Samsung AEX060EDEHA User manual

2
Safety precautions
Carefully follow the precautions listed as below because they are essential to guarantee the safety of SAMSUNG
product.
WARNING
• Always disconnect a power supply of Air-Water Heat Pump before servicing it or
accessing components inside the unit.
• Verify that installation and testing operations shall be performed by qualied
personnel.
• To prevent serious damage on the system and injuries to users, precautions and
other notices shall be observed.
Warning
fCarefully read the content of this manual before installing the air to water heat pump and store the manual in a safe place in
order to be able to use it as reference after installation.
fFor maximum safety, installers should always carefully read the following warnings.
fStore the operation and installation manual in a safe location and remember to hand it over to the new owner if the air
conditioner is sold or transferred.
fStore the user and installation manual in a safe location and remember to hand it over to the new owner if the air to water heat
pump is sold or transferred.
fThis manual explains how to install Air-Water Heat Pump. The use of other types of units with dierent control systems may
damage the units and invalidate the warranty.The manufacturer shall not be responsible for damages arising from the use of
non compliant units.
fThis product has been determined to be in compliance with the LowVoltage Directive (2006/95/EC), and the Electromagnetic
Compatibility Directive (2004/108/EEC) of the European Union.
fThe manufacturer shall not be responsible for damage originating from unauthorized changes or the improper connection
of electric and hydraulic lines. Failure to comply with these instructions or to comply with the requirements set forth in the
“Operating limits”table, included in the manual, shall immediately invalidate the warranty.
fFailure to comply with these instructions or to comply with the requirement on the Operating Range (Heat: -20~35°C/Cool:
10~46°C) set forth in the Product Specication (p.5) shall immediately invalidate the warranty.
fDo not use the units if you see some damages on the units and recognize something bad such as loud noisy, smell of burning.
fIn order to prevent electric shocks, res or injuries, always stop the unit, disable the protection switch and contact SAMSUNG’s
technical support if the unit produces smoke, if the power cable is hot or damaged or if the unit is very noisy.
fAlways remember to inspect the unit, electric connections, refrigerant tubes and protections regularly. These operations shall
be performed by qualied personnel only.
fThe unit contains moving parts and electrical parts, which should always be kept out of the reach of children.
Contents
Safetyprecautions ................................................................................................ 2
Productspecications ............................................................................................. 4
Outdoorunitspecication ........................................................................................ 4
Maincomponents ................................................................................................. 5
Installingtheunit ................................................................................................. 5
Electricalconnections ........................................................................................... 12
Connectingthecable ........................................................................................... 12
Refrigerantpipingwork ........................................................................................ 16
Checkingcorrectgrounding .................................................................................... 27
Settingtheoptionswitchandfunctionofthekeys .............................................................. 28
Pumpdownprocedure ......................................................................................... 30
Completingtheinstallation ..................................................................................... 33
Finalchecksandtrialoperation ................................................................................. 34
Troubleshooting ................................................................................................ 35
Errorcodes ...................................................................................................... 35

