Trane MCX512 G1 User manual

Installation Manual
April 2009 MS-SVN15B-EN
Cooling Only Cooling Only
with Electric
Heater
Heat Pump
MCX512 G1 MCX512G1E MWX512 G1
MCX518 G1 MCX518G1F MWX518 G1
MCX524 G1 MCX524G1B MWX524 G1
MCX530 G1 MCX530G1H MWX530 G1
MCX536 G1 MCX536G1J MWX536 G1
MCX042 G1 MCX042G1J MWX042 G1
MCX048 G1 MCX048G1K MWX048 G1
MCX060 G1 MCX060G1L MWX060 G1
NEW STYLUS
Split System, 1-5 Tons
Convertible Type
MCX/MWX Series 60 Hz

Preface
© 2009 Trane All rights reserved MS-SVN15B-EN
General Information
This Installation Manual is given as a guide to good practice in the installation by the installer of
MCX mini-split system. Installation procedures should be performed in the sequence that they
appear in this manual.
For installing the unit to operate properly and reliably, it must be installed in accordance with
these instructions. Also, the services of a qualified service technician should be employed,
through the maintenance contract with a reputable service company.
Read these Installation Instructions completely before installing the air conditioning system.
About this Manual
Warnings and Cautions appear at appropriate places in this Instruction Manual. Your personal
safety and the proper operation of this machine depend upon the strict observance of these
precautions.
The Trane Company assumes no liability for installations or servicing performed by unqualified
personnel. All phases of the installation of this air conditioning system must conform to all
national, provincial, state and local codes.
WARNING
Grounding Required!
Follow proper local and state electrical code on requirements for grounding. Failure to
follow code could result in death or serious injury.
About the Unit
These MCX/MWX units are assembled, pressure tested, dehydrated, charged and run tested
before shipment. They are charged with nitrogen, and could be used in applications with R-22
and R-410A refrigerant. For further information on refrigerant and piping connections refer to the
outdoor unit manual or contact your Trane local office.
The information contained in this manual applies to MCX/MWX units are designed to operate in
cooling mode only (MCX) and in cooling or heating modes (MWX).
Trane MCX/MWX series of mini-split systems offer three styles of installation: floor, low wall and
under ceiling with both LCD wireless remote control or wired control. Trane MCX/MWX series
provide flexibility and savings.
Note: For model MCX/MWX 042, MCX/MWX 048 and MCX/MWX 060, there are only two styles
of installation: under ceiling and low wall.
NOTICE: Warnings and Cautions appear at appropriate sections throughout this
literature. Read these carefully.
WARNING: Indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided, could
result in minor or moderate injury. It may also be used to alert against unsafe practices.
NOTICE:Indicates a situation that could result in equipment or property-damage only
accidents.

Preface
MS-SVN15B-EN 3
Reception
On arrival, inspect the unit before signing the delivery note. Specify any damage of the unit on
the delivery note, and send a registered letter of protest to the last carrier of the goods within 72
hours of delivery. Notify the dealer at the same time.
The unit should be totally inspected within 7 days of delivery. If any concealed damage is
discovered, send a registered letter of protest to the carrier within 7 days of delivery and notify
the dealer.
Warranty
Warranty is based on the general terms and conditions by country. The warranty is void if the
equipment is modified or repaired without the written approval of The Trane Company, if the
operating limits are exceeded or if the control system or the electrical wiring is modified.
Damage due to inappropriate installation, lack of knowledge or failure to comply with the
manufacturer’s instructions, is not covered by the warranty obligation.
If the installation does not conform to the rules described in Installation Manual, it may entail
cancellation of warranty and liabilities by The Trane Company.
Important
This document is customer property and is to remain with unit. Please place in service
information pack upon completion of work. These instructions do not cover all variations in
systems, nor do they provide for every possible contingency to be met in connection with
installation. Should further information be desired or should particular problems arise which are
not covered sufficiently in this manual, the matter should be referred to your authorized Trane
dealer.

