Recommended Maintenance
92 CVHH-SVX001A-EN
Normal Operation
Table 19. Normal operation
Operating Characteristic Norm al Reading
Approximate Evaporator Pressure 55.2 to 91.0 kPaa (8 to 13.2 psia) / -46.2 to -10.3 kPag (-6.7 to -1.5 psig)
Approximate Condenser Pressure
(a)
166.9 to 259.9 kPaa (24.2 to 37.7 psia) / 65.5 to 158.6 kPag (9.5 to 23 psig) (standard condenser)
Oil Sum p Temperature Unit not running 43.3°C to 57.2 °C (110°F to 135°F)
Oil Sum p Temperature Unit running 43.3°C to 71.1°C ( 110°F to 160°F)
Oil Sump Differential Oil Pressure
(b)
137.9 to 165.5 kPad (20 to 24 psid)
(a) Condenser pressure is dependent on condenser water temperature, and should equal the saturation pressure of R-1233
zd
(E) at a tem perature above
that of leaving condenser water at full load.
(b) Oil tank pressure: -48.3 to -27.6 kPag (-7 to -4 psig). Discharge oil pressure: 89.6 to 137.9 kPag (13 to 20 psig).
Table 20. Recommended maintenance
Daily Every 3 m onths 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
Tab le 1 9, p . 9 2 .
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.
Com plete 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 ventline drip-
leg into an evacuated waste
container. Do this m ore often if t he
purge is operated excessively.
Apply oil to any exposed metal
parts to prevent rust.
Sh ut d ow n t he chil ler once ea ch y ea r t o ch eck t h e
items listed on the
“CVHH Annual Inspection List”
(refer to “Forms and Check Sheets,” p. 102).
Perform the annual m aintenance procedures
referred to in
“EarthWise Purge Maintenance,”
p. 94.
Use a n i ce w a t e r b a t h t o v e r i f y t h e ac cu r a cy o f t h e
evaporator refrigerant temperature sensor
(4BT11). If the sensor is exposed to tem perature
extrem es outside its normal operating range
(-17.8°C to 32.2°C [0°F to 90°F] ), check its
accuracy at six-month intervals.
Inspect the condenser tubes for fouling; clean if
necessary.
Inspect and clean the ifm efector
®
flow detection
sensors.
Submit a sample of the compressor oil to a Trane-
qualified laboratory for comprehensive analysis.
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