Samsung RD040MHXCA, RD050MHXCA split-system air conditioner Installation Manual
Below you will find brief information for split-system air conditioner RD040MHXCA, split-system air conditioner RD050MHXCA. The split-system air conditioner RD040MHXCA and the split-system air conditioner RD050MHXCA are designed for both cooling and heating. Both models are designed to be reliable and energy-efficient, and they come with a variety of features to make them easy to use. They also include a variety of safety features to ensure that they are used safely.
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Contents
S AFETY P RECAUTIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
P REPARING THE INSTALLATION
Locating the Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
I
NSTALLING THE UNIT
Installing the Refrigerant Pipe Work . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
C
OMPLETING THE INSTALLATION
Setting the Option Switch and Function of the Keys . . . . . . . . . . 31
Pump Down Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Completing the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Final Checks and Trial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Pump Down Procedure (When removing the product). . . . . . . . 37
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
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Safety Precautions
You must install the product by qualified installer. If you install the product on your own or by unqualified person, Samsung is not responsible for any damages which may occur due to incorrect installation.
Make sure to read the following safety precautions carefully before installation.
Make sure to observe the cautions specified in this manual.
Conduct a test run of the unit after installation and then explain all system functions to the owner.
Follow IEC (International Electrotechnical Commission) standards for the power input and
ISO (International Standards Organization) standards for input current.
R410a refrigerant is used for Super FJM air conditioner.
- When using R410a, moisture or foreign substances may affect to the capacity and reliability of the product. Safety precautions must be taken when installing the refrigerant pipe.
- The design pressure of the unit is 4.1MPa(594.6psi). Select appropriate material and thickness according to the regulations.
- R410a is a quasi-azeotrope of two refrigerants.
Make sure to charge liquid one when adding 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 only the indoor units fit on 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.)
When installing, use tools and materials for R410a only. If you use tools and materials for R22, there is potential risk of bursting, injury, electric shock and fire because the pressure of R410a is higher than the pressure of R22(conventional).
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Safety Precautions (Continued)
WARNING Hazards or unsafe practices that may result in severe personal injury or death.
CAUTION Hazards or unsafe practices that may result in minor personal injury or property damage.
WARNING Hazards or unsafe practices that may result in severe personal injury or death.
Installation must be carried out by a qualified installer. Do not attempt to repair, move, modify or reinstall the unit on your own since such act may cause fire, electric shock or water leakage.
Install the unit in a place where it is strong enough to hold the product weight. When installed in place where it is not strong enough to withhold the product weight, the unit could fall and cause injury.
The unit should be installed in accordance with the National Electrical regulations. Check if the voltage and the frequency of the main power supply are those required for the unit to be installed and check the connection. Do not share the power outlet with other appliances. Incomplete connection, defective insulation or exceeding the permissible current may cause electric shock or fire.
Use the specified wires to connect the indoor and outdoor units securely and attach the wires firmly to the terminal block connecting sections so that the pressure is not applied to the sections. Inappropriate connection and fixing could cause fire.
Attach the electrical cover to the indoor and outdoor unit securely without any gaps. If there are any gaps, there is potential risk of fire or electric shock due to dust or water.
Make sure to use the part provided or specified parts for the installation work. The use of defective parts could cause an injury or leakage of water due to a fire, an electric shock, the unit falling, etc.
Make sure that the refrigerant gas does not leak after completing the installation. If the refrigerant gas of the indoor unit leaks and comes into contact with the fan heater, space heater or stove, harmful gas will be generated.
Ensure that the national safety code requirements have been followed for the main supply circuit. Ensure that a proper ground wire is in place. Do not connect the ground to a gas pipe, water pipe, lightning rod or telephone grounding. Defective grounding could cause electric shock.
Do not install the unit in a place with direct sunlight, dangerous substances or where it is exposed to inflammable gas leakage to prevent explosion, fire or personal injury.
Perform the installation securely referring to the installation manual. Incomplete installation could cause personal injury due to fire, electric shock and water leakage or from the unit falling.
Check first the following situations before starting the operation during the installation.
- The pipe must be properly connected and make sure there is no leakage.
- Service valves must be open. If compressor is operated with the service valve closed, excessive pressure may damage parts of the compressor.
If leakage occurs on any of the connection, air inflow may also cause excessive pressure that could lead to explosion.
Stop the compressor before disconnecting the refrigerant pipe for pump-down operation. If you disconnect the refrigerant pipe while compressor is operating with service valve open, air inflow will cause excessive pressure in the refrigerant cycle that could lead to explosion and personal injury.
Do not assemble the power cord on your own, use two cables together to extend the cable length or tangle the cable. Bad connection, isolation and over voltage may cause fire or electric shock.
Make sure to turn off the main power when setting up the indoor unit electrical circuit or power cords.
There is a risk of electric shock.
Make sure that proper circuit breaker and safety switches are installed. Install a ground leakage breaker depending on the installation place (where it is humid). If not, it may cause electric shock.
Do not install the unit by yourself (owners). Incorrect installation of the unit could cause injury due to fire, electric shock and water leakage or from the unit falling. Consult a dealer or a qualified installer.
Use the unit on a single outlet circuit. Do not share the power outlet with other appliances. Obtain the consent by a qualified installer before connecting the unit to the power supply system. An all pole disconnection from the power supply must be incorporated in the fixed wiring with a contact opening of >3mm(1/8in).
Manufacturer is not responsible for accidents due to incorrect installation.
When you install the air conditioner in a small room, you consider a proper ventilation to prevent a leakage level within the maximum permissible limit.
- In that case, you may die from suffocation by some possibility.
Fix the outdoor unit securely to prepare against strong wind or earthquake.
- If the outdoor unit is not properly fixed, it turns over and accidents may occur.
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Safety Precautions (Continued)
If any gas or impurities except R410a refrigerant come into the refrigerant pipe, serious problem may occur and it may cause injury.
Install the cables with supplied cables firmly. Fix them securely so that external force is not exerted to the terminal board.
- If the connection or fixing is incomplete, it can cause trouble with a heat generation, electric shock or fire and so on.
CAUTION
Hazards or unsafe practices that may result in minor personal injury or property damage.
Perform the drainage/piping work securely according to the installation manual. If not, water could drop from the unit and household goods could get wet and damaged.
Fasten a flare nut with a torque wrench as specified in this installation manual. When fastened too tight, a flare nut may break after a long period of time and cause refrigerant leakage.
Wear thick gloves during the installation process. If not, personal injury may occur due to the air conditioner parts.
Be careful not to touch the outdoor unit inlet or aluminum pins. You may get personal injury.
Do not install the outdoor unit in a place where animals could live. If an animal get contact with the electric parts, damage or fire may occur. In addition ask the customer to maintain a clean installation place around it.
After completing the installation run the trial operation. If no error occurs, explain to the customer how to use and clean the air conditioner according to the user’s manual. In addition give the installation manual and the user’s manual to the customer.
