Trane EarthWise Purge User manual

EarthWise™ Purge
Installation Instructions
August 2020 PRGF-SVN001B-EN
Model Number PRGF
SAFETY WARNING
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of
heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training.
Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury.
When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are
attached to the equipment.
X39640653040

© 2020 Trane PRGF-SVN001B-EN
Introduction
Read this manual thoroughly before operating or servicing
this unit.
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as
required. Your personal safety and the proper operation of
this machine depend upon the strict observance of these
precautions.
The three types of advisories are defined as follows:
WARNING Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTIONsIndicates a potentially hazardous
situation which, if not avoided, could
result in minor or moderate injury. It
could also be used to alert against
unsafe practices.
NOTICE Indicates a situation that could result in
equipment or property-damage only
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, Chlorine, Fluorine and
Carbon (HCFCs). Not all refrigerants containing these
compounds have the same potential impact to the
environment. Trane advocates the responsible handling of
all refrigerants-including industry replacements for CFCs
and HCFCs such as saturated or unsaturated HFCs and
HCFCs.
Important Responsible Refrigerant
Practices
Trane believes that responsible refrigerant practices are
important to the environment, our customers, and the air
conditioning industry. All technicians who handle
refrigerants must be certified 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 requirements that
must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes.
WARNING
Personal Protective Equipment (PPE)
Required!
Failure to wear proper PPE for the job being undertaken
could result in death or serious injury. Technicians, in
order to protect themselves from potential electrical,
mechanical, and chemical hazards, MUST follow
precautions in this manual and on the tags, stickers,
and labels, as well as the instructions below:
• Before installing/servicing this unit, technicians
MUST put on all PPE required for the work being
undertaken (Examples; cut resistant gloves/sleeves,
butyl gloves, safety glasses, hard hat/bump cap, fall
protection, electrical PPE and arc flash clothing).
ALWAYS refer to appropriate Safety Data Sheets
(SDS) and OSHA guidelines for proper PPE.
• When working with or around hazardous chemicals,
ALWAYSrefer tothe appropriateSDSandOSHA/GHS
(Global Harmonized System of Classification and
Labeling of Chemicals) guidelines for information on
allowable personal exposure levels, proper
respiratory protection and handling instructions.
• If there is a risk of energized electrical contact, arc, or
flash, technicians MUST put on all PPE in accordance
with OSHA, NFPA 70E, or other country-specific
requirements for arc flash protection, PRIOR to
servicing the unit. NEVER PERFORM ANY
SWITCHING, DISCONNECTING, OR VOLTAGE
TESTING WITHOUT PROPER ELECTRICAL PPE AND
ARC FLASH CLOTHING. ENSURE ELECTRICAL
METERS AND EQUIPMENT ARE PROPERLY RATED
FOR INTENDED VOLTAGE.

WARNING
Follow EHS Policies!
Failure to follow instructions below could result in
death or serious injury.
• All Trane personnel must follow the company’s
Environmental, Health and Safety (EHS) policies
when performing work such as hot work, electrical,
fall protection, lockout/tagout, refrigerant handling,
etc. Where local regulations are more stringent than
these policies, those regulations supersede these
policies.
• Non-Trane personnel should always follow local
regulations.
Introduction
PRGF-SVN001B-EN 3
Copyright
This document and the information in it are the property of
Trane, and may not be used or reproduced in whole or in
part without 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.
Trademarks
All trademarks referenced in this document are the
trademarks of their respective owners.
Revision History
• Change to PRGF with R513a refrigerant for the
condensing unit.
• Changes to Chiller RUN Section
• Model Number Description
• Clarification of text in various areas
• Model PRGD
• Incorporate R404a Condensing Unit
• Redesigned Purge Tank
• CH530 Controls
• Automatic Carbon regeneration.
• Updated for Trane Technologies.

