User Manual

Lock individual sequences
In operating mode "Heating", the sequence assigned to function block
"Refrigeration demand" is locked.
In operating mode "Cooling", the sequence assigned to function block "Heat
demand" is locked.
Example
Locking for "Heating".
Heat / refrigeration demand
In operating mode "Heating", "Refrigeration demand relay" is locked, refrigeration
demand set continuously to 0%, and no refrigeration demand signal is sent to the
bus.
In operating mode "Cooling", the heat demand relay is locked, heat demand set
continuously to 0 %, and no heat demand signal is sent to the bus.
Locking time
To prevent the refrigeration machine from switching on immediately following
switch-off of heat generation, a locking time can be set.
Control is locked during the "Locking time"; as a result, no heat or refrigeration
demand is generated or signaled.
Excessive inl
et temperature at the refrigeration machine can damage the
refrigeration machine.
Main menu > Commissioning > Settings > Heating/cooling ch'over >
Setting values
Operating line Range Factory setting
Locking time 00.00...23.50 h.m 00.30 h.m
The "Locking time" acts also after a power failure-related switch-off of the device
and when exiting the Commissioning menu.
10.4.5 Display current state
The current state is displayed in menu "Heating/cooling ch'over":
Main menu > Heating/cooling ch'over >
Operating line Comment
2-pipe heating/cooling system Heating / Cooling
161 / 216
Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies H/C demand, H/C changeover 01.04.2010