Daikin BRC2E52C7 Installation Manual page 37

Combination of window and key card contact logic:
● The window contact has priority over the delay timer and the setback functionality of the key card
contact:
When the window contact is opened while the key card contact is open, the delay timer will
immediately expire if it is still running and setback will not work anymore. The reset timer will
immediately start counting or will not reset when it was already running.
● The reset timer functionality of the key card contact has priority over the window contact when
returning to the previous state:
When the key card contact is opened while the window contact is open, the delay timer will start
running. When the delay timer expires the reset timer will start running. When the reset timer
expires, the previous state is updated to the "Default Reset Setting" state.
Example 1 (See
a) Remove the key card, the unit continues to work normally until the delay timer has expired.
b) Open the window before delay timer expires, the unit stops immediately. It is not possible to turn
the unit on or off, the setback functionality does not work, the delay timer stops counting and the
reset timer starts counting.
c) Insert the key card, only an update of the previous state happens. The unit is forced off and the
setback functionality is still disabled (see window contact logic):
● If the reset timer has not expired before inserting the key card, the previous state is the same
as the original state because there was only a change to the forced off state.
● If the reset timer has expired before inserting the key card, the previous state is the "Default
Reset Setting" state.
d) Close the window, the unit reverts to the previous state. The previous state is depending on the
expiration of the reset timer.
Example 2 (See
a) Open the window, the unit stops immediately. The unit cannot be turned on with the On/Off button,
the setback functionality does not work and the delay timer does not start counting.
b) Remove the key card. The delay timer starts counting.
c) Close the window. The state is the same as if the window was never opened (setback will work if
enabled).
● If the delay timer expires before closing the window, the reset timer starts counting. Closing the
window has no influence on the reset timer
● If the delay timer has not expired before closing the window, the delay timer will expire
immediately and the reset timer starts counting.
d) When the reset timer expires, the previous state is updated to the "Default Reset Setting" state.
e) Insert key card.
● If the reset timer has not expired before inserting the key card, the unit returns to the state
before the window was opened (last on state).
● If the reset timer has expired before inserting the key card, the unit goes to the "Default Reset
Setting" state.
BRC2E52C7 / BRC3E52C7
–
4P368041-1 2014.02
"Example 1" on page
"Example 2:" on page
External Input Interlock Function
37)
38)
Installation manual
36