4PRGF-SVN001B-EN
Table of Contents
Model Number Description . . . . . . . . . . . . . . . 5
General Information . . . . . . . . . . . . . . . . . . . . . 6
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 6
Purge Nameplate . . . . . . . . . . . . . . . . . . . . . . 6
EarthWise™ Purge Conversion Package . . 7
Conversion Package Contents . . . . . . . . . . 7
Field Provided Items . . . . . . . . . . . . . . . . . 7
Optional Purge Valve Kit . . . . . . . . . . . . . . 7
Conversion Package Inspection . . . . . . . . 7
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Removing Old Purge Unit . . . . . . . . . . . . . . . 9
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . 9
Purge Removal Procedure . . . . . . . . . . . . . . 9
Disconnecting Electrical Connections . . . . 9
Purge Water Connections . . . . . . . . . . . . . 9
Purge Refrigerant Connections . . . . . . . . . 9
Removing Old Purge Unit . . . . . . . . . . . . . 9
EarthWise™ Purge Installation . . . . . . . . . . 9
General . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Purge Mounting Location . . . . . . . . . . . . 10
Mounting Procedure . . . . . . . . . . . . . . . . . . 11
Purge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Human Interface . . . . . . . . . . . . . . . . . . . . 11
Thermal Well . . . . . . . . . . . . . . . . . . . . . . 11
Electrical Connections . . . . . . . . . . . . . . . . . 12
Power Wiring . . . . . . . . . . . . . . . . . . . . . . 12
Chiller RUN Signal . . . . . . . . . . . . . . . . . . 12
Remote Human Interface . . . . . . . . . . . . . 12
Remote Fault Indication . . . . . . . . . . . . . . 15
Refrigerant Line Connections . . . . . . . . . . . 15
General Recommendations . . . . . . . . . . . 15
Purge Vapor Line Construction . . . . . . . . . 15
Carbon Regeneration Line . . . . . . . . . . . . 15
Liquid Return Line . . . . . . . . . . . . . . . . . . 15
Refrigerant Line Installation Procedure . 16
Auxiliary Condenser and Heat Recovery Units
16
Purge Mounting Location . . . . . . . . . . . . 17
Purge Tank Vapor Line . . . . . . . . . . . . . . .17
Purge Liquid Return Line . . . . . . . . . . . . . .17
Purge Exhaust Vent Line . . . . . . . . . . . . . .17
Liquid Refrigerant Separator (Optional) . .17
Package contents: . . . . . . . . . . . . . . . . . . .17
Field provided items: . . . . . . . . . . . . . . . . .17
Mounting Procedure . . . . . . . . . . . . . . . . .17
Refrigerant Line Connections . . . . . . . . . . .18
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . .18

PRGF-SVN001B-EN 5
All standard Trane products are identified
by a multiple character model number
that precisely identifies a particular type
of unit. An explanation, of the
alphanumeric identification codes used
for Trane EarthWise™ purge units, is
provided on this page. Its use will enable
the owner/operator, installing
contractors, and service engineers to
define the operation, components and
options for any specific unit.
P R G F A 1 1 1 A A 0
1 2 3 4 5 6 7 8 9 10 11
Digit 1,2,3 PRG = Purge
Digit 4 – Development Sequence
F = EarthWise purge
Digit 5 – Enclosure Type
A= Standard Enclosure
B= NEMA4 style
C= NEMA4 style with Heresite
Condensing Unit
S= Special*
Digit 6 – Control Options
0= Without Power Supply
1= With Power Supply
Digit 7 – Control Interface
1= Purge Interface
0= Chiller Interface
Digit 8 – Hertz
1= 115/60/1
2= 110/50/1
Digit 9 – Vacuum Pump
A= Standard Vacuum Pump
B= High Vacuum Pump
Digit 10,11 – Design Sequence
A0= 1st Design Sequence
Model Number Description

6PRGF-SVN001B-EN
General Information
Specifications
Performance Specifications
Electrical Power Requirements
Note: Voltage range is +10%, -15%
115 Vac, 60 Hz, 1-Phase, 10.3 Amps
110 Vac, 50 Hz, 1-Phase, 10.3 Amps
Fault Relay Output Rating 120 Vac, 1 Amp
Operating Environment 34° F (1°C) to 110° F (43°C); 5% to 95% relative humidity, non-
condensing
Storage Environment -40° F (-40°C) to 150° F (66°C); 5% to 95% relative humidity, non-
condensing
Mounting
Direct-mounted on condenser shell above liquid-level of highest
condenser.
Optionally mounted below condenser using liquid separator.
Dimensions (Approx.) 25” high (635 mm) x 31 1/2” wide (800 mm) x 23 1/8” deep (587 mm)
with filter drier canister and DynaView installed
Weight 140 lbs. (64 Kg) with filter drier canister installed
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels 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 following instructions: Unless specified otherwise,
disconnect all electrical power including remote
disconnect and discharge all energy storing devices
such as capacitors before servicing. Follow proper
lockout/tagout procedures to ensure the power can not
be inadvertently energized.When necessary to work
with live electrical components, have a qualified
licensed electrician or other individual who has been
trained in handling live electrical components perform
these tasks.
Purge Nameplate
The nameplate is located on the top of the control panel.
Always provide the model number, serial number and
product description information from the nameplate when
making inquiries, or ordering parts or literature for the
purge unit.
Figure 1. Typical purge nameplate
MODEL NO: PRGFA001AA0
SERIAL NO: L18G09795
RATED VOLTAGE;110/50/1, 115/60,1
TOTAL UNIT AMPS:10.3 AMPS
MIN CKT AMPACITY:12.3 AMPS
MAX OVERCURRENT
PROTECTIVE DEVICE:15 AMPS
FACTORY CHARGED:.1.00 LBS OF R513A
DESIGN PRESSURE:HIGH SIDE 335 PSIG
LOW SIDE 175 PSIG
UNIT SUITABLE FOR USE WITH
REFRIGERANTS:R123, R11, R113
SERVICE LITERATURE:PRGF-SVN01A-EN
PRGF-SVX001A-EN
MANUFACTURED UNDER ONE OR MORE OF THE
LISTED U.S. PATENTS OWNED BY
AMERICAN STANDARD INC.: 5,031,410

