Outdoor Unit

Outdoor Unit
Installation
C-Series
Outdoor Units
Models:
4TUK4518A10N0A
4TUK4524A10N0A
4TUK4530A10N0A
4TUK4536A10N0A
4TUK4542A10N0A
4TUK4548A10N0A
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
MS-SVN045A-EN
DB68-05153A(1)
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:
Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
Indicates a potentially hazardous
CAUTIONs situation which, if not avoided, could
result in minor or moderate injury. It
could also be used to alert against
unsafe practices.
Indicates a situation that could result in
NOTICE
equipment or property-damage only.
WARNING
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 refrigerantsincluding 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.
2
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.
MS-SVN045A-EN
Table of Contents
Model Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Preparing for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Dimensions and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Minimum Operating Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Moving the Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Wall Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Ground or Roof Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Wind Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Air Guide Duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Selecting Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Pipe Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Pipe Thickness and Temper Grade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Refrigerant Piping Maximum Length and Height Differences . . . . . . . . . 18
Storing Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Installing Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pipe Cutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nitrogen Flushing While Brazing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flared Pipe Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Piping to the Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
19
20
20
22
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Installing a Grounding Rod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Installing the Grounding Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Communications Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
System Leak Testing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
System Evacuation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Insulating Refrigerant Pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Calculating the Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Charging the Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Connecting the Drain Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
MS-SVN045A-EN
3
Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Configuring the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Units A and B (24, 30, 36, 42, 48 MBH Capacity Models) . . . . . . . . . . . . . 38
Unit C (18 MBH Capacity Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Monitoring System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Changing an Outdoor Unit Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Pre-Start Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Test Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Service: Pump Down Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Relocating the Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
For Trane C-Series Ductless Systems and Related Accessories . . . . . . . . . . 47
4
MS-SVN045A-EN
Model Number Description
4
T
U
K
4
5
1
8
A
1
0
N
0
A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Digit 1: Refrigerant
4 = R-410A
Digit 15: Service digit (not used
for ordering)
Digit 2: Brand Name
A = First sequence
B = Second sequence
T = Mini-split outdoor unit
Digit 3: System type
U = Universal match heat pump
Digit 4: Configuration type
K = Heat pump
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
24 = 24,000 Btu/h
30 = 30,000 Btu/h
36 = 36,000 Btu/h
42 = 42,000 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: Reserve 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
MS-SVN045A-EN
5
Preparing for Installation
Dimensions and Weights
Table 1.
Dimensions and weights for 24 and 30 MBH capacity units (Type A)
Outdoor
unit
capacity
(MBH)
Model number
24
4TUK4524A10N0A
30
4TUK4530A10N0A
Dimensions (WxHxD)
in. (mm)
37.01 (940) x 39.29 (1096) x 12.99 (426)
Weight
lb (kg)
142.20
(64.50)
154.22
(69.50)
Shipping
weight
lb (kg)
Shipping dimensions (WxHxD)
in. (mm)
39.17 (995) x 43.15 (1096) x 16.77 (426)
153.22
(69.50)
163.14
(74.00)
Figure 1. Dimensional drawing for 24 and 30 MBH capacity units (Type A)
15.1 (384)
13.0 (330)
14.2 (361)
24.4 (620)
Table 2.
26.6 (676)
20.8 (528)
21.1 (536)
38.3 (973)
39.29 (1096)
37.01 (940)
Dimensions and weights for 36, 42, and 48 MBH capacity units (Type B)
Outdoor
unit
capacity
(MBH)
Model number
36
4TUK4536A10N0A
42
4TUK4542A10N0A
48
4TUK4548A10N0A
Dimensions (WxHxD)
in. (mm)
Weight
lb (kg)
Shipping dimensions (WxHxD)
in. (mm)
37.01 (940) x 47.64 (1210) x 12.99 (330)
194.01
(88.00)
39.17 (995) x 54.65 (1388) x 16.77 (426)
Shipping
weight
lb (kg)
216.05
(98.00)
Figure 2. Dimensional drawing for 36, 42, and 48 MBH capacity units (Type B)
15.1 (384)
14.2 (361)
12.99 (330)
24.4 (620)
6
34.8 (884)
22.0 (559)
22.3 (566)
47.64 (1210)
46.7 (1185)
37.01 (940)
MS-SVN045A-EN
Preparing for Installation
Table 3.
Outdoor
unit
capacity
(MBH)
18
Dimensions and weights for 18 MBH capacity units (Type C)
Model number
Dimensions (WxHxD)
in. (mm)
Weight
lb (kg)
Shipping dimensions (WxHxD)
in. (mm)
Shipping
weight
lb (kg)
4TUK4518A10N0A 34.65 (880) x 25.12 (638) x 12.20 (310) 99.2 (45.0) 40.28 (1023) x 29.53 (750) x 16.26 (413) 105.8 (48.0)
Figure 3. Dimensional drawing for 18 MBH capacity units (Type C)
0.47 (12)
25.98 (660)
0.90 (23)
14.33 (364)
12.20 (310)
25.12 (638)
34.65 (880)
2.60 (66)
Minimum Operating Clearances
Install units as shown in the illustrations below (Figure 4, p. 7, Figure , p. 8, and Figure 6, p. 9),
observing ventilation and service requirements. Space requirements are based on cooling mode
operation and an outdoor temperature of 95°F (35°C). More space is required if the outdoor
temperature is higher than 95°F (35°C) or if the area is easily heated by solar radiation.
Note: The front of the unit is curved and has the name brand logo on it.
Figure 4. Air flow direction
Back
Front
Back
Front
Top view
MS-SVN045A-EN
Side view
7
Preparing for Installation
Figure 5. Minimum operating clearances for a single unit installation
Notes:
• Clearances listed in this manual are minimum for system operation. All installations shall
comply with codes and standards adopted by the Authority Having Jurisdiction (AHJ).
• If a wind baffle is installed, measure the clearance from the front of the unit rather than
from the front of the wind baffle, as shown in the following illustrations.
When air outlet is toward a wall
80 (2000)
24 (600)
When top of unit is blocked and the air outlet
is opposite the wall
60 (1500)
12 (300)
When from and back of unit are blocked by walls
12 (300)
6 (150)
20 (500)
60 (1500)
Top of unit is blocked and the air
outlet is toward a wall
12 (300)
When three sides are blocked by a wall
60 (1500)
12 (300)
When the air outlet is opposite a wall
8
MS-SVN045A-EN
Preparing for Installation
Figure 6. Minimum operating clearances for a multiple-unit installation
Notes:
• Clearances listed in this manual are minimum for system operation. All installations shall
comply with codes and standards adopted by the Authority Having Jurisdiction (AHJ).
12 (300)
• If a wind baffle is installed, measure the clearance from the front of the unit rather than
from the front of the wind baffle, as shown in the following illustrations.
24 (600)
24 (600)
24 (600)
24 (600)
24 (600)
60 (1500)
MS-SVN045A-EN
24 (600)
120 (3000)
60 (1500)
12 (300)
12 (300)
120 (3000)
12 (300)
9
Preparing for Installation
Location Considerations
Choose an installation location based on the following considerations:
•
Install the outdoor unit:
– On a supporting structure that can bear the weight of the outdoor unit.
