Ingersoll-Rand C-Series Installation and operating instructions

SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and
servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific
knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could
result in death or serious injury. When working on the equipment, observe all precautions in the literature
and on the tags, stickers, and labels that are attached to the equipment.
May 2015
Installation, Operation,
and Maintenance
C-Series
Concealed (Ducted) Indoor Units
Models: 4MUD4518A10N0A 4MUD4536A10N0A
4MUD4524A10N0A 4MUD4542A10N0A
4MUD4530A10N0A 4MUD4548A10N0A
MS-SVX040A-EN
DB68-05526A(1)

2MS-SVX040A-EN
Introduction
Read this manual thoroughly before operating or servicing
this unit.
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as
required. Your personal safety and the proper operation of
this machine depend upon the strict observance of these
precautions.
The three types of advisories are defined as follows:
WARNING Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTIONsIndicates a potentially hazardous
situation which, if not avoided, could
result in minor or moderate injury. It
could also be used to alert against
unsafe practices.
NOTICE Indicates a situation that could result in
equipment or property-damage only.
Important Environmental Concerns
Scientific research has shown that certain man-made
chemicals can affect the earth’s naturally occurring
stratospheric ozone layer when released to the
atmosphere. In particular, several of the identified
chemicals that may affect the ozone layer are refrigerants
that contain Chlorine, Fluorine and Carbon (CFCs) and
those containing Hydrogen, Chlorine, Fluorine and Carbon
(HCFCs). Not all refrigerants containing these compounds
have the same potential impact to the environment. Trane
advocates the responsible handling of all refrigerants-
including industry replacements for CFCs such as HCFCs
and HFCs.
Important Responsible Refrigerant
Practices
Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle
refrigerants must be certified. The Federal Clean Air Act
(Section 608) sets forth the requirements for handling,
reclaiming, recovering and recycling of certain refrigerants
and the equipment that is used in these service procedures.
In addition, some states or municipalities may have
additional requirements that must also be adhered to for
responsible management of refrigerants. Know the
applicable laws and follow them.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes.
WARNING
Personal Protective Equipment (PPE)
Required!
Failure to wear proper PPE for the job being undertaken
could result in death or serious injury. Technicians, in
order to protect themselves from potential electrical,
mechanical, and chemical hazards, MUST follow
precautions in this manual and on the tags, stickers,
and labels, as well as the instructions below:
• Before installing/servicing this unit, technicians
MUST put on all PPE recommended for the work
being undertaken. ALWAYS refer to appropriate
MSDS sheets and OSHA guidelines for proper PPE.
• When working with or around hazardous chemicals,
ALWAYS refer to the appropriate MSDS sheets and
OSHA guidelines for information on allowable
personal exposure levels, proper respiratory
protection, and handling recommendations.
• If there is a risk of arc or flash, technicians MUST put
on all PPE in accordance with NFPA 70E or other
country-specific requirements for arc flash
protection, PRIOR to servicing the unit.
Copyright
This document and the information in it are the property of
Trane and may not be used or reproduced in whole or in
part, without the written permission of Trane. Trane
reserves the right to revise this publication at any time and
to make changes to its content without obligation to notify
any person of such revision or change.
Trademarks
All trademarks referenced in this document are the
trademarks of their respective owners.

Table of Contents
MS-SVX040A-EN 3
Model Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Preparing for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Service Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Unit Insulation for High-Humidity Applications . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Mounting the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Purging the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Installing Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Leak Testing Pipe Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Installing the Drain System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Refrigerant Pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Drainage Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Wiring the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Communications Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Using the Technician Utilities Tool (TUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Using the Wireless Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
The 2-Digit Segments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Installation Option #1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Operating Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Internal Protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Operating Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
External Static Pressure Configuration Settings . . . . . . . . . . . . . . . . . . . . . . . 26
Cleaning the Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Cleaning the Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Periodic Maintenance Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Warranty For Trane C-Series Ductless Systems and Related Accessories . . . 31

