Trane 4TVH0036B100NB, 4TVH0048B100NB, 4TVH0053B100NB Installation and Maintenance Manual

Page 1

Installation

Variable Refrigerant Flo w (VRF) System

Mini Outdoor Unit Series

Models:

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 tr aining. Impr op er ly in stalled, adjust ed or alt er e d equipment b y an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.

May 201 3 VRF-SVN33A-EN

4TVH0036B100NB 4TVH0048B100NB 4TVH0053B100NB

SAFETY WARNING

Page 2

Introduction

Read this manual thoroughly before operating or servicing this unit.

Warnings, Cautions, and Notices

Safety advisories appear throughout this manual as required. Y our 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. T rane advocates the responsible handling of all refrigerantsincluding industry replacements for CFCs such as HCFCs and HFCs.

Important Responsible Refr iger ant Pr actices

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 MUS T follo w requir ements for field wiring installation and grounding as described in NEC and your local/state electrical codes.

WARNING

Personal Protective Equipment (PPE) Required!

Failure to w ear 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 handli ng recommendations.

• If there is a risk of arc or flash, tec hnicians MUST put on all PPE in accordance with NFPA 70E or other country-specific requirements for arc flash protection, PRIOR t o servicin g the un it.

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 c hange.

Trademarks

All trademarks referenced in this document are the trademarks of their respective owners.

2 VRF-SVN33A-EN

Page 3

Table of Contents

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

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

Preparing for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Unit Dimensions and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Dimensional Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Maximum Quantity of Indoor Units by Mini Outdoor Unit Capacity . . . . . . . 6

Service Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Moving the Mini Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Base Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Securing the Mini Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Condenser Air Discharge Duct (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

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

Important Responsible Refrigerant Practi ce s . . . . . . . . . . . . . . . . . . . . . . . 2

General guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Minimizing Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Selecting Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Pipe Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Branch Joint Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Pipe Thickness and Temper Grade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Refrigerant Piping Maximum Length and Height Differences . . . . . . . . 15

Storing Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Evacuating Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Installing Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Pipe Cutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Nitrogen Flushing While Brazing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Flared Pipe Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Connecting Piping to the Mini Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . 21

Refrigerant Piping Installation Examples . . . . . . . . . . . . . . . . . . . . . . . . . 22

Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Installing a Grounding Rod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Installing the Grounding Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Communications Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Leak Testing Pipe Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

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Vacuum Drying Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Insulating Refrigerant Pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Calculating the Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Charging the Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Connecting the Drain Hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

System Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Configuring the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Initiating System Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Monitoring System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Pre-Start Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Test Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Refrigerant detection operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Service: Pump Down Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Collecting Refrigerant into a Refrigerant Container . . . . . . . . . . . . . . . . . . . . 47

Pump Down Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Warranty For Trane Advantage™ VRF Systems and Related Accessories . . . 49

Basic Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Exclusions and Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4 VRF-SVN33A-EN

Page 5

Preparing for Installation

No. Item Dimension/Size

1 Gas refrigerant pipe

3, 4 ton: 5/8 (15.88) 5 ton: 3/4 (19.05)

2 Liquid refrigerant pipe 3/8 (9.52)

3 Condensate drain holes 0.79 (20)

4 Communication cable holes 0.87 (22.2) x 3

5 Power cable holes 1.36 (34.5) x 3

Unit Dimensions and Weights

Table 1. Unit dimensions and weights

Preparing for Installation

Unit model number

4TVH0036B100NB

4TVH0048B100NB

4TVH0053B100NB 227.1 (103.0) 238.1 (108.0)

Dimensions (WxHxD)

in. (mm)

37 (940) x 47.6 (1210) x 13 (330)

Weight lb (kg)

220.5 (100.0)

Shipping dimensions

(WxHxD)

in. (mm)

39.2 (995) x 53.9 1368) x 16.8 (426)

Shipping weight

lb (kg)

231.5 (105.0)

Dimensional Drawing

Unit : inch (mm)

46.65 (1185)

37.01 (940)

47.64 (1210)

12.99 (330)

14.17 (360)

24.42 (620)

VRF-SVN33A-EN 5

0.98 (25)

21.97 (558)

22.32 (567)

15.12 (384)

4: Ø 0.47 (12)

34.84 (885)

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Preparing for Installation

Maximum Quantity of Indoor Units by Mini Outdoor Unit Capacity

To prevent reducing indoor unit capacity, the sum capacity of indoor units connected to a mini outdoor unit should be no greater than the capacity of the mini outdoor unit. Refer to Table 2.

Table 2. Maximum number of indoor units determined by mini outdoor unit capacity

Mini outdoor unit

model number

4TVH0036B100NB 3 6 19000–49000

4TVH0048B100NB 4 8 24000–62000

4TVH0053B100NB 5 9 27000–69000

Mini outdoor unit

capacity

(tons)

Maximum quantity

of indoor units

connected to a mini

outdoor unit

Total capacity of connected

indoor units

(Btu/h)

6 VRF-SVN33A-EN

Page 7

Service Clearances

Side view

Top view

Back

Front

Back

12 (300)

60 (1500)

80 (2000)

12 (300)

6 (150)

24 (600)

60 (1500)

12 (300)

When the air outlet is opposite a wall

When air outlet is toward a wall

When three sides are blocked by a wall

Top of unit is blocked and the air outlet is toward a wall

When top of unit is blocked and the air outlet is opposite the wall

When from and back of unit are blocked by walls

Install units as shown in the illustrations below (Figure 1, Figure 2, and Figure 3), observing ventilation and service requirements. Space requirements are based on cooling mode operation and an outdoor temperature of 95°F (35°C). More space is required if the outdoor temperature is higher than 95°F (35°C) or if the area is easily heated by solar radiation.

Note: The front of the unit is curved and has the name brand logo on it.

Figure 1. Air flow dire ction

Figure 2. Minimum service clearances for a single mini outdoor unit installation

Preparing for Installation

VRF-SVN33A-EN 7

20 (500)

Page 8

Preparing for Installation

12 (300)

24 (600)

12 (300)

60 (1500)

60 (1500) 24 (600)

120 (3000)

12 (300)

120 (3000)

Figure 3. Minimum service clearances for multiple mini outdoor unit installations

Location Considerations

Choose an installation location based on the following consider ations.

• Install the outdoor unit: – On a suppo rting structure that can bear the weight of the outdoor unit. – With sufficient clearances around the unit for service and repairs. – Install the outdoor unit. – On a flat surface that does not collect rain water. – In a well ventilated location. – Away from strong wind. – Away from direct exposure to rain or snow. – Where there is no risk of flamma ble 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, bloc k the unit from direct exposure to sea breez e by installing

the unit behind a structure (suc h as a building) or a protective wall that is 1 .5 t imes higher than the unit, leaving 28 in. (700 mm) of space between the wall and unit for air

8 VRF-SVN33A-EN

Page 9

Preparing for Installation

ODU

Sea breeze

Sea

Sea breeze

ODU

Protection walls

circulation. Consult an installation expert about taking anti-corrosion measures, suc h as removing salinity on the heat exchanger and applying a rust i nhibitor more frequen tly than once a year.