3
ENGLISH
fDo not attempt to repair, move, alter or reinstall the unit by unauthorized personnel, these operations may cause product
damage, electric shocks and res.
fDo not place containers with liquids or other objects on the unit.
fAll the materials used for the manufacture and packaging of the air to water heat pump are recyclable.
fThe packing material and exhaust batteries of the remote controller(optional) must be disposed of in accordance with local
regulations.
fThe air to water heat pump containing a refrigerant must be disposed in authorized center or returned to retailer as special
wastes.
fWear protective gloves to unpack, move, install, and service the unit to avoid your hands being injured by the edge of the parts.
fDo not touch the internal parts (water pipes, refrigerant pipes, heat exchangers, etc) while running the units. And if you need to
adjust and touch the units, have enough time for the unit can be cooled and be sure to wear protective gloves.
fIn case of refrigerant leakage, try to avoid getting in contact with the refrigerant because this could result in severe wounds.
fWhen you install the Air to water heat pump in a small room, you must consider a proper ventilation to prevent a leakage level
within the maximum permissible limit.
- In that case, you may die from suocation by some possibility.
fMake sure to safely dispose of packing materials. Packing materials, such as nails and other metal or wooden pallets may cause
children get injured.
fInspect the product shipped and check if damaged during transport. If the product has some damages, DO NOT INSTALL and
immediately discuss about the damages with the carrier or retailer (if the installer or the authorized technician has collected
the material from the retailer.)
fOur units shall be installed in compliance with the spaces described in the installation manual, to ensure accessibility from both
sides and allow repairs or maintenance operations to be carried out. If the units installed without complying with procedures
described in manual, additional expenses can be asked because special harnesses, ladders, scaolding or any other elevation
system for repair service will NOT be considered part of the warranty and will be charged to the end customer.
fAlways make sure that the power supply is compliant with local safety standards.
fVerify that the voltage and frequency of the power supply comply with the specications and input power is sucient to
ensure the operation of any other domestic appliance connected to the same electric lines. Always verify that the cut-o and
protection switches are suitably selected.
fAlways verify that electric connections (cable entry, section of leads, protections…) are compliant with the electric
specications and with the instructions provided in the wiring scheme. Always verify that all connections comply with the
standards applicable to the installation of air to water heat pumps. Devices disconnected from the power supply should be
completely disconnected in the condition of overvoltage category.
fDo not connect the earth wire to the gas pipe or water pipe, lighting rod, surge absorber, or telephone earth wire. If earthing is
not complete, it may cause an electric shock or re.
fBe sure to install both an earth leakage detector and circuit breaker with specied capacity in accordance with relevant local
and national regulations.
- If it is not installed properly, it may cause electric shocks and re.
fMake sure that the condensed water runs well out of the unit at low ambient temperature. Drain pipe and cond heater can
frost/ice can not grow. If drain work is not eective for releasing condensed water, it can make the units get damaged by
massive ice and system can be stop , covered by ice.
fInstall the power cable and communication cable of the indoor and outdoor unit at least 1m away from the electric appliance.
fProtect the unit from rats or small animals. If an animal makes a contact with the electric parts, it can cause malfunctions,
smoke or re. Please instruct the customer to keep the area around the unit clean.

4
Product specications
Product line-up
Line-up Remark
Heat pump units Chassis -
Model name AEX060EDEHA
Accessories
fKeep supplied accessories until the installation is nished.
fHand the installation manual over to the customer after nishing installation.
fThe quantities are indicated in parentheses.
Installation manual (1) Drain plug (1) Nipple-Connetor(1)
Rubber Leg(4)
Outdoor unit specication
Type Unit AEX060EDEHA
Power source - 1P, 220~240VAC 50Hz
Compressor - Rotary Inverter
Condenser - Ø7, L906
Fan & Motor - Propeller, Ø420,3-blade,BLDC Inverter
Refrigerant kg 1.2
Noise
(Heat/Cool, Pressure) dBA 53 / 54
Operating range
(Heat/Cool) °C -20~35 / 10~46
Leaving water
temperature °C Cooling : 5 ~ 25
Heating : 25 ~ 55
Weight (net/gross) kg 47.5/52.5
Size (WxHxD, net) mm 880X638X310

5
ENGLISH
Main components
Dimensions(Overall)
Heat pump for R-410A.
638
364
23
61050 12
880
54.1
310
Installing the unit
Deciding on where to install the outdoor unit
Decide the installation location regarding the following condition and obtain the user’s approval.
fThe outdoor unit must not be placed on its side or upside down, as the compressor lubrication oil will run into
the cooling circuit and seriously damage the unit.
fChoose a location that is dry and sunny, but not exposed to direct sunlight or strong winds.
fDo not block any passageways or thoroughfares.
fChoose a location where the noise of the Air toWater Heat Pump when running and the discharged air do not
disturb any neighbours.
fChoose a position that enables the pipes and cables to be easily connected to the other hydrauric system.
fInstall the outdoor unit on a at, stable surface that can support its weight and does not generate any
unnecessary noise and vibration.
fPosition the outdoor unit so that the air ow directly stream towards the open area.
fPlace the outdoor unit where there are no plants and animals because they may cause malfunction of outdoor
unit.
fMaintain sucient clearance around the outdoor unit, especially from a radio, computer, stereo system, etc.
fWhen installing the outdoor unit near seashore, make sure it is not directly exposed to sea breeze. If you can
not nd an adequate place without direct sea breeze, make sure to apply anti-corrosion coating on the heat
exchanger.

