Trane PRGD series, Installation, Operation And Maintenance Manual

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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.
W WA AR RN NIIN NG G
R Re effrriig ge erra an ntt u un nd de err H Hiig gh h P Prre essssu urre e!!
F Fa aiillu urre e tto o ffo ollllo ow w iin nssttrru uccttiio on nss b be ello ow w cco ou ulld d rre essu ulltt iin n
a an n e ex xp pllo ossiio on n w wh hiicch h cco ou ulld d rre essu ulltt iin n d de ea atth h o orr
sse erriio ou uss iin njju urry y o orr e eq qu uiip pm me en ntt d da am ma ag ge e..
S Sy ysstte em m cco on ntta aiin nss o oiill a an nd d rre effrriig ge erra an ntt u un nd de err h hiig gh h
p prre essssu urre e.. R Re ecco ov ve err rre effrriig ge erra an ntt tto o rre elliie ev ve e p prre essssu urre e
b be effo orre e o op pe en niin ng g tth he e ssy ysstte em m.. S Se ee e u un niitt n na am me ep plla atte e ffo orr
rre effrriig ge erra an ntt tty yp pe e.. D Do o n no ott u usse e n no on n--a ap pp prro ov ve ed d
rre effrriig ge erra an nttss,, rre effrriig ge erra an ntt ssu ub bssttiittu utte ess,, o orr rre effrriig ge erra an ntt
a ad dd diittiiv ve ess..
W WA AR RN NIIN NG G
H Ha azza arrd do ou uss V Vo olltta ag ge e!!
F Fa aiillu urre e tto o d diisscco on nn ne ecctt p po ow we err b be effo orre e sse errv viicciin ng g cco ou ulld d
rre essu ulltt iin n d de ea atth h o orr sse erriio ou uss iin njju urry y..
D Diisscco on nn ne ecctt a allll e elle eccttrriicc p po ow we err,, iin nccllu ud diin ng g rre em mo otte e
d diisscco on nn ne eccttss b be effo orre e sse errv viicciin ng g.. F Fo ollllo ow w p prro op pe err
llo occkko ou utt//tta ag go ou utt p prro occe ed du urre ess tto o e en nssu urre e tth he e p po ow we err
cca an n n no ott b be e iin na ad dv ve errtte en nttlly y e en ne errg giizze ed d.. V Ve erriiffy y tth ha att n no o
p po ow we err iiss p prre esse en ntt w wiitth h a a v vo ollttm me ette err..
W WA AR RN NIIN NG G
H Ho ott S Su urrffa acce e!!
F Fa aiillu urre e tto o ffo ollllo ow w iin nssttrru uccttiio on nss b be ello ow w cco ou ulld d rre essu ulltt iin n
sse ev ve erre e b bu urrn nss..
S Su urrffa acce e tte em mp pe erra attu urre ess m ma ay y e ex xcce ee ed d 3 30 00 0°°F F ((1 15 50 0°°C C))..
T To o a av vo oiid d p po ossssiib blle e sskkiin n b bu urrn nss,, sstta ay y cclle ea arr o off tth he esse e
ssu urrffa acce ess.. IIff p po ossssiib blle e,, a allllo ow w ssu urrffa acce ess tto o cco oo oll b be effo orre e
sse errv viicciin ng g.. IIff sse errv viicciin ng g iiss n ne ecce essssa arry y w wh hiille e ssu urrffa acce e
tte em mp pe erra attu urre ess a arre e ssttiillll e elle ev va atte ed d,, y yo ou u M MU US ST T p pu utt o on n
a allll P Pe errsso on na all P Prro otte eccttiiv ve e E Eq qu uiip pm me en ntt ((P PP PE E))..
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.
N No otte e:: 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
S Se ettttiin ng gss button to display the Settings screen.
Touch the P Pu urrg ge e S Se ettttiin ng gss button to display the
Purge Settings screen. Touch P Pu urrg ge e M Mo od de e 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.