106
CVHH-SVX001G-EN
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.
Normal Operation
Table 25. Normal operation
Operating Characteristic
Normal Reading
Approximate Evaporator Pressure
8 to 13.2 psia (55.2 to 91.0 kPaA) / -6.7 to -1.5 psig (-46.2 to -10.3 kPaG)
Approximate Condenser Pressure
(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)
Oil Sump Temperature Unit not running
110°F to 135°F (43.3°C to 57.2°C)
Oil Sump Temperature Unit running
110°F to 160°F (43.3°C to 71.1°C)
Oil Sump Differential Oil Pressure
(b)
20 to 24 psid (137.9 to 165.5 kPaD)
(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).
N
NO
OT
TIIC
CE
E
E
Eq
qu
uiip
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me
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ntt D
Da
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F
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aiillu
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em
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ov
ve
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he
e ssttrra
aiin
n rre
elliie
eff w
wiitth
h tth
he
e sse
en
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cco
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essu
ulltt iin
n e
eq
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da
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D
Do
o N
NO
OT
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atttte
em
mp
ptt tto
o p
pu
ullll sse
en
nsso
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bu
ullb
b tth
hrro
ou
ug
gh
h tth
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e
ssttrra
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allw
wa
ay
yss rre
em
mo
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en
nttiirre
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Table 26.
Recommended maintenance
Daily
Every 3 months
Every 6 months
Annually
(a)
,
(b)
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.
Clean all water strainers in the
water piping system.
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.
Shut down the chiller once each year to check the
items listed on the
Chiller Annual Inspection List,” p.
(refer to
).
Perform the annual maintenance procedures
referred to in
.
Summary of Contents for CVHH CenTraVac
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