Samsung AM280FNHDEH User manual

Air Conditioner
installation manual
Duct Type Series
BIG duct : AMFNHDEH
imagine the possibilities
Thank you for purchasing this Samsung product.
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2
Contents
■Safety Precautions .......................................................................................................3
■Accessories......................................................................................................................6
■Selecting the Installation Location ......................................................................7
■Indoor Unit Installation .............................................................................................9
■Purging the Unit ........................................................................................................10
■Connecting the Refrigerant Pipe.......................................................................10
■Cutting/Flaring the Pipes.......................................................................................11
■Performing Leak Test & Insulation.....................................................................13
■Drain pipe and Drain hose Installation ..........................................................14
■Wiring Work .................................................................................................................18
■Setting an indoor unit address and installation option.......................... 24
■Setting temperature control of discharge air..............................................35
■Final Checks and User Tips....................................................................................36
■Troubleshooting ........................................................................................................37
■Option table.................................................................................................................39
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3
Safety Precautions
The following safety precautions must be taken when using your air conditioner.
WARNING
• Risk of electric shock can cause injury or death. • Disconnect all remote
electric power supplies before servicing, installing or cleaning.
• Installation must be done by the manufacturer or service agent or a
similar qualified person in order to avoid a hazard.
InstallIng the unIt
The unit should not be installed by the user. Ask the dealer or
authorized company to install the units.
If the unit is installed improperly, water leakage, electric shock or fire
may result.
Mount with the lowest moving parts at least 2.5 m above the oor or
grade level. (If applicable)
The manufacturer does not assume responsibility for accidents or
injury caused by an incorrectly installed air conditioner. If you are
unsure about installation, contact an installation specialist.
When installing the built-in type air conditioner, keep all electrical
cables such as the power cable and the connection cord in pipe, ducts,
cable channels e.t.c to protect them against liquids, outside impacts
and so on.
The air conditioner should be used only for the applications for which
it has been designed: the indoor unit is not suitable to be installed in
areas used for laundry.
This appliance is not accessible to the general public. This appliance
should be installed according to the provided installation instruction.
When installing the air conditioner in a small room, the measure not to
exceed the dangerous density is needed.
- When refrigerant leaks and exceeds the dangerous density,
suffocation may occur.
If any gas or impurities except R410A refrigerant come into the
refrigerant pipe, serious problem may occur and it may cause injury.
Use only rated accessories and install the air conditioner with rated
equipments.
- If you dont’t use the rated accessories, the air conditioner may
drop from its place, water may leak or electric shock or fire may occur.
Ventilate your room when refrigerant gas leaks during installation.
- Toxic gas may generate when refrigerant gas contacts with heat.
Our units must be installed in compliance with the spaces indicated in
the installation manual to ensure either accessibility from both sides or
ability to perform routine maintenance and repairs. The units’
components must be accessible and that can be disassembled in
conditions of complete safety either for people or things.
For this reason, where it is not observed as indicated into the
Installation Manual, the cost necessary to reach and repair the unit (in
safety, as required by current regulations in force) with slings, trucks,
scaolding or any other means of elevation won’t be considered
in-warranty and charged to end user.
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4
Safety Precautions (Continued)
Power suPPly lIne or cIrcuIt breaker
If the power cable of this air conditioner is damaged, it must be
replaced by service agent or similarly qualied persons in order to
avoid a hazard.
The unit must be plugged into an independent circuit if applicable or
connect the power cable to the auxiliary circuit breaker. An all pole
disconnection from the power supply must be incorporated in
the fixed wiring with a contact opening of >3mm.
The air conditioner must be installed in accordance with national
wiring regulations and safety regulations wherever applicable.
The electric work must be done by service agent or similarly qualied
persons according to national wiring regulations and use only rated
cable.
- If the capacity of the power cable is insufficient or electric work
is not properly completed, electric shock or fire may occur.
Install the cables with supplied cables firmly. Fix them securely so
that external force is not exerted to the terminal board.
- If the connection or fixing is incomplete, heat generation,
electric shock or fire may occur.
Connect the power cable between the indoor and outdoor unit
properly so that the electrical component box cover is not get loosen
and attach the cover securely.
- If the the cover is attached incompletely, heat generation,
electric shock or fire of the terminal board may occur.
Be sure not to perform power cable modification, extension wiring,
and multiple wire connection.
- It may cause electric shock or fire due to poor connection, poor insu-
lation, or current limit override.
- When extension wiring is required due to power line damage, refer
to “How to connect your extended power cables” in the installation
manual.
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5
Safety Precautions (Continued)
 Make sure that you earth the cables.
- Do not connect the earth wire to the gas pipe, water pipe, lighting
rod or telephone wire. If earthing is not complete, electric shock or
fire may occur.