6
fDo not install the Air to Water Heat Pump in following places.
• The place where there is mineral oil or arsenic acid. There is a chance that parts may get damaged due to
burned resin. The capacity of the heat exchanger may reduce or the Air to Water Heat pump 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 danger of existing combustible gas, carbon ber or ammable dust. The place
where thinner or gasoline is handled.
• Do not install the outdoor unit in a snowy and cold area (low temperature and high humidity area -
where the temperature is below -7°C and humidity is higher than 85%) because according to operation
condition (defrost, etc.), ice may be formed in the drain route.
If the ice is accumulated, it may cause critical damage to the product.
ex) lakeside of cold area in winter time, seashore, alpine region and etc.
• This device must be installed according to the national electrical rules.
• With an outdoor unit having net weight upper than 60kg, we suggest do not install it suspended on wall,
but considering oor standing one.
fIf the outdoor unit is installed at a height, ensure that its base is rmly xed in position.
fMake sure that the water dripping from the drain hose runs away correctly and safely.
fWhen you install the outdoor unit at wayside, you should install it above 2m height or make sure that the heat
from the outdoor unit shouldn't be in direct contact with passersby. (The ground for application :The revision
of regulation for facility in building by the law of the Ministry of Construction and Transportation.
CAUTION
CAUTION
fInstall 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.
fIf you cannot avoid installing the outdoor unit by the seashore, construct a protection wall around to block
the sea breeze.
fInstall the outdoor unit in a place where water can drain smoothly.
• Protection wall should be constructed with a solid material
such 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 unit. Also, secure over 700mm between
the protection wall and the outdoor unit for exhausted air
to ventilate.
Sea
Sea breeze
Outdoor
unit
Sea
Sea breeze
Outdoor
unit
Sea
Sea breeze
Outdoor
unit
Protection wall
* If you cannot nd a place satisfying above conditions, please contact manufacturer. Make sure to clean the
sea water and the dust on the outdoor unit heat exchanger.
Installing the unit

7
ENGLISH
Installing the unit
Space requirements for outdoor unit
When installing 1 outdoor unit
(Unit : mm)
300 or more
1,500 or more
* When the air outlet is opposite the wall * When the air outlet is towards the wall
300 or more
300 or more 600 or more
1,500 or more
2,000 or more
* When 3 sides of the outdoor unit are blocked by
the wall
* The upper part of the outdoor unit and the air
outlet is towards the wall
600 or more
300 or more
1,500 or more 300 or more
* The upper part of the outdoor unit and the air
outlet is opposite the wall
* When front and rear side of the outdoor unit is
towards the wall

8
When installing more than 1 outdoor unit
(Unit : mm)
1500 or more
* When the air outlet is towards the wall
300 or more
300 or more 600 or more 600 or more 600 or more
* When 3 sides of the outdoor unit are blocked by the wall
300 or
more
1500 or
more
600 or more 600 or more
500 or
more
500 or
more
300 or more
300 or more
* When front and rear side of the outdoor unit is towards the wall * The upper part of the outdoor unit and
the air outlet is opposite the wall
1500 or more 600 or more 3000 or more 300 or more3000 or more
* When front and rear side of the outdoor unit is towards the wall
• The units must be installed according to distances declared, in order to permit accessibility from each
side, either to guarantee correct operation of maintenance or repairing products.The unit’s parts must be
reachable and removable completely under safety condition (for people or things).
CAUTION
Installing the unit

