ELECTRONIC CIRCULATOR FOR SOLAR THERMAL SYSTEMS - Art. S166
FI.S166.EN.C - 10/2022
Icma SpA - Via Garavaglia, 4 - 20012 Cuggiono (MI) ITALY Tel: +39 02 97249134 - +39 02 97249135 - www.icmaspa.it - [email protected]
16
10.2 Unlocking procedure
A red light in the LED indicates a locking.
Turn the selector to the position max, disconnect and connect power supply to start the automatic release process.
The circulator operates 100 attempts to restart (process lasts approximately 15 minutes).
Every restart is signalled by a short flash of LED light. If the locking is not removed through the automatic release
process after 100 attempts to restart the circulator, it goes into standby and the LED remains red. In this case follow
the manual procedure described in the next steps:
1. Disconnect power supply - the warning light switches off.
2. Close both isolating valves and allow cooling. If there are no shut-off devices, drain the system so that the fluid
level is beneath that of the circulator.
3. Carefully pull the rotor/impeller
4. Remove impurities and deposits with appropriate agents.
5. Reinsert the rotor/impeller
6. Set the selector on the wished position.
7. Connect power supply.
If the circulator doesn’t run
→
10 Faults, causes and remedies
With high fluid temperatures and pressures there is the risk of burnings.
Hazard of scalding by simple contact.
