Alfa Laval AquaMicro, Installation And Service Instruction

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Alfa Laval Micro
Installation and service instruction
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7
Special functions for CM721
Service indicator 7.1
NOTE: This option only works if activated by the installer.
The 'SERVICE' indicator is displayed at set intervals as a reminder to
make a routine check of the heating system.
The ‘SERVICE’ indicator will remain on the display of the CM721 until it is
either reset or disabled by your installer. The CM721 and heating system
will continue to operate as normal.
BDR91 relay box fail safe mode setup 7.2
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 in 8.1 Entering the installer set-up mode .
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 - when RF communication is lost the relay will be held in OFF position.

1 - when RF communication is lost the relay output will cycle at 20% on 80% 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.
NOTE: To enable the frost protection when RF communication is lost, select the fail-safe mode 1. For systems