General Information
PRGF-SVN001B-EN 7
EarthWise™ Purge Conversion
Package
The Trane EarthWise purge conversion package is
designed for application on low-pressure centrifugal
chillers, whether electrically or pneumatically controlled.
Note: The EarthWise purge is not designed to be applied
to air-cooled chillers.
Conversion Package Contents
Each EarthWise purge conversion “kit” includes the items
shown in Figures 3 through 5 as well as the items
described below that are field provided.
Field Provided Items
In addition to the factory provided components in the
conversion kit, the items listed below must be provided by
the installer:
• Custom brackets (if needed) to mount purge on
condenser
• Electrical conduit and inter-connection wiring (if
needed)
•Miscellaneous electrical connectors
• 1/4” copper refrigerant tubing
• 3/8” copper refrigerant tubing
• 5/8” copper refrigerant tubing
• Copper couplings, flare nuts, and tees
• 5/8” OD ball valve (required for units with heat
recovery or auxiliary condensers only)
• Insulation for 5/8” vapor line
• 3/8” black nylon tubing for line to outside vent
• Evaporator shut off valve for 1/4” regeneration line
• Thermal grease
• See optional purge valve kit (below) for other field
provided items
• Insulation as required
Optional Purge Valve Kit
The following items are sold as a recommended option.
All of the parts listed below must be compatible with R-
123, R-11, and R-113.
Note: If the optional purge valve kit is not purchased,
these parts must be field provided.
• 1/4” NPS tee
• 1/4” C ball valve
• 1/4” coupling
• 3/8” NPS tee
• 3/8” C ball valve
• 3/8” coupling
• 7/8” ftg x 5/8” C bushing
• 7/8” ftg x 7/8” elbow
• Coupling
• 5/8” C x 1.2" NPTE adapter
• 1/2” NPS elbow
• 5/8” ODS ball valve
Conversion Package Inspection
Before installing the new purge, compare the data on the
purge nameplate with the corresponding ordering and
shipping information to verify that the proper conversion
package was shipped.
If a thorough inspection of the conversion package reveals
damage or material shortages, file a claim with the carrier
immediately. Specify the extent and type of damage
found, and notify the appropriate Trane sales office.
Do not install a damaged purge unit without the Trane
sales representative’s approval!
Note: The purge’s sealed refrigeration system can be
easily bench tested through temporary connection
of 110 Vac power to the purge at the time of
inspection. See the unit wiring diagram for
connection points.
Table 1. Description of contents in purge conversion kit
(some components for units ordered with
human interface only)
Number Description Qty Only in
Units with
Human
Interface
1Bracket; Purge mounting 2
2Screw; 0.25-20 x 1.00 thd rolling 4
3Module; DynaView 1 X
4Bracket; Human Interface mtg 1 X
5Nut; 8-32 hex lock 4 X
6Bushing; 0.75 ID x 1.00 OD snap 1 X
7Cable; 4 stranded 1 X
8Bracket; Human Interface unit
mtg 1 X
9Screw; 0.25-20 x 0.50 thd rolling 2 X
10 Insulation; 3” x 5” temperature
well 2 X
11 Knobs; 0.31-18 with studs 2 X
12 Screw; 8-32 x 2.0 (attached to
DynaView)4 X
13 Cable Connector; (attached to
DynaView)1 X
14 Filter Drier 1
17 Screw;0.25-20 x0.50 thdrolling 2
19 Seal; 0.38 O-ring face 2
21 Sight Glass 1
22 O-ring (attached to filter drier) 2
23 Tube; 0.375 OD 1

Figure 2. Purge mounting
Figure 3. Human interface mounting (units ordered
with human interface only)
Figure 4. Filter drier assembly
General Information
8PRGF-SVN001B-EN
2
11
3
7
12
5
1113
6
10 9
8
4
21
17
19
22
14
23

