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R R e e c c o o m m m m e e n n d d e e d d M M a a i i n n t t e e n n a a n n c c e e
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
Normal Operation
Table 25. Normal operation
Operating Characteristic
Approximate Evaporator Pressure
Approximate Condenser Pressure
Oil Sump Temperature Unit not running
Oil Sump Temperature Unit running
Oil Sump Differential Oil Pressure
(a)
Condenser pressure is dependent on condenser water temperature, and should equal the saturation pressure of R-1233zd at a temperature above that of
leaving condenser water at full load.
(b)
Oil tank pressure: -7 to -4 psig (-48.3 to -27.6 kPaG). Discharge oil pressure: 13 to 20 psig (89.6 to 137.9 kPaG).
Table 26. Recommended maintenance
Daily
Check the chiller's evaporator and
condenser pressures, oil tank
pressure, differential oil pressure,
and discharge oil pressure.
Compare the readings with the
values provided in the preceding
table.
Check the oil level in the chiller oil
sump using the two sight glasses
provided in the oil sump head.
When the unit is operating, the oil
level should be visible in the lower
sight glass.
Complete logs on a daily basis.
106
Normal Reading
8 to 13.2 psia (55.2 to 91.0 kPaA) / -6.7 to -1.5 psig (-46.2 to -10.3 kPaG)
(a)
24.2 to 37.7 psia (166.9 to 259.9 kPaA) / 9.5 to 23 psig (65.5 to 158.6 kPaG) (standard condenser)
110°F to 135°F (43.3°C to 57.2°C)
110°F to 160°F (43.3°C to 71.1°C)
(b)
20 to 24 psid (137.9 to 165.5 kPaD)
Every 3 months
Clean all water strainers in the
water piping system.
condensing pressure during a month's time, she can
systematically check and then correct the possible
cause of this condition.
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 ! !
F F a a i i l l u u r r e e t t o o r r e e m m o o v v e e t t h h e e s s t t r r a a i i n n r r e e l l i i e e f f w w i i t t h h t t h h e e s s e e n n s s o o r r
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 . .
D D o o N N O O T T a a t t t t e e m m p p t t t t o o p p u u l l l l s s e e n n s s o o r r b b u u l l b b t t h h r r o o u u g g h h t t h h e e
s s t t r r a a i i n n r r e e l l i i e e f f ; ; a a l l w w a a y y s s r r e e m m o o v v e e t t h h e e e e n n t t i i r r e e s s t t r r a a i i n n r r e e l l i i e e f f
w w i i t t h h t t h h e e s s e e n n s s o o r r . .
Every 6 months
Lubricate the vane control linkage
bearings, ball joints, and pivot
points.
Lubricate vane operator tang O-
rings.
Operate the tang operators
manually and check for any
abnormalities.
Drain contents of the rupture disk
and purge discharge vent-line
drip-leg into an evacuated waste
container. Do this more often if the
purge is operated excessively.
Apply oil to any exposed metal
parts to prevent rust.
N N O O T T I I C C E E
,
Annually
(a)
(b)
Shut down the chiller once each year to check the
items listed on the
"Appendix D: CVHH
CenTraVac™ Chiller Annual Inspection List," p.
123
(refer to
"Appendix A: Forms and Check
Sheets," p.
118).
Perform the annual maintenance procedures
referred to in
"Maintenance," p.
110.
CVHH-SVX001G-EN
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