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Recommended Maintenance
W W A A R R N N I I N N G G
H H a a z z a a r r d d o o u u s s V V o o l l t t a a g g e e w w / / C C a a p p a a c c i i t t o o r r s s ! !
F F a a i i l l u u r r e e t t o o d d i i s s c c o o n n n n e e c c t t p p o o w w e e r r a a n n d d d d i i s s c c h h a a r r g g e e
c c a a p p a a c c i i t t o o r r s s b b e e f f o o r r e e s s e e r r v v i i c c i i n n g g c c o o u u l l d d r r e e s s u u l l t t i i n n d d e e a a t t h h o o r r
s s e e r r i i o o u u s s i i n n j j u u r r y y . .
D D i i s s c c o o n n n n e e c c t t a a l l l l e e l l e e c c t t r r i i c c p p o o w w e e r r , , i i n n c c l l u u d d i i n n g g r r e e m m o o t t e e
d d i i s s c c o o n n n n e e c c t t s s a a n n d d d d i i s s c c h h a a r r g g e e a a l l l l m m o o t t o o r r s s t t a a r r t t / / r r u u n n
c c a a p p a a c c i i t t o o r r s s b b e e f f o o r r e e s s e e r r v v i i c c i i n n g g . . F F o o l l l l o o w w p p r r o o p p e e r r
l l o o c c k k o o u u t t / / t t a a g g o o u u t t p p r r o o c c e e d d u u r r e e s s t t o o e e n n s s u u r r e e t t h h e e p p o o w w e e r r
c c a a n n n n o o t t b b e e i i n n a a d d v v e e r r t t e e n n t t l l y y e e n n e e r r g g i i z z e e d d . . F F o o r r v v a a r r i i a a b b l l e e
f f r r e e q q u u e e n n c c y y d d r r i i v v e e s s o o r r o o t t h h e e r r e e n n e e r r g g y y s s t t o o r r i i n n g g
c c o o m m p p o o n n e e n n t t s s p p r r o o v v i i d d e e d d b b y y T T r r a a n n e e o o r r o o t t h h e e r r s s , , r r e e f f e e r r t t o o
t t h h e e a a p p p p r r o o p p r r i i a a t t e e m m a a n n u u f f a a c c t t u u r r e e r r ' ' s s l l i i t t e e r r a a t t u u r r e e f f o o r r
a a l l l l o o w w a a b b l l e e w w a a i i t t i i n n g g p p e e r r i i o o d d s s f f o o r r d d i i s s c c h h a a r r g g e e o o f f
c c a a p p a a c c i i t t o o r r s s . . V V e e r r i i f f y y w w i i t t h h a a C C A A T T I I I I I I o o r r I I V V v v o o l l t t m m e e t t e e r r
r r a a t t e e d d p p e e r r N N F F P P A A 7 7 0 0 E E t t h h a a t t a a l l l l c c a a p p a a c c i i t t o o r r s s h h a a v v e e
d d i i s s c c h h a a r r g g e e d d . .
F F o o r r a a d d d d i i t t i i o o n n a a l l i i n n f f o o r r m m a a t t i i o o n n r r e e g g a a r r d d i i n n g g t t h h e e s s a a f f e e
d d i i s s c c h h a a r r g g e e o o f f c c a a p p a a c c i i t t o o r r s s , , s s e e e e P P R R O O D D - - S S V V B B 0 0 6 6 * * - - E E N N . .
N N O O T T I I C C E E
C C h h e e c c k k P P u u r r g g e e R R u u n n - - T T i i m m e e f f o o r r U U n n i i t t
H H e e r r m m e e t t i i c c I I n n t t e e g g r r i i t t y y ! !
F F a a i i l l u u r r e e t t o o f f o o l l l l o o w w i i n n s s t t r r u u c c t t i i o o n n s s b b e e l l o o w w c c o o u u l l d d r r e e s s u u l l t t i i n n
c c h h i i l l l l e e r r d d a a m m a a g g e e . .
I I f f f f r r e e q q u u e e n n t t p p u u r r g g i i n n g g i i s s r r e e q q u u i i r r e e d d , , m m o o n n i i t t o o r r p p u u r r g g e e
p p u u m m p p o o u u t t r r a a t t e e , , a a n n d d i i d d e e n n t t i i f f y y a a n n d d c c o o r r r r e e c c t t s s o o u u r r c c e e o o f f
a a i i r r o o r r w w a a t t e e r r l l e e a a k k a a s s s s o o o o n n a a s s p p o o s s s s i i b b l l e e t t o o p p r r e e v v e e n n t t
m m o o i i s s t t u u r r e e c c o o n n t t a a m m i i n n a a t t i i o o n n c c a a u u s s e e d d b b y y l l e e a a k k a a g g e e . .