PRGF-SVN001B-EN 9
Installation
Removing Old Purge Unit
Replacing an existing purge unit with the new EarthWise™
purge requires that the existing purge system be
disconnected and removed from the chiller. To be certain
that the retrofit procedure is performed properly, carefully
review the instructions in this section.
WARNING
Explosion Hazard and Deadly Gases!
Failure to follow all proper safe refrigerant handling
practices could result in death or serious injury. Never
solder, braze or weld on refrigerant lines or any unit
components that are above atmospheric pressure or
where refrigerant may be present. Always remove
refrigerant by following the guidelines established by
the EPA Federal Clean Air Act or other state or local
codes as appropriate. After refrigerant removal, use dry
nitrogen to bring system back to atmospheric pressure
before opening system for repairs. Mixtures of
refrigerants and air under pressure may become
combustible in the presence of an ignition source
leading to an explosion. Excessive heat from soldering,
brazing or welding with refrigerant vapors present can
form highly toxic gases and extremely corrosive acids.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized. Verify that
no power is present with a voltmeter.
Preparation
Before actual removal of the old purge system can begin,
perform the following procedures to prepare the unit for
the removal procedure.
1. Shut the chiller down and disconnect all electrical
power.
2. Remove refrigerant charge from the chiller.
3. Evacuate the chiller to 4 mm Hg (0.53 kPa) to remove all
refrigerant vapor.
4. Pressurize chiller with dry nitrogen until the evaporator
pressure gauge indicates 0 psig.
5. Close the angle valve on thecondenser to isolate the
purge tank refrigerant inlet line.
6. Close the angle valve on the evaporator (if present) to
isolate the purge tank liquid return line or carbon tank
regeneration.
Purge Removal Procedure
Disconnecting Electrical Connections
Disconnect all electrical connections at the connection
points provided in the existing purge unit control panel
and in the chiller control panel.
Purge Water Connections
Disconnect the existing water supply and return lines to
the purge tank (if applicable). These lines may be capped
off or dismantled since the EarthWise™ purge system
does not require water connections.
Purge Refrigerant Connections
1. Disconnect and remove the existing vapor line (if not 5/
8”) from the unit condenser to the purge compressor
inlet. This line will be replaced with a 5/8” line from the
condenser to the new purge tank inlet connection
during the purge installation procedure.
2. Remove the existing 1/2” shutoff valve (if present)
from the fitting on the condenser shell. This valve will
be replaced during the purge installation procedure.
3. Disconnect the 1/4” copper liquid return line from the
purge tank to the shutoff valve on the evaporator or
condenser (if present). The liquid return line must be 3/
8”.
Note: The 1/4” line may be reused for the carbon
regeneration line if the length is sufficient.)
4. Remove the shutoff valve from the evaporator or
condenser if it is not 3/8” or larger.
Removing Old Purge Unit
Usually, the existing purge unit is mounted on an integral
base located on the upper surface of one of the unit
condensers. Unbolt the base from its mounting brackets
and remove the purge unit from its mounting location.
CAUTION
Heavy Objects!
Proper lifting equipment must be present to remove the
existing purge and mount the EarthWise™ purge. Use
of a step ladder may be necessary. Failure to follow
these safety procedures may result in minor injury or
equipment damage.
EarthWise™ Purge Installation
Replacing an existing older model purge unit with the
EarthWise purge requires a number of wiring and
hardware changes. To insure that the EarthWise purge
retrofit procedure is performed properly, carefully review
the instructions in this section.

Installation
10 PRGF-SVN001B-EN
Important: Record a detailed description of changes
made during the purge retrofit process. Be
sure to add a copy of this report to the
permanent chiller record for future
reference.
General
The EarthWise purge is designed to be adapted for use on
low-pressure centrifugal water chillers. In order to insure
proper purge unit operation, the pressure differential
between the purge condensing tank and the chiller
condenser must be kept to a minimum. If this differential
is too high due to flow restrictions or liquid buildup on the
purge unit suction side, the purge tank will not drain
properly.
Purge Mounting Location
The purge assembly must be mounted above the liquid
level of the chiller’s highest condenser. A liquid refrigerant
separator may be necessary if the purge needs to be
mounted below the chiller’s condenser liquid level (refer to
the “Liquid Refrigerant Separator (Optional)"section in
this manual). For proper operation of the gravity liquid
return, a minimum pressure drop must exist between the
chiller condenser and the purge (Refer to “Purge Vapor
Line Construction,” p. 15”). If the unit is equipped with a
heat recovery or an auxiliary condenser, refer to “Auxiliary
Condenser and Heat Recovery Units,” p. 16” section in this
manual.
Important: For proper purge unit operation, the chiller
condenser purge gas connection must
include the 5/8” ball valve. Any liquid that
forms in the 5/8” line must run back to the
condenser or an external line heater must
be installed on the 5/8” line near the
condenser shell to boil off any accumulated
refrigerant.
CAUTION
Equipment Damage!
The EarthWise purge unit must be configured to
accommodate R-11 refrigerant through the DynaView
when used with an R-11 chiller. Refer to the “Human
Interface,” p. 11 section of this manual. Failure to follow
this safety precaution could result in equipment-only
damage.
Figure 5. Typical unit top dimensions and layout
Figure 6. Typical unit front dimensions and layout
6 1/4”
(158.75 mm)
24 1/4”
(615.95 mm)
26 1/2”
(673.10 mm)
14 3/4”
(374.65 mm)
24 3/4”
(628.65 mm)
8”
(203.20 mm)
11 3/4”
(298.45 mm)
31 1/8”
(790.58 mm)
3 3/8”
(86.88 mm)

