder.  
Note: The remote controller holder is an optional part.  
Remote controller holder  
How to Use  
To operate the room air conditioner, aim  
the remote controller to the signal receptor.  
The remote controller will operate the air  
conditioner at a distance of up to 7m when  
pointing at signal receptor of indoor unit.  
Signal receptor  
Choose Cooling Only Remote controller or Heat Pump  
Please refer to page 1 " Preparation before use" for details.  
Back-light Function (optional)  
Please refer to page 1 "Preparation before use" for details.  
6
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Operation instructions  
Operation modes  
Selecting mode  
Each time MODE button is pressed, the operation mode  
is changed in sequence:  
COOLING  
DRY  
FAN ONLY  
HEATING  
Heating mode is NOT available for cooling only air conditioner.  
FAN mode  
Each time the "FAN" button is pressed, the fan speed is  
changed in sequence:  
High  
Medium  
Auto  
Low  
At "FAN ONLY" mode, only "High","Medium" and "Low" are available.  
At "DRY" mode, airflow is set at "Low" automatically, "FAN" button  
is ineffective in this case.  
Setting temperature  
SUPER  
SMART  
Press once to raise temperature setting by 1  
Press once to lower temperature setting by 1℃  
1
3
Range of available set temperature  
SLEEP  
2
*HEATING, COOLING  
DRY  
18 ~32  
room temperature  
2
+
-
unable to set  
ONLY  
FAN  
*Note: Heating mode is NOT available for cooling only models.  
4
Turning on  
Press  
button, when the appliance receives the  
signal, the RUN indicator of the indoor unit lights up.  
SWING, SMART, TIMER, SLEEP and SUPER operation modes will be specified in the following pages.  
Changing modes during operation, sometimes the unit does not response at once. Wait 3 minutes.  
During heating operation, air flow is not discharged at the beginning. After 25 minutes, the air flow will be discharged  
until temperature of indoor heat exchanger rises.  
Wait 3 minutes before restarting the appliance.  
7
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Operation instructions  
Airflow direction control  
Airflow direction control  
Vertical airflow is automatically adjusted to a certain angle  
in accordance with the operation mode after turning on the unit.  
The direction of airflow can be  
Operation mode Direction of airflow  
also adjusted to your own  
requirement by pressing the  
"SWING" button of the  
remote controller.  
SUPER  
SMART  
5
horizontal  
downward  
COOLING, DRY  
*HEATING,  
FAN ONLY  
5
SLEEP  
*Heating mode is only available for heat pump models.  
Vertical airflow control (with the remote controller)  
Using remote controller to set various angles of flow or specific angle  
as you like.  
Swinging airflow  
Pressing "SWING" button once, the vertical adjustment  
louver will swing up and down automatically.  
Desired direction airflow  
Pressing the "SWING" button again when the louvers swing  
to a suitable angle as desired.  
Horizontal airflow control (with hands)  
Turning the control rods of the  
horizontal adjustment louvers to  
change horizontal air flow as shown.  
Note: The shape of the unit may look different  
from that of the air conditioner you have selected.  
control rods of horizontal  
adjustment louvers  
Do not turn the vertical adjustment louvers manually, otherwise malfunction may occur. If that happens, turn off the unit  
first and cut off the power supply, then restore power supply again.  
It is better not to let the vertical adjustment louver tilt downward for a long time at COOLING or DRY mode to prevent  
condensed water from dripping.  
8
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Operation instructions  
SMART mode  
Press the SMART button, the unit enters smart mode(fuzzy logic operation) directly regardless of  
the unit is on or off. In this mode, temperature and fan speed are automatically set based on the  
actual room temperature.  
Operation mode and temperature are determined by indoor temperature  
Heat pump models  
Target temperature  
Operation mode  
HEATING  
DRY  
Indoor temperature  
21or below  
21-26℃  
22℃  
Room temperature  
decrease 1.5after  
operate for 3 minutes  
COOLING  
Over 26℃  
26℃  
Cooling only models  
Indoor temperature  
SM ART  
SU P ER  
Operation mode  
Target temperature  
Room temperature  
decrease 1.5after  
operate for 3 minutes  
DRY  
26or below  
SLEEP  
Over 26℃  
COOLING  
26℃  
SMART button is ineffective in SUPER mode.  
