Recommended M aintenance
92
CVHH-SVX001A-EN
Normal Operation
Table 19.
Normal operation
Ope r a t in g Ch a r a ct e r ist ic
N or m a l Re a d in g
Appr oxim at e Evaporat or Pr essur e
55.2 t o 91.0 k Paa ( 8 t o 13.2 psia) / - 46.2 t o - 10.3 k Pag ( - 6.7 t o - 1.5 psig)
Appr oxim at e Condenser Pressur e
( a)
166.9 t o 259.9 k Paa ( 24.2 t o 37.7 psia) / 65.5 t o 158.6 k Pag ( 9.5 t o 23 psig) ( st andar d condenser)
Oil Sum p Tem perat ure Unit not r unning
43.3°C t o 57.2 °C ( 110°F t o 135°F)
Oil Sum p Tem perat ure Unit running
43.3°C t o 71.1°C ( 110°F t o 160°F)
Oil Sum p Differ ent ial Oil Pr essur e
( b)
137.9 t o 165.5 k Pad ( 20 t o 24 psid)
( a) Condenser pr essur e is dependent on condenser w at er t em per at ur e, and should equal t he sat ur at ion pr essur e of R- 1233
zd
( E) at a t em per at ur e abov e
t hat of leaving condenser w at er at full load.
( b) Oil t ank pr essur e: - 48. 3 t o - 27. 6 k Pag ( - 7 t o - 4 psig) . Dischar ge oil pr essur e: 89.6 t o 137.9 k Pag ( 13 t o 20 psig) .
Table 20. Recommended maintenance
D a ily
Ev e r y 3 m on t h s
Ev e r y 6 m on t hs
An n u a lly
( a ) , ( b)
Check t he chiller ’s evaporat or and
condenser pressures, oil t ank
pr essur e, differ ent ial oil pr essur e
and discharge oil pr essure.
Com par e t he readings w it h t he
values pr ov ided in
Table 19, p. 92
.
Check t he oil level in t he chiller oil
sum p using t he t w o sight glasses
pr ov ided in t he oil sum p head.
When t he unit is operat ing, t he oil
lev el should be v isible in t he low er
sight glass.
Com plet e logs on a daily basis.
Clean all wat er st rainers in t he
w at er piping syst em .
Lubr icat e t he vane cont r ol link age
bear ings, ball j oint s, and pivot
point s.
Lubricat e vane operat or t ang
O- r ings.
Operat e t he t ang operat or s
m anually and check for any
abnor m alit ies.
Drain cont ent s of t he rupt ur e disk
and purge discharge vent line dr ip-
leg int o an evacuat ed wast e
cont ainer. Do t his m or e oft en if t he
purge is operat ed excessively.
Apply oil t o any ex posed m et al
part s t o prevent r ust .
Shut dow n t he chiller once each year t o check t he
it em s list ed on t he
“ CVHH Annual I nspect ion List ”
( r efer t o
“ For m s and Check Sheet s,” p. 102
) .
Perfor m t he annual m aint enance pr ocedur es
r efer r ed t o in
“ Ear t hWise Purge Maint enance,”
p. 94
.
Use an ice wat er bat h t o v er ify t he accuracy of t he
evaporat or r efr igerant t em perat ur e sensor
( 4BT11) . I f t he sensor is exposed t o t em perat ur e
ex t rem es out side it s norm al operat ing range
( - 17.8°C t o 32.2°C [ 0°F t o 90°F] ) , check it s
accuracy at six- m ont h int er vals.
I nspect t he condenser t ubes for fouling; clean if
necessar y.
I nspect and clean t he ifm efect or
®
flow det ect ion
sensor s.
Subm it a sam ple of t he com pr essor oil t o a Trane-
qualified laborat or y for com pr ehensive analy sis.
Summary of Contents for CVHH
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