Installation
PRGF-SVN001B-EN 11
Mounting Procedure
CAUTION
Heavy Objects!
Proper lifting equipment must be present to remove the
existing purge and mount the EarthWise™ purge. Use
of a step ladder may be necessary. Failure to follow
these safety procedures may result in minor injury or
equipment damage.
Purge
The EarthWise purge unit is mounted on an integral base
as shipped. Mount the purge unit on the mounting
brackets, using four (4) 1/4-20 thread-forming screws
(brackets and screws provided in conversion kit).
Position the purge assembly at the proper mounting
location and weld the brackets to the upper surface of the
chiller’s highest condenser.
Note: If the mounting brackets provided in the
conversion kit cannot be used, it will be necessary
to fabricate custom brackets to mount the purge on
the condenser.
Important: Always check chiller model number and
condenser nameplate to determine if
condenser is an ASME-coded vessel. If it is,
all applicable ASME and local codes
concerning repairs to coded vessels must
be observed.
Human Interface
The human interface ships separate from the purge unit. It
can be removed and relocated elsewhere on the chiller or
to another convenient location near the chiller. See
Figure 7.
The Aftermarket purge requires the refrigerant type to be
set manually through the human interface (DynaView).
To change the refrigerant type in the human interface
(DynaView), follow the steps below:
1. Select the “Settings” tab.
2. Select “Purge” from the menu.
3. Select “Refrigerant Type” from the menu.
4. Choose the correct refrigerant for your chiller.
5. Return to the previous menu and verify that the correct
refrigerant is shown for refrigerant type.
CAUTION
Equipment Damage!
The EarthWise purge unit must be configured to
accommodate R-11 refrigerant through the DynaView
when used with an R-11 chiller. Refer to the Human
Interface section of this manual. Failure to follow this
safety precaution could result in equipment-only
damage.
Figure 7. Filter drier canister mounting connections/
human interface
Thermal Well
The liquid return line temperature does not ship with the
temperature probe inserted into the well. The probe must
be inserted into the well. Be sure that there is adequate
thermal grease in the well.
White
Green
Black
Red
Sight Glass to have
is Downward Slope

Installation
12 PRGF-SVN001B-EN
Electrical Connections
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized. Verify that
no power is present with a voltmeter.
Electrical wiring for the EarthWise™ purge unit requires
that four power connections be made to the chiller control
system; two connections for power from the chiller control
panel and one from the chiller RUN signal.
Electrical requirements are:
• 115 Vac, 60 Hz, 1-Phase, 10.3 Amps.
• 110 Vac, 50 Hz, 1-Phase, 10.3 Amps.
Note: Voltage range is +10%, -15%
Note: Use Class 1, 14 AWG copper wire and metal
conduit. All field-installed wiring must comply with
applicable NEC and local electrical codes.
Important: Do not run Purge AC power supply circuit in
same conduit with any low-voltage (<30
Volt) wiring.
Power Wiring
The 115 Vac main hot line should be connected to the fused
purge output or to a similar connection point in the chiller
control panel that previously provided power for the
original purge unit. See Figure 8 and Figure 9.
Use the 7/8” (22 mm) diameter hole on the back side of
purge control panel for 115 Vac power access. Power
supply terminations must be field connected to terminals
3X1-2 (Hot) and 3X1-7 (Neutral) in purge control panel.
Chiller RUN Signal
A 115 Vac chiller run signal must be supplied to 3A6, J2-2
whenever the chiller is running. The Dual High Voltage
Input LLID looks for a 115 Vac potential difference across
J2-2 and J2-1 to indicate the chiller is on. This signal may
be sourced from 3X1-4 and switched using a field-supplied
relay, or this signal may come from the hour meter, start
counter, or similar device that can provide 115 Vac
whenever the chiller is on.
If the Chiller RUN Signal is sourced from 3X1-4, a field-
supplied, normally open relay (5K91) will be required. The
contacts must be wired between 3X1-4 to 3A6, J2-2. The
relay coil must be energized from the chiller control panel
by wiring it in parallel with the hour meter, start counter, or
other similar device that is only energized when the chiller
is operating. The common terminal (3A6-J1) should be
returned to the purge neutral (3X1-8).
Alternatively, a Chiller RUN Signal may be provided to
3A6, J2-2 with a 115 Vac source directly from the hour
meter, start counter, or other device that is powered only
when the chiller is on. The common terminal (3A6, J2-2)
should be returned to the purge neutral, 3X1-8. See
Figure 8.
Remote Human Interface
Guide the DynaView Cable (Item #7 of Figure 3) through
the control panel, Human Interface Bracket, and Bushing
(Items #4 and 6 of Figure 3) before connecting the Cable
Connector (Item #13 of Figure 3). Connect the Cable
Connector as shown in Figure 7.
If the retrofit human interface is remotely mounted from
the purge, factory wiring must be replaced. Maximum
wire length is 25 feet (7.6 m).This is not provided on chillers
that have CH530 or AdaptiView controls.
The purge based human interface is not provided on
chillers with CH530 style controls. For these systems, the
CenTraVac controls provide the interface duties.

