Trane CVHH Installation, Operation And Maintenance Manual

Installation, Operation,
and Maintenance

CVHH Water-Cooled CenTraVac Chillers

With Tracer AdaptiView Control

Model: CVHH

Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air­conditioning equipment can be hazardous and r equires 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 pr ecautions in the literature and
on the tags, stickers, and labels that are attached to the equipment.

October 2014

X39641257001

SAFETY WARNING

CVHH-SVX001A-EN

Introduction

X39003892001A

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

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/ stat e/national electrical codes.

WARNING

CAUTIONs

NOTICE:

Indicates a potentially hazardous
situatio n which, if not avoided, could
result in death or serio us in jur y.

Indicates a potentially hazardous
situatio n which, if not avoided, could
result in minor or moderat e injury. It
could also be used to alert against
unsaf e practices.

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

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, Chlo rin e, Fluorine and
Carbon (HCFCs). Not all refrigerants containing these
compounds have the same po tential impact to the
environment. Trane advocates the responsible handling of
all refrigerants-including industry replacements for CFCs
and HCFCs.

Important Responsible Refrigerant Pr actic es

Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technician s who handle
refrigerants must be certified according to local rules. For
the USA, 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 requirement s that
must also be adhered to for r esponsible management of
refrigerants. Know the applicable laws and follow them.

Note: Graphic labels (shown above) are used for CE

application only.

Important:

• Before servicing, disconnect all power so urces an d

allow at least 30 minutes for capacitors to discharge.

• All electrical enclosures—unit or remote—are IP2X.

© 2014 Trane All rights reserved CVHH-SVX001A-EN

Introduction

X39003892001A

WARNING

Personal Protective Equipment (PPE)
Required!

Installing/servicing this unit could result in exposure to
electrical, mechanical and chemical hazards.

• Before installing/servicing this unit, technicians
MUST put on all PPE required for the work being
undertaken (Examples; cut res istant gloves/sleeves,
butyl gloves, safety glasses, hard hat/bump cap, fall
protection, electrical PPE and arc flash clothing).
ALWAYS refer to appropriate Material Safety Data
Sheets (MSDS)/Safety Data Sheets (SDS) and OSHA
guidelines for proper PPE.

• When working with or around hazardous chemicals,
ALWAYS refer to the appropriate MSDS/ SDS and
OSHA/GHS (Global Harmonized System of
Clas s ification and Labelling of C hemicals ) guidelines
for information on allowable personal exposure
levels, proper respiratory protection and handling
instructions.

• If there is a ris k of energiz ed elec trical c ontact, arc, or
flash, tec hnicians MUST put on all PPE in ac c ordance
with OSHA, NFPA 70E, or other country-specific
requirements for arc flash protection, PRIOR to
servicing the unit. NEVER PE RFORM ANY
SWITCHING, DISCONNECTING, OR VOLTAGE
TESTING W ITHOUT PROPER ELECTRICAL PPE AND
ARC FL ASH CLOTHING. ENSURE ELECTRICAL
METERS AND EQUIPMENT ARE PROPERLY RATED
FOR INTENDED VOLTAGE.

Failure to follow instructions could result in death or
serious injury.

WARNING

Replace Manual in Cabinet After Use!

Failure to replace this Installation, Operation, and
Maintenance manual in cabinet after use could prevent
personnel fr o m access in g necessary safety information
and could r esult in death or serious injury or equipment
damage.

NOTICE:

Do Not Use Non-Compatible Parts or
Materials!

Use of non-compatible parts or materials c ould result in
equipment damage. Only genuine Trane® replacement
components with identical Trane part numbers should
be used in Trane CenTraVac chillers. Trane assumes no
responsibility for damages resulting from the use of
non-compatible parts or materials.

WARNING

Refrigerant May Be Under Positive
P ressure!

Failure to recover refrigerant to relieve pressure or the
use of non-approved refrigerants, refrigerant
substitutes, or refrigerant additives could result in an
explosion which could result in death or serious injury
or equipment damage. System contains oil and
refr igerant and may be under positive pressure.
Recover refrigerant to relieve pressure bef ore opening
the system. See unit nameplate for refrig er ant type. Do
not use non-approved refrigerants, refrigerant
substitutes, or refrigerant additives.

CVHH-SVX001A-EN 3

Note: Graphic labels (shown above) are used for CE

application only.

Copyright

This document and the information in it are the property of
T rane, and may not be used or reproduced in whole or in
part without written permission. 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.

Introduction

Trademarks

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

Revision History

CVHH-SVX001A-EN (10 Oct 2014)

• First version of this literature

Factory Warranty Information

Compliance with the following is required to preserve the
factory warranty:

All Unit Installations

Startup MU ST be performed by Trane, or an authorized
agent of Trane, to VALIDATE this WARRANTY. Contractor
must provide a two-week startup notification to T rane (or
an agent of Trane specifically authorized to perform
startup).

Additional Requirements for Units Requiring
Disassembly

When a new fully assembled chiller is shipped and
received from our Trane manufacturing location and, for
any reason, it requires disassembly or partial
disassembly—which could include but is not limited to the
evaporator, condenser, control panel, compressor/motor,
purge, factory-mounted starter or any other components
origin ally attached to the fully assembled unit—
compliance with the following is required to preserve the
factory warranty:

• Trane, or an agent of Trane specifically authorized to
perform start-up and warranty of Trane
perform or have direct on-site technical supervision of
the disassembly and reassembly work.

• The installing con tractor must notify Trane—or an
agent of Trane spe cifically authorized to perform
startup and warranty of Trane
in advance of the scheduled disassembly work to
coordinate the disassembly and reassembly work.

• Start-up must be performed by Trane or an agent of
Trane specifically authoriz ed to perform startup and
warranty of Tran e

Trane, or an agent of Trane specifically authorized to
perform start-up and warr anty of Trane
provide qualified personnel and standard hand tools to
perform the disassembly work at a location specified by
the contractor. Trane, or an agent of Trane specifically
authorized to per form star t-up and warranty of Trane
products, will perform or have direct on-site supervision of
the disassembly and reassembly work. The contractor
shall provide the rigging equipment such as chain falls,
gantries, cranes, forklifts, etc. necessary for the
disassembly and reassembly work and the required
qualified personnel to operate the necessary rigging
equipment.

Important: Any devi ation from these r equirements

®

products.

must be agre ed upon prior to startup in a
written agreement from Trane.

®

products—two weeks

®

products, will

®

products, will

4 CVHH-SVX001A-EN

Table of Contents

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

Warnings, Cautions, and No tices . . . . . . . . 2

Important Environmental Concerns . . . . . 2

Important Responsible Refrigerant Pra ctices

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Unit and Compressor Nameplates . . . . . . . . 8

Unit Nameplate . . . . . . . . . . . . . . . . . . . . . . . 8

Compresso r Nameplate . . . . . . . . . . . . . . . . 9

Model Number Descriptions . . . . . . . . . . . . . 10

CVHH CenTraVac Chiller Description . . . . 10

CCHH Centrifugal Compressor Descri ption 10

Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . 11

ASHRAE Standard 15 Compliance . . . . . . 11

Unit Shipment . . . . . . . . . . . . . . . . . . . . . . . 11

General Information . . . . . . . . . . . . . . . . . . 11

Installat ion Requirements and Contractor Re-

sponsibilities . . . . . . . . . . . . . . . . . . . . . . . . . 11

Storage Requirements . . . . . . . . . . . . . . . . 13

Unit Components . . . . . . . . . . . . . . . . . . . . . 14

Unit Clearances and Weights . . . . . . . . . . . . 15

Recommended Unit Clearances . . . . . . . . 15

General Weights . . . . . . . . . . . . . . . . . . . . . . 16

Installation: Mechanical . . . . . . . . . . . . . . . . . 17

Operating Environment . . . . . . . . . . . . . . . 17

Foundati on Requirements . . . . . . . . . . . . . 17

Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Standard Chiller Lift . . . . . . . . . . . . . . . . . 17

Special Lift Requirements . . . . . . . . . . . . 18

Unit Isolation . . . . . . . . . . . . . . . . . . . . . . . . 19

Isolatio n Pads . . . . . . . . . . . . . . . . . . . . . . . . 19

Spring Isolators . . . . . . . . . . . . . . . . . . . . . . 19

Leveling the Un it . . . . . . . . . . . . . . . . . . . . . 20

Installation: Water Piping . . . . . . . . . . . . . . . . 22

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Water Treatment . . . . . . . . . . . . . . . . . . . . . 22

Pressure Gauges . . . . . . . . . . . . . . . . . . . . . 22

Valves—Drains and Vents . . . . . . . . . . . . . 22

Strainers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Required Flow-Sensing Devices . . . . . . . . 22

Evaporator and Condenser Water Piping .25

Water Piping Connections . . . . . . . . . . . . . .26

Waterbo x Locations . . . . . . . . . . . . . . . . . . .26

Grooved Pipe Coupling . . . . . . . . . . . . . . . . .27

Flange-Connect ion Adapters . . . . . . . . . . . .27

Victaulic Gasket Instal lation . . . . . . . . . . . . .28

Bolt-Tig htening Sequen ce for Water Pipin g

Connections . . . . . . . . . . . . . . . . . . . . . . . . . .29

Flanges with 8 or 12 Bolts . . . . . . . . . . . . .29

Flanges with 16 or 20 Bolts . . . . . . . . . . . .29

Pressure Testin g Waterside Piping . . . . . . .29

Vent Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Refrigerant Vent Line . . . . . . . . . . . . . . . . . .30

