Trane 4TVH072B300NB, 4TVH072B400NB, 4TVR072B300NB, 4TVR072B400NB, 4TVH096B300NB Installation and Maintenance Manual

Installation, Operation,
and Maintenance

Variable Refrigerant Flow System

Outdoor Unit Series

Models: (HP, 208–230 V) (HP, 460 V) (HR, 208–230 V) (HR, 460V)

4TVH072B300NB 4TVH072B400NB 4TVR072B300NB 4TVR072B400NB
4TVH096B300NB 4TVH096B400NB 4TVR096B300NB 4TVR096B400NB
4TVH120B300NB 4TVH120B400NB 4TVR120B300NB 4TVR120B400NB
4TVH144B300NB 4TVH144B400NB 4TVR144B300NB 4TVR144B400NB

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.

February 2013 VRF-SVN34A-EN

DB68-03592A(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:

WARNING

CAUTIONs

NOTICE

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.

Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.

Indicates 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.

Indicates a situation that could result in
equipment or property-damage only.

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.

© 2013 Trane All rights reserved VRF-SVN34A-EN

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Warnings, Cautions, and Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Model Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Preparing for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Unit Dimensions and Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Service Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Outdoor Unit Combinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Moving the Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Base Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Minimizing Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Water Management Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Securing the Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Condenser Air Discharge Duct (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Wind/Snow Prevention Duct Installation (optional) . . . . . . . . . . . . . . . . . . . . 19

Important Environmental Concerns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Important Responsible Refrigerant Practices . . . . . . . . . . . . . . . . . . . . . . . 2

Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Selecting Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Heat Pump Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Heat Recovery Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Identifying Branch Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Pipe Minimum Thickness and Temper Grade Based on Pipe Size . . . . . 25

Storing Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Evacuating Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Installing Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Pipe Cutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Nitrogen Flushing While Brazing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Flared Pipe Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Connecting Piping to the Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Connecting Branch Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Refrigerant Piping Installation Examples: Heat Pump . . . . . . . . . . . . . . . 32

Refrigerant Piping Installation Examples: Heat Recovery . . . . . . . . . . . . 35

Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

VRF-SVN34A-EN 3

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Communications Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Leak Testing Pipe Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Vacuum Procedure for the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Insulating Refrigerant Pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Refrigerant Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Calculating Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Charging Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

System Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

System Configuration: DIP and Rotary Switches . . . . . . . . . . . . . . . . . . . . . . 54

System Configuration: Buttons K1–K4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Pre-Start Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Test Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Automatic refrigerant detection operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Warranty For Trane Advantage™ VRF Systems and Related Accessories . . . 66

Basic Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Exclusions and Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

4 VRF-SVN34A-EN

Model Number Description

4TVS0086B300NA

1234567891011121314

Digit 1: Refrigerant

4 = R410A

Digit 2: Brand name

T = Trane

Digit 3: System type

V = Variable Refrigerant Flow

Digit 4: Functional Type
Outdoor Unit

T = Cooling Only, Digital Scroll (VRF)
F = Cooling Only, DC Inverter (VRF)
S = Heat Pump, Digital Scroll (VRF)
H = Heat Pump, DC Inverter (VRF)
R = Heat Recovery (3-pipe), DC
Inverter (VRF)
K = Heat Recovery (3-pipe), Digital
Scroll (VRF)

Digit 5: Reserved for future use

0 = Standard

Digit 6, 7, 8: Nominal capacity
(Btu/h x 1,000)

036 = 36,000 Btu/h
048 = 48,000 Btu/h
060 = 53,000 Btu/h
072 = 72,000 Btu/h
096 = 96,000 Btu/h
120 = 120,000 Btu/h
144 = 144,000 Btu/h

Digit 13: Region of sale

N = North America (UL or ETL)

Digit 14: Minor design sequence

A = First design sequence
B = Second design sequence

Digit 9: Major development
sequence

B = Second development sequence
(Samsung)

Digit 10: Electric power supply
characteristics

1 = 220/60/1
3 = 208–230/60/3
4 = 460/60/3
6 = 220/60/3

Digit 11: Coil fin protection

0 = Standard
B = Blue fin
C = Corrosion resistant

Digit 12: Reserved for future
use

0 = Not currently used

VRF-SVN34A-EN 5

Preparing for Installation

Unit Dimensions and Weight

Table 1. Unit dimensions and weight

Dimensions

(WxHxD)

in. (mm)

34.6x66.7x30.1

(880x1695x765)

51.0x66.7x30.1

(1295x1695x765)

34.6x66.7x30.1

(880x1695x765)

51.0x66.7x30.1

(1295x1695x765)

34.6x66.7x30.1

(880x1695x765)

51.0x66.7x30.1

(1295x1695x765)

34.6x66.7x30.1

(880x1695x765)

51.0x66.7x30.1

(1295x1695x765)

Unit type

Heat Pump

(203–230 V)

Heat Recovery

(203–230 V)

Heat Pump

(460 V)

Heat Recovery

(460 V)

Unit model

number

4TVH0072B300NB

4TVH0096B300NB

4TVH0120B300NB

4TVH0144B300NB 657.0 (298) 698.9 (317)

4TVR0072B300NB

4TVR0096B300NB

4TVR0120B300NB

4TVR0144B300NB 672.4 (305) 714.3 (324)

4TVH0072B400NB

4TVH0096B400NB

4TVH0120B400NB

4TVH0144B400NB 672.4 (305) 714.3 (324)

4TVR0072B400NB

4TVR0096B400NB

4TVR0120B400NB

4TVR0144B400NB 692.3 (314) 734.1 (333)

Weight
lb (kg)

425.5 (193)

623.9 (283)

425.5 (193)

637.1 (289)

436.5 (198)

540.1 (245)

445.3 (202)

553.4 (251)

Shipping

dimensions

(WxHxD)

in. (mm)

37.3x75.3x32.8

(948x1912x832)

53.7X75.3x32.8

(1363x1912x832)

37.3x75.3x32.8

(948x1912x832)

53.7X75.3x32.8

(1363x1912x832)

37.3x75.3x32.8

(948x1912x832)

53.7X75.3x32.8

(1363x1912x832)

37.3x75.3x32.8
(948x1912x832)

53.7X75.3x32.8

(1363x1912x832)

Shipping weight

lb (kg)

460.8 (209)

665.8 (302)

460.8 (209)

679.0 (308)

471.8 (214)

582.0 (264)

480.6 (218)

595.2 (270)

6 VRF-SVN34A-EN

Figure 1. Dimensional drawing: 4TVH072****/4TVR072****

782 (30.79)

560 (22.05) 880 (34.05) 560 (22.05)

871 (34.29)

765 (30.12)

550 (21.65)

2300 (90.55)

668 (26.30)

532 (20.94)

2271 (89 41)

1134 (44.65)

965 (37.99)

180 (7.09)

1632 (64.25)

1150 (45.28)

980 (38.58)

180 (7.09)

2000 (78.74)

127 (5) 593 (23.35)

1318 (51.89)

1210 (47.64)

612 (24.09)

108 (4.25)

Units: mm (inches)

A

A: Optional condenser air discharge duct
B: Optional wind/snow protection duct

A

B

B

B

B

B

B

1197 (47.13)

2415 (95.08)

560 (22.05) 560 (22.05)1295 (50.98)

593 (23.35)127 (5)

1318 (51.89)

1210 (47.64)

612 (24.09)

108 (4.25)

2300 (90.55)

1632 (64.25)

1150 (45.28)

980 (38.58)

180 (7.09)

871 (34.29)

765 (30.12)

550 (21.65)

668 (26.30)

532 (20.94)

2271 (89.41)

1134 (44.65)

965 (37.99)

180 (7.09)

Units: mm (inches)

A

A

B

BB

B

B

B

A: Optional condenser air discharge duct
B: Optional wind/snow protection duct

Preparing for Installation

VRF-SVN34A-EN 7

Figure 2. Dimensional drawing: 4TVH096/120/144****/4TVR096/120/144****

Preparing for Installation

4 (100)

S2: 4 (100)

S1: 20 (500)

4 (100)

12 (300)

4 (100)

Example 1: Single unit inside pit

Example 2: Single unit inside wall

Front

Front

S1: 20 (500)

16 (400)

16 (400)

4 (100)4 (100)4 (100)4 (100)4 (100)4 (100)

4 (100)

S2: 12 (300)

8 (200)

12 (300)

4 (100)

Notes:
Units: inches (mm)

S1 = Front service clearance
S2 = Back service clearance
See Figure 4, p. 9 for details.

You may install multiple outdoor units with a minimum 1 in.
(20 mm) of space between them, but reduced capacity may
occur depending on the installation environment.

Clearance requirements are waived for any unit sides that have
wind/snow protection ducts installed on them, due to the
wind/snow protection duct size, which exceeds clearance
requirements.

Front

Example 3: Multiple units inside pit

Example 4: Multiple units inside wall

Example 5: Multiple units inside pit

Front

Front

Front

Service Clearances

Install units as shown in the illustrations below, 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.

Figure 3. Minimum service clearances for single and multiple units

8 VRF-SVN34A-EN

4 (100)

4 (100)

4 (100)

4 (100)

4 (100)

4 (100)

20 (500)

24 (600)

20 (500)

Figure 4. Dimension limits for pit

Front side

Front wall height recommendation: 60 in. (1500 mm) maximum.
Back wall height recommendation: 20 in. (500 mm) maximum.
Side wall height is unlimited.

If a wall exceeds the recommended height, an additional clearance of half of the exceeded height should be added
to the service clearance. (Clearances are given in Figure 3, p. 8).

S1 = Front service clearance
S2 = Back service clearance
h1 = Wall height in excess of 60 in. (1500 mm)
h2 = Wall height in excess of 20 in. (500 mm)

S1+h1/2

S2+h1/2

60 (1500)

h1

20 (500)

h2

Note: This figure refers to Figure 3, examples 1, 3, 5.

Preparing for Installation

Outdoor Unit Combinations

Use the following table to determine the size and number of outdoor units needed to achieve the
capacity requirements.

Follow these guidelines:

• Make sure to use indoor units that are compatible with the outdoor unit.

VRF-SVN34A-EN 9

• The minimum capacity of an indoor unit is 7.5 MBH (7500 Btu/h).

• Indoor units can be connected within the ranges indicated in Ta b le 2 and Ta bl e 3.

• If the total capacity of the connected indoor units exceeds the indicated maximum capacity, the
cooling and heating capacity of the indoor unit may decrease.

• You can connect a maximum of 64 indoor units to the outdoor unit. The maximum quantity of
connectable indoor units is 64 because the outdoor unit supports a maximum of 64
communication addresses.

• If you choose to select outdoor unit combination other than the ones in Ta bl e 2 or Ta bl e 3, the
total capacity of connected indoor units is allowed to be 50%–130% of the outdoor unit capacity:
[0.5 x total outdoor unit capacity

total connected indoor unit capacity 1.3 × total outdoor unit

capacity].

Preparing for Installation

Table 2. Outdoor unit combinations: 6–20 ton capacity

Capacity

Outdoor unit
number

Total number
outdoor

Combined
outdoor
unit

Nominal
Capacity

Rated
Capacity

Tot al
capacity
of
connected
indoor
units
(cooling)

Maximum number
connectable

combination

of

units

4TV*0072*****

4TV*0096*****

4TV*0120*****

4TV*0144*****

Cooling (Btu/h)

Heating (Btu/h)

Cooling (Btu/h)

Heating (Btu/h)

Minimum (Btu/h)

Maximum (Btu/h)

indoor units

individual

of

6 ton 8 ton 10 ton 12 ton 14 ton 16 ton 18 ton 20 ton

4TV*0072***** 4TV*0096***** 4TV*0120***** 4TV*0144***** 4TV*0168***** 4TV*0192***** 4TV*0216***** 4TV*0240*****

11112222

1111

11

112

72000 96000 120000 144000 168000 192000 216000 240000

81000 108000 135000 162000 189000 216000 243000 270000

69000 92000 114000 138000 161000 183000 207000 228000

77000 103000 129000 154000 180000 206000 231000 258000

36000 48000 60000 72000 84000 96000 108000 120000

93600 124800 156000 187200 218400 249600 280800 312000

12 16 20 25 29 33 37 41

Table 3. Outdoor unit combinations: 22–36 ton capacity

Capacity

Model name for

Combination

Total number
outdoor

Combine
d outdoor
unit

Nominal
capacity

Rated
capacity

Tot al
capacity
of

indoor
units
(cooling)

Maximum number
connectable

of

units

4TV*0072

4TV*0096*****

4TV*0120*****

4TV*0144*****

Cooling (Btu/h)

Heating (Btu/h)

Cooling (Btu/h)

Heating (Btu/h)

Minimum (Btu/h)

Maximum (Btu/h)

indoor units

individual

*****

of

22 ton 24 ton 26 ton 28 ton 30 ton 32 ton 34 ton 36 ton

4TV*0264***** 4TV*0288***** 4TV*0312***** 4TV*0336***** 4TV*0360**** 4TV*0384***** 4TV*0408**** 4TV*0432*****

22333333

111

1

1121

12112123

264000 288000 312000 336000 360000 384000 408000 432000

297000 324000 351000 378000 405000 432000 459000 486000

252000 276000 299000 321000 345000 366000 390000 414000

283000 308000 334000 360000 385000 412000 437000 462000

132000 144000 156000 168000 180000 192000 204000 216000

343200 374400 405600 436800 468000 499200 530400 561600

45 49 54 58 62 64 64 64

11

10 VRF-SVN34A-EN

Accessories

Cutting line

ID3/4 in.