4MS-SVN15B-EN
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Location and Preparation of Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Unit installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Indoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Connection of Refrigerant Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Condensate Drain Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Remote Control Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Typical Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Contents

MS-SVN15B-EN 5
Note: For models MCX/MWX 042, MCX/MWX 048, MCX/MWX 060 there are only two styles of
installation: under ceiling and low wall
Typical Installation
Ceiling
mounted
Outdoor unit
Indoor unit
Floor mounted
Return air grille contains air lter
Refrigerant tubing/wiring
Drain
Returnair grille
contains air lter
Supply air grille
Adjustable louvers direct air
Supply air grille
Adjustable louvers direct air
Low wall mounted

6MS-SVN15B-EN
1. Select an appropriate position that allows every corners of the room to be uniformly air
conditioned and where it is easy to route the refrigerant tubing.
2. Ensure that the floor or ceiling construction is sufficient to fully support the weight of the
indoor unit.
3. Consideration must be given to assure an unobstructed flow of supply and return air.
4. Refrigerant tubes between indoor and outdoor units should be as short as possible.
5. Length of the condensate drain hose should be kept as short as possible (Figure 1).
6. Recommended service clearance as shown in figure 2, 3 and 4.
Location and Preparation of Units
Figure 1.
Figure 2.
Figure 3.
Maintenance area
(Celling mounted)
Min.
30 cm.
Min.
20 cm.
Min.
20 cm.
Min.
30 cm.
Min.
20 cm.
Maintenance area
(Floor mounted)

MS-SVN15B-EN 7
Location and Preparation of Units
7. Do not install unit in direct sunlight or near other heat sources as this may affect
performance. Do not allow outside air to directly enter unit or condensate may form at the
unit’s discharge.
Note: For MCX/MWX 042-060, the unit should be installed over the floor at least 20 cm.
Figure 4.
Min. 120 cm.
Min.
30 cm.
Min.
20 cm.
Min.
20 cm.
Maintenance area
(Low wall mounted)

8MS-SVN15B-EN
Indoor Unit
1. Select a location to route tubing, wiring and drain pipe between the indoor and outdoor units.
2. Make a hole in the wall using a key hole saw or hole-cutting drill attachment.
The hole should be made at a slight downward slant to the outdoor side (Figure 5).
Before cutting, check that no pipes or studs are directly behind the place to be cut. Avoid
areas where electrical wiring or conduits are located.
3. Place the unit on a solid and level foundation.
4. Tubing, wiring through and drain pipe of low wall and floor mounted units can be routed,
rear or right side of unit when facing front. Ceiling mounted can be routed straight
downward.
5. Pull air filters upward (Figure 6).
6. Unscrew at the return grille (Figure 7).
Unit installation
Figure 1.
Figure 2.
Figure 3.
Indoor side
Outdoor side
Pull
Pull

MS-SVN15B-EN 9
Unit installation
7. Unscrew at the grille bottom hinges, pull out the screw, and unscrew at the side panel front
(Figure 8). Then, push down on the side panel front and pull up (Figure 9).
Note: A= 0.49" x 1.575" - 4 SLOT (Mounting hole) (12.5 mm 40.0 mm)
Figure 4.
Figure 5.
Figure 6.
Unit Size B
MCX/MWX 512-518 36.2" (920)
MCX/MWX 524 46.1" (1,170)
MCX/MWX 530-536 55.9" (1,420)
MCX/MWX 042-048 65.7" (1,670)
MCX/MWX 060 75.6" (1,920)
0.83"(21)
0.83"(21)
8.5"(215)
B
A

10 MS-SVN15B-EN
Unit installation
WARNING
Improper Unit Lift!
Test lift unit approximately 24 inches to verify proper center of gravity lift point. To
avoid dropping of unit, reposition lifting point if unit is not level. Failure to properly lift
unit could result in death or serious injury or possible equipment or property-only
damage.
8. Place or hang the unit at the selected position.
9. Replace both right and left side panels, and the return grille after the installation of wiring,
tubing and piping is complete.
Outdoor Unit
See the proper installation method provided in the Installation Manual for the outdoor unit.