Check the unit for damage that may have taken place during transportation and do not install or use damaged equipment.
All of the manufacturing and packaging material used for your new appliance are compatible with the environment and can be recycled.
Dispose of the packaging material in accordance with the local requirements.
This product is an air conditioning system and contains a coolant that must be recovered and disposed of in an appropriate way by qualified personnel. At the end of the life cycle, take it to a proper recycling or disposal center or return it to the dealer so that it can be disposed correctly.
Do not connect the heater to the outdoor unit and do not install remodeled duct as you please.
- The capacity of the air conditioner may reduce, electric shock or fire may occur and it has a chance of occurrence of and accident like electric shock or fire.
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 power cable and communication cable of the indoor and outdoor unit at least 1.5m(5ft) away from electric appliances.
- Noise may hear depending on the electric wave though the cables are installed away from electric appliances.
Install the indoor unit away from lighting apparatus using the ballast.
- If you use the wireless remote control, it may not operate normally.
The air conditioner should be used only for the applications for which it has been designed: the indoor unit is not suitable to be installed in areas used for laundry.
Our units must be installed in compliance with the spaces indicated in the installation manual to ensure either accessibility from both sides or ability to perform routine maintenance and repairs. The units’ components must be accessible and that can be disassembled in conditions of complete safety either for people or things.
For this reason, where it is not observed as indicated into the Installation Manual, the cost necessary to reach and repair the unit (in safety, as required by current regulations in force) with slings, trucks, scaffolding or any other means of elevation won’t be considered in-warranty and charged to end user.
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Locating the Units
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Deciding on Where to Install the Outdoor Unit
Decide the installation location regarding the following condition and obtain the user’s approval.
The 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.
Choose a location that is dry and sunny, but not exposed to direct sunlight or strong winds.
Do not block any passageways or thoroughfares.
Choose a location where the noise of the air conditioner when running and the discharged air do not disturb any neighbours.
Choose a position that enables the pipes and cables to be easily connected to the indoor unit.
Install the outdoor unit on a flat, stable surface that can support its weight and does not generate any unnecessary noise and vibration.
Position the outdoor unit so that the air flow is directed towards the open area.
Place the outdoor unit where there are no plants and animals because they may cause malfunction of outdoor unit.
Maintain sufficient clearance around the outdoor unit, especially from a radio, computer, stereo system, etc.
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, make sure to apply anti-corrosion coating on the heat exchanger.
- 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.
Sea breeze
Outdoor unit
Sea breeze
Outdoor unit
Sea Sea
- If you cannot avoid installing the outdoor unit by the seashore, construct a protection wall around to block the sea breeze.
Protection wall
Sea
Sea breeze
Outdoor unit
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(2.3ft) between the protection wall 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.
Do not install the air conditioner 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 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 danger of existing combustible gas, carbon fiber or flammable dust.
The place where thinner or gasoline is handled.
CAUTION
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(19.4°F) 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.
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Locating the Units
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REPARING THE
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Indoor Unit
Remote Control
Breaker
Breaker
Stereo
1m
(3
.28
ft)
o r m or e
1.5m
(5ft
) or
mo re
1.5m
(5ft
) or
mo re
3m(10 ft) or m ore
Outdoor
Unit
If the outdoor unit is installed at a height, ensure that its base is firmly fixed in position.
Make sure that the water dripping from the drain hose runs away correctly and safely.
If the paint on the cabinet comes off during installation, make sure to re-paint or protect damaged area to prevent rust. If the cabinet becomes rusted, it may reduce durability of the outdoor unit.
CAUTION
You have just purchased a system air conditioner and it has been installed by your installation specialist.
This device must be installed according to the national electrical rules.
With an outdoor unit having net weight upper than 60kg(132.3lb), we suggest do not install it suspended on wall, but considering floor
standing one.
Avoid 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.
If you install the outdoor unit by the sea or a spa, concern about corrosion.
Build a support where may have a heavy snow so that the air intake is not blocked by snow.
Install a protective safety fence to eliminate the possibility of falling.
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Locating the Units (Continued)
Space Requirements for Outdoor Unit
Observe the clearances and dimensions as seen below when installing the outdoor unit.
If you install several outdoor units simultaneously, observe the space for ventilation and free airflow.
If the space for ventilation is insufficient, the air conditioner may be inefficient.
SAMSUNG logo is attached on the front side of the outdoor unit.
Figure Description
Top view Side view
Back side: Air intake
Front side:
Air outlet
Back side:
Air intake
Front side: Air outlet
, Air flow direction.
When installing 1 outdoor unit
When the air outlet is opposite the wall
Unit : mm(inch)
When the air outlet is toward the wall
When 3 sides of the outdoor unit are blocked by the wall
The upper part of the outdoor unit and the air outlet is toward the wall
2000(80) or more
150(6) or more 600(24) or more
The upper part of the outdoor unit and the air outlet is opposite the wall
300(12) or more
When the walls are blocking front and the rear side of the outdoor unit
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Locating the Units (Continued)
When installing more than 1 outdoor unit
When the air outlet is toward the wall
Unit : mm(inch)
600(24) or more
600(24) or more
When 3 sides of the outdoor unit are blocked by the wall
300(12) or more 600(24) or more 600(24) or more 600(24) or more
When the walls are blocking front and the rear side of the outdoor units
600(24) or more 600(24) or more
When front and rear side of the outdoor unit is toward the wall
1500(60) or more
600(24) or more 3000(120) or more 3000(120) or more 300(12) or more
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Locating the Units (Continued)
Selecting Outdoor Unit Combination
Install the indoor unit only for R410a.
Outdoor unit
(Series)
RD040MHXCA
RD050MHXCA
Capacity of the outdoor unit (Btu/h)
36,000
48,000
Maximum of connected indoor units
6
8
Total capacity of connected indoor units (Btu/h)
20,000~45,000
27,000~60,000
You may connect indoor units within 50~130% of the outdoor unit capacity.
Smallest indoor unit(7,500Btu/h) was used to calculate ‘Maximum of connected indoor units’.
Connect maximum 6 to 8 indoor units to the selected outdoor unit.
Total capacity of connected indoor units must be within the capacity of outdoor unit.
If all indoor units operate simultaneously when total capacity of indoor units exceeds 100% of the outdoor unit, actual capacity of each indoor unit may be reduced a little as compared with its rated capacity.
Tools Required for Installation
General Tools
Vacuum Pump(Backward flowing prevention)
Stud Finder
Reamer
Screw Driver
L Wrench
Torque Wrench
Pipe Bender
Spanner
Measuring Tape
Tools for test operations
Thermometer Resistance Meter
Manifold Gauge
Pipe Cutter
Spirit Level
Drill
Electroscope
Moving the Outdoor Unit
Select the moving route.
