Function of UA 300 D
20
Version 2.03 27. Juni 2008
3.2.6 Door contact
Controller type: UR 141
When working with coldrooms, 230 V inputs are each connected to a coldroom door contact. Cooling and the
evaporator fan are stopped when the coldroom door is opened.
Door Contact 1 can be activated via the digital input Input 1 (terminal D11/D12).
Door Contact 2 can be activated via the digital input Input 3 (terminal D31/D32).
Switch−off conditions:
If the high temperature alarm setpoint (on room sensor) or the maximum door open time is exceeded, cooling
and the evaporator fan will be restarted before the door is closed. High room temperature (high temperature
alarm) also prevents switching off.
3.2.7 Temperature reading offset
An offset (parameter Offset in Men 6−2−2) can be applied to temperature values as a means of compensating
differences between readings on thermometers in the refrigerated display case and on the case controller. This
offset has no effect on control (cooling, defrosting, etc.).
3.2.8 Setpoint toggle (day/night operation)
Controller setpoints can be entered both as a standard value and as an alternative value. Setpoint toggle allows
changing between these two values. Toggling can be made by two methods (Menu 3−3):
S EXTERNAL: By applying voltage to the 230 V digital input Input 2 (terminal D21/D22) by switch of timer
S INTERNAL: By setting toggle times on the internal clock
UA 111 X, UA 111 XP:
S The fan is stopped for an adjustable time (parameter Blind On Time in Menu 3−3). The fan resumes running
when toggling back to the standard setpoints.
UR 141:
S Setpoint toggle has no effect on fan control.
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