Zenit UNIQA Serie Manual De Instalacion Y Uso página 55

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7.6 Changing the cooling fluid
Models with cooling jackets use a 30% water and propylene glycol mixture as a coolant, which keeps its characteristics constant to a temperature
of -13°C (9°F).
The mixture needs to be replaced in the following cases:
•
When the mechanical seals are changed (when the sensor sets off the relative signal).
•
Following any repair work that requires the glycols to be drained out.
Procedure to change the cooling liquid
To empty the liquid out of the cooling system, do the following (Fig. 17):
1. Set the electric pump up vertically on a smooth and stable surface;
2. Secure the electric pump by a suitably sized chain or rope hooked onto the top handle, to avoid it from accidentally falling;
3. Set up a suitable tray to collect the coolant liquid contained in the jacket, to avoid uncontrolled spillage into the environment, and make sure it
is disposed of accordingly;
4. Unscrew the top cap;
5. Unscrew the bottom cap, being careful to protect yourself from spillage through the use of personal protection equipment
6. Incline the electric pump until it is completely empty.
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Do the following to fill up the cooling system (Fig. 18):
1. Set the electric pump up vertically on a smooth and stable surface;
2. Secure the electric pump by a suitably sized chain or rope hooked onto the top handle, to avoid it from accidentally falling;
3. Close the bottom cap;
4. Fill the system from the top hole;
5. Close the top cap.
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Safety, Installation and Operations Manual – Translation of original instructions
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