Secure the strength of the carrying path to resist against the weight of the outdoor unit.
Do not slant the product more than 30˚ 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.
When moving with a crane or straps
In case of placing the outdoor unit on a high ground such as rooftop
- Fasten the wire rope as seen in the picture.
- Move the product with its package on, to prevent any damages caused by the rope.
Wire rope/straps
Wood palette
When moving by installation personnel
When the moving distance of the product is close enough for installation personnel to carry
- 2 people should move the product using the carry handle as shown in the picture.
- Be careful not to damage the heat exchanger.
- Be careful not to get injured by the sharp edge of the heat exchanger.
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Locating the Units (Continued)
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Disassembling the Leg Base and Wood Palette /
Fastening the Anchor Bolt
1 Disassemble the three screws (with an electric driver) which fixes wood palette.
2 Disassemble the bottom-left screw with monkey spanner.
Do not remove guard fan.
3 After removing the wood palette, move the outdoor unit to the installation place.
4 Fasten the bottom-left screw with monkey spanner first, and then fasten the other three anchor bolts.
Screw
Wood palette
Monkey spanner
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Locating the Units (Continued)
Drain hole
Unit : mm(inch)
150(6) or more
< When installing on the ground >
Install the outdoor unit horizontally on the ground
150(6) or more
< When installing on the roof >
Base mount construction
Installing the Outdoor Unit
CAUTION
Do not install the outdoor unit on a wood palette.
Fix the outdoor unit completely to the base surface with anchor bolts.
The manufacturer is not responsible for the damage occurred by not keeping standard of the installation.
Install the outdoor unit higher than 150mm(6in) from the base surface and install the drain hole to connect the pipe to the drainage.
If forward fan outdoor unit is installed where has average fallen snow
150mm(6in) over, outward duct should be attached to the outdoor unit.
The concrete foundation should be 1.5 times larger than bottom of the outdoor unit.
When heating, condensed water may be generated. Pay attention to waterproof and drainage of the concrete foundation where the outdoor unit is installed. (An ice road may form on the base surface in winter.)
Make up for wire mash or steel bar so that the outdoor unit is not damaged or broken when installing concrete foundation.
When installing the outdoor units in same place simultaneously, install the
H beam inside concrete foundation. (When installing a number of outdoor unit, you can install it on the concrete foundation.)
Install the H beam(150mm x 150mm x t10 (6inch x 6inch x t 3/8 inch) : basic specification) to jut out from the concrete foundation.
After installing the H beam, apply corrosion protection.
Install a square pad(t=20mm(3/4 inch) or more) 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 and fix it with the bolt, nut and washer.
Outdoor unit
Anchor bolt
Nut, Spring washer
20mm
(3/4 inch)
Square pad
H beam
A
75mm(3inch)
A+10~20mm(3/8~3/4 inch) or more
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Locating the Units (Continued)
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Outdoor unit base mount and anchor bolt position
Unit : mm(inch)
Anchor bolt position
(ø7, 4 holes )
670(26-3/8)
932(36-11/16)
CAUTION
When tightening the anchor bolt
Tighten the rubber washer to prevent the outdoor unit bolt connection part from corroding.
Iron washer
Rubber washer
Installing the drain pipe
When installing 1 outdoor unit When installing more than 1 outdoor unit
Outdoor unit
(Rear side)
Outdoor unit
(Rear side)
Outdoor unit
(Rear side)
Outdoor unit
(Rear side)
Open to air Open to air
Drain plug More than
1/50 slope
Drain plug
Insulation
More than 1/50 slope Drain pipe covered with insulation
Open the upside of connected parts of outdoor units to prevent inner pressure.
Do not place a trap on the concentrated pipe. And install the drain pipe horizontally with a slope of 1/50 or more.
Insulate the drain pipe and drain plug by using the insulation over 10mm(3/8inch).
Install a self-regulation heat cable to prevent the drain pipe from freezing.
Drain pipe
Caution When Installing Cover for Heating Air Direction Change
Parts shown in the picture is where the copper pipe may be passing by or the external plate may be near the copper pipe. When using screw for installing the air direction changing device such as heating air cover, check and make sure that it does not damage the copper pipe.
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< Internal view from bottom>
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Installing the Refrigerant Pipe Work
WARNING
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.
Install the refrigerant pipe within the maximum allowable length, difference in height and length of after the first branch pipe.
The pressure of the R410a is high.
Use only rated refrigerant pipe and follow the installation method.
Use clean refrigerant pipe which there is no harmful ion, oxide, dust, iron content or moisture.
Use tools and accessories fit on R410a.
Manifold gauge Use manifold gauge only for R410a to prevent the inflow of foreign substances.
Vacuum pump
Flare nut
Use vacuum pump with check valve to prevent pump oil from flowing backward while the vacuum pump is stopped.
Use the vacuum pump that the vacuum induction is available up to 5Torr (666.6Pa, 5mmHg).
Use only flare nut supplied with the product.
Allowable Length of the Refrigerant Pipe and the Installation Examples
Using only Y-joint
Outdoor unit
Indoor unit
Y-Joint
EEV kit
Using EEV kit
Outdoor unit
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Using only Y-joint Using EEV kit
Maximum allowable length of pipe
Maximum allowable height
Outdoor unit~
Indoor units
Outdoor unit~
Indoor units
Maximum allowable
Actual length
Equivalent
Length
Main Pipe
Length
Total Length
Height
Height length after the first Y-joint Actual length
The distance between the outdoor unit and the furthest indoor unit ≤
120m(70m)(393-11/16ft(229-11/16ft)) ex) 8 Indoor units a+b+c+d+e+f+g+p ≤
120m(70m)(393-11/16ft(229-11/16ft)) ex) 6 Indoor units a+b+c+d+j ≤ 120m(70m)(393-
11/16ft(229-11/16ft))
The distance between the outdoor and the furthest indoor unit ≤
135m(85m)(442-15/16ft(278-7/8ft))
The equivalent length of Y-joint and EEV kit : 0.5m(1-5/8ft)
Main Pipe (= a) before first Y-joint have to be less than
80m(50m)(262-7/16ft(164-1/16ft))
The sum of total pipe length have to be less than
300m(200m)(984-1/4ft(656-3/16ft))
H1: Difference of height between the outdoor unit and indoor unit : ≤ 30m(98-
7/16ft)When the outdoor unit is lower : ≤ 25m(82ft)
H2: Difference of height among the indoor units : ≤ 15m(49-3/16ft)
The distance between the first Y-joint and the indoor unit ≤40m(131-1/4ft) ex) 8 Indoor units : b+c+d+e+f+g+p ≤ 40m(131-1/4ft)
Allowable length between EEV kit and
Indoor unit less than 20m(65-5/8ft) ex) h, i, j ≤ 20m(65-5/8ft)
Value within the parentheses ( ) is a recommended length. Contact the manufacturer if the length should exceed.
