Carel easy, Руководство пользователя

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7
GB
easy/easy compact +030220791 - rel. 2.0 - 30.05.2007
1. INTRODUCTION
easy and easy compact are electronic microprocessor controllers with
LED display, developed for the management of refrigerating units, display
cabinets and showcases. They exploit the experience and the success of
the previous PJ32 range, with the objective of off ering a product that
is simpler and more economical. The structure of the parameters has
as working as a thermometer and a thermostat (like the PJEZS), also
manages the defrost actuator. The frequency and duration of the defrost
can be set. The end defrost can occur according to the temperature
reached (connecting a probe to the evaporator) or by time. In addition
these models feature two probe inputs, for the control probe (room), the
defrost probe, and a digital input (this can also be confi gured as a probe).
There are two relay outputs for controlling the actuators (
compressor)
and for managing defrost . Models PJEZY and PJEZX diff er in that:
PJEZY has relays that are electrically connected together;
PJEZX has independent relays.
C models (PJEZC*)
The most complete solution for ventilated units operating at low
temperature. These models have three relays, providing complete control
of the compressor, fan and defrost management functions. The three 16
A/2H, 8 A and 8 A resistive relays have been built into a very compact case
in the versions which also feature the 230 V or 115 V power transformer,
and without compromising the performance or the reliability of the
product.
M models (PJEZM*)
Solution for simply measuring the temperature.
•
•
been enhanced with new functions for more dynamic and eff ective
management of the temperature control and defrost.
easy compact the smallest, most economical easy model, with one relay
only, and a simplifi ed display.
1.1 Main characteristics
The following table lists the main features of the easy and easy compact
controllers.
Features Models
easy easy compact
Ergonomic polycarbonate keypad with three buttons
P P
Keypad protection to prevent tampering
P P
Access to the confi guration parameters by password
P P
Digit display -199 to 999 -99 to 99
Decimal point
P P
Display in °C or °F
P P
LED display
Defrost (*) - by stopping the compressor
- heater
- hot gas
- heater with temperature control
P
P
P
P P
-
-
-
Duty setting function
P P
Continuous cycle function
P P
Relay outputs (*)
Up to two analogue inputs for NTC or PTC probes (*)
P P
Multifunction analogue or digital input (*)
P
-
In the models with at least 2 probes: display second/third probe (*)
P P
Input for CAREL IROPZKEY** programming key (*)
P P
Input for external CAREL IROPZ485 connector (RS485 network) (*)
P P
Buzzer (audible alarm signals) (*)
P
-
Fixed or removable terminals
P P
Fastening from rear or front
P P
Easy Set (rapid instrument confi guration selection)
P P
Table 1.a
(*) Check that this is available on the model in question.
Important Important
: each of the features should be checked for the model
in question.
1.2 Models
The easy and easy compact controllers diff er as regards operation, and
the number inputs and outputs.
easy models:
PJEZS (0, 1, 6, 7)*; PJEZ(X, Y)*; PJEZC* controllers and PJEZM(0, 1, 6, 7)*
thermometer only
easy compact models:
PJEZS(N, P)* controller and PJEZM(N,P)* thermometer only
Models and features
S models (PJEZS*)
The ideal solution for the management of static refrigeration units (that is,
without fan on the evaporator), operating at normal temperature (above
0ºC). This model, in fact, performs the functions of thermometer, displaying
the temperature of the unit, and electronic thermostat, activating the
compressor (or the solenoid valve in the case of multiplexed units) so as
to maintain the required temperature. Furthermore, it handles automatic
defrost by the forced shutdown of the compressor, and safety functions
through the management of the time settings.
X and Y models (PJEZX*, PJEZY*)
These are designed for the management of static units operating at
low temperature (that is, below 0ºC), which require active defrost using
electric heaters or the injection of hot gas. The PJEZ(Y,X)*, in fact, as well