General Requirements . . . . . . . . . . . . . . . .30

Purge Discharge . . . . . . . . . . . . . . . . . . . . .30

Vent Line Materials . . . . . . . . . . . . . . . . . .30

Vent Line Sizing . . . . . . . . . . . . . . . . . . . . .30

Vent Line In stallation . . . . . . . . . . . . . . . . . . .31

Trane Ruptu reGuard . . . . . . . . . . . . . . . . . . .34

General Information . . . . . . . . . . . . . . . . . .34

Connection to External Vent Line and Drip

Leg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Insulati on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Unit In sulation Requirements . . . . . . . . . . .39

Insulation Thickness Requirements . . . . . .39

Installation: Controls . . . . . . . . . . . . . . . . . . . . .41

UC800 Specifications . . . . . . . . . . . . . . . . . .41

Wiring and Port Descriptions . . . . . . . . . .41

Communication Interfaces . . . . . . . . . . . .42

Rotary Switches . . . . . . . . . . . . . . . . . . . . .42

LED Des cription and Operation . . . . . . . .42

Installing the Tracer AdaptiView Display . .44
Adjusting the Tracer AdaptiView Display Arm

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Electrical Requirements . . . . . . . . . . . . . . . . . .46

Installation Requ irements . . . . . . . . . . . . . .46

Electrical Requirements . . . . . . . . . . . . . . . .46

Trane-Supp lied Remote Starter Wiring . . .48

Customer-Supplied Remote Starter Wiring 49

CVHH-SVX001A-EN 5

Table of Contents

Current Transformer and Potential Transform-

er Wire Sizing . . . . . . . . . . . . . . . . . . . . . . . . 50

Power Supp ly Wiring . . . . . . . . . . . . . . . . . . . 51

Three-Phase Power . . . . . . . . . . . . . . . . . 51

Circuit Breakers and Fused Disconnect s . 52

CE for Control Power Transformer (CP TR ) Op-

tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

CE for Starter or Drive . . . . . . . . . . . . . . . 52

Contro l Power Transformer (CPTR) Option

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Power Factor Correction Capacitors (Optional)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Intercon necting Wiring . . . . . . . . . . . . . . . . 56

Starter t o Motor Wiring (Remote-Mount ed

Starters Only) . . . . . . . . . . . . . . . . . . . . . . . . 57

Ground Wire Terminal Lugs . . . . . . . . . . 57

Terminal Clamps . . . . . . . . . . . . . . . . . . . 58

Wire Terminal Lugs . . . . . . . . . . . . . . . . . 58

Bus Bars . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Starter t o Control Panel Wiring . . . . . . . . . 59

Medium Voltage Installation . . . . . . . . . . . . . 60

Medium Voltage Motor . . . . . . . . . . . . . . 60

Motor Terminal Box . . . . . . . . . . . . . . . . . 60

Motor Supply Wiring . . . . . . . . . . . . . . . . . . 61

System Control Circuit Wiring (Field Wiring)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Water Pump Int erlock Circuits and Flow

Switch Input . . . . . . . . . . . . . . . . . . . . . . . 64

Temperature Sensor Circuits . . . . . . . . . . . 65

Optional Control and Output Circuits . . . 66
Optional Tracer Communication Interface 66

Unit St art-up/Commissioning . . . . . . . . . . 66

Starter Module Configuration . . . . . . . . . . 66

Schematic Wiring Drawings . . . . . . . . . . . . 66

Operating Princip les . . . . . . . . . . . . . . . . . . . . 67

General Requirements . . . . . . . . . . . . . . . . 67

Cooling Cycle . . . . . . . . . . . . . . . . . . . . . . . . 67

Oil and Refrigerant Pump . . . . . . . . . . . . . . 68

Motor Cooling System . . . . . . . . . . . . . . . . 70

Tracer Adap tiView Display . . . . . . . . . . . . . 70

RuptureGuard . . . . . . . . . . . . . . . . . . . . . . . . 71

EarthWise Purge . . . . . . . . . . . . . . . . . . . . . . 71

How a Purge System Works . . . . . . . . . . .71

Start-up and Shut-down . . . . . . . . . . . . . . . . . .75

Chiller Sequence of Operation . . . . . . . . . .75

Software Operation Overview Diagram . .75
Start-up Se quence of Operation—Wye-Delta

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Power Up Diagram . . . . . . . . . . . . . . . . . . .78

Ice Machine Control . . . . . . . . . . . . . . . . . . .78

Free Cooling Cycle . . . . . . . . . . . . . . . . . . . . .80

Hot Water Control . . . . . . . . . . . . . . . . . . . . .80

Control Panel Devices and Unit-Mou nted De-

vices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Unit Control Panel . . . . . . . . . . . . . . . . . . .81

User-Defined Language Support . . . . . . .81

Unit St art-up and Shut-down Procedures .81

Daily Unit Start-up . . . . . . . . . . . . . . . . . . .82

Seasonal Unit Start-up . . . . . . . . . . . . . . .82

Daily Unit Shut-down . . . . . . . . . . . . . . . .82

EarthWise Purge Sequence of Operations 83

Purge Operating Modes . . . . . . . . . . . . . .83

Air Removal . . . . . . . . . . . . . . . . . . . . . . . .87

Pump-out Operating Sequence . . . . . . . .87

Carbon Tank and Regeneration Subsystem

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Recommended Maintenance . . . . . . . . . . . . .91

Record Keeping Forms . . . . . . . . . . . . . . .91

Normal Operation . . . . . . . . . . . . . . . . . . .92

Compresso r Oil Change . . . . . . . . . . . . . . . .93

Leak Checking Based on Purge Pump Out

Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

RuptureGu ard Maintenance . . . . . . . . . . . . .94

EarthWise Purge Maintenance . . . . . . . . . .94

Weekly Maintenance . . . . . . . . . . . . . . . . .94

Semi-Annual Maintenance . . . . . . . . . . . .95

Annual Maintenance . . . . . . . . . . . . . . . . .95

Inspecting t he Moisture Indicator . . . . . . .95

Maintaining the Moisture-Indicating Sight

Glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95

Removing Air After Servicing the Chiller .95
Recommended System Maintenance . . .96

6 CVHH-SVX001A-EN

Waterbox Removal and Installation . . . . . . 98

Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Reassembly . . . . . . . . . . . . . . . . . . . . . . . . 99

Torque Requirements . . . . . . . . . . . . . . . 99

Bolt-Tightening Sequence for Waterboxes

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Evaporator Waterbox Covers . . . . . . . . 101

Condenser Waterbox Covers . . . . . . . . 101

Heat Recovery Condenser Waterbox Covers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Forms and Check Sheets . . . . . . . . . . . . . . . 102

Table of Contents

CVHH-SVX001A-EN 7

Unit and Compressor Nameplates

Unit Nameplate

The unit nameplate is located on the left side of the control
panel. A typical unit nameplate is illustrated in
and contains the following information:

• Unit model and size descriptor

• Unit electrical requirements

• Correct operating charge and refrigerant type

• Unit test pressures and maximum operating pressures

• Unit li terature

Serial Number. The unit serial number provides the

specific chiller identity. Always provide this serial number
when call ing for service or during parts identification.

Service Model Number. The service model represents

the unit as built for service purposes. It identifies the
selections of variable unit features requ ired when
ordering replacements parts or requesting service.

No te: Unit-mounted starters are identified by a separate

number found on the starter.

Product Description Block. The CenTraVac™ models

are defined and built using the Product Definition and
Selection (PDS) system. This system describes the product
offerings using a product coding block which is made up of
feature categories and codes that identifies all
characteristics of a unit.

Figure 1

Figure 1. Typical unit nameplate (CDHF shown; CVHH

is similar)

8 CVHH-SVX001A-EN

Compressor Nameplate

TRANE MADE IN USA X39002458010B

MODEL NO.

SALES ORDERSERIAL NO.

The compressor assembly has a separate model number
which is required to identify internal and external
compressor parts. The model number begins with
“ CCHH” and the nameplate is located on the foot of the
volute.

Figure 2. Compressor nameplate

No te: The serial number space on the compressor

nameplate will be intentio nally left blank.

Unit and Compressor Nameplates

CVHH-SVX001A-EN 9

Model Number Descriptions

CVHH CenTraVac
Chiller Description

Digit 1, 2 — Simplex
CenTraVac™ Chiller

Digit 3 — Drive
Digit 4 — Development

Sequence
Digit 5, 6, 7 — Nominal Total

Compressor Tonnage
Digit 8 — Unit M otor Voltage
Digit 9 — Unit Type
Digit 10, 11 — Design Sequence
Digit 12 — M anufacturing

Location
Digit 13 — Hot Gas Bypass

(HGB)
Digit 14 — Starter Type
Digit 15 — Control Enclosure
Digit 16 — Evaporator Shell Size
Digit 17 — Evaporator Tube

Bundle
Digit 18 — Evaporator Tubes
Digit 19 — Evaporator Waterbox
Digit 20 — Condenser Shell Size
Digit 21 — Condenser Tube

Bundle
Digit 22 — Condenser Tubes
Digit 23 — Condenser

Waterboxes
Digit 24 — Auxiliary Condenser

Size and Waterboxes
Digit 25 — Evapora tor Orifice

Size
Digit 26 — Economizer Orifice

Size
Digit 27 — Condenser Orifice

Size
Digit 28 — Unit Option
Digit 29 — Control: Enhanced

Protection
Digit 30 — Control: Extended

Operation
Digit 31 — Tracer™

Communication Interface
Digit 32 — Special Options

Digit 33 — Water Flow Control
Digit 34 — Chilled Water Reset
Digit 35 — Control: Heat

Recovery/Auxiliary Temperature
Sensors

Digit 36 — Industrial Chiller
Package (INDP)

Digit 37 — Control Pow er
Transformer (CPTR)

Digit 38 — Thermal Dispersion
Water Flow Proving

Digit 39 — Compressor M otor
Frame Size

CCHH Centrifugal
Compressor
Description

The compressor assembly has a
separate model number which is
required to identify internal and
exter nal compressor parts. The
model number begins with “ CCHH”
and the nameplate is located on the
foot of the volute.