Install the circuit breaker.
- If the circuit breaker is not installed, electric shock or fire may occur.

Make sure that the condensed water dripping from the drain hose
runs out properly and safely.

Install the power cable and communication cable of the indoor and
outdoor unit at least 1m away from the electric appliance.

Install the indoor unit away from lighting apparatus using the ballast.
- If you use the wireless remote control, reception error may occur
due to the ballast of the lighting apparatus.

Do not install the air conditioner in following places.
- Place where there is mineral oil or arsenic acid.
Resin parts flame and the accessories may drop or water may leak.
The capacity of the heat exchanger may reduce or the air conditioner
may be out of order.
- The place where corrosive gas such as sulfurous acid gas generates
from the vent pipe or air outlet.
The copper pipe or connection pipe may corrode and refrigerant
may leak.
- The place where there is a machine that generates electromagnetic
waves.
The air conditioner may not operate normally due to control system.
- The place where there is a danger of existing combustible gas,
carbon fiber or flammable dust.
The place where thinner or gasoline is handled.
Gas may leak and it may cause fire.
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6
Accessories
The following accessories are supplied with the indoor unit.
The type and quantity may differ depending on the specifications.
User's
manual Installation manual Pattern sheet
Insulation cover
pipe out Insulation pipe(A) Insulation pipe(B)
WasherClamp hoseFlexible hose
Cable tie
Sleeve
Rubber
Insulation cover
pipe in
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7
The following accessories are supplied with the indoor unit.
The type and quantity may differ depending on the specifications.
Selecting the Installation Location
Indoor Unit
There must be no obstacles near the air inlet and outlet.
Install the indoor unit on a ceiling that can support its weight.
Maintain sufficient clearance around the indoor unit.
Make sure that the water dripping from the drain hose runs away correctly and safely.
The indoor unit must be installed in this way, that they are out of public access. (Not touchable by the users)
After connecting a chamber, insulate the connection part between the indoor unit and the chamber
with t10 or thicker insulation. Otherwise, there can be air leak or dew from the connection part.
Rigid wall without vibration.
Where it is not exposed to direct sunshine.
Where the air filter can be removed and cleaned easily.
You must have 20mm or more space between the ceiling and the bottom of indoor unit. Otherwise, the noise from the vibration of
indoor unit may bother the user. When the ceiling is under construction, the hole for check-up must be made to take service, clean
and repair the unit.
It is possible to install the unit at an height of between 2.2~2.5m from the ground, if the unit has a duct with a well defined lenght
(300mm or more), to avoid fan motor blower contact.
Space requirements for installation & service
 Construction Standard for Inspection Hole.
1) In case, the ceiling is textile, Inspection hole dose not need.
2) In case, the ceiling is plaster board, Inspection hole depends on Inside height of the ceiling.
a. Height is more than 1m : Only“B” [Inspection for PBA] is applied.
b. Height is less than 1m : Both“A”& ”B” are applied.
c. “A” & ”B” are inspection holes.
Unit Width(W)
“A”=W+100mm “B”=500mm
Unit Depth(D)+50mm
20mm or more
20mm or more
Insulation Guide
Thickness: more than 10mm
Indoor unit A B C D Front/Back
20.0~28.0kW
(1240x470x1040) 1240x1040 1240x1040 470x1040 470x1040
Insulate the front and back side
in proper size at the same time
when insulating the suction duct
and discharge duct.
Insulate the end of the pipe and some curved area by using separate insulator.
Insulate the discharge and suction part at the same time when you insulate connection duct.
A
Front
C
B
Back
D
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8
Drawing of the indoor unit
No. Name Description
1
Liquid pipe connection ø9.52
2
Gas pipe connection
220 : ø19.05
280 : ø22.22
3
Drain pipe connection VP25 (OD ø32, ID ø25)
4
Drain pipe connection (Option drain pump) VP25 (OD ø32, ID ø25)
5
Power supply/Communication connection
6
Air discharge grille flange
7
Air suction flange
8
Hook Φ9.52 or M10
Selecting the Installation Location (Continued)
140X8=1120
1306 Suspension position
1188 Air inlet duct flange
1188 Air outlet duct flange
Discharge side Suction side
1040
140X8=1120
34
1240
OD 32
35
470
660
647
598
29
93
22
209
236
385
100X2=200
914 Suspension position
Unit : mm
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9
Suction side
 Ensure that the ceiling is strong enough to support
the weight of the indoor unit.
Before hanging the unit, test the strength of each
attached suspension bolt.
 If the length of suspension bolt is more than 1.5m,
it is required to prevent vibration.
 If this is not possible, create an opening on the false
ceiling in order to be able to use it to perform the required
operations on the indoor unit.
You must install the suspension bolts more than four when
installing the indoor unit.
Place the pattern sheet on the ceiling at the spot where you want to install the
indoor unit.
Insert bolt anchors, use existing ceiling supports or construct a suitable support
as shown in figure.
Install the suspension bolts depending on the ceiling type.
Screw eight nuts to the suspension bolts making space for hanging the
indoor unit.
Hang the indoor unit to the suspension bolts between two nuts.
Screw the nuts to suspend the unit.
Adjust level of the unit by using measurement plate for all 4 sides.