– With sufficient clearances around the unit for service and repairs.
– On a flat surface that does not collect rain water.
– Upright (not on its side or upside down).
– In a well ventilated location.
– Away from strong wind.
– So that passageways and thoroughfares are not blocked.
– Where there is no risk of flammable gas leakage.
– Where there is no exposure to salt, machine oil, sulfide gas, or corrosive environmental
conditions.
– Away from sea breeze.
Note: For seacoast applications, block the unit from direct exposure to sea breeze by installing
the unit behind a structure (such as a building) or a protective wall that is 1.5 times higher
than the unit, leaving 28 in. (700 mm) of space between the wall and unit for air
circulation. Consult an installation expert about taking anti-corrosion measures, such as
removing salinity on the outdoor coil and applying a rust inhibitor more frequently than
once a year.
ODU
Sea breeze
ODU
Sea
Protection walls
ODU
Sea breeze
Sea breeze
ODU
ODU
Sea
Sea
– At least 9.84 ft (3 m) away from equipment that generates electromagnetic waves.
– Maintaining sufficient clearances from equipment such as radios, computers, stereo
equipment.
10
MS-SVN045A-EN
Control
Indoor unit
Stereo
Unit: inch (mm)
Outdoor unit
40 (101
6) or mo
re
40 (1016) or more
Fuse
or more
60 (1524)
Fuse
ore
r m re
o
)
24
mo
(15
) or
60 1524
(
60
re
or mo
524)
60 (1
12 (305)
Air guide duct
(not provided by Trane)
8 (203)
– Far enough away from people living and working nearby so that hot discharge air or noise
do not disturb them. For installations other than roof or ground, the minimum
recommended height is 6.6 ft (2 m) to prevent passersby from being exposed to hot
discharge air.
– Away from flammable materials.
MS-SVN045A-EN
•
Ensure that condensate water generated by the outdoor unit can drain smoothly away from the
unit.
•
Install the power and communication cables in a separately installed enclosure.
•
If installing on a high place such as a roof, a fence or guard rail should be installed around it
to safeguard it from falling.
•
If there is a potential for accumulated snow to block the air inlet or heat exchanger, install the
unit on a higher base.
•
R-410A refrigerant is a safe, nontoxic and nonflammable refrigerant. However, if there is a
concern about a dangerous level of refrigerant concentration in the case of refrigerant leakage,
add extra ventilation.
•
Avoid installing the outdoor unit where corrosive gases, such as sulfur oxides, ammonia, and
sulfurous gas, are produced. If unavoidable, consult with an installation specialist about using
a corrosion-proof or anti-rust additive to protect the unit coils.
11
Preparing for Installation
Moving the Outdoor Unit
Follow these guidelines when moving the outdoor unit:
• Before moving the unit, determine a path that can support its weight.
• Do not lay the unit on its side and do not slant the unit more than 30 degrees.
• Take care to avoid injury while moving the unit; the surface of the heat exchanger is sharp.
– If moving the unit with a crane, fasten the wire rope as shown in Figure 7. To protect damage
or scratches to the unit, use a spreader bar.
– If the unit is being moved a short distance by hand, two people should lift and carry it
together using the transportation handles on the side of the unit, as shown in Figure 7.
Figure 7.
Moving the outdoor unit
Moving with a crane
Moving by hand
Wire rope/straps
Spreader bar
Wood pallet
Transportation handles
12
MS-SVN045A-EN
Unit Installation
Follow these guidelines for installing an outdoor unit.
Important:
The manufacturer is not responsible for damage incurred for installations that have
not followed these guidelines.
Wall Mounting
Important:
•
If the unit weighs over 132.2 lb, suspending it from a wall is not recommended.
If installing the unit on a wall, ensure that the wall is able to support the weight of the outdoor
unit and rack.
•
For better weight distribution, install the rack as close to a supporting column as possible.
•
To reduce vibration and to minimize noise, install isolation grommets (not provided):
– Between the supporting rack and the wall.
– Beneath the feet of the unit.
– Between the unit and the rack.
Rack
Wall
Isolation
grommets
Soft rubber grommet
(not provided)
Ground or Roof Installation
MS-SVN045A-EN
•
If installing the unit on the ground or on a roof, secure it to a rigid and stable base using M10
anchor bolts.
•
Use zinc-plated or stainless steel nuts and bolts.
•
Use a rubber washer between the bolt and the unit to prevent bimetallic corrosion.
•
Consult with the authority having jurisdiction regarding adopted building codes and standards
that detail securing the unit to withstand wind and seismic interruptions.
•
The anchor bolt must be 0.79 in. (20 mm) or higher from surface of the base.
•
Make a drain pit around the base to ensure proper drainage.
13
14.2 (361)
13.0 (330)
15.1 (384)
Units: in. (mm)
Anchor bolt hole
24.4 (620)
14.3 (363)
13.4 (340)
Types A and B
Units: in. (mm)
Anchor bolt hole
12.2 (310)
37.0 (940)
26.0 (660)
34.6 (879)
Type C
0.79 in. (20 mm)
Outdoor unit
Anchor bolt
Outdoor unit
support
Base
surface
If you cannot attach the unit to the base or if the unit needs additional support, secure it with wires
as follows:
1. Loosen the four screws at the top of the unit and wrap wire around each of them.
2. Tighten the screws.
3. Stake the wires to the ground.
Figure 8. Securing the unit with wire
14
MS-SVN045A-EN
Unit Installation
Wind Baffle
If the outdoor unit will be operated when the ambient temperature is less than 23°F (-5°C) DB or
if the outdoor unit might be exposed to direct strong winds, a wind baffle should be installed.
Drill holes in the locations shown in Figure 9 and attach the wind baffle to the unit with screws.
Figure 9. Wind baffle installation
Type C
Type B
Type A
Locations for drilling
and attaching screws
Locations for drilling
and attaching screws
Locations for drilling
and attaching screws
Top view
Top view
Top view
7-7/8 in. (17.8 cm)
or more
7-7/8 in. (17.8 cm)
or more
Type A and B
7-7/8 in. (17.8 cm)
or more
Type C
22-5/8 in. (62.5 cm)
Width of screw strip: 1/2 in. (1.27 cm)
24-5/8 in. (62.5 cm)
Width of screw strip: 5/8 in. (1.6 cm)
MS-SVN045A-EN
15
Unit Installation
Air Guide Duct
An air guide duct (not available through Trane) can be installed on the guard fan. Make sure that
the installation screws for the air guide duct do not damage the copper piping.
Maintain clearances between the air guide duct and the unit as shown.
Outdoor unit
12 in. (305 mm)
Air guide duct
(not provided by Trane)
8 in. (203 mm)
16
MS-SVN045A-EN
Refrigerant Piping
This section contains information on selecting, storing, and connecting refrigerant piping.
Selecting Refrigerant Piping
Refrigerant piping diameter, thickness, and temper is selected according to length, as specified in
this section.
