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Technical Specifications - Gruppo Ferroli Gruppo solare IDRO 70 Manual Del Usuario

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Gruppo solare IDro 70

sYsTeM CoMMIssIoNING

After carrying out the pipe connections, it is advisable to clean the system to

remove any impurities. Proceed as follows:

• close the balancing valve

• connect to the filling connection and run water into the system, making it

circulate until clean water comes out the drain connection

• if water is used for this operation, drain the system via the prepared con-

nection, making sure to force the opening of the non-return valve by turning

the return valve (blue) 45° in closing

• repeat the filling operation, but this time with appropriate heat transfer fluid

(water and glycol max. 50%)

• put all the hydraulic parts of the unit in the working position and activate

the circulating pump.

• open the air vent valve on the delivery side and circulate the fluid for several

minutes, then recheck the circuit pressure: if it is lower than the required

design value, add more fluid and repeat the venting operation.

• once the system is vented, run the pump at maximum speed and adjust the

flow according to the solar collector manufacturer's instructions. The flow

rate is adjusted by means of the balancing valve and the reading on the

respective indicator or with the pump speed selector.

FaulTs

• If the pump does not turn, first make sure the power cable is properly

connected then undo the middle screw and free the rotor with a screwdriver.

ATTENTION: The rotor, like other hydraulic parts, may be very hot.

• If the pump is noisy, make sure there is no air inside the circuit otherwise

repeat the commissioning operation. If necessary, increase the system

pressure to the permissible design maximum or operate the pump speed

selector, selecting a lower one or suitable for system requirements.