Digit 1, 2 — Unit Function
Digit 3 — Drive
Digit 4 — Development

Sequence
Digit 5, 6, 7 — Nomin al Total

Compressor Tonnage
Digit 8 — Compressor M otor

Vol t age
Digit 9 — Compressor M otor

Frame Size
Digit 10, 11 — Design Sequence
Digit 12 — Manufacturing

Location
Digit 13, 14, 15, 16 —

Compressor M otor Power (kW)
Digit 17, 18, 19, 20 — First Stage

Compressor Impeller (IMPI)
Digit 21, 22, 23, 24 — Second

Stage Compressor Impeller
(IM P2)

Digit 25, 26, 27, 28 — Third
Stage Compressor Impeller
(IM P3)

Digit 29 — Motor and Terminal
Board Configuration

Digit 30 — Resistent
Temperature Detector

10 CVHH-SVX001A-EN

Pre-Installation

ASHRAE Standard 15 Compliance

Trane recommends that indoor CenTraVac unit
installations fully meet or exceed the guidelines of the
current version of ASHRAE Standard 15, in addition to any
applicable national, state, or local requirements. This
typically includes:

• A refrigerant monitor or detector that is capable of
monitoring and alarming within the acceptable
exposure level of the refrigerant, and that can actuate
mechanical ventilation.

• Audible and visual alarms, activated by the refrigerant
monitor, inside the equipment room and outside of
every entrance.

• The equipment room should be properly vented to the
outdoors, using mechanical ventilation t hat can be
activated by the refrigerant monitor.

• The purge discharge and the rupture disk must be
properly piped to the outdo ors.

• If required by local or other codes, a self-contained
breathing apparatus should be available in close
proximit y to the equip ment room.

For the USA, refer to the latest copy of ASHRAE
Standard 15 for specific guidelines. Trane assumes no
responsibility for any economic, health, or environmental
issues that may result from an equipment room’s design
or function.

Unit Shipment

Inspect u nit while it is still on the truck for an y shipping
damage. The chiller ships shrink-wrapped in a 0.254 mm
(0.010-in.) recyclable film prot ective covering. Do not
remove shrink-wrap for inspection! Inspect for damage to
the shrin k-wrap and determine if physical damage has
occurred.

Each chiller ships from the factory as a hermetically
assembled package; it is factory-assembled, -wired, and

-tested. All openings except for the waterbox vent and

drain holes are covered or plugged to prevent
contamination during shipment and h andling.

p. 14

shows an illustration of a typical unit and its
components. As soon as the unit arrives at the job site,
inspect it thoroughly for damage and material shortages.
In addition:

1 . V erify the hermetic integrity of the unit by checking the

chiller pressure for an indication of holding charge
pressure.

2. To prevent damaging moisture from entering the unit

and causing corrosion, each chiller is pressurized with

20.7 to 34.5 kPag (3 to 5 psig) of dry nitrogen before
shipment.

Figure 3,

Note: The holding charge should register approximately

34.5 kPag (5 psig) at 22.2°C (72°F). P lace a gauge on
the access valve provided (indicated by arrow and
circle in the preceding figure) on the refrigerant
pump discharge line to verify the holding charge.
This access valve is located on the front o f the oil
tank, which is at the right rear corner of the chiller.
If the charge has escaped, contact your local Trane
sales office for instructions.

3. The loose parts box and isolator pads ship on top of the
control panel box.

4. Check the oil sump sight glasses to verify that the sump
was factory-charged with 79.5 L (21 gallons) of oil. The
oil level should be vi sible to about halfway in the top
sight glass. If no oil level is visible, contact your local
Trane sales office.

General Information

Regulations regarding waste handling are constantly
changing. T o ensure that personnel are in compliance with
the latest federal, state and local regulations, contact your
local waste management office for the proper procedures
on handling, disposal, transporting and storage of oil, oil
filters, refrigerant filters, and filter dryer cores.

Installation Requirements and
Contractor Responsibilities

A list of the contractor responsibilities typically associated
with the unit installation process is provided.

CVHH-SVX001A-EN 11

Pre-Installation

WARNING

Combustible Material!

F ailur e to follo w this ins truc tion could r esult in death or
serious injury or equipment damage. Shrink-w rap is a
combustible material. Avoid open flames and hot
sparks.

Note: The chiller should remain within its protective

shrink-wrap covering during storage.

Type o f
Requirem ent

Found ation • Meet foundation requirem ents
Rigging • Safety chains

Disassembly/ Reassembly
(as required)

Isolatio n • Isolation pads or spring

Electrical • Circuit breakers or fusible

Water piping • Flow sensing devices

Relief • Rupture disk assembly

Insulation • Insulation (optional) • Insulation

Water Piping Connection
Components

Other M aterials • Material and equipment to perform leak testing

Trane S upplied
Trane I nstalled

• Trane will per form or have
direct on-site supervision of
the disassembly and
reassembly work (contact
your local Trane office for
pricing)

disconnects (op tional)

• Unit m ounted starter
(optional)

• PFCCs (optional)

• RuptureGuard™ (optional)

Flanged (optional)

• Welded on flange for

2068.4 kPag (300 psig)
waterboxes

Trane Supplied
Field I nstalled

isolators

• Jumper bars

• Temperature sensor
(optional outdoor air)

• Flow switches (m ay be
field supplied)

• Remote-mounted starter
(optional)

(may be field supplied)

Flanged ( optional)

• Victaulic

®

adapter for 1034 .2 kPag
(150 psig) waterboxes

to flang e

Field Supplied
Field I nstalled

• Clevis c onnectors

• Lifting beam

• Isolation pads or s pring isolators

• Circuit breakers or fusible disconnects (opti onal)

• Electrical connections to unit m ounted starter
(optional)

• Electrical connections to remote mo unted starter
(optional)

• Wiring sizes per submittal and NEC or local codes

• PFCCs (rem ote mounted star t er optional only)

• Terminal lugs

• Ground connection(s)

• Jumper bars

• BAS wiring (optional)

• IPC wiring (AFD and remote-m ounted starters only)

• Control voltage wiring (AFD and rem ote- mounted
starters only)

• Oil pum p i nter lock wiring (AFD and remote m ounted
starters only)

• High con denser pressure interlock wiring (AFD and
remote mounted starters only)

• Chilled water pump contactor and wiri ng including
interlock

• Condenser water pump contactor and wiring including
interlock

• Option relays and wiring

• Taps for flow sensing devices

• Ta ps for therm ometers and gauges

• Thermometers

• Strainers (as required)

• Water flow pressure gauges

• Isolation and balancing valves in water piping

• Vents and drain on waterbox valves (one each per pass)

• Pressure relief val ves ( for waterboxes as required)

• Vent line and flex ible conne ctor and vent line from
ruptu re disk to atmosphere

• Chiller feet insulation

Victaulic

• Victaulic coupling for 1034.2 kPag ( 150 psig) and

2068.4 kPag (300 psig) waterboxes

• Fasteners for flanged-type connections (optional)

• Dry nitrogen (55.2 kPag [ 8 psig] maximum per
machine as needed)

12 CVHH-SVX001A-EN

Pre-Installation

Type o f
Requirem ent

“CenTraVac™ Installation
Completion Check Sheet
and Request for Trane
Service”

(CTV-ADF001-EN; refer to

“Forms and Check Sheets,”
p. 102

)

Chiller start-up
com missionin g

(a) Start- up m ust be performed by Trane or an agent of Trane specifically authorized to perform start-up and warranty of Trane® products. Contractor shall

provide Trane (or an agent of Trane specifically authorized to perform start-up) with notice of the scheduled start-up at least two weeks prior to the
scheduled start-up.

( a)

Trane S upplied
Trane I nstalled

• Trane, or an agent of Trane
specifically authori zed to
perform start-up of Trane
pro ducts

®

Trane Supplied
Field I nstalled

Field Supplied
Field I nstalled

• To be completed by installing contractor prior to
contacting Trane for start-up

Storage Requirements

NOTICE:

Ins ulation Damage!

Do not expose unit to direct sunlight as it could result
in damage to factory-installed insulation.

Less than 1 m onth 1– 6 months Greater than 6 m onths

Location requirem ents:

• solid foundation

• vibration free

• dry

• temperature range -40°C to 70°C
(-40°F to 158°F)

• Do not rem ove any plastic coverings • Do not remove any plastic coverings • Do not remove any plastic coverings

• Do not cha rge the chiller with refrigerant

• If additional refrigerant is on site, follow
manufactures storage require m ents

• Verify dry nitrogen pressure using gauge
located on the evaporator shell reads

20.7 to 34.5 kPag ( 3 to 5 psig)

• Notify the l ocal Trane office if charge has
escaped

• Do not operate purge unit • Do not operate purge unit • Do not operate purge unit

Note: Chillers stored 5 years or longer should be inspected every 5 years by a qualified service organ izat ion for leaks.

(a) If protective plastic coverings need to be removed for access and/or service, contact your local Trane office.