Notes:
• Use ACR piping, as specified in ASTM B280-13, Standard Specification for Seamless
Copper Tube for Air Conditioning and Refrigeration Field Service.
• If there is a risk of decreased performance caused by pipe length, use piping that is one
size larger than that specified in this section.
All systems must be selected through the manufacturer’s provided selection software and
reviewed by the local sales office to ensure that all required components are accounted for and that
system performance meets the specific job requirements.
Use the following procedure:
1. Obtain the selection report from the designer.
2. Mark the piping “tree” diagram with job site changes:
• Line length changes
• Vertical changes between components
• Indoor unit location changes
• Outdoor unit location changes
3. Submit changes to the designer and obtain the final report to ensure that the refrigeration lines
are correctly sized and the system weigh-in charge is accurate.
Pipe Diameter
Table 4.
Outdoor unit pipe diameter based on unit capacity
Outdoor unit
capacity (MBH)
18
24
Liquid pipe
in. (mm)
1/4 in (6.35 mm)
Gas pipe
in. (mm)
1/2 in. (12.7 mm)
30
36
42
3/8 in. (9.52 mm)
5/8 in. (15.88 mm)
48
MS-SVN045A-EN
17
Refrigerant Piping
Pipe Thickness and Temper Grade
CAUTION
Risk of Pipes Breaking!
If pipes with a diameter larger than 3/4 in. (19.05 mm) are specified, use semi-hard (C1220T1/2H) or hard (C1220T-H) copper piping. If a softer copper pipe (C1220T-O) is used, the pipe may
break due to its low pressure resistance and cause personal injury.
Table 5.
Refrigerant pipe minimum thickness and temper grade based on pipe diameter
Outer diameter
in. (mm)
Minimum thickness
in. (mm)
1/4 (6.35)
0.028 (0.70)
3/8 (9.52)
0.028 (0.70)
1/2 (12.70)
0.031 (0.80)
5/8 (15.88)
0.039 (1.00)
3/4 (19.05)
0.035 (0.9)
7/8 (22.22)
0.035 (0.9)
Temper grade
Annealed
(C1220T-O)
Drawn
(C1220T-1/2H or C1220T-H)
Refrigerant Piping Maximum Length and Height Differences
Table 6 gives the maximum total refrigerant piping length and the allowable height differences
between the outdoor and indoor unit.
Table 6.
Maximum refrigerant piping length and height difference between indoor and outdoor
units
Unit model
(MBH)
Maximum total piping length
ft (m)
Maximum piping height difference
between indoor and outdoor units
ft (m)
18
98 (30)
65 (20)
24
164 (50.0)
30
36
98 (30)
42
246 (75)
48
Storing Refrigerant Piping
To prevent foreign materials or water from entering the pipe, storing method and sealing method
(especially during installation) is very important. Apply correct sealing method depending on the
environment (see Table 7).
Table 7.
Refrigerant pipe storage factors
Storage location
Outdoor
Indoor
18
Storage time
Sealing type
Longer than one month
Pipe pinch
Shorter than one month
Taping
—
Taping
MS-SVN045A-EN
Refrigerant Piping
Installing Refrigerant Piping
WARNING
Hazard of Explosion and Deadly Gases!
Failure to follow all proper safe refrigerant handling practices could result in death or serious
injury. 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.
NOTICE:
System Component Damage!
Do not remove the seal caps from refrigerant connections, or open the service valves until
prepared to braze refrigerant lines to the connections. Excessive exposure to atmosphere (> 5
min.) may allow moisture or dirt to contaminate the system, damaging valve seals and causing
ice formation in system components.
Overview
1. Cut or extend field-supplied piping as needed. To extend pipes, braze or using flared pipe
connections (not supplied). Refer to “Pipe Cutting” p. 19, “Nitrogen Flushing While Brazing”
p. 20, and “Flared Pipe Connections” p. 20.)
2. Make sure that pipes are free of dirt, debris, and moisture, and do not leak. (Refer to “System
Leak Testing Procedure” p. 29).
3. Braze or use flared pipe connections to install piping. Refer to “Connecting Piping to the
Outdoor Unit” p. 22).
Pipe Cutting
Required tools:
• Pipe cutter
• 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.
Examples of correctly and incorrectly cut pipes.
Correct: 90º
MS-SVN045A-EN
Oblique
Rough
Burr
19
Refrigerant Piping
Nitrogen Flushing While Brazing
NOTICE
Avoid Unit Damage!
Never braze pipe connections without performing nitrogen flushing. Failure to perform this
procedure will damage the unit, resulting in capacity loss and reduced long-term reliability.
While brazing refrigerant pipes, flush them with nitrogen gas. Use a pressure regulator to maintain
a flow rate of 1.76 ft3/h (0.05 m3/h) or more.
Figure 10. Nitrogen flushing while brazing refrigerant pipes
Nitrogen
Service
valve
Pressure regulator
Nitrogen
Flow meter
Flared Pipe Connections
Clutch type and wing nut type flare tools are available for flared pipe connections.
1. Slide the flare nut over the pipe to be flared.
2. 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
Flaring
bar
Pipe
R-410A clutch type
0–0.020 in.
20
Conventional flare tool
Clutch type
Wing nut type
0.04–0.06 in.
0.06–0.08 in.
MS-SVN045A-EN
Refrigerant Piping
3. Attach the yoke to the flaring bar, centering the conical part over the end of the pipe that is
extending above the flaring bar.
4. Tighten the yoke securely to flare the end of the pipe.
Yoke
Flaring bar
Copper pipe
Flare nut
5. 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.
Correct
Inclined
Damaged
surface
Cracked
Uneven
thickness
6. Align the pipes and tighten the flare nuts manually and then with a spanner torque wrench,
applying the torque according to pipe dimensions:
MS-SVN045A-EN
Flare dimension
(in.)
1/4 (6.35)
10.3–13.3 ft·lb
0.34–0.36
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
Flare shape (in.)
45°±2°
Connection
torque (ft·lb)
90°±2°
Outer diameter
in. (mm)
R.016–.031
21
Connecting Piping to the Outdoor Unit
Pipes can be connected to the outdoor unit at the front, back, bottom, left, or right of the unit.
Note: Make at least one loop to reduce noise and vibration.
1. Remove the pipe cover from the unit. See Figure 11.
Figure 11. Pipe connections on unit
Note: The unit may appear different than the one
shown, depending on the model.
Service valve: 
high pressure (liquid side)
Service valve: low pressure
(gas side)
Radiant heat vents
Liquid pipe
Gas pipe
2. Remove the knock-out that you are going to use. Unused knock-outs should remain closed to
prevent damage to the unit.
• Take care to prevent damage to the exterior of the unit.
• Remove burrs from knock-out hole edges and apply rust inhibitor.
3. Connect the pipes to the unit using flared connections or by brazing. If brazing the pipe
connection, avoid damaging the service valves by wrapping them with a wet cloth.
• Avoid damaging the temperature sensor.
• Ensure that the connected pipes do not touch each other or make contact with the unit.
