Installation Mechanical
RTWB-SVN01B-E4
14
Water treatment
Do not use untreated or improperly
treated water. Use of untreated or
improperly treated water may result
in equipment damage.
The use of improperly treated or
untreated water in this equipment
may result in scaling, erosion,
corrosion, algae or slime. The
services of a qualified water-
treatment specialist should be
engaged to determine what
treatment, if any, is advisable. The
Trane Company warranty
specifically excludes liability for
corrosion, erosion or deterioration
of Trane equipment. Trane assumes
no responsibility for the results of
the use of untreated or improperly
treated water, or saline or brackish
water.
Figure 9
Cooling device bypass
Cooling device bypass is also a valid
control method if the chiller
temperature requirements can be
maintained.
1 = 3-way valve or 2 2-way valves
2 = Customer controller
3 = Condenser water pump
4 = To/from cooling device
5 = Temperature sensor
Advantage:
• Excellent control by maintaining
constant water flow through the
condenser.
Disadvantage:
• Higher cost because of the
dedicated pump required for each
chiller if condenser pressure is the
control signal.
Figure 10
Condenser water pump with
variable frequency drive
1 = Customer controller
2 = Condenser water pump with VFD
3 = To/from cooling device
4 = Temperature sensor
Advantages:
• Pumping cost can be reduced.
Good cooling device temperature
control.
• Relatively low first cost.
Disadvantages:
• Increased rate of fouling due to
lower water velocity in the
condenser.