Location requirements :

• solid foundation

• vibration free

• dry

• temperature range -40°C t o 70°C
(-40°F to 158°F)

• Do not cha rge the chiller with refrigerant

• If additiona l refrigerant is on site, follow
manufactures storage requirements

• Verify dry nitrogen pressure using gauge
located on the evaporator shell reads

20.7 to 34.5 kPag ( 3 to 5 psig)

• Notify the local Trane office if ch arge has
escaped

• Verify waterbox and tube bundles are
clean and dry

Location requ irements:

• solid foundation

• vibration free

• dry

• temperature range -40°C to 70°C
(-40°F to 158°F)

• Do not charge the chiller with refrigeran t

• If additiona l refr igerant is on site, follow
manufactures storage requirements

• Verify dry nitrogen pressure u sing gauge located
on the evaporator shell reads 20.7 to 34.5 kPag
(3 to 5 psig)

• Notify the local T rane office if charge has escaped

• Verify waterbo x and tube bundles are clean and
dry

• Conduct an oil analysis and verify no oil
breakdown

• Repeat yearly

• Replace oil if breakdown has occurred

• If no oil analysis pro gram has been followed,
replac e oil prior to start up

(a)

CVHH-SVX001A-EN 13

Pre-Installation

1

2

3

4

0

-

0

6

7

5

9

8

Unit Components

No te: The control p a nel side of the unit is always

designated as the front side of the unit.

Figure 3. Typical Simplex CVHH CenTraVac chiller

1. Suction Elbow

2. Comp ressor

3. Terminal Box

4. Control Panel

5. Condenser

6. Motor Housing

7. Economizer

8. Oil Tank Assembly

9. Purge

10. Evapo rat or

11. Display Panel

14 CVHH-SVX001A-EN

Unit Clearances and Weights

Optional unit
mounted
starter

Condenser

Evaporator

Econom izer

Motor

B

A

E

Right hand tube pull shown,
apply tube pull clearance
dimension to left end for
left hand tube pull.

These dim ensions per
NEC Article 110

46 cm (18 in.)

C

D

92 cm (3 ft)

Recommended Unit Clearances

Adequate clearances around and above the chiller are
required to allow sufficient access for service and
maintenance operations. Specific unit clearan ce
requirements are indicated in the submittal package
provided for y our unit.

• Do NOT install piping or conduit above the compressor
motor assembly or behind the suction elbow of the
unit.

Figure 4. Clearance requirements

• Minimum vertical clearance above the unit is 92 cm
(3 feet).

• Use a housekeeping pad to provide bet ter service
clearances; refer to submittal for more infor mation.

Per NEC Article 110: Unit mounted starters from 0–600V
require a 107 cm (42 inch) clearance, 601–2500V require a
122 cm (48 inch) clearance, and 2501–9000V require a
152 cm (60 inch) clearance. Refer to NEC and local
electrical codes for starter and control panel clearance
requirements.

CVHH-SVX001A-EN 15

Unit Clearances and Weights

Table 1. Clearance requirements

ABCDE

Shell Combo

100M/ 100M 213 84 422 166 1057 416 30 12 310 122

100M/ 10HM 213 84 422 166 1057 416 79 31 300 118

100L/100L 213 84 422 186 1161 457 30 12 310 122

130M/ 130M 224 88 422 166 1067 420 74 29 277 109

130M/ 13HM 224 88 422 166 1067 420 79 31 312 123

160M/ 200M 244 96 422 166 1087 428 94 37 285 112

160M/ 20HM 244 96 422 166 1087 428 91 36 325 128

200L/200L 272 107 472 186 1217 479 86 34 282 111
200L/20HL 272 107 472 186 1217 479 94 37 333 131
200L/220L 272 107 472 186 1219 480 94 37 305 120
220L/220L 305 120 472 186 1252 493 97 38 300 118
220L/22HL 305 120 472 186 1250 492 107 42 363 143

(a) All dimensions are approximate; refer to the unit submittal package for exact dimensions for your unit .

cm in. cm in. cm in. cm in. cm in.

General Weights

The unit weight information provided in
be used f or general information purposes only. Trane
does not recommend using this weight information for
considerations relative to chiller handling. The large
number of variances between chiller selections drives
vari ances in chiller weights that are not recognized in
this table. For specific we ights for your chiller, refer to
your submittal package.

The values in
the following:

• TECU 0.028-i n. (0.71 mm) tube wall.

• 1034.2 kPag (150 psig) non-mari ne waterboxes.

Table 2 representing chiller weights include

(a)

Tab le 2 should

• Chillers with starter weights i nclude the weight of

the h eaviest possible starter.

• Heaviest possible bundle and heaviest possible

motor combination for the application family
chiller.

The values in

Table 2 representing chiller weights do NOT

include the following options:

• INDP (Industrial Contr ol Panel) option—add 23 kg

(50 lb)

• CPTR (Control Panel Transformer) option—add

127 kg (280 lb)

• SMP (Supplemental Motor P rotection) option—add

230 kg (500 lb)

• Oper atin g weights in clude the largest possible
refrigerant charge.

Table 2. Unit weights

Weight w it hout Starters Weight w ith Start ers

Operat ing Shipping Operat ing Shipping

MODEL NTON Hz EVSZ CDSZ kg lb kg lb kg lb kg lb

CVHH 900–1200 60 100M 100M 19748 43538 17218 37959 20044 44190 17514 38611

900–1200 60 100L 100L 20562 45331 17802 39246 20858 45983 18097 39898
900–1200 60 100M 10HM 21946 48382 19226 42386 22241 49034 19522 43038
900–1200 60 130M 130M 22193 48927 19019 41929 22489 49579 19314 42581
900–1200 60 130M 13HM 24873 54836 21522 47447 25169 55488 21817 48099
900–1200 60 160M 200M 25523 56269 21503 47405 25819 56921 21798 48057
900–1200 60 160M 20HM 28516 62868 24353 53690 28812 63520 24649 54342
900–1200 60 200L 220L 28443 62707 23780 52425 28739 63359 24075 53077

900–1200 60 220L 220L 30193 66564 25080 55291 30489 67216 25375 55943
1700–1500 60 200L 200L 27480 60583 23188 51120 27776 61235 23483 51772
1700–1500 60 200L 20HL 30683 67644 26248 57867 30979 68296 26544 58519
1700–1500 60 220L 220L 30588 67434 25474 56161 30883 68086 25770 56813
1700–1500 60 220L 22HL 34497 76053 29234 64451 34793 76705 29530 65103

1550 50 200L 200L 28456 62735 24164 53272 28752 63387 24459 53924
1550 50 200L 20HL 31659 69796 27224 60019 31955 70448 27520 60671
1550 50 220L 220L 31564 69586 26450 58313 31859 70238 26746 58965
1550 50 220L 22HL 35473 78205 30211 66603 35769 78857 30506 67255

16 CVHH-SVX001A-EN

Installation: Mechanical

Operating Environment

Important:

• The stan dard chille r is designed for indoor use only

and as such has NEMA Type 1 or IP 20 enclosures.

• For chillers in unheated equipment rooms, contact
your local Trane service agency for methods to ensure
that the oil temperature is maintained suitable for
proper operation of the chiller.

T o ensure that electrical components operate properly, do
not locate the chiller in an area exposed to dust, dirt,
corrosive fumes, or excessive heat and humidity. The
ambient temperature range for chiller operation is 1.1°C to
40°C (34°F to 104°F).

NOTICE:

E quipment Failure!

Unit operating at ambient temperatures exceeding
40°C (104°F) could result in starter component damage
due to the panel’s inabili ty to dissipate heat adequately .
If any of these adverse operating conditions are
present, take necessary action to improve the
equipment room environment.

Foundation Requirements

Chiller mounting surface must be:

• rigid non-warping mounting pads or a concrete

foundation.

• able to support the chiller at its full operating weight

(including completed piping, and full operating
charges of refrigerant, oil and water.)

F or proper unit operation, the chiller must be level within

1.6 mm (1/16 in.) over its length and width when set into

place on the mounting surface.
approximate weights for various chiller sizes and options.

Note: For specific weigh t information, refer to the unit

submittal package.

Important: Tran e will not assume responsibility for

equipment problems resulting from an
improperly designed or constructed
fou ndation.

Table 2, p . 16 shows

Rigging

Lifting is the recommended method for moving chillers.
Suggested lifting arrangements for standard units are
described in

Note: The lifting beam used for Simplex units must be at

“ Standard Chiller Lift,” p. 17.

least 4.572 meters (15 feet) long.

WARNING

Heavy Objects!

Failure to properly lift unit could result in death or
serious injury, or equipment or property-only damage.
Do not use cables (chains or slings) except as s hown in

Figure 5, p. 18. Each of the cables (chains or slings)

used to lift the unit must be capable of supporting the
entire weight of the unit. Lifting cables (chains or
slings) m ay not be of the same length. Adjust as
necessary for even unit lift.

WARNING

Improper Unit Lift!

Failure to properly lift unit could result in death or
serious injury, or equipment or property-only damage.

• T es t lift unit approximately 61 c m (24 inches ) to verify
proper center of gravity lift point. T o a v oi d dropping
of unit, reposition lifting point if unit is not level.

• Do not lift chiller utilizing waterbox lifting lug.
Waterbox lifting lug is to be used only f o r removing
waterbox from chiller.

• Do not lift chiller utilizing elbow lifting tab. Elbow
lifting tab and approved clevis are used when
removing elbow from chiller.

NOTICE:

W iring Damage!