Figure 8. EarthWise™ purge field wiring
Installation
PRGF-SVN001B-EN 13
See Figure 9 for a detailed
view

Figure 9. Detailed view of the EarthWise™ purge field wiring
Figure 10. EarthWise™ purge connection diagram
Installation
14 PRGF-SVN001B-EN

Installation
PRGF-SVN001B-EN 15
Remote Fault Indication
A fault condition can be remotely enunciated by
connecting to module 3A3 at J2-12 (common) and J2-10
(normally open) or J2-11 (normally closed). When a fault
indication occurs the contacts change state. Contact rating
is 120 Vac, 1 Amp.
Figure 11. Purge component layout back view
Refrigerant Line Connections
The EarthWise™ purge requires refrigerant connections at
four points:
1. Suction gas connection between purge tank and chiller
condenser;
2. Liquid return connection from purge tank and filter
dryer canister to chiller condenser;
3. Purge carbon tank discharge connection for
connecting a vent line to outdoor atmosphere; and
4. Carbon regeneration line from the carbon tank to the
chiller evaporator.
Refrigerant connection sizes and locations are shown in
Figure 5, Figure 6, and Figure 11.
General Recommendations
There are two major points of concern when installing the
EarthWise purge:
1. To insure that all liquid refrigerant returns to the chiller
condenser under all circumstances, whether the chiller
is running or not; and
2. That the purge gas pickup is connected at the
appropriate point on the condenser shell to move
accumulated air to the purge tank. This point is
typically beneath an internal baffle plate inside the
condenser, which may also involve an internal pickup
tube(s). The original purge pickup point is
recommended.
Purge Vapor Line Construction
Important: Always check the chiller model number and
condenser shell nameplate to determine if it
is an ASME vessel. If it is, all applicable
ASME and local codes concerning repairs to
ASME rated vessels must be followed.
The purge vapor line which runs from the chiller
condenser to the purge tank must be constructed of 5/8”
refrigerant-grade copper tubing and designed for the
lowest possible pressure drop. The vapor line should be
insulated to minimize condensation in the line.
The shutoff valve provided on the chiller, typically an angle
or solenoid valve, must be replaced with the 5/8” ball valve
provided in the optional conversion kit. The valve should
be located as close to the condenser as possible.
Model CVHE and later-vintage CVHB Trane chillers have 1/
2” NPT connections, which can easily be configured for the
5/8” valve. However, Model PCV, CV, OCV, LCV, CVHA and
early CVHB Trane chillers have 3/8” NPT vapor
connections. In these cases, the larger coupling provided
with the kit should be welded over the existing 3/8” NPT
port.
Note: A minimum 1/2” (13 mm) inside diameter must be
maintained throughout the entire vapor line.
Some smaller CFC-113 Model PCV and LCV Trane chillers
have a 1/4” NPT condenser purge connection. In these
cases, the 1/4” coupling must be removed and replaced
with the larger one provided with the new purge.
Carbon Regeneration Line
The 1/4” copper tubing and valve are field supplied and are
not included in the loose parts box. The connection for the
regeneration line to evaporator may be different
depending on which chiller the purge is installed on. The
connection to the evaporator should be above the liquid
line of the evaporator, and must be installed if there is no
existing connection. Maintain a slope for the entire length
of the copper tubing back to the evaporator. The valve for
the regeneration line must be fully open when the system
is in operation.
Other Considerations
• Maintain a minimum of a two-inch per foot (150 mm/
m) slope (pitch) for the entire length of the vapor line
to allow any liquid that may accumulate in the line to
drain back to the condenser.
• Avoid vertical runs over six (6) inches (152 mm).
• Use long-radius bends in the tubing wherever possible
to avoid excessive pressure drop.
• The 5/8” ball valve must be fully open when the system
is in operation.
Liquid Return Line
To obtain proper liquid refrigerant return, the pressures at
the condenser vapor pickup point and at the liquid return
Suction Gas Line
to Condenser
1/4” Carbon Regeneration
Line to Evaporator
3/8” Exhaust Line
to External Vent