Normal Operation
Table 21. Normal operation
Operating Characteristic Normal Reading
Approximate Evaporator
Pressure
Approximate Condenser
,
Pressure
(a)
(b)
Oil Sump Temperature
Unit not running
Oil Sump Temperature
Unit running
Oil Sump Differential
Oil Pressure
(c)
CDHF-SVX01N-EN
6 to 9 psia (41.4 to 62.1 kPaA) /
-9 to -6 psig (-62.1 to -41.4 kPaG)
17 to 27 psia (117.2 to 182.2 kPaA) /
2 to 12 psig (13.8 to 82.7 kPaG)
(standard condenser)
140°F to 176°F (60.0°C to 80.0°C)
95°F to 162°F (35.0°C to 72.2°C)
18 to 22 psid (124.1 to 151.7 kPaD)
N N O O T T I I C C E E
D D o o N N o o t t U U s s e e N N o o n n - - C C o o m m p p a a t t i i b b l l e e P P a a r r t t s s o o r r
M M a a t t e e r r i i a a l l s s ! !
U U s s e e o o f f n n o o n n - - c c o o m m p p a a t t i i b b l l e e p p a a r r t t s s o o r r m m a a t t e e r r i i a a l l s s c c o o u u l l d d
r r e e s s u u l l t t i i n n e e q q u u i i p p m m e e n n t t d d a a m m a a g g e e . .
O O n n l l y y g g e e n n u u i i n n e e T T r r a a n n e e ® ® r r e e p p l l a a c c e e m m e e n n t t c c o o m m p p o o n n e e n n t t s s
w w i i t t h h i i d d e e n n t t i i c c a a l l T T r r a a n n e e p p a a r r t t n n u u m m b b e e r r s s s s h h o o u u l l d d b b e e u u s s e e d d
i i n n T T r r a a n n e e C C e e n n T T r r a a V V a a c c c c h h i i l l l l e e r r s s . . T T r r a a n n e e a a s s s s u u m m e e s s n n o o
r r e e s s p p o o n n s s i i b b i i l l i i t t y y f f o o r r d d a a m m a a g g e e s s r r e e s s u u l l t t i i n n g g f f r r o o m m t t h h e e u u s s e e
o o f f n n o o n n - - c c o o m m p p a a t t i i b b l l e e p p a a r r t t s s o o r r m m a a t t e e r r i i a a l l s s . .
This section describes the basic chiller preventive
maintenance procedures, and recommends the
intervals at which these procedures should be
performed. Use of a periodic maintenance program is
important to ensure the best possible performance and
efficiency from a CenTraVac™ chiller.
For R-123 chillers, recommended purge maintenance
procedures are detailed in Operation and Maintenance
Guide: EarthWise Purge System with Tracer
AdaptiView Control for Water-Cooled CenTraVac
Chillers with R-123 Refrigerant (PRGF-SVX01*-EN). For
R-514A chillers, recommended purge maintenance
procedures are detailed in Operation and Maintenance
Guide: Purge System with Tracer AdaptiView Control
for Water-Cooled CenTraVac Chillers with R-514A
Refrigerant (PRGG-SVX001*-EN).
Record Keeping Forms
An important aspect of the chiller maintenance
program is the regular completion of records. Refer to
"Appendix A: Forms and Check Sheets," p. 95
copies of the recommended forms. When filled out
accurately by the machine operator, the completed
logs can be reviewed to identify any developing trends
in the chiller's operating conditions. For example, if the
machine operator notices a gradual increase in
condensing pressure during a month's time, she can
systematically check and then correct the possible
cause of this condition.
Table 21. Normal operation (continued)
(a)
Condenser pressure is dependent on condenser water temperature,
and should equal the saturation pressure of the refrigerant at a
temperature above that of leaving condenser water at full load.
(b)
Normal pressure readings for ASME condenser exceed 12 psig
(82.7 kPaG).
(c)
Oil tank pressure: -9 to -6 psig (-62.1 to -41.4 kPaG). Discharge oil
pressure: 7 to 15 psig (48.3 to 103.4 kPaG).
for
85
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