ID7/8 in.

ID 1 in.

ID 1-1/8 in. ID3/8 in.

ID 5/8in.

ID 1/2 in.

Accessories that ship with the unit are:

• Instruction manual

• Brand label and instruction sheet

• Pipe installation sockets (see Ta bl e 4 and Figure 5).

Table 4. Pipe installation socket size chart

Model number Connection type

4TV*0072***** (6 ton)

4TV*0096***** (8 ton)

4TV*0120***** (10 ton)

4TV*0144***** (12 ton)

(a) Cut socket as needed for 8, 10, and 12 ton units.

(a)

Unit connection

Field connection

Unit connection 1-1/8 in. 1/2 in. 7/8 in.

Field connection 7/8 in. 3/8 in. 3/4 in. 7/8 in. 3/8 in.

Unit connection

(a)

Field connection 3/4 in. 1-1/8 in.

Unit connection

(a)

Field connection 1/2 in. 7/8 in.

Preparing for Installation

Heat recovery Heat pump

High-

pressure

Gas Liquid

3/4 in. 3/8 in. 5/8 in. No 3/4 in. 3/8 in. No

1-1/8 in. 1/2 in.

1-1/8 in.

5/8 in. 1-1/8 in.

gas

7/8 in.

Socket

needed

Yes

Yes

Yes 1-1/8 in. 1/2 in. No

Gas Liquid

1 in. 1/2 in.

1 in.

1/2 in. Yes

Socket

needed

Yes

Figure 5. Pipe installation sockets

Ta b le 5 shows optional accessories for outdoor units.

Table 5. Optional accessories

Accessory Model number Specification

4YDK1509B0051A 51 MBH and below

4YDK2512B0138A Over 51–136 MBH

4YDK2812B0160A Over 136–154 MBH

Y-j oi n t

Y-j oi n t
(high-pressure gas for heat recovery units)

Y-joint for outdoor unit 4TDK3819B0000A 456 MBH and below

High-pressure Y-joint for outdoor unit 4TDK3100B0000A 456 MBH and below

4YDK2815B0240A Over 154–240 MBH

4YDK3419B0336A Over 240–336 MBH

4YDK4119B0468A Over 336–461 MBH

4YDK4422B0999A Over 461 MBH

4YDK1500B0080A 76 MBH and below

4YDK2500B0240A Over 76–240 MBH

4YDK3100B0468A Over 240–461 MBH

4YDK3800B0999A Over 461 MBH

VRF-SVN34A-EN 11

Preparing for Installation

Moving with a crane Moving with a forklift

Holes for wire cable
to pass through

Holes for inserting forklift

Wire cables

Holes for wire cable
to pass through

Spreader bars

Table 5. Optional accessories (continued)

Accessory Model number Specification

Distribution header

Electronic expansion valve (EEV) kit

(a) Required for indoor units that do not have internal EEVs. Refer to the EEV kit installation guide (VRF-SVN43) for detailed

information.

Moving the Outdoor Unit

Follow these guidelines when moving the outdoor unit:

• Before moving the outdoor unit, determine a path that can support its weight.

• Do not lay the unit on its side and do tip it 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 the figure below. To protect

damage or scratches to the unit, use a spreader bar.

– If moving the unit with a forklift, carefully insert forks into the forklift holes at the bottom of

the outdoor unit. Be careful with to avoid damaging the unit with the forklift.

(a)

4HJK2512B0159A 154 MBH and below (for 4 rooms)

4HJK3115B0241A 240 MBH and below (for 8 rooms)

4HJK3819B0998A Over 240 MBH (for 8 rooms)

4EEVEVA24SA000 Below 12 MBH (for 1 indoor unit)

4EEVEVA32SA000 Over 18 MBH (for 1 indoor unit

4EEVXDA24K132A

4EEVXDA24K200A

4EEVXDA32K200A 17-31 MBH (for 2 indoor units)

4EEVXDA24K232A

4EEVXDA24K300A

4EEVXDA32K224A 17-31 MBH (

4EEVXDA32K300A 17-31 MBH (

7‐15.5MBH(for 2 indoor units )

7‐15.5MBH(for 2 indoor units)

7‐15.5MBH(for 3 indoor units)

7‐15.5MBH(for 3 indoor units)

for3indoorunits)

for3indoorunits)

12 VRF-SVN34A-EN

Location Considerations

Sea Sea

Sea

Sea breeze

Sea breeze

Protection wall

Sea breeze

ODU

ODU

ODU

ODU

ODU

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. The supporting

structure can be a base on the ground, on a waterproof roof, or in a pit.

– With sufficient clearances around the unit for service and repairs.

– On a flat surface that does not collect water

– In a well ventilated location

– Away from strong wind

– Away from direct exposure to rain or snow

– 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 outdoor unit (ODU) 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 heat exchanger and applying a rust inhibitor
more frequently than once a year.

Preparing for Installation

– At least 9.84 ft (3 m) away from equipment that generates electromagnetic waves.

– Away from interfering sources, such as radio, computer, and stereo equipment.

– Far enough away from people living and working nearby so that hot discharge air or noise

do not disturb them.

– Away from inflammable materials.

• 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 from falls.

• If there is a potential for accumulated snow to block the air inlet or heat exchanger, install the
unit on a base higher than the highest possible snow accumulation.

VRF-SVN34A-EN 13

Preparing for Installation

• 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.

• Apply corrosion protection and any other protective coatings to the unit as appropriate to the
environment.

14 VRF-SVN34A-EN

Unit Installation

Ground installation

Base installation: Surface of
base must be horizontally level

Raised base

8 in. (200 mm) min.

8 in. (200 mm)

Drain pit

Base

H-beam or vibration-isolation frame

8 in. (200 mm)
minimum

8 in. (200 mm)
minimum

2 in. (50 mm)
minimum

H-beam frame on concrete supports

Follow these guidelines for installing the outdoor unit.

Important: The manufacturer is not responsible for damage incurred for installations that have

not followed these guidelines.

The outdoor unit must be installed:

– On a horizontally level surface.

– On a surface that is strong enough to support the unit and to minimize noise.

Base Recommendations

A supporting base for the outdoor unit:

• Is typically made of concrete.

• Should typically be 1.5 times larger than the bottom of the outdoor unit. However, for
installations that are subject to snow accumulation, the base should be no larger than the
bottom of the unit.

• Should be 8 in. (200 mm) or higher to protect the outdoor unit from rain water or other
conditions that may cause damage to the unit.

Note: The height of the base or, if the unit is installed on a frame (see “Minimizing Vibration”

p. 15), the height of the base plus the frame should be greater than the highest expected

snowfall.

• If necessary, has wire mesh or steel bars added to the concrete to prevent damages or cracks.

Unit Installation

Minimizing Vibration

To minimize outdoor unit vibrations, use a vibration-minimizing structure such as an H-beam
frame, a vibration-isolation frame, or an isolation pad (thickness > 1 in. [20 mm]). The load-bearing
force of the structure must be 787 lbf (3.5 kN).

VRF-SVN34A-EN 15

Unit Installation

Vibration-isolation frame

Ensure that
bolts are loose.

37.80 (960)

39.92 (760)

3.94 (100)

3.94 (100)

X

B

A

X’

3.15 (80)

3.15 (80)

3.15 (80)

60°

1.97 (50)

5.91 (150)

3.94 (100)

3.94

(100)

Notes:

• Units: inch (mm)

• Refer to Tab l e 7 for A and B.

Drainage direction
(slope: 1/50)

X - X’ section

3.15 (80)

3.15 (80)

3.15 (80)

3.15 (80)

3.15 (80)

3.15 (80)

3.15 (80)

3.15 (80)

60°

60°

7.87

(200)

7.87

(200)

BB

Notes:

• Units: inch (mm)

•Refer to Ta b l e 7 for A and B.

Drainage direction
(slope: 1/50)

After installing a vibration-isolation frame, loosen the bolts so that the isolators are capable of
absorbing vibrations (refer to the figure below).

Water Management Recommendations

If the outdoor unit base is on ground level, construct a drainage pit around it to prevent the drain
water from collecting near the unit.

• Use wire mesh or steel bar for constructing the drainage pit.

• Construct the pit with a slope of 1:50.

Figure 6. Water management for single-unit installation

Figure 7. Water management for multiple-unit installation

16 VRF-SVN34A-EN

Securing the Outdoor Unit

A

B

Isolation mounts:

4 holes, 0.71 (18)

Outdoor unit:

4 holes, 0.47 (12)

2.13 (54)

30.0 (761)

31.6 (803)

Notes:

•Units: inch (mm)

•Refer to Ta b l e 7 for A and B.

•

Refer to the blueprints in the
technical data book for hole
specifications for mounting.

a

b

c

m

Secure the outdoor unit firmly to the base with anchor bolts (see Figure 8 and Ta b le 6).

• Use zinc-plated or stainless steel nuts and bolts.

• It must be able to withstand the wind speed of 67 mph (30 m/s).

• Use a rubber washer between the bolt and the outdoor unit to prevent bimetallic corrosion.

• If you cannot attach the outdoor unit to the base, secure it from the side or to an additional
structure.

Figure 8. Bolt hole sizes and locations for mounting the outdoor unit

Unit Installation

Table 6. Anchor specification

Size
(m)

10 mm 1/2 in. (14 mm) 3 in. (75 mm) 1-1/2 in. (40 mm) 2 in. (50 mm)

Drill bit

diameter (a)

Anchor length

(b)

Sleeve length

(c)

Insertion depth

Fastening

265.5 in·lbf

Table 7. Unit and bolt dimensions

4TVH072*****

Dimensions

Unit width (A) 37.01 in. (940 mm) 53.15 in. (1350 mm)

Distance between bolts (B) 29.13 in. (740 mm) 45.28 in. (1150 mm)

4TVR072*****

4TVH096/120/144*****
4TVR096/120/144*****

torque

(30 N·m)

VRF-SVN34A-EN 17

Unit Installation

Examples of condenser air discharge ducts

Discharge air

Discharge air

Suction air

Grille/louvers

Upper floor

Balcony

Mechanical room

Condenser Air Discharge Duct (optional)

CAUTION

Sharp Edges!

Working with galvanized sheet metal involves working with sharp edges. To avoid being cut,
technicians MUST put on all necessary Personal Protective Equipment (PPE), including gloves
and arm guards.

If you remove the fan guard to install the discharge duct, make sure to install a safety net on
the duct outlet to prevent foreign substances from entering the unit and to prevent the risk of
personal injury from sharp fan blades.

A discharge duct can be installed on the outdoor unit to prevent foreign substances from entering
the unit.

The static pressure of the discharge duct should be within the standard specification of 0.02 inches
of water (78.45 Pa) when installing the duct.

If it is difficult to provide a minimum of 6.56 ft (2 m) of space between the air outlet and nearby
obstacles, direct the discharge air horizontally from the fan.

18 VRF-SVN34A-EN

Wind/Snow Prevention Duct Installation (optional)

A wind/snow prevention should be installed:

• In snowy regions, to prevent snow from accumulating on the outdoor unit and the risk of
accumulated frost, which may interfere with normal heating operation.

• In windy regions, such as near a sea shore, to protect the unit from humid air.

Install the duct so that:

• The discharge air and prevailing wind are not going the same direction.

• The discharge air is not directed to the enclosed area.

• Height (h) of the frame or base should be higher than the heaviest expected snowfall.

