Technische Alternative UVR 16x2 User Manual

Cooling circuit control
91
➢ Enable pump = Off: The pump is stopped, the mixer acts according to the setting in the
shutdown conditions for Cooling circuit pump = OFF, and the output variables remain as
they were with Enable pump ON (except for Clg circ. pump and Mixer).
➢ With time condition status OFF, the cooling circuit is switched off, unless a calendar
operating mode is active. The set flow temperature is issued as 200 °C and the effective set
room temperature as 50 °C.
➢ The values for set room temperature and set flow temperature can either be defined by the
user or can come from other sources (e.g. functions).
➢ Dew point / flow min. can be defined by the user or can come from a RFS-DL humidity
sensor, for example. The set flow temperature cannot fall below this value (+ offset values).
If the shutdown condition 'if T.flow Act. < min.' is activated, this value (+ offset values)
becomes the minimum value for that shutdown condition.
➢ The cooling circuit can be shut down via the Window contact input variable. A (digital) ON
signal leaves the cooling circuit in the current operating mode; an OFF signal activates
shutdown.
Parameters
Mixer
Control speed
Matching of the control speed to the cooling circuit (setting range 20 %
- 500 %)
Average
Sub-menu: Averaging of the outside temperature for pump shutdown
(see Average sub-chapter)
Derivative time
Utilises the Time switch function to shift the switching point of cooling
operation according to the outside temperature (see Derivative time
sub-chapter)
Shutdown conditions
Sub-menu: Pump shutdown and mixer conditions (see Shutdown
conditions sub-chapter)
Offset flow dew pt
Entry of an offset value for the Dew point / flow min. input variable
Parameters in the Average sub-menu
AVERAGE (outside temperature)
When outside temperatures form the basis of pump shutdown, fluctuations in those temperatures
can sometimes be undesirable. The option of adjusting the outside temperature is therefore
available for the purposes of pump shutdown.
For outside temperature
Filter time
Average OT for shutdown
Calculation of the adjusted outside temperature
Enter the filter time (the averaging time)
Result of the calculation (T.outside AVo)
DERIVATIVE TIME
Fixed heating times may cause cooling to start too early or too late, depending on the outside
temperature. The derivative time shifts the switching point subject to outside temperature. The
time entered is in reference to an outside temperature of +30 °C and is zero at +20 °C. For
example, if the derivative time is 1 hour and the outside temperature is 25 °C, the switching time is
brought forward by 30 minutes. The derivative time is only effective if an outside temperature
sensor is defined in the input variables. The effective derivative time according to the average
outside temperature is an output variable and can be adopted by the Time switch function.

Technische Alternative UVR 16x2 Specifications

General

Brand	Technische Alternative
Model	UVR 16x2
Category	Controller
Language	English