04
CRC1100A
Operation
When operating in the field of refrigeration, temperature
controls is performed with a positive differential. The
compressor stops when the Setpoint temperature is
reached and restarts when the temperature reaches
setpoint plus the differential.
Two different defrost types can be selected : electrical (the
compressor is stopped) or at cycle inversion (warm gas;
the compressor keeps working). It is also possible to
select the interval between defrosts (and the interval count
type) and a maximum time (time-out) after which defrost
is interrupted. The same probe which controls the defrost
cycle is used to control the evaporator fans. It is possible to
set the temperature, the delay time after a defrost and the
relation of fans with the compressor.
A series of “safety controls” (delay at start-up, minimum
disable time, minimum time between activation) protects
the compressors from close starts. In case of probe error
or temperature alarm, the instrument signals the event
through acoustic signal and by closing the relay contact.
By pressing the mute key, the buzzer is silenced and the
relay contact is opened. The functions can be easily
customised by setting some programming parameters.
Other parameters allow to suit the instrument to various
applications.
Subzero Cold Room Controller CRC-1100A
Introduction
Features :
LCD with backlighting & 7 segment display to display all parameters.
2 NTC probes for cold room temp + evap. coil temperature.
O
O
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Range: -50 C to + 50 C (1 C res.)
Relay outputs : Comp Evap. Fan + Cond. Fan + Alarm.
Audible alarm.
HP/LP/OSS trip protection for compressor.
Auto/Man defrosting facility (Time/Temp based).
Special Software to indicate probable heater fault.
Digital inputs : 2nos (a) Door Switch (b) Pressure cutout.
Compressor protection algorithm.
03
CRC1100A
Items included
NO.
1.
2.
3.
4.
QTY
ITEMS
MOUNTING CLAMP
NTC SENSOR 1.5 METER
3 X 20 SCREW
CATALOG
2
1
2
2
Down & Alarm
Key
UP & Quick
Freeze Key
Set Key
Defrost Key
LCD Display
7 Segment
Display
LED
Indications
E
C
SET
SZ-CRC-1100A
Get to Know Your Controller