Since the diagram is made of paper, it may shrink or stretch slightly
due to temperature or humidity. For this reason, before drilling the
holes maintain the correct dimensions between the markings.
Note
For proper drainage of condensate, give a 1° slant to the left or
right side of the unit which will be connected with the drain hose,
as shown in the figure. Make a tilt when you wish to install the
drain pump, too.
Note
Piping must be laid and connected inside the ceiling when
suspending the unit. If the ceiling is already constructed, lay the
piping into position for connection to the unit before
placing the unit inside the ceiling.
Note
It is recommended to install theY-joint before installing the indoor unit.
1
2
3
4
5
6
7
Indoor Unit Installation
Concrete
Suspension bolt(Φ9.52 or M10)
Hole in anchor
Hole in plug
Insert
Drain hose port
1°
Rubber
Ceiling support
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10
Purging the Unit
On delivery, the indoor unit is loaded with inert gas.
All this gas must therefore be purged before connecting the assembly piping.
To purge the inert gas, proceed as follows.
To prevent dirt or foreign objects from getting into the pipes
during installation, do NOT remove the pinch pipe completely until
you are ready to connect the piping.
Note
Unscrew the pinch pipe at the end of each refrigerant pipe.
Result: All inert gas escapes from the indoor unit.
Connecting the Refrigerant Pipe
Refrigerant oil
Torque wrench
Flare nut
Union
Spanner
Liquid
refrigerant port
Gas refrigerant port
Welding flame
Wet cloth
The designs and shape are subject to change
according to the model.
A
There are two refrigerant pipes of differing diameters:
A smaller one for the liquid refrigerant
A larger one for the gas refrigerant
The inside of copper pipe must be clean & has no dust.
The connection procedure for the refrigerant pipes varies according to the exit
position of the pipes from the indoor unit, as seen when facing the indoor in the “A”
side.
Liquid refrigerant port
Gas refrigerant port
Drain hose port
1
Remove the pinch pipe on the pipes and connect the assembly pipes to each
pipe, tightening the nuts, first manually and then with a torque wrench, a
spanner applying the following torque.
Outer Diameter
Torque
kgf•cm N•m
6.35 mm 140~180 14~18
9.52 mm 350~430 34~42
12.70 mm 500~620 49~61
15.88 mm 690~830 68~82
Must apply refrigerant oil on the flaring area to prevent a leak.Note
2Be sure that there must be no crack or kink on the bended area.
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11
Cutting/Flaring the Pipes
1Make sure that you prepared the required tools.
(pipe cutter, reamer, flaring tool and pipe holder)
2If you want to shorten the pipe, cut it using a pipe cutter ensuring that the cut
edge remains at 90° with the side of the pipe. There are some
examples of correctly and incorrectly cut edges below.
Oblique Rough Burr
3To prevent a gas leak, remove all burrs at the cut edge of the pipe using
a reamer.
Flaring tool
Clutch type Wing nut type
A
Die
Copper pipe
York
Die
Copper pipe
Flare nut
4Carry out flaring work using flaring tool as shown below.
Outer diameter
D(mm)
A(mm)
Flare tool for
R410A clutch type
Conventional flare tool
Clutch type Wing nut type
6.35 0~0.5 1.0~1.5 1.5~ 2.0
9.52 0~0.5 1.0~1.5 1.5~ 2.0
12.70 0~0.5 1.0~1.5 1.5~ 2.0
15.88 0~0.5 1.0~1.5 1.5~ 2.0
5Check if you flared the pipe correctly. There are some examples of
incorrectly flared pipes below.
Uneven ThicknessCrackedDamaged SurfaceInclinedCorrect
6Align the pipes and tighten the flare nuts first manually and then with a torque
wrench, applying the following torque.
Outer diameter
D(mm)
Connection Torque Flare dimension
A(mm)
Flare shape
(mm)
kgf•cm N•m
6.35 140~180 14~18 8.70~9.10
90° ±2°
45° ±2°
R 0.4~0.8
D
A
9.52 350~430 34~42 12.80~13.20
12.70 500~620 49~61 16.20~16.60
15.88 690~830 68~82 19.30~19.70
In case of needing brazing, you must work with Nitrogen gas blowing.
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12
LEAK TEST WITH NITROGEN (before opening valves)
In order to detect basic refrigerant leaks, before recreating the vacuum and
recirculating the R410A, it’s responsible of installer to pressurize the whole
system with nitrogen (using a pressure regulator) at a pressure above
4.1MPa (gauge).
LEAK TEST WITH R410A (after opening valves)
Before opening valves, discharge all the nitrogen into the system and
create vacuum. After opening valves check leaks using a leak detector for
refrigerant R410A.
Leak test
Insulation
Once you have checked that there are no leaks in the system,
you can insulate the piping and hose.
1
To avoid condensation problems, place T13.0 or thicker Acrylonitrile
Butadien Rubber separately around each refrigerant pipe.
Note Always make the seam of pipes face upwards.
2
Wind insulating tape around the pipes and drain hose avoiding to compress
the insulation too much.
3
Finish wrapping insulating tape around the rest of the pipes leading to the
outdoor unit.
4
The pipes and electrical cables connecting the indoor unit with the outdoor
unit must be fixed to the wall with suitable ducts.
Discharge all the nitrogen to create a vacuum and charge
the system.
All refrigerant connection must be accessible, in order to permit
either unit maintenance or removing it completely.
No gap
NBR(T13.0 or thicker)
Insulation cover pipe
Indoor unit
Be sure to overlap
the insulation
Must fit tightly against body
without any gap.
Insulation pipe
Leak check
Performing Leak Test & Insulation
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13
Performing Leak Test & Insulation
Gas pipe
Liquid pipe
Insulation
Insulation
Gas pipe
10mm
Liquid pipe
10mm10mm
5 Select the insulation of the refrigerant pipe.