Unit Installation

VRF-SVN34A-EN 19

Refrigerant Piping

A(2)

B

C

A(3)

A(1)

D

E

F

10 ton10 ton

8 ton

8 ton

Outdoor

unit

capacity

(ton)

Pipe A

Pipe size (OD)

Liquid

in. (mm)

Gas

in. (mm)

10 A(1) 1/2 (12.70) 1-1/8 (28.58)

18 A(2) 5/8 (15.88) 1-1/8 (28.58)

26 A(3) 3/4 (19.05) 1-3/8 (34.92)

Key

A(1): Select based on individual outdoor unit capacity (Table 8, p. 21).
A(2): Select based on the sum of outdoor unit capacity behind the first outdoor unit multi-connection (Tab l e 8 , p. 2 1 ).
A(3): Select based on the sum of outdoor unit capacity before the first branch joint (Table 8, p. 21).
B: Pipes between branch joints (Tab l e 9 , p . 2 1)
C: Outdoor joints between outdoor units (Table 14, p. 24)
D: First branch joint (Table 15, p. 24))
E: Branch joints to indoor units (Table 16, p. 25))
F: Pipe size between branch joints and indoor units (Table 13, p. 24)

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 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 hydro­sanitary applications is unsuitable.

• 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.

Heat Pump Applications

The example in Figure 9 shows a 26-ton capacity heat pump system with pipe diameters specified.

Figure 9. Heat pump system example

20 VRF-SVN34A-EN

Use Tab le 8 to determine the size of the main pipes based on pipe length. (Refer to A in Figure 13,

p. 32)

Table 8. Outdoor unit main pipe size based on pipe length (A)

Refrigerant Piping

Outdoor unit

capacity

when pipe length is  295.3 ft (90 m)

Ton MBH

6 72 3/8 (9.52) 3/4 (19.05) 1/2 (12.70) 7/8 (22.22)

8 96 3/8 (9.52) 7/8 (22.22) 1/2 (12.70) 1 (25.4)

10 120 1/2 (12.70) 1-1/8 (28.58) 5/8 (15.88) 1-1/8 (28.58)

12 144 1/2 (12.70) 1-1/8 (28.58) 5/8 (15.88) 1-1/4 (31.75)

14 168 5/8 (15.88) 1-1/8 (28.58) 3/4 (19.05) 1-1/4 (31.75)

16 192 5/8 (15.88) 1-1/8 (28.58) 3/4 (19.05) 1-1/4 (31.75)

18 216 5/8 (15.88) 1-1/8 (28.58) 3/4 (19.05) 1-1/4 (31.75)

20 240 5/8 (15.88) 1-1/8 (28.58) 3/4 (19.05) 1-1/4 (31.75)

22 264 3/4 (19.05) 1-3/8 (34.92) 7/8 (22.22) 1-1/2 (38.1)

24 288 3/4 (19.05) 1-3/8 (34.92) 7/8 (22.22) 1-1/2 (38.1)

26 312 3/4 (19.05) 1-3/8 (34.92) 7/8 (22.22) 1-1/2 (38.1)

28 336 3/4 (19.05) 1-3/8 (34.92) 7/8 (22.22) 1-1/2 (28.1)

30 360 3/4 (19.05) 1-5/8 (41.28) 7/8 (22.22) 1-5/8 (41.28)

32 384 3/4 (19.05) 1 5/8 (41.28) 7/8 (22.22) 1-5/8 (41.28)

34 408 3/4 (19.05) 1 5/8 (41.28) 7/8 (22.22) 1-5/8 (41.28)

36 432 3/4 (19.05) 1 5/8 (41.28) 7/8 (22.22) 1-5/8 (41.28)

(a) If 1 (25.4) pipe is not available on site, use 1 1/8 (28.58) pipe.
(b) If 1-1/4(31.75) pipe is not available on site, use 1 3/8 (34.92) pipe.
(c) If 1-1/2 (38.1) pipe is not available on site, use 1 5/8 (41.28) pipe.

Main pipe size (OD)

Liquid

in. (mm)

Gas

in. (mm)

when pipe length > 295.3 ft (90 m)

Main pipe size (OD)

Liquid

in. (mm)

in. (mm)

Gas

(a)

(b)

(b)

(b)

(b)

(b)

(c)

(c)

(c)

(c)

Use Ta b le 9 to determine the size of pipes between branch joints. (Refer to B in Figure 13, p. 32.)

Table 9. Pipe size between branch joints (B)

Branch pipe size (OD) when pipe is

Indoor unit

total capacity

(MBH)

Less than 51 3/8 (9.52) 5/8 (15.88) 1/2 (12.70) 3/4 (19.05)

51-75.9 3/8 (9.52) 3/4 (19.05) 1/2 (12.70) 7/8 (22.22)

76-95.9 3/8 (9.52) 7/8 (22.22) 1/2 (12.70) 1 (25.4)

96-135.9 1/2 (12.70) 1-1/8 (28.58) 5/8 (15.88) 1-1/8 (28.58)

136-153.9 1/2 (12.70) 1-1/8 (28.58) 5/8 (15.88) 1-1/4 (31.75)

154-239.9 5/8 (15.88) 1-1/8 (28.58) 3/4 (19.05) 1-1/4 (31.75)

240-335.9 3/4 (19.05) 1-3/8 (34.92) 7/8 (22.22) 1-1/2 (38.1)

336–460.9 3/4 (19.05) 1-5/8 (41.28) 7/8 (22.22) 1-5/8 (41.28)

461–577 3/4 (19.05) 1 5/8 (41.28) 7/8 (22.22) 2-1/8 (53.98)

(a) If 1 (25.4) pipe is not available on site, use 1-1/8 (28.58) pipe.
(b) If 1-1/4 (31.75) pipe is not available on site, use 1-3/8 (34.92) pipe.
(c) If 1-1/2 (38.1) pipe is not available on site, use 1-5/8 (41.28) pipe.

147.6 ft (45 m)

Liquid

in. (mm)

Gas

in. (mm)

VRF-SVN34A-EN 21

Branch pipe size (OD) when pipe is

147.6–295.3 ft (45–90 m)

Liquid

in. (mm)

Gas

in. (mm)

(a)

(b)

(b)

(c)

Refrigerant Piping

A(2)

B

C

A(3)

A(1)

D

E

F

10 ton10 ton

8 ton

8 ton

Outdoor

unit

capacity

(ton)

Pipe A

Pipe size (OD)

Liquid

in. (mm)

Gas

in. (mm)

High-

pressure

gas

in. (mm)

10 A(1) 1/2 (12.70) 1-1/8 (28.58) 7/8 (22.22)

18 A(2) 5/8 (15.88) 1-1/8 (28.58) 1-1/8 (28.58)

26 A(3) 3/4 (19.05) 1-3/8 (34.92) 1-1/8 (28.58)

Key

A(1): Select based on individual outdoor unit capacity (Table 11, p. 23).
A(2): Select based on the sum of outdoor unit capacity behind the first outdoor unit multi-connection (Table 11, p. 23).
A(3): Select based on the sum of outdoor unit capacity before the first branch joint (Table 11, p. 23).
B: Pipes between branch joints (Table 12, p. 23)
C: Outdoor joints between outdoor units (Table 14, p. 24)
D: First branch joint (Table 15, p. 24))
E: Branch joints to indoor units (Table 16, p. 25))
F: Pipes between branch joints and indoor units (Table 13, p. 24)

Use Tab l e 1 0 to determine the size for pipes between branch joints and indoor units. (Refer to F in

Figure 13, p. 32.)

Table 10. Pipe size between the branch joint and indoor unit (F)

Indoor unit capacity

(MBH)

Less than 20 1/4 (6.35) 1/2 (12.70)

24-52 3/8 (9.52) 5/8 (15.88)

68–78 3/8 (9.52) 3/4 (19.05)

78–96 3/8 (9.52) 7/8 (22.22)

Heat Recovery Applications

The example in Figure 10 shows a 26-ton capacity heat recovery system with pipe diameters
specified.

Figure 10. Heat recovery system example

Liquid

in. (mm)

Pipe size (OD)

Gas

in. (mm)

22 VRF-SVN34A-EN

Use Ta b le 11 to determine the size of the main pipes (A in Figure 10, p. 22) based on pipe length.

Table 11. Outdoor unit main pipe size based on pipe length (A)

Refrigerant Piping

Main pipe size (OD)

Outdoor unit capacity

when pipe length is  295.3 ft (90 m)

when pipe length > 295.3 ft (90 m)

High-

Liquid

Ton MBH

6 72 3/8 (9.52) 3/4 (19.05) 5/8 (22.22) 1/2 (12.70) 3/4 (25.4) 5/8 (22.22)

8 96 3/8 (9.52) 7/8 (22.22) 3/4 (25.4) 1/2 (12.70) 7/8 (22.22) 3/4 (25.4)

10 120 1/2 (12.70) 1-1/8 (28.58) 7/8 (22.22) 5/8 (15.88) 1-1/8 (28.58) 7/8 (22.22)

12 144 1/2 (12.70) 1-1/8 (28.58) 7/8 (22.22) 5/8 (15.88) 1-1/8 (28.58) 7/8 (22.22)

14 168 5/8 (15.88) 1-1/8 (28.58) 7/8 (22.22) 3/4 (19.05) 1-1/8 (28.58) 7/8 (22.22)

16 192 5/8 (15.88) 1-1/8 (28.58) 1-1/8 (28.58) 3/4 (19.05) 1-1/8 (28.58) 1-1/8 (28.58)

18 216 5/8 (15.88) 1-1/8 (28.58) 1-1/8 (28.58) 3/4 (19.05) 1-1/8 (28.58) 1-1/8 (28.58)

20 240 5/8 (15.88) 1-1/8 (28.58) 1-1/8 (28.58) 3/4 (19.05) 1-1/8 (28.58) 1-1/8 (28.58)

22 264 3/4 (19.05) 1-3/8 (34.92) 1-1/8 (28.58) 7/8 (22.22) 1-3/8 (34.92) 1-1/8 (28.58)

24 288 3/4 (19.05) 1-3/8 (34.92) 1-1/8 (28.58) 7/8 (22.22) 1-3/8 (34.92) 1-1/8 (28.58)

26 312 3/4 (19.05) 1-3/8 (34.92) 1-1/8 (28.58) 7/8 (22.22) 1-3/8 (34.92) 1-1/8 (28.58)

28 336 3/4 (19.05) 1-3/8 (34.92) 1-1/8 (28.58) 7/8 (22.22) 1-3/8 (34.92) 1-1/8 (28.58)

30 360 3/4 (19.05) 1-5/8 (41.28) 1-3/8 (34.92) 7/8 (22.22) 1-5/8 (41.28) 1-3/8 (34.92)

32 384 3/4 (19.05) 1-5/8 (41.28) 1-3/8 (34.92) 7/8 (22.22) 1-5/8 (41.28) 1-3/8 (34.92)

34 408 3/4 (19.05) 1-5/8 (41.28) 1-3/8 (34.92) 7/8 (22.22) 1-5/8 (41.28) 1-3/8 (34.92)

36 432 3/4 (19.05) 1-5/8 (41.28) 1-3/8 (34.92) 7/8 (22.22) 1-5/8 (41.28) 1-3/8 (34.92)

(a) Increase the liquid pipe by one size if the pipe length > 295.3 ft (90 m), as specified in this column.

in. (mm)

Gas

in. (mm)

pressure gas

in. (mm)

Liquid
in. (mm)

Main pipe size (OD)

(a)

Gas

in. (mm)

Use Tab l e 1 2 to determine the size of pipes between branch joints. (Refer to B in Figure 10, p. 22.)

High-

pressure gas

in. (mm)

Table 12. Pipe size between branch joints (B)

Indoor unit total

capacity

(MBH)

Less than 51 3/8 (9.52) 5/8 (15.88) 5/8 (15.88)

51-75.9 3/8 (9.52) 3/4 (19.05) 5/8 (15.88)

76-95.9 3/8 (9.52) 7/8 (22.22) 3/4 (19.05)

96-114.9 1/2 (12.70) 1-1/8 (28.58) 3/4 (19.05)

115-153.9 1/2 (12.70) 1-1/8 (28.58) 1-1/8 (28.58)

154–171.9 5/8 (15.88) 1-1/8 (28.58) 1-1/8 (28.58)

172-239.9 5/8 (15.88) 1-1/8 (28.58) 1-1/8 (28.58)

240-335.9 3/4 (19.05) 1-3/8 (34.92) 1-1/8 (28.58)

336–359.9 3/4 (19.05) 1-5/8 (41.28) 1-1/8 (28.58)

360–460.9 3/4 (19.05) 1 5/8 (41.28) 1-3/8 (34.92)

461–577 3/4 (19.05) 1 5/8 (41.28) 1-3/8 (34.92)

Liquid

in. (mm)

VRF-SVN34A-EN 23

Branch pipe size (OD)

Gas

in. (mm)

High-pressure gas

in. (mm)

Refrigerant Piping

Use Tab l e 13 to determine the size for the pipes between branch joints and indoor units. (Refer to
F in Figure 10, p. 22.)