– 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 b y 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, with a fence or guard rail around it.

• If there is a potential for accumulated snow to block the air inlet or heat exc hanger, install the unit on a higher base.

• R-410A refrigerant is a safe, nontoxic and nonflammable refrigerant. However, if there is a concern about a dangerous level of refrigerant concentration in the case of refrigerant leakage, add extra ventilation.

• Avoid in stalling the o utdoor unit w here cor rosive g ases, suc h as sulfur o xides, ammonia, and sulfurous gas, are produced. If unavoidabl e, consult with an installation specialist about using a corrosion-proof or anti-rust additive to protect the unit coils.

Moving the Mini Outdoor Unit

Follow these guidelines when moving the mini outdoor unit:

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

• Do not lay the unit on its side and do not slant the unit more than 30 degrees.

• Take care to avoid injury while moving the unit; the surface of the heat exchanger is sharp. – If moving the unit with a crane, fasten the wire rope as shown in Figure 4. T o protect damage

or scratches to the unit, use a spreader bar.

– If the unit is being moved a short distance by hand, two people should lift and carry it

together using the transportation handles on the side of the unit, as shown in Figure 4.

VRF-SVN33A-EN 9

Page 10

Figure 4. Moving the mini outdoor unit

Moving by hand

Wire rope/straps

Moving with a crane

Transportation handles

Spreader bar

Wood palette

Ground installation

Base installation: Surface of base must be horizontally level

6 in. (150 mm) min.

Drain pit

6 in. (150 mm) min.

Raised base

6 in. (150 mm) minimum

Unit Installation

Follow these guidelines for installing the mini outdoor unit.

Important: The manufacturer is not responsible for d amage incurred for installatio ns that have

The unit must be installed:

• On a horizontally level surface.

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

not followed these guidelines.

Base Recommendations

General guidelines

A supporting base for the mini outdoor unit:

• Is typically made of concrete.

• Should typically be 1 .5 tim es larger than the bottom of the unit. However , for installatio ns that are subject to snow accumulation, the base should be no larger than the bottom of the unit.

• Should be 6 in. (150 mm) or higher to protect the unit from rain water or other conditions that may cause damage to the unit.

Note: The base height or , if the unit is installed on a frame (see “Minimizing V ibration ” p. 11),

the base height plus the frame height, 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.

10 VRF-SVN33A-EN

Page 11

Minimizing Vibration

Outdoor unit

Anchor bolt with nut/spring/washer

Isolation pad minimum thickness:  1 in. (20 mm)

H-beam

3 in. (75 m m) min.

A: Width of unit mounting foot

1 in.

(20 mm)

Base

Isolation pad dimensions: A + 1/2 to 1 in. (10–20 mm) minimum

Ensure that bolts are loose.

When installing multiple mini outdoor units side by side, or when there is a need to minimize unit vibrations, use a vibration-minimizing structure such as an H-beam frame or a vibration-isolation frame, and an isolation pad. Refer to the specifications in Figure 5.

After installation, apply corrosion-protection to the frame.

Figure 5. Vibration-minimizing structure specifications

Unit Installation

After installing a vibration-isolation frame, loosen the bolts so that the isolat ors are capable of absorbing vibrations (Figure 6).

Figure 6. Bolts on vibration-isolation frame

Securing the Mini Outdoor Unit

The mini outdoor unit must be secured so th at it can withstand a wind speed of 67 mph (30 m/s). Secure the unit firmly to the base with M10 anchor bolts (see Figure 7).

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

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

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Page 12

Unit Installation

14.2 (360)

15.1 (384)

24.4 (620)

37.0 (940)

13.0 (330)

Anchor bolt holes (4)

Figure 7. Anchor bolt positions

If you cannot attac h the unit to the base or if the unit needs additional suppor t, secure it with wires as follows:

1. Loosen the four screws at the top of the unit and wrap wire around each of them.

2. Tighten the screws.

3. Stake the wires to the ground (see Figure 8).

Figure 8. Securing the unit with wire

Condenser Air Dischar ge Duct (optional)

12 VRF-SVN33A-EN

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 th e di scharge 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.

Page 13

Refrigerant Piping

Main pipe

First branch joint

This section contains information on selecting, storing, and connecting refrigerant piping.

Selecting Refrigerant Piping

Refrigerant piping diameter, thic kness, and temper is selected according to length, as sp ecified in this section.

Notes:

• Use insulated, unw elded, 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.

Pipe Diameter

Table 3 specifies the diameter of the main pipe based on unit capacity.

Table 3. Mini outdoor unit main pipe size based on unit capacity

Refrigerant Piping

Mini outdoor unit

capacity

Ton MBH

338

448

553 3/4 in. (19.05 mm)

(a) Increase the gas pipe from the outdoor unit to the first branch joint by one size if the pipe length between the outdoor

unit and the farthest indoor unit, including the elbow, exceeds 295 ft (90 m); or if the outdoor unit capacity declines due to pipe length.

Liquid pipe

in. (mm)

3/8 in. (9.52 mm)

Gas pipe

in. (mm)

5/8 in. (15.88 mm)

(a)

Table 4 specifies the pipe size between branch joints.

Table 4. Pipe size between branch joints

Pipe size (OD)

Indoor unit total capacity

(MBH)

Less than 51

51-79.2 3/4 (19.05)

Liquid

in. (mm)

3/8 (9.52)

Gas

in. (mm)

5/8 (15.88)

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Page 14

Refrigerant Piping

Branch Joint Selection

Table 5 specifies the first branch joint according to mini outdoor unit capacity.

Table 5. First branch joint according to mini outdoor unit capacity

Mini outdoor unit total capacity

(ton) Branch joint model

5 4YDK2512B0138A

Table 6 specifies branch joints connected after the first branch, according to the total capacity of

all indoor units connected after the first branch.

Table 6. Branch joints connected after the first branch, according to total indoor unit capacity

Total indoor unit capacity

(MBH) Branch joint model

Less than 51 4YDK1509B0051A

51–138.5 4YDK2512B0138A

Pipe Thickness and Temper Grade

Table 7 specifies pipe minimum thickness and temper grade based on pipe diameter.

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 soft er copper pipe (C1220T-O) is used, the pipe may break due to its low pressure resistance and cause personal injury.