MS-SVN15B-EN 11
WARNING
Hazard of Explosion and Deadly Gases!
Never solder, braze or weld on refrigerant lines or any unit components that are above
atmospheric pressure or where refrigerant may be present. Always remove refrigerant
by following the guidelines established by the EPA Federal Clean Air Act or other state
or local codes as appropriate. After refrigerant removal, use dry nitrogen to bring
system back to atmospheric pressure before opening system for repairs. Mixtures of
refrigerants and air under pressure may become combustible in the presence of an
ignition source leading to an explosion. Excessive heat from soldering, brazing or
welding with refrigerant vapors present can form highly toxic gases and extremely
corrosive acids. Failure to follow all proper safe refrigerant handling practices could
result in death or serious injury.
The indoor unit refrigerant line connections are flared. Installation brazing, leak testing, and
evacuation of refrigerant lines are covered in the Installer Manual, packaged with the outdoor
unit. Read the instructions before installing the refrigerant lines.
The indoor unit refrigerant piping connections are located on the right hand side when facing the
unit (Figure 11).
Connecting the unit with flaring procedure. (Only for MCX/MWX 512-536)
1. Flaring (If piping is procured or cut at the site). Cut the copper tube to the required length
with a tube cutter. It is recommended to cut approx. 30-50 cm. longer than the tubing length
you estimate.
2. Hold each pipe downward when cutting and remove burrs at the end of the copper tube with
a tube reamer or file. This process is important and should be done carefully to make a good
flare (Figure 12 and Figure 13).
When reaming, hold the tube end downward and be sure that no copper scraps fall into the
tube.
3. Remove the flare nut from the unit and be sure to mount it on the copper tube.
Connection of Refrigerant Tubing
Figure 1.
Figure 2.
Copper
tubing
Reamer

12 MS-SVN15B-EN
Connection of Refrigerant Tubing
4. Make a flare at the end of copper tube with a flare tool (Figure 14, 15).
Check if (L) is flared uniform and is not cracked or scratched. L Dimension: 1.4 to 1.7 mm (6.35
mm dia) 1.8 to 2.0 mm (9.53 mm dia) 1.9 to 2.2 mm (12.7 mm dia) 2.1 to 2.4 mm (15.88 mm
dia)
A good flare should have the following characteristics:
– Inside surface is glossy and smooth.
– Edge is smooth.
– Tapered sides are of uniform length.
Bending
5. When bending the tube, be careful not to crush it. To prevent crushing of the tube, bend it
gently and do not bend the tube at a radius curvature of less than 100 mm.
6. If the copper tube is bent or pulled too often, it will become stiff. Do not bend the pipe more
than three times at one place.
Cautions before connecting tubes tightly
7. Be sure to apply a sealing cap or water-proof tape to prevent dust or water from getting into
the tubes before they are used.
8. Be sure to apply refrigerant lubricant to the matching surfaces of the flare and union before
connecting them together. This is effective for reducing gas leaks (Figure 16).
Figure 3.
Figure 4.
Figure 5.
Befor e After
Deburring
Flar e tool
Flar e nut
Copper
tubing
L

MS-SVN15B-EN 13
Connection of Refrigerant Tubing
Connection
9. For proper connection, align the union tube and flare tube straight with each other, then
screw in the flare nut lightly at first to obtain a smooth match (Figure 17).
10. Tighten the flare nut to the specified tightening torque with torque wrench and adjustable
wrench (Figure 18).
11. Repeat the process above for the remaining line.
Figure 6.
Figure 7.
Table 1. Flare Nut Tightening Torque
Flare Nut/Piping
Size
Tightening Torque
Kgf, -cm lbf- in
6.35 mm(1/4") dia. 150 200 130 170
9.53 mm(3/8") dia. 350 400 300 340
12.7 mm(1/2") dia. 500 550 430 470
15.88 mm(5/8") dia. 600 650 520 570
Figure 8.
Apply r efrigerant
lubricant her e
Union Flar e nut
Indoor unit
pipe
Wrench
(adjustable)
Torque
wrench
Flar e nut
Connection pipe

14 MS-SVN15B-EN
Connection of Refrigerant Tubing
Connecting the unit with brazing procedure (Only for MCX/MWX 042-060)
1. Cut the copper tube to the required length with a tube cutter. It is recommended to cut
approx. 20-30 cm. longer than the tube length you estimate.
2. Remove burrs at the end of the copper tube with a tube reamer (Figure 12).
3. There are 2 ways to connect the copper tube
– Use a coupling between the copper tube of indoor unit and the copper tube used for
installation (Figure 19).
– Expand the copper tube by using a swaging tool set as in Figure 20.
4. Clean internal and external surfaces of coupling or expanded tube prior to brazing.
NOTICE
System Component Damage!
These air handlers are shipped with dry nitrogen holding charge in the coil. Cut the
process tube or puncture the cap to bleed off the nitrogen prior to any brazing.
Temporarily cap off tubes if the refrigerant line connections are to be made later.
WARNING
Hazard of Explosion and Deadly Gases!
Never solder, braze or weld on refrigerant lines or any unit components that are above
atmospheric pressure or where refrigerant may be present. Always remove refrigerant
by following the guidelines established by the EPA Federal Clean Air Act or other state
or local codes as appropriate. After refrigerant removal, use dry nitrogen to bring
system back to atmospheric pressure before opening system for repairs. Mixtures of
refrigerants and air under pressure may become combustible in the presence of an
ignition source leading to an explosion. Excessive heat from soldering, brazing or
welding with refrigerant vapors present can form highly toxic gases and extremely
corrosive acids. Failure to follow all proper safe refrigerant handling practices could
result in death or serious injury.
Figure 9.
Figure 10.
Copper tube of
outdoor unit
Braze coupling
Copper tube
of indoor unit
Swaging
tool
Copper
tube
Tube holder
(Clamp)