Table 13. Pipe size between the branch joint and indoor unit (F)

Indoor unit capacity (MBH)

Identifying Branch Joints

Use Ta b le 14 , Tab l e 15 , and Ta bl e 16 to identify branch joint models.

Note: High-pressure Y-joints are for heat recovery outdoor unit models only, as noted in each

table.

Table 14. Branch joint between outdoor units (C)

Pipe size (OD)

Liquid

in. (mm)

Less than 20 1/4 (6.35) 1/2 (12.70)

24-52 3/8 (9.52) 5/8 (15.88)

68–78 3/8 (9.52) 3/4 (19.05)

78–96 3/8 (9.52) 7/8 (22.22)

Gas

in. (mm)

Branch joint between outdoor units (C) Model

Y-joint 4TDK3819B0000A

High-pressure gas Y-joint (for heat recovery models) 4TDK3100B0000A

Use Ta b le 15 to select the first branch joint according to outdoor unit capacity. (Refer to D in

Figure 9, p. 20 (heat pump) or Figure 10, p. 22 (heat recovery.)

Table 15. First branch joint according to outdoor unit capacity (D)

Outdoor unit

capacity

First branch joint (D)

Y-j o int

High-pressure gas Y-joint (for heat recovery models)

(ton)

6, 8, 10 4YDK2512B0138A

12 4YDK2812B0160A

14, 16, 18, 20 4YDK2815B0240A

22, 24, 26, 28 4YDK3419B0336A

30, 32, 34, 36 4YDK4119B0468A

6 4YDK1500B0080A

8–20 4YDK2500B0240A

22–36 4YDK3100B0468A

Model

24 VRF-SVN34A-EN

Use Ta b le 16 to select the branch joints connected after the first branch, according to the total
capacity of all indoor units connected after the branch. (Refer to E in Figure 9, p. 20 (heat pump) or

Figure 10, p. 22 (heat recovery).)

Table 16. Branch joints connected after the first branch, according to total indoor unit capacity (E)

Total indoor unit

Branch joints after the first branch (E)

Y-j o int

High-pressure gas Y-joint (for heat recovery models)

capacity (MBH)

Less than 51 4YDK1509B0051A

51—135.9 4YDK2512B0138A

136—153.9 4YDK2812B0160A

154—239.9 4YDK2815B0240A

240—335.9 4YDK3419B0336A

336—460.9 4YDK4119B0468A

461 and over 4YDK4422B0999A

Less than 76 4YDK1500B0080A

76—239.9 4YDK2500B0240A

240—461 4YDK3100B0468A

Pipe Minimum Thickness and Temper Grade Based on Pipe Size

Ta b le 17 specifies thickness and temper grade based on pipe diameter.

Refrigerant Piping

Model

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 17. Refrigerant pipe minimum thickness and temper grade

Outer diameter

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)

1 (25.40) 0.039 (1.0)

1-1/8 (28.58) 0.043 (1.1)

1-1/4 (31.75) 0.043 (1.1)

1-3/8 (34.92) 0.048 (1.35)

1-1/2 (38.10) 0.053 (2.0)

1-5/8 (41.28) 0.056 (1.43)

1-3/4 (44.45) 0.063 (2.10)

2 (50.80) 0.079 (2.00)

2-1/8 (53.98) 0.083 (2.10)

Minimum thickness

in. (mm)

Temper grade

Annealed

(C1220T-O)

Drawn

(C1220T-1/2H or C1220T-H)

VRF-SVN34A-EN 25

Refrigerant Piping

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 Tab l e 1 8 ).

Table 18. Refrigerant pipe storage factors

Storage location

Outdoor

Indoor — Taping

Evacuating Refrigerant

The outdoor unit ships with the following amount of refrigerant. Evacuate the unit of all ship-with
refrigerant before installing refrigerant piping.

6 ton unit 8 ton unit 10 ton unit 12 ton unit

12.1 lbs 16.3 lbs 16.3 lbs 19.2 lbs

Installing Refrigerant Piping

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.

Storage

Longer than one

Shorter than one

Ship-with refrigerant amount by unit type

time

month

month Taping

WARNI NG

Sealing

Pipe

pinch

type

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

p. 27, and “Flared Pipe Connections” p. 28.)

2. Make sure that pipes are free of dirt, debris, and moisture, and do not leak. (Refer to “Leak

Testing Pipe Connections” p. 45).

26 VRF-SVN34A-EN

“Pipe Cutting” p. 27, “Nitrogen Flushing While Brazing”

3. Braze or use flared pipe connections to install piping. Refer to “Connecting Piping to the

Correct: 90º

Oblique

Rough

Burr

Flowmeter

Pressure regulator

Stop valve

Nitrogen

Nitrogen

Outdoor Unit” p. 29) and to “Connecting Branch Joints” p. 30.

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.

See examples of correctly and incorrectly cut pipes.

Nitrogen Flushing While Brazing

Refrigerant Piping

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 11. Nitrogen flushing while brazing refrigerant pipes

VRF-SVN34A-EN 27

Refrigerant Piping

Length of pipe extending above flare bar

Pipe

Flaring

bar

Yok e

Flaring bar

Copper pipe

Flare nut

Inclined

Damaged

surface

Uneven

thickness

Correct

Cracked

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.

R-410A clutch type

Clutch type Wing nut type

Conventional flare tool

0–0.020 in. 0.04–0.06 in. 0.06–0.08 in.

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.

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.

28 VRF-SVN34A-EN

Refrigerant Piping

R.016–.031

45°±2°

90°±2°

Left side

Right side

Front side

Pipe connections

Heat pump

Heat recovery

6. 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)

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

Connection

torque (ft·lb)

Connecting Piping to the Outdoor Unit

Important: Ensure that all pipe connections are accessible for servicing and maintenance.

Pipes can be connected to the outdoor unit at the front, bottom left, or bottom right of the unit, as
shown in the following figure:

Flare dimension

(in.)

Flare shape (in.)

VRF-SVN34A-EN 29

1. Remove the pipe cover from the outdoor unit.

2. Remove knock-outs from only the holes that you are going to use. Unused holes 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 outdoor unit using flared connections or by brazing. If brazing the pipe
connection, avoid damaging the service valve by wrapping it with a wet cloth as shown in

Figure 12, p. 30.

• Avoid damaging the temperature sensor.

• Ensure that the connected pipes do not touch each other or make contact with the unit.

4. After making electrical connections (see “Electrical Wiring” p. 37) and insulating the pipes (see

“Insulating Refrigerant Pipes” p. 48), replace the pipe cover and close the remaining gap.

Refrigerant Piping

Damp towel

Damp towel

Branch joint should be
connected at the same or lower
level as the refrigerant pipes
leaving the outdoor unit.

Unit straight section should
be  12 in. (300 mm)

Figure 12. Protecting the unit and temperature sensor while brazing the pipe connection

Connecting Branch Joints

Important: Ensure that all pipe connections are accessible for servicing and maintenance. For

optimal refrigerant distribution, use only factory joints.

Install outdoor joints as needed to connect multiple outdoor units to one another and Y-joints
connect the outdoor unit(s) to indoor units. See the branch joint installation manual (VRF-SVN41)
for details.

Note: Outdoor units can be installed in any order.

Table 19. Connecting outdoor units with branch joints

Correct installation Incorrect installation

Refrigerant pipes must be connected in parallel with the unit.

30 VRF-SVN34A-EN

Table 19. Connecting outdoor units with branch joints (continued)

8–12 in. (200–300 mm)

6.56 ft (2 m)

3.3 ft (1 m)

If the piping length between the outdoor
unit and the branch joint exceeds 6.56 ft
(2 m), install a vertical trap that is 8–12 in.
(200-300 mm) high.

Correct installation Incorrect installation

Branch joints between outdoor units must be installed horizontally.

Refrigerant Piping

VRF-SVN34A-EN 31

Refrigerant Piping

Outdoor unit

Indoor units

Y-j oi n t

Outdoor unit

Distribution header

Indoor units

Refrigerant Piping Installation Examples: Heat Pump

Figure 13. Single installation with Y-joint: Heat pump

Figure 14. Single installation with distribution header: Heat pump

32 VRF-SVN34A-EN

Refrigerant Piping

Outdoor unit

Indoor units

Y-j oi n t

Distribution header

Outdoor units

Y-j oin t

Indoor units

Outdoor units

Distribution header

Indoor units

Figure 15. Single installation with Y-joint and distribution header: Heat pump

Figure 16. Module installation with Y-joint: Heat pump

Figure 17. Module installation with distribution header: Heat pump

VRF-SVN34A-EN 33

Refrigerant Piping

Outdoor units

Distribution header

Indoor units

Y-j oin t

Figure 18. Module installation with Y-joint and distribution header: Heat pump

Table 20. Maximum allowable refrigerant piping length and height differences for heat pump installations

Piping length and height differences

(ft [m])

Y-joint only

656 ft (200 m) and
below

(a)

[722 ft (220 m) and
below]

3281 ft (1000 m) or
less

33 ft (10 m) or less

(b)

148 ft (45 m) or less b+c+d+e+f+g+p ≤ 148 ft (45 m), i ≤ 148 ft (45 m)

(148–295 ft (45–90 m)

4EEVEVA24SA000
4EEVEVA32SA000

4EEVXDA24K132A
4EEVXDA24K200A
4EEVXDA32K200A

4EEVXDA24K232A
4EEVXDA24K300A
4EEVXDA32K224A
4EEVXDA32K300A

Distribution header
only

Y-joint and distribution
header

Y-joint only

Distribution header
only

Y-joint and distribution
header

r ≤ 33 ft (10 m), s ≤ 33 ft (10 m), t ≤ 33 ft (10 m)

H1 ≤ 164/131 ft (50/40 m)

Required conditions must be satisfied (see Table 21,

p. 35)

Notes/Examples

a+b+c+d+e+f+g+p ≤656
[722] ft
(200 [220] m)

a+i ≤ 656 [722] ft
(200 [220] m)

a+b+h ≤ 656 [722] ft (200
[220] m
a+i+k ≤ 656 [722] ft (200
[220] m

a+b+c+d+e+f+g+p+h+i
≤3281 ft (1000 m)

For 1 indoor unit

For 2 indoor units

For 3 indoor units

Piping location

Actual length
[equivalent length]

Outdoor unit to

Maximum
allowable piping
length

Maximum
allowable piping
height difference

Maximum length
after branch joint

Electronic
expansion valve
(EEV) kit

(a) Equivalent length Y-joint: 1.64 ft (0.5 m); distribution header: 3.28 ft (1 m).
(b) If the indoor unit is at a higher level than outdoor unit, the allowable height difference is 131 ft (40 m). If the indoor unit is located at a lower level than

(c) Required for indoor units that do not have internal EEVs. Refer to the EEV kit installation guide (VRF-SVN43) for detailed information.

