Unit Water Piping
Thoroughly flush all water piping to
the unit before making the final
piping connections to the unit.
CAUTION! If using an acidic
commercial flushing solution,
construct a temporary bypass
around the unit to prevent damage
to internal components of the
evaporator. To avoid possible
equipment damage, do not use
untreated or improperly treated
system water.
CAUTION! As the unit contains
pressure approved vessels and
sensitive electronic equipment, do
not use arc welding directly on the
unit or even close to the unit. Do
not weld near the Victaulic
connections.
Unit Piping
Components and layout will vary
slightly, depending on the location
of connections and the water source.
Note: The chilled water piping to the
evaporator is to be Victaulic type
connections. For Free Cooling units,
Free Cooling coil connections are
also to be Victaulic
TM
type
connections.
To prevent damage to chilled water
components, do not allow
evaporator pressure (maximum
working pressure) to exceed 16 bar.
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.
CAUTION! A pipe strainer must be
installed in the entering water line.
Failure to do so can allow
waterborne debris to enter the
evaporator.
"Piping components" include all
devices and controls used to provide
proper water system operation and
unit operating safety. These
components and their general
locations are given below.
In situations where equipment must
be installed with less clearance than
recommended, such as frequently
occurs in retrofit and rooftop
applications, restricted airflow is
common. The Main Processor will
direct the unit to make as much
chilled water as possible given the
actual installed conditions. Consult
your Trane sales engineer for more
details.
Note: If the outdoor unit
configuration requires a variance to
the clearance dimensions, contact
your Trane Sales Office
Representative. Also refer to Trane
Engineering Bulletins for application
information on RTAD chillers.
Drainage
Provide a large capacity drain for
water vessel drain-down during
shutdown or repair. The evaporator
is provided with a drain connection.
All local and national codes apply.
The vent on the top of the
evaporator shell is provided to
prevent a vacuum by allowing air
into the evaporator for complete
drainage.
28 RTAD-SVX01F-E4
Installation - Mechanical
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