4
Model Number Description
4 M U D 4 5 1 8 A 1 0 N 0 A
12345678910 11 12 13 14
Digit 1: Refrigerant
4 = R-410A
Digit 2: Brand name
M = Mini-split indoor unit
Digit 3: System type
U = Universal match heat pump
Digit 4: Configuration Type
D = Concealed ducted unit
Digit 5: Family
4 = Standard model
Digit 6: Connection type
5 = Flare
Digit 7, 8: Nominal capacity (Btu/h x 1,000)
18 = 18,000 Btu/h 36 = 36,000 Btu/h
24 = 24,000 Btu/h 42 = 42,000 Btu/h
30 = 30,000 Btu/h 48 = 48,000 Btu/h
Digit 9: Major development sequence
A = First development sequence
Digit 10: Electric power supply characteristics
1 = 208–230/60/1
Digit 11: Reserved for future use
0 = Not currently used
Digit 12: Region of sale
N = North America (UL or ETL)
Digit 13: Reserved for future use
0 = Not currently used
Digit 14: Minor design sequence
A = First design sequence

5
Preparing for Installation
Accessories
In addition to product literature, the following accessories are supplied with this unit. The type and
quantity may differ, depending on the model.
Location Considerations
Insulation A Insulation B Insulation C
Flexible hose
clampFlexible hose Cable tie
When deciding on a location for the indoor unit, the following factors must be considered:
• The air inlet and outlet must be unobstructed.
• The wall or ceiling must support the weight of the unit.
• The wall or ceiling must not be subject to vibration.
• Pre-plan for easy and short routing of the refrigerant tubing and wiring to the outdoor unit.
• The air must circulate freely in the area to be cooled/heated.
• Sufficient clearance must be maintained around the unit.
• Condensate must be managed correctly and safety away from the unit.
•The unit should be installed in a way that prevents unauthorized access.
• The unit must not be installed in an area that is damp or could come into contact with water
(such as a laundry room).
• The unit must not be exposed to direct sunshine or to other direct heat sources.
• The filter must be able to be removed and cleaned easily.
• The unit should be placed as far as possible from fluorescent lights so the remote control is not
subject to interference.
• Care should be taken to prevent harmonics generated by loose or unsupported material in close
proximity to a running unit.
• The unit must not be installed in an area that is exposed to salt, machine oil, sulfide gas, or
corrosive environmental conditions.

6
Preparing for Installation
Unit Dimensions
8
Suction
side
18.90 (480)
18.90 (480)
15.63 (397) (suspen. pos.)
49.21 (1250)
45.28 (1150)
8.78 (223)
3.43
19.69 (500)
45.28 (1150)
46.69 (1186) (suspension position)
5.9 x 6 = 35.4 (900)
39.37 (1000) air outlet duct flange
(all around)
6
20-3.2 (0.13) hole
(87)
7
1.06 (27)
4.21(107)
4.72 (120)
6.18 (157)
Discharge
side
54
2
1
3
12.60 (320)
9.92 (252)
5.20 (132)
2.99 (76)
5.67 (144)
3.94 x 2 = 7.87 (200)
Unit: inch (mm)
No. Name Description
1Liquid pipe connection 1/4 (6.35)
2Gas pipe connection 18 MBH: 1/2 (12.7); 24 MBH: 5/8 (15.88)
3Drain pipe connection (without optional drain pump) OD 1 (25), ID 0.78 (20)
4Drain pipe connection (with optional drain pump) OD 1 (25), ID 0.78 (20)
5Power supply/communications connection —
6Air discharge grill flange —
7Air filter —
8Mounting hooks M8–M10
4MUD4518A10N0A
4MUD4524A10N0A

7
6
8
5
4
12
3
Suction
side
21.02 (534) suspension pos.
25.59 (650)
25.60 (650)
7.9 x 4 = 31.50 (800)
51.18 (1300)
47.24 (1200)
19.69 (500)
8.78 (223)
Discharge
side
3.39
(86)
3.15 (80)
6.69 (170)
9.61 (244)
11.77 (299)
14.17 (360)
14-0.13 (3.2) hole
1.06 (27)
(all around)
45.79 (1163) air outlet duct flange
47.24 (1200)
48.66 (1236) suspension position
10.94 (278) air outlet duct flange
3.94 (100)
6.22 (158)
5.39 (137)
4.80 (122)
4MUD4530A10N0A
4MUD4536A10N0A
4MUD4542A10N0A
4MUD4548A10N0A
Unit: inch (mm)
No. Name Description
1Liquid pipe connection 3/8 (9.52)
2Gas pipe connection 5/8 (15.88)
3Drain pipe connection (without optional drain pump) OD 1 (25), ID 0.78 (20)
4Drain pipe connection (with option drain pump) OD 1 (25), ID 0.78 (20)
5Power supply/communications connection —
6Air discharge grill flange —
7Air filter —
8Mounting hooks M8–M10
7
Preparing for Installation