Damage to unit wiring could result in equipment
failure. Care must be t aken during rigging, assembly
and disassembly to avoid damaging unit wiring.

Standard Chiller Lift

1. Insert clevis connections at the points indicated in

Figure 5, p. 18. A 63.5 mm (2.5 in.) diameter lifting hole

is provided at each of these points.

2. Attach the lifting chains or cables.

3. Once the lifting cables are in place, attach a safety chain
or cable between the first-stage casing of the
compressor and the lifting beam.

Important: There should not be tension on this safety

cable; the cable is used only to prevent the
unit from rolling during th e lift.

4. Position isolator pads or spring isolators beneath the
chiller feet (refer to
instructions).

Note: Follow instructions provided by the spring

isolator man ufacturer, being careful to not
damage isolator adjustment bo lt.

“ Unit Isolation,” p. 19 for

CVHH-SVX001A-EN 17

Installation: Mechanical

Safety
chain or
cable

Jack slots

4.572 meters
(15 feet)
minimum
effective length

5. Once the isolators are in place, lower the chiller—
working from end to end—in small increments to
mai ntain stability.

6. When lift is complete, detach the clevis co nnection s
and safety chain.

Figure 5. Typical rigging arrangements for Simplex

units

Spec ial Lift Requirements

NOTICE:

Oil Loss!

F ailure to prevent oil migration out of the oil tank could
res ult in equipment failure or proper ty-only damage. To
prevent oil migration out of the oil tank during lifting
procedures, remove the oil from the oil tank if the unit
will be lifted at any angle greater than 15° from
horizontal end-to-end. If oil is allowed to run out of the
oil tank into other areas of the chiller, it will be
extremely difficult to return the oil to the oil tank even
during operation.

NOTICE:

Equipment Damage!

Moving the chiller using a fork lift could result in
equipment or property-only damage. Do not use a fork
lift to move the chiller!

NOTICE:

Compressor Alig nment!

Failure to preserve compressor alignment could result
in equipment or property-only damage. Lifting the
compressor/motor assembly from the shells without
factory-installed doweling in the compressor casting
flanges could result in misalignment of the compres sor
castings.

If the chiller cannot be moved using a standard chiller lift,
consider the following:

• When job site conditions require rigging of the chiller
at an angle greater than 45° from horizontal (end-to­end), the unit may require removal of the compressor.
Contact Trane or an agent of Trane specifica lly
authorized to perform start-up and warranty of T rane
products reg arding the disassembly and reassembly
work. For more information, refer to

Information,” p. 4

Note: Disassembly and reassembly work includes

dowel-pinning the compressor and removing it
from the unit. Contact Trane or an agent of
Trane specifically authorized to perform start­up and warranty of T rane
rigging instructions. Do NOT attempt to rotate
the chiller onto its side.

• When lifti ng the chiller is either i mpractical o r
undesirable, attach cables or chains to the jacking slots
shown in
across a smooth surface. Should the chiller be on a
shippin g skid, it is not necessary to remove the skid
from the chiller before moving it into place.

• If removal of the compressor or economizer assembly
is necessary to move the chiller to the operating

Figure 5, p. 18; th en push or pull the unit

.

“ Factory Warranty

®

products for specific

®

18 CVHH-SVX001A-EN

Installation: Mechanical

228.6 mm
(9 in.)

457.2 mm
(18 in.)

9.525 mm
(3/ 8 in.)

Condenser

Evaporator

Length

2

5

1

4

6

3

Width

I solator Configuration 1

Origin:
Right front corner of
evap right front foot

Condenser

Evaporator

Length

2

5

1

4

6

3

Evap
Width

Width

I solator Configuration 2

location, contact T rane. F or more information, refer to

“ Factory Warranty Information,” p. 4.

Unit Isolation

T o minimize sound and vibration transmission through the
bui lding structure, and to ensure proper weigh t
distribution over the mount ing surface, always install
isolation pads or spring is olators under the chiller feet.

No te: Isolation pads (see

Figure 6) are provided with each

chiller unless spring isolators are specified on the
sales order.

Specific isolator loading da ta is provided in the unit
submittal package. If necessary, contact your local Trane
sales office for further information.

Important: When determining placement of isolation

pads or spring isolators, remember that the
control panel side of the unit is always
desig nated as the uni t front.

Isolation Pads

When the unit is ready for final placement, position
isolation pads (457.2-mm sides) end for end under the full
length of the chiller leg. The pads measure 228.6 mm x

457.2 mm (9 in. × 18 in.) and on some units there may be
small gaps between pads. Pads are provided to cover
entire foot.

Figure 6. Is olation pad and dimensions

Remember that the chiller must be level within 1.6 mm
(1/16 in.) over its length and width after it is lowered onto
the isolation pads. In addition, all piping connected to the
chiller must be properly isolated and supported so that it
does not place any stress on the unit.

Spring Isolators

Spring isolators should be considered whenever chiller

installation is planned for an upper story location. Base
isolator placement is shown in

Table 3.

CVHH-SVX001A-EN 19

Figure 7; also refer to

Figure 7. Isolation spring placement by shell size,

evaporator and condenser lengt h

Table 3. Isolation spring placement, cm (in.)

Origin

to

to

Center

of

Middle

Pad

153.7

(60.5)

171.5

(67.5)

153.7

(60.5)

171.5

(67.5)

138.4

(54.5)

153.7

(60.5)

138.4

(54.5)

N/A

N/A

N/A

N/A

N/A

EVSZ CDSZ W idt h

200L 200L

220L 220L

200L 20HL

220L 22HL

160M 20HM

200L 220L

160M 200M

100M 100M

100L 100L

130M 130M

100M 10HM

130M 13HM

285.0

(112.2)

303.3

(119.4)

336.0

(132.3)

361.0

(142.5)

323.3

(127.3)

285.2

(112.3)

270.3

(106.4)

264.4

(104.1)

264.4

(104.1)

277.6

(109.3)

300.2

(118.2)

313.4

(123.4)

Evap

Width Length

170.2

457.2

(67)

(180)

188.0

457.2

(74)

(180)

170.2

457.2

(67)

(180)

188.0

457.2

(74)

(180)

154.9

406.4

(61)

(160)

170.2

457.2

(67)

(180)

154.9

406.4

(61)

(160)

406.4

N/A

(160)

457.2

N/A

(180)

406.4

N/A

(160)

406.4

N/A

(160)

406.4

N/A

(160)

I solator

Config

2

2

2

2

2

2

2

1

1

1

1

1

Origin

Center

of Rear

Pad

268.5

(105.7)

286.8

(112.9)

319.5

(125.8)

345.4
(136)

306.8

(120.8)

268.7

(105.8)

253.7

(99.9)

247.9

(97.6)

247.9

(97.6)

261.1

(102.8)

283.7

(111.7)

296.9

(116.9)

Spring isolators typically ship assembled and ready for
installat ion. To install and adjust the isolators properly,
follow the instructions given.

Installation: Mechanical

Side View of Unit End View of Unit

Outside edge
of tube sheet

Center tube
sheet
support leg

Center of
isolator
spring

Note: The spring isolator must be cent ered

in relation to the tube sheet. Do not
align the isolator with the flat part of
the chiller foot since the tube sheet is
often off center

Note: The length of the

isolator should
be parallel to the
leg.

Note: Do not adjust the isolators until the chiller is piped

and charged with refrigerant and water.

1 . Position the spring isolators under the chiller as shown

in

Figure 7. Ensure that each isolator is centered in

relation to the tube sheet.

No te: Spring isolators shipped with the chiller may

not be identical. Compare the data provided in
the unit submittal package to determine proper
isolator placement.

2. Set the isolators on the sub-base; shim as necessary to
provide a flat, level surface at the same elevation for
the end supports.

Important: Support the full underside of the isolator

base plate; do NOT straddle gaps or small
shims.

3. If required, bolt the isolators to the floor through the
slots provided, or cement the pads.

Note: Fastening the isolators to the floor is not

necessary unless specified.

4. If the chiller must be fastened to the isolators, insert
capscrews through the chiller base and into holes
drilled and tapped in the upper housing o f each
isolator.

Important: Do NOT allow the screws to protrude below

the underside of the isolator upper housing,
or interfere with the adjusting bolts. An
alternative method of fasteni ng the chiller
to the isolators is to ceme nt the neoprene
pads.

5. Set the chiller on the isolat ors; refer to

Chiller Lift,” p. 17

. The we ight of the chiller will force
down the upper housing of each isolator, and could
cause it to rest on the isolator’s lower housing (refer to

Figure 8).

“ Standard

.

Figure 8. Chiller foot and isolator orientation

6. Check the clearance on each isolator. If this dimension
is less than 6.35 mm (1/4 in.) on an y iso lator , use a
wrench to turn the adjusting bolt one complete
revolution upward.

Note: When the load is applied to the isolators (

Step 5),

the top plate of each isola tor moves down to
compress the springs until either the springs
support the load or the top plate rests on the
botto m housing of the isolator. If the springs are
supporting the load, screwing down on the
adjusting bolt (

Step 7) will raise the chiller.

7. Turn the adjusting bolt on each of th e remaining
isolators to obtain the required minimum clearance of

6.35 mm (1/4 in.).

8. Once the minimum required clearance is obtained on
each of the isolators, level the chil ler by turning the
adjusting bolt on each of the isolators on the low side
of the unit. Work from one isol ator to the next.

Important: The chiller must be level to within 1.6mm (1/

16 in.) over its length and width, and the
clearance of each isolator must be at least

6.35 mm (1/4 in.).