MS-SVN15B-EN 15
Connection of Refrigerant Tubing
5. Insulate the entire gas line.
6. Do not allow uninsulated liquid line to come in direct contact with bare gas line.
7. Precautions should be taken to avoid heat damage to the pressure tap valve core during
brazing. It is recommended that a wet rag be wrapped around the valve body.
8. It is recommended to use braze shield, soak pad in water and place over suction and liquid
lines to protect unit finish.
9. To braze the copper tube, before brazing a copper tube to a solder coupling or a copper tube
to an expanded tube, do not forget to keep them tight as shown in Figure 21, 22.
10. Use a dry nitrogen purge and brazing alloy without flux when brazing the field line to the
copper factory connection. Flow -dry nitrogen into either valve pressure tap port, through the
tubing and out the other port while brazing.
11. Braze using accepted good brazing techniques.
Figure 11.
Figure 12.
Braze
coupling
COMMET3
To rc h
Copper tube
from indoor
unit
Braze rod
Copper tube from
outdoor unit
Braze
coupling
COMMET3
To rc h
Copper tube
from indoor
unit
Braze rod
Copper tube from
outdoor unit

16 MS-SVN15B-EN
– The drain hose should run straight down the wall to a level where the runoff will not stain
the wall.
– There should be no traps. Avoid putting the end of the hose in water.
– To conveniently drain the system, the drain hose must slant downward, with a slope of at
least 1: 50 to prevent leakage. Figure 23 shows the unit in the floor mounted position.
– When the drain hose is placed in the room, insulate the hose with foam polyethylene to
avoid damage to the ceiling or furniture.
– After completing installation of refrigerant lines, wiring and drain connections, bind the
tubing, wiring and drain hose -(check if local codes permit binding) into a bundle by using
tape at 100 or 200 mm (4" to 8") intervals. Make sure the drain hose is at the bottom of the
bundle (Figure 24).
Condensate Drain Piping
Figure 1.
Figure 2.
Figur e 23
Drain hose
Indoor unit
Slant
Figur e 24
Drain hose

MS-SVN15B-EN 17
All wiring and grounding must comply with local electrical codes.
WARNING
Grounding Required!
Follow proper local and state electrical code on requirements for grounding. Failure to
follow code could result in death or serious injury.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow
proper lockout/tagout procedures to ensure the power can not be inadvertently
energized. Failure to disconnect power before servicing could result in death or serious
injury.
Wiring
Important Safeguards:
– Check the unit nameplate for electrical rating. Be sure wiring is done according to local
codes and wiring diagram.
– Use a separate power line with circuit breaker for each air conditioning unit.
– Connect electrical ground to all units.
– Wiring should not touch refrigerant tubing, compressor, motors or moving parts.
– The manufacturer will accept no responsibility for problems caused by unauthorized
changes in the internal wiring.
– Connect the wiring firmly.
Electrical Connections
See Section: Wiring System Diagram
Indoor Unit
Remove the right side panel and return grille (see previous instructions), to access the terminal
base.
– Pass the system wiring through the PVC pipe (both power and control lines) to
interconnect indoor and outdoor units.
– Connect the wire terminals to the terminal base (see connection indication on system
wiring diagram).
– Make sure all connections are tight.
Outdoor unit
Outdoor Unit - Indoor Unit Electrical Interconnection should be in accordance with the applicable
system wiring diagram and indoor unit diagrams.
Outdoor unit diagram are contained in the outdoor unit Installer Manual.
Note: All wiring must comply with national state and local codes.
Note: After completing the connections, re-confirm them to be in accordance with the unit and
system wiring diagrams.
Electrical Installation