8
Preparing for Installation
Service Clearances
CAUTION
Avoid Contact with Fan Motor Blower!
Install the unit at least 7.54 ft (2.2 m) from the floor to avoid the possibility of contact with the
fan motor blower while cleaning the duct. Failure to follow this installation requirement could
result in minor to moderate injury.
Unit width
A = W + 3.94 (100) B = 19.7 (500)
0.78 (20)
0.78 (20)
Unit depth (D)
Ceiling
Unit
Note: If the unit is installed in a ceiling that does not have removable tiles, make allowances for
servicing the unit by creating an access hole. If the unit is installed more than 39.4 in. (1 m)
above the floor, the access hole must be the size of “B.” If the unit is installed less than
39.4 in. (1 m) above the floor, the access hole must be the size of “A” +“B” both.

9
Preparing for Installation
Unit Insulation for High-Humidity Applications
For high-humidity applications, insulate the unit prior to mounting it. Use the following guidelines:
DB
CA
Unit: inch (mm)
Indoor unit model
Insulation
A and B C and D
4MUD4518A10N0A 45.3 (1150) x 12.6 (320) 18.9 (480) x 12.6 (320)
4MUD4524A10N0A
4MUD4530A10N0A
47.2 (1200) x 14.2 (360) 25.6 (650) x 14.2 (360)
4MUD4536A10N0A
4MUD4542A10N0A
4MUD4548A10N0A
Notes: Use an insulation thickness of at least 3/8 in. (10 mm).

10
Installation
Review “Installation Considerations” before proceeding with installation.
Follow the procedures in these sections in the order given.
Note: Remove the two shipping cushions underneath the blower housings before installing the
unit.
Mounting the Unit
If the ceiling is already constructed, piping must be laid into position before placing the unit inside
the ceiling.
CAUTION
Avoid equipment damage and personal injury!
Ensure that the ceiling is strong enough to support the weight of the indoor unit. Before
hanging the unit, test the strength of each of the attached suspension bolts.
To mount the unit:
1. Place the template on the spot where the unit is to be installed and mark the holes.
Note: The template may shrink or stretch slightly due to heat or humidity. Before drilling holes,
verify proper dimensions between the marks.
2. Determine the appropriate type of suspension bolts and anchors according to the ceiling type.
Insert bolt anchors into existing ceiling supports (A) or construct a suitable support (B).
AB
Ceiling support
Concrete
Pre-poured
anchor
Drill hole for
anchor
Field-supplied
suspension bolts (M10
3. Install suspension bolts at all four locations.
4. Screw two nuts to each suspension bolt, leaving space between the nuts for hanging the unit.
Note: If the suspension bolts are longer than 59 in. [1.5 m]) or vibrations are a concern, place
isolators on the brackets to absorb vibrations.
Isolato
rBracket
5. Hang the unit by its support brackets between the two nuts.
6. If pad stoppers or isolators are used to absorb vibrations, place them on the brackets.
7. Tighten the nuts to suspend the unit following the guidelines in the figure below.
Washers, isolators, or spacers
Threaded rod should not protrude
more than 1.2 in (30 mm) below the
top of the bracket
8. Maintain proper spacing between the unit and the ceiling; refer to the following figure.