Table 7. Refrigerant pipe minimum thickness and temper grade

4YDK1509B0051A

CAUTION

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)

14 VRF-SVN33A-EN

Minimum thickness

in. (mm)

Temper grade

Annealed

(C1220T-O)

Drawn

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

Page 15

Refrigerant Piping

Outdoor unit

Indoor units

Y-j o int s

EEV kit

Outdoor unit

Indoor units

Y-j oin ts

Refrigerant Piping Maximum Length and Height Differences

Table 8. Maximum refrigerant piping length and height differences for installations with Y-joints and EEV kits

Piping length and

Piping location

Maximum allowable piping length

Maximum allowable height difference

Maximum allowable length after  Y-joint

(a) If the equivalent length between an outdoor unit and the farthest indoor unit exceeds 295 ft (90 m), increase the gas pipe by one size.

Mini outdoor unit to indoor units

(ft [m])

Actual length

Equivalent length

Main pipe length

Total length The sum of the total length of pipes should be less than 984 ft (300 m)

Height

Actual length

height difference

Y-joint connection (refer to Figure 9)

The distance between the mini outdoor unit and the farthest indoor unit ≤ 492 ft (150 m)

Example: 8 indoor units a+b+c+d+e+f+g+p ≤ 492 ft (150 m)

The distance between a mini outdoor unit and the farthest indoor unit ≤ 574 ft (175 m)

The main pipe (a) from the mini outdoor unit to the first Y-joint should be less than 361 ft (110 m)

H1: Height difference between a mini outdoor unit and indoor unit < 164 ft (50 m)

H2: Height difference between indoor units ≤ 49 ft (15 m)

The distance between the first Y-joint and the farthest indoor unit ≤ 131 ft (40 m)

Example: 8 indoor units b+c+d+e+f+g+p ≤ 131 ft (40 m)

(a)

Y-joint and EEV kit

connection

(refer to Figure 10)

Example: 6 indoor units a+b+c+d+j ≤ 492 ft (150 m)

Allowable length between EEV kit and an indoor unit ≤ 65 ft (20 m)

Example: h, l, j ≤ 65 ft (20 m)

Figure 9. Y-joint connection

Figure 10. Y-joint and EEV kit connection

VRF-SVN33A-EN 15

Page 16

Refrigerant Piping

Distribution header

Mini outdoor unit

Indoor units

Table 9. Maximum refrigerant piping length and height differences for installations with Y-joints and EEV kits

Piping length and

Piping location

Maximum allowable piping length

Maximum allowable height difference

Maximum allowable length after  Y-joint

(a) If the equivalent length between a mini outdoor unit and the farthest indoor unit exceeds 295 ft (90 m), increase the main gas pipe by one size.

Mini outdoor unit to indoor units

(ft [m])

Actual length

Equivalent length

Main pipe length

Total length The sum of the total length of pipes should be less than 984 ft (300 m)

Height

Actual length

height difference

Distribution header connection

(refer to Figure 11)

The distance between the mini outdoor unit and the farthest indoor unit ≤ 492 ft (150 m)

Example: 8 indoor units a+g ≤ 492 ft (150 m)

The distance between a mini outdoor unit and the farthest indoor unit ≤ 574 ft (175 m)

The main pipe (a) from the mini outdoor unit to the first Y-joint should be less than 361 ft (110 m)

H1: Height difference between a mini outdoor unit and indoor unit < 164 ft (50 m)

H2: Height difference between indoor units ≤ 49 ft (15 m)

The distance between the first Y-joint and the farthest indoor unit ≤ 131 ft (40 m)

Example: b+c–f+g ≤ 131 ft (40 m)

(a)

Y-joint and distribution

header connection

(refer to Figure 12)

Example: 8 indoor units a+b+c ≤ 492 ft (150 m)

The distance between the first Yjoint and the farthest indoor unit ≤ 131 ft (40 m) Example: 8 indoor units b+c, d+g ≤ 131 ft (40 m)

Figure 11. Distribution header connection

16 VRF-SVN33A-EN

Page 17

Figure 12. Y-joint and distribution header connection

Indoor units

Distribution header

Mini outdoor unit

Refrigerant Piping

Storing Refrigerant Piping

T o prevent foreign materials or water from entering the pipe, storing method and sealing method (especially during installation) is very important. Apply correct sealing method depending on the environment (see Table 10).

Table 10. Refrigerant pipe storage factors

Storage location

Outdoor

Indoor — Taping

Evacuating Refrigerant

The mini outdoor unit ships with the following amount of refrigerant. Evacuate the un it of all shipwith refrigerant before installing refrigerant piping.

3 ton unit 4 ton unit 5 ton unit

7.1 lbs 7.1 lbs 7.3 lbs

Storage

Longer than one

Shorter than one

Ship-with refrigerant amount by unit type

time

month

month Taping

Sealing

Pipe

type

pinch

VRF-SVN33A-EN 17

Page 18

Refrigerant Piping

Correct: 90º

Oblique

Rough

Burr

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 componen t s 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 pr essur e bef or e open ing syst em f or r epairs. Mixt ur es of r efrigerants 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.

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 moist ur e or dirt t o contaminat e the syst em, damagin g v alve s eals and causing ice formation in system components.

WARNING

NOTICE:

Overview

Pipe Cutting

1. Cut or extend field-supplied piping as needed. To extend pipes, braze or using flared pipe connections (not supplied). Refer to “Pipe Cutting” p. 18, “Nitrogen Flushing While Brazing”

p. 19, and “Flared Pipe Connections” p. 19.)

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

Testing Pipe Connections” p. 29).

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

Outdoor Unit” p. 21).

Required tools:

•Pipe cutter

•Reamer

• Pipe holder

1. Using a pipe cutter, cut the pipe so that the cut edge is at 90° to the side of the pipe.

2. Use a reamer to remove all burrs at the cut edge. Examples of correctly and incorrectly cut pipes.

18 VRF-SVN33A-EN

Page 19

Nitrogen Flushing While Brazing

Flow meter

Pressure regulator

Stop valve

Nitrogen

Length of pipe extending above flare bar

Pipe

Flaring

bar

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 13. Nitrogen flushing while brazing refrigerant pipes

Refrigerant Piping

NOTICE

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

Conventional flare tool

Clutch type Wing nut type

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

VRF-SVN33A-EN 19

Page 20

Refrigerant Piping

Yok e

Flaring bar

Copper pipe

Flare nut

Inclined

Damaged

surface

Uneven

thickness

Correct

Cracked

R.016–.031

45°±2°

90°±2°

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. R emove 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.

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)

Flare dimension

(in.) Flare shape (in.)

20 VRF-SVN33A-EN

Page 21

Connecting Piping to the Mini Outdoor Unit

Service valve: low pressure (gas side)

Service valve:  high pressure (liquid side)

Radiant heat vents

Liquid pipe

Gas pipe

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

Pipes can be connected to the mini outdoor unit at the front, back, bottom, left, or right of the unit:

1. Remove the pipe cover from the unit. See Figure 14.

Figure 14. Pipe connections on unit

Refrigerant Piping

VRF-SVN33A-EN 21

2. R emove the knock-out that you are going to use. Unused knock-outs should remain closed to prevent damage to the unit.