• Ensure that all pipe connections are accessible for servicing and maintenance.
22
MS-SVN045A-EN
Electrical Wiring
• Make at least one loop in refrigerant piping to reduce noise and vibration.
Make at least one loop
4. After making electrical connections (see “Electrical Wiring” p. 23) and insulating the pipes (see
“Insulating Refrigerant Pipes” p. 32), replace the pipe cover and close the remaining gap. Make
sure the radiant heat vents (Figure 11, p. 22) are not blocked.
Electrical Wiring
Observe the following precautions when making electrical connections. Refer to Figure 12 for a
typical system installation diagram.
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.
•
All wiring must be protected from weather and damage.
•
Do not disconnect or change the factory wiring inside the unit.
Figure 12. Typical system installation wiring
Outdoor unit
Circuit
breaker
Communication cable
Disconnect
Indoor unit
Grounding
MS-SVN045A-EN
Power cable
23
Electrical Wiring
Power Wiring
•
Multi-pole circuit breaker or disconnect is required to fully isolate the unit from all power.
•
Install circuit breakers/disconnects in accordance with local and national codes.
•
Select the power cable in accordance with relevant local and national regulations.
•
Power cable specifications are based on an underground/ambient temperature of 86ºF (30ºC)
and single multi-conductor cables. If conditions are different from these, consult an electrical
installation expert and re-select the power cable. If the length of power cable exceeds 164.04 ft
(50 m), re-select the power cable considering the voltage drop.
•
Do not use power cable that has exposed wire.
•
Unbalanced power must be maintained within 2% of supply rating among all indoor units or
the unit will stop and an error code will be generated. (Significantly unbalanced power may
shorten the life of the system.)
•
Use a power cable made out of incombustible material for the insulator (inner cover) and the
sheath (outer cover).
Provide strain relief for power cables.
•
WARNING
Avoid Risk of Fire or Explosion!
Do not let the power cable come into contact with the pipes inside the outdoor unit. If the
power supply cable touches the pipes, the vibration of the compressor will be transferred to
the pipes and can damage the power supply cables or pipes. The damage could result in fire or
explosion, causing death or serious injury.
Follow this procedure:
1. Refer to Table 8 for power cable and circuit breaker specifications, and Table 9 for conduit
specifications.
Table 8.
Circuit breaker and power cable specifications
Power
Model
V
FLA
Fan1
Fan2
MCA
MOP
4TUK4518A10N0A
0.13
4TUK4524A10N0A
0.48
—
7.8
15
—
11.7
4TUK4530A10N0A
20
0.48
—
19.4
30
0.48
0.48
22.2
35
4TUK4542A10N0A
0.48
0.48
22.2
35
4TUK4548A10N0A
0.48
0.48
22.2
35
4TUK4536A10N0A
Hz
60
RLA
208/230
N/A
Notes:
• Voltage tolerance is ± 2%.
• Abbreviations: RLA: Rated load ampere; FLA: Full load ampere; MCA: Minimum circuit amperes ; MOP: Maximum
overcurrent protective device (amperes).
Table 9.
Cable conduit specifications
Name
24
Temper grade
Application conditions
Flexible PVC conduit
PVC
If conduit is installed indoors and not exposed to outside
elements (embedded in concrete)
Class 1 flexible conduit
Galvanized steel sheet
If conduit is installed indoors but exposed to outside
elements
Class 1 PVC-coated flexible
conduit
Galvanized steel sheet and
soft PVC compound
If conduit is installed outdoors and requires waterproofing
MS-SVN045A-EN
Electrical Wiring
2. Cut the power cable to an appropriate length and connect it to terminals L1 and L2 in the power
supply box with a solderless ring terminal (see Figure 13).
Unit capacity
Screw
Tightening torque for
terminal
Terminals
18 MBH
M4
0.9–1.3 lbf/ft (1.2–1.8 N.m)
AC power: L1, L2 and Communication: F1, F2
M3
0.4–0.5 lbf/ft (0.5–0.7 N.m)
Communication: F1, F2
M5
N.m)
24, 30, 36, 42, 48 MBH
1.5–2.2 lbf/ft (2.0–3.0
AC power: L1, L2
3. If two cables are connected to one terminal, place the cables back to back with the thin cable
upward and the thick cable downward, as shown in the detail in Figure 13.
4. Secure the cable(s) with a cable tie and provide strain relief.
5. Replace the cover on the terminal board.
Note: Make sure that the section of the power supply cable that has the sheath removed is
inside the power supply box. If this is not possible, connect the power cable conduit to
the power supply box.
6. Pull the power cable through one of the designated knock-outs at the bottom right of the
outdoor unit (refer to Figure 14, p. 26).
Figure 13. Power wiring terminals
L1
L1
Indoor unit
L2
L2
F4
F3
V2
V1
F2
F1
L1 L2 L1 L2
1(L) 2(N)
L
Detail for connecting
two cables to one terminal
N
Solderless
ring terminal
Cable ties
Indoor power
Main power cable
Communication cable
Cable clamp
Cable tie
Thick cable
Thin cable
Outdoor unit
MS-SVN045A-EN
25
Electrical Wiring
Figure 14. Power cable knock-outs
Notes:
• Remove burrs from the knock-out hole.
• Use cable conduit and bushing to prevent cables from being
damaged when passing through the knock-out holes.
• Apply rust-resistant paint around the knock-out hole.
Grounding
Important:
Grounding must be done by a qualified electrician. The unit cannot be ground by a
gas or water pipe, a lightning rod, or a telephone line grounding wire.
Ground the unit at an exclusive grounding terminal, at the electrical panel (see Figure 15), or—if
the power distribution circuit is not grounded or its grounding does not comply with electrical
codes and specifications—to a grounding rod.
Figure 15. Outdoor unit grounding examples
Grounded to exclusive
grounding terminal that
is part of the structure
Grounding at the
electrical panel
Grounded to grounding rod
Installing a Grounding Rod
If the installation requires a grounding rod is required, follow this procedure:
1. Select a grounding rod that complies with national and local codes.
2. Select a location for the grounding rod that:
• Contains hard damp soil rather than loose sand or gravel.
• Is located away from underground structures such as gas and water pipes, telephone lines,
and underground cables.
• Is at least 6.6 ft (2 m) away from a lightning conductor.
3. Install the grounding rod in accordance with national and local codes.
4. Proceed with “Installing the Grounding Cable.”
Installing the Grounding Cable
1. Select rated grounding cable by referring to the outdoor unit power cable specifications
(Table 8, p. 24).
2. Connect the grounding cable to the grounding hole inside the power supply box and pull it
through the designated grounding knock-out.
26
MS-SVN045A-EN
Electrical Wiring
Note: If the grounding cable length needs to be extended, make the cable connection in
accordance with national and local codes.
3. If a grounding rod was installed to ground the unit, measure the resistance with a ground
resistance tester. Refer to Table 10 for resistance requirements.
• If the resistance is above the requirements, drive the grounding rod deeper into the ground
or increase the number of grounding rods until the resistance requirement is achieved.
