DVM PLUS III HR
RDVRXF Series
Air Conditioner
installation manual
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E S F P DB98-32805A(2)
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safety information
SAFETY INFORMATION
Before installing an air conditioner, please read this manual thoroughly to ensure that you know how to
safely and efficiently install a new appliance.
 DVM PLUS III HR air conditioner uses R410A refrigerant.
- When using R410A, moisture or foreign substances may affect the capacity and reliability of the product.
Safety precautions must be taken when installing the refrigerant pipe.
- The designing pressure of the system is 4.1MPa. Select appropriate material and thickness according to the
regulations.
- R410A is a quasi-azeotrope of two refrigerants.
Make sure to charge with liquid phase when filling refrigerant.
If you charge gaseous refrigerant, it may affect the capacity and reliability of the product as a result of change
formation of the refrigerant.
 Connect the indoor units for R410A refrigerant. Check whether the indoor units can be connected with the
product’s catalogue. (When incorrect indoor units are connected, they cannot operate normally.)
SEVERE WARNING SIGNS
If you don’t follow the safety precautions, you may get the risk of serious wound or death.
The installation must be done by the installer or its service agent or a qualified
person in order to avoid a hazard.
• Installation by an unqualified person may cause a water leakage, electric shock or fire and
so on.
The electric work must be done by service agent or qualified persons according to
national wiring regulations and use only rated cable.
• Use certified power cable in the market suggested here and do electric work according
to installation manual otherwise, electric shock or fire may occur.
Install the outdoor unit correctly according to the installation manual.
• An incorrect installation may cause a water leakage, electric shock or fire and so on.
Manufacturer is not responsible for accidents due to incorrect installation.
When installing the unit in a small room, take measures in order to keep the
refrigerant concentration from exceeding allowable safety limits in the event
of a refrigerant leak.
• Excessive refrigerant concentration in a closed room can lead to oxygen deficiency.
Use certified parts in the market and supplied parts from the factory.
• If you don’t use the certified parts and tools, it can cause trouble to the air conditioner
and bring into injury.
Install the outdoor unit on a hard and even place that can support its weight.
• If the place cannot support its weight, the outdoor unit may fall down and it may cause injury.
Fix the outdoor unit securely on foundation to resist strong wind or
earthquake.
• If the outdoor unit is not properly fixed, it turns over and accidents may occur.
Fix power cable on fixture of outdoor unit securely not to be pulled out by
external force.
• If fixing is incomplete, it can cause trouble with a heat generation, electric shock or fire
and so on.
02_ safety information
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Arrange the cables between the indoor and outdoor unit after connecting.
Attach the cover securely so that the electrical component box cover does
not get loosen.
• If the cover is attached incompletely, it can cause trouble with a heat generation, electric
shock or fire of the terminal board.
Install MCCB and ELB according to installation manual.
• If you do not install the MCCB and ELB, electric shock or fire may occur.
ENGLISH
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(1/8").
If any gas or impurities except R410A refrigerant come into the refrigerant
pipe, serious problem may occur and it may cause injury.
Make sure that there is no leakage after installation.
• Toxic gas may generate when refrigerant gas contacts with fire.
Leak test must be done using only Nitrogen gas.
When the product operates in heat mode during winter time, it operates
protection mode when the outdoor temperature drops below 0°C. Therefore,
supply the power during winter time. If the power is not supplied, compressor
protection mode will not operate and cause product malfunction.
Do not modify the product on your own.
• Potential risk of electric shock, fire, product failure or injury.
CAUTION SIGNS
If you don’t follow the safety precautions, you may get the risk of injury or loss of property.
Make sure of a earthing.
• Do not connect the earth wire to the gas pipe, water pipe, lighting rod or telephone wire.
If earthing is incomplete, electric shock or fire may occur.
Do not connect the heater to the outdoor unit and do not install altered duct
as you please.
• The capacity may reduce, electric shock or fire may occur.
Make sure that the condensed water dripping from the drain hose runs out
properly and insulate the drain pipe so that frost does not generate.
• Household goods may get wet if the drain pipe is not properly installed.
Install the indoor unit away from lighting apparatus using the ballast.
• If you use the wireless remote control, it may not operate normally.
Do not install the air conditioner in following places.
• T
he place where there is mineral oil or arsenic acid.
Those parts may get damaged due to burned resin.
The efficiency 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, thinner or gasoline is
handled.
• The place where carbon fiber or flammable dust is.
• T
he place where like spa and shore.
safety information _03
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safety information
CAUTION SIGNS
Install the power cable and communication cable of the indoor and outdoor
unit at least 1.5m(5') away from the electric appliances and install it at least
2m(6.5') away from the cable from the lightning rod.
• Noise may heard depending on the electric wave though the cables.
Install the outdoor unit within the angle of 25~55˚ depending on the building
height as below table.
Building height Protective angle
Below 20m(65ft)
55˚
Remarks
Lightning rod
Protective angle: 25~55˚
Below 40m(131ft)
35˚
Below 60m(196ft)
25˚
Building
Changes in DVM PLUS III HR comparing with conventional models(DVM PLUS II)
• U
se R410A refrigerant.
• Check indoor units, distributor kits, etc which are connected with DVM PLUS III HR are
compatible with DVM PLUS III HR or not.
• Version of AVXE/NDA and higher is available.
• Make sure the combination method of outdoor units is different from DVM PLUS II.
• The length of maximum piping, level difference, the quantity of connectable indoor units,
the installation at the outdoor joints and the outdoor unit combinations are different from
the conventional models.
• Outdoor joint of gas side pipe should be installed horizontally due to the combination of
variable units when the height of the main pipe is lower than the outlet of the pipe of the
outdoor unit. The Installation of the liquid pipe and high pressure gas pipe are the same.
• If the pipe length between outdoor units becomes 2m(6.5') or more, install vertical trap
to upstream to prevent oil from getting accumulated in the pipes of the outdoor unit in
case of part load operation with the states which the last outdoor unit stops operating.
04_ safety information
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contents
PREPARING THE INSTALLATION
6
15
COMPLETING THE INSTALLATION AND
COMMISSIONING
42
Shape of the outdoor unit
Accessories
Optional accessories
Outdoor unit combination
Selecting proper location for installation
Space requirements
Single installation
Group installation
Moving the outdoor unit
Detaching fasteners
Installing the outdoor unit
Anchor specifications
Intalling duct for horizontal exhaust discharge
Installing the outdoor unit in harsh environments
Installing the drain pipe
ENGLISH
INSTALLING THE UNIT
6
6
6
7
8
9
9
9
10
10
11
12
12
13
14
15 Refrigerant piping works
15
Selecting the refrigerant pipe
16
Pipe selection for DVM PLUS III HR
17
Additional refrigerant charging
17
Equivalent length calculations
18
Keeping refrigerant pipe clean and dry
18
Brazing the pipe
19
Cutting or Flaring the pipes
20
Aligning the pipes
21
Free piping & wiring directions
22
Connecting the outdoor unit pipe
23
Piping works among outdoor units
24The examples of the refrigerant pipe installation
25
Piping examples
26
Installing the branch joints
30 Wiring work
30Manufacturer’s recommended specifications of
the circuit breaker and power cable
31Power supply and communication cable
configuration
31Specifications of the cable tube
32
Power wiring diagram
33
Selecting solderless ring terminal
33
Connecting the power terminal
34
Power cable arrangement
35
Grounding work
36 Performing the refrigerant gas leak test
37 Vacuum drying
38 Insulating the refrigerant pipe
38
Insulating the refrigerant
38Selecting the insulation of the refrigerant pipe
38
Insulating the refrigerant pipe
39
Insulating the branch joint
42
42
44
44
45
47
48
48
49
Charging refrigerant
Service valve work for gas pipe
Setting the option switches & function keys
Option switch of the outdoor unit
Key function
Completing the installation
Final checks and trial operation
Inspection before trial operation
Trial operation
contents _05
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preparing the installation
SHAPE OF THE OUTDOOR UNIT
Shape
RD075/100VRX
Heat Pump
RD125VRX
Accessories
• Keep supplied accessories until the installation is finished.
• Hand the installation manual over to the customer after finishing installation.
• The quantities are indicated in parentheses.
Installation manual (1)
Drain plug (2)
Cap drain (2)
Cable tie (4)
Remarks
-
-
-
For closing the drain hole
Optional accessories
• The following accessories are needed when installing the outdoor and indoor unit.
Type
Y-joint
Y-joint
(Only for DVM PLUS III HR module)
Header joint
Model
Capacity of outdoor unit
MXJ-YA1509
51MBH and below
MXJ-YA2512
51~138MBH
MXJ-YA2812
138~160MBH
MXJ-YA2815
160~240MBH
MXJ-YA3119
240~336MBH
MXJ-YA3819
336~438MBH
MXJ-YA1500
80MBH and below
MXJ-YA2500
80~240MBH
MXJ-YA3100
240~468MBH
MXJ-HA2512
160MBH and below
MXJ-HA3115
160~240MBH
MXJ-HA3819
Over 240MBH
Outdoor joint
MXJ-T3819
12~30Ton
Outdoor joint
(Only for DVM PLUS III HR module)
MXJ-T3100
12~30Ton
• W
hen the indoor units without EEV such as wall mounted and ceiling type are installed, it is
necessary to install distribution kits.
• It is necessary to install MCU when HR units are installed.
• Distribution kits and MCU should be purchased from the factory.
06_ preparing the installation
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OUTDOOR UNIT COMBINATION
CAUTION
ENGLISH
• Make sure an indoor unit is compatible with DVM PLUS III HR
• Indoor units can be connected within a following table range.
• If the total capacity of the connected indoor units exceeds the suggested guideline, the indoor unit
cooling and heating capacity may decrease.
• Total capacity of the connected indoor units can be allowed to be from 50% to 130% over outdoor
capacity. (Depending on operation condition, the ratio of total capacity of the connected indoor units
over outdoor unit capacity should be considered carefully.)
0.5x∑ (Outdoor unit capacity) ≤ Total capacity of the connected indoor units ≤ 1.3x∑ (Outdoor unit
capacity)
• Up to 40 indoor units can be connected to an outdoor unit. The communication address of the indoor
unit sets following the quantity of the maximum indoor unit connected.
• The minimum capacity of the indoor unit is 6.0MBH.
Make sure to follow the table for combination installation of outdoor units.
1. Basic models
Classification
Single unit
Total capacifities of the Maximum number
connectable indoor units of connectable
(MBH)
indoor units
Capacity
(Ton)
Capacity
(HP)
Model
6
7.5
RD075VRXFA
36MBH ~ 93.6MBH
10
8
10
RD100VRXFA
48MBH ~ 124.8MBH
10
10
12.5
RD125VRXFA
60MBH ~ 156.0MBH
14
2. Combinations
Classification
Module unit
Basic model
Capacity Capacity
Total capacifities of the
Maximum number of
(Ton)
(HP) RD075VRXFA RD100VRXFA RD125VRXFA connectable indoor units (MBH) connectable indoor units
72MBH ~ 187.2MBH
16
1
84MBH ~ 218.4MBH
18
20.0
2
96MBH ~ 249.6MBH
20
18
22.5
1
1
108MBH ~ 280.8MBH
24
20
25.0
2
120MBH ~ 312.0MBH
28
22
27.5
2
132MBH ~ 343.2MBH
30
24
30.0
3
144MBH ~ 374.4MBH
32
26
32.5
2
1
156MBH ~ 405.6MBH
34
28
35.0
1
2
168MBH ~ 436.8MBH
36
30
37.5
3
180MBH ~ 468.0MBH
40
12
15.0
2
14
17.5
1
16
1
preparing the installation _07
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preparing the installation
SELECTING proper LOCATION FOR INSTALLATION
Decide the installation location based on the following condition and obtain the user’s approval.
