Timing relay function for service counters (controller type UA 141)
Via a voltage pulse applied (e.g. by on-site pushbutton switch, min. 10 sec.) to the digital input 3 for the frame
heater (terminal D31/D32, (factory setting). causes the corresponding relay of the Case Controller to energize
and subsequently de-energize after completion of the set pane heater on time.
This function is available on the UA 141 supplementary to the fixed on time or enthalpy-controlled on time
functions. To ensure compatibility with earlier software versions, a fixed on time of 0% is set on the UA 141 at
first start, meaning that the pane heater is then controlled exclusively by the timing relay function. The function
ofthedigitalinputcanbeconfiguredviatheparameter„Inv. D3" (i.e. Inv. D2) in menu 6-2-4.
On time interval
The full time interval for the frame and pane heater is 10 minutes, meaning that the frame heater will be ON for
1 minute and OFF for 9 minutes when set to 10%.
Defrosting
The frame heater is off during defrosting. With the UA 131 the frame heater is always switched off during
defrosting. The frame heater is switched off according to the status of the first defrost zone. With other
controllertypes,nottheUA131,theframeheaterisnotswitchedoffduringdefrosting.
The timing relay function can be activated via digital Input 1 (terminals D11 and D12). This requires
digital Input 3 to be set as PANE ACTU. for the switch on/off function to be available.
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