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
1
Bracket; Purge mounting
2
2
Screw; 0.25-20 x 1.00 thd rolling
4
3
Module; DynaView
1
X
4
Bracket; Human Interface mtg
1
X
5
Nut; 8-32 hex lock
4
X
6
Bushing; 0.75 ID x 1.00 OD snap
1
X
7
Cable; 4 stranded
1
X
8
Bracket; Human Interface unit
mtg
1
X
9
Screw; 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 x 0.50 thd rolling
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
