67
Filling
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Lift the cover.
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Unscrew the sealing rod to the upper end stop. The thermal fluid supply to the
external system is now open.
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Carefully pour a suitable thermal fluid into the expansion vessel, or sight glass
with help of appropriate accessories such as a funnel and / or beaker. The
thermal fluid flows via the expansion vessel into the machine, then through the
hoses into the external application.
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Start the filling process by selecting the main menu point air purging. The filling
process is finished when the fluid level in the bath / sight glass (sight glass
approx 1/3 full) and there are no air bubbles left in the external system (e.g.
double jacket). The electronics monitor the filling level and will display a
corresponding message via the graphics display.
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Finally let the air purging run for a few minutes so that any trapped air bubbles
which may cause the machine to trip during temperature control operation, can
escape.
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Note the volume change of the thermal fluid in connection with the operating
temperature. At the lowest temperature required, the fluid must be above the
„Minimum” mark in the sight glass, and it must not overflow at the highest
temperature required. In case of over filling, drain off the excess fluid into a
suitable container via the expansion vessel drain (9) or drain (8).