Ceiling
0.78 (20)
0.78 (20)
Unit
11
Installation
Purging the Unit
The unit is shipped from the factory with a holding charge of nitrogen. All of this gas must be
purged from the unit.
To purge the unit, unscrew the pinch pipes from the ends of both gas and liquid refrigerant pipes.
Make sure all gas has escaped before connecting the piping.
Note: To prevent dirt or foreign objects from getting into the pipes during installation, do not
remove the pinch pipes completely until you are ready to connect the piping.
Liquid refrigerant port
Gas refrigerant port

12
Installation
Installing Refrigerant Piping
Connect field-supplied piping using flared connections (not supplied) or by brazing. The large unit
port is for gas refrigerant; the small one is for liquid refrigerant.
Cut or extend field-supplied piping as needed. Use the following procedures.
NOTICE
System Failure!
If brazing is used for pipe connections, a nitrogen purge is required to prevent the formation of
copper oxides inside the piping. Failure to follow this procedure could damage the system.
• Before connecting the pipes, make sure they are free of dirt and debris.
• Use insulated, unwelded, degreased, and deoxidized copper pipe (Cu-DHP type according to
ISO 1337 or UNI EN 12735-1) suitable for an operating pressure of at least 609.15 psi (4200 kPa)
and a burst pressure of at least 3002.28 psi (20,700 kPa). Copper pipe for hydro-sanitary
applications is unsuitable.
• For sizing and limits (height difference, line length, maximum bends, refrigerant charge, and
so on) see the outdoor unit installation manual.
• All refrigerant connections must be accessible for servicing and maintenance.
Pipe Cutting
Required tools:
•Pipecutter
•Reamer
• Pipe holder
1. Using a pipe cutter, cut the pipe so that the cut edge is at 90° to the side of the pipe.
2. Use a reamer to remove all burrs at the cut edge.
See examples of correctly and incorrectly cut pipes.
Correct: 90º Oblique Rough Burr
Flared Pipe Connections
Clutch type and wing nut type flare tools are available for flared pipe connections.
3. Slide the flare nut over the pipe to be flared.
4. Slide the end of the pipe into the hole on the flaring bar that fits the pipe, leaving a length of
pipe, determined by tool type (see table), extending above the flaring bar. Clamp it down.
Length of pipe extending above flare bar
Pipe
Flaring
bar

R-410A clutch type Conventional flare tool
Clutch type Wing nut type
0–0.020 in. 0.04–0.06 in. 0.06–0.08 in.
13
Installation
5. Attach the yoke to the flaring bar, centering the conical part over the end of the pipe that is
extending above the flaring bar.
6. Tighten the yoke securely to flare the end of the pipe.
Yoke
Flaring bar
Copper pipe
Flare nut
7. Remove the pipe. The end of the pipe that you flared should look like the end of a trumpet. See
examples of correctly and incorrectly flared pipes.
Inclined Damaged
surface Uneven
thickness
Correct Cracked
8. Align the pipes and tighten the flare nuts manually and then with a spanner torque wrench,
applying the torque according to pipe dimensions:
Outer diameter
(in. [mm])
Connection
torque (ft·lb)
Flare
dimension
(in.) Flare shape (in.)
1/4 (6.35) 10.3–13.3 ft·lb 0.34–0.36
R.016–.031
45°±2°
90°±2°
3/8 (9.52) 25.1–31.0 ft·lb 0.50–0.52
1/2 (12.70) 36.1–45.0 ft·lb 0.64–0.65
5/8 (15.88) 50.2–60.5 ft·lb 0.76–0.78