• If you have grounded the unit to a grounding terminal or electrical panel, ensure that the
resistance meets the requirements.
Table 10. Grounding resistance requirements
Power condition at
installation site
High or average humidity
• Ensure that the grounding resistance is <100 .
Voltage to ground is ≤ 150 V
• If a circuit breaker is installed that disconnects the
circuit within 0.5 seconds, the allowable grounding
resistance is 30–500 .
Voltage to ground is > 150 V
MS-SVN045A-EN
Low humidity
• Ideally, grounding resistance should be <100 and
should not exceed 250 .
• Ensure that the grounding resistance is <100 .
• If a circuit breaker is installed that disconnects the
circuit within 0.5 seconds, the allowable grounding
resistance is 30–500 .
27
Communications Wiring
Use 18 AWG, 25 pF/ft nom., 60.7  impedance, braid or foil shielded, twisted pair wire for
communications wiring.
Refer to Table 9, p. 24 for cable conduit specifications.
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.
1. Connect the communications cable wires to terminals F1 and F2, as shown in Figure 16.
Notes:
• Ensure that more than 1 in. (20 mm) of the outer sheath of the power and communication
cable conduit are inside the electrical component box.
• To reduce interference, ensure that power and communication cables run in parallel with
a minimum space of 2 in. (50 mm) between the cables or, if crossing is necessary, cross
at 90 degrees.
• The communication cable between outdoor units and between indoor and outdoor units
has no polarity.
Figure 16. Wiring terminals for communication between indoor and outdoor units
L1
L1
Indoor unit
L2
L2
F4
F3
V2
V1
F2
F1
F1,F2 terminals on indoor unit
L1 L2 L1 L2
F1,F2 terminals on outdoor unit
1(L) 2(N)
L
N
Cable ties
Indoor power
Main power cable
Communication cable
Cable clamp
Outdoor unit
2. Provide strain relief for the communications cable.
3. Pull the communications cable through the designated knock-out at the bottom right of the
outdoor unit (refer to Figure 14, p. 26).
28
MS-SVN045A-EN
System Leak Testing Procedure
Before leak testing pipe connections, read all safety precautions and notes.
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 performing a leak test. 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 only one circuit at a time 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.
• Use tools rated for R-410A.
• Do not remove the valve core of the charging port.
• Perform the leak test with the outdoor unit service valves closed.
MS-SVN045A-EN
29
Use the following procedure for leak testing pipe connections.
NOTICE
Refrigerant Pipe Damage!
When performing a leak test, use a pressure regulator to prevent an excess amount of nitrogen
(over 594.6 psi [4.1 MPa]) from entering the pipes. If the pipe is filled with more than the
specified amount of nitrogen in a short period of time, pipe damage may occur.
1. Connect the refrigerant manifold gauge hoses to the liquid side and gas side service ports on
the unit, and connect the center hose to a nitrogen gas tank fitted with a pressure regulator (see
Figure 17).
Figure 17. Leak testing pipe connections with a manifold gauge
High-pressure side
Low-pressure side
Service ports
Nitrogen gas
High-pressure (liquid
side) service valve
Low-pressure (gas
side) service valve
2. Fill the lines with nitrogen to no more than 594.6 psi (4.1 MPa).
3. Monitor the pressure periodically for a minimum of 24 hours. If the pressure drops, use soapy
water to check for leaks. Bubbles will occur if joints are not tight.
4. Release pressure in pipelines gradually.
5. Repair leaks.
6. Repeat the previous steps until the pressure remains constant.
7.
Maintain 145 psi (1.0 MPa) of pressure for 15 minutes and check for further leakage. If the
pressure drops, check for leaks and repair them. Repeat this step as necessary until 145 psi
(1.0 MPa) of pressure is maintained for 15 minutes.
8. Remove hoses from service ports.
30
MS-SVN045A-EN
System Evacuation Procedure
After performing a leak test, use a vacuum pump to triple evacuate the system as described in the
following flow chart:
Notes:
• Use a vacuum pump with a check valve to prevent pump oil from flowing backward while
the vacuum pump is closed.
• Completely close the liquid-gas side service valve of the outdoor unit.
Using vacuum-rated hoses, connect the manifold gauges to the
liquid and suction (and high-pressure, if applicable, gas pipes.
Evacuate the system to 750 microns.
Hold for 5 minutes.
Over 750 microns?
Yes
Check for leaks and repair as
necessary.
Yes
Check for leaks and repair as
necessary.
Yes
Check for leaks and repair as
necessary.
No
Break the vacuum by applying
10 psi (0.07 MPa) of nitrogen.
Evacuate the system to 500 microns.
Hold for 5 minutes.
Over 500 microns?
No
Break the vacuum by applying
10 psi (0.07 MPa) of nitrogen.
Evacuate the system to 200 microns.
Wait for 15 minutes. A rise of no more
than 200 microns is acceptable.
Over 400 microns?
No
Continue holding the vacuum for
a total of 2.5 hours.
Over 400 microns?
(Or, if left overnight,
over 750 microns?)
Yes
Check for leaks and repair as
necessary.
No
The system is ready for refrigerant
charging.
MS-SVN045A-EN
31
Insulating Refrigerant Pipes
After determining that there are no leaks in the refrigerant pipes, insulate them as described:
1. Use Table 11 to select the insulation thickness according to pipe size and humidity conditions.
Table 11. Pipe insulation selector
Insulation Type
High humidity conditions(a)
86°F (30°C), 85%
Standard conditions
86°F (30°C), < 85%
Pipe size
in. (mm)
Pipe
Liquid pipe
EPDM or NBR
(in. (mm)
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)
1/4 (6.35)
1/2 (13)
3/4 (19)
3/4 (19)
1.0 (25)
3/8 (9.52)
Gas pipe(b)
1/2 (12.70)
5/8 (15.88)
3/4 (19.05)
(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.
(b) Internal temperature of gas pipe is higher than 248°F (120°C).
2. Wrap insulation around the entire surface of each pipe, including the refrigerant pipes from the
indoor unit to the service valves inside the outdoor unit, the branch joints, distribution header,
and connection points on each pipe.
• Do not wrap the gas and liquid refrigerant pipes together.
• If gas and liquid pipes are in contact with one another, use thicker insulation and make sure
the pipes are not pressing tightly against one another.
Insulation
Insulation
Liquid pipe
Gas pipe
• Overlap insulation to avoid gaps.
• Avoid compressing the insulation as much as possible.
• Be sure there are no cracks or deformities in the insulation at bends in pipes or where
hangers are attached to pipes.
• If necessary, double the insulation to prevent condensation from forming in warm or humid
areas.
32
MS-SVN045A-EN
3. Clamp insulation tightly to pipes.
Insulation
Clamp
Gas side pipe
Liquid side pipe
4. Cut off excess insulation.
MS-SVN045A-EN
33
Refrigerant
After successful leak testing and vacuum drying, calculate the amount of refrigerant needed and
then charge the system, as specified in this section.
Calculating the Refrigerant
The unit is shipped from the factory with the refrigerant holding charge given in Table 12.
