Minimal Installation Water Content; Water Treatment - Trane AquaStream CGWN 205 Installation Operation & Maintenance

CG-SVX06D-E4
Installation
Minimal installation water
content
The water volume is an important
parameter because it allows a stable
chilled water temperature and avoids
short cycle operation of the
compressors.
Parameters which influence the
water temperature stability
• Water loop volume
• Load fluctuation
• Number of capacity steps
• Compressors rotation
• Dead band
• Minimum time between 2 starts
of a compressor
The following table gives the

minimal installation water content

recommended according to all these
parameters for both comfort and
process cooling application.
Table 10 - Minimal water content
2°C Dead
band (1)
CGWN - CCUN 205 660 l
CGWN - CCUN 206 670 l
CGWN - CCUN 207 650 l
CGWN - CCUN 208 880 l
CGWN - CCUN 209 1060 l
CGWN - CCUN 210 1080 l
CGWN - CCUN 211 1260 l
CGWN - CCUN 212 1260 l
CGWN - CCUN 213 1050 l
CGWN - CCUN 214 1270 l
CGWN - CCUN 215 1240 l
Notes
(1) Minimum water loop volume in order to obtain maximum +/- 1°C chilled water temperature fluctuation vs. Chilled
water set-point
(2) Minimum water loop volume in order to obtain maximum +/- 1.5°C chilled water temperature fluctuation vs.
Chilled water set-point
(3) Minimum water loop volume in order to obtain maximum +/- 2°C chilled water temperature fluctuation vs. Chilled
water set-point
This table is estimated with
- Condenser : Water 30°/35°C
- Evaporator : Water 12°/7°C

Water treatment

Untreated or insufficiently treated
water, if used in this unit, may cause
scale, slime or algae to accumulate
or cause erosion and corrosion. As
Trane does not know the
components used in the hydraulic
network and the quality of the water
used, we recommend the services of
a qualified water treatment specialist.
The following materials are used in
Trane chillers heat exchangers:
• Stainless steel plates AISI 316,
1.4401 with copper brazing
• Water piping: steel
• Water connections: brass
Trane will not accept any liability in
regards of damage due to the use of
untreated or improperly treated
water or from the use of saline or
brackish water. If water treatment is
required, contact your local Trane
sales office.
Confort Application
3°C Dead 4°C Dead
band (2) band (3)
440 l 330 l
450 l 340 l
440 l 330 l
580 l 440 l
700 l 530 l
720 l 540 l
840 l 630 l
840 l 630 l
700 l 530 l
850 l 640 l
820 l 620 l
Process cooling Application
2°C Dead 3°C Dead 4°C Dead
band (1) band (2) band (3)
1160 l 730 l 530 l
1160 l 740 l 540 l
1100 l 710 l 520 l
1520 l 960 l 710 l
1860 l 1170 l 860 l
1870 l 1190 l 870 l
2220 l 1400 l 1020 l
2170 l 1380 l 1010 l
1760 l 1130 l 830 l
2150 l 1370 l 1010 l
2060 l 1330 l 980 l
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