User Guide

16
Acid and fertilizer dosing pump connection
The pH and EC correction relays (2A, 240V)
have a common pin: if the pH correction
pump is on, the COMMON pin is connected
to the pH PUMP pin; if the EC pump is
activated, the COMMON pin is connected to
the FERT. PUMP pin.
• Connect one pin of the source to the COMMON pin.
• Connect the pH correction pump between the pH PUMP pin and the
remaining pin of the source.
• Connect the EC correction pump between the FERT PUMP pin and the
remaining pin of the source.
Note: Both pH and EC correction pumps must have the same operating
voltage. The rated power of the pumps can be different.
pin is the same, so that the voltage of the power source has to match the
working voltage of the selected device and both the pH and EC correction
pumps have to work at the same voltage.