91
■ The changeover signal and the 2 enable signals are not evaluated if the Modbus
handles the control.
■ The corresponding Modbus parameters are:
– "HP
-
enable
-
bit1" (1 = enabled)
– "HP
-
enable
-
bit2" (1 = enabled)
– "ExtDemandHeatingCooling" (1 = cooling)
– "ExtSetvalue" (-10 = -10 °C or if the minimum value for the selected configu-
ration is not as low, only the permissible minimum value is set. 100 = 100 °C
or if the maximum value of the selected heat pump is lower, then the maximum
value of the selected heat pump.
Heating/cooling
■
"Heating only"
: The cooling function is switched off.
Control function
■
"External set value"
: The set flow temperature is defaulted directly by external
means or via Modbus.
■
"Fixed set value"
: The set values for heating and cooling are fixed if this is
selected.
■
"No set value"
: The compressors run for as long as they are enabled, provided
that there is no alarm signal.
Min. pause duration in minutes
■ Min. pause duration following the last shutdown
Electrical connections for external control
Signal
Scheme page
El. scheme connection
Enable signal 1
19
19 x 4
Enable signal 2
19
19 x 6
Enable signal 3
19
19 x 8
Set value, analogue sig-
nal
18
19 x 4
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5848 449 GB
Service