Note: Temperature, airflow and direction are controlled automatically in SMART mode.  
However, a decrease or rise of up to 2 can be set with the remote controller if you still  
feel uncomfortable.  
A decrease or increase up to 2can be set in SMART mode  
Your feeling  
button  
adjustment procedure  
High  
Low  
High  
Press once to lower the  
Slightly warmer  
set temp by 1  
A decrease up  
to 2can be set  
Press twice to lower the  
set temp by 2  
Low  
High  
Low  
High  
Press once to raise the  
set temp by 1  
Slightly cooler  
A rise up to  
2can be set  
Press twice to raise the  
set temp by 2.  
Low  
Uncomfortable  
because of  
unsuitable air  
Indoor fan speed alternates among  
High, Medium and Low each time this  
button is pressed.  
flow volume.  
Press it once, the vertical adjustment  
louver swings to change vertical airflow  
direction. Press it again, swings stops.  
For horizontal airflow direction, please  
refer to the previous page for details.  
Uncomfortable  
because of  
unsuitable flow  
direction.  
9
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Operation instructions  
Timer mode  
It is convenient to set the timer on with TIMER button when you go out in the morning  
to achieve a comfortable room temperature at the time you get home. You can also set  
timer off at night to enjoy a good sleep.  
Timer-setting  
Setting a switch-on  
timer when the  
appliance is off.  
Setting a switch-off timer  
during operation.  
SU PER  
SM AR T  
2
As time goes by, LCD on remote controller only displays the remained time instead of  
set temperature.  
2
SLEEP  
The previous set time is stored and the next set time begins with the previous setting.  
On- timer and off-timer can not be set at the same time.  
1
The room may not reach your desired temperature within the preset time because of  
different size of room.  
Example: set an operation after 9.5 hours  
Set desired operating mode, temperature setting and indoor fan speed firstly,  
then press the TIMER button and "h" flashes on LCD.  
1
Point the remote control at the signal receptor of the indoor unit,  
press the or button when "h" flashes. Choose the timer you want ,  
then press the TIMER button.  
A "beep" can be heard.  
2
3
Timer indicator on the indoor unit lights up.  
"h" stops flashing.  
Press the TIMER button, "h" flashes on the LCD, then you can set the time.  
Each time the or button is pressed,  
If the desired time is within 10 hours, the set time increases or decreases by 0.5 hour;  
If desired time is beyond 10 hours, increases or decreases by 1 hour.  
The range can be set is 0.5 hour to 24 hours.  
To cancel the set timer: press the TIMER button again, a "beep" can be heard  
and the timer indicator on the indoor unit swithes off.  
10  
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Operation instructions  
SLEEP mode  
SLEEP mode  
SLEEP mode can be set in COOLING or HEATING operation mode.  
This function gives you a more comfortable environment for sleeping.  
In SLEEP mode,  
The appliance will stop operation automatically after operating for 8 hours.  
Fan speed is automatically set at low speed.  
*Set temperature will rise by 1at most if the appliance operates in cooling  
mode for 2 hours constantly, then keeps steady.  
Set temperature will decrease by 3at most if the appliance operates in  
SU PE R  
SM ART  
heating mode for 3 hours constantly, then keeps steady.  
*Note: In cooling mode, if room temperature is 26or above, set temperature  
will not change.  
Note: Heating is NOT available for cooling only air conditioner.  
SLEEP  
SUPER mode  
SUPER mode  
SUPER mode is used to start or stop fast cooling.  
Fast cooling operates at high fan speed, changing the set temperature  
automatically to 18 .  
SUPER mode can be set when the appliance is in operation or energized.  
In SUPER mode, you can set airflow direction or timer. If you want to  
escape from SUPER mode, press any -SUPER, MODE, FAN, ON/OFF  
or TEMPERATURE SETTING button, the display will return to the original  
PER  
SMART  
1
mode.  
Note:  
SLEEP and SMART buttons are not available in SUPER mode.  
SUPER button is ineffective in HEATING mode.  
SLEEP  
The Appliance will continue working in SUPER mode with set temperature of 18, if  
you don't escape from it by pressing any of the buttons mentioned above.  
.
11  
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Maintenance  
Front panel maintenance  
Air filter maintenance  
Cut off the power supply  
It is necessary to clean the air filter  
after using it for about 100 hours.  