• A
void a place that may disturb your neighbor. Noise may occur from the outdoor unit and the
discharged air may run into the neighborhood. (Be careful of the operation time in a residential area)
• Install the outdoor unit on a hard and even area that can support its weight.
• Choose a flat place that rainwater does not settle or leak.
• Choose a place avoiding strong winds.
• Maintain sufficient space for repairs and service.
• Choose a place where you can easily connect the pipes and cables to the indoor unit.
• Make sure that the condensed water dripping from the drain hose runs out properly and safely.
• When installing the outdoor unit near seashore, make sure it is not directly exposed to sea breeze.
If you can not find a adequate place without direct see breeze, protection wall should be constructed.
- Install the outdoor unit in a place (such as near buildings etc.) where it can be prevented from sea breeze
which can damage the outdoor unit.
Outdoor
unit
Sea
breeze
Sea
Sea
breeze
Outdoor
unit
Sea
- If you cannot avoid installing the outdoor unit by the seashore, construct a protection wall around to block the sea breeze.
 Protection wall should be constructed with a solid material such
Protection
Outdoor
wall
unit
as concrete to block the sea breeze and the height and the width
of the wall should be 1.5 times larger than the size of the outdoor
Sea
breeze
unit. Also, secure over 700mm(28") between the protection wall
Sea
and the outdoor unit for exhausted air to ventilate.
- Install the outdoor unit in a place where water can drain smoothly.
 If you cannot find a place satisfying above conditions, please contact manufacturer.
Make sure to clean the sea water and the dust on the outdoor unit heat exchanger and spread
corrosion inhibitor on heat exchanger. (At least one time per one year.)
•
•
•
•
Choose a place where there is no direct sunlight.
Choose a place where it could not come into contact with snow and rain.
Choose a place where flammable gas does not leak.
Choose a place where the indoor and outdoor unit can be connected with a pipe.
CAUTION
•Install the indoor unit away from any interfering sources such as radio, computer, stereo
equipment and also select the place where the electrical wiring work can be possible.
- Especially keep the unit at least 3m(118-1/8") away from the electrical equipment in an
area electromagnetic waves generated and install the protection tube to protect the main
power cable and communication cable.
- Make sure that there is no equipment electromagnetic waves generate. If not, malfunction of the
control system may occur due to the effect of the electromagnetic wave. (For example: The remote
control sensor of the indoor unit may not be received well of electronic lighting style fluorescent
lamps, such as fluorescent lamps are in the same space when using a remote control.)
•Make sure to install the outdoor unit in a safe place where snowfall will not be obstructed. The frame
should be installed in a place where the air inlet and heat exchanger of the unit are not buried in the snow.
•Ventilation system will be better installed for the case of the refrigerant leakage in a closed
room even if R410A is nonpoisonous and noninflammable refrigerant.
•Install the railing around the outdoor unit to prevent falling when the unit is installed at high
place of roof on the building.
•Avoid installing the units in places such as an exhaust pipe and ventilating opening exposed to corrosive
gas, oxides of sulfur, ammonia gas or sulfur gas herbicides. (These places need additional anticorrosive
treatments. Please contact manufacture to avoid corroding copper pipes or soldered parts)
• According to the condition of power supply, electric noise or unstable voltage can occur malfunction of
electric parts or control system. (At the ship or places using power supply from electric generator… etc)
08_ preparing the installation
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SPACE REQUIREMENTS
• The space suggested below is based on operating condition of outdoor temperature of 35°C(95°F).
If operating condition of outdoor temperature is higher than 35°C(95°F), try to have more space.
• Make sure to clear a passage for a person and air flow.
• Observe the clearances and dimensions as seen below when installing the outdoor unit.
• If you install several outdoor units at the same place, observe the space for ventilation and free airflow.
• If the space for ventilation is insufficient, the air conditioner may not generate performance designed.
Keep in mind that SAMSUNG logo is located on the front side of outdoor unit.
300(12) or more[S2]
Front
Unit : mm(inch)
Wall height unrestricted
10(3/8)more
10(3/8) or more
ENGLISH
Single installation
300(12) or more
500(20) or more[S1]
200(8) or more
Group installation
Unit : mm(inch)
300(12) or
more[S2]
Front
10(3/8) or more
20(3/4) or more
Wall height unrestricted
300(12) or more
10(3/8) 500(20) or
more more[S1]
20(3/4) or more
20(3/4) or more
Front
200(8)
or more
20(3/4) or more
300(12)
or more
Front
600(24) or more
Front
10(3/8) or more
10(3/8)
or more
500(20)
20(3/4) or more
or more
10(3/8) or
more
Front
400(16)
or more
300(12)
or more
Front
500(20) or more
Front
10(3/8)
or more
300(12)
or more
20(3/4) or more
Note
500(20)
1500(60)
Unit : mm(inch)
Front wall height
1500(60) and less
Rear wall height
Side wall height
If the height of the wall
exceeds the above value,
more space should be
added to the front and
rear space individually.
500(20) and less
Height unrestricted
Front : S1+h1/2,
Rear : S2+h2/2
• The installation space mentioned above is minimum suggested clearance.
•To secure enough service space and performance of system, take account of more sufficient
space.
•The required minimum space between outdoor units for service and performance of system
is at least 100mm(4").
preparing the installation _09
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preparing the installation
MOVING THE OUTDOOR UNIT
• Select the moving route in advance.
• Secure the strength of the carrying to resist against the weight of the outdoor unit while moving.
• Do not slant the product more than 30˚(86°F) when carrying it.
(Do not lay the product down sideways.)
• The surface of the heat exchanger is sharp. Be careful not to be get injury while moving and installing.
When moving with a crane or straps
•Fasten the wire rope as seen in the picture.
•To protect damage or scratches, insert a piece of cloth between the outdoor unit and the wire rope.
Wire rope/straps
Plate protection
cloth
Outdoor unit leg
When moving with a fork lift
•Insert the fork into the bottom of the outdoor unit carefully.
•Be careful that the fork does not damage the outdoor unit.
Fork part
Fork lift
Detaching Fasteners
• Open the bottom cabinet with screw driver.
The compressors are fastened with nuts in 4 places of only
following models.
RD125VRXF
• Detach nut washer, washer and stopper nut from compressors with a tool.
Nut washer
Washer
Remove
Stopper nut
• Refasten the nut washer only.
CAUTION
•Pay your attention not to touch the copper pipes as detaching the fasteners.
•The stopper nut and washer should be removed. If this work is not conducted correctly,
the outdoor unit could vibrate and make noise.
10_ preparing the installation
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INSTALLING THE OUTDOOR UNIT
CAUTION
ENGLISH
• Install the outdoor unit 200mm(8") higher than the base surface and install the drain hole to connect the
pipe to the drainage.
• The concrete foundation should be 1.5 times larger than bottom of the outdoor unit.
• Condensed water may be generated in heating operation. Pay attention to waterproof and drainage of
the concrete foundation where the outdoor unit is installed.
(An ice may form on the base surface in winter.)
• It is necessary to install wire mesh or steel bar when outdoor units are installed at soft foundation.
• When installing multiple outdoor units at the same place, install the H beam on the concrete foundation.
(When installing a number of outdoor unit, you can install it on the concrete foundation.)
• Install the H beam[150mm(6") x 150mm(6") x t10(3/8") : basic specification] or vibration absorption
frame to jut out from the concrete foundation.
• After installing the H beam or vibration absorption frame, apply corrosion protection.
• Install a square pad[t=20mm(3/4") or more] or vibration absorption frame to prevent vibration of the
outdoor unit delivering to the base surface when installing the concrete for the outdoor unit.
• Place the outdoor unit on the H beam or vibration absorption frame and fix it with the bolt, nut and
washer. (The bearing force is more than 3.5kN)
•Do not install the outdoor unit on a wood palette.
• Fix the outdoor unit securely to the base surface with anchor bolts.
•The manufacturer is not responsible for the damage occurred by not keeping standard of the
installation.
Base mount construction
Drain hole
200 or more
(Unit : mm)
Install the outdoor unit
horizontally
200 or more
on the ground
200 or more
< When installing on the ground >
< When installing on the roof >
Outdoor unit installation
Concrete
foundation
200 or more
H beam or vibration
absorption frame
Anchor bolt
Nut, Spring washer
200 or more
50 or more
preparing the installation _11
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preparing the installation
INSTALLING THE OUTDOOR UNIT
Outdoor unit base mount and anchor bolt position
Unit:mm(inch)
A
765(30-1/8)
745(29-5/16)
B
Model
RD075VRX
RD100VRX
A
880(34-5/8)
1200(47-1/4)
B
738(29)
1058(41-5/8)
RD125VRX
Anchor bolt
CAUTION
• When tightening the anchor bolt
- Tighten the rubber washer to prevent the outdoor unit bolt connection part from corroding.
Rubber washer
• When connecting the pipes
- Check the strength of the roof to install the outdoor unit and make sure to have a waterproof
floor of the roof.
- Make sure that a proper drainage system has been put in place around the outdoor unit.
- To protect the internal components of the outdoor unit, secure the pipework entrance to the
unit.
Close the part.
(When the pipe is projected to the front side)
Liquid side pipe
Gas side pipe
Anchor specifications
c
b
m
Size
M10
Diameter of Anchor
drill bit (a) length (b)
14mm(1/2")
75mm(3")
Sleeve
length (c)
Insert
depth
Fastening
torque
40mm(1-1/2")
50mm(2")
30N·m
a
INSTALLING DUCT FOR HORIZONTAL EXHAUST DISCHARGE
• It is necessary to install an air-discharge duct(field supply) to direct exhaust from the fan horizontally if it
is difficult to provide a minimum space of 2m(6'7") between the air-discharge duct outlet and a nearby
obstacle as shown in the figure.
Discharged air
Upper floor
Louver
Discharged air
Suction air
Ex) Balcony
Ex) Mechanical room
12_ preparing the installation
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INSTALLING THE OUTDOOR UNIT IN HARSH ENVIRONMENTS
• In abnormally harsh environments such as cold and/or windy areas, sufficient countermeasures to
guard against excessive wind and snow should be taken to ensure the unit’s correct operation.
• Snow-proof duct(field supply) should be fitted to the unit and direct exposure to the wind should be
avoided as much as possible.
• When the unit is expected to operate in cooling mode in condition under 10°C(50°F), in snowy areas,
in environments subject to strong winds or rain, install air inlet and outlet ducting as shown below.
ENGLISH
Note
The following problems may occur if proper countermeasures are not taken.
• The fan in the outdoor unit may stop running, causing the unit to be damaged.