9
ENGLISH
Outdoor unit installation
The outdoor unit must be installed on a rigid and stable base to avoid any increase in the noise level and vibration,
particularly if the outdoor unit is to be installed in a location exposed to strong winds or at a height, the unit must
be xed to an appropriate support(wall or ground).
fFix the outdoor unit with anchor bolts.
• The anchor bolt must be 20mm or higher from the
base surface.
• When tightening the anchor bolt, tighten the rubber
washer to prevent the outdoor unit bolt connection
part from corroding.
• Make a drain outlet around the base for outdoor unit
drainage.
• If the outdoor unit is installed on the roof, you have to
check the ceiling strength and waterproof the unit.
Outdoor unit support
Soft rubber designed to cut o
vibration from rack to wall. (not
supplied with product)
Designed to cut o residual vibration
from outdoor unit to rack. (not supplied
with product)
20mm
Anchor bolt
Outdoor
unit
Base surface
Outdoor unit
support
fOutdoor unit installed on the wall by rack
- Ensure the wall will be able to suspend the weight of rack and outdoor unit ;
- Install the rack close to the column as much as possible ;
- Install proper grommet in order to reduce noise and residual vibration transferred by outdoor unit towards
wall.
When installing air guide duct
• Check and make sure that screws do not damage the copper pipe.
• Secure air guide duct on guard fan.
(Unit : mm)
660
880
310 340
364
Anchor bolt hole
NOTE
CAUTION
CAUTION
Installing the unit
Rubber leg

10
Drain work
While Air-Water Heat Pump is running in heating mode, Ice can begin accumulate on the surface of condenser.To
prevent Ice from growing, system go into De-frost mode and then Ice on the surface changes to water.
Dropped water from condenser shall be eliminated through running drain holes to prevent Ice growing at low
temperature.
fIn case there is not enough space for drainage out of the unit, additional
drain works are required. Follow the description as below
- Make space more than 50mm between the bottom of the outdoor unit
and the ground for installation of the drain hose.
- Insert the drain plug into the hole on the bottom of the outdoor unit.
- Connect the drain hose to the drain plug.
- Make sure dusts or small branches should not go into the drain hose.
≥50mm
• If drain work is not enough, it can lead to system performance degration and system damages.
Drain plug x 1ea
Drain hole Ø20
Air discharge side
30 mm
1. Prepare a water drainage channel around the foundation, to drain waste water from around the unit.
2. If the water drainage of the unit is not easy, please build up the unit on a
foundation of concrete blocks, etc. (the height of the foundation should be
maximum 150mm).
3. If you install the unit on a frame, please install a waterproof plate within
150mm of the underside of the unit in order to prevent the invasion of water
from the lower direction.
4. When installing the unit in a place frequently exposed to snow, pay special
attention to elevate the foundation as high as possible.
5. If you install the unit on a building frame, please install a waterproof plate
(eld supply) (within 150mm of the underside of the unit) in order to avoid
the drain water dripping. (See gure)
WARNING
Installing the unit

11
ENGLISH
Selecting a location in cold climates
• When operating the unit in a low outdoor ambient temperature, be sure to follow the instructions
described below.
fTo prevent exposure to wind, install the unit with its suction side facing the wall.
fNever install the unit at a site where the suction side may be exposed directly to wind.
fTo prevent exposure to wind, install a bae plate on the air discharge side of the unit.
fIn heavy snowfall areas it is very important to select an installation site where the snow will not aect the unit.
If lateral snowfall is possible, make sure that the heat exchanger coil is not aected by the snow (If necessary
construct a lateral canopy)
1. Construct a large canopy.
2. Construct a pedestal.
- Install the unit high enough o the ground to prevent it being buried
under snow.
fThe fan inside outdoor unit will operate regularly, as designed, with switch 2 to prevent from snow
accumulating inside outdoor unit. (Refer to page 29)
fThe outdoor unit should be installed with consideration of the direction of strong winds.These can make the
unit turn over, so the side of the unit should be set to face the wind, not the front of the unit.
Strong wind Strong wind
blown air
NOTE
Installing the unit