18 MS-SVN15B-EN
Locate and attach the wireless remote control and wired control as follows:
1. Do not place the control and the remote control near heat sources or expose to the direct rays
of the sun.
2. Do not expose the control to the indoor unit’s supply air stream.
3. Do not place in a confined space.
4. Attach the remote control holder as shown in Figure 25.
Remote Control Installation
Figure 1.
Dimension
Wired remote control (MCX units only) Mounting Bracket
TEMP MENU MODE FAN
ON
ON OFF
OFF
ECONO
SW
SLEEP ECONO
TURBO
TURBO
AUTO
14.5
4.0 X 2
SLOT
14.5
45.0
90.0
45.0
90.0
61.0
ECONOECONO
ON
FAN
COOL
DRY
HEAT
AUTO
OFF
POWERCOOL
SW
Z
Z
MODE
LOUVER
SWEEP
FRONT
BLADE
LIGHT
OFF
ON
POWER
COOL
ECONO
SLEEP
SEND
Wireless remote control

MS-SVN15B-EN 19
Typical Wiring Diagram
Figure 1. MCX 512-536G1 (60Hz), Indoor Unit, Cooling only with Wireless Controller. (Residential model,
4 speed)
J2
NC1 C2
L
P20
J1 P17
P16
P19
P21
FREEZE
P22
P26
2
1
P3 LINE-C
EX-HI
P7 P6 P5
P4
LOW
MED
HI
NEUTRAL
P2 LINE
P1
BLK BLU
RED
YL
BRW WHT
WHT
GRN/YL
WHT
RED
RED
BLK BLU
RED
YL
INFRARED RECEIVER
GRN/YL
DESCRIPTION
COIL
BLK
RED
1. FREEZE SENSOR
LOCATED ON
EVAPORATOR COIL
2. TEMPERATURE
SENSOR LOCATED
IN RETURN AIR
STREAM
SWEEP MOTOR
(OPTION)
ROOM
STEPPER TOP STEPPER FRONT
DISPLAY
WIRELESS REMOTE
CONTROLLER
POWER SUPPLY
220-240VAC/1PH/60Hz
BLOWER
MOTOR
WIRING TO
GROUNDING SYSTEM
200-240 VAC CONTROL
WIRING TO OUTDOOR UNIT
FIELD WIRING
FACTORY WIRING
JUNCTION
TERMINAL BOARD
CAPACITOR
FUSE 3 AMP.
COLOR CODE
BLU BLUE
BLK BLACK
RED RED
WHT WHITE
GRN GREEN
YL YELLOW
BR BROWN
COULD RESULT INCOULD RESULT IN
USE COPPER MAY CAUSEUSE COPPER MAY CAUSE
DEATH OR SERIOUS INJURY.DEATH OR SERIOUS INJURY.

20 MS-SVN15B-EN
Typical Wiring Diagram
Figure 2. MCX042-060G1 (60Hz), Indoor Unit, Cooling only with Wireless Controller. (Basic model, 3
speed)
2
1
GRN/YL
1. FREEZE SENSOR
LOCATED ON
EVAPORATOR COIL
2. TEMPERATURE
SENSOR LOCATED
IN RETURN AIR
STREAM
P21
FREEZE
P22
P26
ROOM
DISPLAY
P3 LINE-C P6 P5
P4
NEUTRAL
P2 LINE
P1
LOW
MED
HI
WHT
RED
RED
BLK BLU
RED
INFRARED RECEIVER
P17 P16
BLK
RED
J2
J1
WHT
GRN/YL
BLK BLU
RED
BLOWER
MOTOR
BRW WHT
WIRELESS REMOTE
CONTROLLER
POWER SUPPLY
220-240VAC/1PH/60Hz
WIRING TO
GROUNDING SYSTEM
200-240 VAC CONTROL
WIRING TO OUTDOOR UNIT
NC1
C2
L
COLOR CODE
BLU BLUE
BLK BLACK
RED RED
WHT WHITE
GRN GREEN
YL YELLOW
BR BROWN
DESCRIPTION
COIL
FIELD WIRING
FACTORY WIRING
JUNCTION
TERMINAL BOARD
CAPACITOR
FUSE 3 AMP.
COULD RESULT IN
COULD RESULT IN
USE COPPER MAY CAUSE
USE COPPER MAY CAUSE
DEATH OR SERIOUS INJURY.
DEATH OR SERIOUS INJURY.