• There may be no air flow.
•The condenser pressure may drop because of strong wind, and the indoor unit may freeze.
When installing ducts
•Height of frame/foundation for snow damage prevention shall be twice as high as expected
snowfall, width of frame/foundation shall not exceed that of the unit.
•The frame/foundation shall be made of angle steel, etc., and designed so that snow and wind
slip through the structure. (If frame base is too wide, snow will be accumulated on it.)
•Install unit so that wind will not directly lash against openings of inlet and outlet ducts.
Unit : mm(inch)
782(30-3/4)
557(21-7/8)
1207(47-1/2)
1318(51-7/8)
112(4-3/8)
252 417
(9-7/8) (16-3/8)
2320(91-3/8)
871(34-1/4)
560(22)
1200(47-1/4)
871(34-1/4)
560(22)
668(26-1/4)
532(21)
880(34-5/8)
220 1050(41-3/8)
(8-5/8)
1588(62-1/2)
2256(88-7/8)
220 880(34-5/8)
(8-5/8) 1050(41-3/8)
1588(62-1/2)
2256(88-7/8)
105(4-1/8)
220 880(34-5/8)
(8-5/8) 1049(41-1/2)
2227(87-11/16)
668(26-1/4)
532(21)
560(22) 880(34-5/8) 560(22)
765(30-1/8) 550(21-5/8)
<RD075/100VRX series>
CAUTION
105(4-1/8)
220 880(34-5/8)
(8-5/8) 1049(41-1/4)
2226(87-10/16)
2000(78-3/4)
112(4-3/8)
252 417
(9-7/8) (16-3/8)
557(21-7/8)
1207(47-1/2)
1318(51-7/8)
1100(43-1/4)
765(30-1/8) 550(21-5/8)
<RD125VRX series>
• The frame/foundation should be higher than expected snowfall.
• The foundation must be solid and the unit must be secured with anchor bolts.
• Be sure to install unit in a place strong enough to withstand its weight.
•When installing on a roof subject to strong wind, countermeasures must be taken to prevent the
unit from being overturned.
• Be sure to install unit in a place strong enough to withstand its weight.
preparing the installation _13
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2011-11-11 오후 4:18:14
preparing the installation
INSTALLING THE DRAIN PIPE
• Insert the provided drain plug at the 2 sides of the bottom of the unit and then connect the drain pipe.
• Install the drain pipe at the rear side of the unit to get a sufficient space for repairs and service.
Outdoor unit
(Rear side)
Drain plug
Drain pipe
When installing single outdoor unit
When installing multiple outdoor units
Outdoor unit
(Rear side)
Outdoor unit
(Rear side)
Outdoor unit
(Rear side)
Open to air
Drain
plug
More than
1/50 slope
Outdoor unit
(Rear side)
Open to air
Drain
plug
More than 1/50 slope
• Do not install a trap on the pipe.
And, install the drain pipe horizontally with a slope of 1/50 or more.
• Insulate the drain pipe and drain plug with insulation over 10t.
• Install heating device to the drain pipe to prevent it from being frozen.
Install the safety equipment for a heating appliance.
14_ preparing the installation
DVM PLUS3 HR_IM_E_32805-2.indd 14
2011-11-11 오후 4:18:14
installing the unit
REFRIGERANT PIPING WORKS
•When installing, make sure there is no leakage. When recovering the refrigerant, ground the compressor first before removing the
connection pipe. If the refrigerant pipe is not properly connected and the compressor works with the service valve open, the pipe inhales
the air and it makes the pressure inside of the refrigerant cycle abnormally high. It may cause explosion and injury.
ENGLISH
• The piping length between the outdoor unit and the indoor unit may not exceed the allowable piping length.
• The pressure of the R410A is high. Use only certified refrigerant pipe and follow the installation method.
• Use clean refrigerant pipe which there is no harmful ion, oxide, dust, iron content or moisture inside pipe.
• Use tools and accessories fit on R410A.
Tool
Work
If compatible with conventional tool
Pipe cutter
Flaring tool
Pipe cutting
Pipe flaring
Apply refrigerant oil on flared
part
Connect flare joint with pipe
Pipe bending
Inhibition of oxidization
Pipe brazing
Refrigerant pipe work
Refrigerant oil
Torque wrench
Pipe bender
Nitrogen gas
Brazing tool
Gauge manifold
Air tightening test
Refrigerant charging hose
Air tightening test ~ additional
refrigerant charging
Vacuum pump
Vacuuming unit
Electronic scale
Gas leak detector
Flare joint
Use indoor unit’s only
Vacuuming, charging and
checking operation
Compatible
Ester series oil, alkali
benzene oil or synthetic oil
Compatible
Exclusive
Use one which has a check
valve and 5 torr degree of
vacuum.
Compatible
Exclusive
Gas leak test
Selecting the refrigerant pipe
Main pipe First branch Equivalent pipe length between outdoor
joint
unit and the farthest indoor unit
 Main pipe : from outdoor unit to the first branch joint.
 Select the main pipe of outdoor units with the following
table.
Outdoor
Pipe size (O.D)
Oil balancing
unit
pipe size
Liquid
Gas
H.P. Gas
Ton HP
mm inch mm inch mm inch mm inch
6
8
10
12
14
16
18
20
22
24
26
28
30
7.5
10
12.5
15
17.5
20
22.5
25
27.5
30
32.5
35
37.5
Ø9.52 Ø3/8
Ø19.05 Ø3/4 Ø15.88 Ø5/8
Ø22.23 Ø7/8 Ø19.05 Ø3/4
Ø12.70 Ø1/2
Ø22.23 Ø28.58
Ø28.58 Ø1 1/8
Ø15.88 Ø5/8
Ø28.58 Ø1 1/8
Ø19.05 Ø3/4 Ø34.93 Ø1 3/8
Ø34.93 Ø1 3/8
Ø6.35
Ø1/4
 Select the main pipe of outdoor units with the following table
when if the farthest indoor unit’s length is over 90m(295').
Outdoor
Pipe size (O.D)
Oil balancing
unit
pipe size
Liquid
Gas
H.P. Gas
Ton HP
mm inch mm inch mm inch mm inch
6
8
10
12
14
16
18
20
22
24
26
28
30
7.5
10
12.5
15
17.5
20
22.5
25
27.5
30
32.5
35
37.5
Ø12.70 Ø1/2
Ø22.23 Ø7/8 Ø19.05 Ø3/4
Ø22.23 Ø7/8
Ø28.58 Ø1 1/8
Ø15.88 Ø5/8
Ø28.58 Ø1 1/8
Ø19.05 Ø3/4
Ø34.93 Ø1 3/8
Ø6.35
Ø22.23 Ø7/8
Ø1/4
Ø34.93 Ø1 3/8
Ø41.28 Ø1 5/8
installing the unit _15
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2011-11-11 오후 4:18:15
installing the unit
REFRIGERANT PIPING WORKS
Pipe selection for DVM PLUS III HR
10Ton
8Ton
Outdoor unit connection pipe size : (A1), (A2), (A3)
A1 : Select the pipes according to the outdoor
unit capacity with following table.
A2 : Select the pipes according to sum of
outdoor unit capacities behind the outdoor
joint with following table.
A3 : Select the main pipe of outdoor units with
the following table.
8Ton
(A1)
(A1)
(A1)
(A2)
(E)
Outdoor Unit
Liquid
mm inch
(B)
Ton
HP
Pipe Size (O.D mm)
Gas H.P. Gas
Ton HP Mark Liquid
mm inch mm inch mm inch
6
8
10
12
14
16
18
20
22
24
26
28
30
7.5
Ø9.52
10
12.5
Ø12.70
15
17.5
20 Ø15.88
22.5
25
27.5
30
Ø19.05
32.5
35
37.5
(A3)
(F)
(D)
(C)
• Example) 26Ton of compact
combinations
8
8
10
18
26
10
10
12.5
22.5
32.5
(A1)
(A1)
(A1)
(A2)
(A3)
Ø9.52
Ø9.52
Ø12.70
Ø15.88
Ø19.05
Ø3/8
Ø3/8
Ø1/2
Ø5/8
Ø3/4
Ø22.23
Ø22.23
Ø28.58
Ø28.58
Ø34.93
Ø7/8
Ø7/8
Ø1 1/8
Ø1 1/8
Ø1 3/8
Ø19.05
Ø19.05
Ø22.23
Ø28.58
Ø28.58
Ø3/4
Ø3/4
Ø7/8
Ø1 1/8
Ø1 1/8
Ø3/8
Pipe Size (O.D)
Gas
H.P. Gas
mm inch mm inch
Ø19.05
Ø22.23
Ø3/4
Ø7/8
Ø1/2
Ø15.88
Ø19.05
Ø5/8
Ø3/4
Ø22.23
Ø7/8
Ø28.58 Ø1 1/8
Ø5/8
Ø28.58 Ø1 1/8
Ø3/4
Ø34.93 Ø1 3/8
Pipe size between branch joints : (B)
Select the pipe size according to the capacity sum of
indoor units which are connected below this pipe.
Pipe Size (O.D)
Gas
H.P. Gas
mm inch mm inch
Ø15.88 Ø5/8
Ø15.88 Ø5/8
Ø19.05 Ø3/4
Ø22.23 Ø7/8 Ø19.05 Ø3/4
Ø28.58 Ø1 1/8
6~20MBH
24~48MBH
52MBH
76MBH
96MBH
Liquid & Low Gas Pipe MXJ-T3819
High gas pipe
Liquid
& Low
pressure
gas
Y-joint
High
pressure
gas
Y-joint
Ø34.93 Ø1 3/8
12 ~ 30 Ton
Model
Capacity of
outdoor unit
MXJ-YA2512
6, 8, 10 Ton
MXJ-YA2812
12 Ton
MXJ-YA2815 14, 16, 18, 20 Ton
MXJ-YA3119 22, 24, 26, 28 Ton
MXJ-YA3819
30 Ton
Model
Capacity of
outdoor unit
MXJ-YA1500
6 Ton
MXJ-YA2500
8, 10, 12 Ton
MXJ-YA3100
14~30 Ton
 Branch joint (F)
Select the pipe size according to the
capacity sum of indoor units which are
connected below this pipe.
Model
Liquid
& Low
pressure
gas
Y-joint
MXJ-YA1509*
MXJ-YA2512*
MXJ-YA2812*
MXJ-YA2815*
MXJ-YA3119*
MXJ-YA3819*
High
pressure
gas
Y-joint
Model
Ø28.58 Ø1 1/8
Ø34.93 Ø1 3/8
MXJ-T3100
 First branch joint (E)
Select branch joint according to the outdoor
unit’s capacity.
Ø22.23 Ø7/8
Pipe size between branch joints and
indoor unit (C)
Select the pipe size according to the indoor
unit’s capacity.