Insulate the gas side and liquid side pipe referring to the thickness
according to the pipe size.
 Indoor temperature of 30°C and humidity of 85% is the standard condition.
If install in a high humidity condition, use one grade thicker insulator by
referring to the table below.
If installing in an unfavorable conditions,use thicker one.
 Insulation’s heat-resistance temperature should be more than 120℃.
Pipe Pipe size
Insulation Type(Heating/Cooling)
Remarks
Standard
[30
°C , 85% ]
High humidity
[30 °C , over85% ]
EPDM, NBR
Liquid
pipe
ø
6.35~
ø
9.52 9t 9t
Internal temperature
is higher than 120
°C
ø
12.70~
ø
50.80 13t 13t
Gas
Pipe
ø
6.35 13t 19t
ø
9.52~
ø
25.40 19t 25t
ø
28.58~
ø
44.45 32t
ø
50.80 25t 38t
 When installing insulation in places and conditions below, use the same
insulation that is used for high humidity conditions.
<Geological condition>
- High humidity places such as shoreline, hot spring, near lake or river, and
ridge (when the part of the building is covered by earth and sand.)
<Operation purpose condition>
- Restaurant ceiling, sauna, swimming pool etc.
<Building construction condition>
- The ceiling frequently exposed to moisture and cooling is not covered.
e.g. The pipe installed at a corridor of a dormitory and studio or near an
exit that opens and closes frequently.
- The place where the pipe is installed is highly humid due to the lack of
ventilation system.
Refrigerant pipe before EEV kit and MCU or without EEV kit and MCU
 You can contact the gas side and liquid side pipes but the pipes
should not be pressed.
 When contacting the gas side and gas side pipe, use 1 grade thicker
insulation.
Refrigerant pipe after EEV kit and MCU
 Install the gas side and liquid side pipes, leave 10mm of space.
 When contacting the gas side and liquid side pipe, use 1 grade
thicker insulation.
Install the insulation not to get wider and use the adhesives
on the connection part of it to prevent moisture from entering.
Wind the refrigerant pipe with insulation tape if it is exposed to
outside sunlight.
Install the refrigerant pipe respecting that the insulation does not
get thinner on the bent part or hanger of pipe.
Add the additional insulation if the insulation plate gets thinner.
Additional insulation
Hanger
Refrigerant pipe insulation
a×3
a
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14
Drain pipe and Drain hose Installation
Care must be taken when installing the drain hose for the indoor unit to ensure that
any condensate
water is correctly drained outside. The drain hose can be installed to the right or left
side of the base pan.
1Unscrew the 4 tapped screws to remove the cover of the drain hose
connection port.
2Insert the flexible hose to the drain hose port.
3Install the drain hose so that its length can be as short as possible.
Internal diameter of the drain hose should be the same or slightly bigger
than the external diameter of the drain hose port.
4Wrap the drain hose with the insulation drain as shown in figure and
secure it.
Fix the flexible hose to the indoor unit with the supplied
cable clamp securely.
(Use the screwdriver to fix the flexible hose securely.)
Note
Inner diameter of the drain hose
Give a slightly slant to the drain hose for proper drainage
of condensate.
Fix the flexible hose to the PVC with the supplied cable tie
securely.
Note
Flexible hoseInsulation
Cable-tie
Clamp hose
Drain hose connection port
Cable
Clamp
No gap
Indoor
Unit
32mm(Inner diameter)
Must fit tightly against body
without any gap.
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15
Drain pipe and Drain hose Installation
1Install horizontal drain pipe with a slope of 1/100 or more and fix it by hanger
space of 1.0~1.5m.
2Install U-trap at the end of the drain pipe to prevent a nasty smell to reach
the indoor unit.
3Do not install the drain pipe to upward position. It may cause water flow back
to the unit.
Drain pipe Connection
Without the drain pump
