WTR2-640
Chapter 3: Installation
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7. Any water present in the system must boil off before continuing operation. Select a
set point of 215ºF (102ºC) and observe the reservoir tank vent for any signs of
escaping steam.
Continue to run at this set point temperature until no more steam appears and
pressure stabilizes.
8. When fluid level stabilizes and the air and water are purged from the system, allow
the vent timer to run out.
- or -
If so equipped, close the vent valve. Do not open the vent valve at temperatures
exceeding 250ºF (121ºC).
With the system properly purged, only four to six inches (4” to 6” / 10 cm to 15 cm) of
fluid should be visible in the sight glass. This lets the fluid expand as it heats, also
permitting process fluid additional capacity when the pump reverses and fluid is
withdrawn from the mold.
The Upright unit is now ready for use. All that is now required, is to select a process set
point on the controller.
If all traces of water are not removed from the system, severe cavitation may
occur at elevated temperatures. Indications are a rough-sounding pump, fluctuating
or dropping pressure, or a rapidly rising fluid level in the expansion tank. Repeat
Step 3 if this occurs.
