Trane AquaStream 2 CGWN Series Installation Operation & Maintenance page 26

Figure 13 – CGWN operating limits
CGWN operating envelope
Limits of operation
-12/+45
-12/+20
-20 -10
Leaving chilled water temperature
Note: CGWN 205 to 211 have a maximum condenser leaving water temperature of 60°C.
26
Installation
Operating range
CAUTION: Maximum operating time
for low condensing water outlet
is 1 minute. The compressor shall
become noisy.
The envelope represents the operating
range in which the unit will work
without control limitation. To keep
the unit operating in this envelope, be
careful to adjust setpoints inside with
a clearance equal to half the dead
band.
+4/+64
+18/+64
70
60
50
40
30
+18/+23
20
+14/+20
10
0
0 10 20
Check also compressor suction
superheat for being close to 5 or
6°C for low chilled leaving water
temperature to minimize compressor
discharge temperature. For very high
leaving condensing water temperature
above 55°C, the refrigerant charge
can be minimized by 20%.
Figure 14 – CCUN operating limits
CCUN operating envelope
Limits of operation
-12/+50
-12/+25
-20 -10
Leaving chilled water temperature
+18/+67
80
+4/+67
70
60
50
40
+18/+30
30
20
+14/+25
10
0
0 10 20
CG-SVX06F-GB