Priority Of Settings; Servicing The Product; Maintenance; Motor Cleaning - Grundfos CMBE Instrucciones De Instalación Y Operación

8.7 Priority of Settings

With Grundfos GO Remote, you can set the motor to operate at
maximum speed or to stop.
If two or more functions are enabled at the same time, the motor
operates according to the function with the highest priority.
Start/stop Grundfos GO Remote or operating panel on
Priority
button motor
1 Stop
2 Stop
3 Manual
4 Maximum speed / User defined speed
5
6
7
8
9
10
11
12 Minimum speed
13
14
15 Start
* Stop and Maximum speed settings made with Grundfos GO Remote or on the motor operating panel can be overruled by another operating-mode command
sent from a bus, for example Start. If the bus communication is interrupted, the motor resumes its previous operating mode, for example Stop, that was
selected with Grundfos GO Remote or the motor operating panel.

9. Servicing the product

DANGER
Electric shock
Death or serious personal injury
‐
Switch off the incoming power supply before you start
any work on the product or connected pumps.
‐
Make sure that the power supply cannot be switched
on accidentally.

9.1 Maintenance

The internal pump parts are maintenance-free.
The motor has maintenance-free, greased-for-life bearings.

9.2 Motor cleaning

Keep motor cooling fins and fan blades clean to ensure adequate
cooling of the motor and electronics.
You must keep the motor clean to ensure sufficient cooling of the
motor. If the product is installed in dusty environments, clean and
check the motor regularly. Take the enclosure class of the motor
into account when cleaning.

9.3 Refilling of the diaphragm tank

We recommend that you refill the tanks with nitrogen gas
once a year.
16
If you have set the motor to maximum speed via the digital input,
the motor operating panel or Grundfos GO Remote can only set the
motor to Manual or Stop.
The priority of the settings appears from the table below:
Digital input Bus communication
Stop
User defined speed
Stop
Maximum speed / User defined
speed
Minimum speed
Start
Maximum speed
Minimum speed
Start

10. Taking the product out of operation

10.1 Maintaining the product during standstill

10.1.1 Frost protection
If the product is not being used during periods of frost, it must be
drained to avoid damage. Remove the filling and drain plugs. Do
not refit the plugs until the product is put into operation again.
10.1.2 "Standstill heating"
Use this function to avoid condensation in humid environments.
When you set the function to Active and the product is in operating
mode Stop, a low AC voltage is applied to the motor windings. The
voltage is not high enough to make the motor rotate, but ensures
that sufficient heat is generated to avoid condensation in the
product, including the electronic parts in the drive.
Remember to remove the drain plugs and fit a cover over
the product.

11. Fault finding the product

DANGER
Electric shock
Death or serious personal injury
‐
Switch off the power supply before you start any work
on the product.
‐
Make sure that the power supply cannot be switched
on accidentally.
Fault finding and fault correction must be carried out by qualified
persons.