Turn off the appliance  
first before disconnecting  
from power supply.  
Clean it as follows:  
a
Stop the appliance and remove  
the air filter.  
Grasp position "a" and  
pull outward to remove the  
front panel.  
a
1
2
3
Wipe with a soft  
and dry cloth.  
1.Open the front panel.  
2.Press the handle of the filter gently  
from the front.  
3. Grasp the handle and slide out the filter.  
Use a dry and  
Use lukewarm water  
(below 40) to clean  
if the appliance  
is very dirty.  
soft cloth to  
clean it.  
Never use volatile substance  
such as gasoline or polishing  
powder to clean the appliance.  
Clean and reinstall the air filter.  
If the dirt is conspicuous,  
wash it with a solution of  
detergent in lukewarm water.  
After cleaning, dry well in  
shade.  
Never sprinkle water onto the  
indoor unit  
Close the front panel again.  
Reinstall and shut the front panel.  
Clean the air filter every two weeks  
if the air conditioner operates in an  
extremely dusty environment.  
Reinstall and shut the front panel by  
pressing position "b" downward.  
b
b
12  
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Protection  
Noise pollution  
Operating condition  
The protective device maybe trip and stop  
the appliance in the cases listed below.  
Install the air conditioner at a place that  
can bear its weight in order to operate  
more quietly.  
Outdoor air temperature is over 24oc  
Outdoor air temperature is below -7oc  
Install the outdoor unit at a place where  
the air discharged and the operation noise  
would not annoy your neighbors.  
HEATING  
Room temperature is over 27oc  
Outdoor air temperature is over *50oc  
COOLING  
Room temperature is below 21oc  
Do not place any obstacles in front of the  
air outlet of the outdoor unit lest it increases  
the noise level.  
Room temperature is below 18oc  
DRY  
*For Tropical (T3) Climate condition models, the  
temperature point is 52instead of 43.  
If the air conditioner runs in COOLING or DRY mode with  
door or window opened for a long time when relative  
humidity is above 80%,dew may drip down from the outlet.  
Features of protector  
The protective device will work at following cases.  
Restarting the unit at once after operation stops or changing mode during operation, you need to  
wait 3 minutes.  
Connect to power supply and turn on the unit at once, it may start 20 seconds later.  
If all operation has stopped, press ON/OFFbutton again to restart, Timer should be set again  
if it has been canceled.  
Features of HEATING mode  
Preheat  
At the beginning of HEATING operation, the airflow from indoor unit is discharged 2-5  
minutes later.  
Defrost  
In HEATING operation the appliance will defrost (de-ice) automatically to raise efficiency.  
This procedure usually lasts 2-10 minutes. During defrosting, fans stop operation.  
After defrosting completes, it returns to HEATING mode automatically.  
Note: Heating is NOT available for cooling only air conditioner models.  
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Troubleshooting  
The following cases may not always be a malfunction, please check it before asking for service.  
Trouble  
Analysis  
If the protector trip or fuse is blown.  
Please wait for 3 minutes and start again,  
protector device may be preventing unit to work.  
Does not run  
.
If batteries in the remote controller exhausted.  
If the plug is not properly plugged.  
Is the air filter dirty?  
Are the intakes and outlets of the air  
conditioner blocked?  
No cooling or  
heating air  
Is the temperature set properly?  
If strong interference(from excessive static  
electricity discharge, power supply voltage  
abnormality)presents, operation will be  
Ineffective control  
abnormal. At this time, disconnect from the  
power supply and connect back 2-3 seconds later.  
Does not operate  
immediately  
Changing mode during operation, 3 minutes  
will delay.  
It is not  
working  
This odour may come from another source  
such as furniture, cigarette etc, which is  
sucked in the unit and blows out with the air.  
Peculiar odour  
Caused by the flow of refrigerant in the  
air conditioner, not a trouble.  
A sound of  
flowing water  
Defrosting sound in heating mode.  
The sound may be generated by the expansion  
or contraction of the front panel due to change  
of temperature.  
Cracking sound is  
heard  
Mist appears when the room air becomes  
very cold because of cool air discharged  
from indoor unit during COOLING or DRY  
operation mode.  
Spray mist from  
the outlet  
The unit is shifting from heating mode to defrost.  
The indicator will lights off within ten minutes and  
returns to heating mode.  
