Trane EarthWise Purge - General Purge Operation; Purge Mounting Location; Equipment Damage Warning

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 oper
ation 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 t
o “Auxiliary
Condenser and Heat Recovery Units,” p. 16” section in this
manual.
Im
portant: For proper purge u
nit 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 precau
tion 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)