• Take care to prevent damage to the exterior of the unit.

• Remove burrs from knock-out hole edges and apply rust inhibitor.

3. Connect the pipes to the unit using flared connections or by brazing. If brazing the pipe connection, avoid damaging the service valves by wrapping them with a wet cloth.

• Avoid damaging the temperature sensor.

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

Page 22

Refrigerant Piping

Outdoor

unit

Indoor units

Branch joint (4)

Indoor units

Y-j oin ts ( 5)

Outdoor unit

Indoor units

EEV kit

Y-j o int s (5 )

Outdoor

unit

Distribution headers

Indoor units

Outdoor unit

Distribution header

Indoor units

Example with Y-Joints

Outdoor

unit

Example with Y-Joints and EEV Kit

Example with Y-joints and distribution header

Example with distribution headers

Y-j oi n ts

4. Af ter making electrical connections (see “Electrical Wiring” p. 23) and insulating the pipes (see

“Insulating Refrigerant Pipes” p. 32), replace the pipe cover and close the remaining gap. Make

sure the radiant heat vents (Figure 14, p. 21) are not blocked.

Refrigerant Piping Installation Examples

22 VRF-SVN33A-EN

Page 23

Electrical Wiring

circuit

breaker or

disconnect

Communication between

outdoor and indoor units

Power cable

Indoor unit

Ground

Wired remote controller

Ground

Power cable

Communication between

outdoor and indoor units

circuit

breaker or

disconnect

Single-phase, 2-wire, 208-230 V

Mini outdoor unit

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.

See Figure 17, p. 26 for wiring details.

Observe the following precautions when making electrical connections. Refer to wiring diagrams (Figure 15 and Figure 16).

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.

• All wiring must be protected from weather and damage.

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

Electrical Wiring

WARNI NG

NOTICE

Figure 15. Typical system installation wiring with internal EEV

VRF-SVN33A-EN 23

Page 24

Electrical Wiring

Ground

Power cable

circuit

breaker or

disconnect

Communication between

outdoor and indoor units

Power cable

Indoor unit

Ground

circuit

breaker or

disconnect

Wired remote controller

EEV kit

Power cable

Communication

Single-phase, 2-wire, 208-230 V

Mini outdoor unit

See Figure 17, p. 26 for wiring details.

Notes:

• Remove burrs from the knock-out holes.

• 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 16. Typical system installation wiring with external EEV kit

24 VRF-SVN33A-EN

Page 25

Power Wiring

Electrical Wiring

• Multi-pole circuit breaker or disconnect is required to fully isolate the unit from all power.

• Install circuit breakers/disconnects in accordance with local and national codes.

• Select the power cable in accordance with relevant local and national regulations.

• Power cable specifications are based on an und ergro un d/am bien t tem per atur e of 8 6º F (30ºC ) and single multi-conductor cables. If conditions are different from these, consult an electrical installation expert and re-select the power cable. If the length of power cable exceeds 164.04 ft (50 m), re-select the power cable considering the voltage drop.

• Do not use power cable that has exposed wire.

• Unbalanced power must be maintained within 1 0% of su pply rating among all indoor units or the unit will stop and an error code will be generated. (Significantly unbalanced power may shorten the life of the system.)

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

• Provide strain relief for power cables.

WARNING

Avoid Risk of Fire or Explosion!

Do not let the power cable come into contact with the pipes inside the outdoor unit. If the power supply cable touches the pipes, the vibration of the compressor will be transferred to the pipes and can damage the pow er su pply cables o r pipes. The damag e coul d r esult in fire or explosion, causing death or serious injury.

Follow this procedure:

1. Refer to Table 11 for power cable and circuit break e r specifications, and Table 12 for conduit specifications.

Table 11. Circuit breaker and power cable specifications

Power RLA FLA

MCA MOPModel Hz V Fan1 Fan2

4TVH0036B100NB

4TVH0048B100NB 22.1 0.6 0.6 29 50

4TVH0053B100NB 26.0 0.6 0.6 34 55

Notes:

• RLA is based on AHRI 210/240 cooling standard condition (indoor temperature: 80°F (26.7°C) DB/67°F (19.46°C) WB; outdoor temperature: 95°F (35°C) DB.

• Voltage tolerance is ± 10%.

• Maximum allowable voltage between phases is 2%.

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

60 208/230

16.9 0.6 0.6 23 40

Table 12. Cable conduit specifications

Name Te mper 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

VRF-SVN33A-EN 25

Page 26

Electrical Wiring

Solderless ring termina

Thin cable

Thick cable

Cable tie

Detail for connecting

two cables to one terminal

Detail for connecting

two cables to one terminal

L, N: AC power terminals

2. Cut the power cable to an approp riate length and connect it to terminals L and N in the power supply box with a solderless ring terminal (see Figure 17).

Screw Tightening torque for terminal Terminals

M4 0.9–1.1 lbf/ft (1.2–1.5 N.m) Communication: F1, F2

M5 1.5–1.8 lbf/ft (2.0–2.5 N

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 17.

4. Secure the cable(s) with a cable tie and provide strain relief.

5. Replace the cover on the terminal board.

Note: Make sure that the section of the power supply cable that has the sheath removed is

inside the power supply box. If this is not possible, connect the power cable conduit to the power supply box.

6. P ull the power cable through the designated knock-out at the bottom right of the mini outdoor unit (refer to Figure 15, p. 23/Figure 16, p. 24).

Figure 17. Power wiring connections

m) Single-phase AC power: L1, L2

26 VRF-SVN33A-EN

Page 27

Grounding

Grounded to exclusive grounding terminal that is part of the structure

Grounding at the electrical panel

Grounded to grounding rod

Important: Grounding must be done by a qualified electrician. T he unit cannot be ground by a

Ground the unit at an exclusive grounding terminal, at the electrical panel (see Figure 18), or—if the power distribution circuit is not grounded or its grounding does not comply with electrical codes and specifications—to a grounding rod.

Figure 18. Mini outdoo r unit grounding examples

Installing a Grounding Rod

If the installation requires a grounding rod is required, follow this proc ed ure:

1. Select a grounding rod that complies with national and local codes.

2. Select a location for the grounding rod that:

• Contains hard damp soil rather than loose sand or gravel.

• Is located away from underground structures such as gas and water pipes, telephone lines,

and underground cables.

• Is at least 6.6 ft (2 m) away from a lightning conductor.

3. Install the grounding rod in accordance with national and local codes.

4. P r oc eed with “Installing the Grounding Cable.”

Electrical Wiring

gas or water pipe, a lightning rod, or a telephone lin e grou nd in g w ire.