14
Installation
Leak Testing Pipe Connections
WARNING
Confined Space Hazards!
Do not work in confined spaces where refrigerant or other hazardous, toxic or flammable gas
may be leaking. Refrigerant or other gases could displace available oxygen to breathe, causing
possible asphyxiation or other serious health risks. Some gases may be flammable and or
explosive. If a leak in such spaces is detected, evacuate the area immediately and contact the
proper rescue or response authority. Failure to take appropriate precautions or to react properly
to such potential hazards could result in death or serious injury.
WARNING
Explosion Hazard!
Never use an open flame to detect gas leaks. It could result in an explosion. Use a leak test
solution for leak testing. Failure to follow recommended safe leak test procedures could result
in death or serious injury or equipment or property-only-damage.
Use only dry nitrogen with a pressure regulator for pressurizing unit. Do not use acetylene,
oxygen or compressed air or mixtures containing them for pressure testing. Do not use
mixtures of a hydrogen containing refrigerant and air above atmospheric pressure for pressure
testing as they may become flammable and could result in an explosion. Refrigerant, when
used as a trace gas should only be mixed with dry nitrogen for pressurizing units. Failure to
follow these recommendations could result in death or serious injury or equipment or
property-only damage.
Do not exceed unit nameplate design pressures when leak testing system. Failure to follow
these instructions could result in an explosion causing death or serious injury.
Notes:
• All required piping pressure tests must be completed in accordance with national and/or
local codes.
•When leak-testing refrigerant systems, observe all safety precautions.
• Leak test to 590 psig to minimize system exposure to potentially harmful moisture in the
air.
• Use R-410A refrigerant gas as a tracer for leak detection and use oil-pumped dry nitrogen
to develop required test pressures.
1. Close liquid line angle valve.
2. Connect R-410A refrigerant cylinder to high side charging port (at condenser or field supplied
discharge line access port). Add refrigerant to reach pressure of 12 to 15 psig.
3. Disconnect refrigerant cylinder. Connect dry nitrogen cylinder to high side charging port and
increase pressure to 150 psig. Do not exceed high side (discharge) unit nameplate design
pressure. Do not subject low side (suction) components to high side pressure.
4. Check all piping joints, valves, etc. for leaks. Recommend using electronic detector capable of
measuring 0.1 oz/year leak rate.
5. If a leak is located, use proper procedures to remove the refrigerant/nitrogen mixture, break
connections and make repairs. Retest for leaks.
6. Make sure all service valves are open.

15
Installation
Installing the Drain System
7. Push the supplied drain hose as far as possible over the drain hose port. Do not apply excessive
force to the piping on the unit side when connecting the drain hose.
Drain hose port
Drain hose port
Drain hose
Drain connection
8. Wrap the insulation (supplied) around the drain hose and clamp the connection as tightly as
possible until you can see at least 8 holes.
Insulation
Clamp
9. Install the drain pipe into the drain hose. Secure it with PVC adhesive and clamps as necessary
to ensure a tight fit with no leakage.
Drain hose
PVC pipe

16
Installation
10. Refer to the following figure for installing the drain pipe.
Hanger
Unit: in. (mm)
Ceiling
Air vent
Flexible
39.4–59
(1000–1500)
7.87 (200)
0.79 (20)
11.8 
(300)
Note: Install a U-trap at the end of the drain
pipe to prevent odors.
Drain pipe installation
If the installation requires more than three indoor units, install the main air vent at the front of the
indoor unit that is farthest from the main drain. It may be necessary to install individual air vents
to prevent water flowing back to each indoor unit.
Hanger
Main drain pipe
Individual
air vent
Main air vent
Centralized horizontal drainpipe (more
than 1/100 slope)
13in.(330mm)22in.
(550 mm) maximum
39–59 in. (1–1.5 m)
Ceiling
Centralized drain pipe installation

17
Insulation
Insulation
After determining that there are no leaks in the refrigerant pipes or drainage hose, insulate them
as described in these sections.
Refrigerant Pipes
1. Use the table below to select the insulation type for each pipe size.
Pipe
Pipe size
(in. [mm])
Insulation Type
Standard conditions
(86°F [30°C], 85%)
High humidity conditions(a)
(86°F [30°C], over 85%)
EPDM or NBR
Liquid pipe 1/4 (6.35) – 3/8 (9.52) 3/8 (9) 3/8 (9)
1/2 (12.70) – 2 (50.80) 1/2 (13) 1/2 (13)
Gas pipe(b)
(b) Internal temperature of gas pipe is higher than 248°F (120°C).
1/4 (6.35) 1/2 (13) 3/4 (19)
3/8 (9.52) – 1 (25.40) 3/4 (19) 1.0 (25)
1-1/8 (28.58) – 1-3/4 (44.45) 1-1/4 (32)
2 (50.80) 1.0 (25) 1-1/2 (38)
2. Wrap insulation around the entire surface of each pipe, from the indoor unit to the outdoor unit,
overlapping insulation to avoid gaps. Clamp insulation tightly to pipe.
•Do not wrap the gas and liquid refrigerant pipes together.
•Avoid compressing the insulation as much as possible.
•Be sure there are no cracks or deformities in the insulation at bends in pipes.
•If necessary double the insulation to prevent condensation from forming in warm or humid
areas.
•Cut off excess insulation.
Drainage Hose
Insulate (field supplied) the entire surface of the drain pipe that is inside the building, including the
connection between the drain hose and drain stub. Clamp tightly.
(a)When installing insulation in any of the following environments, use insulation required for high humidity conditions: Buildings with close proximity to
bodies of water or hot springs or on the side of a hill in which the building is partly covered by earth; ceilings frequently exposed to moisture such as
in restaurants, saunas, swimming pools, and corridors of dormitories or studios near a frequently-used outdoor exit; buildings with no ventilation system.