12
Electrical connections
Overall system conguration
Connection of the power cable (1 phase 2 wires)
Distribution board Outdoor unit Hydro unit
1 phase
2 wires
220-
240V~
Earth
Communication cable
ELCB
1 phase
2 wires
220-
240V~
1 phase
2 wires
220-
240V~
Earth
DHW tank
Earth
MCCB+
ELB
Or
• Install cabinet panel near the outdoor unit for the convenience of service and emergency operation o.
• Make sure to install the circuit breaker with the over-current and electric leakage protection.
CAUTION
Connecting the cable
Power cable specications
1 phase
Outdoor unit
Rated Voltage Range MCA MFA Fuse cut-o
current
Hz Volts Min Max
Maximum
Current
in normal
operation
MCA1.25 +
Additional Load
Total fuse in
unit
AEX060EDEHA 50 220-240 198 264 20 A 25 A 30 A
fThe power cable is not supplied with air conditioner.
fSupply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed exible
cord (Code designation IEC:60245 IEC 57 / CENELEC:H05RN-F)
fEquipment complying with EN/IEC 61000-3-12.
• Incaseofextendingtheelectricwire,pleaseDONOTusearound-shapedpressingsocket.
- Incomplete wire connections can cause electric shock or a re.

13
ENGLISH
L
N
f1 phase
Communication
cable
Main power cable
Cable
clamp
Cable tie
Connecting the cable
Between indoor unit and outdoor unit connection cable specications(common in use)
Power supply Communation cable
Power supply Max/Min(V) Indoor power cable
1Φ, 220-240V, 50Hz ±10% 0.75~1.5mm², 3wires 0.75~1.5mm², 2wires
fFor Indoor Power Cable, use the grade H07RN-F or H05RN-F materials.
When installing the indoor unit in a computer room or net work room, use
the double shielded (Tape aluminum / polyester braid + copper ) cable of
FROHH2R type.
1-phase terminal block spec
AC power : M4 screw Communication : M4 screw
LN
11.4 10.1 10.1
11.4
Wiring diagram of power cable
When using ELB for 1 phase
Power Supply
MCCB
ELB
MCCB
Hydro unit
Electrical component box
* The appearance of the unit may be
dierent from the picture depending on
the model.

14
• You should connect the power cable into the power cable terminal and fasten it with a clamp.
• The unbalanced power must be maintained within 2% of supply rating.
- If the power is unbalanced greatly, it may shorten the life of the condenser. If the unbalanced power is
exceeded over 4% of supply rating, the indoor unit is protected, stopped and the error mode indicates.
• To protect the product from water and possible shock, you should keep the power cable and the
connection cord of the indoor and outdoor units within ducts. (with appropriate IP rating and material
selection for your application)
• Ensure that main supply connection is made through a switch that disconnects all poles, with contact gap
of a least 3 mm.
• Devices disconnected from the power supply should be completely disconnected in the condition of
overvoltage category.
• Keep distances of 50mm or more between power cable and communication cable.
CAUTION
1 phase 2 wires (220-240V~)
F1 F2
N L N L N L
1 phase 220-240V~
Earth
Communication cable
between Hydro unit
and outdoor units
Power cable
Earth cable
(U-Trap)
1 phase
220-240V~
1 phase
220-240V~
DHW Tank
Hydro unit
Communication
cable
Circuit
breaker
• When removing the outer cover of the power cable, use the appropriate tools to prevent damaging the
inner cover.
• Make sure to place the outer cover of the power cable and the communication cable, at least 20mm into
the electrical parts.
• Communication wiring should be done separately from the power cable and other communication
cables.
CAUTION
Connecting the cable

