Trane MCC Series User manual

MCC-SVN01A-EN
Models
Cooling Only
MCC 518 AB
MCC 524 AB
MCC 530 AB
MCC 536 AB
February 2000
Installation Manual
Split System, 1-5 Tons
18,000 - 38,000 Btu
Underceiling Type
MCC Series 50 Hz
CASSETTE

2MCC-SVN01A-EN© American Standard Inc. 2000
General Information
General Information
This Installation Manual is given as a
guide to good practice in the
installation by the installer of MCC
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 this Installation Manual
completely before installing the
air conditioning system.
About this Manual
Cautions appear at appropriate
places in this Installation Manual.
Your personal safety and the proper
operation of this machine require that
you follow them carefully.
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.
About the Unit
These MCC units are assembled,
pressure tested, dehydrated, charged
and run tested before shipment. The
information contained in this manual
applies to MCC units are designed to
operate in cooling mode only.
Trane MCC series offer ceiling
mounted installation to leave the floor
space uncluttered, and equipped with
LCD wireless remote control.
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.
Warning
Warnings are provided at appropriate
places in this manual to indicate to
installers, operators and service
personnel of potentially hazardous
situations which, if not avoided,
COULD result in death or serious
injury.
Caution
Cautions are provided at appropriate
places in this manual to indicate to
installers, operators, and service
personnel of potentially hazardous
situations which, if not avoided, MAY
result in minor or moderate injury or
malfunction of the unit.
Your personal safety and the proper
operation of this unit require that you
follow them carefully. The Trane
Company assumes no liability for
installations or servicing performed by
unqualified personnel.
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.

MCC-SVN01A-EN 3
Contents
General Information 2
Indoor Unit Installation 4
Outdoor Unit Installation 5
Connection of Refrigerant Tubing
and Condensate Drain Piping 6
Leak Check and System Evacuation 7
Electrical Installation 8
Wiring Diagram 9
Dimensional Data 10
Notes 11

4MCC-SVN01A-EN
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
more than
100 cm.
more than
100 cm.
Lock Nut
Washers
Suspension
Bracket
Cross Section
of Air Outlet
Indoor Unit Installation
Where to install Indoor Unit
• There should not be any heat
source or steam near the unit.
• There should not be any obstacles
to prevent the air circulation.
• A place where air circulation in the
room will be good.
• A place where drainage can be
easily obtained.
• A place where noise prevention is
taken into consideration.
• Do not install the unit near the
door way.
Indoor Unit Installation
• Select the location where a space
is more than 100 cm. as shown in
figure 1 also ensure that the
position dose not interfere with
light fitting, sprinkle head, etc.
• Determine the ceiling hole by using
the paper pattern.
- Determine the mounting position
on ceiling by using position A B
C and D in the paper pattern.
• Hang the four mounting rods to the
positions marked as picture shown
in figure 3 (using twelve nuts and
eight washers to support the
suspension brackets). Suspend
the unit to the mounting rods.
Lock the nuts, ensure for good
drainage, and check whether the
unit is on horizontal level by using
leveling guage.
• Install the leveling metal plate to
adjust the gap between the unit
and a ceiling, fixing the screws
following No. 1 2 3 and 4 in
paper pattern.
• Remove four screws (M8). Fix the
front panel with the units by tighten
up four screws (M8).
Caution: Over tightening the screws
will distort the front panel.

MCC-SVN01A-EN 5
Figure 6
Figure 7
more than 10 cm.
more than 10 cm. more than 10 cm.
more than 70 cm.
more than 35 cm.
more than 30 cm.
more than 10 cm. more than 30 cm.
more than 120 cm.
more than 35 cm.
MODE
LOUVER
HOUR
SLEEP
TEMP
SWEEP
SEND
START
MIN
STOP
FAN
COOL
DRY START
STOP
HIGH
MED
LOW
AUTO
Wireless Remote Control
Figure 8
Outdoor Unit Installation
Where to install Outdoor
Unit
• The foundation must be solid
enough to bear the weight and
vibration of the unit.
• The space around the unit is
adequate for ventilation.
• The location is not close to any
flamable gases.
• The location is sufficiently isolated
so that the running noise and the
hot exhaust air do not disturb the
users or their neighbors.
• Easy access to check and to
maintain.
• Ensure the spaces indicated by
arrows from the wall, ceiling, fence,
or other obstacles.
Caution
Installation in the following places may
cause problems. If it is unavoidable to
use such places, consult with your
distributor or dealer.
• A place with machine oil.
• A saline place such as a place very
close to a seashore.
• A place with sulphur gas.
• A place where high-frequency
waves are generated by radio
equipment, welder and medical
equipment.
Remote Control
Installation
Locate and attach the wireless
remote control as follows:
• Do not place the remote control
near heat sources or expose to
the direct rays of the sun.
• Do not expose the remote control
to the indoor unit’s supply air
stream.
• Do not place in a confined space.
• Attach the remote control holder
as shown in figure 8.