Indoor unit's
capacity
 Branch joint of outdoor unit’s multi
connection (D)
Outdoor Multi
Capacity of
Model
Connection
outdoor unit
Ø34.93 Ø1 3/8
*A1 : Pipes to the outdoor unit (Liquid, Gas, High pressure Gas)
*A2 : Pipes between outdoor joint kits (Liquid, Gas, High
pressure Gas)
*A3 : Main pipes (Liquid, Gas, High pressure Gas)
Total Indoor
unit's
Liquid
capacity mm inch
51MBH 
51~79 MBH Ø9.52 Ø3/8
79~96 MBH
96~138MBH
Ø12.7 Ø1/2
138~160MBH
160~240MBH Ø15.88 Ø5/8
240~336MBH
Ø19.05 Ø3/4
336MBH 
Branch joint : (D), (E), (F)
Total Indoor
unit's Capacity
51 MBH 
51~138 MBH
138~160 MBH
160~240 MBH
240~336 MBH
336MBH 
Total Indoor
unit's Capacity
MXJ-YA1500
80 MBH 
MXJ-YA2500
80~240 MBH
MXJ-YA3100
240 MBH 
Pipe Size (O.D)
Liquid
Gas
mm
inch
mm
inch
Ø 6.35
Ø 9.52
Ø 9.52
Ø 9.52
Ø 9.52
Ø 1/4
Ø 3/8
Ø 3/8
Ø 3/8
Ø 3/8
Ø 12.70
Ø 15.88
Ø 15.88
Ø 19.05
Ø 22.20
Ø 1/2
Ø 5/8
Ø 5/8
Ø 3/4
Ø 7/8
16_ installing the unit
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2011-11-11 오후 4:18:16
Additional refrigerant charging
• Additional refrigerant has to be charged according to the length and size of
liquid pipe.
Liquid pipe size
(O.D)
Ø12.70(1m/3.3')
Ø19.05(10m/32.8')
Ø15.88(10m/32.8')
Ø15.88(10m/32.8')
MCU-X4NEF1
Ø9.52
(10m/32.8')
MCU-X4NEF1
Ø6.35(10m/32.8')
Ø6.35(15m/49.2')
Ø9.52(10m/32.8')
Ø9.52(15m/49.2')
Ø9.52(18m/59')
Ø9.52
(15m/49.2')
Ø9.52(15m/49.2')
mm
inch
Ø6.35
Ø1/4
0.020
0.0134
Ø9.52
Ø3/8
0.060
0.0403
Ø12.70
Ø1/2
0.125
0.0840
Ø15.88
Ø5/8
0.180
0.1210
Ø19.05
Ø3/4
0.270
0.1814
Ø22.23
Ø7/8
0.350
0.2352
Outdoor unit
Factory charging
kg
lbs
RD075VRXFA
6.5
14.330
RD100VRXFA
7.5
16.535
RD125VRXFA
9.0
19.824
Additional refrigerant charging of MCU kit
(kg/unit)
(Ibs/ft)
Additional refrigerant charging of MCU is 0.5kg for every
MCU kit
0.5
1.10
Additional refrigerant charging
of distribution kit (kg/m)
Regardless of the liquid pipe size,
additional refrigerant charging is
0.01kg(0.0067lbs) per meter(ft) after
distribution kit
(kg/unit) (Ibs/ft)
0.01
0.0067
ENGLISH
Ø12.70(5m/16.4')
Additional
refrigerant
charging
kg/m
lbs/ft
Remarks
For wall-mounted &
ceiling indoor unit
 Example of additional refrigerant charging.
Pipe length is as below.
Liquid pipe size(O.D.) Total piping length
mm
inch
m
ft
Ø6.35
Ø9.52
Ø12.70
Ø15.88
Ø19.05
Ø22.23
Ø1/4
Ø3/8
Ø1/2
Ø5/8
Ø3/4
Ø7/8
Ø6.35
Ø9.52
Ø12.70
Ø15.88
Ø19.05
Ø22.23
Ø1/4
Ø3/8
Ø1/2
Ø5/8
Ø3/4
Ø7/8
Pipe length after
MCU distribution
kit (m)
2 Ea
20 (2+18)
 Additional refrigerant = 25x0.02+83x0.06+6x0.125+20x0.18+1x0.27+(2+18)
x0.01+2x0.5=13.73 kg
CAUTION
•Total refrigerant amount of the system must be less then 100kg(220lbs). If total refrigerant
amount of system is over 100kg(220lbs) more, the system has to be divided into smaller system,
each containing less than 100kg(220lbs).
Equivalent length calculations
 Equivalent length calculation method
Equivalent length = actual pipe length(m) + number of ‘Y-joint’×0.5(m)+number of ‘Header joint’×1.0(m)+
number of elbows×equivalent length of each elbow
Elbow
Pipe size(O.D.)
mm
inch
Ø9.52
Ø12.70
Ø15.88
Ø19.05
Ø22.23
Ø25.40
Ø28.58
Ø31.75
Ø34.93
Ø38.10
Ø41.30
Ø44.45
Ø50.80
Ø3/8
Ø1/2
Ø5/8
Ø3/4
Ø7/8
Ø1
Ø1-1/8
Ø1-1/4
Ø1-3/8
Ø1-1/2
Ø1-5/8
Ø1-3/4
Ø2
DVM PLUS3 HR_IM_E_32805-2.indd 17
Equivalent length
m
ft
0.18
0.20
0.25
0.35
0.40
0.45
0.50
0.55
0.58
0.60
0.70
0.75
0.80
0.59
0.66
0.82
1.15
1.31
1.48
1.64
1.80
1.90
1.97
2.30
2.46
2.62
Type
Equivalent length
m
ft
Y joint
0.5
1.64
Header joint
1.0
3.28
installing the unit _17
2011-11-11 오후 4:18:17
installing the unit
REFRIGERANT PIPING WORKS
Keeping refrigerant pipe clean and dry
To prevent foreign materials or water from entering the pipe, it is important to keep the refrigerant
pipe clean and dry and to seal it during installation.
Exposure place
Outside exposure
Exposure time
Sealing type
Longer than one month
Pipe pinch
Shorter than one month
Taping
-
Taping
Inside exposure
Brazing the pipe
•
•
•
•
Make sure that there is no moisture inside the pipe.
Make sure that there are no foreign materials and impurities in the pipe.
Make sure that there is no leak.
Make sure to follow the instruction when brazing the pipe.
The use of Nitrogen gas
1.Use Nitrogen gas when brazing the pipes as shown
in the picture.
2.If you do not use Nitrogen gas when brazing the
pipes, oxide may form inside the pipe. It can cause
the damage of the compressor, valves.
3.Adjust the flow rate of the Nitrogen gas with a pressure
regulator to maintain 0.05m3/h(1.77ft3/h) or less.
Brazing part
1/4˝ copper pipe
Nitrogen gas
Pressure regulator
Stop valve
Taping
Flowmeter
Direction of the pipe when brazing
• Performing the brazing of the pipe should be headed downward or horizontally.
Downward
Note
Side
Upward
Avoid brazing the pipe upward.
18_ installing the unit
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2011-11-11 오후 4:18:17
Cutting or Flaring the pipes
To prevent foreign materials or water from entering the pipe, it is important to keep the refrigerant pipe clean
and dry and to seal it while installing.
1. Make sure that you prepared the required tools.
(pipe cutter, reamer, flaring tool and pipe holder)
Oblique
Rough
Burr
ENGLISH
2. If 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.
3. To prevent a gas leak, remove all burrs at the cut edge of the pipe using a reamer.
4. Carry out flaring work using flaring tool as shown below.
Flaring tool
A
York
Flaring bar
Flaring bar
Clutch type
Wing nut type
Outer diameter
[mm(inch)]
Copper pipe
Flare joint
Copper pipe
Flare tool for
R410A clutch type
A[mm(inch)]
Conventional flare tool
Clutch type
Wing nut type
ø6.35(ø1/4)
0~0.5(0~0.776)
1.0~1.5(0.039~0.059) 1.5~2.0(0.059~0.079)
ø9.52(ø3/8)
0~0.5(0~0.776)
1.0~1.5(0.039~0.059) 1.5~2.0(0.059~0.079)
ø12.70(ø1/2)
0~0.5(0~0.776)
1.0~1.5(0.039~0.059) 1.5~2.0(0.059~0.079)
ø15.88(ø5/8)
0~0.5(0~0.776)
1.0~1.5(0.039~0.059) 1.5~2.0(0.059~0.079)
5. Check if you flared the pipe correctly. There are some examples of incorrectly flared pipes
below.
Inclined
Damaged
surface
Cracked
Uneven
thickness
installing the unit _19
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2011-11-11 오후 4:18:17
installing the unit
REFRIGERANT PIPING WORKS
Aligning the pipes
• Check that the flaring is properly made.
• Align the center of the piping and sufficiently tighten the flare nut with fingers. Finally, tighten
the flare nut with torque wrench until the wrench clicks. When tightening the flare nut with
torque wrench, ensure the direction for tightening follows the arrow on the wrench.
• Make sure to use ester oil to coat the flare connection section.
Pipe
Flare joint
Flare dimension [mm(inches)]
ø6.35(ø1/4)
145~175
8.70 ~ 9.10(0.343~0.358)
ø9.52(ø3/8)
333~407
12.80 ~ 13.20(0.504~0.520)
ø12.70(ø1/2)
505~615
16.20 ~ 16.60(0.638~0.654)
ø15.88(ø5/8)
630~769
19.30 ~ 19.70(0.760~0.776)
Flare shape [mm(inches)]
45° ± 2°
Outer diameter Connection [mm(inch)]
torque (kgf•cm)
90° ± 2°
Flare connection section
R 0.4~0.8(0.0157~0.0314)
Caution for connecting the pipe
CAUTION
•Blowing Nitrogen gas should be done when brazing the pipe.
•Make sure to use the provided flare joint.
•Make sure that there are any cracks on the bent pipe.
•Do not fasten the flare joint with excessive strength.
•Use ester oil to coat the flare connection section to prevent refrigerant leak.
R410A is a high pressure refrigerant therefore there is a risk of refrigerant leakage
if the flare connection is not coated by ester oil.
20_ installing the unit
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2011-11-11 오후 4:18:18
Free piping & wiring directions
DVM PLUS III HR is easy to install as its piping can be connected from front, right, left and
bottom side. Wiring hole (Conduits) adds convenience as it allows power and communication
lines to be connected in various ways and directions.
ENGLISH
Left side
Right side
Front side
Caution for using knock-out hole
CAUTION
•Make sure not to damage the exterior of the outdoor unit.
•Remove all burrs at the edge of the knock-out hole and apply the paints it to prevent
rust.
•Use a cable tube and bushing to prevent a cable from being damaged when passing
through a knock-out hole.
Knock-out hole
installing the unit _21
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2011-11-11 오후 4:18:18
installing the unit
REFRIGERANT PIPING WORKS
Connecting the outdoor unit pipe
Heat Pump
Working process
Single
installation
Connection from front side
Connection from bottom at the
left/right side
• First, remove the cover from unit.
• Separate the knock-out hole at the
• Separate the knock-out hole to use.
bottom side of the unit and install
If the hole is open, small animals such
the  pipe.
as squirrels and rats may get into the
• After installing and insulating the pipe,
unit through the hole and the unit may
close up the remaining gap. If the gap is
be damaged.
remain open, small animals such as rats
• Fix the pipe cover of bottom side and fix
and squirrels may get inside the unit and
the pipe cover of upper side thereafter.
cause damage to the unit.