Installation
16 PRGF-SVN001B-EN
connection to the condenser must be the same. For this
reason, the vapor and liquid connections should be
located as closely together as possible to avoid problems
which can result from pressure gradients within the
condenser.
Use 3/8” refrigerant-grade copper tubing and pitch the line
at a minimum rate of 2"/ft. (151 mm/m) toward the
condenser. Avoid vertical runs of copper tubing.
On units with internal purge pickup points, the liquid
return should be located close to the corresponding
internal pickup location.
WARNING
Explosion Hazard and Deadly Gases!
Failure to follow all proper safe refrigerant handling
practices could result in death or serious injury. Never
solder, braze or weld on refrigerant lines or any unit
components that are above atmospheric pressure or
where refrigerant may be present. Always remove
refrigerant by following the guidelines established by
the EPA Federal Clean Air Act or other state or local
codes as appropriate. After refrigerant removal, use dry
nitrogen to bring system back to atmospheric pressure
before opening system for repairs. Mixtures of
refrigerants and air under pressure may become
combustible in the presence of an ignition source
leading to an explosion. Excessive heat from soldering,
brazing or welding with refrigerant vapors present can
form highly toxic gases and extremely corrosive acids.
Refrigerant Line Installation Procedure
The following procedure is recommended when making
EarthWise™ purge refrigerant line connections. Refer to
Figure 13.
1. Weld the 7/8” ID machined-steel coupling (for purge
vapor line) to the condenser shell at the appropriate
point on the shell. Be sure to slope properly (refer to
“Purge Vapor Line Construction").
2. Weld the 3/8” pipe coupling (for liquid return line) to
the condenser shell near the gas line outlet connection
(see Step 1 above).
3. Drill a 7/8” (22 mm) hole through the purge vapor line
coupling into the condenser shell.
CAUTION
Tube Damage!
To prevent condenser tube damage, use extreme
caution when enlarging outlet opening.
4. Drill a 3/8” (10 mm) hole through the liquid line
coupling into the condenser shell.
CAUTION
Tube Damage!
Use extreme caution when drilling into condenser to
avoid damage to internal tubes.
5. Braze the 7/8” elbow into the coupling and the 5/8”
reducer into the elbow. Install 5/8” copper tubing and
the 5/8” ball valve. Be certain to maintain proper pitch
to the purge connection point (refer to “Purge Vapor
Line Construction").
6. Install the 3/8” angle valve on the 3/8” liquid return
coupling.
7. Install the factory provided 3/8” liquid line, filter drier
and moisture indicating sight glass as shown in
Figure 7.
Note: The face of the moisture indicating sight glass
should be pointed slightly downward to assure
liquid contact with internal moisture sensor.
8. Install 3/8” copper tubing from the purge to the 3/8”
liquid return angle valve.
Other hardware that may be provided for alternate
installation setups can be used only if careful attention is
paid to the two major points discussed under “General
Recommendations,” p. 15.
In applications where the mechanical room is warm
enough to cause liquid refrigerant in the liquid return line
to boil (causing vapor lock), it is advisable to insulate the
liquid return line. It is also advisable to insulate the liquid
return line for all duplex chillers and chillers with water
flow in series.
Figure 12. EarthWise™ purge gas and liquid lines, for
single condenser chiller
Auxiliary Condenser and Heat
Recovery Units
Important: Be sure to follow all applicable codes when
installing discharge vent line.
When the EarthWise purge system is applied to a heat
recovery unit or a unit with an auxiliary condenser, some
additional considerations must be taken into account.
Purge Tank
12” 2”
Condenser
Purge Gas
Line
5/8” Ball Valve
7/8” Elbow and
5/8” Reducer
7/8” Steel
Coupling
3/8” Angle
Valve
Maintain a Pitch
of 2”/12” (151 mm/m)
or more SIDE VIEW
FRONT VIEW
5/8” Purge
Gas Line
3/8” Liquid
Return Line
Chiller
Condenser

