Recommended M aintenance
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Compressor Oil Change
After the first six m onths of accum ulated operation, or
after 1,000 hours operation—w hichever com es first—it is
recom m ended to change the oil filter. It is recom m ended
to subscribe to the Trane annual oil analysis program
rather than autom atically change the oil as part of
scheduled m aintenance. Change the oil only if indicated
by the oil analysis. Use of an oil analysis program w ill
reduce the chiller ’s overall lifetim e waste oil generation
and m inim ize refrigerant em issions. The analysis
determ ines system m oisture content, acid level, and w ear
m etal content; it can be used as a diagnostic tool. Due to
the new refrigerant and oil com bination, the oil analysis
should be perform ed by the Trane Chem ical Laboratory.
In conjunction w ith other diagnostics perform ed by a
qualified service technician, oil analyses can provide
valuable inform ation on the perform ance of the chiller to
help m inim ize operating and m aintenance costs and
m axim ize its operating life. An access valve is installed in
the oil supply line, before the oil filter, for obtaining oil
sam ples.
N ot es:
•
Use only Trane OIL00022. A full oil change is 79.5 L
(21 gallons).
Leak Checking Based on Purge
Pump Out Time
Figure 52
has been developed to aid in determ ining w hen
to do a leak check of a chiller based on the purge pum p out
tim e and unit size. This figure depicts norm al purge pum p-
out tim es, sm all leaks and large leaks based on the chiller
tonnage.
If the purge pum p-out tim e is in the sm all leak region, then
a leak check should be perform ed and all leaks repaired at
the earliest convenience. If the purge pum p-out tim e is in
the large leak region, a thorough leak check of the unit
should be perform ed im m ediately to find and fix the leaks.
Measure t he com pressor m ot or w inding resist ance
t o gr ound; a qualified ser v ice t echnician should
conduct t his check t o ensure t hat t he findings ar e
pr oper ly int er pr et ed. Cont act a qualified ser v ice
or ganizat ion t o leak- t est t he chiller ; t his
pr ocedur e is especially im por t ant if t he sy st em
r equir es fr equent pur ging.
( a) Every t hree years, use a nondest ruct ive t ube t est t o inspect t he condenser and evapor at or t ubes. I t m ay be desirable t o perfor m t ube t est s on t hese
com ponent s at m or e frequent int ervals, depending upon chiller applicat ion. This is especially t r ue of cr it ical pr ocess equipm ent .
( b) Cont act a qualified ser v ice or ganizat ion t o det er m ine w hen t o conduct a com plet e ex am inat ion of t he unit t o discer n t he condit ion of t he com pr essor
and int ernal com ponent s. Check t he follow ing: chronic air leaks ( w hich can cause acidic condit ions in t he com pr essor oil and result in pr em at ur e bear ing
w ear ) and evapor at or or condenser w at er t ube leaks ( w at er m ixed w it h t he com pressor oil can result in bearing pit t ing, corrosion, or ex cessiv e w ear) .
Table 20. Recommended maintenance (continued)
Table 21.
Recommended maintenance of optional features
Fe a t u r e
Ev e r y 3 m on t h s
Ev e r y 6 m on t h s
An n u a lly
Wat erbox Coat ings
I nspect wat er box coat ings wit hin t he
fir st 1–3 m ont hs t o det er m ine a r equir ed
m aint enance schedule for your j ob sit e.
Refer t o
“ Wat er box and Tubesheet
Pr ot ect ive Coat ings,” p. 97
for m or e
infor m at ion.
Wat er box Anodes
I nspect wat er box anodes w it hin t he fir st
1–3 m ont hs t o det er m ine a r equir ed
m aint enance schedule for your j ob sit e.
Refer t o
“ Sacr ificial Anodes,” p. 97
for
m or e infor m at ion.
Gant r ies
Lubr icat e t he gant r ies annually. Use ConocoPhillips
MegaPlex
®
XD3 ( gray in color ) , LPS
®
Mult iPlex Mult i-
Purpose ( blue in color) , or equivalent .
Hinges
Lubricat e t he hinges annually. Use ConocoPhillips
MegaPlex
®
XD3 ( gray in color ) , LPS
®
Mult iPlex Mult i-
Purpose ( blue in color) , or equivalent .
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