Gas side
pipe
Gas side
pipe
Liquid side
pipe
Liquid side
pipe
Knock-out hole
High pressure gas side pipe
High pressure gas side pipe
Combination
installation
Gas side
pipe
Gas side
pipe
Liquid side
pipe
Oil
balancing
valve
High pressure gas side pipe
Liquid side
pipe
Knock-out hole
High pressure gas side pipe
Oil
balancing
valve
Caution for connecting the pipe
CAUTION
•When connecting the pipe to the unit, the unit may get damaged by a welding fire and a flame.
Use a flame proofing cloth to protect the unit from a welding fire or flame.
Ambient air temperature sensor for detecting outside temperature is located on the left side of
the welding part. Make sure not to damage the temperature sensor when welding it.
•The O-ring and Teflon packing inside service valve may get damaged by a welding fire. Wrap the
bottom side of the service valve with a wet cloth and weld it as shown above. Make sure not to
interrupt the welding with the drops of the wet cloth.
•The connecting pipes of liquid side and gas side should not contact each other.
Vibration may cause a damage to the pipes.
22_ installing the unit
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2011-11-11 오후 4:18:18
Piping works among outdoor units
• The additional branch joints are needed for module installation of the outdoor units.
• When outdoor units are installed in module, there is no designation of outdoor unit’s location
according to capacity.
• The connected piping should be positioned at the same level with pipe cover hole or lower.
Cautions
Correct piping work
Wrong piping work
ENGLISH
The refrigerant piping
should be the
same level or lower
than connecting
position of piping to
outdoor units.
Piping work should
be run with side
direction for better
uniform distribution
of refrigerant and oil
like next diagram.
Outdoor joint kits
should be installed in
a horizontal direction,
even it is a low
pressure pipe.
Horizontal length
= over 100mm(3-7/8")
Minimum 100mm(3-7/8")
200~300mm
(7-3/4~11-3/4")
When the piping
length between
outdoor and branch
joints is 2m(6'7") or
more, a vertical trap
has to be installed like
right diagram.
Less than 1m(3'3")
2m(6'7") or over
2m(6'7") or over
installing the unit _23
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2011-11-11 오후 4:18:20
installing the unit
REFRIGERANT PIPING WORKS
The examples of the refrigerant pipe installation
Example of piping layouts for DVM PLUS III HR
X4NEF1
X4VEF1
X4NEF1
X4NEF1
Using Y- joint
X6NEF1
X4NEF1
X4NEF1
24_ installing the unit
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2011-11-11 오후 4:18:22
 Heat Recovery model
Branch with Y-joint
Using MCU
only
ENGLISH
Using Y- joint
and MCU
MCU-X4VEF1
MCU-X4WEF1
Items
Max.
piping
length
Level
difference
Outdoor ~
Outdoor unit
Outdoor ~
Indoor unit
Indoor ~
Indoor unit
Outdoor ~
Outdoor unit
MCU~MCU
Allowable
length after
branch
Examples
Piping
(Equivalent
piping)
200m(656')
220m(722')
Total
piping
1000m(3281')
Piping
Remarks
Using MCU only
a+b+c+d+e+f+g ≤ 200m(220m)/256'(722')
Using Y-joint and MCU
a+g+m ≤ 200m (220m)/656'(722')
Using MCU only
a+b+c+d+e+f+g ≤ 1000m/3281'
a+b+c+d+e+f+g+p+h+i+j+k+m
≤ 1000m/3281'
Using Y-joint and MCU
10m(33')
r ≤ 10(33'), s ≤ 10(33'), t ≤ 10m(33')
Equivalent
piping
13m(43')
r ≤ 13(43'), s ≤ 13(43'), t ≤ 13m(43')
Piping
50m / 40m*1)
(164'/131')
H1 ≤ 50/40m(164'/131')
Piping
15m(49')
H2 ≤ 15m(49')
Piping
5m(16')
H3 ≤ 5m(16')
Piping
15m(49')
The first
branch ~
the farthest
Indoor unit
Piping
45m(148')
MCU(Included EEV)
Piping
20m(66')
Equivalent pipe
length.
Y joint : 0.5m,
Header : 1m,
MCU : 1m
H4 ≤ 15m(49')
Using MCU only
45m(148')
Using Y-joint and MCU
g+m ≤ 45m(148')
m ≤ 20m(66')
*1) As an outdoor unit is located in a lower position than indoor unit, level difference is 40m.
installing the unit _25
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installing the unit
REFRIGERANT PIPING WORKS
Installing the branch joints
 Y-joint
•Install the Y-joint ‘horizontally’ or ‘vertically’.
 Install horizontally
 Install vertically
Note
• When using A~J type of Y-joint, connect the Y-joint to the pipe with provided reducer.
•When using K~Z type of Y-joint, connect the Y-joint to the pipe by cutting the inlet of the
Y-joint or provided reducer properly.
10~15mm(3/8~5/8")
or more
CAUTION
Keep a minimum distance of 500mm(19-1/2") or more before
connecting a branch joint.
To other branch
joint or indoor unit
Rear
Pipe
Reducer
Pipe
Reducer
Rear
Front
To outdoor unit
Main pipe
 Install the Y-joint within ±15° on
500mm(19-1/2")
or more
the horizontal or on the vertical.
26_ installing the unit
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Installing the branch joints
 Header joint
1. Select the reducer fitted on the diameter of the pipe.
Reducer
Pipe
Reducer
Pipe
Pipe
To indoor unit
To indoor unit
To outdoor unit
< Liquid side >
< Gas side >
2. Braze the pipes ends with caps if the number of connected indoor unit is fewer than header
joint ports.
Connection
in order
Connection
in order
Reducer
< Liquid side >
CAUTION
ENGLISH
To outdoor unit
Blocked the port of
header joint
Blocked the port of
header joint
Reducer
< Gas side >
•When using A~J type of header joint, connect the header joint to
the pipe with provided reducer.
•When using K~Z type of header joint, connect the header joint to
the pipe by cutting the provided reducer properly.
•Connect the header joint in order respecting the number of the indoor unit.
•Connect the indoor unit as the highest capacity comes first.
10~15mm(3/8-5/8")
or more
3. Install the header joint horizontally.
- Install the header joint horizontally so that it is not facing down.
Reducer Branch joint
±10°
or less
The
horizon
Pipe
The
horizon
±15°
or less
< Liquid side >
Note
The horizon
±15°
or less
The horizon
±10°
or less
The
horizon
< Gas side >
Incorrect
installation of Y-joint and header joint cause poor oil and refrigerant distribution
between indoor units.
It may decrease the system’s performance or cause compressor failure.
installing the unit _27
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installing the unit
REFRIGERANT PIPING WORKS
 Outdoor joint
 Installation of outdoor joint
Oil balancing
pipe
Gas pipe Liquid pipe High pressure gas pipe
Do not install the outdoor
joint like the above diagram.
 Use the attached reducer properly according to the selected pipe size.
To other outdoor unit
To other outdoor
joint or outdoor unit
Pipe
Reducer
Reducer at the
liquid side
Pipe
To other outdoor joint or
Y-joint of the main pipe
<Liquid pipe>
To other outdoor unit
Pipe
To other outdoor
joint or outdoor unit
Reducer
To other outdoor unit
Reducer
Pipe
To other outdoor
joint or outdoor unit
To other outdoor joint or
Y- joint of the main pipe
<Gas pipe, High pressure gas pipe>
Note
• When using A~J type of Outdoor joint, connect the Outdoor joint to the pipe with provided reducer.
•When using K~Z type of Outdoor joint, connect the Outdoor joint to the pipe by cutting
provided reducer properly.
10~15mm(3/8-5/8") or more
To other outdoor unit
Pipe
To the other
outdoor joint
or outdoor unit
Pipe
T-joint (Field supply)
To the other outdoor joint
or outdoor unit
<T-joint for oil balancing>
Note
Oil balancing pipe
 Install the oil balancing pipe without T-joint when
connecting 2 outdoor units.
<Oil balancing pipe>
Keep
in mind that T-joint must be installed horizontally to have best oil return to each
compressor.
28_ installing the unit
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Installing MCU
Model
MCU-X6NEF1
MCU-X4NEF1
MCU-X4VEF1 MCU-X4WEF1
Quantity of the connectable
indoor units
Up to 6 units
Up to 4 units
Up to 4 units
Up to 4 units
The maximum capacity of
the connectable indoor units
152MBH 
152MBH 
152MBH 
152MBH 
The exterior of MCU
Note
Not included
Cannot connect
the indoor unit
that EEV is not
included in.
Included
Included
Can connect the
indoor unit that
EEV is not included
in.(Below 12MBH)
Can connect the
indoor unit that
EEV is not included
in.(Over 18MBH)
ENGLISH
Built-in EEV
Not included
Cannot connect
the indoor unit
that EEV is not
included in.
•MCU-X4VEF1/MCU-X4WEF1 is supplied with EEV bypass valve located on the front side of
MCU being opened for indoor unit with EEV.
•To connect the indoor units not having EEV, close EEV bypass valve.
Connecting the pipe
From outdoor unit
Gas pipe connection (Flange)
High pressure gas pipe connection (Brazing)
Liquid pipe connection (Flare)
To indoor unit
Liquid pipe to indoor unit
CAUTION
Gas pipe to indoor unit
•Use the provided installation pattern when installing the MCU.
•Use a welding curtain to prevent the unit to get damaged from a welding fire or flame
when the welding for a high pressure gas pipe is made.
•Connect the flange of the low pressure gas pipe to a pipe and then install the flange
to MCU. When installing the MCU, insert the provided O-ring into a gap.
•Wrap the high pressure gas pipe with wet cloth when brazing it.
installing the unit _29
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installing the unit
WIRING WORK
CAUTION
•Install a circuit breaker. For safety and maintenance, we strongly recommend that
MCCB, ELB and ELCB have to be installed every outdoor unit.
- ELCB : Earth Leakage Circuit Breaker
- MCCB : Molded Case Circuit Breaker
- ELB : Earth Leakage fuse Breaker
•Operate the unit after the refrigerant piping work must be done.
•Do not disassemble or alter the wiring of the unit during the electrical wiring work.
If not, the unit may be damaged.
Manufacturer’s recommended specifications of the circuit breaker
and power cable
1. Basic model
Capacity(HP)
Model
7.5
RD075VRXFA
10
RD100VRXFA
12.5
RD125VRXFA
MCCB(A)
ELB
50
50A, 30mA, ≤100ms
60
60A, 30mA, ≤100ms
2. Electric Specification
Power
supply
Units
Model
Min. Max.
Comp.
OFM
Hz
Volts
MCA
RLA
kW
RD075VRXFA
60
208-230
187
253
48.1
13.8+21.8
0.63
FLA
7
RD100VRXFA
60
208-230
187
253
53.8
19.6+21.8
0.63
7
RD125VRXFA
60
208-230
187
253
61.1
23.4+24.6
0.63
7
Starting current
• T
he relationship between the starting time and the starting current
(Digital Scroll Comp. + Fixed Scroll Comp)
RLA
Starting time
• V
oltage range
Units are suitable for use on electrical systems where voltage supplied to unit terminal is not
below or above listed range limits.