Leveling the Unit

20 CVHH-SVX001A-EN

The chiller must be set level within 1.6 mm (1/16 in.).
1 . Measure and make a punch mark an equal distance up

from the bottom of each foot of the chiller.

Installation: Mechanical

2

1

2. Suspend a clear plastic tube along the length of the
chiller as shown in the following figure.

3. Fill the tube with water u ntil the level aligns with the
punch mark at one end of the chiller.

4. Check the water level at the opposite mark. If the water
level does not align with the punch mark, use full

Figure 9.

Note: Use of a laser level is an acceptable alternative

method to level the unit.

Important: Immediately report any unit damage

incu rr ed during handling or installation at
the job site to the Trane sales office.

length shims to raise one end of the chiller until the
water level at each end of the tube aligns with the
punch mar ks at both ends of the chiller.

5. Once the unit is level across its length, repeat
through

Step 3 to level the unit across its width.

Step 1

CVHH-SVX001A-EN 21

Installation: Water Piping

Overview

The following water piping circuits must be installed and
connected to the chiller:

• Pipe the evaporato r in to the chilled water circuit.

• Pipe the condenser into the cooling tower water circuit.

• Optional: A heat-recovery condenser water circuit.

• Optional: An auxiliary condenser water circuit.

No te: Piping must be arranged and supported to avoid

stress on the equipment. It is strongly
recommended that the piping contractor does not
run pipe closer than 0.91 m (3 feet) minimum to the
equipment. This will allow for proper fit upon
arrival of the unit at the job site. Any adjustment
that is necessary can be made to the piping at that
time. Expenses that result from a failure to follow
this recommendation will not be pai d by Trane.

Piping suggestions for each of the water circuits listed
above are ou tli ned in

Piping,” p. 25

installation of field supplied piping compon ents (e.g.,
valves, flow switches, etc.) common to most chiller water
circuits are listed below.

. General recommendations for the

“ Evaporator and Condenser Water

Water Treatment

The use of untreated or improperly treated water in a
CenT raVac may result in inefficient operation and possible
tube damage.

Important: Trane strongly recommends using the

services of a qualified water treatment
specialist to determine necessary water
treatment. A lab el with a customer
disclaimer note is affixed to each unit.

NOTICE:

P roper Water Treatment!

Trane assumes no responsibility for equipment failures
which result from untreated or improper l y treated
water, or saline or brackish water. The use of untreated
or improperly treated water in a CenTraVac could result
in scaling, erosi on , corrosion, algae or slime. It is
recommended that the services of a qualified water
treatment specialist be engaged to determine what
water treatment, if any, is required.

Pressure Gauges

Valves—Drains and Vents

NOTICE:

W aterbox Damage!

Failure to follow instructions could res ul t in damage to
the waterbox. Do not over-tighten or use excessive
Tef lon® pipe tape when installing valves, drains, plugs
and vents on waterboxes.

1 . Install field-supplied air vents and drain valves on the

waterboxes. Eac h waterbox is provided with a National
Pipe Thread Female (NPTF ) vent and drain connection;
the openi ngs are 19.05 mm (3/4 i n.).

NOTICE:

Over-pressurization!

Failure to install pressure-relief valv es in the condenser
and evapora tor water circuits could result in waterbox
damage due to hydrostatic expansion.

2. If necessary for the application, install pressure-relief
valves at the drain connections on the evaporator and
condenser waterboxes. To do so, add a tee with the
relief valve attached to the drain valve. Fol low local
codes for determining if drai n connection is large
enough for relief devices.

T o determine whether or not pressure relief valves are
needed for a specific application, keep in mind that:

a. Vessels with close-coupled shutoff valves may

cause high potentially damaging hydrostatic
pressures as fluid temperature r ises.

b. Relief valves are required by American Society o f

Mechanical Engineers (A SME) codes when the
waterside is ASME. Follow ASME guidelines or
other applicable codes/local regulation to ensure
proper relief valve installation.

Strainers

NOTICE:

Tube Damage!

Failure to install strainers in all water piping entering
the chiller could result in tube plugging conditions that
damage unit components.

Locate pressure gauge taps in a straight length of pi pe.
Place each tap a minimum of one pipe diameter
downstream of any elbow, orifice, etc. F or example, for a

152.4 mm (6 in.) pipe, the tap would be at least 152.4 mm
(6 in.) from any elbow, orifice , etc.

22 CVHH-SVX001A-EN

Install a strainer in the entering side of each piping circuit
to av oid possible tube plugging in the chiller with debris.

Required Flow-Sensing Devices

The ifm efector® flow detection controller and sensor (see

“ Water Flow Detection Controller and Sensor—ifm

Installation: Water Piping

Components:

A. E40174 – 1/2" NPT adapter (for ow probe)

B . SF6200 – Flow probe

C . SN0150 – Flow control monitor

D. E70231 – Combicon connectors (quantity 5)

E . E10965 – Micro DC cable, 10m length, PUR jacket

F. F53003 – Din rail, 40mm length

Output to

control cabinet

Jumper

N

L

AC

Jumper

monitoring

rated using

monitoring

rail (F) into control cabinet.

in combicon connectors (D) according to

4

3

2

1

If factory-provided,
located in control panel.

efector,” p. 23) are used to verify evap orat or and

condenser water flows.
If a customer-suppl ied flow sensing device is used to

ensure adequate chiller protection, refer to the wiring
diagrams that shipped with the unit for specific electrical
connections.

Be sure to follow the manufacturer’s recommendations for
device selection and installation.

Water Flow Detection Controller and Sensor—ifm
efector

Figure 10. Installation of ifm efec tor flow detection

controller and sensor

2. Insert the flo w probe through the 1/2-in. NPT adapter
as near the center of the pipe as p ossible (see item
labeled “ 2” in

Figure 10, p. 23). Finger-tighten the

1/2-in. NPT adapter; then, tighten with a wrench an
additional 1-1/4 turns.

Note: When installed, the tip of the ifm efector sensor

probe must be at least 2.54 cm (1 in.) away from
any pipe wall. Placing the tip of the probe at the
center of the pipe is preferred.

3. Install the Micro DC Cable by inserting it through the
wire openings on the back side of the control panel (see
item labeled “ 3” in

Figure 10, p. 23). Install the

supplied Micro DC C able (9 meters [25 feet] in length)
to the Flow Probe and hand-tighten the connector nut.

4. Plug the other end of the Micro DC C able into the Flow
Control Monitor with the Combicon connector (see
item labeled “ 4” in

Figure 10, p. 23). R efer to Figure 11

for cable wiring.

1. Mount the 1/2-in. NPT adapter in a horizonta l or
vertical section of pipe. The maximum distance from
the control panel must not exceed 8.99 meters (29.5 ft)
(see item labeled “ 1” in
five pipe diameters straight run of pipe upstream of the
sensor location, and three pipe diameters straight run
of pipe downstream of the sensor location.

No te: In the case of a horizontal pipe, mounting the

CVHH-SVX001A-EN 23

Figure 10, p. 23). Allow at least

sensor in the side of the pipe is preferred. In the
case of a vertical pipe, mounting the sensor in
a place where the water flows upwards is
preferred.

Installation: Water Piping

X39003892001A

7

NOTICE:

Do Not Apply Elec tric al Power to a Unit in
a Vacuum!

Failure to disconnect power to units with
inside-the-delta solid state starters during evacuation
or when the unit is in a deep vacuum could cause
compressor motor damage. Applying electrical power
to a motor in a vacuum could cause damage to the
motor. In addition, on units with inside-the-delta solid
state starters, all power to the unit must be
disconnected prior to evacuating the unit as line power
is directly applied to the motor terminals 4, 5, and 6.

flow setting cutout and adjusting counterclockwise (-)
increases the flow setting cutout.

Note: The “ Temp” potentiometer on the ifm efector

control module has no effect in Trane
application. It is not necessary to make
adjustments to the “ Temp” potentiometer.

8. Once the cutout setting is adjusted, the cutout setpoint
will be indicated with a yellow light on the Flow Control
Monitor LED bar graph display. When the water flows
are higher than the cutout, a green light will indicate
proper flow status. If the flows fall below the cutout
setpoint, a red light will indicat e low/no flow status.

Figure 11. ifm efector flow sensing device terminal

connection

NOTICE:

Proof of Flow Switch!

Evaporator and condenser water circuits require proof
of flow switches.

• Failure to include the proof of flow devices and/or
jumping out these devices could cause the unit to
stop on a secondary level of protection.

Note: Graphic lab els (sho wn above) are used for CE

application onl y .

Important:

• Before servicing, disconnect all power sources and

allow at least 30 minutes for capacitors to discharg e.

• All electrical enclosures—unit or remote—are IP2X.

5. Apply power to the chiller control panel to verify the
Flow Control Monitor has power and the Low Volt
Broken Wire Re lay light is not lit .

6. Remove all air from the piping circuit prior to adjusting
the low water flow setpoint.

7. Reduce the water flow to the minimum allowable flow
and adjust the Flow setting on the Flow Control
Monitor (see item labeled “ 7” in
the “ Flow” potentiometer clockw ise (+) reduces the

Figure 11). Adjusting

• Frequent cycling on these higher level diagnostic
devices could c ause excessive thermal and pressure
cycling of unit components (O-rings, gaskets,
sensors, motors, controls, etc.) and/or freeze
damage, resulting in premature failure of the chiller.

Failure to provide flow switches or jumping-out of
switches could result in severe equipment damage.

