FPG IN-5C08-OF, Руководство по эксплуатации продукта

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Part No. 26126 Rev. P September 2019
- 24 - 5000 Series Open Front Cabinets
ON
Time
Refrigeration
cont.
REFRIGERATED CABINETS - SERVICING
Temperature
Regulator
XR40CX Model XR40CX is a microprocessor based
controller.
It is provided with three NTC probe inputs,
the first one for temperature control, the
second one is located on the evaporator
coil, to control the defrost termination
temperature and the third one senses the
temperature of the compressor discharge pipe.
Another probe is connected to the IV Probe
input. It is located at the input side of the
evaporator coil, and is used to display the
temperature of air returning from the cabinet
interior.
The set-point temperature will be lower than
the required air temperature inside the
cabinet, because the refrigeration compressor
is controlled in response to the exit air temperature from the evaporator cooling
coils.
The instrument is fully configurable through special parameters that can be
easily programmed through the keyboard.
XR40CX
Compressor
Control
The regulation is performed according to the
temperature measured by the thermostat probe
with a positive differential from the set point: if the
temperature increases and reaches set point plus
differential the compressor is started and then
turned off when the temperature reaches the set
point value again.
In case of a fault in the thermostat probe the start and stop of the compressor
are timed through parameters
COn and COF .
XR40CX
Defrost Control Parameters are used to control the interval between defrost cycles (IdF), its
maximum length (MdF) and two defrost modes: timed or controlled by the
evaporator’s probe (P2P).
In this cabinet, the start of the defrost cycle is timed, but the cycle will be
terminated as soon as the defrost probe reaches the pre-determined
temperature.
At the end of defrost dripping time is started, its length is set in the FSt
parameter. With FSt =0 the dripping time is disabled
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