15
ENGLISH
Connecting the cable
Connecting the power terminal
fConnect the cables to the terminal board using the compressed ring terminal.
fConnect the rated cables only.
fConnect using a wrench which is able to apply the rated torque to the screws.
fIf the terminal is loose, re may occur caused by arc. If the terminal is connected too rmly, the terminal may be
damaged.
Tightening Torque (kgf.cm)
M4 12.0~14.7
M5 24.4~29.8
Installing the earth wire
fEarthing must be done by your installation specialist for your safety.
fUse the earth wire by referring to the specication of the electric cable for the outdoor unit.
Earthing the power cable
fThe standard of earthing may vary according to the rated voltage and installation place of the Air to Water Heat
Pump.
fEarth the power cable according to the following.
Installation place
Power condition High humidity Average humidity Low humidity
Electrical potential of lower than 150V Perform the earthing work
3. Note 1)
Perform the earthing work 2 if
possible for your safety. Note 2)
Electrical potential of higher than 150V Must perform the earthing work 3. Note 1)
(In case of installing circuit breaker)
* Note 1) Earthing work 3
- Earthing must be done by your installation specialist.
- Check if the earthing resistance is lower than 100Ω.When installing a circuit breaker that can cut the electric
circuit in case of a short circuit, the allowable earthing resistance can be 30~500Ω.
* Note 2) Earthing at dry place
- The earthing resistance should be lower than 100Ω. (Even in worst case it should be lower than 250Ω.)
fWhen using the terminal for earthing only fWhen using earthing of the switchboard
Earth
terminal
Distribution
Board

16
fInstall the refrigerant pipe within the maximum allowable length, dierence in height and length of after the
rst branch pipe.
fThe pressure of the R-410A is high.
Use only rated refrigerant pipe and follow the installation method.
fUse clean refrigerant pipe Where there is no harmful ion, oxide, dust, iron content or moisture.
fUse adequate tools and accessories for R-410A.
Manifold gauge • Use manifold gauge only for R-410A to prevent the inow of foreign substances.
Vacuum pump
• Use vacuum pump with check valve to prevent pump oil from owing backward while the
vacuum pump is stopped.
• Use the vacuum pump that the vacuum induction is available up to 5Torr. (-100.7kPa)
Flare nut • Use only are nut supplied with the product.
Allowable length of the refrigerant pipe and the installation examples
fAEX060EDEHA,
Outdoor unit
Item Example Remarks
Maximum
allowable
length of
pipe
Outdoor unit
~ Hydro unit Total length Less than 30m a ≤ 30m
Maximum
allowable
height
Outdoor unit
~ Hydro unit Less than 20m H1
Additional refrigerant
calculation R=Basic charge + additional charge by the piping length
Contact the manufacturer if the length should exceed.
Refrigerant piping work

17
ENGLISH
Selecting the refrigerant pipe
Outdoor unit capacity (kW) Liquid side
(mm) Gas side (mm)
AEX060EDEHA ø6.35 ø15.88
fInstall refrigerant pipe depending on the outdoor unit
capacity.
fMake sure to use C1220T-1/2H (Semi-hard) pipe for
more than Ø19.05mm. In case of using C1220T-O (Soft)
pipe for Ø19.05mm, pipe may be broken, which can
result in an injury.
Keeping refrigerant pipe clean and dry
fTo prevent foreign materials or water from entering the pipe, pipes shall be sealed by caps.
Installing the Nipple
fBefore connecting the refrigerant pipe, the Nipple must be connected to liquid side pipe of Hydro unit.
Refrigerant piping work
Outer
diameter (mm)
Minimum
thickness
(mm)
Temper grade
ø 6.35 0.7
C1220T-0
ø 9.52 0.7
ø12.70 0.8
ø15.88 1.0
ø15.88 0.8 C1220T-1/2H OR
C1220T-H
ø19.05 0.9
ø22.23 0.9
* Temper grade and minimum thickness of the
refrigerant pipe
Disassemble
WATER
OUTLET
WATER
INLET
Liquid
pipe
Gas
pipe
Assemble
WATER
OUTLET
WATER
INLET
Liquid
pipe
Gas
pipe

