110-509 PSC/EN
Polycarbonate Open Tank Circulators
Larger capacity (17 liter and above) polycarbonate open tank Circulating Baths are equipped with a drain
port. To drain fluid from these baths, remove the knurled cap. When replacing the cap, do not over
tighten.
WARNING: Be sure to replace and tighten knurled cap before refilling the bath reservoir.
Checking the Over-Temperature Safety System
Your Circulator incorporates over-temperature protection according to IEC 61010. For optimum safety,
this system should be checked for proper operation at least every six months. This check must be
performed with the unit running.
1. Enter a temperature set point of approximately 50°C and then allow the bath to stabilize at that
temperature. The amount of time this will take will depend on the size of the bath and the difference
between the initial bath temperature and the Safety Set temperature.
2. Once the bath temperature has stabilized, slowly rotate the Safety Thermostat
counter-clockwise until you hear a soft “click;” the OVERTEMP or LOW FLUID
alarm symbol will appear on the display approximately 5-10 seconds later. At
this point, the heater will also turn OFF.
3. Slowly rotate the Safety Thermostat clockwise until the alarm symbol
extinguishes (you may also hear a soft “click”). The heater should turn back
ON.
4. Reset the Safety Set temperature to the desired temperature value
(see Controller Setup, Safety Set Temperature).
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