Evaporator and condenser proof of flow switches are
required. These switches are u sed with control logic to
confirm flow prior to starting a unit and to stop a running
unit if flow is lost. For trouble shooting, a viewable
diagnostic is generated if a proof of flow switch does not
close when flow is required.

24 CVHH-SVX001A-EN

Installation: Water Piping

44

445

5

3

3

7

2

21

9

6

2

2

8

Ou tlet

Inlet

1

2

3

45678

9

2

34

445

2

2

10

Outlet

Inlet

Evaporator and Condenser Water
Piping

Figure 12 and Figure 13, p. 25 illustrate the recommended

(typical) water piping arr angements for the evaporator
and condenser.

Figure 12. Typical evaporator water piping circuit

1. Balancing Valve

2. Gate (Iso lation) Valv e or Ball
Valve

3. Thermometer (if field supplied)

4. Waterbox Nozzle Connection

5. Drain, Vent, Anode

(a) Flow switch 4B4 may be installed in either the entering or leaving leg

of the chilled wat er circuit.

(b) It is recom mended to pipe the gauge between entering and leavin g

pipes. A shutoff valve on each side of the gauge allows the operator to
read either entering or leaving water pressure.

Figure 13. Typical c o nd en ser water piping circuits

1. Balancing Valve

2. Gate (Iso lation) Valv e or Ball
Valve

3. Thermometer (if field supplied)

4. Waterbox Nozzle Connection

5. Drain, Vent, Anode

Notes:
1 . Som e type of field-supplied temperature control device may be

required to regulate the temperat ure of the heat-recovery condenser
water circuit . For application recom mendations, refer to Heat
Recovery Sem inar ( Part 2): "Systems/Equipm ent (AM- FND-8).

2 . Install a bypass valve system to avoid circulating water through the

auxiliary shell when the unit is shut down.

3 . On m ultiple pass condensers, entering condenser water must ent er at

the lowest nozzle.

(a) Flow switch 4B5 may be installed in either the entering or leaving leg

of the water circuit.

(b) It is recomm ended to pipe a single gauge bet ween entering and leaving

pipes.

CVHH-SVX001A-EN 25

6. Strainer

7. Chilled Water Flow Switch

8. P ump

9. Pressure Gauge

6. Strainer

7. Condenser Water Flow
Switch (4B5)

8. 3-Way Valve (Optional)

9. Condenser Water Pump

10. Pressur e Gauge

(4B4)

Piping must be arranged and supported to avoid stress on
the equipment. It is strongly recommended that the piping
contractor does not run pipe closer than 0.91 meters
(3 feet) minimum to the equipment. This will allow for
proper fit upon arrival of the unit at t he jo b site. Any
adjustment that is necessary can be made to the piping at
that time. Expenses that result from a failure to follow this
recommendation will not be paid b y Trane.

Water piping connection sizes and components are
identified in

Table 4, p . 26 and Table 5, p. 27. Remember

that with many waterboxes the entering and leaving
evaporator water can be piped to either waterbox
connection when the tube bundles are split vertically.
However, large evaporator waterboxes, with entering and
leaving connections not at the same level, must be
connected with the entering water at the bottom and the
leaving water at the top.

Waterboxes with multip le pass arrangements uti lize a
baffle to separate the passes. These baffles are designed
for a maximum pressure of 137.9 kPad (20 psid). If larger
pressure drops are expected in the application, contact

(a)

(b)

your local Trane repr esentative to discuss special
waterbox options.

Impor tant: Water flows must be pi ped i n accordance

with nameplate designation.

Field-provided isolation valves for the evaporator and
condenser water lines should be installed upstream and
downstream of the heat exchangers, and be installed far
enough away from the chiller to also provide practical
service isol ation for flow sensing devices, field
thermometers, flexible connectors, and any removable
pipe spools.

Ensure that the evaporator water piping is clear, check it
after the chilled water pump is operated but before initial
chiller start-up. If any partial blockages exist, they can be
detected and removed to prevent possible tube damage
resulting from evaporator freeze-up or erosion.

For condenser and large evaporator connections, arrange
the water piping so that the water supply enters the shell
at the lower connection, and exits from the top connection.
Operation al problems may result if this piping is n ot
correct. Some shells may be piped as desired since both
connections are at the same level.

(a)

For applications th at include an “ infinite source” or
“ multiple-use”, cooling condenser water supply, install a
valved bypass “ leg” (optional) between the supply and

(b)

return pi pes. This valved bypass allows the operator to
short-cir cuit water flow through the cooling condenser
when the supply water temperature is too low.

Note: System refrig erant pressure differential must be

maintained ab ove 20.7 kPad (3 psid) at all times.
Fa ilure to do so could result in operating problems.

Installation: Water Piping

Water Piping Connections

All standard units use grooved-pipe connections. These
are grooved-end NSP (Victaulic style) pipe connections.
Flanged connections are optional.

Piping joined using grooved type couplings, like all types
of piping systems, requires proper support to carry the
weight of pipes and equipmen t. The support methods
used must eliminate undue stresses on joints, piping and
other components; allow movement where required, and
provide for any other special requirements (i.e., drainage,
etc.).

Note: Plug-type sensor extension cables are available for

purchase from Trane P arts Service if needed. These
sensor extension cables may be necessary if the
waterboxes are changed or if the temperature
sensors are moved out into the unit pip ing for
better mixed temperature readings.

Table 4. Water connection pipe sizes

Wat er

Passes

Evaporator Metri c Pipe Size ( m m )

1 Pass DN3 00 DN300 DN350 DN400 DN500 DN400 DN500
2 Pass DN250 DN250 DN300 DN350 DN350 — —
3 Pass DN200 DN200 DN250 DN300 DN300 — —

Condenser

1 Pass DN300 DN350 — DN400 DN600 — DN600
2 Pass DN250 DN300 — DN350 DN350 — —

Evaporator Nom inal Pipe Size ( in.)

1 Pass 12 12 14 16 20 16 20
2 Pass 10 10 12 14 14 — —
3 Pass 8 8 10 12 12 — —

Condenser

1 Pass 12 14 — 16 24 — 24
2 Pass 10 12 — 14 14 — —

10 0 13 0 160 20 0 220 40 0 4 4 0

Shell Size

Figure 14. Typical grooved pipe connection

Waterbox L ocations

26 CVHH-SVX001A-EN

NOTICE:

Do Not Exchange Positions of Heat
Recovery Waterboxes!

Failure to follow this instruction could prevent proper
unit operation. Contact CenTraVac Technical Service for
switching of heat recovery waterboxes.

If necessary, the non-marine-style waterboxes on each
shell whether evaporator o r condenser can be switched
end-fo r-end to obtain the desired piping arrangement.

If removal of waterboxes is necessary, refer to

Removal and Installation,” p. 98

.

If the waterboxes on any of the shells are exchanged end­for-end, be sure to reinstall them right side up to maintain
the correct baffle arrangements. Use a new gasket with
each waterbox cover.

“ Waterbox

Installation: Water Piping

Water Box

Flange Adaptor
Trane Provided

Flanged

Wat erbox

Flange Adaptor
Tra n e prov ided

Water Box

Style 77 Flexible

Customer Provided

Customer

Victaulic

Wat erbox

Style 77 Flexible

Customer provided

Customer

Three-pass waterboxes have lifting lugs on the top and
bottom. When reinstalling, ensure that the waterbox is
oriented the same way it as removed.

Grooved Pipe Coupling

A customer-supplied, standard flexible groo ved pipe
coupling (Victaulic Style 77 or equivalent) should be used
to complete the Victaulic connection for both 1034.2 kPag
or 150 psig and 2068.4 kPag or 300 psig waterboxes.

When a flexible coupling such as this is installed at the
waterbox connections, other flexible piping connectors
(i.e., braided-steel, elastomeric arch, etc.) are usually not
required to attenuate vibration and/or prevent stress on
the connections.

Table 5. Water piping connection components

Custom er Piping Connection

Unit Model

CVHH

CVHH Victaulic (All others)

Figure 15. Customer piping connection types

• Refer to the coupling manufacturer’s guidelines for
specific information concerning proper piping system
design and construction methods for grooved water
piping systems.

• Flexible coupling gaskets require proper lubrication
before installation to provide a good seal. Refer to the
coupling manufacturer’s guidelines for proper
lubricant type and application.

Flange-Connection Adapters

When flat-face flange connections are specified, flange-to­groove adapters are provided (Victaulic Style 741 for

1034.2 kPag or 150 psig systems; Style 743 for 2068.4 kPag

or 300 psig systems). The adapters are shipped bolted to
one of the chi ller end-supports. A dapter descripti ons are

Unit Connection

Type Victaulic Flanged

Flanged (Condenser

032–050 150 psig

[103 4.2 kPag] non-

marine only)

Customer

provided

Victaulic coupling

No adapter

required

Trane provided

Victaulic-to-

flang e adapter

given in

Table 6, p . 28 and Table 7, p. 28. The flange

adapters provide a direct, rigid connection of flanged
components to the grooved-pipe chiller waterbox
connections.

Figure 16. Typical shipping location for flange

In this case, the use of flexible type connecto rs (i.e.,
braided steel, elastomeric arch, etc.) are recommended to
attenuate vibration and prevent stress at the waterbox
connections. Flange adapter s are no t provided for CVHH
units with 2068.4 kPa or 300 psig waterboxes that hav e
356 mm (14 in.) and larger piping connections.

All flange-to-flange assembly bolts must be provided by
the installer. Bolt sizes and number required are given in

Table 6, p. 28 and Table 7, p. 28. The four draw-bolts

needed for the 355.6 mm (14 in.) and larger Style 741
(1034.2 kPag or 150 psig) adapters are provided. The
Style 741, 1034.2 kPag or 150 psig flange adapter requires
a smooth, hard surface for a good seal.