18
Cutting or aring the pipes
1. Make sure that you prepared the required tools.
- Pipe cutter, reamer, aring tool and pipe holder, etc.
2. If you want to shorten the pipe, cut it with a pipe cutter ensuring that the cut edge remains at 90° with the side
of the pipe.
- There are some examples of correct and incorrect cut edges below.
90° Oblique Rough Burr
3. To prevent a gas leak, remove all burrs at the cut edge of the pipe with a reamer.
• Face the pipe down while removing the burrs to make sure that burrs
do not get in to the pipe.
4. Put a are nut slightly into the pipe and modify the are.
Pipe Flare
Outer diameter [D(mm)] Depth [A (mm)] Flaring Size [B (mm)]
ø 6.35 1.3 9.0
ø 9.52 1.8 13.0
ø 12.70 2.0 16.2
ø 15.88 2.2 19.3
ø19.05 2.2 22.5
5. Check that you ared the pipe correctly.
- Below gures shows some examples of incorrectly ared pipes.
Correct Inclined Damaged
surface Cracked Uneven thickness
6. Align the pipes to connect them easily. Tighten the are nuts rst with your hands, and then with a torque
wrench, applying the following torque:
Indoor outlet pipe Connecting pipe
Flare nut
Apply frozen oil Outer diameter (mm) Torque(N•m)
ø 6.35 12~17
ø 9.52 30~35
ø 12.70 40~45
ø 15.88 50~60
ø19.05 60~70
• Excessive torque can be cause of gas leakage.
• You must purge with oxygen free nitrogen while brazing.
Pipe cutter
Pipe Burr
CAUTION
NOTE
CAUTION
Refrigerant piping work

19
ENGLISH
Selecting the insulator of the refrigerant pipe
fAccording to pipes size, insulate pipes on gas and liquid side by selecting appropriate insulations.
fStandard condition is under a temperature of 30°C and a humidity of 85%. If the units are installed in extreme
weather conditions, select the insulator by table below.
Pipe type Pipe diameter (mm)
Thickness of insulator
Remarks
Normal
(Under 30°C, 85%)
High humidity
(Over 30°C, 85%)
EPDM, NBR
Liquid ø6.35~ø19.05 9 9
The material shall has
heat resistant over
120°C
ø12.70~ø19.05 13 13
Gas
ø6.35 13 19
ø9.52
19 25
ø12.70
ø15.88
ø19.05
• Install the insulation not to be get wider and use the adhesives on the connection part of it to prevent
moisture 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.
CAUTION
Refrigerant piping work

20
Insulating the refrigerant pipe
fYou must check if there is a gas leak before completing all the installation process.
fUse EPDM insulation which meets the following condition.
Item Unit Standard Remarks
Density g/cm² 0.048~0.096
KSM 3014-01Dimension change route by heat % -5 or less
Water absorption rate g/cm² 0.005 or less
Thermal conductivity kcal/m·h·˚C 0.032 or less KSL 9016-95
Moisture transpiration factor ng/(m²·s·Pa) 15 or less KSM 3808-03
Moisture transpiration grade {g/(m²·24h)} 15 or less KSA 1013-01
Formaldehyde dispersion mg/L - KSF 3200-02
Oxygen rate % 25 or less ISO 4589-2-96
Insulating the refrigerant pipe
fBe sure to insulate the refrigerant pipe, joints and connections with class 'o' material.
fIf you insulate the pipes, the condensed water does not fall from the pipes and the capacity of the Air toWater
Heat Pump is improved.
fCheck if there are any insulation cracks on the bent pipe.
Insulation
Gas side pipe
Liquid side pipe
Indoor unit
Clamp Insulation
Install the insulation
to be overlapped
Indoor unit
Overlapped
Brazing the Pipe
fMake sure that there is no moisture inside the pipe.
fMake sure that there are no foreign materials and impurities in the pipe.
Replacement of Nitrogen gas
1. Use oxygen free nitrogen gas when brazing the pipes as shown in the picture.
2. If you do not use Nitrogen gas when brazing the pipes, oxidation may form in the pipe. It can cause the
damage of the compressor and valves.
3. Adjust the ow rate of the replacement with a pressure regulator to maintain 0.05m3/h or more.
4. Perform brazing of the service valve after protecting the valve.
Brazing part
Nitrogen gas
1/4" copper pipe
Valve stem
Taping
Pressure regulator
Refrigerant piping work