Installation
PRGF-SVN001B-EN 17
Purge Mounting Location
In the case of units with auxiliary or heat recovery
condensers, the purge must be mounted above the liquid
level of the highest condenser.
Purge Tank Vapor Line
The purge gas line must be connected to both the cooling
and auxiliary or heat recovery condensers. Be sure to pitch
properly.
Shutoff valves must be provided at both condensers so the
line can be closed off from the non-operating condenser.
Refer to Figure 13.
Purge Liquid Return Line
The 3/8” liquid return line from the purge tank must be
connected to the auxiliary or the heat recovery condenser
at a point that is below the purge tank outlet connection,
but above the condenser liquid level. Install the standard
3/8” shutoff valve (if not already provided), as previously
described in “Liquid Return Line,” p. 15. Refer to Figure 13.
Purge Exhaust Vent Line
Connect the discharge vent line using 3/8” O.D. black,
nylon, tubing to the connection on the purge exhaust
solenoid valve. The discharge must be at atmospheric
pressure and operate at a minimum pressure drop. A
minimum of a 3/8” line is required. In many cases, this line
will tie into the vent line for the chiller rupture disc.
Figure 13. EarthWise™ purge gas and liquid lines, for
heat recovery or auxiliary condenser units
Liquid Refrigerant Separator
(Optional)
The Liquid Refrigerant Separator allows the EarthWise™
purge to be installed below a chiller’s condenser liquid
level. This may be necessary when space or other
considerations prevent the purge from being installed in
its typical location on top of the condenser. The liquid
refrigerant separator provides the pressure isolation that
is needed to return liquid refrigerant to the evaporator.
Important: The liquid refrigerant separator is not
typically needed when the EarthWise purge
is mounted on top of the chiller condenser
and its refrigerant is returned to the chiller
condenser in the normal prescribed
manner.
Package contents:
Qty Description
1Liquid Refrigerant Separator
21/4-20 x 0.75" screws to mount
Liquid Separator
1Installation Instructions
Field provided items:
• 1/4” copper tubing
• 3/8” copper tubing
• 5/8” copper tubing
• 5/8” copper “T” tee
• Ball valve for evaporator regeneration line
• Connection fittings for the evaporator regeneration
line
Mounting Procedure
Mount the liquid refrigerant separator to the purge base in
the preferred mounting location as shown in Figure 15.
Drill holes into the purge base as necessary or use existing
holes in the purge base.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized. Verify that
no power is present with a voltmeter.
Figure 14. Typical liquid separator installation
Purge Tank
2”
12”
Condenser
Purge Gas
Line
5/8” Ball Valve
7/8” Elbow And
5/8” Reducer
7/8” Steel
Coupling
3/8” Angle
Valve
Maintain a Pitch
of 2”/12” (151 mm/m)
or more
Maintain a Pitch
of 2”/12” (151 mm/m)
or more
SIDE VIEW
FRONT VIEW
5/8” Purge
Gas Line
3/8” Liquid
Return Line
Auxilliary
or Heat
Recovery
Condenser
Standard Chiller
Condenser
7/8” Elbow And
5/8” Reducer
7/8” Steel
Coupling
5/8” Ball
Valve
Liquid
Separator
Purge Suction
Return Line
Chiller
Condenser
Chiller
Evaporator
EarthWise
Purge
Carbon Regeneration
Line Tree
Existing
Purge
Pickup
Existing
Liquid
Line

Installation
18 PRGF-SVN001B-EN
Refrigerant Line Connections
The EarthWise™ purge liquid separator requires three
refrigerant connections:
1. Vapor connection between the purge liquid separator
and the purge suction gas line.
• Install a 5/8” “T” in the purge vapor line which runs
from the chiller condenser to the purge tank (see
Figure 16 ). Install 5/8” copper tubing from the “T” to
the liquid separator. Slope the line to allow any
refrigerant to drain into the liquid separator.
2. Liquid return connection from the liquid separator to
the moisture indication sight glass.
• Install 3/8” copper tubing from purge liquid separator
to the sight glass.
3. Liquid return connection from the liquid separator to
the chiller evaporator.
• Install 3/8” copper tubing from the purge liquid
separator to an access valve on the chiller evaporator.
Maintain a minimum two inch per foot pitch toward the
evaporator.
Maintenance
Routinely check the purge moisture indicating sight glass
and change the filter drier as necessary. It is important to
maintain the chiller’s refrigerant charge in a dry condition.
Figure 15. Liquid separator mounting location
(preferred)
Figure 16. Liquid separator mounting connections
Figure 17. Remote mounting cable and optional bracket
Field Provided Tubing
Carbon Regeneration
Line
Vapor
Connection
5/8”
Liquid Inlet
Connection
1/4” ODF
Solder
Liquid
Return
Connection
3/8” ODF
Field Provided
Tubing
Carbon
Regeneration
Line
Suction Gas
From Chiller
Slope Refrigerant
Line Towards the
Liquid Separator
Drain Valve
(Schrader
Fitting) 1/4”
Flare
5/8” “T”
Use Bracket as a template
Drill 2 holes 0.375
Extreme care must be taken
to avoid Metal Chips from
contaminating Electrical Controls
Cable Length 15 Ft.
Supplied with Lit

©2020 Trane
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notice. We are committed to using environmentally conscious print practices.
Trane - by Trane Technologies (NYSE: TT), a global climate innovator - creates comfortable, energy
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please visit trane.com or tranetechnologies.com.
PRGF-SVN001B-EN 13 Aug 2020
Supersedes PRGF-SVN001A-EN (Nov 2018)