Trane MWC518 User manual

Indoor Unit
Installation & Operation Manual
Advanced Multi-split System
Cassette Indoor Unit
MWC518/524
R410A
200061360200
April 2012 AMS-SVX02A-EN

2 AMS-SVX02A-EN
Table of Contents
User Notice čččččččččččččččččččččččččččččč 3
Attention ččččččččččččččččččččččččččččččč 4
Unit Model čččččččččččččččččččččččččččččč 6
Unit Components and Names ččččččččččččččččččččč 7
Unit Installation Site Selection and Attentions čččččččččččččč 8
Unit Installation čččččččččččččččččččččččččččč 10
Installation Diagram ččččččččččččččččččččččččččč10
Panel Installationččččččččččččččččččččččččččččč14
Electrical Control Wiring čččččččččččččččččččččččč 19
Electrical Wiring ččččččččččččččččččččččččččččč19
Electrical Parameters ččččččččččččččččččččččččččč21
Electrical Wiring Diagramčččččččččččččččččččččččč 22
DIP Setting čččččččččččččččččččččččččččččč 23
Wired Controller Instruction čččččččččččččččččččččč 24
Fault Analysis ččččččččččččččččččččččččččččč 26
Maintenance ččččččččččččččččččččččččččččč 27

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User Notice
Please review this manual carefully before installation
It is our pleasure that you select air conditioning unit from Trane. Please review this manual
carefully before installation and keep it safe for proper operation.
User notice
During operation, the total capacity of the indoor units operating at the same time shall
•
not exceed the outdoor unit capacity. Otherwise, it will lead to inadequate indoor unit
cooling (heating) capacity.
All indoor units are powered in the same way. User should cut off the main power supply
•
before cleaning.
User should keep the unit powered on. If user do not use the unit for a long term, please
•
cut off power supply and switch on the main power switch for 24 hours before operation.
When the indoor unit receives shutdown signal, the fan would keep running for 20-70s to
•
use residual cool or heat from the heat exchanger and ready for the next operation.
If operating modes of the indoor unit and outdoor unit are not in accordance, the indoor
•
unit fault indicator flashes after 5s and the indoor unit stops. In that case, just mode
conversion can eliminate the conflict. Cooling mode is in accordance with dry or fan mode,
while non modes are in accordance with heating mode.
Communication wires can not mix with power wires, they should be arranged respectively.
•
The minimum distance is 20cm at least, or may cause unreliable communication.

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Attention
Please read the information within this manual and carry out the operation in accordance1.
with instructions.
Please pay close attention to the following symbols:2.
Warning
A symbol indicating improper operation may cause personnel death or severe injury.
Attention
A symbol indicating improper operation may cause personnel injury or property
damage.
Warning
Please contact authorized service centre to install the unit. Improper installation may cause•
accidents, such as water leakage, electric shock and fire etc.
Please select a location can withstand the full weight of machine. Otherwise the machine•
may fall and cause personnel injury or death.
Install the drainage pipe in accordance with this manual to ensure smooth water flow.•
Besides, you should also take measures to prevent condensation. Improper installation will
cause water leakage and wet household things.
Do not use or store inflammable, explosive or dangerous goods beside the air conditioning.•
When fault happens (such as comes out burning smell etc.), please cut off the unit main•
power instantly.
There should be plenty of fresh air inside the room, avoiding oxygen deficit.•
Do not insert fingers or others into air outlet or air inlet grid•
Please check installation stand if damaged after long term use regularly.•
Do not modify the unit. Please contact your dealer or professionals for installation or•
moving.

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Attention
Please verify the power supply meets requirements in the nameplate and check safety•
before installation.
Before operation, please check wires, drainage pipes and pipes connection avoiding•
accidents, such as water and refrigerant leakage, electric shock and fire etc.
Main power supply must be earthed reliably for effective air conditioning unit earth,•
avoiding electric shock. The earth wire should not connect with gas pipe, water pipe,
lightning rod or phone line.
Switch off the unit after 5 minutes running at least, otherwise it may reduce the unit service•
life.
Children operating air conditioning unit is prohibited.•
Do not touch air conditioning unit with wet hands.•
When clean the air conditioning or replace the air strainer, switch off main power supply•
first.
Cut off main power supply of the air conditioning unit, which is unused for a long term.•
Air conditioning unit can not be exposed to water or moist environment directly, which can•
cause corrosion.
Connect the power supply for leakage test after installation.•
Attention