Installing the Grounding Cable

1. Select rated grounding cable by referring to the mini outdoor unit power cable specifications (Table 11, p. 25).

2. Connect the grounding cable to the grounding hole inside the power supply box and pull it through the designated grounding knock-out.

Note: If the grounding cable length needs to be extended, make the cable connection in

accordance with national and local codes.

3. If a grounding rod was installed to ground the unit, measure the resistance with a ground resistance tester. Refer to Table 13 for resistance requirements.

• If the resistance is above the requirements, drive the grounding rod deeper into the ground

or increase the number of grounding rods until the resistance requirement is achieved.

VRF-SVN33A-EN 27

Page 28

Electrical Wiring

F1, F2: Communication between indoor and outdoor units

• If you have grounded the unit to a grounding terminal or electrical panel, ensure that the

resistance meets the requirements.

Table 13. 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

High or average humidity Low humidity

circuit within 0.5 seconds, the allowable grounding resistance is 30–500 .

Communications Wiring

• Refer to BAS-SVX51 for communicatio ns wirin g speci ficatio ns an d best practices.

•Refer to Table 12, p. 25 for cable conduit specifications.

Hazardous Voltage!

• 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 .

WARNING

1. Connect the communications cable wires to the terminals, as shown in Figure 19.

Notes:

• Ensure that mor e than 1 in. (20 mm) of the outer sheath of the power and communication cable conduit are inside the electrical component box.

• To reduce interference, ensure that power and communication cables run in parallel with a minimum space of 2 in. (50 mm) between the cables or, if crossing is necessary, cross at 90 degrees.

• The communication cable between mini outd oor units and between indoor and outdoor units has no polarity.

Figure 19. Communications board and wiring terminals

2. Provide strain relief for the communications cable.

3. Pull the communications cable through the designated knock-out at the bottom right of the mini outdoor unit (refer to Figure 15, p. 23/Figure 16, p. 24).

28 VRF-SVN33A-EN

Page 29

Leak Testing Pipe Connections

Before leak testing pipe connections, read all safety prec au tio ns and notes.

Confined Space Hazards!

Do not work in confined spaces where refrigerant or other hazardous, toxic or flammable gas may be leaking. Refr igerant or other gases could displace av ailable 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 o r response au thor ity. Failur e to tak e appr opr iate pr ecautions or t o react pr oper ly 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 pr essure testing as they may become flammable and could result in an explosion. Refrigerant, when used as a trace gas should only be mixed with dry nitrogen for pressurizing units. Failure to follow these recommendations could result in death or serious injury or equipment or property-only damage.

Do not exceed unit nameplate design pressures when performing a leak test. Failure to follow these instructions could r e sult in an explosio n causi ng death or serious injury.

Leak Testing Pipe Connections

WARNING

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-41 0A refrigerant gas as a tracer for leak detection and use oil-pumped dry nitrogen to develop required test pressures.

• Use tools rated for R-410A.

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

• Perform the leak test with the outdoor unit service valves closed.

VRF-SVN33A-EN 29

Page 30

Leak Testing Pipe Connections

High-pressure side

Nitrogen gas

Low-pressure side

Service ports

Low-pressure (gas side) service valve

High-pressure (liquid side) service valve

Use the following procedure for leak testing pipe connections.

Refrigerant Pipe Damage!

When performing a leak test, use a pressur e r egulator t o pr event an ex cess amount of nitrogen (over 594.6 psi [4.1 MPa]) from entering the pipes. If the pipe is filled with more than the specified amount of nitrogen in a short period of time, pipe damage may occur.

1. Connect the refrigerant manifold gauge hoses to the liquid side and gas side service por ts on the unit, and connect the center hose to a nitrogen gas tank fitted with a pressure regulator (see

Figure 20).

Figure 20. Leak testing pipe connections with a manifold gauge

NOTICE

2. Fill the lines with nitrogen to no more than 594.6 psi (4.1 MPa).

3. Monitor the pressure periodically for a minimum of 24 hours. If the pressure drops, use soapy water to check for leaks. Bubbles will occur if joints are not tight.

4. Release pressure in pipelines gradually.

5. Repair leaks.

6. Repeat the previous steps until the pressure remains constant.

7. Maintain 145 psi (1.0 MPa) of pressure for 15 minutes and chec k for further leakage. If the pressure drops, check for leaks and repair them. Repeat this step as necessary until 145 psi (1.0 MPa) of pressure is maintained for 15 minutes.

8. Remove hoses from service ports.

30 VRF-SVN33A-EN

Page 31

Vacuum Drying Procedure

After performing a successful leak test, follow this vacuum drying procedure:

Notes:

• Use tools rated for R-410A.

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

• Use a vacuum pump with an installed check valve so that pump oil is prevented from flowing into the pipes when the vacuum pump is stopped.

1. Completely close both the liquid and the gas side service valves.

2. Connect the refrigerant manifold gauge hoses to the liquid side and gas side pipe service ports and connect the center hose to the vacuum pump.

3. Open bot h manifold ga uge valves and turn on the vacuum pump. With vacuum pr essure less than 29.7 inH

Note: More time may be needed depending on pipe length or outdoor temperature.

4. Close both manifold gauge valves to isolate the system. Then quickly shut off the vacuum pump.

5. Wait 1 hour. Then use the vacuum gauge to verify that the pressure remains at 29.7 inH it has, proceed to Step 7.

6. If the pressure increases to o ver 29.7 inH pipes. Repair as necessary using the following procedure:

a. Using a nitrogen gas tank fitted with a pressure regulator , attac h hoses from the tank to the

liquid side and gas side service ports on the unit (see location in Figure 20, p. 30). b. Apply nitrogen at 7.25 psi (0.05 MPa) to help remove moisture in the lines. c. Perform the vacuum drying procedure again (steps 1–3) for a minimum of 2 hours. d. Repeat the leak test and the vacuum drying procedure as necessary until the pressure

remains at 29.7 inH

7. Proceed with insulating the pipes (p. 32) and charging the refrigerant (p. 34).

O, allow the vacuum drying to continue for at least 2.5 hours.

O for 1 hour.

O. If

O in an hour, eit her leaks or moisture rem ain i n the

VRF-SVN33A-EN 31

Page 32

Insulating Refrigerant Pipes

Insulation

Gas pipe

Liquid pipe

3/8 in.

(10 mm)

3/8 in.

(10 mm)

3/8 in.

(10 mm)

Insulating Refrigerant Pipes

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

1. Use Table 14 to select the insulation thickness according to pipe siz e and humi dity conditions.

Table 14. Pipe insulation selector

Insulation Type

Standard conditions

86°F (30°C), < 85%

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)

1/2 (12.70)

(b)

5/8 (15.88)

3/4 (19.05)

7/8 (22.23)

Pipe size in. (mm)

3/4 (19) 1.0 (25)

EPDM or NBR

(in. (mm)

High humidity conditions

86°F (30°C), 85%

(a)

2. W rap 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 branc h joints, distribution header , and connection points on each pipe.