1The drain pipe should be installed within 330mm from the flexible hose and
then lift down 20mm or more.
2Install horizontal drain pipe with a slope of 1/100 or more and fix it by hanger
space of 1.0~1.5m.
3Install the air vent in the horizontal drain pipe to prevent water flow back to
the indoor unit.
You may not need to install it if there were proper slope in the
horizontal drain pipe.
Note
4The flexible hose should not be installed upward position, it may cause
water flow back to the indoor unit.
With the drain pump
Flexible hose
Air vent
300mm or less
Horizontal drain pipe
more than 1/100 slope
Within 330mm
1~1.5m
200mm or more
Ceiling
Hanger
20mm or more
H
2
1
1~1.5m
Horizontal drain pipe
more than 1/100 slope
Ceiling
Drain pipe cleaning hole
Hanger
H≥50mm
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16
Drain pipe and Drain hose Installation (Continued)
1Install horizontal drain pipe with a slope of 1/100 or more and fix it by
hanger space of 1.0~1.5m.
2Install U-trap at the end of the drain pipe to prevent a nasty smell to reach
the indoor unit.
Centralized Drainage
Without the drain pump
1Install main air vent at the front of the farthest indoor unit from the main
drain when installed indoor units are more than 3.
2You may need to install individual air vent to prevent water flow back at the
top of each indoor unit drain pipe.
With the drain pump
Hanger
Main drain pipe
Individual
air vent
Main air vent
Centralized horizontal drain pipe
(more than 1/100 slope)
330mm or
less
1~1.5m
100mm or more
Ceiling
Horizontal drain pipe
more than 1/100 slope
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17
Drain pipe and Drain hose Installation (Continued)
Drain pan
Prepare a little water about 2 liters.
Pour water into the drain pan in the indoor unit as shown in figure.
1
When the drain pump is installed, operate the unit as cooling mode and check a
drain pump pumping.
3
Testing the drainage
Confirm that the water flows out through the drain hose.
2
Reassemble the cover of water supply intake.
6
Check drain water drops at the end of the drain pipe.
4
Make sure there is no water leak at the drainage.
5
Drain pipe
Drain water drops
The designs and shape are subject to change
according to the model.
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18
1Before wiring work, you must turn off all power source.
2Indoor unit power should be supplied through the breaker
( ELCB or MCCB+ELB ) separated by the outdoor power.
ELCB: Earth Leakage Circuit Breaker
MCCB: Molded Case Circuit Breaker
ELB: Earth Leakage Breaker
3The power cable should be used only copper wires.
4Connect the power cable{1(L), 2(N)} among the units within maximum
length and communication cable(F1, F2) each.
5Connect F3, F4(for communication) when installing the wired remote
control.
Power and communication cable connection
Wiring Work
Connecting power for optional product
When installing optional product, make sure to follow below current capacity.
 Optional product is not supplied by manufacturer.
AC, Below 2A AC, Below 2A
HOT
T/B 1(L) 2(N) Vc Vc Vw Vw
POWER : L
VENTILATOR
OPTION
POWER : N
COIL
ELCB
MCCB+
ELB
Indoor Unit 1
Outdoor Unit
Indoor Unit 2 Indoor Unit 3
Wired Remote
Control
220-240V~
or
ELCB : Essential Installation
WARNING :
Power off before connecting any wires;
Indoor PBA will be damaged while V1,V2,F3,F4 short each other.
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19
1Before wiring work, you must turn off all power source.
2Indoor unit power should be supplied through the breaker
( ELCB or MCCB+ELB ) separated by the outdoor power.
ELCB: Earth Leakage Circuit Breaker
MCCB: Molded Case Circuit Breaker
ELB: Earth Leakage Breaker
3The power cable should be used only copper wires.
4Connect the power cable{1(L), 2(N)} among the units within maximum
length and communication cable(F1, F2) each.
5Connect F3, F4(for communication) when installing the wired remote
control.
Wiring Work
Unit Model Rating current
AMFNHDEH

