PRESSCON HORNIT N2, Руководство пользователя

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3.1.9 Manual operation of the return valve (optional)
The ECONOMY A and DUO switch panels have the option of being equipped with a manual control for the return valve.
In this case, the control panel is equipped with a 3-position switch under the Touch Screen or the PRESS-display. The
controller of the return valve can be set in 3 different positions.
Position Explanation
AUT Automatic
The check valve is automatically controlled and
responds to fatal errors in the expansion system.
OPEN Open manually
The check valve is permanently open.
CLOSED Manually closed
The check valve is permanently closed.
For this switch there is an extra relay and extra connect terminals build in the switch panel. The connect terminals take
care of a normally open and a normally closed signal with +24Vac for the check valve. The 3-position switch then
determines if these contacts react automatically or open permanent in the normally or close permanent in the normally.
By connecting the check valve it is important to know how the contacts of the connect terminals react. See the overview
below.
Position Fuse clip 7. (+24Vac NC) Fuse clip 9. (+24Vac NO)
AUT Automatic on fatal alarms:
Incase fatal alarm: 0Vac
Incase no fatal alarm: +24Vac Automatic on fatal alarms:
Incase fatal alarm: +24Vac
Incase no fatal alarm: 0Vac
OPEN Permanent: +24Vac Permanent: 0Vac
CLOSED Permanent: 0Vac Permanent: +24Vac
Attention! Always consult the electrical diagram before connecting the check valve or
making a change to the switch. The switch for the manual operation of the check valve
can be performed in both 24Vac and 230Vac. This does not change the function of the
3-position switch and the connection terminals, but the power supply of the switch is
different.
0
AUT
OPEN
0
CLOSED
7. 8. 9.
+24Vac NC
-24Vac
+24Vac NO