Carel plug-in PJ32C User Manual

plug-in
Cod. +030221881 rel. 1.5 - 26/10/10
19
Based on the factory settings, the main functions are the following:
 PJ32S: configured as a thermostat, with operation in degrees centigrade, set point at 4ºC and differential of 2ºC. The
DEFROST operation is enabled by time at 8 hour cycles lasting 30 minutes (compressor stop only). The high and low temperature
alarms are disabled. In the case of operation in continuous cycle, the duration is 4 hours and the temperature alarm is bypassed for
2 hours from the end of the cycle.
 PJ32Y, PJ32X: have the same settings as the PJ32S. Furthermore, these are programmed to manage defrosting using
electrical elements, with operation based on time for the X version, and with the second probe for the Y model. The display of the
temperature during defrosting remains on the last value acquired before the start of the defrost. There is an evaporator dripping
time of two minutes after the defrost, and the high temperature alarm is bypassed for one hour from end defrost.
 PJ32C: on top of the functions of the IR32Y, these units are set to manage the evaporator fans, which are stopped when the
compressor is off and during defrosting. Furthermore, a one minute pause is set for the fans after dripping, to allow the evaporator
to return to operating temperature before starting forced ventilation. In the IR32C, the defrost is stopped when the probe on the
evaporator measures 4ºC (defrost by temperature).
If many of the instrument’s parameters need to be modified during installation, it may be useful to set the complete configuration
of one instrument, and then copy it using the KEY accessory; in this case the operation can be performed in just a few seconds,
with a complete copy of all the parameters.
3.4 Table summarising the parameters to be checked before installation
code parameter type min max uom def
rd
control differential F 0 +19 °C/°F 2
control
parameters
L1
control set point -50 127 °C+/°F 4
d0
type of defrost (0=heating element, 1=hot gas, 2=heating
element by time, 3=hot gas by time)
C 0 1 flag 0 (*)
dI
interval between defrosts F 0 199 h 8
defrost
parameters
dt
end defrost temperature set point F -50 +127 °C/°F 4
Ad
temperature alarm delay F 0 +199 min 0
AL
low temperature relative alarm F 0 +127
°C/°F
0
alarm parameters
AH
high temperature relative alarm F 0 +127
°C/°F
0
other settings
H1
enable defrosting mod. S and selection of multifunction relay
function (alarm)
C 0 1 flag 1
Tab. 3.4.1
(*) WARNINGS:
 for all models where the second probe is not used or used for the display of the product temperature, or for the models with the
alarm relay, parameter d0 must be set for timed defrost, in this way, any alarms from the second probe are not signalled. To stop
the running of the defrost cycles, parameter dI must also be set to 0;

the S models with two probes (codes PJ32S00 and S0P) have been designed to use the second probe for measuring and
displaying the food storage temperature (Food Probe). To manage the second probe, these models are in fact programmed as Y
models, with all the corresponding parameters, but do not have the defrost relay; it is clear that they must be set so as defrosting is
not enabled, or, if necessary, only timed defrost with compressor off;

the S models with alarm relay, PJ32S20*, to use the function of programming the status of the alarm relay by parameter H1
are set as X models; as they don’t have the defrost relay they must be programmed so as defrosting is not enabled, or, if necessary,
only timed defrost with compressor off (dI=0 or dI>0 for cyclical defrost).

Carel plug-in PJ32C Specifications

General

Brand	Carel
Model	plug-in PJ32C
Category	Thermostat
Language	English