Gardena 19032 Operator's Manual page 15

To connect the pump:
Master Channel:
The master channel M is activated as soon as a valve is activated.
For example, you can activate a garden pump via the master channel so that
the pump supplies the irrigation system whenever a valve is activated.
For example, the pump can be operated using the GARDENA
Pump Control Art. 1273 that is connected to the master channel.
&
S/N: 00000000
24 VAC
1 2
24 VAC
POWER
SUPPLY
1 2 3 4 5 6 C C C C
v Connect both cables to the cable terminals M and C of the Irrigation
Control (polarity does not have to be considered).
TOP
VALVES MASTER
3 4 5 6 C C M
PUMP
CONTROL
RESET 5s
1 2 3 4 5 6 C C C C
15