Emerson Dixell XR60CH - User Manual

1592038000 XR60CH GB r1.0 05.05.2014 XR60CH 1/4
Digital controller with defrost and fans management
XR60CH
CONTENTS
1. GENERAL WARNING __________________________________________________________ 1
2. GENERAL DESCRIPTION ______________________________________________________ 1
3. CONTROLLING LOADS ________________________________________________________ 1
4. FRONT PANEL COMMANDS ____________________________________________________ 1
5. MAX & MIN TEMPERATURE MEMORIZATION _____________________________________ 1
6. MAIN FUNCTIONS ____________________________________________________________ 2
7. PARAMETERS _______________________________________________________________ 2
8. DIGITAL INPUT (ENABLED WITH P3P = N) ________________________________________ 3
9. TTL SERIAL LINE – FOR MONITORING SYSTEMS _________________________________ 3
10. X-REP OUTPUT – OPTIONAL ___________________________________________________ 3
11. INSTALLATION AND MOUNTING ________________________________________________ 3
12. ELECTRICAL CONNECTIONS___________________________________________________ 3
13. HOW TO USE THE HOT KEY ___________________________________________________ 3
14. ALARM SIGNALS _____________________________________________________________ 3
15. TECHNICAL DATA ____________________________________________________________ 4
16. CONNECTIONS ______________________________________________________________ 4
17. DEFAULT SETTING VALUES ___________________________________________________ 4
1. GENERAL WARNING
1.1 PLEASE READ BEFORE USING THIS MANUAL
 This manual is part of the product and should be kept near the instrument for easy and quick
reference.
 The instrument shall not be used for purposes different from those described hereunder. It
cannot be used as a safety device.
 Check the application limits before proceeding.
 Dixell Srl reserves the right to change the composition of its products, even without notice,
ensuring the same and unchanged functionality.
1.2 SAFETY PRECAUTIONS
 Check the supply voltage is correct before connecting the instrument.
 Do not expose to water or moisture: use the controller only within the operating limits avoiding
sudden temperature changes with high atmospheric humidity to prevent formation of
condensation
 Warning: disconnect all electrical connections before any kind of maintenance.
 Fit the probe where it is not accessible by the End User. The instrument must not be opened.
 In case of failure or faulty operation send the instrument back to the distributor or to Dixell Srl
(see address) with a detailed description of the fault.
 Consider the maximum current which can be applied to each relay (see Technical Data).
 Ensure that the wires for probes, loads and the power supply are separated and far enough from
each other, without crossing or intertwining.
 In case of applications in industrial environments, the use of mains filters (our mod. FT1) in
parallel with inductive loads could be useful.
2. GENERAL DESCRIPTION
Model XR60CH, format 32 x 74 mm, is microprocessor based controller, suitable for applications on
medium or low temperature ventilated refrigerating units. It has three relay outputs to control
compressor, fan, and defrost, which can be either electrical or reverse cycle (hot gas). It is also
provided with three NTC or PTC probe inputs, the first one for temperature control, the second one, to
be located onto the evaporator, to control the defrost termination temperature and to managed the fan,
the third one, optional, to connect to the HOT KEY terminals to signal the condenser temperature
alarm or to display a temperature. The digital input can operate as fourth temperature probe.
The HOT KEY output allows to connect the unit, by means of the external module XJ485-CX, to a
network line ModBUS-RTU compatible such as the dIXEL monitoring units of X-WEB family. It
allows to program the controller by means the HOT KEY programming keyboard.
The instrument is fully configurable through special parameters that can be easily programmed
through the keyboard.
3. CONTROLLING LOADS
3.1 COMPRESSOR
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.
Time
Temper.
Compr.
SET
ON
In case of fault in the thermostat probe the start and stop of the compressor are timed through
parameters “COn” and “COF”.
3.2 DEFROST
Two defrost modes are available through the “tdF” parameter: defrost through electrical heater (tdF =
EL) and hot gas defrost (tdF = in). Other 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).
At the end of defrost dripping time is started, its length is set in the Fdt parameter. With Fdt =0 the
dripping time is disabled.
3.3 CONTROL OF EVAPORATOR FANS
The fan control mode is selected by means of the “FnC” parameter:
FnC = C_n: fans will switch ON and OFF with the compressor and not run during defrost;
FnC = o_n fans will run even if the compressor is off, and not run during defrost;
After defrost, there is a timed fan delay allowing for drip time, set by means of the “Fnd” parameter.
FnC = C_Y fans will switch ON and OFF with the compressor and run during defrost;
FnC = o_Y fans will run continuously also during defrost
An additional parameter “FSt” provides the setting of temperature, detected by the evaporator probe,
above which the fans are always OFF. This is used to make sure circulation of air only if his
temperature is lower than set in “FSt”.
3.3.1 Forced activation of fans
This function managed by the Fct parameter is designed to avoid short cycles of fans, that could
happen when the controller is switched on or after a defrost, when the room air warms the evaporator.
Functioning: if the difference of temperature between the evaporator and the room probes is more
than the value of the Fct parameter, the fans are switched on. With Fct=0 the function is disabled.
3.3.2 Cyclical activation of the fans with compressor off.
When Fnc = c-n or c-Y (fans in parallel to the compressor), by means of the Fon and FoF parameters
the fans can carry out on and off cycles even if the compressor is switched off. When the compressor
is stopped the fans go on working for the Fon time. With Fon =0 the fans remain always off, when the
compressor is off.
4. FRONT PANEL COMMANDS
: To display target set point; in programming mode it selects a parameter or confirm an
operation.
(DEF) To start a manual defrost
(UP): To see the max. stored temperature; in programming mode it browses the parameter
codes or increases the displayed value.
(DOWN) To see the min stored temperature; in programming mode it browses the parameter
codes or decreases the displayed value.
To switch the instrument off, if onF = oFF.
Not enabled.
KEY COMBINATIONS:
+