• Maximum allowable voltage variation between phases is 2%(4.6V).
 Abbreviations
- MCA: Min. Circuit Amps. (A)
MCA = 1.25 X LOAD1 + LOAD2
( LOAD1: RLA of Fixed Comp. / LOAD2: RLA of Digital Comp. + FLA of Fan Motor)
- RLA: Rated Load Amps. (A)
- OFM: Outdoor Fan Motor
- FLA: Full Load Amps. (A)
- kW : Rated Motor Output (kW)
30_ installing the unit
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Power supply and communication cable configuration
• A
ll wiring, components and materials to be procured on the site must comply with the
applicable local and national codes.
• Install the main power cable and grounding cable through the knock-out hole that is in the
middle (or in the bottom) of the side of the unit and at the bottom of the front of the unit.
• Install the power and communication cable using the cable tube separately.
• Fix a cable tube using a CD connector(Wire conduit) and bushing at the knock-out hole of the
outdoor unit.
• Be sure to install the switch and the fuse to the power line of each equipment.
ENGLISH
Cable tube
Cable tube
ELCB
ELCB
ELCB
or
MCCB+
ELB
Cable tube
Earth
Earth
Earth
Power cable
Communication cable
among outdoor units
Front side
Power cable
In case of putting the
power cable to front
Communication cable between
indoor and outdoor units
Specifications of the cable tube
Name
Material
Description
CD tube
PVC
- When the unit is installed indoors
- When the unit is not exposed outdoors because
of concrete construction
power cable tube
Galvanized steel sheet
- When the unit is installed indoors
- When the unit is exposed outdoors and then the
protection for a power cable is needed
vinyl tube for a power cable
- When the unit is installed indoors
Galvanized steel sheet + - When the unit is exposed outdoors and then
Soft PVC compound
the protection for a power cable or waterproof
function is needed
You must use the cables suits local standard.
• Using cables that are not suitable for local standard may lead to accident in the future that
may lead to property damage.
CAUTION
CAUTION
Caution for knock-out punching
• Make a knock-out hole by driving in a nail.
• After making a knock-out hole, apply rust resisting paint around the hole.
•Remove all burrs at the edge of the knock-out hole and secure the cable to the outdoor
knock-out using lining and bushing with an electrical insulation such as rubber and so on.
Connect the power cable using the compressed ring terminal.
installing the unit _31
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installing the unit
WIRING WORK
Power wiring diagram
 External connection diagram of DVM PLUS III HR
3 phase 3 wires
3 phase 3 wires
(208~230V)
or
MCCB+ ELCB
ELB
3 phase 3 wires
(208~230V) ELCB
Earth
Earth
Indoor Outdoor
OF1 OF2
Main unit
Sub unit
208~230V
R
208~230V
Indoor Outdoor
S
T
OF1 OF2
Earth
Communication cable
between indoor and
outdoor units
R
S
T
Communication
cable among
outdoor units
Earth
• C
onnect the power cable of the outdoor unit after checking that R-S-T(3 phase 3 wires) is
properly connected.
• The communication cable between indoor and outdoor units has no polarity.
• Arrange the cables using cable ties.
• You must install ELCB or ELB since electric shock or fire may occur if you do not install them.
CAUTION
•Indoor power supply must be separated from outdoor power supply.
•Connect the communication cable among the outdoor units when combining the
outdoor units.
•Connect the communication cable between indoor and outdoor units to the main
outdoor unit.
•If the communication cable between indoor and outdoor units and the
communication cable among outdoor units are crossed, communication is not
available.
•The length of the cable among the outdoor units should be under 30m(98'5") or less.
• Do not multiplex the communication cable to prevent communication error.
•Maximum wiring length between the outdoor unit and the farthest indoor unit is
1000m(3280'10").
Communication cable
Communication cable
32_ installing the unit
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Selecting solderless ring terminal
• S
elect a solderless ring terminal of a connecting power cable based on a nominal dimensions
for cable.
• Cover a solderless ring terminal and a connector part of the power cable and then connect it.
Silver solder
B
D
d1
E
F
L
d2
t
Nominal dimensions Standard Standard Standard Min. Min. Max. Standard Min.
Allowance Allowance Allowance Allowance for screw dimension
dimension
dimension
[mm [mm [mm dimension
[mm
[mm(inch)]
[mm(inch)]
[mm(inch)]
[mm(inch)]
[mm(inch)] [mm(inch)]
[mm(inch)]
[mm(inch)]
(inch)] (inch)] (inch)] [mm(inch)]
(inch)]
4/6
(0.006/
0.009)
4(3/8)
9.5(3/8)
8(3/16)
15(9/16)
10(0.01)
8(3/16)
16(0.02)
8(3/16)
8(3/16)
±0.2
(±0.007)
±0.2
(±0.007)
±0.2
16(10/16)
(±0.007)
15(9/16)
12(1/2)
25(0.03)
8(3/16)
16.5(10/16)
8(3/16)
16(10/16)
35(0.05)
8(3/16)
22(7/8)
50(0.07)
8(3/16)
22(7/8)
70(0.10)
8(3/16)
24(1)
+0.3(+0.011)
5.6(1/4)
3.4(1/8)
-0.2(-0.007)
7.1(1/4)
9(3/8)
±0.2
(±0.007)
+0.3(+0.011)
±0.2
4.5(3/16)
-0.2(-0.007)
(±0.007)
+0.3(+0.011)
±0.2
5.8(1/4)
-0.2(-0.007)
(±0.007)
±0.3
(±0.011)
11.5(7/16)
+0.5(+0.019)
±0.2
7.7(5/16)
-0.2(-0.007)
(±0.007)
±0.3
(±0.011)
13.3(1/2)
+0.5(+0.019)
9.4(3/8)
-0.2(-0.007)
±0.2
(±0.007)
±0.3
+0.5(+0.019)
±0.3
13.5(1/2)
11.4(7/16)
(±0.011)
-0.2(-0.007)
(±0.011)
±0.4
+0.5(+0.019)
±0.4
17.5(11/16)
13.3(1/2)
(±0.015)
-0.4(-0.015)
(±0.015)
5
20
6 (3/16) (3/4)
(1/4)
9
28.5
(3/8) (1-1/8)
7.9
9
30
(5/16) (3/8) (1-3/16)
9.5
13
33
(5/16) (1/2) (1-5/16)
15
11 (5/8) 34
(3/8) 13 (1-3/8)
(1/2)
13
38
12.5 (1/2) (1-1/2)
(1/2) 13
43
(1/2) (1- 11/16)
17.5 14
50
(11/16) (9/16) (2)
18.5 20
51
(3/4) (3/4) (2)
4.3
(3/16)
8.4
(1-3/16)
8.4
(1-3/16)
8.4
(1-3/16)
8.4
(1-3/16)
8.4
(1-3/16)
8.4
(1-3/16)
8.4
(1-3/16)
8.4
(1-3/16)
8.4
(1-3/16)
ENGLISH
Nominal dimensions
for cable
[mm2(inch2)]
+ 0.2(+0.007)
0(0)
0.9
+ 0.4(+0.015) (0.03)
0(0)
+ 0.4(+0.015) 1.15
0(0)
(0.04)
+ 0.4(+0.015) 1.45
0(0)
(0.05)
+ 0.4(+0.015) 1.7
0(0)
(0.06)
+ 0.4(+0.015) 1.8
0(0)
(0.07)
+ 0.4(+0.015) 1.8
0(0)
(0.07)
+ 0.4(+0.015) 2.0
0(0)
(0.078)
Connecting the power terminal
•
•
•
•
onnect the cables to the terminal board using the solderless ring terminal.
C
Connect the certified and rated cables only.
Connect using a driver which is able to apply the rated torque to the screws.
If the terminal is loose, fire may occur caused by arc.
If the terminal is connected too firmly, the terminal may be damaged.
• External force should not be applied to the terminal block and wires.
• The cable ties to fasten the wire should be an incombustible material, V0 or above.
(The cable ties should be used to fasten the power wire and they are supplied with the unit.)
Solderless
terminal
Cable tie
Cable
Separate the solderless terminal up
and down to prevent it being get loosen.
Place the thin cable upward and
the thick cable downward.
Secure the power cable
with the cable tie.
Tightening Torque [kgf·cm(lbf·ft)]
M4
12.0~14.7(0.86~1.06)
M8
56.1~74.4(4.05~5.38)
installing the unit _33
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installing the unit
WIRING WORK
Connecting the power terminal
Examples to use cable striper
<Cable striper>
1. A
djust the blade position by coin(the controller is at the bottom side of the
tool). Fix the blade position according to the outer sheath thickness of the
power cable.
2. Fix the power cable and tool by using the hook at the top side of the tool.
3. C
ut out the outer sheath of the power cable by revolving the tool in the
direction of the arrow, two or three times.
4. A
t this situation, cut out the outer sheath of the power cable by moving
the tool toward the arrow direction expressed.
5. Slightly bend the wire and pull out the cut part of the outer sheath.
Power cable arrangement
CAUTION
•Make sure all wiring should not contact with piping line during the field wiring work.
If not, the vibration of compressor can make a damage to wiring and piping.
•Make sure to pass electrical wiring of the power cable(3 phase 3 wires) through a
conduit hole of the front side.
Connecting the Ring terminal of 3 Phase cable(CV)
Connecting the Ring terminal of 3 Phase cable(FCV)
Middle frame
A
250mm
B
Cable
Base
line
A
B
Base line
A
B
A
B
30mm(1-1/8")
60mm(2-3/8")
30mm(1-1/8")
60mm(2-3/8")
1. B
e sure to connect the suitable length of power wiring to the power wiring terminal block
using ring terminal above the figures.
2. Make sure to fix wiring using cable tie like above the figures.
3. After wiring, reinstall the housing cover which has an isolator into the middle frame.
34_ installing the unit
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Grounding work
• Grounding must be done by a qualified installer for your safety.
 Grounding the power cable
• The standard of grounding may vary according to the rated voltage and installation place of
the air conditioner.
• Ground the power cable according to the following.
Installation
place
High humidity
Electrical
potential of lower than 150V
Average humidity
Perform the
grounding work 3. Note 1)
Electrical
potential of higher than
150V
Low humidity
Perform the grounding
work 2 if possible for your
safety. Note 2)
ENGLISH
Power
condition
Must perform the grounding work 3. Note 1)
(In case of installing circuit breaker)
Note 1) Grounding work 3
 Grounding must be done by your installation specialist.
 Check if the grounding resistance is lower than 100Ω.
When installing a circuit breaker that can cut the electric circuit in case of a short
circuit, the allowable grounding resistance can be 30~500Ω.
Note 2) Grounding at dry place
 The grounding resistance is should be lower than 100Ω.
(It should not be higher than 250Ω)
 Performing the grounding work
• Use the grounding wire by referring to the specification of the electric cable for the outdoor
unit.
 When using the terminal for grounding
only
Grounding terminal
 When using grounding of the switch
board
Switch board
installing the unit _35
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installing the unit
PERFORMING THE REFRIGERANT GAS LEAK TEST
• Use tools for R410A to prevent the inflow of foreign substances and resist against the internal pressure.