6MCC-SVN01A-EN
Figure 15
Figure 10
Figure 9
Figure 11
Figure 12
Figure 13
Copper
tubing
Reamer
Before After
Flare nut
Flare tool
Copper
tubing
Apply refrigerant
lubricant here
Flare nut
Union
Give a slope
Figure 14
,,
,,
,,
yy
yy
yy
,,,
,,,
,,,
yyy
yyy
yyy
Drain hose
Connection of Refrigerant Tubing
and Condensate Drain Piping
Deburring
Connecting the unit with flaring
procedure
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 9 and Figure 10).
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 12).
10. Tighten the flare nut to the
specified tightening torque with
torque wrench and adjustable
wrench.
Condensate Drain Piping
- 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 as shown
in figure 14.
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.
4. Make a flare at the end of copper
tube with a flare tool (Figure 11).
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 13).
- 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 15).

MCC-SVN01A-EN 7
Leak Check and System Evacuation
Leak Check
After the connection operation of
refrigerant lines to both the outdoor
and indoor unit is completed, the field
brazed connections must be checked
for leaks. Pressurize the system
through the service valve with dry
nitrogen to 250 psi. Use soap
bubbles or other leak-checking
methods to ensure that all field joints
are leak free. If not, release pressure,
repair and repeat leak test.
System Evacuation
1. After completion of leak check,
evacuate the system.
2. Attach appropriate hoses from
manifold gauge to gas and liquid
line pressure taps.
Note: Unnecessary switching of
hoses can be avoided and
complete evacuation of all lines
leading to sealed system can be
accomplished with manifold
center hose and connecting
branch hose to a cylinder of
R-22 and vacuum pump.
3. Attach center hose of manifold
gauges to vacuum pump.
4. Evacuate the system to hold a
350 micron vacuum.
5. Close off valve to vacuum pump
and observe the micron gauge.
If gauge pressure rised above
500 microns in one (1) minute,
then evacuation is incomplete or
the system has a leak.
6. If vacuum gauge does not rise
above 500 microns in one (1)
minute, the evacuation should
be complete.
7. With vacuum pump and micron
gauge blanked off, open valve on
R-22 cylinder and allow refrigerant
pressure to build up to about 40
psig.
8. Close valve on the R-22 supply
cylinder. Close valves on manifold
gauge set and remove refrigerant
charging hoses from liquid and
gas gauge ports.
9. Leak test the entire system. Using
proper procedures and caution,
repair any leaks found and repeat
the leak test.
Refrigerant Charging Procedure
Charge refrigerant through the gauge
port on the liquid line until pressure at
gauge is up to 120-150 psi. Once the
charge enters the system, backseat
(open) the liquid line service valve and
disconnect the charging line and
replace the cap on the gauge port.
Gaseous Charging
This procedure is accomplished
with the unit operating. Electrical
connections must be complete.
Do not proceed until the system is
ready to operate.
Procedure
1. Connect R-22 drum with gauge
manifold to the Schrader valves
(pressure taps) on the compressor
discharge and suction lines.
2. Turn on power to the unit. Allow
the system to run for five to ten
minutes to stabilize operating
conditions.
3. Once proper airflow is established,
observe the suction and head
pressure gauges on the gauge
manifold. Pressure reading should
fall approximately at the normal
points. Add or remove refrigerant
(gas only) as required to obtain
correct head and suction pressures.
Check suction line superheat and
condenser sub-cooling to ensure
the unit is operating properly.
4. Disconnect all power to the unit.
5. Remove the charging system from
the unit and close the opening in
the bottom of the control box with
the pivotal cover before attempting
to replace access panel.
Liquid pressure Suction pressure
Vacuum pump
R-22
Service hose
Liquid line
Suction
line
Electrical connection
Figure 16

8MCC-SVN01A-EN
Electrical Installation
All wiring and grounding must comply
with local electrical codes.
1. Wiring
Important Safeguards:
- Check the unit nameplate for
electrical rating. Be sure wiring
is done according to local
codes and wiring diagram.
- 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.
- Use copper conduction only.
2. Electrical Connections
- See Section: Wiring System
Diagram.
- Bare the ends of electric wire.
- After retaining the wire, check
that all the terminal screws are
firmly tightened.
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, referred to unit
installation section,
(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.
Note:
- All wiring must comply with
national state and local codes.
- After completing the connections,
re-confirm them to be in
accordance with the unit and
system wiring diagrams.

MCC-SVN01A-EN 9
220-240/1/50 Hz
MCC518-536AB
Wiring Diagram

10 MCC-SVN01A-EN
Model MCC518AB MCC524AB MCC530AB MCC536AB
A. Height above ceiling 290 mm. 290 mm. 340 mm. 340 mm.
B. Height above suspension brackets 180 mm. 180 mm. 230 mm. 230 mm.
C. Height of condensate drain above ceiling 230 mm. 230 mm. 280 mm. 280 mm.
D. Pipe exit position 165 mm. 165 mm. 215 mm. 215 mm.
950
390
340
512
330
370350
THE CEILING HOLE 860~890
418 785
drainpipe outlet 830 60
main cable entry
B
CD
22
refrigerant pipe
Dimensional Data
A

MCC-SVN01A-EN 11
Notes

Since The Trane Company has a policy of continuous product and product data improvement,
it reserves the right to change design and specifications without notice.
Trane Thailand
7th Floor, Ploenchit Center Building
2 Sukhumvit Road, Klongtoey
Bangkok 10110
http://www.trane.com
An American Standard Company
Literature Order Number MCC-SVN01A-EN 0200
New
Stocking Location Bangkok, Thailand