Connection to other type flange faces (i.e., raised, serrated,
rubber, etc.) will require the use of a flange washer
between the faces. Refer to the flange adapter
manufacturer’s guidelines for specific information.

The Style 743 (2068.4 kPa or 300 psig) flange adapters are
designed to mate with raised-face flanges. They can be
used with flat-faced flanges; however, only if t he raised
projections on the outside face of the adapter are
removed; see

Figure 17. The flange-adapter gasket must

be placed with the color-coded lip on the pipe and the other
lip facing the mating flange.

NOTICE:

Piping Connection Leaks!

Failure to provide effective seal could result in
equipment or property-only damage. To provide
effective s eal, gasket contact surfaces of adapter must
be free of gouges, undulations or deformities.

CVHH-SVX001A-EN 27

Installation: Water Piping

Remove to mate
to flat-faced
flanges

Figure 17. Modifying 300 psig or 21 bar flange adaptors

Figure 18. Typical Victaulic flange gasket configuration

for flat-faced flange application

3. Align and bring two pipe ends together and slide

Victaulic Gasket Installation

gasket into position centered between the grooves on
each pipe. No portion of the gasket should extend into

1. Inspect supplied gasket to b e cert ain it is suited for
intended service (code identifies gasket grade). Apply
a thin coat of silicone lubricant to gasket tips and
outside of gasket.

2. Install gasket, placing gasket over pipe end and making
sure gasket lip does not overh ang pipe end. Refer to

Figure 18 f or gasket configuration.

the groove on either pipe.

4. Open fully and place hinged Victaulic flange around
the grooved pipe end with the circular key section
locating into the groove.

5. Insert a standard bolt through the mating holes of the
Victaulic flange to secure the flange firmly i n the
groove.

6. Tighten fasteners alternately and equally until housing
bolt pads are firmly together (metal to metal); refer to

“ Bolt-Tightening Sequence for Water Piping
Connections,” p. 29

. Do not excessivel y tighten

fasteners.

Note: Uneven tightening may cause gasket to pinch.

Table 6. Installation data for 150 psig flange adapters (Style 741)

Nominal Pipe Size

As sem bly Bolt

mm in. in. mm in. kg lb

200 8 3/ 4 x 3-1/2 8 298 11.75 7.5 16.6
250 10 7/8 x 4 12 362 14.25 11 24.2
300 12 7/8 x 4 12 432 17 21.2 46.8
350 14 1 x 4-1/ 2 12 476 18.75 28.1 62
400 16 1 x 4-1/ 2 16 540 21.25 35.8 79
450 18 1-1/ 8 x 4-3/ 4 16 578 22.75 37.3 82.3
500 20 1-1/ 8 x 5-1/ 4 20 635 25 46.9 103.3
600 24 1-1/ 4 x 5-3/ 4 20 749 29.5 64.4 142

(a) Bolt size for conventional flange to flange connect ion. Longer bolts are required when flange washer m ust be used.

Size

( a )

Number of

Assem bly Bolts

Required

Bolt Pattern Diam eter Weight

Table 7. Installation data for 350 psig flange adapters (Style 743)

Nominal Pipe Size

mm in. in. mm in. kg lb

219.1 8 3/ 4 x 4-3/ 4 12 330 13 15.6 34.3

273.0 10 1 x 5-1/ 4 16 387 15.25 21.9 48.3

323.9 12 1-1/ 8 x 5-3/ 4 16 451 17.75 32. 0 70.5

(a) Bolt size for conventional flange to flange connect ion. Longer bolts are required when flange washer m ust be used.

Assem bly Bolt

Size

( a)

Number of

As sem bly Bolts

Required

Bolt Pattern Diam eter Weight

28 CVHH-SVX001A-EN

Bolt-Tightening Sequence for

1

3

45

7

8

26

8 bolt flange

1

3

4

10 11

9

5

7

8

12

26

12 bolt flange

1

1

5

5

9

9

20

22

3

3

4

4

66

7

7

8

8

10

10

19

18

17

16

16

15

15

14

14

13

13

12

12

11

11

16 bolt flan ge 20 bolt flan ge

Water Piping Connections

This section describes a bolt-tightening sequence for
flanges with flat gaskets or O-rings. Remember that
improperly tightened flanges may leak.

No te: Before tightening any of the bolts, align the flanges.

Flanges with 8 or 12 Bolts

Tighten all bolts to a snug tightness, following the
numerical sequence for the appropriate bolt pattern as
shown below. Repeat this sequence to apply the final
torque to each bolt.

Installation: Water Piping

Flanges with 16 or 20 Bolts

Tighten only the first half of the total number of bolts to a
snug tightness, following the numerical sequence for the
appr opriate bolt pattern as shown below. Nex t,
sequentially tighten the remaining half of the bolts in
numerical order.

Pressure Testing Waterside Piping

NOTICE:

E quipment Damage!

Failure to follow these instructions could result in
equipment damage. Do not over pressurize the system
or exceed design pressure. Always perform as a hydro

pressure test with water present in piping and
waterboxes.

Waterside design pressure is either 1034.2 or 2068.4 kP ag
(150 or 300 psig); refer to unit nameplate or to submittal
documentation.

CVHH-SVX001A-EN 29

Vent Piping

Refrigerant Vent Line

General Requirements

State and local codes, and ASHRAE Standard 15 contain
requirements for venting the relief device on the chiller to
the atmosphere outside of the building. These
requirements include, but are not limited to, permitted
mat erials, sizing, and pro per termination.

No te: The following information is a general outline of

vent-line installation requirements based on
ASHRAE Standard 15. Most codes contain similar
requirements but may vary in some significant
areas. The i nstaller must check state and local
codes and follow the specific requirements
applicable to the location.

Purge Discharge

To comply with ASHRAE Standard 15, the discharge
piping from purge units that remove noncondensible gas
from refrigerating systems must conform to the ASHRAE
Standard 15 requirements for relief piping. To h elp meet
this requirement, the purge discharge is factory-piped to
the relief device assembly.

Vent Line Materials

All materials in the relief device vent system must be
compatible with the refrigerant in use. Commonly used
and accepted p iping materials include steel and DWV
(drain/ waste/vent) copper. Consult local codes for
restrictions on materials. Consult with the manufacturers
of any field-provided components or materials for
acceptable material compatibility.

No te: PVC piping is acceptable for use as a v ent line

material with R-1233
the sections of plastic pipe may not be. When
considering a v ent system constructed of plastic
piping, such as PVC, ensure that both the pipe
material and the adhesive have been tested for
refrigerant compatibility. In addition, verify that the
local codes permit PVC for refrigerant vent lines;
even though ASHRAE Standard 15 doesn’t prohibit
its use, some local codes do.

The following materials for PVC pipe construction are
recommended for use with R-1233

Primer/Cleaner:

• Hercules—PVC Primer #60-465

• RECTORSEAL

Adhesives:

• Hercules—Clear PVC, Medium Body/Medium Set,
#60-020

• RECTORSEAL—PVC Cement, Gene™ 404L

®

PV C Cleaner—Sam™ CL-3L

(E), but the glue that joins

zd

(E):

zd

Vent Line Sizing

Vent line size must conform to lo cal codes and
requirements. In most cases, local codes are based on
ASHRAE Standard 15. ASHRAE Standard 15 provides
specific requirements for the discharge piping that allows
pressure-relief devices to safely vent refrigerant to the
atmosphere if over pressurization occurs. In part, the
standard mandates that:

• The minimum pipe size of the vent line must equal the
size of the discharge connection on the pressure-relief
device. A larger vent line size may be necessary,
depending on the length of the run.

• T wo or more relief devices can be piped together only
if the vent line is sized to handle all devices that could
relieve at the same time.

• When two or more relief devices share a common vent
line, the shared line must equal or exceed the sum of
the outlet areas of all upstream relief devices,
depending on the resulting back pressure.

ASHRAE Standard 15 provides guidance for determining
the maximum vent line length. It also provides the
equation (shown in
properly size the vent line at the outlet of a pressure-relief
device or fusible plug.

The equation accounts for the relationship between pipe
diameter, equivalen t pipe len gth, and the pr essure
difference bet ween the vent line inlet and outlet to help
ensure that the vent line syst em provides sufficient flow
capacity.

Table 8, p. 35 provides additional information based on

ASHRAE Standard 15, including:

• Capacities of various vent line sizes and l engths.
However, this data applies only to conventional
pressure-relief valves and NOT to balanced relief
valves, rupture members (as used on Trane
centrifu gal chill ers), fusible plugs, or pilot-operated
valves.

• A simplified meth od to determine the appropriate
vent-line size, with
with the total C value, read across to a pipe curve and
down to find the maximum allowable length for that
size pipe.

To determine the total C value for a specific unit, add
the appropriate C values for the evaporator, standard
condenser, and economizer. If the unit is equipped with
any options (e.g., heat recovery, free cooling, or an
auxiliary condenser), add the applicable C value(s) for
those options to the total as well.

Note:

Table 8, p. 35 and Figure 23, p. 36 are applicable

only for non-manifolded vent-line runs connected
to a 344.7 kPa (50 psi) rupture disk relief device. The
pipe length provided by the table is in “equivalent
feet.” The vent-line length in equivalent feet is the

Figure 23, p. 36) and data necessary to

®

Figure 23, p. 36. Enter the figure

30 CVHH-SVX001A-EN