(c)

the outdoor unit, the allowable height difference is 361 ft (110 m). If the height difference exceeds 164 ft (50 m), request engineering support from Trane.

indoor unit

Between outdoor
units (module
installation)

Outdoor unit to
indoor unit

Indoor unit to indoor
unit

First branch joint to
farthest indoor unit

Actual piping length

Total piping length

piping length

Equivalent length r ≤ 43 ft (13 m), s ≤ 43 ft (13 m), t ≤ 43 ft (13 m)

361/131 ft (110/40 m)

164 ft (50 m) or less H2 ≤ 164 ft (50 m)

piping length

6.6 ft (2 m) or less

66 ft (20 m) or less

34 VRF-SVN34A-EN

Table 21. Required condition (note toTable 20, p. 34)

4MCUCUY4NCE000

4MCUCUY4NCE000

4MCUCUY4NCE000

4MCUCUY4NCE000

4MCUCUY4NCE000

4MCUCUY4NCE000

Condition Example

First branch joint to
farthest indoor unit

Total length of
extended pipe

Each Y-joint to
each indoor unit

Difference between [the distance of the outdoor unit to the farthest indoor unit] and the
nearest indoor unit and ≤148 ft (45 m), (a+b+c+d+e+g+p) ≤ 148 ft (45 m)

148 ft (45 m) ≤ b+c+d+e+f+g+p ≤ 295 ft (90 m): branch pipes (b,
c, d, e, f, g) size must be increased by 1 size

If the size of the pipe between the first branch joint and the outdoor
unit is not increased by 1 size,
a+(b+c+d+e+f+g)x2+h+i+k+l+m+n+p ≤ 3281 ft (1000 m)

If the size of the pipe between the first branch joint and the outdoor
unit is increased by 1 size, a+(b+c+d+e+f+g)x2+h+i+k+l+m+n+p
> 3281 ft (1000 m)

h, i, j, ... p ≤ 148 ft (45 m)

Refrigerant Piping Installation Examples: Heat Recovery

Figure 19. Installation with Y-joints: Heat recovery

Refrigerant Piping

Figure 20. Installation with MCU: Heat recovery

VRF-SVN34A-EN 35

Refrigerant Piping

Figure 21. Installation with MCU and Y-joint: Heat recovery

Table 22. Maximum allowable refrigerant piping length and height differences for heat recovery installations

Piping length and height

Piping location

Piping [equivalent

Outdoor unit to indoor

Maximum
allowable
piping
length

Maximum
allowable
piping
height
difference

Maximum
allowable
length after
branch joint

Electronic
expansion
valve (EEV)

(c)

kit

(a) Equivalent piping length—Y-joint: 1.64 ft (0.5 m); distribution header: 3.28 ft (1 m); MCU: 3.28 ft (1 m).
(b) If the indoor unit is at a higher level than outdoor unit, the allowable height difference is 131 ft (40 m). If the indoor unit is located at a lower level than

the outdoor unit, the allowable height difference is 361 ft (110 m). If the height difference exceeds 164 ft (50 m), request engineering support from Trane.

(c) Required for indoor units that do not have built-in EEVs. Refer to the EEV kit installation guide (VRF-SVN43) for detailed information.

unit

Between outdoor
units (module
installation)

Outdoor unit to indoor
unit

Indoor unit to indoor
unit

MCU to MCU 49 ft (15 m) H4 ≤ 49 ft (15 m)

First branch joint to
farthest indoor unit

Indoor unit

length]

Total piping length 3281 ft (1000 m)

Piping length 33 ft (10 m) r ≤ 33 ft (10 m), s ≤ 33 ft (10 m), t ≤ 33 ft (10 m)

Equivalent piping
length

Piping

Actual piping
length

differences

(a)

Notes/Examples

656 [722] ft
(200 [220] m)

43 ft (13 m) r ≤ 43 ft (13 m), s ≤ 43 ft (13 m), t ≤ 43 ft (13 m)

361 [131] ft 
(110 [40] m)

49 ft (15 m) H2 ≤ 49 ft (15 m)

MCU only

Y-joint and MCU a+g+m ≤ 656 [722] ft (200 [220] m)

MCU only a+b+c+d+e+f+g ≤ 3281 ft (1000 m)

Y-j oin t a n d M C U

H1 ≤ 361 [131] ft 

(b)

(110 [40] m)

a+b+c+d+e+f+g ≤ 256 [722] ft (200
[220] m)

a+b+c+d+e+f+g+p+h+i+j+k+m ≤ 3281 ft
(1000 m)

r

s

t

MCU only 148 ft (45 m)

148 ft (45 m)

6.6 ft (2 m) or less

66 ft (20 m) or
less

Y-joint and MCU g+m ≤ 148 ft (45 m)

4EEVEVA24SA000
4EEVEVA32SA000

4EEVXDA24K132A
4EEVXDA24K200A
4EEVXDA32K200A

4EEVXDA24K232A
4EEVXDA24K300A
4EEVXDA32K224A
4EEVXDA32K300A

For 1 indoor unit

For 2 indoor units

For 3 indoor units

36 VRF-SVN34A-EN

Electrical Wiring

Observe the following precautions when making electrical connections.

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.

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.

• 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 the following conditions: underground/ambient
temperature of 86ºF (30ºC), single multi-conductor cables.

Note: If conditions are different from these, consult an electrical installation expert and re-

• Use a power cable made out of incombustible material for the insulator (inner cover) and the
sheath (outer cover).

• All wiring must be protected from weather and damage.

• Do not use power cable that has exposed wire.

• Do not disconnect or change the factory wiring inside the unit.

• Provide strain relief for power and communication cables.

• Unbalanced power must be maintained within 10% 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.)

• Maintain a distance of 2 in. (50 mm) or more between power and communication cables to
prevent interference.

Electrical Wiring

WARNI NG

NOTICE

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.

VRF-SVN34A-EN 37

Electrical Wiring

Outdoor unit (main) Outdoor unit (sub)

Ground

Power cable

Power cable

Power cable

Communication

cable between

outdoor units

Communication between

outdoor units

circuit

breaker or

disconnect

Communication between

Ground

Ground

outdoor and indoor units

Communication between
outdoor and indoor units

Power cable

Indoor unit

Indoor unit

Indoor unit

Ground

Ground

Ground

Outdoor unit (sub)

circuit

breaker or

disconnect

circuit

breaker or

disconnect

circuit

breaker or

disconnect

Wired
remote
controller

Wired
remote
controller

Wired
remote
controller

See Figure 23,

p. 40 for details

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.

Figure 22. Typical system installation wiring

Detail of cable knock-outs

Communication cable

Power cable

Ground cable

38 VRF-SVN34A-EN

Power Wiring

Electrical Wiring

WARNI NG

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. Re f er to Table 24 and Table 25, p. 41 for power cable and circuit breaker specifications. Refer to

Table 23, p. 39 for conduit specifications.

2. Cut the power cable to an appropriate length and connect it to the terminals in the power supply
box with a solderless ring terminal (see Figure 23, p. 40).

Screw Tightening torque for terminal Power cable

M4 0.9–1.1 lbf/ft (1.2–1.5 N.m) Single-phase 208-230 V/460 V power cable

M8 4.1–5.4 lbf/ft (5.5–7.3 N.m) Three-phase 208-230 V/460 V power cable

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 23.

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.

Table 23. Cable conduit specifications

Name Temper grade Application conditions

Flexible PVC conduit PVC

Class 1 flexible conduit Galvanized steel sheet

Class 1 PVC-coated flexible
conduit

Galvanized steel sheet and
soft PVC compound

If conduit is installed indoors and not exposed to outside
elements (embedded in concrete)

If conduit is installed indoors but exposed to outside
elements

If conduit is installed outdoors and requires waterproofing

6. Pull the power cable through the designated knock-out at the bottom right of the outdoor unit

Figure 22, p. 38 for details).

(see

VRF-SVN34A-EN 39

Electrical Wiring

Figure 23. Power wiring connections

Power terminal location

Detail for connecting

two cables to one terminal

Solderless
ring terminal

Cable tie

Thick cable

Thin cable

40 VRF-SVN34A-EN

Electrical Wiring

Table 24. Circuit breaker and power cable specifications—Heat pump/heat recovery: 208–230 V

Module 1 Module 2 Module 3

Power

Units

Capacity

6 ton 4TV*072B300NB 60 208/230 14.3 4.0 28.0 35

8 ton 4TV*0096B300NB 60 208/230 12.5 12.5 3.0 3.0 37.8 50

10 ton 4TV*0120B300NB 60 208/230 14.8 14.8 3.0 3.0 43.0 50

12 ton 4TV*0144B300NB 60 208/230 17.4 17.4 3.0 3.0 52.6 70

14 ton 4TV*0168B300NB 60 208/230 14.3 4.0 28.0 35 12.5 12.5 3.0 3.0 37.8 50

16 ton 4TV*0192B300NB 60 208/230 14.3 4.0 28.0 35 14.8 14.8 3.0 3.0 43.0 50

18 ton 4TV*0216B300NB 60 208/230 14.3 4.0 28.0 35 17.4 17.4 3.0 3.0 52.6 70

20 ton 4TV*0240B300NB 60 208/230 14.8 14.8 3.0 3.0 43.0 50 14.8 14.8 3.0 3.0 43.0 50

22 ton 4TV*0264B300NB 60 208/230 14.8 14.8 3.0 3.0 43.0 50 17.4 17.4 3.0 3.0 52.6 70

24 ton 4TV*0288B300NB 60 208/230 17.4 17.4 3.0 3.0 52.6 70 17.4 17.4 3.0 3.0 52.6 70

26 ton 4TV*0312B300NB 60 208/230 14.3 4.0 28.0 35 12.5 12.5 3.0 3.0 37.8 50 17.4 17.4 3.0 3.0 52.6 70

28 ton 4TV*0336B300NB 60 208/230 14.3 4.0 28.0 35 14.8 14.8 3.0 3.0 43.0 50 17.4 17.4 3.0 3.0 52.6 70

30 ton 4TV*0360B300NB 60 208/230 14.3 4.0 28.0 35 17.4 17.4 3.0 3.0 52.6 70 17.4 17.4 3.0 3.0 52.6 70

32 ton 4TV*0384B300NB 60 208/230 14.8 14.8 3.0 3.0 43.0 50 14.8 14.8 3.0 3.0 43.0 50 17.4 17.4 3.0 3.0 52.6 70

34 ton 4TV*0408B300NB 60 208/230 14.8 14.8 3.0 3.0 43.0 50 17.4 17.4 3.0 3.0 52.6 70 17.4 17.4 3.0 3.0 52.6 70

36 ton 4TV*0432B300NB 60 208/230 17.4 17.4 3.0 3.0 52.6 70 17.4 17.4 3.0 3.0 52.6 70 17.4 17.4 3.0 3.0 52.6 70

Notes:

Model

Hz V

RLA FLA

Comp1Comp

2

Fan1 Fan2 MCA MOP

supply

RLA FLA

Comp1Comp2Fan1Fan

• RLA is based on AHRI 1230 cooling standard condition (indoor temperature: 80ºF (26.7ºC) DB/67ºF (19.46ºC) WB; outdoor temperature: 95ºF
(35ºC) DB.

• Voltage tolerance is ± 10%.

• Maximum allowable voltage between phases is 2%.

• Refer to module combination table for independent units information.

• Abbreviations: RLA: Rated load ampere; FLA: Full load ampere; MCA: Minimum circuit amperes ; MOP: Maximum overcurrent protective device
(amperes).

2

MCA MOP

Power

supply

RLA FLA

Comp1Comp2Fan1Fan

2

Power
supply

MCA MOP

Table 25. Circuit breaker and power cable specifications—Heat pump/heat recovery: 460 V

Module 1 Module 2 Module 3

Power

2

MCA MOP

supply

RLA FLA

Comp1Comp2Fan1Fan

Units

Capacity

6 ton 4TV*0072B400NB 60 460 9.5 2.0 16.4 20

8 ton 4TV*0096B400NB 60 460 11.5 1.5 1.5 19.0 25

10 ton 4TV*0120B400NB 60 460 14 1.5 1.5 21.7 30

12 ton 4TV*0144B400NB 60 460 10.1 10.1 1.5 1.5 26.4 40

14 ton 4TV*0168B400NB 60 460 9.5 2.0 16.4 35 11.5 1.5 1.5 19.0 25

16 ton 4TV*0192B400NB 60 460 9.5 2.0 16.4 20 14 1.5 1.5 21.7 30

18 ton 4TV*0216B400NB 60 460 9.5 2.0 16.4 20 10.1 10.1 1.5 1.5 26.4 40

20 ton 4TV*0240B400NB 60 460 14 1.5 1.5 21.7 30 14 1.5 1.5 21.7 30

22 ton 4TV*0264B400NB 60 460 14 1.5 1.5 21.7 30 10.1 10.1 1.5 1.5 26.4 40

24 ton 4TV*0288B400NB 60 460 10.1 10.1 1.5 1.5 26.4 40 10.1 10.1 1.5 1.5 26.4 40

26 ton 4TV*0312B400NB 60 460 9.5 2.0 16.4 20 11.5 1.5 1.5 19 25 10.1 10.1 1.5 1.5 26.4 40

28 ton 4TV*0336B400NB 60 460 9.5 2.0 16.4 20 14 1.5 1.5 21.7 30 10.1 10.1 1.5 1.5 26.4 40

30 ton 4TV*0360B400NB 60 460 9.5 2.0 16.4 20 10.1 10.1 1.5 1.5 26.4 40 10.1 10.1 1.5 1.5 26.4 40

32 ton 4TV*0384B400NB 60 460 14 1.5 1.5 21.7 30 14 1.5 1.5 21.7 30 10.1 10.1 1.5 1.5 26.4 40

34 ton 4TV*0408B400NB 60 460 14 1.5 1.5 21.7 30 10.1 10.1 1.5 1.5 26.4 40 10.1 10.1 1.5 1.5 26.4 40

36 ton 4TV*0432B400NB 60 460 10.1 10.1 1.5 1.5 26.4 40 10.1 10.1 1.5 1.5 26.4 40 10.1 10.1 1.5 1.5 26.4 40

Notes:

Model

Hz V

RLA FLA

Comp1Comp2Fan1Fan

• RLA is based on AHRI 1230 cooling standard condition (indoor temperature: 80ºF (26.7ºC) DB/67ºF (19.46ºC) WB; outdoor temperature: 95ºF
(35ºC) DB.