To lock & unlock the keyboard.
+ To enter in programming mode.
+ To return to the room temperature display.
4.1 USE OF LEDS
Each LED function is described in the following table.
LED
MODE
FUNCTION
ON
Compressor enabled
Flashing
Anti-short cycle delay enabled
ON
Defrost enabled
Flashing
Drip time in progress
ON
Fans enabled
Flashing
Fans delay after defrost in progress.
ON
An alarm is occurring
ON
Continuous cycle is running
ECO
ON
Energy saving enabled
°C/°F
ON
Measurement unit
°C/°F
Flashing
Programming phase
5. MAX & MIN TEMPERATURE MEMORIZATION
5.1 HOW TO SEE THE MIN TEMPERATURE
1. Press and release the n key.
2. The “Lo” message will be displayed followed by the minimum temperature recorded.
3. By pressing the n key again or by waiting 5s the normal display will be restored.
5.2 HOW TO SEE THE MAX TEMPERATURE
1. Press and release the o key.
2. The “Hi” message will be displayed followed by the maximum temperature recorded.
3. By pressing the o key again or by waiting 5s the normal display will be restored.
5.3 HOW TO RESET THE MAX AND MIN TEMPERATURE RECORDED
1. Hold press the SET key for more than 3s, while the max. or min temperature is displayed. (rSt
message will be displayed)

Summary

General Warning and Safety Precautions

Read Before Use

Manual is part of the product; keep for reference. Use only as described. Cannot be used as safety device.

Safety Precautions

Check supply voltage, avoid water/moisture, disconnect power before maintenance, keep probes inaccessible.

Controller Description and Load Control

General Description

Overview of the XR60CH microprocessor-based controller for ventilated refrigerating units.

Compressor Control

How the controller regulates compressor operation based on temperature and differential.

Defrost Control

Details on electrical or hot gas defrost, timing, and termination parameters.

Front Panel Interface

Front Panel Commands

Functions of the SET, DEF, UP, and DOWN keys for operation and programming.

LED Indicators

Explanation of the function of each LED on the controller's front panel.

Max & Min Temperature Display

How to view and reset the maximum and minimum recorded temperatures.

Main Functions and Parameter Management

Setpoint Adjustment

Procedures for viewing and changing the target setpoint value.

Manual Defrost and Parameter Changes

How to initiate a manual defrost and modify parameter values.

Hidden Menu and Keyboard Lock

Accessing advanced parameters and locking the front panel keyboard.

Continuous Cycle and On;Off Function

Operating modes for continuous compressor cycles and controller on/off.

Parameter Categories

Regulation Parameters

Parameters controlling temperature regulation, setpoints, and differentials.

Display Parameters

Settings for unit display, measurement units, and resolution.

Defrost Parameters

Configuration options for defrost cycles, types, and termination.

Fan Parameters

Settings for controlling fan operation modes, delays, and stop temperatures.

Alarm Parameters

Configuration of temperature alarms, condenser alarms, and delays.

Digital Input Configurations

Door Switch and Alarm Inputs

Configuring digital input for door switch, generic, serious, or pressure alarms.

Special Function Inputs

Using digital input to start defrost, invert action, or enable energy saving.

Digital Input Polarity

Setting the polarity for activating the digital input.

Connectivity and Utilities

TTL Serial Line for Monitoring

Connecting the controller to monitoring systems via TTL serial line.

Optional X-REP Output

Information on connecting the optional X-REP output.

Hot Key Usage

Instructions for programming the Hot Key from the instrument and vice versa.

Installation and Electrical Setup

Installation and Mounting

Guidelines for physically installing the controller on a panel.

Electrical Connections

Details on wiring the controller, including probe and power connections.

Probe Connection Best Practices

Recommendations for mounting and connecting temperature probes.

Alarm Signals and Technical Data

Alarm Signal Interpretation

Meaning of alarm messages like P1, HA, EA, CA, and their causes.

Technical Specifications

Details on housing, power supply, inputs, outputs, and operating ranges.

Wiring Diagrams and Default Settings

XR60 CH Wiring Connections

Wiring diagrams for different XR60CH models and power supplies.

Default Setting Values

A table listing the default values for various controller parameters.

Emerson Dixell XR60CH Specifications

General

Brand	Emerson
Model	Dixell XR60CH
Category	Controller
Language	English