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Installing the Refrigerant Pipe Work
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Selecting the Refrigerant Pipe
Installing pipes between outdoor unit and first Y-joint
Outdoor unit capacity
(HP)
4
Liquid side (O.D.) Gas side (O.D.) Gas side size up mm inch mm inch mm inch
ø9.52
ø3/8 ø15.88
ø5/8 ø19.05
ø3/4
5 ø9.52
ø3/8 ø15.88
ø5/8 ø19.05
ø3/4
Install refrigerant pipe depending on the outdoor unit capacity.
Use the copper pipe of semi-hard(1/2H) when installing Ø19.05 of the pipe.
If you use Soft(O) pipe, the internal pressure is too low to cause personal injury.
When the length of liquid pipe is longer than 70m(229-11/16 ft), step up the size of gas pipe.
Installing pipes between Y-joints
Indoor unit total capacity (Btu/h)
X < 69000
Liquid side mm
ø9.52
inch
ø3/8
Gas side mm
ø15.88
inch
ø5/8
Selecting the Y-joint
Select the first Y-joint depending on the outdoor unit capacity.
Select the other Y-joints depending on the total capacity of attached indoor units below the selected joint individually.
Selecting the first Y-joint
Outdoor capacity (HP) Y-joint model
4, 5 MXJ-YA1509K
The other Y-joint
Total capacity of attached indoor units below this Y-joint (kW)
X < 20.2
Y-joint model
MXJ-YA1509K
Outer diameter
Minimum thickness mm inch mm inch
ø 6.35
ø1/4 0.7
0.027
ø 9.52
ø3/8
ø12.70 ø1/2
0.7
0.8
0.027
0.031
ø15.88 ø5/8
ø19.05 ø3/4
ø22.23 ø7/8
1.0
0.039
0.9
0.9
Temper grade
C1220T-O
(Soft)
0.035 C1220T-1/2H
0.035
(Semi-hard)
Make sure to use C1220T-1/2H pipe for more than
ø19.05mm(3/4'').
In case of using C1220T-O pipe for
ø19.05mm(3/4'') pipe may be broken, which
can result in an injury.
Keeping Refrigerant Pipe Clean and Dry
To prevent foreign materials or water from entering the pipe, it is important to keep the refrigerant pipe and to seal it while installing.
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Installing the Refrigerant Pipe Work (Continued)
Pipe
Pipe cutter
Cutting or Flaring the Pipes
1 Make sure that you have the required tools available.
(pipe cutter, reamer, flaring tool and pipe holder)
2 If you wish to shorten the pipes, cut it with a pipe cutter, taking care to ensure that the cut edge remains at a 90° angle with the side of the pipe. Refer to the illustrations below for examples of edges cut correctly and incorrectly.
Oblique Rough Burr
Pipe Burr
Pipe Flare
Pipe cutter
3
To prevent a gas leak, remove all burrs at the cut edge of the pipe using a reamer.
CAUTION Face the pipe down while removing the burrs to make sure that burrs do not get in to the pipe.
4
Put a flare nut slightly into the pipe and modify the flare.
Outer Diameter (D) mm
ø6.35
ø9.52
ø12.70
ø15.88
ø19.05 inch
ø1/4
ø3/8
ø1/2
ø5/8
ø3/4 mm
1.3
1.8
2.0
2.2
2.2
Depth (A) inch
0.051
0.071
0.079
0.087
0.087
Flaring Size (B) mm
9.0
13.0
16.2
19.3
22.5
inch
0.354
0.512
0.638
0.760
0.886
5 Check that the flaring is correct, referring to the illustrations below for examples of incorrect flaring.
Apply frozen oil Flare nut
Indoor outlet pipe Connecting pipe
Oblique Damaged
Surface
Cracked Uneven
Thickness
6 Align the pipes to connect them easily. Tighten the flare nuts first with your hands, and then with a torque wrench, applying the following torque:
Outer Diameter
ø6.35 mm(ø1/4inch)
ø9.52 mm(ø3/8inch)
ø12.70 mm(ø1/2inch)
ø15.88 mm(ø5/8inch)
ø19.05 mm(ø3/4inch)
Torque (kgf•cm)
140~170
250~280
380~420
440~480
990~1210
Note Excessive torque can be cause of gas leakage.
CAUTION
In case of welding the pipe, you must weld with Nitrogen gas blowing.
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Installing the Refrigerant Pipe Work (Continued)
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Selecting the Insulation of the Refrigerant Pipe
Insulate the gas side and liquid side pipe referring to the thickness according to the pipe size.
The thickness according to the pipe size is a standard of the indoor temperature of 27°C (80.6°F) and humidity of 80%. If installing in an
unfavorable conditions from it, use thicker one.
Pipe size
(mm(inch))
Minimum thickness of insulation (mm(inch))
PE foam EPDM foam
Remarks
ø6.35~ø19.05
(ø1/4~ø3/4)
ø22.23(ø7/8)
-
13(0.512)
19(0.748)
25(0.984)
10(0.394)
13(0.512)
19(0.748)
If you install the pipe underground, at the seaside, a spa or on the lake, use thicker one according to the pipe size.
Refrigerant pipe before EEV kit or without EEV kit
You can contact the gas side and liquid side pipes but the insulation should not be pressed.
When contacting the gas side and liquid side pipe, use thicker insulation.
Refrigerant pipe after EEV kit
When installing the gas side and liquid side pipes, leave 10mm of space.
When contacting the gas side and liquid side pipe, use thicker insulation.
CAUTION
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.
Insulating the Refrigerant Pipe
You must check if there is a gas leak before completing all the installation process.
Use EPDM insulation which meets the following condition.
Remarks Item
Density
Dimension change route by heat
Water absorption rate
Thermal conductivity
Moisture transpiration factor
Moisture transpiration grade
Formaldehyde dispersion
Oxygen rate
Unit g/cm²
% g/cm² kcal/m·h·˚C ng/(m²·s·Pa)
{g/(m²·24h)} mg/L
%
Standard
0.048~0.096
-5 or less
0.005 or less
0.032 or less
15 or less
15 or less
-
25 or less
KSM 3014-01
KSL 9016-95
KSM 3808-03
KSA 1013-01
KSF 3200-02
ISO 4589-2-96
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
Gas side pipe
Liquid side pipe
Clamp
Indoor unit
Insulation
Insulation
Liquid pipe
Gas pipe
10mm 10mm 10mm
Gas pipe
Indoor unit
Liquid pipe
Insulation Overlapped
Install the insulation to be overlapped
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Installing the Refrigerant Pipe Work (Continued)
Brazing part
1/4" copper pipe
Nitrogen gas
Pressure regulator
Taping
Valve stem
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.
Replacement 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 in the pipe. It can cause the damage of the compressor and valves.
3 Adjust the flow rate of the replacement with a pressure regulator to maintain
0.05m
3 /h(1.77ft
3 /h) or more.