• Voltage tolerance is ± 10%.

• Maximum allowable voltage between phases is 2%.

• Refer to module combination table for independent units information.

• Abbreviations: RLA: Rated load ampere; FLA: Full load ampere; MCA: Minimum circuit amperes ; MOP: Maximum overcurrent protective device
(amperes).

2

MCA MOP

Power
supply

RLA FLA

Comp1Comp2Fan1Fan

2

Power
supply

MCA MOP

VRF-SVN34A-EN 41

Electrical Wiring

Grounding cable connection hole

Grounding cable knock-out

Power cable

Exclusive grounding terminal
(attached to a structure)

Grounding at the
electrical panel

Grounding

Important: Grounding must be done by a qualified electrician.

1. Select rated grounding cable by referring to the outdoor unit power cable specifications
(Table 24, p. 41 and Table 25, p. 41).

2. Connect the grounding cable to the grounding hole inside the power supply box and pull it
through the designated grounding knock-out (see Figure 24 for details).

Figure 24. Grounding cable connection location

Table 26. Grounding resistance requirements

Power condition at

installation site

Voltage to ground is ≤ 150 V

Voltage to ground is > 150 V

• 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 .

High or average humidity 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 .

Figure 25. Outdoor unit grounding examples

42 VRF-SVN34A-EN

Communications Wiring

F1 Communication

between outdoor
and indoor units

F2

OF1 Communication

between outdoor
units

OF2

R1

Higher-level
controls

R2

Terminal identification

Communication wiring

terminals

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.

Connect the communications wiring as shown in Figure 26.

•Refer to Ta bl e 23, p. 39 for conduit specifications.

• Refer to BAS-SVX51 for communication wiring specifications and best practices.

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 or,
if crossing is necessary, cross at 90 degrees.

• The communication cable between outdoor units and between indoor and outdoor units

has no polarity.

Electrical Wiring

WARNI NG

Figure 26. Communications board and wiring terminals

VRF-SVN34A-EN 43

Electrical Wiring

Communications clamping location

To provide strain relief, secure the communications cable with a clamp in the location shown in

Figure 27.

Figure 27. Communications cable clamping location

Pull the communications cable through the designated knock-out at the bottom right of the outdoor
unit (see Figure 22, p. 38 for details).

44 VRF-SVN34A-EN

Leak Testing Pipe Connections

Before leak testing pipe connections, read all safety precautions and notes.

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.

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.

Leak Testing Pipe Connections

WARNI NG

WARNI NG

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 over the specified
amount of nitrogen in a short time, pipes may be damaged.

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 for R-410A to prevent the inflow of foreign substances and reduce the risk of
high pressure.

• Do not remove the valve core of the charging port.

• Perform the leak test with the service valve of the outdoor unit closed.

VRF-SVN34A-EN 45

Leak Testing Pipe Connections

Low-pressure side

Nitrogen

Heat pump

Heat recovery

Nitrogen

High-pressure side

Filling ports

Gas pipe

Liquid pipe

Service valves

High-pressure gas pipe

Filling ports

Service valves

Gas pipe

Liquid pipe

Low-

pressure

side

High­pressure
side

Use the following procedure for leak testing pipe connections. Refer to Figure 28.

Figure 28. Leak testing pipe connections

1. Apply pressure to the liquid side pipe and gas side pipe (when installing outdoor units in
module) with nitrogen gas at 4.1 MPa (594.6 psi).

2. Keep it for minimum 24 hours to check if pressure drops. After applying nitrogen gas, check for
a change in pressure, using a pressure regulator.

3. If the pressure drops, check for gas leakage. If the pressure is changed, apply soap water to
check for leakage and check the pressure of the nitrogen gas again.

4. Maintain 145 psi (1.0 MPa) of the pressure before performing vacuum drying and check for
further gas leakage. After checking the first gas leakage, maintain 145 psi (1.0 MPa) to check for
further gas leakage.

46 VRF-SVN34A-EN

Vacuum Procedure for the System

Perform vacuum drying of the
liquid side pipe and gas side
pipe (when installing outdoor
units in module) using a vacuum
pump.

Make sure that check valve is installed to prevent pump oil from
flowing into the pipe.

While the vacuum gauge
pressure is less than 29.7 inWC,
perform the vacuum
drying for more than 1 hour and
close the valve.

Vacuum pressure must be checked with the vacuum gauge.

After vacuum pump stops,
check whether the pressure is
maintained within 29. 7 inWC

for an hour.

Charge additional refrigerant to the

pipe

No

Perform vacuum drying again

Check for gas leakage

Vacuum destruction

Apply nitrogen gas to the pipe at

pressure of 7.25 psi (0.05 MPa).

Yes

No

Over 29.7 inWC

Pressure increase

Yes

After performing a leak test, follow this vacuum procedure:

• Use tools for R-410A to prevent the inflow of foreign substances and resist against internal
pressure.

• Use a vacuum pump that allows vacuuming under 29.7 inH2O.

• Use a vacuum pump with a check valve to prevent pump oil from flowing backward while the
vacuum pump is stopped.

• Completely close the liquid-gas side service valve of the outdoor unit.

Connect the manifold gauge to
the liquid side pipe and gas side
pipe (when installing outdoor
units in module).

When installing outdoor units in module, connect the manifold gauge
to liquid side pipe and the gas side pipe.

Vacuum Procedure for the System

VRF-SVN34A-EN 47

Insulating Refrigerant Pipes

Service valves

Insulating Refrigerant Pipes

After determining that there are no leaks in the refrigerant pipes, insulate them as described:

1. U se Table 27 to select the insulation thickness according to pipe size and humidity conditions.

Table 27. Pipe insulation selector

Insulation Type

Standard conditions

86°F (30°C), 85%

Pipe size

Pipe

Liquid pipe

Gas pipe

(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).

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)

3/8 (9.52) – 1 (25.40)

(b)

1-1/8 (28.58) – 1-3/4 (44.45) 1-1/4 (32)

2 (50.80) 1.0 (25) 1-1/2 (38)

in. (mm)

3/4 (19)

EPDM or NBR

(in. (mm)

High humidity conditions

86°F (30°C), over 85%

1.0 (25)

(a)

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.

Note: For details on insulating branch joints, refer to the branch joint installation manual (VRF-

SVN41).

• Do not wrap the gas and liquid refrigerant pipes together.

• Overlap insulation to avoid gaps.

• Avoid compressing the insulation as much as possible.

48 VRF-SVN34A-EN

• Be sure there are no cracks or deformities in the insulation at bends in pipes.

Clamp

Insulation

Gas side pipe

Liquid side pipe

• If necessary double the insulation to prevent condensation from forming in warm or humid

areas.

3. Clamp insulation tightly to the pipes.

4. Cut off excess insulation.

Refrigerant Charging

Refrigerant Charging

WARNI NG

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.

After vacuuming and leak testing the system, charge the system with refrigerant as explained in
the following procedure:

1. Calculate the correct amount of refrigerant using Table 28, p. 50 through Table 31, p. 51.

2. Open the liquid and gas service valves and 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.

VRF-SVN34A-EN 49

Refrigerant Charging

Calculating Refrigerant

Table 28. Initial refrigerant quantity for each outdoor unit model

Model

Initial refrigerant
quantity: lb (kg)

Note: Add the initial refrigerant quantity shown in this table to the refrigerant calculated in Tab l e 2 9 through Table 31, p. 51.

4TV*0072***** 4TV*096***** 4TV*120***** 4TV*144*****

12.1 (5.5) 16.3 (7.4) 16.3 (7.4) 19.2 (8.7)

Table 29. Refrigerant quantity according to liquid pipe diameter and length (a)

Diameter of liquid pipe: 
in. (mm)

Additional refrigerant
quantity: lb/ft (kg/m)

Note: For an indoor unit with a factory-installed EEV, the quantity of refrigerant in addition to the quantity based on the unit capacity (Ta b l e 2 8 ) is 0.0067 lb/ft

regardless of the pipe size.

1/4 (6.35) 3/8 (9.52) 1/2 (12.7) 5/8 (15.88) 3/4 (19.05) 7/8 (22.23) 1 (25.4)

0.013 (0.02) 0.040 (0.06) 0.084 (0.125) 0.121 (0.18) 0.181 (0.27) 0.235 (0.35) 0.356 (0.53)

Table 30. Refrigerant quantity for each indoor unit (b)

Capacity (MBH)

7. 5 9 9.5 12 18 20 24 30 36 48 76.8 96

Model

1-way cassette
(4TVE00**B100NB)

Mini 4-way cassette
(4TVB00**B100NB)

4-way cassette
(4TVC00**B100NB)

Slim duct
(4TVL00**B100NB)

MSP duct
(4TVD00**B100NB)

HSP duct
(4TVA00**B100NB)

High-wall
(4TVW00**B100NB)

Convertible
ceiling/floor
(4TVX00**B100NB)

Notes:

• Additional refrigerant charging of MCU is 1.1 lb (0.5 kg) for every MCU kit.

• For an indoor unit with an AHU kit, add 0.04 lb (0.018 kg) of refrigerant for 1 MBH capacity of the AHU kit.

0.55

(0.25)

0.99

(0.45)

0.53

(0.24)

0.53

(0.24)

0.55

(0.25)

0.82

(0.37)

0.53

(0.24)

0.53

(0.24)

0.55

(0.25)

0.82

(0.37)

0.53

(0.24)

0.53

(0.24)

Refrigerant quantity: lb (kg)

0.82

(0.37)

0.99

(0.45)

0.99

(0.45)

0.62

(0.28)

0.79

(0.36)

0.86

(0.39)

0.82

(0.37)

0.79

(0.36)

0.99

(0.45)

0.99

(0.45)

0.62

(0.28)

0.79

(0.36)

0.86

(0.39)

1.52

(0.69)

0.93

(0.42)

1.19

(0.54)

1.52

(0.69)

0.93

(0.42)

1.19

(0.54)

1.50

(0.68)

1.52

(0.69)

1.37

(0.62)

1.50

(0.68)

1.50

(0.68)

2.60

(1.18)

2.60

(1.18)

50 VRF-SVN34A-EN

Refrigerant Charging

Note: For heat recovery systems, add 1.1 lb (0.5 kg)

additional refrigerant for each MCU kit.

Table 31. Calculation example for refrigerant amount additional to basic unit amount

Liquid pipe (a)

diameter

in. (mm)

Refrigerant amount

(lb/ft)

Pipe length (ft)

from Table 29, p. 50)

(1) (2) (1) x (2)  (1) x (2)

Additional

refrigerant

amount (lb)

Total additional
refrigerant (lb)

1/4 (6.35) 114.8 0.013 1.49

12.193/8 (9.52) 164.0 0.040 6.56

1/2 (12.70) 49.2 0.084 4.13

Refrigerant amount

Indoor unit (b)

model

4-way cassette
(4TVC00**B100NB)

Slim duct
(4TVL00**B100NB)

Slim duct
(4TVL00**B100NB)

1-way cassette
(4TVE00**B100NB)

Notes:

• The total amount of refrigerant in the system must not exceed 220 lb (100 kg). If the refrigerant weight exceeds this amount,
separate the modules into smaller modules (or units) so that the maximum weight is not exceeded. For example, for 4TV*144*****,
the basic amount of refrigerant is 19.1 lb (8.7 kg). Therefore, the total amount of additional refrigerant (a) + (b) should not exceed

200.9 lb (91.3 kg

• For each MCU kit, additional refrigerant charging is 1.1 lb (0.5 kg).

• For an indoor unit with an AHU kit, add 0.04 lb (0.018 kg) of refrigerant for 1 MBH capacity of the AHU kit.