18
Wiring the Unit
Observe the following precautions when making electrical connections.
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.
NOTICE
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of conductors. Failure to use copper
conductors could result in equipment damage.
• Make all electrical connections in accordance with electrical codes and ordinances.
• Select the power cable in accordance with relevant local and national regulations.
• Wire size must comply with local and national code.
•Use grade H07RN-F or H05RN-F power cable.
• Connect the power cable into the power cable terminal and fasten it with a clamp.
• Unbalanced power must be maintained within 10% of supply rating among whole indoor units.
• Significantly unbalanced power may shorten the life of the system. If the unbalanced power is
greater than 10% of supply rating, the unit will stop and an error code will be generated.
• Connect the power cable to the auxiliary circuit breaker. An all-pole disconnection from the
power supply must be incorporated in the field wiring (1/8 in. [3 mm]).
• All wiring must be protected from weather and damage.
• Maintain a distance of 2 in. (50 mm) or more between power and communications cables to
prevent interference.
• Maintain a voltage drop of less than 10% between the power source and the unit(s).
• Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small
head will strip the head and make proper tightening impossible.
• Over-tightening the terminal screws may break them. 
Tightening torque for M4 screws: 0.86–1.06 lbf·ft (12.0–14.7 kgf·cm).
• After making a knockout hole, apply rust-preventive paint to the bare metal around the hole.
• Secure the cable conduit to the outdoor knockout using the proper connector and bushing.
Power Wiring
Connect the power cable from the outdoor unit to the indoor unit at terminals L1 and L2. Refer to
Figure 1 and Figure 2, p. 19.
Communications Wiring
Use 18 AWG, 25 pF/ft nom., 60.7 impedance, braid or foil shielded, twisted pair for
communications wiring.
Connect the communications cable from the outdoor unit to the indoor unit at terminals F1 and F2.
Refer to Figure 1 and Figure 2, p. 19.

19
Figure 1. Wiring diagram
Indoor unit
Power cable
Outdoor unit
Communication cable
Grounding
Disconnect
Circuit
breaker
Figure 2. Wiring terminals
1(L) 2(N) 1 2 V1 V2 F3 F4
F2F1
1(L) 2(N) N
L
L1 L2 L1 L2
L1 L2
Indoor unit
Main power cable
Cable clamp
Outdoor unit
I
ndoor power
Communica
tion cable
Cable ties

20
Configuration
All indoor units are factory configured. If modifications are required, the Technician Utilities Tool
(TUT) is strongly recommended. However, any of the following devices can be used:
• Technician Utilities Tool (TUT) (instructions follow)
•Wired Remote Control (refer to VRF-SVN59* for instructions)
• Wireless Remote Control (If you use this device, a ducted signal receiver (TVCTRLTRKA10N0)
is required.)
Note: Configuration changes are not required for typical installations.
Using the Technician Utilities Tool (TUT)
To change configurations using the Technician Utilities Tool (TUT), follow this procedure:
1. At the Indoor Unit Option Writer screen on the TUT, select the desired option codes by referring
to Tabl e 1, p. 23.
2. Use the following table and notes to determine which digits can be modified.
Digit 1 2 3 4 5 6 7 8 9 10 11 12
Installation Option #1 [0] 200 1 0 [1] 00 0 0 0
Digit 13 14 15 16 17 18 19 20 21 22 23 24
Installation Option #1 [2] 0 0 00 0 [3] 0 0 0 0 0
Notes:
1. Digits 1, 7, 13 and 19 (in brackets) are factory set and cannot be changed.
2. For Installation Option #1, digit 2 will always be “2”. See Table 1, p. 23 for the option code settings.
3. Digits shown in black boxes should always be set to “0”.
3. To save your settings, select the Write Option button. See the figure below for an example of
the Indoor Unit Option Writer screen on the TUT.