Evaporator Piping - Trane RTAF SE Series Installation Operation & Maintenance

Evaporator Piping

Evaporator water connections are grooved.
Thoroughly fl ush all water piping to the unit before
making the fi nal piping connections to the unit.
Components and layout will vary slightly, depending on
the location of connections and the water sources.
An air vent is located on top of the evaporator at the
chiller water inlet. Be sure to provide additional air vents
at the highest points in the piping to remove air from the
chilled water system. Install necessary pressure gauges to
monitor the entering and leaving chilled water pressure.
Provide shut off 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 line to control water fl ow
balance. Install shutoff valves on both the entering and
leaving water lines so that the evaporator can be isolated
for service.
CAUTION! The chilled-water connections to the
evaporator are to be "grooved pipe" type connections.
Do not attempt to weld these connections, because the
heat generated from welding can cause microscopic
and macroscopic fractures on the cast iron water boxes
that can lead to premature failure of the water box. An
optional grooved pipe stub and coupling is available for
welding on fl anges.
To prevent damage to chilled-water components, do not
allow evaporator pressure (maximum working pressure)
to exceed 10.5 Bar.
A pipe strainer must be installed in the entering water
line. Failure to do so can allow waterborne debris to enter
the evaporator.
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RLC-SVX19A-E4