The compressor indicator(red) lights on constantly,  
and indoor fan stops.  
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Installation instructions  
Installation diagram  
Distance from ceiling  
should be over 50 mm  
Distance from wall  
should be over 50mm  
Distance from the wall  
should be over 50mm  
Distance from floor  
should be over 2000mm  
Air intake distance from the wall  
should be over 250mm  
Air intake distance from  
the wall should be  
over 250mm  
over 250mm  
Above figure is only a simple presentation  
of the unit, it may not match the external  
appearance of the unit you purchased.  
Installation must be performed in accordance with  
the national wiring standards by authorized personnel only.  
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Installation instructions  
Location for Installing Indoor Unit  
Where there is no obstacle near the air outlet and air can be  
easily blown to every corner.  
Indoor unit  
Where piping and wall hole can be easily arranged.  
Keep the required space from the unit to the ceiling and wall  
according to the installation diagram on previous page.  
Where the air filter can be easily removed.  
Keep the unit and remote controller 1m or more apart from  
television, radio etc.  
Pipe length is  
15 meters Max.  
To prevent the effects of a fluorescent lamps, keep as far as  
possible.  
Outdoor unit  
Do not put anything near the air inlet to obstruct it from air  
absorption.  
Where there is strong enough to bear the weight  
and is not tend to increase operation noise and vibration.  
Location for Installing Outdoor Unit  
Outdoor unit  
Where it is convenient to install and well ventilated.  
Avoid installing it where flammable gas could leak.  
Keep the required distance apart from the wall.  
Pipe length is  
15 meters Max.  
The distance between Indoor and outdoor unit should  
be 5 meters and can go up to maximum 15 meters  
with additional refrigerant charge.  
Keep the outdoor unit away from a place of greasy dirt,  
vulcanization gas exit.  
Avoid installing it at the roadside where there is a risk of  
muddy water.  
A fixed base where is not subject to increasing operation  
noise.  
Where there is not any blockage for air outlet.  
Indoor unit  
Max. Allowable Tubing  
Length at Shipment (m)  
Limit of Tubing  
Length (m)  
Limit of Elevation  
Difference H (m) additional refrigerant (g/m)  
Required amount of  
Model  
24K  
5
15  
5
20  
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Installation instructions  
Indoor unit installation  
1. Installing the Mounting Plate  
Decide an installing location for the mounting plate according to the indoor unit location and piping direction.  
Keep the mounting. plate horizontally with a horizontal ruler or dropping line.  
Drill holes of 32mm in depth on the wall for fixing the plate.  
Insert the plastic plugs to the hole, fix the mounting plate with tapping screws.  
Inspect if the mounting plate is well fixed. Then drill a hole for piping.  
Line drops from here  
Hook the line here  
Mounting plate  
Dropping line  
holes for fixing  
Note: The shape of your mounting plate may be different from the one above, but installation method is similar.  
2. Drill a Hole for Piping  
Wall hole sleeve  
Decide the position of hole for piping according to the  
( hard polythene tube  
location of mounting plate.  
prepared by user)  
Drill a hole on the wall. The hole should tilt a little  
downward toward outside.  
5mm  
(tilt downward)  
Install a sleeve through the wall hole to keep the wall  
tidy and clean.  
3. Indoor Unit Piping Installation  
Put the piping (liquid and gas pipe) and cables through the wall hole from outside or put them through  
from inside after indoor piping and cables connection complete so as to connect to outdoor unit.  
Decide whether saw the unloading piece off in accordance with the piping direction.(as shown below)  
Piping direction  
trough  
Unloading  
piece  
4
1
3
Note: When installing the pipe at the directions  
1,2 or 4, saw the corresponding unloading piece  
off the indoor unit base.  
Saw the unloading piece  
off along the trough  
2
After connecting piping as required, install the drain hose. Then connect the power cords. After connecting,  
wrap the piping, cords and drain hose together with thermal insulation materials.  
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Installation instructions  
Piping Joints Thermal Insulation:  
Wrap the piping joints with thermal  
insulation materials and then wrap  
with a vinyl tape.  
wrapped with vinyl type  
Thermal insulation  
Piping Thermal Insulation:  
Large pipe  
Thermal insulation  
a. Place the drain hose under the piping.  
tube  
b. Insulation material uses polythene foam over 6mm in thickness.  