4 Perform brazing of the service valve after protecting the valve.
Installing the Y-Joint
Install the Y-joint ‘horizontally’ or ‘vertically’.
< Install horizontally>
< Install vertically>
CAUTION
Make certain of a minimum distance in straight line.
Rear
To other branching pipe or indoor unit
Pipe in use on the site
Rear
Socket
Front
To outdoor unit
Gas/Liquid side Y-joint
Pipe in use on the site
Maintain ±15° start from the horizontal line
Install the Y-joint within ±15° from the horizontal or vertical line.
Main pipe 500mm
(19-11/16inch) or more
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Installing the Refrigerant Pipe Work (Continued)
Connecting the Outdoor Unit Pipe
Conduct a pipe work within maximum allowable length, height and length after branching.
Make sure to have no crack on the bended parts of pipe.
4HP ~ 5HP Outdoor unit
Gas side
Liquid side
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Installing the Refrigerant Pipe Work (Continued)
Performing the Refrigerant Gas Leak Test
Use tools for R410a to prevent the inflow of foreign substances and resist against the internal pressure.
Pressure test with dry Nitrogen gas only.
Apply pressure to the liquid side pipe and gas side pipe 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 Nitrogen 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.
Manifold gauge
Low pressure side High pressure side
Gas side pipe
Service port
Liquid side pipe
Nitrogen gas
Pressure adjustment valve
(mandatory)
CAUTION
You may get injured when the joint on the high pressure side detaches and the gas comes in contact with your body. Make sure to tighten the joint to prevent such accidents.
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Installing the Refrigerant Pipe Work (Continued)
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Vacuum Drying
Use the tools for R410a to prevent the inflow of foreign substances and resist against the internal pressure.
Use the vacuum pump with the check valve to prevent pump oil from flowing backward while the vacuum pump is stopped.
Vacuum system to 5Torr (666.6Pa, 5mmHg, 0.0967psi).
Close the service valve of the liquid side pipe and gas side pipe completely.
Manifold gauge
Low pressure side
Gas side pipe
High pressure side
Connect the manifold gauge to the liquid side pipe and gas side pipe.
Perform vacuum drying of the liquid side pipe and gas side pipe using the vacuum pump.
Service port
Liquid side pipe
Vacuum pump
Make sure that install check valve to prevent pump oil from flowing into the pipe.
Perform vacuum drying for 2 hours and
30 minutes or more.
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 checking the vacuum gauge pressure has reached at 5Torr
(0.0967psi).
Check the vacuum pressure using the vacuum gauge.
Check for gas leakage
Yes
Pressure Increase
Since there is water in pipeline, the pressure increases and vacuum condition is broken.
Exert pressure using 0.05Mpa (7.25psi) nitrogen.
No
Vacuum desiccate again, to reach 5Torr
(666.6Pa, 5mmHg, 0.0967psi).
(2 hours and more)
Fill refrigeration agent
No
Pressure Increase
Yes
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Installing the Refrigerant Pipe Work (Continued)
Selecting Additional Refrigerant Charge
Basic charge
The basic amount of refrigerant for outdoor unit charged in factory is :
Outdoor unit (Series)
RD040MHXCA
RD050MHXCA
Factory charge(kg(lb))
4.0(8.82)
Charge additional refrigerant according to the total length of the pipe.
Depends on the total length of the liquid side pipe.
Additional Charge (g) = {(L1(m)x20(g/m)) + (L2(m)x50(g/m))}
(oz) = {(L1(ft)x0.215(oz/ft)) + (L2(ft)x0.54(oz/ft))}
L1(m(ft)): Total length of liquid pipe Ø 6.35(Ø1/4)
L2(m(ft)): Total length of liquid pipe Ø 9.52(Ø3/8)
Refrigerant Charging
Additional charging
Additional Refrigerant calculation only related with liquid pipe length
Basic refrigerant for outdoor unit already has been charged
Additional charge calculation = (Sum of total length(m) of Φ9.52)x50g +
(Sum of total length(m) of Φ6.35)x20g
= (Sum of total length(ft) of Φ9.52)x0.54oz +
(Sum of total length(ft) of Φ6.35)x0.215oz
ex) a(Φ9.52)=40m(131.2ft), b+c+d(Φ9.52)=15m(49.2ft),e+f+g(Φ6.35)=15m(49.2ft)
Additional charge = 55mx50g + 15mx20g = 3050g
= 180.4ftx0.54oz + 49.2ftx0.215oz = 108oz
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Installing the Refrigerant Pipe Work (Continued)
Adding Refrigerant
The R410a refrigerant is blended refrigerant. Add only liquid refrigerant.
Measure the quantity of the refrigerant depending on the length of the liquid side pipe. Add fixed quantity of the refrigerant using a scale.
※ Adding the cooling refrigerant
Manifold gauge
Low pressure side
High pressure side
Outdoor unit
Gas side Liquid side
Suction charging
Scale
※ Adding the heating refrigerant
Manifold gauge
Low pressure side
Service valve
High pressure side
Outdoor unit
Gas side Liquid side
Suction charging
Scale
Service valve
Connect the manifold gage and purge the manifold gage.
Open the manifold gauge valve of the liquid side service valve and add the liquid refrigerant.
If you cannot fully recharge the additional refrigerant while the outdoor unit is stopped, use the key on the outdoor unit PCB to recharge the remaining refrigerant. (Refer to page 32.)
Adding the cooling refrigerant
1) Press the function key for adding refrigerant in cooling mode.
2) After 20 minutes of operation, open the valve on gas side.
3) Open the valve for low pressure side on the manifold gage to recharge the remaining refrigerant.
Adding the heating refrigerant
1) When recharging the heating refrigerant, connect the low pressure pipe from manifold gage to the suction charging port.
2) Press the function key for adding refrigerant in heating mode.
3) After 20 minutes of operation, open the valve on suction charge port.
4) Open the valve for low pressure side on the manifold gage to recharge the remaining refrigerant.
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.)
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Installing the Refrigerant Pipe Work (Continued)
Service port
Cap
Valve stem
Sealing edge
To Close the Valve Stem
1 Open the cap and turn the valve stem clockwise by using a hexagonal wrench.
2 Tighten the valve stem until it reached the sealing edge.
Note Do not apply excessive force to the valve stem and always use special instruments. Otherwise, the contact surface between valve stem and sealing edge can be damaged and refrigerant can leak through this damaged surface.
If refrigerant would leak, turn the valve stem back by half and tighten the valve stem again, then check the leakage. If there is no leakage any more, tighten the valve stem entirely.
3 Tighten the cap securely.
To Open the Valve Stem
1 Remove the cap.
2 Turn the valve stem counterclockwise by using a hexagonal wrench.
3 Turn the valve stem until it is stopped.
4 Tighten the cap securely.
CAUTION
When you use the service port, always use a charging hose, too.