220

3.8A

280

5.9A
 Rating current
Specification of electronic wire
Power supply MCCB ELB or ELCB Power cable Earth cable Communication
cable
Max : 242V
Min : 198V XA X A, 30mmA
0.1 s 2.5mm22.5mm20.75~1.5mm2
 Run transmission wiring between the indoor and outdoor units through a con-
duit to protect against external forces, and feed the conduit through the wall
together with refrigerant piping.
Decide the capacity of ELCB(or MCCB+ELB) by below formula.
The capacity of ELCB(or MCCB+ELB) X[A] = 1.25 X 1.1 X ∑Ai
 X : The capacity of ELCB(or MCCB+ELB).
 ∑ Ai : Sum of Rating currents of each indoor unit.
 Refer to each installation manual about the rating current of indoor unit.
Decide the power cable specification and maximum
length within 10% power drop among indoor units.
 coef: 1.55
 Lk: Distance among each indoor unit[m]
Ak: Power cable specification[mm2]
ik: Running current of each unit[A]
∑ ( Coef×35.6×Lk×ik) < 10% of input
voltage[V]
1000×Ak
n
k=1
Silver solder
Selecting compressed ring terminal
Norminal
dimensions for
cable (mm2)
Norminal
dimensions for
screw (mm)
B D d1 E F L d2 t
Standard
dimension
(mm)
Allowance
(mm)
Standard
dimension
(mm)
Allowance
(mm)
Standard
dimension
(mm)
Allowance
(mm)
Min. Min. Max.
Standard
dimension
(mm)
Allowance
(mm)
Min.
1.5 46.6 ±0.2 3.4 +0.3
-0.2 1.7 ±0.2 4.1 616 4.3 +0.2 00.7 4 8
2.5 46.6 ±0.2 4.2 +0.3
-0.2 2.3 ±0.2 6 6 17.5 4.3 +0.2 00.8 48.5
4 4 9.5 ±0.2 5.6 +0.3
-0.2 3.4 ±0.2 6 5 20 4.3 +0.2 00.9
When installing optional product, make sure to follow below current capacity.
 Optional product is not supplied by manufacturer.
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20
Wiring Work (Continued)
Example of Installation
- Total power cable length L = 100(m), Running current of each units 1[A]
- Total 10 indoor units were installed.
10[A]
Indoor unit10
20[m]10[m]0[m]
9[A] 1[A]
100[m]
Indoor unit2Indoor unit1
Apply following equation.
∑ ( Coef×35.6×Lk×ik) < 10% of input
voltage[V]
1000×Ak
n
k=1
Calculation
 Installing with 1 sort wire
220[V]
-2.2[V] -2.0[V]
············ 2.5[mm2]············
208.8[V](Within 198V~242V)
-(2.2+2.0+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-11.2[V]
it's okay.
2.5[mm2]2.5[mm2]
 Installing with 2 different sort wire
220[V] -1.4[V] -1.2[V]
············ 2.5[mm2]············
209.5[V](Within 198V~242V)
-(1.4+1.2+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-10.5[V]
it's okay.
4.0[mm2]4.0[mm2]
ELCB
or MCCB+
ELB
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