Viessmann VITOCAL 242-G Installation And Service Instructions Manual page 145

Manual control of relays and mixers
"Relay" sub-menu
Note
Here, the relays can be activated at random.
Some actuators may still be switched ON when this menu is called up.
!
Please note
Unintentional conflicting operating situations can be created using
"manual control" (e.g. "E heating 1: On" and "secondary pump: Off").
This can lead to equipment damage.
For this reason, first set all actuators to "Off" during every operating pro-
cedure, then set the required actuators to "On".
!
Please note
If the intervals between manually switching the compressor off and on
again are too short, the compressor and the full wave soft starter may be
damaged.
After switching the compressor off, wait for at least 10 minutes before
switching it on again.
Menu item
"Device settings"
"Contractor level"
"Manual control"
"Relay"
The "RESET" key switches all
"Mixer" sub-menu
The motors for the internal and external mixers (max. 3) can be manually
adjusted here.
Valve position Three-way valve
in % Heating/DHW
(internal)
0 Heating
50 Heating/DHW
100 DHW heating
Menu item
"Device settings"
"Contractor level"
(cont.)
relays OFF, that are currently
switched ON.
Select a relay by pressing x
and y, then switch the relay
with the keys "ON" and "OFF".
"OK"
3-way mixer 3-way mixer
Heating circuit 2 "Natural cooling"
(mixer circuit)
closed closed
open open
"Manual control"
Control settings
145