4.2 BDR91 Relay box Fail-Safe Mode Setup
The failsafe mode defines the relay box output relay status if the RF communication is lost (e.g. when
the room thermostat stops communicating due to discharged batteries). The factory setting keeps the
relay permanently off when communications is lost. If this factory setting needs to be changed follow the
instructions below:
1.
Enter Installer mode as described above.
2. Press the button to enter category 2 parameters.
3. Select the parameter 7:LC by pressing the button.
4. Select the fail-safe mode by pressing or buttons:
• 0-whenRFcommunicationislosttherelaywillbeheldinOFF position.
• 1-whenRFcommunicationislosttherelayoutputwillcycleat20%on80%off.
5. Press the green button to accept the change.
6.
Attach appropriate label to the relay box to indicate the selected fail-safe mode.
IMPORTANT: To enable the frost protection when RF communication is lost, select the fail-safe mode 1. For
systems with separate frost protection thermostat or where frost protection is not required select fail-safe
mode 0.
1. Press the OFF button.
2.
Press and hold the button and the two
PROGRAM and buttons together.
3. The unit will display the first parameter of installer
parameter group category 1 (from Parameter
No. 1 to 20).
4.
Press the or button to change the factory
setting. The display will flash indicating that a
change has been made.
5. Press the green button to confirm the
change. The display will stop flashing.
6. Press the button to go to the next
parameter.
7.
Press the PROGRAM button to go to Installer
parameter group category 2 (from Parameter No.
1 to 5).
8. To exit installer mode, press the AUTO, MAN or
OFF button.
4.1 Entering the Installer Mode
COPY
D A Y
DATE/
D A Y
1.. 4
MANAUTO
1 2 3 4 5 6 7
A U TO
MAN
OFF
1
PROGRAM
COPY
D A Y
DATE/
D A Y
1.. 4
1 2 3 4 5 6 7
A U TO
MAN
OFF
1 2
2
2
PROGRAM
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