• Do not remove the core of filling port.
• Use dry Nitrogen gas as doing an airtight test like below.
Gauge manifold
Gas side
Liquid side
Pressure regulator
(Mandatory)
Gas side pipe
Liquid side pipe
Liquid side
pipe
Nitrogen gas
Apply pressure to the liquid side pipe,
gas side pipe and oil balancing pipe(only
for module) with Nitrogen gas of
4.1MPa(594.6Psi).
If you apply pressure more than 4.1MPa(594.6Psi),
the pipes may be damaged.
Apply pressure using pressure regulator.
Keep it for minimum 24 hours to check if
the pressure drops.
After applying Nitrogen gas, check the change of
pressure using pressure regulator.
If the pressure drops, check if there is gas
leak.
If the pressure is changed, apply soapy water to check
the leak. Check the pressure of the gas again.
Maintain 1.0MPa(145Psi) of the pressure
before performing vacuum drying and
check further gas leak.
After checking first gas leak, maintain 1.0MPa(145Psi) to
check further gas leak.
CAUTION
•Perform a Nitrogen gas leak test the service valve of the outdoor unit closed.
•Use both liquid side pipe and gas side pipe when charging the Nitrogen gas.
•If the pipe is filled in a short time with a highly excessive pressure of Nitrogen gas, the
pipes may be damaged. Make sure to use a regulator to prevent the high pressure
Nitrogen gas over 4.1MPa(594.6Psi) into the pipe.
36_ installing the unit
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VACUUM DRYING
• Use the tools for R410A to prevent the inflow of foreign substances and resist against the internal
pressure.
• Vacuum system to -100.7kPa(14.6Psi).
• Use the vacuum pump with the check valve to prevent pump oil from flowing backward while the
vacuum pump is stopped.
• Close the service valve of the liquid side pipe, gas side pipe and oil balancing pipe completely.
Connect the gauge manifold to the oil balancing pipe.
Perform vacuum drying of the liquid side
pipe, gas side pipe and oil balancing
pipe(only for module) using the vacuum
pump.
Make sure that check is installed valve to prevent pump
oil from flowing into the pipe.
Perform vacuum drying for 2 hours and
30 minutes or longer.
The time of vacuum drying may differ depending on
the length of the pipe or outdoor temperature.
Perform vacuum drying for at least 2 hours and 30 minutes.
Close the valve after the vacuum gauge pressure has reached at -100.7kPa(14.6Psi).
Check the vacuum pressure using the vacuum gauge.
ENGLISH
Connect the gauge manifold to the liquid
side pipe, gas side pipe and oil balancing
pipe(only for module).
Check the vacuum gauge pressure at
-100.7kPa(14.6Psi) for an hour after stopping
the vacuum pump.
Check the gas leak again.
- The pressure rises because water is
remaining in the pipe.
The pressure rises.
Yes
Vacuum destruction
- Apply pressure with Nitrogen gas of
0.05MPa(7.25Psi).
No
Adding refrigerant according to piping
length
Perform vacuum drying again up to
-100.7kPa(14.6Psi)(for 2 hours or longer).
No
CAUTION
The pressure rises.
Yes
•If the pressure rises in an hour, water remains inside the pipe or there will be a leak.
•Make sure to perform the airtight test and vacuuming for liquid pipe, gas pipe
and high pressure gas pipe after Heat Recovery installation.
If not, a trouble is caused in the airtight test and vacuum due to obstruction of
gas flow.
installing the unit _37
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installing the unit
INSULATING THE REFRIGERANT PIPE
Insulating the refrigerant
• Y
ou must check if there is a gas leak before completing all the installation process.
• Use EPDM insulation which meets the following condition.
Item
Unit
Standard
3
Density
Dimension change route by heat
Water absorption rate
Thermal conductivity
Moisture transpiration factor
Moisture transpiration grade
Formaldehyde dispersion
Oxygen rate
g/cm
%
g/cm3
kcal/m·h·˚C
ng/(m²·s·Pa)
g/(m²·24h)
mg/L
%
0.048~0.096
-5 or less
0.005 or less
0.032 or less
15 or less
15 or less
25 or less
Selecting the insulation of the refrigerant pipe
• Insulate the gas pipe and liquid pipe by referring to the thickness of insulator for each pipe size.
• The standard condition is 30°C, less than humidity 85%. If the condition is in high humidity, use
one grade thicker.
Insulator(Cooling, Heating)
Standard
High humidity
[30°C, 85%]
[30 °C, 85% or more]
EPDM, NBR
Pipe
Pipe size (mm)
Liquid pipe
Ø6.35~Ø9.52
Ø12.70~Ø50.80
9t
13t


Ø6.35
13t
19t
Gas pipe
Ø9.52
Ø12.70
Ø15.88
Ø19.05
Ø22.23
Ø25.40
Ø28.58
Ø31.75
Ø38.10
Ø44.45
19t
Ø50.80
25t
25t
Remarks
Heat resisting
temperature is more
than 120°C
32t
38t
Insulating the refrigerant pipe
• Be sure to insulate the refrigerant pipe, joints and connections with class ‘o’ material.
• If you insulate the pipes, the condensed water does not fall from the pipes and the capacity
of the air conditioner is improved.
• Check if there are any insulation cracks on the bent pipe.
Insulation
Clamp
Insulation
Indoor unit
Gas side pipe
Liquid side pipe
Indoor
unit
Install the insulation
to be overlapped
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Pipe insulation
Pipe insulation after insulating EEV kit
• Insulation of the gas and liquid pipes can be in contact with • When installing the gas side and liquid side pipes,
each other but they should not be pressing each other.
leave 10mm(3/8") of space.
• When contacting the gas side and liquid side pipe,
• When contacting the gas side and liquid side pipe,
use thicker insulation.
use thicker insulation.
10mm(3/8")
Insulation
Insulation
10mm(3/8")
10mm(3/8")
CAUTION
Gas pipe
•Install the insulation not to be get wider and
use the adhesives on the connection part of it
Additional
to prevent moisture entering.
insulation
•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.
ENGLISH
Liquid pipe
Gas pipe
Liquid pipe
Hanger
Insulation for
refrigerant pipe
a
ax3
Insulating the branch joint
 Y-joint & liquid side of the outdoor unit
• A
ttach the insulation provided with a branch joint to the insulation purchased individually
without a gap. Wrap the connected part with an insulation (purchased in the market) of a
thickness of at least 10mm(3/8").
• Use an insulation that should be able to handle the interior temperature over 120°C(248°F)
Wrap the branch joint with an insulation of a thickness of at least 10mm(3/8").
Pipe insulation
(Field supply)
Fix securely
without any
gap.
150mm(6")
Provided
Branch
joint
Insulation tape
(Field supply)
Fix securely without any gap.
Pipe insulation
Pipe
Pipe insulation
(Field supply)
A thickness of the insulation (Field supply)
should be at least 10mm(3/8").
Pipe insulation
(Field supply)
A
ttach the adhesive insulation tape to
the pipe as shown in the picture after
insulating the pipe.
installing the unit _39
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installing the unit
INSULATING THE REFRIGERANT PIPE
Insulating the branch joint
 Header joint
• F
asten the header joint using a cable tie and cover the connected part.
• Insulate the header joint and the welding part and wrap the connected part with an
adhesive insulation tape to prevent it from defrosting.
Insulation
Adhesive insulation
tape
Insulation for
the header joint
Insulation after welding a stopper
Insulation for the
refrigerant pipe
Adhesive insulation tape
 F ix the header joint after insulating it.
 Outdoor joint & gas side of the outdoor unit
• U
se an insulation that should be able to handle the interior temperature over 120°C(248°F).
• Wrap the branch joint with an insulation of a thickness of at least 10mm(3/8") as shown in
the picture.
• Wrap the connected part between the Outdoor joint and the gas side of the outdoor unit
to prevent it from defrosting.
Wrap here with a
vinyl tape
Pipe
Use EPDM insulation.
90°
Pipe insulation
(Purchased individually)
øD
Pipe insulation
(Purchased individually)
Insulation
(Purchased
individually)
Cut the insulation
at the proper angle.
øD
Cut the insulation at the
proper angle.
90°
ore
or m
mm
100
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 Insulating the interior of the outdoor unit pipe
• Insulate the whole service valve of the outdoor unit with a pipe insulation.
• Seal the gap between the outdoor unit pipe and the insulation.
Rainwater and dewdrops may soak through the gap between the pipe and the insulation
of the outdoor unit installed on the outside.
• Separate the cover of the pipe and close it after insulation work.
Remove a knock-out hole cover that installed the pipe and use it.
If the extra knock-out hole is open, small animals such as squirrels and rats may get into
the unit through the hole and the unit may be damaged.
ENGLISH
installing the unit _41
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completing the installation and
commissioning
CHARGING REFRIGERANT
Service valve work for gas pipe
• Block the cap of the service valve after charging the refrigerant.
- Connection torque of the cap for the refrigerant charging port : 6.0N·m(4.425lbf·ft)
- Connection torque of the stem : 25N·m(18.439lbf·ft).
- Adjustable torque of the valve stem.
ø19.05mm(3/4")~ : 10.0N·m(7.375lbs·ft)
Cap for the valve stem
Cap for the refrigerant
charging port
When installing 1 outdoor unit
Outdoor unit
Gas side
Liquid side
R410A
Gauge manifold
Scale
Service valve
Vacuum pump
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When installing more than 1 outdoor unit
Outdoor unit
Gauge manifold
Liquid side
Gas side Oil equalization
R410A
ENGLISH
Service valve
Scale
Vacuum pump
• O
pen the gauge manifold valve connected to the liquid side service valve and add the liquid
refrigerant.
• If you cannot add the whole quantity of the refrigerant while the outdoor unit is stopped, open
the gas side and liquid side service valve. Add remaining refrigerant by pressing the refrigerant
adding button of the outdoor PCB.
CAUTION
•Open the gas side and liquid side service valve completely after charging the
refrigerant. (If you operate the air conditioner with the service valve closed, the
important parts may be damaged.)
•When using the modular outdoor unit, open the service valve of the oil balancing pipe.
• Put on safety equipment when charging refrigerant.
•When the refrigerant is being charged, do not perform any other work such as
insulation, dip switch setting etc.
•Make sure not to get damaged from the fan when operating the unit while the front
panel is being opened.
•Do not heat the refrigerant vessel for fast refrigerant charging when the outside
temperature is low during winter season. There is a potential risk of explosion.
•Make sure that the refrigerant does not emit while connecting the gauge manifold to
the charging port for heating.
•Close the valve of the refrigerant vessel rapidly after charging refrigerant.