Check the leakage of refrigerant gas after tightening the cap.
Must use a spanner and wrench when you open/tighten the valve stem.
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Electrical Connections
WARNING
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.
The electric work must be done by service agent or similarly qualified persons according to national wiring regulations and use only rated cable.
- If the capacity of the power cable is insufficient or electric work is not properly completed, electric shock or fire may occur.
Make sure there is no leakage after installation.
- Toxic gas may generate when refrigerant gas contacts with fire.
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.
The installation must be done by the manufacturer or its service agent or a similar 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 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(1/8in).
Switch off the main circuit breaker and the branch circuit breaker before electric work.
Perform earthing work 3 without fail. An earthing resistance should be under 100Ω.
The protective earthing resistance can be applied in case of using ELCB (Earth Leakage Circuit
Breaker). When using an ELCB that has a tolerance limit as 100mA per second, the protective earthing resistance is 250Ω in an electrical danger zone, else under 500Ω.
The input voltage of the indoor and outdoor unit should be within ±10% of the rated one.
For details of wiring, refer to the circuit diagram attached onto the outdoor unit.
The circuit diagram for wiring shows only the concept.
Do not connect the heater to the outdoor unit and do not install remodeled duct as you please.
- The capacity of the air conditioner may reduce and electric shock or fire may occur.
Install the power cable and communication cable of the indoor and outdoor unit at least 1.5m(5ft) away from electric appliances.
- Noise may hear depending on the electric wave though the cables are installed away from electric appliances.
Install the indoor unit away from lighting apparatus using the ballast.
- If you use the wireless remote control, it may not operate normally.
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Electrical Connections (Continued)
Overall System Configuration
Connection of the power cable (1 phase 2 wires)
Outdoor unit Distribution board
1 phase
2 wires
208V-230V~
ELCB
Or
MCCB+
ELB
1 phase
2 wires
208V-230V~
Or
MCCB+
ELB
ELCB
Indoor unit
220V
Earth
Communication cable
Wired remote controller
Connection of the power cable (1 phase 2 wires using Electronic Expansion Valve kit)
Distribution board Outdoor unit Indoor unit
1 phase
2 wires
208V-230~
ELCB
Or
MCCB+
ELB
1 phase
2 wires
208V-230V~
Or
MCCB+
ELB
ELCB
Earth
Wired remote controller
Earth
Communication cable
EEV kit
CAUTION
Install cabinet panel near the outdoor unit for the convenience of service and emergency operation off.
Make sure to install the circuit breaker with the over-current and electric leakage protection.
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Electrical Connections (Continued)
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Specification of Electronic Wire of the Outdoor Unit
Outdoor unit
RD040MHXCA
Series
RD050MHXCA
Series
Power
Supply
208V-230V~/60Hz
Max/Min(V)
Max.
Current
187/253
208V-230V~/60Hz 187/253
28.0
30.0
MCCB+ELB(A) or ELCB(A)
40
Power cable
(mm 2 (inch 2 ))
CV VV
4(0.006) 6(0.009)
Earth cable
(mm 2 (inch 2 ))
Max Length
(m (ft))
6(0.009) 18(59)
40 4(0.006) 6(0.009) 6(0.009) 18(59)
The power cable is not supplied with the air conditioner.
MCCB : Molded Case Circuit Breaker, ELB : Earth Leakage Breaker.
ELCB:Earth Leakage Circuit Breaker.
Specification of Electronic Wire of the Indoor Unit
Power Supply
Power Supply (1 Phase)
Max/Min(V)
Power cable
(mm 2 (inch 2 ))
Max length
Earth Cable
(mm 2 (inch 2 ))
Communication cable (mm 2 (inch 2 ))
208-230V~/60Hz 187/253 2.5(0.0038)
Decided by power drop among indoor units
2.5(0.0038)
0.75~1.25
(0.0012~0.0019)
Select the thickness and length of power cable for total drop of electric pressure to be less than
10%(On 208V-230V~ lnput voltage basis).
CAUTION
You should connect the power cable into the power cable terminal and fasten it with a clamp.
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 in the iron pipe.
Must keep the cable in a protection tube.
Keep distances of 50mm(2inch) or more between power cable and communication cable.
Each indoor unit should be supplied between maximum and minimum voltage values(253V~187V).
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Electrical Connections (Continued)
Power Wiring and Communication Wiring Configuration
Be sure to run the power supply cable and the communication cable through electrical conduit as seen in the picture.
Install the communication cable, indoor power cable and the main power cable in the cable tube.
Secure the cable tube to the outdoor knockout using the CD connector and bushing.
Arrange the cables as shown in the picture.
The diameter of the 6 knock-out holes is Ø27.8 mm(Ø1-3/32 inch).
(Inside)
Communication cable
Main power cable
CAUTION
Make a knockout hole by driving in a nail.
When installing the cables through the knockout hole, remove all burrs and protect them with the protection tape.
Apply rust resisting paint around the hole.
(Outside)
1 phase 2 wires (208V-230V~)
1 phase 208V-230V~
��
�����
���
Earth cable
(U-Trap)
Power cable
Communication cable between indoor and outdoor units
Earth
CAUTION
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(3/4inch) into the electrical parts.
Communication wiring should be done separately from the power cable and other communication cables.
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Electrical Connections (Continued)
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Installing the Transmitter (MIM-B13A)
RD040/050MHXCA MAIN PBA
MAIN + SUB Communication Line
DC12V
Supply
DC5V
Supply
Settings of Adapter Address
Channel 0
Adapter Main PCB
DIP 1
Turn off 12V, 5V Supply
Controlling Unit
Outdoor Unit
CAUTION
When installation is carried out, the distance between the first and last transmitter should be kept within 1000m(3280.84ft).
Turn off the power supply before installation.
Follow the electric wiring safety standards when electrical wire is installed, and to avoid danger to users, the wire should pass through the wall.
Installating the Operation Mode Selection Switch (MCM-C200)
Housing Connection Method:
When connecting the wire, as shown in the picture, push down after inserting minus-driver in housing-home. (To avoid pressure upon the coating part, only the exposed section should be inserted)
Assembly
Drawing
Wire Diagram
Refrigeration
Automation
Heating
Switch for Refrigeration &
Heating PCB
To Buy Electrical
Wire on the Spot
Blue
White
Red
K5 (Refrigeration)
Automation
K6 (Heating)
Outdoor Unit
PCB
CAUTION
Operation mode selection switch cannot operate normally when improper connection occurs.
Carry out the installation at a position within 18m(59ft) of the outdoor unit, and apply safe external connection only to the operation mode selection switch (MCM-C200).
Connection to any other switch extender is forbidden.
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Electrical Connections (Continued)
When using the terminal for earthing only
Earth terminal
When using earthing of the switchboard
Distribution Board
Connecting the Power Terminal
Connect the cables to the terminal board using the compressed ring terminal.