• When calculating refrigerant for heat recovery apps, make sure you add

Number of units

(1) (2) (1) x (2)  (1) x (2)

4 0.99 3.96

2 0.99 1.98

1 0.53 0.53

1 0.55 0.55

(lb/each)

from Table 30, p. 50)

Additional

refrigerant

amount (lb)

Total additional
refrigerant (lb)

7.02

Example:

12 MBH

1/4 (6.35), 16.4 (5)

24 MBH

1/4 (6.35), 32.8 (10)

24 MBH

1/4 (6.35), 49.2 (15)

3/8 (9.52), 32.8 (10)

3/8 (9.52), 32.8 (10)

18 MBH

18 MBH

18 MBH

144 MBH

1/2 (12.7), 16.4 (5)

1/2 (12.7), 16.4 (5)

1/2 (12.7), 16.4 (5)

3/8 (9.52), 32.8 (10)

3/8 (9.52), 32.8 (10)

3/8 (9.52), 32.8 (10)

12 MBH

18 MBH

Units:
Pipe diameter: in. (mm)
Pipe length: f (m)

1/4 (6.35), 16.4 (5)

VRF-SVN34A-EN 51

Refrigerant Charging

Single installation

Module installation

Charging Refrigerant

To charge refrigerant:

1. With the unit still in a vacuum, open the manifold gauge valve connected to the liquid side
service valve and add the liquid refrigerant.

2. If you are unable to add all of the refrigerant needed into the liquid side, close the liquid side,
remove the liquid manifold hose, then open the gas valve.

3. Press K2 once to initiate refrigerant charging in cooling mode.

4. To determine if the amount of refrigerant added is correct, use the automatic refrigerant
function (see

Figure 29. Charging additional refrigerant

Figure , p. 64).

5. After charging the refrigerant, close both caps as shown in the figure below.

• Tightening torque for refrigerant port cap: 7.4–8.9 lbf-ft (10–12 N-m)

• Tightening torque for control cap: 14.8–18.4 lbf-ft)

• Opening/closing torque for the valve (> 3/4 in. [19 mm]): 7.4 lbf-ft (10 N-m)

52 VRF-SVN34A-EN

Control System

The control board (Fig 28) contains, a 4-digit display, a DIP switch, three rotary switches, and four
buttons, as shown in Figure 30. Their functions are explained in this section.

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 30. Control board

Control System

WARNI NG

4-digit display

Buttons

SW53

SW53

SW51 SW52

MCU

TEN

ONE

TENS
DIGIT

ONES
DIGIT

SW57

MCU

VRF-SVN34A-EN 53

Control System

SW53

SW57

SW51 SW52

TENS
DIGIT

ONES
DIGIT

MCU

System Monitoring

The 4-digit display indicates system power and communication status.

Table 32. 4-digit display

Event Digit 1 Digit 2 Digit 3 Digit 4

Power up
Establishing

communication between
outdoor and indoor units

Transmit/receive 
(normal operation)

(a) 4-digit display example showing power-up is shown in Figure 30.
(b) Mode change unit.

(a)

“8”“8”“8”“8”

“A” “d” Number of connected indoor units

Indoor unit: “A”

(b)

MCU

: “C”

Indoor unit: “0”

MCU: “1”

System Configuration: DIP and Rotary Switches

The outdoor unit control board contains one DIP switch and three rotary switches (Figure 31). Use
them to configure the system as described in Table 33.

Figure 31. Switches on outdoor unit control board

Unit address (decimal number)

Table 33. System configuration using control board switches

Switch

(a) For illustration of switches, refer to Figure 31.
(b) For module installations, one outdoor unit needs to be designated as the main unit. The remaining outdoor units must be designated as sub-units.

54 VRF-SVN34A-EN

(a)

SW51/

SW52

SW57 Use to set total number of connected MCUs

SW53

Use to set total number of installed indoor units

K5 Off Not used. Default: Off

K6

K7 On

K8 On

K7 On

K8 Off

K7 Off

K8 On
K7 Off
K8 Off

On

Off Disables maximum capacity restriction for cooling operation.

Function description and notes

Set at main outdoor unit only.

Note: For example, if 12 indoor units are installed, SW51: 1, SW52: 2.

Set at main outdoor unit only.

Note: For example, if 3 MCUs are installed, SW57: “3”. 

If 10 MCUs are installed, SW57: “A”.

Enables maximum capacity restriction for cooling operation.
Use to re

capacity.

Use to set outdoor unit address: No.

Use to set outdoor unit address: No.

Use to set outdoor unit address: No.

Not used

strict excessive capacity increase when operating indoor

1 (main unit)

2 (sub-unit 1)

3 (sub-unit 2)

(b)

units

with small

Control System

Buttons

4-digit display

Digits 1 and 2 change to the number representing the
selected option.

Digits 3 and 4 change to the number representing the
selected value.

The control board has four buttons, K1–K4, and a 4-digit display for configuring system options.

Figure 32. Buttons and 4-digit display on the outdoor unit control board

To set options:

1. When the unit is not operating, press and hold K2 (5 seconds) to enter the option setting mode.
The 4-digit display will appear as shown. (If compressor cut-off is enabled, digit 4 will be “1”
or “2”.)

2. To select a different option, press K1 repeatedly until the number representing the selected
option appears for digits 1 and 2. (See the “Digit 1” and “Digit 2” columns in Tab le 34, p. 56 for
the list of option numbers.) For example, choose “01” on the main outdoor unit to select the
cooling capacity correction option.

3. To change the value for the option selected in Step 2, press K2 repeatedly for 1 second until the
number representing the selected value appears for digits 3 and 4. (See the “Digit 3” and “Digit
4” columns in

Ta bl e 34, p. 56 for the list of values.)

For example, if you select “01” for digits 1 and 2, and “04” for digits 3 and 4, the cooling capacity
correction selection is 50–53.6°F (10–12°C).

4. To save the value you have selected in Step 3, press and hold the K2 for 5 seconds. The 4-digit
display will blink as it enters tracking mode. The selected value will be saved when the display
returns to normal.

Note: To the previous value instead of saving the selection, press and hold K1 (5 seconds). To

restore the factory default, press and hold K4 while in the option setting mode.

VRF-SVN34A-EN 55

Control System

Table 34. Options and corresponding settings

Option

Emergency
operation for
compressor
malfunction

Cooling capacity
correction

Heating capacity
correction

Current restriction
rate

Oil collecting
interval

Temperature for
triggering
operation

Outdoor unit
speed correction

defrost

fan

Outdoor

Digit 1Digit 2Digit 3Digit

unit

Single 0 0

Main 0 1

Main 0 2

Single 0 3

Main 0 4

Main

Single 06

05

4

00

01

02

00

0 1 41-44.6 (5-7)

0 2 48.2-51.8 (9-11)

0 3 50-53.6 (10-12)

0 4 51.8-55.6 (11-13 )

0 5 53.6-57.2 (12-14)

0 6 55.4-59 (13-15)

00

0 1 362.6 (2.5)

0 2 377.1 (2.6)

0 3 391.6 (2.7)

0 4 406.1 (2.8)

0 5 420.6 (2.9)

0 6 449.6 (3.1)

0 7 464.1 (3.2)

0 8 478.6 (3.3)

00

0195%

0290%

0385%

0480%

0575%

0670%

0765%

0860%

0 9 55%

1050%

11

00

01

00

01

00

0

Disabled (factory

Compressor

Compressor

44.6-48.2 (7-9): f ac tory

435.1 (3.0): factory

100%: factor y

No

restriction

Fac tory

Shortens interval

Disable snow prevention function
(factory

Enable when installation is in a
humid area such as near a river
or lake

Fac tory

Increase fan

1

value

Value Comments

1: malfunction state

2: malfunction state

default

default

default)

default

speed to maximum

default)

default

by 1/2

default

E560 will occur if all compressors are set to
malfunction state.

Targeted evaporating tempera
When low temperature value
discharged

Targeted high pressure
When

temperature

Enabling this setting may decrease cooling and
heating performance.

air

temperature

low pressure value

of the

indoor unit

ture: °F(°

is

set, indoor unit

will decrea

: psi (MPa).

is set,

discharged

will decrease

C).

se.

air

.

56 VRF-SVN34A-EN

Table 34. Options and corresponding settings (continued)

Control System

Outdoor

Option

Night-time
mode

High-head
setting

Long piping
condition

Energy saving
mode

Rotation defrost

Expand operational
temperature
for
operation

Channel address Main 1 3

Snow
accumulation
prevention control

(a) Enabling this setting is unnecessary if high-head condition is set.
(b) Heat recovery only.

cooling

silent

condition

(a)

range

(b)

unit

Main

Main 0 8

Main 0 9

Main 1 0

(b)

Main 1 1

Main 1 2

Main 1 4

Digit 1Digit 2Digit 3Digit

4

00

07

01Level 1

02Level 2

03Level 3

00

01

02

03

0 0 Disabled (factory default) When the equivalent length of the farthest

01Level 1

02Level 2

0 0 Disabled (factory default) If enabled, energy saving mode triggers

01Enabled

0 0 Disabled (factory default) If enabled, continuous heating operation is

01Enabled

0 0 Disabled (factory default) If enabled, continuous cooling operation is

01Enabled

AU

0–15

0 0 Enabled (factory default)

01Disabled

Value Comments

Disabled (factory

Disabled (factory

Case 1: height difference type 1
(indoor unit is lower than
outdoor unit)

Case 2: height difference type 1
(indoor unit is lower than
outdoor unit)

Height difference type 2
(outdoor unit is lower than
indoor unit)

Automatic setting (factory
default)

Manual setting for channel: 
0–15

default)

default)

When the outdoor unit
80 m)

above the indoor

When the outdoor unit

(

80 m) above the indoor

When the indoor unit
(30 m)

above the outdoor

indoor unit from the outdoor unit is between

328.08–557.74 (100–170 m).

When equivalent length
from the outdoor unit

when the room temperature reaches
setpoint while operating in heating mode.

possible but heating performance will
decrease during rotation defrost operation.

possible even in low temperature condition
down to 5°F (-15°C), but MCU noise will
increase.

Used for centralized control.

If enabled, the fan may rotate when the unit
is not operating.

is

131.23–262.47

unit.

is

more than 262.47 ft.

unit.

is more than

of

is

over 557.74 ft (

unit.

farthest

98.43 ft

indoor

ft (

40–

unit

170 m ).

VRF-SVN34A-EN 57

Control System

System Configuration: Buttons K1–K4

Buttons K1 and K2 are used to initiate system operations. The 4-digit display responds as shown
in the last column of the following tables.

Table 35. Button K1

Number of times button

K1 is pressed

1 (hold for 5 seconds) Test operation

1

2

3

4

5

6

7

8

9

10

11

12

Refrigerant

Te s t o pe r a t i o n

Pump out

Pump out

Pump out

Pump out

Vacuuming (Outdoor unit address

Vacuuming (Outdoor unit address

Vacuuming (Outdoor unit address

Vacuuming (Outdoor unit address

Vac uum ing

End

charging in heating mode

in heating

in heating

in heating

in heating

(All)

operation

Operation 4-digit display

K - K- Blank - Blank

K - 1 - Blank - Blank

in heating mode

mode (Outdoor unit address

mode (Outdoor unit address

mode (Outdoor unit address

mode (Outdoor unit address

1)

2)

3)

4)

1)

2)

3)

4)

K - 2 - Blank - Blank

K - 3 - Blank - 1

K - 3 - Blank - 2

K - 3 - Blank - 3

K - 3 - Blank - 4

K - 4 - Blank - 1

K - 4 - Blank - 2

K - 4 - Blank - 3

K - 4- Blank - 4

K - 4- Blank - A

—

Table 36. Button K2

Number of times

button K2 is

pressed

1

2

3

4

5

6

7Forced defrost

8

9 Inverter check compressor 1

10 Inverter check for compressor 2

11 Inverter check for fan 1

12 Inverter check for fan 2

13 End operation —

(a) Discharge mode may not operate normally if an error code occurs. If an E464 or E364 occurs, do not use the discharge

mode because the power element may be damaged.

(b) If button K2 is pressed the specified number of times and the inverter check is not successful, an error code will appear

on the 4-digit display.

