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The Master Valve (main valve) is an optional safety valve, installed upstream of the line valves; it is opened auto-
matically so that the system is only powered while watering operations are in progress.
1
Pass the required electrical cables through the protective pipe. The recommended cross-section for all
cables is 1.5 mm
2
with a length of less than 350 m: above this limit, the cross-section needs to be increased.
2
Connect the cables to the relative valves (including the Master Valve if used).
3
Join the individual wires coming from any valve terminal with a wire from the water timer (common for the
valves).
4
Remove the cable protection cover by unscrewing the self-tapping screws and make the connections to the
water timer terminal board by inserting and tightening the ends which will have been stripped by 5-6 mm;
- the common wire coming from the valves to the terminal C,
- the wire coming from the second terminal of each line valve to terminals from 1 to 4 (6 if there are 6 lines),
- the wire coming from the second terminal of the Master Valve (if used) to the terminal MV.
If a control pump is used, connect the two terminals A1 and A2 of the relay coil to the terminals MV and C
respectively, and complete the connections.
The solenoid valves and relay used must operate at 24 VAC - if a pump is used, this must only be connected
via a relay which will operate a contactor.
The Master Valve is used as an alternative to the pump relay and vice versa.
5
Attach the water timer to the bracket.
6
Insert the stripped ends (stripped by at least 5-6 mm) of the transformer cable into the two terminals AC.
7
Attach and secure the cover using the two 2.9x13 self-tapping screws.
8
Plug the transformer into the power socket.
Only use the transformer supplied with the water timer.
For Cometa Evolution 4 Zone (p/n): 8014
For Cometa Evolution 6 Zone (p/n): 8016
Cometa
Cometa
User manual
User manual
1
1
Common
Common
MAX 350m (ø 1,5 mm
2
)
MV
MV
Valve
Rain Sensor
OPTIONAL
RS
1 2
C MV
AC
AC
3 4 5 6
6
5
4
3
2
1
6
5
4
3
2
1
to pump
220 V
220 V
A1
A2
Relè Claber
cod. 90439
Master Valve
OPTIONAL