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

SVN41).

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

• If gas and liquid pipes are in contact with one another , use thic ker insulation and make sure

the pipes are not pressing tightly against one another.

• Pipe connections between the indoor unit and EEV kit: Leave 3/8 in. (10 mm) of space

between gas and liquid side pipes.

32 VRF-SVN33A-EN

Page 33

Insulating Refrigerant Pipes

Clamp

Insulation

Gas side pipe

Liquid side pipe

• Overlap insulation to avoid gaps.

• Avoid compressing the insulation as much as possible.

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

hangers are attached to pipes.

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

areas.

3. Clamp insulation tightly to pipes.

4. Cut off excess insulation.

VRF-SVN33A-EN 33

Page 34

Refrigerant

After successful leak testing and vacuum drying, calculate the amount of refrigerant needed and then charge the system, as explained in this section.

Calculating the Refrigerant

The initial refrigerant quantity (given in Table 15) is charged into the unit at the factory. Calculate the total amount of additional refrigerant to add to the system as follows: T otal additional refrigerant = [total length of 3/8 in. (0.52 mm) liquid piping x 2.12 oz (60 g)] + [total

length of 1/4 in. (6.35 mm) liquid piping x 0.71 oz (20 g)] + [total refrigerant quantity for all connected indoor units (refer to Table 16)].

Table 15. Initial refrigerant quantity for each mini outdoor unit model

Model

4TVH0036B100NB (3 ton) 4TVH0048B100NB (4 ton) 4TVH0053B100NB (5 ton)

Initial refrigerant quantity: lb (kg)

Table 16. Refrigerant quantity for each indoor unit

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)

0.55

(0.25)

0.53

(0.24)

0.53

(0.24)

0.55

(0.25)

0.82

(0.37)

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)

7.1 (3.2) 7.1 (3.2) 7.3 (3.3)

Capacity (MBH)

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)

34 VRF-SVN33A-EN

Page 35

Charging the Refrigerant

After calculating the correct amount of refrigerant needed by the system (see “Calculating the

Refrigerant” p. 34), charge the system as described in the following procedure:

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.

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.

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.

Refrigerant

WARNING

NOTICE

1. Attach the liquid manifold hose to the liquid side service port and open the manifold gauge valve.

2. Add the liquid refrig erant, 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.

4. If you are unable to add all of the refrigerant needed into the liquid side, close the liquid side service port and remove the liquid manifol d hos e.

5. At tach the gas manifold hose to the gas side service port and open the manifold gauge valve.

Figure 21. Charging additional refrigerant

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

7. To determine if the amount of refrigerant added is correct, use the automatic refrigerant function (see “Refrigerant detection operation” p. 46).

8. After charging the refrigerant, close the service valves and replace caps.

VRF-SVN33A-EN 35

Page 36

Connecting the Drain Hose

1.96 in. (50 mm)

0.51 in. (13 mm)

Base

Drain hose

Bottom of outdoor unit

Drain

plug

Connecting the Drain Hose

When using the air conditioner in the heating mode, ice may accumulate. When the unit is in defrost mode, condensed water must be safely drained away from the unit through a drain hose.

To install the drain hose:

Note: A minimum space of 1.96 in. (50 mm) must be allowed between the bottom of the mini

outdoor unit and the supporting base to facilitate drain hose installation.

1. Insert the drain connector into the drain hole on the underside of the mini outdoor unit.

2. Connect the drain hose to the drain connector.

3. Plug the unused drain holes with drain plugs.

36 VRF-SVN33A-EN

Page 37

Control System

K1 K2 K3 K4

SW01 SW02

7-segment display

K5 K6 K7 K8 K9 K10 K11 K12 K13 K14 K15 K16

Tens Digit Ones Digit

The control board contains a 7 -segment display , th ree DIP switc hes, two rotary switc hes, and four buttons, as shown in Figure 22. Their functions are explained in this section.

Hazardous Voltage!

Before making contact with the inverter circuit board, w ait for at least 15 minutes after powering down the mini 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 22. Control board

Control System

WARNING

System Monitoring

The 7-segment display indicates system power and communication status.

Table 17. 7-segment display

Event Digit 1 Digit 2 Digit 3 Digit 4

Power up Establishing

communication between outdoor and indoor units

Transmit/receive  (normal operation)

(a) 7-segment display example showing power-up is shown in Figure 22.

VRF-SVN33A-EN 37

(a)

“8”“8”“8”“8”

“A” “d” Number of connected indoor units

Indoor unit: “A” Indoor unit: “0” Unit address (decimal number)

Page 38

Control System

Configuring the System

The control board contains two rotary switches and three DIP switches (shown in Figure 22). The following tables explain their functions.

Table 18. Configuration using rotary switches SW01 and SW02

SW01/SW02 Total number of installed indoor units

Tens digit/Ones digit

Table 19. Configuration using DIP switches K5–K8

DIP switch Setting Function description

K5 Not used Not used. Default is 0.

K7 On

K8 On

K7 On

K8 Off

K7 Off

K8 On K7 Off K8 Off

(a) If enabled, the mini outdoor unit fan will operate for 1 minute every 30 minutes to prevent snow build-up. (b) Maintain optimal evaporating temperature in the cooling mode if long line lengths exist. Refer to cooling long pipe

performance data in the technical data book. If you upgrade the performance at your discretion, low discharge air temperature of an indoor unit might cause discomfort.

Use to set total number of installed indoor units.

Notes:

1. For example, if 3 indoor units are installed: Set SW01 to “0”; set SW02 to “3”.

2. Set at mini outdoor unit only.

Snow prevention control

On Disables snow prevention control (default).

Off Enables snow prevention control.

Cooling capacity correction

44.6–48.2°F (7–9°C) (default)

41.0–44.6°F (5–7°C)

48.2–51.8°F (9–11°C)

50.0–53.6°F (10–12°C)

(b)

(a)

38 VRF-SVN33A-EN

Page 39

Control System

Table 20. Configuration using DIP switches K9–K12

DIP switch Setting Function description

Night-time silent mode

K9 On

K10 On

K9 On Mode 1

K10 Off

K9 Off Mode 2

K10 On

K9 Off Mode 3

K10 Off

Heating capacity correction

K11 On

K12 On

K11 On

K12 Off

K11 Off

K12 On

K11 Off

K12 Off

(a) Reduces fan speed for quiet operation. (b) Maintaining factory default status is recommended. However, if the desire is to reduce energy consumption or improve

heating performance, control the operation according to the surrounding environment.

temperature will also decrease.

