Rickard MCU 2 - RTC Control Override Activation

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RICKARD 2019
MLM INTEGRATION WITH BMS
 To immediately activate a BMS command, select the Process/Master Command tab and select control
override. Press Write. The control override function selected in the BMS command tab will now be activat-
ed.
 Note that selecting the Backoff Active box will force the diffuser to control to the dead-band value con-
tained in the Backoff-band field.
 For normal control operation again, uncheck the control override box under the Process/Master Command
tab and press Write.
RTC control override activation
The MLM24 Wall thermostat (part no BT2311-5) contains a Real-Time-Clock used to activate a control override
timer. This feature is not currently available on the On-board master unit. To use the control override time fea-
ture:
 Ensure the RTC time is correctly set. Expand the Wallstat host diffuser in the Logical screen. On type 7
(WS) click on Setup/RTC and press the read button. If the time displayed is incorrect edit the value and
press write.
 Expand the Backoff/Days tab and check the boxes where a day/night control override is required.
 Where a 24 hour control override is required, typically over weekends, it can be checked under the 24H
column.
 Expand the Start time tab and enter the time required for the control override action to start.
 Expand the End time tab and enter the time required for the control override to end.
 Expand the Pre/Post timer tab and enter the pre-and/or post timer period (in minutes) if required. A val-
ue of zero will disable the pre/post BMS command.
 Expand the Pre/Post BMS Command tab and select the Pre/Post control override action required. This
command will typically be used to heat/cool a building after an extended control override period.
 Expand the Backoff BMS Cmd tab. The BMS command selects the control override action required for af-
terhours back-off.
 The final step is to expand the Process/Master Command tab and check (and Write) the control override
box. Activating this box will enable either an external BMS command or internal control override.