If not, a change in the whole refrigerant quantity may occur.
completing the installation and commissioning _43
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completing the installation and
commissioning
SETTING THE OPTION SWITCHES & FUNCTION KEYS
Option switch of the outdoor unit
�
�� �
����
����
����
Switch Setting
SW01/
SW02
SW03
SW04
SW05
Remarks
Main unit required only
Ex) As 12 indoor units were installed, SW01:1, SW02: 2
Manual address setting
ON
K5
OFF
Auto address setting
K9
ON
ON
OFF
OFF
K11
ON
ON
OFF
OFF
K13
ON
ON
OFF
K10
ON
OFF
ON
OFF
K12
ON
OFF
ON
OFF
K14
ON
OFF
ON
Target evaporating temperature (°C/°F)
7~9/45~48
5~7/41~45
9~11/48~52
10~12/50~54
Target high pressure (kg/cm2)
Normal
31.5 kg/cm2
33.0 kg/cm2
27.0 kg/cm2
Outdoor unit’s address
Outdoor unit’s address : No 1
Outdoor unit’s address : No 2
Outdoor unit’s address : No 3
Main unit
Sub 1 unit
Sub 2 unit
OFF
OFF
Outdoor unit’s address : No 4
Sub 3 unit
K15
ON
ON
OFF
OFF
K16
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
K17
K18
SW06
K19
K20
SW09
Function
Setting total quantity of Installed indoor units
SW01 : The tens digit, SW02 : The units digit
E
Cooling capacity compensation
Heating capacity compensation
7.5HP
(Digital unit)
12.5HP
(Digital unit)
10HP
(Digital unit)
K13 K14
OFF ON
K13 K14
ON OFF
K13 K14
ON ON
Sub 2
Sub 1
Main
Maximum current control
Standard
Factory default
90% of standard peak current value
80% of standard peak current value
Not used
Since supplying power, first oil return operation happens after 5hrs and then 7hrs.
Since supplying power, first oil return operation happens after 2hrs and then 2hrs.
Standard
Defrost period setting
Shorten defrost period by 20% approximately
Standard fan step
Fan step compensation (Maximum step)
7.5/10 HP : 19 Steps,12.5 HP : 23 Steps
Normal
Night’s quite mode
Setting total quantity of Installed indoor units
Main unit required only
 Above functions are activated by PCB of “main unit” only.
44_completing the installation and commissioning
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Key function
K1
K2
D
BC E
3456
F 012
K3
789A
K4
Key function
Display LED
Refrigerant charging in heating operation
“K” “1”
“BLANK”
“BLANK”
Push 2nd time
Test run in heating mode
“K” “2”
“BLANK”
“BLANK”
Push 3rd time
Pump out operation in heating mode (Outdoor unit’s address : NO 1)
“K” “3”
“BLANK”
“1”
Push 4th time
Pump out operation in heating mode (Outdoor unit’s address : NO 2)
“K” “3”
“BLANK”
“2”
Push 5th time
Pump out operation in heating mode (Outdoor unit’s address : NO 3)
“K” “3”
“BLANK”
“3”
Push 6th time
Pump out operation in heating mode (Outdoor unit’s address : NO 4)
“K” “3”
“BLANK”
“4”
Push 7th time
Open all valve of outdoor unit for vacuum preparation (Outdoor unit’s address : NO 1)
“K” “4”
“BLANK”
“1”
Push 8th time
Open all valve of outdoor unit for vacuum preparation (Outdoor unit’s address : NO 2)
“K” “4”
“BLANK”
“2”
Push 9th time
Open all valve of outdoor unit for vacuum preparation (Outdoor unit’s address : NO 3)
“K” “4”
“BLANK”
“3”
Push 10th time
Open all valve of outdoor unit for vacuum preparation (Outdoor unit’s address : NO 4)
“K” “4”
“BLANK”
“4”
Push 11th time
Open all valve for vacuum preparation (Total outdoor units, indoor unit and MCU units)
“K” “4”
“BLANK”
“A”
Push 12th time
Return to normal view mode
K2
-
Key function
Display LED
Push 1st time
Refrigerant charging in cooling operation
“K” “5”
“BLANK”
“BLANK”
Push 2nd time
Test run in cooling mode
“K” “6”
“BLANK”
“BLANK”
Push 3rd time
Pump down operation in cooling mode (All outdoor units)
“K” “7”
“BLANK”
“BLANK”
Push 4th time
Pipe checking (Check whether the pipe line of MCU correspond with indoor unit’s address in HR system)
“K” “8”
“BLANK”
“BLANK”
Push 5th time
Judgment system of refrigerant amount
“K” “9”
“BLANK”
“BLANK”
Push 6th time
Return to normal view mode
K3
Push 1st time
ENGLISH
K1
Push 1st time
Key function
Display LED
Reset
completing the installation and commissioning _45
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completing the installation and
commissioning
SETTING THE OPTION SWITCHES & FUNCTION KEYS
K4
Key function
Display LED
SEG 1
SEG 2, 3, 4
1
7.5 HP  Off, 0, 8
10 HP  Off, 1, 0
12.5HP  Off, 1, 2
Push 1st time
Outdoor capacity
Push 2nd time
Digital comp loading time
2
Ex) Loading 13 sec  Off, 1, 3
Push 3rd time
High pressure (kg/cm2)
3
Ex) High pressure 15.2 (kg/cm2)  1, 5, 2
Push 4th time
Low pressure (kg/cm2)
4
Ex) Low pressure 4.3 (kg/cm2)  0, 4, 3
Push 5th time
Discharge temperature of compressor 1
5
Ex) 87˚C  0, 8, 7
Push 6th time
Discharge temperature of compressor 2
6
Ex) 87˚C  0, 8, 7
Push 7th time
Discharge temperature of compressor 3
7
Ex) 87˚C  0, 8, 7
Push 8th time
CT sensor value of compressor 1
8
Ex) 2A  0, 0, 2
Push 9th time
CT sensor value of compressor 2
9
Ex) 2A  0, 0, 2
Push 10th time
CT sensor value of compressor 3
A
Ex) 2A  0, 0, 2
Push 11th time
Suction temperature
B
Ex) -5 ˚C  -, 0, 5
Push 12th time
Cond_out temperature
C
Ex) 35˚C  0, 3, 5
Push 13th time
Liquid tube temperature
C
Ex) 35˚C  0, 3, 5
Push 14th time
Oil temperature sensor on oil balancing pipe
C
Ex) 35˚C  0, 3, 5
Push 15th time
Sump temperature of compressor 1
F
Ex) 35˚C  0, 3, 5
Push 16th time
Ambient air temperature
G
Ex) 35˚C  0, 3, 5
Push 17th time
EVI_in temperature
H
Ex) 35˚C  0, 3, 5
Push 18th time
EVI_out temperature
I
Ex) 35˚C  0, 3, 5
Push 19th time
Main EEV1 step
J
Ex) 2000 steps  2, 0, 0
Push 20th time
Main EEV2 step
K
Ex) 2000 steps  2, 0, 0
Push 21th time
EVI EEV step
L
Ex) 300 steps  3, 0, 0
Push 22th time
HR EEV step
M
Ex) 300 steps  3, 0, 0
Push 23th time
Fan step ( SSR or BLDC )
N
Ex) 13 steps  Off, 1, 3
Push 24th time
Version
 Above functions are activated by PCB of “main unit” only.
46_completing the installation and commissioning
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COMPLETING THE INSTALLATION
• Measure the power cable terminal (3-phase: R, S, T) and the grounding of the outdoor unit using a
DC 500V ohmmeter before connecting the power.
- The measured value should be over 30MΩ..
CAUTION
•Never measure the communication terminal to prevent the communication circuit from being
damaged.
• Check the short-circuit of the communication terminal using the circuit test system.
208~230V
208~230V
208~230V
ENGLISH
• Check the terminal voltage and the phase using a voltmeter and phase test system before connecting
the power.
- R, S, T terminal : 208~230V between wires (R-S, S-T, T-R)
T
S
R
• Turn the switch on after checking the terminal.
<ELB>
• Check the R410A indoor unit is connected.
•If the power cables, R,S and T, are cross wired, E425 error occurs. Check for proper connection
of the power cable.
220V
220V
220V
T
S
R
completing the installation and commissioning _47
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completing the installation and
commissioning
COMPLETING THE INSTALLATION
•Check the following after the installation is completed.
• Check the external surface and the inside of the outdoor unit.
• Is there any possibility of short circuit?
Outdoor unit • Is the place well-ventilated and ensures space for service?
• Is the outdoor unit fixed securely?
Installation
Indoor unit
Refrigerant pipe work
• Check the external surface and the inside of the indoor unit.
• Is the place well-ventilated and ensures space for service?
• Check if the center of the indoor unit is ensured and it is installed horizontally.
• Is total number of connecting indoor units in the allowable range?
•A
re the length and the difference between the refrigerant pipes within the allowable range?
• Is the Y-joint properly installed?
• Is the pipe properly insulated?
• Is the quantity of the additional refrigerant correctly weighed in?
Installing the drain pipe
• Check the drain pipe of the outdoor unit and the indoor unit.
• Have you completed the drain test?
• Is the drain pipe properly insulated?
Installing the wiring
• Have you performed the earthing work 3 to the outdoor unit?
• Is 2-core cable used?
• Is the length of the wire is in the limited range?
• Is the wiring route correct?
Setting ADDRESS
• Are the ADDRESSES of the indoor and outdoor units properly set?
• Is the switch setting of the indoor units for centralized control properly made?
FINAL CHECKS AND TRIAL OPERATION
Inspection before trial operation
1. Check the power cable and communication cable of the indoor and outdoor unit.
2. Turn the circuit breaker(3 phases) on 6 hours before initial operation so that the crank case
heater can be heated.
3. Check the power supply between the outdoor unit and the cabinet panel.
• C
heck the 3 phase power of the compressor T1(Red), T2(White), T3(Black) by the
3 phase tester.
• C
heck the 208~230V power with the voltage meter.
4. Once the outdoor unit is turned on, it performs the tracking to check the connected indoor
unit and options.
5. Write down the details about the installation on the card attached on the front side of the
control box.
CAUTION
•Turn the circuit breaker on 6 hours before initial operation so the crank case heater
can be heated enough to start the system.
•If the heater is not heated, the air conditioner does not operate for 2 hours and
30 minutes to protect the compressor.
(‘CH’ is displayed on the PCB display of the outdoor unit.)
48_completing the installation and commissioning
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Trial operation
1. Run the unit by KEY MODE or controller.
• 1
st- Operate all indoor units by KEY MODE located outdoor PCB.
2nd- Operate each indoor unit run separately by controller.
• Inspect the compressor sound during the initial operation.
If roaring sound is heard, stop operation.
ENGLISH
• If roaring sound is heard and the pressure does not change, the back-lashing of the
compressor may occur.
Check the power supply of the compressor. If the problem occurs continuously, check
the compressor power cable.
3 phase: T1(Red), T2(White), T3(Black)
2. Check the indoor and outdoor units’ running status.
•
•
•
•
•
heck indoor unit cooling and heating air flow
C
Each indoor unit controls: air flow direction, air velocity
Indoor and outdoor unit’s abnormal running noise
Proper drainage from indoor unit in cooling mode
Check detail running status using S-NET program.
3. If error occurs during trial operation, check the error code of the unit and follow the
instruction.
4. Explain to the customer how to use the air conditioner according to the user’s manual.
5. Give the installation manual to the user.
CAUTION
Make sure top and bottom cabinets of the outdoor unit are closed before operating.
The unit may not work properly and fail to get S-NET data if the cabinets are open.
completing the installation and commissioning _49
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DVM PLUS3 HR_IM_E_32805-2.indd 50
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