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Installation Guide 7
4.1 Entering Installer Mode
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.
Move the slider switch to the OFF mode.
Press and hold the
button and the two &
buttons together.
Press the
or to
change factory setting.
The display will flash
indicating that a change
has been made.
Press the green
button to confirm the
change.
The display will stop
flashing.
Press
button to go to Installer parameter group
category 2 ( ) (from Parameter n.1 to n.14).
To exit the installer mode, move the slider switch to
the AUTO or MAN positions.
Press
button to go
to the next parameter.
The unit will display the first parameter of installer
parameter group category 1 (from Parameter n.1
to n.19) as shown
1 2
3 4
5 6
7
COPY
DAY
DAY
1..6
CM 927
DATE
PROG
A U TO
MAN
OFF
OFF