Wilo STRATOS GIGA, Installation And Operating Instructions Manual

Page: 113 / 265

English
Installation and operating instructions Wilo-Stratos GIGA, GIGA-D, GIGA B
(11-22kW)
113
Negative PID-Control:
If the sign of the P term is negative and the process value drops below
the setpoint, the control will decrease the pump speed until the set-
point has been reached.
NOTICE:
Check the controller’s direction of action if PID control is being used,
but the pump is only running at minimum or maximum speed without
responding to changes in the parameter values.
10 Maintenance
Safety Have maintenance and repair work carried out by qualified person-
nel only!
It is recommended to have the pump serviced and checked by Wilo
customer service.
DANGER! Risk of fatal injury!
There is a risk of fatal injury from electric shock when working on
electrical devices.
• Work on electrical devices may only be carried out by electricians
approved by the local electricity supplier.
• Before working on electrical devices, switch them off so that they
are voltage-free and secure against reactivation.
• Any damage to the pump connection cable should only ever be rec-
tified by a qualified electrician.
• Never use an object to poke around the openings on the electronic
module or motor and never insert anything into the module or
motor.
• Follow the installation and operating instructions for the pump,
level control device and other accessories!
DANGER! Risk of fatal injury!
The permanently magnetised rotor inside the motor presents an
acute danger to persons with pacemakers. Non-observance results
in death or the most serious of injuries.
• Persons with pacemakers must follow the general behavioural
guidelines that apply for handling electrical equipment when
working on the pump!
• Do not open the motor!
• Only allow Wilo customer service to dismantle and install the rotor
for maintenance and repair work!
• Only allow persons who do not have a pacemaker to dismantle and
install the rotor for maintenance and repair work.
NOTICE:
The magnets inside the motor do not pose a danger
provided the
motor is completely mounted.
As such, the pump assembly does not pose a special danger to per-
sons with pacemakers, who can safely approach a Stratos GIGA with-
out any restrictions.
WARNING! Risk of injury!
Opening the motor leads to high, suddenly occurring magnetic
forces. These can cause serious cuts, crushing injuries and bruises.
• Do not open the motor!
• Only allow Wilo customer service to dismantle and install the motor
flange and the bearing plate for maintenance and repair work.
DANGER! Risk of fatal injury!
Failure to install safety devices on the electronic module or near
the coupling can cause electric shock or contact with rotating
parts, potentially resulting in life-threatening injuries.
• After maintenance, all safety devices such as module covers or
coupling covers that were removed must be reinstalled!