Connect the rated cables only.
Connect using a wrench 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.
Tightening Torque (kgf.cm(lb.ft))
M4 12.0~14.7(0.86~1.06)
M5 24.4~29.8(1.76~2.15)
Installing the Earth Wire
Earthing must be done by your installation specialist for your safety.
Use the earth wire by referring to the specification of the electric cable for the outdoor unit.
Earthing the power cable
The standard of earthing may vary according to the rated voltage and installation place of the air conditioner.
Earth the power cable according to the following.
Installation
Power condition place
Electrical potential of lower than 150V
Electrical potential of higher than 150V
High humidity Average humidity
Perform the earthing work 3.
Note 1)
Must perform the earthing work 3.
(In case of installing circuit breaker)
Low humidity
Perform the earthing work 2 if possible for your safety.
Note 1)
Note 2)
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.)
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Setting the Option Switch and Function of the Keys
Option Switches in PBA of the Outdoor Unit
※ Main PBA
Display Key Dip switch
Rotary switch
C
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Key Function of the Outdoor Unit PBA
※ Display ※ KEY
Check mode
※ Function of KEY
Number of pressing
1
2
3
4
5
K1 (Heating)
RESET View mode
Adding refrigerant in heating mode ( )
Test operation for heating ( )
Heating Pump out operation ( )
Vacuum(All)(t 4) ( )
End of key operation
K2 (Cooling)
Adding refrigerant in cooling mode ( )
Test operation for cooling ( )
Cooling Pump down operation ( )
End of key operation
-
Adding refrigerant ( , ): The operation for charging additional refrigerant
Test operation ( , ): Checking the indoor and outdoor unit operation
Recovery of refrigerant ( ): Operation for collecting refrigerant to the outdoor unit when moving or repairing the outdoor unit .
Refrigerant release ( ): Operation for releasing the refrigerant on the outdoor unit to the indoor unit pipes.
※ Function of K4
Number of pressing
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Display contents
Press for 5 seconds
Current frequency
Target frequency
Outdoor temperature
Discharge Temp
OLP Temp
Cond out Temp
Double pipe Out Tube Temp(Tsc)
High Pressure
Current Fan RPM
Double pipe EEV
Main EEV
Current
Number of connected indoor units
Number of operating indoor units
Total capacity of operating indoor units
D
E
B
C
F
9
A
7
8
5
6
3
4
SEG 1 SEG 2,3,4
Display
SW version display
1
2
0, 3, 0
0, 3, 0
Contents
SW version
Display current frequency
30Hz
0, 3, 0
1, 0, 5
1, 0, 5
0, 4, 5
0, 4, 5
3, 2, 1
7, 0, 0
1, 8, 0
1, 5, 0
1, 5, 0
0, 1, 0
0, 1, 0
1, 2, 0
30˚C
105˚C
105˚C
45˚C
45˚C
3.21MPa
700RPM
180Step
1500Step (Full open position)
4/5HP: 30A(15x2)
10
10
120
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Setting the Option Switch and Function of the Keys (Continued)
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Indoor Unit Setup Range
Outdoor unit
RD040MHXCA Series
RD050MHXCA Series
Maximum of connected indoor units
6
8
For example: Set the SW01 to '0' ans SW02 to ‘3’ if 3 indoor units are installed.
Tens digit Unit digit
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K5 K6 K7 K8 K9 K10K11 K12 K13 K14K15 K16
Dip Switch Setup
Switch No.
K5
ON
OFF
Function (Communication Tracking)
Set indoor unit address manually
Set indoor unit address automatically
Switch No.
K7 K8
ON ON
ON
OFF
OFF
OFF
ON
OFF
Switch No.
K9 K10
ON
ON
OFF
OFF
ON
OFF
ON
OFF
Function (Cooling capacity compensation)
No Cooling Frequency compensation (Default)
Frequency compensation 105% (frequency*compensation value)
Frequency compensation 110% (frequency*compensation value)
Frequency compensation 115% (frequency*compensation value)
Function (Night silence)
Not use Night silence (Default)
Night silence Step_1
Night silence Step_2
Night silence Step_3
Switch No.
K11 K12
ON ON
ON
OFF
OFF
OFF
ON
OFF
Standard:30MPa(4351.14psi)
Function (Heating capacity compensation)
No high pressure target (Default)
High pressure target (standard -0.2MPa(-29psi))
High pressure target (standard -0.1MPa(-14.5psi))
High pressure target (standard +0.1MPa(+14.5psi))
Switch No.
K13 K14
ON ON
ON OFF
Function (Current limit setting)
Current limit(Default)
Current limit(Option)
Maximum running current
4HP 5HP
28A 30A
26A 28A
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Pump Down Procedure
Objective of Pump Down
For product repairs and indoor unit relocation, pump down operation must be done to collect the refrigerant to the outdoor unit and minimize the leakage within system.
Cautions When Performing Pump Down
Product limits amount of refrigerant in the outdoor unit due to slim design.
Collect the majority of the refrigerant in the system in an empty refrigerant vessel and perform a pump down operation with remaining refrigerant. Maximum amount of refrigerant is 5kg(11lb).
If the amount of refrigerant exceeds maximum allowable limit, increased pressure may cause compressor trip or a burn out.
Pump Down Procedure
1 Fill an empty refrigerant before performing pump down operation.
2 Close the manifold gauge.
3 Close the liquid side service valve.
4 Press the K2 button on the outdoor unit PCB three times.
( will be displayed on outdoor unit PCB LED.)
5 Observe low pressure side using manifold gauge when the compressor moves.
6 When the pressure on low pressure side decrease below 0kg/cm 2 g(0psig),g close the gas side service valve and end the pump down operation.
( To end the pump down operation, press the K2 button once more or press K3 button to reset.)
CAUTION
Use an exclusive rechargeable refrigerant vessel when collecting the refrigerant. Using modified refrigerant vessel may cause explosion and cause damage or personal injury.
Note Relocation of the air conditioner
Refer to this procedure when the unit is relocated.
Carry out the pump down procedure (refer to the details of ‘pump down’).
Collecting refrigerant may be hard, since multi type products exceeds allowable charging amount of refrigerant in the outdoor unit to support long piping. (Refer to page 35.)
Remove the power cord.
Disconnect the assembly cable from the indoor and outdoor units.
Remove the flare nut connecting the indoor unit and the pipe.
At this time, cover the pipe of the indoor unit and the other pipe using a cap or vinyl plug to avoid foreign material entering.
Disconnect the pipe connected to the outdoor unit.
At this time, cover the valve of the outdoor unit and the other pipe using a cap or vinyl plug to avoid foreign material entering.
Make sure you do not bend the connection pipes in the middle and store together with the cables.
Move the indoor and outdoor units to a new location.
Remove the mounting plate for the indoor unit and move it to a new location.