(d) Heating operation increases frequency when the current high pressure is higher than the target high pressure; and vice

versa.

(e) If the target high pressure is high, the discharge air temperature of an indoor unit will increase, but energy consumption

will also increase.

Disable

3 ton: 600 rpm 4 ton: 600 rpm 5 ton: 620 rpm

3 ton: 540 rpm 4 ton: 540 rpm 5 ton: 560 rpm

3 ton: 480 rpm 4 ton: 480 rpm 5 ton: 500 rpm

Default: 426.7 psi

Default – 28.4 psi

Default – 14.2 psi

Default + 14.2 psi

(a)

(b),(c),(d),(e)

VRF-SVN33A-EN 39

Page 40

Control System

Table 21. System configuration using DIP switches K13–K16

Maximum current per unit model

4TVH0036B100NB

3 ton

DIP switch

K13 On

K14 On

K13 On

K14 Off

K13 Off

K14 On

K13 Off

K14 Off

K15 On

K16 On

K15 On

K16 Off

K15 Off

K16 On

K15 Off

K16 Off

(a) This option is used in locations where humidity is high and, as a result, defrost mode occurs frequently. (b) Maintaining factory default status is recommended. If set to Low, the temperature at which it enters defrost mode will

decrease. If the temperature at which it enters defrost mode decreases, the duration of defrost operation will increase. As a result, the overall heating capacity will be reduced.

exceeded its t.

Maximum current default: 22 A Maximum current default: 24 A Maximum current default: 32 A

Default – 4 A Default – 2 A Default – 2 A

Default – 6 A Default – 4 A Default – 4 A

Default – 8 A Default – 6 A Default – 6 A

4TVH0048B100NB

4 ton

Current limit option

Defrost optimization

Default: Mid

Low1

Low2

4TVH0053B100NB

5 ton

(a),(b),(c)

40 VRF-SVN33A-EN

Page 41

Initiating System Operations

Buttons K1, K2, and K3 are used to initiate system operations. The first two digits of the 7 -segment display respond as shown in the last column of the following tables.

Table 22. Button K1

Control System

Number of times K1

is pressed Operation

1 (hold for 5 seconds) Test operation

4 Vacuum

Refrigerant

Te s t o p e r at i on

Pump down

Completion

charging in heating mode

in heating mode

in heating

mode

Table 23. Button K2

Number of times

button K2 is

pressed Operation

7-segment display:

Digits 1 and 2

Blank

7-segment display:

Digits 1 and 2

1 Refrigerant charging in cooling mode

2 Test operation in cooling mode

3 Pump down in cooling mode

4 Refrigerant detection operation

5Completion Blank

Table 24. Button K3

Number of times

button K3 is

pressed Operation 7-segment display

VRF-SVN33A-EN 41

Initialize (reset)

operation

Same

power up: “8888”

Page 42

Control System

Monitoring System Settings

Buttons K4 is used to monitor system settings and software versions.

Table 25. Button K4

Number of

times button

K4 is pressed Setting Description

1 Current frequency 15 Hz 1,0,1,5

7 Double pipe out tube temperature 113°F (45°C) 7,4,5,0

8 High pressure value 221.9 psi (15.6 kg/cm

9 Fan speed 700 rpm 9,7,0,0

10 ESC(EVI)EEV 180 step A,1,8,0

11 MAIN EEV 1500 step B,1,5,0

12 Present running current 15 A C,1,5,0

13 Number of connected indoor units 10 D,0,1,0

14 Number of operating mini outdoor units 8 E,0,0,8

15 Sum of indoor unit capacity 47,640 Btu/h (12,000 kcal/h) F,1,2,0

(a) Gauge pressure

Low pressure

Outdoor temperature

Discharge temperature

OLP temperature

COND Out

temperature 79.3°F (26.3°C) 6,2,6,3

37.0 psi (2.6 kg/cm2)

74.3°F (23.5°C) 3,2,3,5

177.3°F (80.7°C) 4,8,0,7

203°F (95°C) 5,9,5,0

(a)

2)(a)

Table 26. Button K4 (press and hold for 3 seconds)

7-segment display

Number of times button K4 is

pressed and held 3 seconds

1Inverter

2 EEPROM version 0,9,1,2

Software version/

Unit address

Main circuit board

Automatically assigned unit addresses

Manually assigned unit addresses

board

version

Version examples

Digits 1, 2, 3, 4

0,9,1,2

Digit 1 Digit 2 Digit 3, 4

Address examples

A00, 5

A00, 1

7-segment display

Digits 1, 2, 3, 4

2,0,2,6

8,1,5,6

0,9,1,2

42 VRF-SVN33A-EN

Page 43

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. E nsu re that the power and communication cables of the indoor and mini outdoor uni t s are properly connected.

2. Before supplying power, use a resistance tester to verify that resistance to ground is greater than 30 M.

3. Ensure that the indoor units are connected.

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

5. Ensure that the pre-start checklist (Table 27) has been completed.

Table 27. Pre-start checklist

Installation

Refrigerant pipe

Drain pipe

Electrical

Setting address

Option

Mini outdoor unit

Indoor unit

Pre-Start Checks

NOTICE

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

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

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

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

• Have you 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.)

• 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 the communication cable shielded?

• 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, if multiple remote controllers are to be used?

• Ensure that the vibration-isolation structure is correctly installed or if one needs to be installed.

VRF-SVN33A-EN 43

Page 44

Test Operation

122 (50)

104 (40)

86 (30)

68 (20)

50 (10)

32 (0)

14 (-10)

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

Cooling

Heating

Outdoor temperature: °F (°C)

Indoor temperature: °F (°C)

Notes:

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

• Within the temperature range marked with hashed lines, system protection control may trigger during the test operation. If this occurs, test results may be inaccurate.

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

Test Operation

After all pre-start c hecks (refer to “Pre-Start Chec ks” p. 43) have been have been completed, run the test operation under the following temperature conditions:

WARNING

Hazardous Voltage, Rotating Components!

Do not operate the product with the panel or duct outlet protection net off. There is risk of personal injury from parts that rotate or contain high voltage.

CAUTION

Risk of Burn or Frostbit!

Refriger ant pipe ma y be hot or cold dur ing or r ight af ter the operation depending on the status of the refrigerant which flows through the refrigerant pipe, compresso r, and other parts of th e refrigerant cycle. Do not touch the refrigerant pipe during or right after the operation to avoid getting burned our frostbit.

NOTICE

Avoid Unit Damage!

44 VRF-SVN33A-EN

Wait at least 5 minutes bef o re turning off the main po wer after the test operation is finished. If you do not, wate r leakage or other problems may occur.

Wait at least 3 hours after power is supplied to the outdoor unit before operating it to allow time for the crank case heater to pre-heat. If the crank case heater is not pre-heated before operation, unit parts are at risk of being seriously damaged.