Refer to Table 13 for the additional refrigerant charge quantity.
Table 12. Refrigerant holding charge for each outdoor unit model
Model
4TUK4518A10N0A 4TUK4524A10N0A 4TUK4530A10N0A 4TUK4536A10N0A 4TUK4542A10N0A 4TUK4548A10N0A
Refrigerant
holding
charge:
lb (kg)
2.87 (1.3)
4.63 (2.1)
5.73 (2.6)
6.17 (2.8)
6.17 (2.8)
6.17 (2.8)
Note: The holding charge amount takes into account the indoor unit and 25 ft (7.5 m) of pipe.
Table 13. Total additional refrigerant charge for each outdoor unit model
Model
4TUK4518A10N0A 4TUK4524A10N0A 4TUK4530A10N0A 4TUK4536A10N0A 4TUK4542A10N0A 4TUK4548A10N0A
Additional
refrigerant
charge:
oz/ft (g/ft)
34
0.11 (3.1)
0.24 (6.8)
0.35 (9.9)
MS-SVN045A-EN
Charging the Refrigerant
After calculating the correct amount of refrigerant needed by the system (see “Calculating the
Refrigerant” p. 34), charge the system as described in the following procedure:
WARNING
Hazard of Explosion and Deadly Gases!
Do not heat the refrigerant container to speed up the charging process. An explosion could
result, resulting in death or serious injury.
NOTICE
Risk of Unit Malfunction!
Do not leave the front panel open while charging refrigerant. If the front panel is open, the
amount charged into the unit will be incorrect.
NOTICE
Unit Component Damage!
Open the gas side and liquid side service valves completely after charging the refrigerant. If
you operate the unit with the service valves closed, the unit may be damaged.
1. Attach the liquid manifold hose to the liquid side service port and open the manifold gauge
valve.
2. Add the liquid refrigerant, making sure the refrigerant bottle is held in an upright position. Use
a scale to determine that the correct amount has been added.
3. Close the refrigerant container immediately after adding the refrigerant.
Figure 18. Charging additional refrigerant
Manifold gauge
4. Open the outdoor unit service valves to release the charge from the outdoor unit.
5. After charging the refrigerant, replace the caps.
MS-SVN045A-EN
35
Connecting the Drain Hose
Condensed water must be safely drained away from the unit through a drain hose.
To install the drain hose:
Note: A minimum space of 1.96 in. (50 mm) must be allowed between the bottom of the outdoor
unit and the supporting base to facilitate drain hose installation.
Bottom of outdoor unit
Drain
plug
0.51 in. (13 mm)
Drain hose
3.15 in. (80 mm)
1. Insert the drain connector into the drain hole on the underside of the outdoor unit.
2. Connect the drain hose to the drain connector.
3. Plug the unused drain holes with drain plugs.
Drain plug (5)
Drain hole (2)
Types A and B
36
Drain plug (4)
Drain hole (1)
Type C
MS-SVN045A-EN
Control System
The functions of the 7-segment display, DIP switches, and K buttons are explained in this section.
Refer to Figure 19 for how they are identified on the control board.
WARNING
Hazardous Voltage!
Before making contact with the inverter circuit board, wait for at least 15 minutes after
powering down the outdoor unit to allow the unit to fully discharge high DC voltage. Failure to
allow the high DC voltage to discharge completely could result in death or serious injury.
Figure 19. Location of 7-segment display, DIP switches, and K buttons on control board
Type A and B models: 
24, 30, 36, 42, and 48 MBH
SW507
Type C models: 18 MBH
SW508
K5 K6 K7 K8 K9 K10 K11 K12
K1
K2
K3
K4
K1
7-segment display, two DIP switches, four K buttons
MS-SVN045A-EN
K2
K3
K4
7-segment display, one DIP switch, four K buttons
37
Control System
Configuring the System
Units A and B (24, 30, 36, 42, 48 MBH Capacity Models)
Type A and B units have a control board with two DIP switches (Figure 19 shows their locations).
DIP switch configurations are explained in Table 15 and Table 14.
ON
ON
1 2 3 4
1 2 3 4
K5 K6 K7 K8
K9K10 K11 K12
SW507
SW508
Table 14. Units A and B: DIP switch SW508 (K9–K12)
SW508
On (default)
Off
K9
Auto Silence Mode(a)
Manual Silence Mode(b)
K10
K11
Not used.
K12
(a) Auto Silence Mode requires a locally purchased time relay, which enables remote control of this function.
(b) Manual Silence Mode requires further configuration using DIP switch SW507 (see Table 15).
Table 15. Units A and B: DIP switch SW507 (K5–K8)
SW507
Setting
Function description
Snow prevention control
K6
On
Disables snow prevention control (default)
Off
Enables snow prevention control(a)
Silence mode control (for manual function; see Table 14)
K7
On
K8
On
K7
On
K8
Off
K7
Off
K8
On
K7
Off
K8
Off
Disable silence mode option
Silence mode 1st step
Silence mode 2nd step
Silence mode 3rd step
(a) When snow prevention control is enabled, eco mode (standby mode) is not functional.
38
MS-SVN045A-EN
Control System
Unit C (18 MBH Capacity Models)
Type C units have a control board with one DIP switch (Figure 19 shows its location). DIP switch
configurations are explained in Table 16.
ON
1 2 3 4
K1 K2 K3 K4
SW02
Table 16. Unit C: DIP switch SW02 (K1–K4)
DIP switch
Setting
Function description
Snow prevention control
K1
On
Disables snow prevention control (default)
Off
Enables snow prevention control(a)
Silence mode control
K3
On
K4
On
K3
On
K4
Off
K3
Off
K4
On
K3
Off
K4
Off
Disable silence mode option
Silence mode 1st step
Silence mode 2nd step
Silence mode 3rd step
(a) When snow prevention control is enabled, eco mode (standby mode) is not functional.
MS-SVN045A-EN
39
Control System
Monitoring System Settings
Button K4 is pushed once to view system settings, as described in Table 17
Table 17. Button K4: System settings
Number of
times
button K4
is pressed
40
7-segment display
Setting
Digit 1
Digit 2
Digit 3
Digit 4
Unit
1
Order
frequency
1
Hundreds’ digit
Tens’ digit
Ones’ digit
Hz
2
Current
frequency
2
Hundreds’ digit
Tens’ digit
Ones’ digit
Hz
3
Number of
connected
indoor units
3
0
0
1
Each
4
Sensor for
outdoor intake
4
±
Tens’ digit
Ones’ digit
°C
5
Discharge
sensor
5
Hundreds’ digit
Tens’ digit
Ones’ digit
°C
6
Eva-Mid sensor
6
±
Tens’ digit
Ones’ digit
°C
7
Condensate
sensor
7
±
Tens’ digit
Ones’ digit
°C
8
Current
8
Tens’ digit
Ones’ digit
Tenths’ digit
(decimal)
A
9
Fan speed
9
Thousands’
digit
Hundreds’ digit
Tens’ digit
rpm
10
Target
discharge
sensor
A
Hundreds’ digit
Tens’ digit
Ones’ digit
°C
11
MAIN EEV
B
Hundreds’ digit
Tens’ digit
Ones’ digit
step
12
Capacity sum of
indoor units
Tens’ digit
Ones’ digit
Tenths’ digit
(decimal)
kW
Frequency
status
0: Normal
1: Hold
2: Down
3: Up limit
4: Down limit
—
C
13
Protective
control
D
0: Cooling
1: Heating
Protective
control
0: No
protective
control
1: Freezing
2. Non-stop
defrosting
3: Overload
4: Discharge
5: Total electric
current
14
Temperature of
heat radiating
plate
E
Hundreds’ digit
Tens’ digit
Ones’ digit
—
15
Software
version
F
—
—
—
—
MS-SVN045A-EN
Control System
Button K4 is pushed in sequence to view software versions and unit addresses, as described in
Table 18.
