Carel IR32M Manual page 34

'Smart' remote On/Off. For all the models
The digital input can be programmed also as remote On/Off.
When the controller is OFF:
3
the temperature is displayed;
3
the compressor anti-cycling protection (min. time between 2 switch on) is active;
3
the AUX output remains operative;
3
the measure displayed is visualized alternatively with two horizontal lines.
N.O. and N.C. alarm relay. IR32C, IR32P and IRDRC models
The AUX output working in alarm in the IR32C and IRDRC models can operate both as Normally Open and
as Normally Closed. The functioning with the N.C. alarm relay ensures the maximum security because the
alarm is active also in case of power failure or disconnection of cables.
Description of the new parameters
H1 Selection of relay 4 functioning:
1=alarm N.C., 2= alarm N.O.
Functioning up to - 50°C (for all the models) and sensor calibration (IR32Y, IR32C, IR32P and IRDRC).
The instrument can work up to -50°C. Therefore it can be used to control the temperature reducer.
The calibration is operative in the ambient temperature sensor only, that is on the displayed value.
Programmable digital inputs: list of the options
Value Meaning
A4 / A5
0 not active input
1 immediate external alarm
2 external alarm with delay
3 enabling of defrost
4 start of defrost
5 door switch
6 remote On/Off
7 curtain switch
0=auxiliary output,
Contact open=alarm active
Contact open=alarm active. Delay: see parameter A7
Contact open =defrost not enabled
Defrost is activated when the contact closes. It can be used for
real time defrosting. You only need to connect to the digital
input a real clock with power back-up, select A4=4 (if the
chosen input is Id1) or A5=4 (if the chosen input is Id2, only for
the IRDR model). To exclude cyclic defrost automatically
activated by the control, set dI=0.
Contact open=door open. When the door is open the
compressor and the fan are turned off. If H1=0 (models IR32C,
IR32P and IRDRC only) Aux output is activated to switch on
the lights. If the door stays open for a time longer than d8, the
display will begin to flash and the controller will restart the
normal functioning (compressor and fan ON, in case of need).
Contact close=ON. (On the IRDR models, if A4 =6 and A5=6
the control is ON with both the contacts OFF).
Contact closed= curtain down. If the input is selected as
curtain switch, when the contact closes the control modifies
the set point adding the value of the parameter r4. With r4=3.0
(pre-programmed value), the set is increased of 3 degrees
compared to the value used with open curtain. If the auxiliary
output is used for the light management (only for IR32C,
IR32P and IRDRC models) the curtain lowering automatically
switches off the light while the curtain raising switches it on.
33
Type Min Max U.M.
C 0 2 flag
Functioning
Cod. +030220151 - Rel. 2.1 - 04/09/98
Def
0