1. Before powering the unit, heed the precautions given above for the test operation.

Page 45

Test Operation

Note: 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 operatio n (see Table 22, p. 41.)

• During the test operation, the compressor is restricted from operating.

• UP (for “unprepared”) will appear on the digital display. When the test operation has

completed, the display will clear.

• The test operation may continue from 30–50 minutes, depending on the operating status.

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

abnormal noises continue to occur.)

4. When the test operation ends, use VRF Enterprise Management Software or VRF AutoCommissioning T ool to issue a test results report. If an y 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.

5. Ensure the following:

• The system has the correct refrigerant amount (see “Refrigerant detection operation” p. 46)

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.

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

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

VRF-SVN33A-EN 45

Page 46

Refrigerant detection operation

Start

Press the K2 button 4 times

Detect amount of refrigerant

Judge the amount of

refrigerant

Satisfy the temperature

condition

Inpu t VRF Technicial Utilities signal

End

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

available)

Refrigerant detection operation

Perform the refrigerant detection operation only under the fol lo wing conditions:

• After the unit has been operating in cooling mode for at least 30 minutes.

• Within the following operating envelope: – Indoor: 68–86°F (20–30°C) – Outdoor: 41–109.4°F (5–43°C)

Failure to comply may result in the operation ending before completion or in inaccurate results. If the unit triggers protection control, the results may be inaccurate.

46 VRF-SVN33A-EN

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 1 0% of the detected amount of refrigerant and restart the refrigerant detection operation.

• If the result is unavailable, chec k that the refrigerant detection operation was conducted within the operating envelope stated above. Perform a test operation to determine if there are any other problems with the system.

Page 47

Service: Pump Down Process

Outdoor unit

Scale

Liquid side

service valve

Gas side

service valve

Manifold gauge

valve 1

Manifold gauge

valve 2

Refrigerant container valve

The pump down process pulls all of the refrigerant in the system into the outdoor unit condenser so that repairs can be made to the system.

Collecting Refrigerant into a Refrigerant Container

WARNING

Refrigerant under High Pressure!

Failure to follow code concerning could result in an explosion which could result in death or serious injury or equipment damage. The refrigerant container used to collect refrigerant from the system must be one that is exclusiv ely designed for that purpose.

The maximum amount of refrigerant that can be put into a mini outdoor unit is 176.4 oz. Because of this limitation, some of the refrigerant should be removed from the system to a refrigerant container before performing the pump down pro c ess.

1. Have ready an empty refrigerant container, a weighing scale, and a manifold gauge.

2. Determine through calculation the current amount of refrigerant in the system.

3. Connect the refrigerant container to the mini outdoor unit and operate 50% o f all indoor units in cooling mode.

Service: Pump Down Process

Figure 23. Removing refrigerant from the system to a refrigerant container

4. Af ter 1 0 minutes of operation, use the manifold gauge to check the liquid side pressure. When the pressure is higher than 420.61 psig (2.9 MPa), decrease the number of operating indoor units.

5. Check the pressure again. When it has decreased to less than 420.61 psig (2.9 MPa), open the liquid side service valve and the manifold gauge valve that is connected to the liquid pipe to let the refrigerant run into the refrigerant container.

Important: The amount of refrigerant that can be put into the refrigerant container should be

approximately 50% of the total refrigerant in the system. Do not fill the refrigerant container more than 85% of its capacity (average temperature 77°F).

6. Use the scale to determine how much refrigerant that has been collected.

7. After the proper amount of refrigerant has been collected, turn off the manifold gauge valve and the liquid side service valve.

VRF-SVN33A-EN 47

Page 48

Service: Pump Down Process

Pump Down Process

Equipment Damage!

Do not allow the amount of system refrigerant that is pulled into the outdoor unit during the pump down process to exceed the capacity of the outdoor unit or equipment damage may occur.

1. Follow the procedure for “Collecting Refrigerant into a Refrigerant Container” p. 47”.

2. Press the K2 button on the outdoor unit control board three times to initiate the pump down process (Table 23, p. 41.)

3. Using a manifold gauge, observe the pressure drop when the compressor starts operating.

4. When the pressure reaches lower than 0 psig (0 MPa), turn off the gas side service valve.

5. Press the K3 button once.

6. R emove manifold gauge.

NOTICE

48 VRF-SVN33A-EN

Page 49

Warranty For Trane Advantage™ VRF Systems and Related Accessories

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

systems and accessories for these products whic h are sold by T rane and applied in accordance with Trane specifications.

Basic Warranty

The warrantor w ar rants for a period of 12 month s from the initial star t-up or 18 mo nths 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 S e lect).

• The system is installed by a contractor who has successfully completed a T rane 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 W ARRANT Y, 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 PA RTICULAR 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.

VRF-SVN33A-EN 49

Page 50

Warranty For Trane Advantage™ VRF Systems and Related Accessories

50 VRF-SVN33A-EN

Page 51

Page 52

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

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

We are committed to using environmentally conscious print practices that reduce waste.

Trane 4TVH0036B100NB, 4TVH0048B100NB, 4TVH0053B100NB Installation and Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

Warnings, Cautions, and Notices

Important Environmental Concerns

Important Responsible Refr iger ant Pr actices

Preparing for Installation

Unit Dimensions and Weights

Dimensional Drawing

Maximum Quantity of Indoor Units by Mini Outdoor Unit Capacity

Service Clearances

Location Considerations

Moving the Mini Outdoor Unit

Unit Installation

Base Recommendations

General guidelines

Minimizing Vibration

Securing the Mini Outdoor Unit

Condenser Air Dischar ge Duct (optional)

Refrigerant Piping

Selecting Refrigerant Piping

Pipe Diameter

Branch Joint Selection

Pipe Thickness and Temper Grade

Refrigerant Piping Maximum Length and Height Differences

Storing Refrigerant Piping

Evacuating Refrigerant

Installing Refrigerant Piping

Overview

Pipe Cutting

Nitrogen Flushing While Brazing

Flared Pipe Connections

Connecting Piping to the Mini Outdoor Unit

Refrigerant Piping Installation Examples

Electrical Wiring

Power Wiring

Grounding

Installing a Grounding Rod

Installing the Grounding Cable

Communications Wiring

Leak Testing Pipe Connections

Vacuum Drying Procedure

Insulating Refrigerant Pipes

Refrigerant

Calculating the Refrigerant

Charging the Refrigerant

Connecting the Drain Hose

Control System

System Monitoring

Configuring the System

Initiating System Operations

Monitoring System Settings

Pre-Start Checks

Test Operation

Refrigerant detection operation

Service: Pump Down Process

Collecting Refrigerant into a Refrigerant Container

Pump Down Process

Warranty For Trane Advantage™ VRF Systems and Related Accessories

Basic Warranty

Exclusions and Limitations