Refrigerant

Te s t o p e ra t i on

Pump down

Pipe inspection (heat pump: test

Checking the amount

Discharge

Forced

oil collection

Operation 4-digit display

charging in

in

all

mode

cooling

units

(a)

cooling

mode

in

cooling

mode

of refrigerant

(b)

(b)

(b)

mode

operation)

(b)

K - 5 - Blank - Blank

K - 6 - Blank - Blank

K - 7 - Blank - Blank

K - 8 - Blank - Blank

K - 9 - X - X

(last digits may differ depending on status)

K - A - Blank - Blank

K - B - Blank - Blank

K - C - Blank - Blank

K - D - Blank - Blank

K - E - Blank - Blank

K - F - Blank - Blank

K - G - Blank - Blank

Table 37. Button K3

Number of

times button K3

is pressed

1

Initialize (reset)

Operation 4-digit display

operation

Same

as

power up: “8888”

58 VRF-SVN34A-EN

Table 38. Button K4

Control System

Number of

times button

K4 is

pressed

4TV*0072***** (6 ton)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22 ESC EEV step M

23 HR EEV step N

24

25

26

27 Suction 2 temperature (HR) R

28 Master indoor unit address S

4TV*0096***** (8 ton) Off, 1, 0

4TV*0120***** (10 ton) Off, 1, 2

4TV*0144***** (12 ton) Off, 1, 4

Command frequency
compressor

Command frequency
compressor

High pressure

Low pressure

Discharge temperature

Discharge temperature

IPM temperature

IPM temperature

CT sensor value

CT sensor value

Suction

COND Out

Temperature

TOP temperature

TOP temperature

Outdoor

ESC inlet

ESC outlet

Main EEV1

Main EEV2

Fan step (SSR

Current frequency

Current frequency

Operation

1

2

temperature C

temperature D

temperature H

temperature I

temperature J

step K

step L

of

of

of COMP1 6 188.6°F (87°C)→0, 8, 7

of COMP2 7 188.6°F (87°C)

of COMP1 8 188.6°F (87 ?)

of COMP2 9 188.6°F (87 ?) →0, 8, 7

of COMP1 A 2 A →0, 2, 0

of COMP2 B 2 A

of

liquid

pipe E

of COMP1 F

of COMP2 G

or BLDC) O

of COMP1 P

of COMP2 Q

the

the

4-digit display

Digit 1 Digits 2, 3, 4

Off, 0, 8

1

2 120 Hz → 1, 2, 0

3 120 Hz → 1, 2, 0

4 220.46 psi (1.52 MPa) →1, 5, 2



→



→

0, 2, 0



→



→

→2, 0, 0

→2, 0, 0

→3, 0,

→3, 0,

→0, 1,

→ -, 4, 2

→

0, 8, 7

0, 8, 7

-, 4, 2

-, 4, 2

5 62.37 psi (0.43 MPa)

→

-43.6°F

(-42°C) →-, 4, 2

-43.6°F

(-42°C) →-, 4, 2

-43.6°F

(-42°C)

-43.6°F

(-42°C)→-, 4, 2

-43.6°F

(-42°C)→-, 4, 2

-43.6°F

(-42°C)

-43.6°F

(-42°C)→-, 4, 2

-43.6°F

-43.6°F

If master indoor unit is not selected → Blank, N, D

If indoor unit No. 1 is selected as master indoor unit

(-42°C)→ -, 4, 2

2

000

steps

2

000

steps

300 steps

300 steps

steps

13

120

Hz →1,2,0

120

Hz →1,2,0

(-42°C)

0, 0, 1

0, 4, 3

0

0

3

→

VRF-SVN34A-EN 59

Control System

Table 39. Button K4 (pressed and held for 3 seconds)

Number of times

K4 is pressed and

held 3 seconds

1

2

3

4

5

6

7

(a)

8

(a)

9

(a) Toggles between indoor unit and MCU.

Software version

Main circuit board

Hub circuit board

Inverter

1 version “INV1” “1412”

Inverter

2 version “INV2” “1412”

Fan 1 version

Fan 2 version

EEP

version

Automatically assigned
unit addresses

Manually assigned unit
addresses

version

version

4-digit display: toggles between (1) and (2)

Device

(1)

“MAIN” “1412”

“HUB” “1412”

“FAN1” “1412”

“FAN2” “1412”

“EEP” “1412”

Version (2): examples

Digit 1 Digit 2 Digit 3, 4

Address (example)

“AUTO”

“MAIN”

Indoor unit: “A”

MCU: “C”

Indoor unit: “A”

MCU: “C”

Indoor unit: “0”

MCU: “1”

Indoor unit: “0”

MCU: “1”

“07”

“15”

60 VRF-SVN34A-EN

Pre-Start Checks

After installation and before the test operation is conducted, perform the following pre-start checks:

Avoid Damage to the Communication Circuit!

Do not measure the communication terminal with an insulation tester. Doing so will damage
the communication circuit.

1. Ensure that the power and communication cables of the indoor and outdoor units are properly
connected.

2. Before supplying power, use a 500 Vdc (4TV*****B400NB) or 600 Vdc (4TV*****B300NB)
insulation resistance tester to measure the power terminal (3 phase: R, S, T) and the outdoor
unit grounding. The resistance measurement should be over 30 M.

3. Before supplying the power, use a voltmeter and phase tester to check the voltage and the phase
between wires (R-S, S-T, T-R): 460 V (TV*****B400NB) or 230 V (4TV*****B300NB).

Pre-Start Checks

NOTICE

4. Ensure that the indoor units are connected.

5. The protection system cuts power to the PCB for overvoltage when N phase is cross-wired to
the R, S, and T terminals. Check the power connection from N phase if the PCB is not turned on.

6. Check for a short-circuit between the communication terminal and ground.

7. Ensure that the pre-start checklist (Tab l e 40) has been completed.

Table 40. Pre-start checklist

• Have you checked the external surface and the inside of the outdoor unit?

Outdoor unit

Installation

Indoor unit

Refrigerant pipe

• Is there any possibility of short circuit due to the heat of an outdoor unit?

• Is the place well-ventilated and meets recommended requirements for
clearances and service?

• Is the outdoor unit installed securely to withstand the external force?

• 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?

• 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?

• Are the branch joints properly installed?

• 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.)

VRF-SVN34A-EN 61

Test Operation

50 (122)

40 (104)

30 (86)

20 (68)

10 (50)

0 (32)

-10 (14)

-20 (-4)
5 (41) 10 (50) 15 (59) 20 (68) 25 (77) 30 (86) 35 (95) 40 (104) 45 (113)

Cooling

Heating

Outdoor temperature: °C (°F)

Indoor temperature: °C (°F)

Notes:

• During the test operation, cooling/heating modes are selected automatically.

• In the temperature range marked with hashed lines, system protection control may trigger during operation. (If this
occurs, the test operation may be difficult to judge correctly.

• When the temperature is outside of the guaranteed range, test operation accuracy of may decrease to the borderline
area shown in the graph.

Table 40. Pre-start checklist

Drain pipe

Electrical

Setting address

Option • Ensure that the isolation frame is correctly installed.

Test Operation

Perform the test operation after all pre-start checks have been completed (See “Pre-Start Checks”

p. 61) and within the following temperature conditions:

• 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?

• 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 shielded cable used for the communication cable?

• Is the wire length within the recommended limit?

• Is the wiring route correct?

• Are the address of the indoor and outdoor units properly set?

• Are the address of the indoor and outdoor units properly set (when using
multiple remote controllers)?

62 VRF-SVN34A-EN

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.

WARNI NG

Test Operation

CAUTION

Risk of Burn or Frostbit!

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 right after the operation to avoid
getting burned our frostbit.

NOTICE

Avoid Unit Damage!

Wait at least 5 minutes before turning off the main power after the inspection test is finished. If
you do not, water leakage or other problems may occur.

Wait at least 6 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. Provide power to the outdoor unit at least 6 hours before operating it.

Notes: When power is supplied to the outdoor unit, it will check for and verify communications

with the indoor units.

2. Ensure that the front of the outdoor unit is closed.

3. Press and hold button K1 for 5 seconds to run the test operation (see Ta b le 35, p. 58.)

• While the test operation is running and after the communication check, UP (UnPrepared)

appears on the digital display and the compressor is restricted from operating. The display
will clear automatically when the test operation is completed.

• The test operation may proceed from 20 minutes to maximum 2 hours depending on the

operating status.

• During the test operation, noise may occur due to valve inspection. (Examine the unit if

abnormal noise continually occurs.)

4. If error codes E503, E505, or E506 occur during the test operation, refer to “Error code E503”

p. 65 or “Error code E505 and E506” p. 65. If any other errors occur or if an inspection is needed,

refer to the service manual.

5. When the test operation ends, use VRF Enterprise Management Software or VRF Auto­Commissioning Tool to issue a test results report. If any items in the report are marked with an
“inspection required” sign, refer to the service manual for information on correcting the items
and run the test operation again.

6. Ensure the following:

• The system has the correct refrigerant amount (see “Automatic refrigerant detection

operation” p. 64) after the unit has been operating in cooling mode for at least 30 minutes

• Cooling/heating operation runs normally.

• Air flow direction and fan speed of indoor units runs normally.

• There are no abnormal operating noises from indoor or outdoor units.

• During cooling operation, the indoor units drain properly.

7. Use VRF Enterprise Management Software to check operating status details.

8. Explain to the user how to use the indoor unit, and leave indoor unit manual with the user for
their reference.

VRF-SVN34A-EN 63

Automatic refrigerant detection operation

Start

Press the K2 button 5 times

Detect amount of refrigerant

Judge the amount of

refrigerant

Judge the amount of

refrigerant

Satisfy the temperature

condition

Satisfy the temperature

condition

Detect amount of refrigerant

Input VRF Technicial Uti lities signal

End

Normal

Judgment

not available

(Normal) (Excessive) (Insufficient) (Judgment not

available)

Excessive
amount of

refrigerant

Insufficient

amount of
refrigerant

Insufficient

degree of

supercooling

Input VRF Auto-Commissioning
Tool signal

Automatic refrigerant detection operation

Use the refrigerant amount detection operation after operating the product in cooling mode for at
least 30 minutes.

• If the unit operation cycle is unstable, the refrigerant detection operation may end before it is
completed.

• The refrigerant detection operation result may be inaccurate if

– If the refrigerant detection operation is run after the unit has been shut down for a long

period of time.

– If the unit installation environment causes the unit to trigger protection controls.

After the refrigerant detection operation is complete, take the following actions:

• If the amount of refrigerant is excessive, discharge 5% of the detected amount and restart the
refrigerant amount detection operation.

• If the amount of refrigerant is insufficient, add 5% of the detected amount and restart the
refrigerant amount detection operation.

• If the degree of supercooling is insufficient, add 10% of the detected amount of refrigerant and
restart the refrigerant amount detection operation.

• If the result is unavailable, check that the refrigerant detection operation was executed within

64 VRF-SVN34A-EN

the guaranteed temperature range. Perform a test operation to determine if there are any other
problems with the system.

Troubleshooting

Is the service valve
of the outdoor unit
opened?

Open the service valve of
the outdoor unit.

Is the 4-way valve and
main EEV operating
normally?

Check the 4-way valve
and Main EEV.

Check for leakage on the
system. Perform vacuuming /
charge refrigerant.

Is the quantity of
refrigerant appropriate?

1. Run the test operation for more than 30 minutes.

2. Run Fan mode for more than 10 minutes.

3. Restart the test operation.

No

No

No

Ye s

Ye s

Ye s

Enable vacuum mode on all outdoor units.

Is the service valve of the outdoor unit opened?

Open the service value of the
outdoor unit.

Does the input sensor value of the installed
outdoor unit satisfy:
Max/min value difference of low pressure >2
Max/min value difference of high pressure >2

Reset the outdoor unit.

Disable vacuum mode on all outdoor units.

Run test operation.

End

Analyze cycle data. Check the input
sensor; replace if defective.

No

No

Ye s

Ye s

Error code E503

Troubleshooting

Error code E505 and E506

VRF-SVN34A-EN 65

Warranty For Trane Advantage™ VRF Systems and Related Accessories

Warranty For Trane Advantage™ VRF Systems and
Related Accessories

Products Covered. This warranty is extended by Trane, and applies to all Trane Advantage™ VRF

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 12 months from the initial start-up or 18 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 the following conditions are met, the warrantor extends this basic warranty period to five (5)
years from date of start-up:

• The system is designed using an approved application tool (VRF Select).

• The system is installed by a contractor who has successfully completed a Trane factory training
class.

• A verified commissioning report from the Trane VRF Commissioning Tool is submitted.

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 Company-designated
shipping point, freight-allowed to Company's warranty agent's stock location, for all non­conforming 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.

Additional warranty protection is available on an extra-cost basis and must be in writing and
agreed to by an authorized signatory of the Company. Additional terms and conditions of warranty
coverage are applicable for refrigeration equipment. If you wish further help or information
concerning this warranty, contact: Trane—Warrantor, 2701 Wilma Rudolph Blvd., Clarksville, TN

37040.

66 VRF-SVN34A-EN

Warranty For Trane Advantage™ VRF Systems and Related Accessories

VRF-SVN34A-EN 67

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, offers a broad portfolio of advanced
controls and HVAC systems, comprehensive building services, and parts. For more information,

has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.

© 2013 Trane All rights reserved

VRF-SVN34A-EN 01 Feb 2013

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