Table 18. Button K4: Software versions and unit addresses
7-segment display
Button K4 is pressed
in sequence
(number of times)
Software version/
Unit address
1, and held 3 seconds
Main circuit board version
Digit 1:
Year (Hex)
Digit 2: Month
(Hex)
Digit 3:
Digit 4:
Date (Tens’ digit) Date (Ones’ digit)
1
Inverter board version
1
EEPROM version
Digit 1
Digit 2
Digit 3
Digit 4
1
Automatically assigned
unit addresses
A
0
0
1
1
Manually assigned unit
addresses
A
0
0
1
Changing an Outdoor Unit Address
If multiple outdoor units are connected to a central control—VRF SC, VRF SC+BACnet®, or a VRF
Touchscreen—it may be necessary to manually address the outdoor units. Addresses available for
outdoor units range from 00 to 15. Refer to Table 19.
Table 19. Address change for multiple outdoor units on VRF Central Control or Touchscreen Control
Button K2 action
Operation
Display view
Displays outdoor unit address.
If auto addressed, 00 AU will appear.
Press K2 and hold for
2 seconds
If manually addressed, the display will show 00 00
through 00 15.
The example in the next column shows that the
address was manually set to 03.
Cycles through OD unit addresses:
Press and release K2
00 00, 00 01, 00 02, . . . 00 15, then back to
repeatedly
00 AU.
Press K2 and hold
until display flashes
and relays click.
Saves the address that appears on the display.
The example in the next column shows that the
address was manually set to 02.
Notes:
• To exit without saving, press and release K1.
• After saving the address setting, wait at least 3 minutes before starting the system
• After the manually set address is saved, the display will begin scrolling through the indoor unit addresses.
MS-SVN045A-EN
41
Pre-Start Checks
After installation and before the test operation is conducted, perform the following pre-start checks:
NOTICE
Avoid Damage to the Communication Circuit!
Do not measure the communication terminal with an insulation tester. Doing so will damage
the communication circuit.
•
Ensure that the auxiliary circuit breaker is providing power to the outdoor unit: 1-phase power
supply (L1,L2).
•
Ensure that the thermistor sensor, drain pump and hose, and wireless receiver are correctly
connected.
•
Ensure that the power and communication cables of the indoor and outdoor units are properly
connected.
•
Before supplying power, use a resistance tester to verify that resistance to ground is greater
than 30 M.
•
Ensure that the indoor unit is connected.
•
Check for a short-circuit between the communication terminal and ground.
•
Ensure that the pre-start checklist (Table 20) has been completed.
Table 20. Pre-start checklist
Outdoor unit
•
•
•
•
Indoor unit
• Have you checked the external surface and the inside of the indoor unit?
• Is there enough space for service?
• Have you ensured that the center of the indoor unit is installed horizontally and is level?
Installation
•
•
•
•
Refrigerant pipe
•
•
•
•
Have you checked the external surface and the inside of the unit for damage?
Is there any possibility of short circuit due to the heat produced by the outdoor unit?
Is the place well-ventilated and meets recommended requirements for clearances and service?
Is the outdoor unit installed securely to withstand external forces?
Have you selected the correct pipes?
Are the liquid and gas valve open?
Is the total number of connected indoor units within the allowable range?
Are the length and the height difference between the refrigerant pipes within the allowable
range?
Has the connection of liquid and gas pipes been correctly performed?
Have you selected correct insulator for pipes and insulated them correctly?
Is the pipe or connection part properly insulated?
Is the quantity of the additional refrigerant correctly weighed in? (You must record the amount
of additional refrigerant charging on the service record paper placed outside the outdoor unit.)
Drain pipe
• Have you checked whether the drain pipes of the indoor unit and outdoor unit are connected
together?
• Have you completed the drain test?
• Is the drain pipe properly insulated?
Electrical
• Are the power cable and communication cable tightened firmly on the terminal board within the
rated torque recommendations?
• Have you checked for cross connection of the power and communication cables?
• Have the outdoor unit been properly grounded?
• Is the communication cable shielded?
• Is the wire length within the recommended limit?
• Is the wiring route correct?
Setting address
• Are the address of the indoor and outdoor units properly set?
• Are the address of the indoor and outdoor units properly set, if multiple remote controllers are
to be used?
Option
• Ensure that the vibration-isolation structure is correctly installed or if one needs to be installed.
42
MS-SVN045A-EN
Test Operation
After all pre-start checks (refer to “Pre-Start Checks” p. 42) have been have been completed, run the
test operation under the following conditions:
122 (50)
Outdoor temperature: °F (°C)
104 (40)
86 (30)
68 (20)
Cooling
50 (10)
Heating
32 (0)
14 (-10)
-4 (-20)
41 (5) 50 (10) 59 (15) 68 (20) 77 (25) 86 (30) 95 (35) 104 (40) 113 (45)
Indoor temperature: °F (°C)
Notes:
• Within the temperature range marked with hashed lines, system protection control may trigger during the test
operation. If this occurs, test results may be inaccurate.
• If the unit responds to outdoor conditions by operating in defrost mode, test results may be inaccurate.
• If the temperature is outside of the guaranteed range, test accuracy may decrease to the borderline area shown in
the graph.
WARNING
Hazardous Voltage, Rotating Components!
Do not operate the product with the panel or duct outlet protection net off. There is risk of
personal injury from parts that rotate or contain high voltage.
CAUTION
Risk of Burn or Frostbite!
Refrigerant pipe may be hot or cold during or right after the operation depending on the status
of the refrigerant which flows through the refrigerant pipe, compressor, and other parts of the
refrigerant cycle. Do not touch the refrigerant pipe during or immediately after the operation to
avoid getting burned or frostbitten.
NOTICE
Avoid Unit Damage!
Wait at least 5 minutes before turning off the main power after the test operation is finished. If
you do not, water leakage or other problems may occur.
Wait at least 3 hours after power is supplied to the outdoor unit before operating it to allow
time for the crank case heater to pre-heat. If the crank case heater is not pre-heated before
operation, unit parts are at risk of being seriously damaged.
1. Before powering the unit, heed the precautions given above for the test operation.
Note: When power is supplied to the outdoor unit, it will check for and verify communications
with the indoor unit.