Model M W C 5 1 8 M M N B A
1234567891011
Additional option N A A
12 13 14
Service code M W C 5 1 8 M M N B A N A A
1234567891011121314
Digit 1 M =Trane mini split unit
Digit 2 W = Heat pump
C = Cooling only
Digit 3 C = Cassette unit
Digit 4 5 =Threaded connection
Digit 5, 6 Nominal cooling capacity
18
24
Digit 7 Design serial no.
M = Free split indoor unit inverter system (with electronic expansion valve)
Digit 8 Power supply type
M=220~240V/50Hz/1PH
Digit 9 Electric heater
N= Non-electric heater
Digit 10 Controller
A = Wired controller
B = Wired + card remote controller (standard)
Digit 11 Design change
A = Change of initial design
Digit 12 Optional accessories
N = None
Digit 13 Configuration change
A = First
Digit 14 Others
A = Sale in domestic market
B = Export
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Unit Model
Model (Cassette indoor unit)

Unit Components and Names
Figure 1.
Drainage device (built-in type)
Discharge condensate water from
the indoor unit in cooling mode
Drainage pipe
Air deflector
(In the air outlet)
Connecting pipe
Air outlet
Air strainer and purifier
(In the air inlet grille)
Air inlet grille
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8 AMS-SVX02A-EN
Unit Installation Site Selection and Attentions
Select Unit installation site
Unit installation must comply with the local and national safe codes.
Unit installation quality affects air conditioning operation directly. User can not install the
unit by himself. Please contact your dealer and invite professionals to carry out installation
and commissioning of the unit in accordance with this manual.
Connect the power supply after all installation processes are completed.
Select Indoor unit installation site
Avoid direct sunlight.•
Ensure that the top suspension rod, ceiling and building structure etc. are strong enough to•
support the unit.
Drainage pipe is easy to connect from outside.•
Inlet and outlet air flow are smooth.•
Indoor and outdoor connecting pipe are easy to extend to the outdoor.•
There are not inflammable and explosive articles or gas in the surroundings.•
The damp environment with corrosive gas, heavy dust, salt mist and oil smoke can not be•
the installation site.
Attention
Following locations may cause the air conditioning unit fault. If you have to select this kind of
environment, please contactTrane service centre for help.
ƗFull of engine oil; ƘSeaside saline area; ƙSulphuric gas (sulphuric hot spring);
ƚHigh frequency facility (radio equipment, electric welder and medical equipment);
ƛSpecial environment.
Electrical wiring layout
Installation must comply with national wiring regulations.•
Please select rated voltage and special air conditioning circuit.•
Do not pull the power wires.•
Please invite professionals to install in accordance with local laws and regulations and this•
manual.
Diameter of power cord should be enough. Only specified flexible cord can replace•
damaged power cord and wires.
Please invite professionals to install. Connect wires to special building earthing device•
reliably. There should be adequate leakage protection and air switches for fixed wires.
The air switch with magnetic and thermal trip function is for short circuit and overload
protection.

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Earthing
Air conditioning unit is Class I electric appliance and should be earthed reliably.•
Yellow-green color line is earth line only for earthing and can not be broken. Self-tapping•
screw is not used for fix, or it may cause electric shock.
Earth resistance complies with national standards GB17790.•
User is responsible for providing reliable earthing terminal.•
Pease do not connect earth wire to followings:
ƗWater pipe; ƘGas pipe; ƙDischarge pipe; ƚOthers professionals think unreliable.
Installation accessories
See respective packing list in the packing box.
Unit Installation Site Selection and Attentions

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Unit Installation
Installation Diagram
Over 20mm
Over 1,500mm Air outlet Air outlet Air outlet
Ground
Over 1,500mm
Over 1,800mm
Figure 2.
Verify indoor unit installation site
Ensure no barriers in indoor unit air inlet and outlet for good ventilation.1.
Ensure installation complying with the diagram.2.
Select a low running noise and less vibration location which can support 4 times of indoor3.
unit weight
Ensure horizontal installation location.4.
Select a location, which is easy to discharge condensate water and connect to outdoor unit.5.
Ensure enough space for repair and maintenance.6. The distance between indoor unit and
ground is 1,800mm at least.
Check hoist screw installation site if support 4 times of the unit weight. Strengthening it7.
before installation if necessary (see installation paperboard for points to fix).
Attention
There are pretty much oil smoke and powder in places such as the dining hall and kitchen.
Centrifugal fan, heat exchanger and water pump in places above are easily polluted and affect
heat exchange ability, water dropping and water pump function. In that case, please take
following measures:
Ensure the range hood has good function, avoiding oil smoke entering the air conditioning.1.
Keep air conditioning away from the kitchen.2.