LEK
Electrical connection
23
VVM 240
Contact for changing the room
temperature
An external contact function can be connected to VVM
240 to change the supply temperature and in doing so
change the room temperature, for example, a room
thermostat or a timer. The contact should be potential
free and is connected between terminals 3 and 4 on
terminal block (14) on the load monitor card (2).
When the contact is made, the supply temperature is
higher or lower than the selected curve slope. The val-
ue for the change is set on menu 2.5, Compensation.
The value is adjustable between -25 and +25 °C. One
step corresponds to one degree of the calculated sup-
ply temperature.
Contact for activation of Extra hot water
An external contact function can be connected to VVM
240 for activation of the Temporary extra hot water
function. The contact should be potential free and non-
locking and is connected via the edge board connector
between positions 1 and 2 down on the lower part of
the left connection row on load monitor
card (2).
When the contact makes for at least one second, the
Temporary Extra hot water function is activated. An
automatic return to the previously set
function occurs after 24 hours.
External contacts
When FIGHTER 2010 is not docked, the charge pump
(40) runs dry and can seize up. Disconnect the pump
electrically by removing the edge board connector fit-
ted to positions 1—3 on the relay card (29).
Disconnecting the charge pump
29
NOTE!
Work behind screwed covers may only
be carried out under the supervision
of a qualified installation engineer.
Edge board connector
