Wilo -Stratos GIGA2.0-I Einbau- Und Betriebsanleitung Seite 196

en
"External OFF" twin-head pump
System mode
Single mode
Combined mode
Fig. 65: Selectable modes for EXT. OFF with
twin-head pumps
196
Selection option
External MANUAL
External key lock
Heating/cooling switchover
Table 39: Function control input DI1 or DI2
1)
Function: see "Settings menu – Manual operation" [} 186] section.
2)
Function: see "Key lock ON" [} 208] section.
3)
To guarantee the heating/cooling switchover function operates correctly at the digital in-
put:
1. go to
"Heating & cooling" application and
2. go to
lect the "Binary input" option as switchover criterion.
Procedure with EXT. OFF for twin-head pumps
The function EXT. OFF always behaves as follows:
• EXT. OFF active: contact is open, pump is stopped (OFF).
• EXT. OFF inactive: contact is closed, pump runs in normal operation (ON).
The control input
of this pump head
switches the whole
• Main pump: Twin-head pump partner with connected differential pressure sensor
twin-head pump off.
The control input of the
partner pump switches
• Partner pump: Twin-head pump partner without connected differential pressure sensor
the partner pump off.
The configuration of the control inputs has three possible modes for EXT. OFF which can in-
fluence the behaviour of the two twin-head pump partners.
System mode
The control input of the main pump is occupied with a control cable and configured to EXT.
OFF.
The control input on the main pump switches both twin-head pump partners.
The control input of the partner pump is ignored and has no significance regardless of its
configuration. If the main pump malfunctions or if the twin-head pump connection is dis-
connected, the partner pump is also stopped.
Main pump
States EXT. OFF Behaviour of
1 Active
2 Not act-
ive
3 Active
4 Not act-
ive
Table 40: System mode
Single mode
The control input of the main pump and the control input of the partner pump are respect-
ively occupied with a control cable and configured to EXT. OFF. Each of the two pumps is in-
Installation and operating instructions • Wilo-Stratos GIGA2.0-I, Wilo-Stratos GIGA2.0-D • Ed.02/2022-07
Function control input DI1 or DI2
1)
Contact open: Pump is running in the mode set
on the pump or in mode requested via bus commu-
nication.
Contact closed: Pump is set to MANUAL.
2)
Contact open: Key lock is deactivated.
Contact closed: Key lock is activated.
3)
Contact open: "Heating" active.
Contact closed: "Cooling" active.
"Settings" menu, "Set control mode", "Setting assistant" and select the
"Settings" menu, "Set control mode", "Heating/cooling switchover" and se-
Display text
the pump for active
motor influences
Off OFF
Override OFF
(DI1/2)
On OK; normal
operation
Off OFF
Override OFF
(DI1/2)
On OK; normal
operation
Partner pump
EXT. OFF Behaviour of Display text
the pump for active
motor influences
Active Off OFF
Override OFF
(DI1/2)
Active On OK; normal
operation
Not act- Off OFF
ive Override OFF
(DI1/2)
Not act- On OK; normal
ive operation