Power connecting cord  
Note: Drain hose is prepared by user.  
Small  
pipe  
Drain pipe should point downward for easy drain flow.  
Do not arrange the drain pipe twisted, sticking out or wave  
around, do not immerse the end of it in water.  
If an extension drain hose is connected to the drain pipe, make  
sure to thermal insulated when passing along the indoor unit.  
Drain hose  
(prepared by user)  
When the piping is directed to the right, piping, power  
Cord and drain pipe should be thermal insulated and  
fixed onto the back of the unit with a piping fixer.  
Insert here  
large  
pipe  
large  
pipe  
drain  
hose  
drain  
small  
small  
pipe  
hose  
pipe  
Hook here  
Base  
Piping fixer  
Base  
Piping fixer  
Base  
A. Insert the pipe fixer to the slot.  
B. Press to hook the pipe fixer onto the base.  
Piping Connection:  
a. Connect indoor unit pipes with two wrenches. Pay special attention  
to the allowed torque as shown below to prevent the pipes, connectors  
and flare nuts from being deformed and damaged.  
b. Pre-tighten them with fingers at first, then use the wrenches.  
Min.thickness  
Model  
24K  
24K  
Pipe size  
Liquid Side (3/8 inch)  
Gas Side (5/8 inch)  
Torque Nut width  
22mm  
27mm  
0.6mm  
0.6mm  
3.5kg.m  
7.5kg.m  
Note: The connection pipe will be provided or purchased by customer.  
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Installation instructions  
4. Connecting of the Cable  
Front panel  
Terminal (inside)  
Indoor Unit  
Connect the power connecting cord to the indoor unit  
by connecting the wires to the terminals on the control  
board individually in accordance with the outdoor unit  
connection.  
Cabinet  
Chassis  
Indoor unit  
Note: For some models, it is necessary to remove the cabinet to  
connect to indoor unit terminal.  
Outdoor Unit  
1). Remove the access door from the unit by loosening  
the screw. Connect the wires to the terminals on the  
control board individually as the following.  
2). Secure the power connecting cord onto the control  
board with cable clamp.  
Access door  
Terminal(inside)  
3). Reinstall the access door to the original position  
with the screw.  
Outdoor unit  
4) Use a recognized circuit breaker for 24K model between  
the power source and the unit. A disconnecting device to  
adequately disconnect all supply lines must be fitted.  
The figures in this manual are based on the external  
view of a standard model. Consequently, the shape  
may differ from that of the air conditioner you have  
selected.  
Caution:  
1. Never fail to have an individual power circuit specifically for the air conditioner. As for the method of  
wiring, refer to the circuit diagram posted on the inside of the access door .  
2.Comfirm that the cable thickness is as specified in the power source specification.  
(See the cable specification table below)  
3.Check the wires and make sure that they are all tightly fastened after cable connection.  
4. Be sure to install an earth leakage circuit breaker in wet or moist area.  
Cable Specifications  
Power cord  
Power connecting cord  
Capacity  
(Btu/h)  
Normal cross  
- sectional area  
Normal cross  
- sectional area  
Type  
Type  
2.5mm2X3  
1.0mm2X3  
H07RN-F  
H07RN-F  
24K  
Note: The cable will be provided or purchased by customer.  
Attention:  
Accessibility to the plug must be guaranteed even after the installation of the appliance to disconnect  
it in case of need. If not possible, connect appliance to a double-pole switching device with contact  
separation of at least 3 mm placed in an accessible position even after installation.  
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Installation instructions  
Wiring Diagram  
Make sure that the color of wires of the outdoor unit and the terminal No. are the same as those  
of the indoor unit.  
24K Model  
For 24K model, the power supply are connected from outdoor unit, with a circuit breaker.  
HEAT PUMP  
Indoor unit  
Outdoor unit  
Terminal  
Terminal  
Black  
Black  
Power connecting cord  
3
3
Brown  
Brown  
Blue  
2
1
2
1
L
N
Power supply  
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Installation instructions  
Outdoor unit installation  
1.Install Drain Port and Drain Hose (for heat-pump model only)  
The condensate drains from the outdoor unit when the unit operates  
in heating mode. In order not to disturb your neighbor and protect  
the environment, install a drain port and a drain hose to direct the  
condensate water. Just install the drain port and rubber washer to  
the chassis of the outdoor unit, then connect a drain hose to the  
port as the right figure shown.  
