Wilo Stratos GIGA2.0-I Notice De Montage Et De Mise En Service page 217

Installation and operating instructions Wilo-Stratos GIGA2.0-I, Wilo-Stratos GIGA2.0-D
Communication interfaces: Setting and function
Selection option
3)
Heating/cooling switchover
Table 38: Function control input DI1 or DI2
1)
Function: see "Settings menu – Manual operation" [} 208] section.
2)
Function: see "Key lock ON" [} 236] section.
3)
To guarantee the heating/cooling switchover function operates correctly at the digital
input:
1. go to "Settings" menu, "Set control mode", "Setting assistant" and select the
"Heating & cooling" application and
2. go to "Settings" menu, "Set control mode", "Heating/cooling switchover" and
select the "Binary input" option as switchover criterion.
Procedure with EXT. OFF for twin-head pumps
The function EXT. OFF always behaves as follows:
ƒ
EXT. OFF active: contact is open, pump is stopped (OFF).
ƒ
EXT. OFF inactive: contact is closed, pump runs in normal operation (ON).
ƒ
Main pump: twin-head pump partner with connected differential pressure sensor
ƒ
Partner pump: twin-head pump partner without connected differential pressure
sensor
The configuration of the control inputs has three possible modes for EXT. OFF which
can influence the behaviour of the two twin-head pump partners.
"External OFF" twin-head pump
System mode
Single mode
Combined mode
Fig. 65: Selectable modes for EXT. OFF for twin-head pumps
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 disconnected, the partner pump is also stopped.
Main pump
States EXT. Behaviour
OFF of the
pump mo-
tor
1 Active Off
Function control input DI1 or DI2
Contact open: "Heating" active.
Contact closed: "Cooling" active.
The control input
of this pump head
switches the whole
twin-head pump off.
The control input of the
partner pump switches
the partner pump off.
Partner pump
Display EXT. Behaviour
text for OFF of the
active in- pump mo-
fluences tor
OFF Active Off
Override
OFF (DI1/2)
en
Display
text for
active in-
fluences
OFF
Override
OFF (DI1/2)
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