2. Ensure that the front of the outdoor unit is closed.
MS-SVN045A-EN
43
Test Operation
3. Press buttons K1 or K2 to run the test operation as described in the Table 21, p. 44 and Table 22,
p. 44.
4. The first two digits of the 7-segment display respond as shown in the last column of the
tables.
Table 21. Button K1
Number of times K1
is pressed
1
Heating test mode
2
Defrost test mode
Operation
7-segment display:
Digits 1 and 2
Operation
7-segment display:
Digits 1 and 2
Table 22. Button K2
Number of times
button K2 is
pressed
1
Cooling test mode
2
Inverter check function
(load control board inspection operation).
3
Pump down in cooling mode
5. After 12 minutes of stable operation, check the following:
• Cooling mode (indoor unit check): Inlet air temperature–outlet air temperature  18°F (–7.8°C)
(reference only)
• Heating mode (indoor unit check): Inlet air temperature–outlet air temperature  19.8°F 
(–6.8°C) (reference only)
• In heating mode, the indoor fan motor can remain off to avoiding blowing cold air into the
heated space.
6. Press the K3 button for more than 1 second to reset the outdoor unit power supply, to deactivate test mode, or to reset an error code.
44
MS-SVN045A-EN
Service: Pump Down Procedure
WARNING
Refrigerant under High Pressure!
Failure to follow code concerning could result in an explosion which could result in death or
serious injury or equipment damage. The refrigerant container used to collect refrigerant from
the system must be one that is exclusively designed for that purpose.
NOTICE
Equipment Damage!
Do not allow the amount of system refrigerant that is pulled into the outdoor unit during the
pump down process to exceed the capacity of the outdoor unit or equipment damage may
occur.
1. Remove the cap from the low pressure side.
Type A and B units (24, 30, 36, 42, 48 MBH)
High-pressure
(liquid) side
Low-pressure
(gas) side
Type C units (18 MBH)
Low-pressure
(gas) side
High-pressure
(liquid) side
2. Close the gas side service valve, connect a manifold gauge to the valve, and open the valve
again.
3. Press the K2 button once on the outdoor unit control board to set the unit to the cooling test
mode. (Make sure the compressor is running.)
4. Close the liquid side service valve.
5. When the manifold gauge indicates that the pressure is lower than 0 psig (0 MPa), close the gas
side service valve.
6. Press the K3 button once to reset the system and stop the pump down procedure.
7.
Remove the manifold gauge.
8. Cap each valve.
MS-SVN045A-EN
45
Relocating the Outdoor Unit
If the outdoor unit is to be moved to a different location, follow this procedure:
1. Perform the pump down procedure (“Service: Pump Down Procedure” p. 45).
2. Remove the power cord.
3. Disconnect the assembly cable from the indoor and outdoor units.
4. Remove the flare nut that connects the indoor unit to the refrigerant pipe and disconnect them.
5. Cap or plug the disconnected pipes to keep foreign matter out of them.
6. Disconnect the refrigerant pipe from the outdoor unit.
7.
Cap or plug the disconnected pipes to keep foreign matter out of them.
8. Store the connection pipes with the cables, making sure you do not bend the pipes.
9. Move the indoor and outdoor units to the new location.
10. Remove the mounting plate for the indoor unit and move it to a new location.
46
MS-SVN045A-EN
Warranty
Warranty
For Trane C-Series Ductless Systems and Related Accessories
Products Covered—This warranty is extended by Trane, and applies to all Trane C-Series Ductless
Systems and Accessories for these products which are sold by Trane and applied in accordance
with Trane specifications.
Basic Warranty—The warrantor warrants for a period of 10 years from the initial start-up or 10 years
and 6 months from date of shipment, whichever is less, against failure due to defects in material
and manufacture and that it has the capacities and ratings set forth in Company's catalogs and
bulletins ("Warranty").
If any part of your C-Series Ductless System fails because of a manufacturing defect under normal
use and maintenance within the Limited Warranty Period, the Company will furnish the required
replacement part. If the compressor, outdoor coil or indoor coil should be the part that fails during
the Limited Warranty Period, the affected unit will be replaced. The purchaser must pay for any and
all shipping and handling charges and other costs of warranty service for the replacement part
including, but not limited to, any related service labor, diagnosis calls and refrigerant.
Exclusions and Limitations—Exclusions from this Warranty include damage or failure arising from:
wear and tear; corrosion, erosion, deterioration; modifications made by others to the Equipment;
repairs or alterations by a party other than Company that adversely affects the stability or reliability
of the Equipment; vandalism; neglect; accident; adverse weather or environmental conditions;
abuse or improper use; improper installation; commissioning by a party other than Company;
unusual physical or electrical or mechanical stress; operation with any accessory, equipment or
part not specifically approved by Company; refrigerant not supplied by Company; and/or lack of
proper maintenance as recommended by Company. Company shall not be obligated to pay for the
cost of lost refrigerant or lost product. Company's obligations and liabilities under this Warranty
are limited to furnishing replacement equipment or parts, at its option, FCA (Incoterms 2000)
factory or warehouse (f.o.b. factory or warehouse for US domestic purposes) at Companydesignated shipping point, freight-allowed to Company's warranty agent's stock location, for all
non-conforming Company-manufactured Equipment (which have been returned by Customer to
Company. Returns must have prior written approval by Company and are subject to restocking
charge where applicable. Equipment, material and/or parts that are not manufactured by Company
are not warranted by Company and have such warranties as may be extended by the respective
manufacturer. COMPANY MAKES NO REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED,
REGARDING PREVENTION OF MOLD/MOULD, FUNGUS, BACTERIA, MICROBIAL GROWTH, OR
ANY OTHER CONTAMINATES. No warranty liability whatsoever shall attach to Company until
Customer's complete order has been paid for in full and Company's liability under this Warranty
shall be limited to the purchase price of the Equipment shown to be defective. EXCEPT FOR
COMPANY'S WARRANTY EXPRESSLY SET FORTH HEREIN, COMPANY DOES NOT MAKE, AND
HEREBY EXPRESSLY DISCLAIMS, ANY WARRANTIES, EXPRESS OR IMPLIED CONCERNING ITS
PRODUCTS, EQUIPMENT OR SERVICES, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY
OF DESIGN, MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE, OR OTHERS
THAT ARE ALLEGED TO ARISE FROM COURSE OF DEALING OR TRADE.
If you wish further help or information concerning this warranty, contact: Trane-Warrantor, 2701
Wilma Rudolph Blvd., Clarksville, TN. 37040.
MS-SVN045A-EN
47
The manufacturer optimizes the performance of homes and buildings around the world. A business of Ingersoll
Rand, the leader in creating and sustaining safe, comfortable and energy efficient environments, the manufacturer
offers a broad portfolio of advanced controls and HVAC systems, comprehensive building services, and parts. For
more information, visit www.IRCO.com.
The manufacturer has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.
© 2015 Trane. All rights reserved.
MS-SVN045A-EN
(NEW)
29 May 2015
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