Evaporator Piping - Trane CGAM Installation & Operation Manual

Installation - Mechanical

Evaporator Piping

Evaporator water connections are grooved.
Thoroughly flush all water piping to the CGAM unit before
making the final piping connections to the unit.
Components and layout will vary slightly, depending on
the location of connections and the water source.
NOTICE:
Equipment Damage!
If using an acidic commercial flushing solution,
construct a temporary bypass around the unit to
prevent damage to internal components of the
evaporator and the pump.
NOTICE:
Proper Water Treatment!
The use of untreated or improperly treated water could
result in scaling, erosion, corrosion, algae or slime. It is
recommended that the services of a qualified water
treatment specialist be engaged to determine what
water treatment, if any, is required. Trane assumes no
responsibility for equipment failures which result from
untreated or improperly treated water, or saline or
brackish water.
Figure 46. Water piping components
4
Table 21. Water piping components
Item Description
1 Bypass Valve
2 Isolation Valves
3 Vibration Eliminators
4 Evaporator Heat Exchanger
5 Water Heater
6 Valve for Pressure Point
7 Strainer
46
6
7
8
B
6
UNIT
5
Item Description
Pi Gauge
FT Water Flow Switch
T1 Evap Water Inlet Temp Sensor
T2 Evap Water Outlet Temp Sensor
A Isolate unit for initial water loop cleaning
Brazed plate differential pressure gauge and piping not supplied. Must account for water
B
head height difference when calculating brazed plate pressure differential.
Drainage
Locate the unit near a large capacity drain for water vessel
drain-down during shutdown or repair. Evaporators are
provided with drain connections. Refer to "Water Piping. "
All local and national codes apply.
A vent is provided on the top of the evaporator at the
chilled water inlet. Be sure to provide additional vents at
high points in the piping to bleed air from the chilled water
system. Install necessary pressure gauges to monitor the
entering and leaving chilled water pressures.
Provide shutoff valves in lines to the gauges to isolate
them from the system when they are not in use. Use
rubber vibration eliminators to prevent vibration
transmission through the water lines.
If desired, install thermometers in the lines to monitor
entering and leaving water temperatures. Install a
balancing valve in the leaving water line to control water
flow balance. Install shutoff valves on both the entering
and leaving water lines so that the evaporator can be
isolated for service.
Evaporator Piping Components
Piping components include all devices and controls used
to provide proper water system operation and unit
operating safety. See
are listed below.
3
5
3
5
CUSTOMER PIPING
Figure 46, p. 46.These components
2
1
A
2
CG-SVX17E-EN