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NOTICE
Equipment Damage!
To prevent equipment damage, you MUST follow
instructions below:
•
Bypass unit when using a flushing agent.
•
Chilled water piping must rise above the chiller to
ensure the evaporator is full of water and void of air
at all times.
•
Do not over tighten connections.
Water Flow Rates
Establish balanced water flow through both the
evaporator and condenser. Flow rates should fall between
the minimum and maximum values given in General Data
Table 1, p.
7. Flow rates above or below these values can
cause equipment damage or improper unit operation. The
evaporator and condenser water pressure drop can be
read manually using the factory-installed condenser inlet
and outlet pressure gauge service ports. Readings should
approximate those shown by the pressure drop charts for
the individual chillers
(Figure 13, p. 25
p.
26).
Figure 13. Evaporator pressure drop
40.00
35.00
30.00
25.00
20.00
15.00
10.00
5.00
0.00
0.00
CG-SVX044B-EN
and
Figure 15,
Evaporator Flow vs Pressure Drop
50.00
100.00
Flowrate (gpm)
CICD030
CICD045
Note: Pressure drop is an approximation and is to be used
as a tool to estimate flow rate and as an aid to
waterside system piping design. If an accurate
measurement of flow rate is required, an accurate
flow meter must be installed in the system.
Chilled Water System Volume
Minimum system volume requirements are indicated in
Figure 4, p.
25. Special applications may deviate from
these numbers as directed by Trane engineering.
Operation below these volumes will cause unacceptable
system control problems and the potential for evaporator
failure.
Table 4.
Minimum required system volumes
Unit Size (tons)
30
45
55
65
75
Pressure Drop Curves
150.00
200.00
CICD055
CICD065
Installation Mechanical
Volume (gal)
216
324
396
468
540
16.00
14.00
12.00
10.00
8.00
6.00
4.00
2.00
0.00
250.00
CICD075
25
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