Trane IntelliPak Installation, Operation And Maintenance Manual page 46

Installation
Make-up water inlet connection is a ¾" PVC slip connector.
Care must be taken to ensure the water line upstream of
the water solenoid valve will not freeze. Insulating the line
and utilizing heat tape is recommended if ambient
temperatures below 32° F are expected.
Water Quality
Overall performance of any water-cooled device can be
affected by suspended particulates, mineral
concentration, trash and debris resulting in clogging and
heat transfer loss.The evaporative-cooled condenser is
designed to greatly minimize problems with these
impurities.
However, float valves and solenoid valves are used to
control the incoming water. If the incoming water contains
contaminants, sand or other objects, an incoming line
strainer with a 80 to 100 mesh screen is required.The inlet
line should be flushed prior to connection to the unit,
whether or not there is a strainer.
Note: Backflow preventer to be field provided and
installed by others.
Water Drain Schedule 80 PVC pipe of 1¼" is normally
adequate for sump water drain. Periodically, the sump is
emptied and flushed to eliminate accumulated dirt, debris,
and minerals.
Concentration of these foreign substances will increase as
the system operates.The evaporative process releases
essentially pure water vapor into the atmosphere, leaving
the impurities behind that accumulate in the sump.
Although these impurities are present in the original
make-up water, their concentration will be higher in the
sump discharge. Care and judgment should be exercised
when selecting a discharge site.
Local Site Discharge
Rooftop or simple storm sewer discharge is generally
acceptable. Do not routinely direct the sump discharge
onto an area where these higher concentrations will
adversely affect that area, i.e. continued sump discharge
into a flower bed for example, where the input water
contains CaCO3 (lime) will eventually decrease the pH of
the soil.
Sewer Discharge
The quantities of mineral and debris flushed are actually
very small, and do not cause problems when diluted in
normal sewer flow. However, local, state or federal
standards and restrictions must be followed in any given
locality
Make Up Water Solenoid Valve
This valve is controlled by the UCM based on water level
in the sump, as well as whether a call for mechanical
cooling exists.
During low ambient temperatures, the solenoid valve will
be de-energized preventing water from further filling
sump.The sump drain valve opens to empty sump of
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water. Operation can be extended to 10 deg by providing
an optional sump heater.
Drain Valve
The drain valve is shipped to "drain during power loss
conditions" . If "hold during power loss conditions" is
desired, refer to "Evaporative Condenser Drain Valve
Setup" on page 89.
RT-SVX36K-EN