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Pump Down Procedure (Continued)
Collecting Refrigerant in Refrigerant Vessel Before
Pump Down Operation
If the amount of refrigerant in the system exceeded the maximum allowable limit, reduce the amount of the refrigerant by following the below instruction before pump down operation.
1 Prepare an exclusive rechargeable refrigerant vessel, scale and a manifold gauge.
2 Check the amount of refrigerant in the entire system.
3 Connect a refrigerant vessel to a outdoor unit and operated about 50% of the indoor unit in cooling mode.
4 After 10 minutes of cooling operation, check the pressure on high pressure side with the manifold gauge. If the pressure on the high pressure side is over 30kg/cm 2 ,g(426.7psig) reduce the number of operating indoor unit to decrease the pressure below 30kg/cm 2 ,g(426.7psig).
5 When the pressure becomes lower than 30kg/cm 2 ,g(426.7psig) open the manifold gauge valve which is connected to a liquid side. Then, open the valve on the refrigerant vessel for the refrigerant to flow from the liquid side pipe to a vessel.
6 Check the weight difference with the scale. When desire amount of the refrigerant is collected on the vessel, close the valve and remove the manifold gauge.
7 Make sure that the amount of the refrigerant in the vessel is about 50% of the entire system.
8 Measure the amount of refrigerant correctly to not exceed amount of collected refrigerant.
Outdoor unit
Gas side
R410a Refrigerant vessel valve
Valve
Liquid side
Valve
Manifold gauge Service valve
Scale
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Pump Down Procedure (Continued)
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When refrigerant recovery is difficult due to the large amount of refrigerant
1 Prepare manifold gauge, scale and an empty refrigerant vessel.
2 As shown below, connect the middle hose of manifold gauge to the refrigerant vessel and then connect the both ends of manifold gauge to the outdoor unit service valve individually.
( Valve of refrigerant vessel and Low pressure side valve must be closed and the high pressure side valve must be open.)
3 Start refrigerant recovery operation by pressing K2 button three times.
(Refer to page 31.)
4 After operating for 10 minutes, open the valve of refrigerant vessel and fill it with refrigerant.
5 Close the valve of refrigerant vessel when sufficient refrigerant is filled.
6 Close the liquid service valve immediately. When the low pressure falls down lower than 0, close the gas service valve.
7 Stop the operation by pressing reset button.
Manifold gauge
Low pressure side High pressure side
Gas side pipe
Service port
Liquid side pipe
An empty refrigerant vessel scale
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Completing the Installation
Check the following after completing the installation.
Installation
Outdoor unit
Indoor unit
Adding refrigerant
Installing the drain pipe
Installing the wiring
Setting ADDRESS
Check the external surface and the inside of the outdoor unit.
Is there any possibility of short circuit?
Is the place well-ventilated and ensures space for service?
Is the outdoor unit fixed securely?
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?
Are 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?
Check the drain pipe of the outdoor unit and the indoor unit.
Have you completed the drain test?
Is the drain pipe properly insulated?
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?
Are the ADDRESSES of the indoor and outdoor unit properly set?
Final Checks and Trial Operation
Turn on the outdoor unit 3 hours before the test operation to preheat the compressor. If the compressor is not preheated, ‘CH’ will appear on the outdoor unit PCB.
Inspection Before Test Operation
1 Check the power cable and communication cable of the indoor and outdoor unit.
2 Check the power supply between the outdoor unit and the cabinet panel.
Check the 208V-230V~power with the voltage meter.
3 Once the outdoor unit is turned on, it performs the tracking to check the connected indoor unit and options.
Test Operation
1 Run the unit by KEY MODE or controller.
1st- Running all indoor units by KEY MODE
2nd- Each indoor unit run separately by controller
Inspect the compressor sound during the initial operation.
If roaring sound is heard, stop operation.
2 Check the indoor and outdoor units’ running status.
- Check indoor unit cooling and heating air flow
- 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 Finish test.
4 Explain to the customer how to use the air conditioner following the user’s manual.
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Final Checks and Trial Operation(Continued)
Filling Out the Installation Check Card and Storing it Inside of the Outdoor Unit
The installation check card is enclosed in the installation manual.
Installation engineer should fill out the installation card faithfully.
- Basic contents such as installation date, name of engineer, contact number, service company, etc.
- Additional contents such as model name of outdoor unit, remarks, refrigerant calculation due to additional pipe, etc.
- Contents related indoor unit such as the place where indoor unit is installed, model name of indoor unit, etc.
Store the installation check card inside of the outdoor unit and make sure not lose it.
installation check card
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Pump Down Procedure (When removing the product)
1 Turn on the air conditioner and select Cool mode to run the compressor for 3 minutes.
2 Release the valve caps on High and Low pressure side.
3 Use L wrench to close the valve on the high pressure side.
4 Approximately 2 minutes after, close the valve on the low pressure side.
5 Stop operation of the air conditioner.
6 Disconnect the pipes.
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Troubleshooting
The table below give indication about self diagnostic routine. Some of error code requires activities exclusively for Authorized Service Center.
Outdoor Unit
If an error occurs during the operation, it is displayed on the outdoor unit PCB LED, both MAIN PCB and INVERTER PCB.
No.
22
23
24
25
26
27
28
29
30
31
32
33
34
Off
1
2
3
4
5
6
19
20
21
15
16
17
18
11
12
13
14
9
10
7
8
Yellow
LED Display
Green
Blink
On
Red
Main 7-seg display
Error Number
-
-
-
Meaning
Power off/VDD NG
Power ON reset(1sec)
Normal Operation
The number of indoor units error
Indoor and Outdoor Unit communication error
Communication error between outdoor unit Inv and Main micom(1minute)
Outdoor temp sensor error(Short/Open)
Cond temp sensor error(Short/Open)
[Self-diagnosis] Cond sensor detachment
Discharge temp sensor error(Short/Open)
[Self-diagnosis] Discharge sensor detachment
Double pipe sensor error
OLP sensor error
Over-load prevention control
High pressure protection control
Discharge over temperature
ESC EEV Open
Heat Operation Prohibit 30°C (86°F )
Cool Operation Prohibit -10°C (14°F )
Fan_1 error
Fan_2 error
Detection error of misconnected communication cable between indoor and outdoor unit
Comp Starting error
All electric current control
OLP temperature control compressor stop
IPM Over Current(O.C)
Comp limit error
DC-Link voltage under/over error
Comp rotation error
Current sensor error
DC-Link voltage sensor error
OTP error
AC Line Zero Cross Signal out
GAS Leak error(Dual/Single)
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Memo
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FJM RD040MHXCA_IM_00000_E_2.23.10.indd 40 2010-2-24 19:58:01
INSTALLATION
MANUAL
RD040MHXCA Series
RD050MHXCA Series
E S F DB98-32073A(1)
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Air Conditioner
2010-2-24 19:58:01

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