Trane PRGD series - Maintenance; Weekly Maintenance; Replacing the Filter-Drier Assembly

PRGD-SVX01F-EN
25
Maintenance
Maintenance requirements for an EarthWise™ purge
system with Tracer® AdaptiView™ control are
described in this section. To ensure efficient and
reliable purge operation, perform all inspections and
procedures at the prescribed intervals. Keep records of
inspection results to establish proper service intervals.
Document changes that occur in purge activity that
could provide information about chiller performance.
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Weekly Maintenance
Perform the following maintenance procedure on a
weekly basis:
1. With the purge unit operating, check the purge tank
condensing activity by observing the liquid
refrigerant flow in the moisture-indicating sight
glass located in the liquid drain line immediately
after the filter drier canister. A lack of visible
refrigerant flow in the sight glass indicates one of
the following:
a. A pump-out cycle is necessary.
b. A problem exists with the purge heat transfer
circuit (such as the condensing unit, expansion
device, or purge evaporator coil).
c. A problem exists in the purge control
subsystem.
d. Refrigerant vapor from the chiller condenser is
blocked or restricted.
2. Check the moisture-indicator sight glass. Replace
the filter-drier core if moisture is indicated.
NNoottee:: The need for frequent changes of the filter
drier could be an indication of significant
chiller air or tube leaks.
Semi-Annual Maintenance
Perform the following maintenance procedure on a
semi-annual basis:
1. Inspect the air-cooled condenser coil and clean as
needed. Clean the coil from the fan side using
compressed air or coil cleaner. A dirty coil will
reduce purge efficiency and capacity.
2. Inspect the purge tank and carbon tank insulation
for any damage or degradation. Make any needed
repairs to the insulation.
Annual Maintenance
Perform the following maintenance procedure on an
annual basis:
1. Semi-annual maintenance procedures described in
“Semi-Annual Maintenance,” p. 25.
2. Purge system control checks described in
“Troubleshooting,” p. 28.
3. Open the purge control panel and check all internal
components for such problems as corrosion,
terminal tightness, or signs of overheating.
4. Change the filter-drier assembly.
Replacing the Filter-Drier
Assembly
Following are maintenance instructions for filter-drier
assembly replacement; refer to Figure 2, p. 9, for the
location of this component.
1. At the Tracer® AdaptiView™ display, touch the
SSeettttiinnggss button to display the Settings screen.
Touch the PPuurrggee SSeettttiinnggss button to display the
Purge Settings screen. Touch PPuurrggee MMooddee to
display Purge Mode screen. From this screen, set
the mode to Stop.
2. Isolate the purge unit from the chiller. Close the
isolation valves on the purge vapor inlet and the
liquid return lines.