Washer  
Drain port  
Drain hose  
(prepare by user)  
2. Install and Fix Outdoor Unit  
Fix with bolts and nuts tightly on a flat and strong floor.  
If installed on the wall or roof, make sure to fix the supporter well to prevent it  
from shaking due to serious vibration or strong wind.  
3. Outdoor Unit Piping Connection  
Remove the valve caps from the 2-way and 3-way valve.  
Connect the pipes to the 2-way and 3-way valves separately according to the required torque.  
4. Outdoor Unit Cable Connection (see previous page)  
Air purging  
The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on the  
compressor. After connecting the indoor and outdoor units, evacuate air and moisture from refrigerant  
cycle using a vacuum pump, as shown below.  
Note: To protect the environment, be sure not to discharge the refrigerant to the air directly.  
See next page for air purging steps.  
Vacuum pump  
indoor unit  
Refrigerant flow direction  
2-way valve  
3-way valve diagram  
3-way valve  
connect to indoor unit  
(6) Open 1/4 turn  
(7) Turn to fully open the valve  
valve cap  
open position  
spindle  
(7) Turn to fully open the  
valve  
Service  
port  
(1) Turn  
(8) Tighten  
(1) Turn  
(8) Tighten  
(2) Turn  
(8) Tighten  
needle  
Valve cap  
Connect to outdoor unit  
Valve core  
service port cap  
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Installation instructions  
How to Purge Air Tubes:  
(1). Unscrew and remove caps from 2 and 3-way valves.  
(2). Unscrew and remove cap from service valve.  
(3). Connect vacuum pump flexible hose to the service valve.  
(4). Start vacuum pump for 10-15 minutes until reaching a vacuum of 10 mm Hg absolutes.  
(5). With vacuum pump still running close the low pressure knob on vacuum pump manifold. Then stop  
vacuum pump.  
(6). Open 2-way valve 1/4 turn then close it after 10 seconds. Check tightness of all joints using liquid  
soap or an electronic leak detector.  
(7). Turn 2 and 3-way valves stem to fully the valves. Disconnect vacuum pump flexible hose.  
(8). Replace and tighten all valve caps.  
Notes  
Please read this manual before installing and using it.  
Do not let air enter the refrigeration system or discharge refrigerant when moving the air conditioner.  
Testing run the air conditioner after finishing installation, and record details of operation.  
Type of fuse used on indoor unit controller is 50T, with rating 3.15A,AC250V. .  
The fuse for the whole unit is to be provided by the user according to the current at maximum power  
Input or use other over-current protective device instead.  
Only the air conditioner can be connected to the power line.  
The power connection for the air conditioner has to be done at the main power distribution which has  
to be of a low impedance.  
In order to ensure the suitability of the equipment for connection, the user should consult with the  
supply authority, if necessary, that the service current capacity at the interface point is sufficient  
for the equipment.  
Refer to the rating plate of the equipment for power consumption details.  
If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or  
similarly qualified person in order to avoid a hazard.  
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NEC Australia Pty. Ltd  
ABN 86 001 217 527  
Home Electronics Group  
NEC Service Centres  
NEW South Wales  
Sydney  
184 Milperra Rd, Revesby 2212  
120 Parry Street, Newcastle 2302  
(02) 9780 8688  
(02) 4926 2466  
Newcastle  
Victoria  
Melborne  
480 Princes Highway, Noble Park 3174 (03) 9554 6245  
Queensland  
Brisbane  
Southport  
116 Ipswich Rd, Woollongabba 4102  
Shop 1, 48 Ferry Rd, Southport 4215  
(07) 3361 5858  
(07) 5591 3670  
South Australia  
Adelaide  
84A Richmond Rd, Keswick, 5053  
(08) 8375 5710  
Western Australia  
Perth  
45 Sarich Courl, Osborne Park 6017  
(08) 9445 5901  
For Service in outer areas, please contact your  
of the nearest Authorized NEC Service Centre.  
retailer for the address  
NEC Australia Pty. Ltd.  
244 Beecroft Road EPPING 2121  
Tel. 131- 632 Fax. (02) 9930 2380  
Version No. 819043175-01  
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