Selecting The Operating Mode - Burkert 7615 Manuel D'utilisation

8.5.

Selecting the operating mode

There are 4 operating modes:
• Forward dosing
• Reverse dosing
• Rinsing mode, i.e. there is a free flow through the dosing unit
• Heating mode to be used at low temperatures
The various operating modes are generated by different configurations
of the four plug pins:
PIN Forward Reverse
dosing dosing
4
+
(supply) 1)
3
not connected
(reverse)
2
–
(GND)
1
+
not connected
(forward)
The unit will operate without a continuous power supply on pin 4.
1)
In this case, there is a brief initialization time before the dosing
(approx. 25 ms).
The duty cycle time in the rinsing mode is limited to avoid
overheating. The unit is switched off automatically after 10 minutes.
Type 7615
Start-up
Rinsing mode Heating
(all of the valves mode
are open)
+
not connected
+ +
– –
+
Fig. 7: Configuration of all four of the plug pins
If the ambient temperature is low, heating mode can be used to warm-up
the unit. For safety reasons, heating mode only ever operates for 60 s,
the unit then automatically switches back to a mode with a lower power
+ consumption.
If the heat output during the unit's heating cycle is not sufficient, the
heating cycle can be repeated by briefly interrupting (> 5 ms) and then
+
reconnecting the power supply voltage.
–
NOTE!
Overheating and destruction of the components!
+
The unit components must not exceed a temperature of 80°C.
The unit's fluid channels are blocked during the heating operation.
Also refer to the control diagram in chapter "Start-up /
Functions".
Pin 4
Pin 3
Pin 2
Pin 1
english
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