Carel MuC2SE User Manual

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µC2SE for process chiller

Electronic controller

ENG

User manual

Integrated Control Solutions & Energy Savings

µC2SE process chiller +030220416 - rel. 2.3 - 17.05.2018

ATTENTION

CAREL bases the development of its products on several years’ experience in the HVAC field, on continuous investment in technological innovation of the product, on rigorous quality procedures and processes with in-circuit and function tests on 100% of its production, on the most innovative production technologies available on the market. CAREL and its branch offices/affiliates do not guarantee, in any case, that all the aspects of the product and the software included in the product will respond to the demands of the final application, even if the product is built according to state-ofthe-art techniques. The client (builder, developer or installer of the final equipment) assumes every responsibility and risk relating to the configuration of the product in order to reach the expected results in relation to the specific final installation and/or equipment. CAREL in this case, through specific agreements, can intervene as consultant for the positive result of the final start-up machine/application, but in no case can it be held responsible for the positive working of the final equipment/apparatus.

The CAREL product is a state-of-the-art product, whose operation is specified in the technical documentation supplied with the product or can be downloaded, even prior to purchase, from the website www.carel.com. Each CAREL product, in relation to its advanced technological level, needs a phase of definition / configuration / programming / commissioning so that it can function at its best for the specific application. The lack of such phase of study, as indicated in the manual, can cause the final product to malfunction of which CAREL cannot be held responsible. Only qualified personnel can install or carry out technical assistance interventions on the product. The final client must use the product only in the manner described in the documentation related to the product itself. Without excluding proper compliance with further warnings present in the manual, it is stressed that in any case it is necessary, for each CAREL product:  Not allow the electronic circuits getting wet. Rain, humidity and all types of liquids or condensate contain corrosive mineral substances that can

damage the electrical circuits. In any case, the product should be used and stored in environments that respect the temperature and humidity limits specified in the manual;

 Not to install the device in a particularly hot environments. Temperatures that are too high can shorten the duration of the electronic devices,

damaging them and distorting or melting the parts in plastic. In any case, the product should be used and stored in environments that respect the temperature and humidity limits specified in the manual;

 Not to try to open the device in any way different than that indicated in the manual;  Not to drop, hit or shake the device, because the internal circuits and mechanisms could suffer irreparable damage.  Not to use corrosive chemical products, aggressive solvents or detergents to clean the device;  Not to use the product in application environments different than those specified in the technical manual.

All the above reported suggestions are also valid for the control, serial boards, programming keys or however for any other accessory in the CAREL product portfolio. CAREL adopts a continuous development policy. Therefore, CAREL reserves the right to carry out modifications and improvements on any product described in this document without prior notice.

The technical data in the manual can undergo modifications without forewarning.

The liability of CAREL in relation to its own product is governed by CAREL’s general contract conditions edited on the www.carel.com and/or by specific agreements with clients; in particular, within the criteria consented by the applicable norm, in no way will CAREL, its employees or its branch offices/affiliates be responsible for possible lack of earnings or sales, loss of data and information, cost of replacement goods or services, damage to objects or persons, work interruptions, or possible direct, indirect, accidental, patrimonial, coverage, punitive, special or consequential damage in any way caused, be they contractual, out-of-contract, or due to negligence or other responsibility originating from the installation, use or inability of use of the product, even if CAREL or its branch offices/affiliates have been warned of the possibility of damage.

DISPOSAL

INFORMATION FOR THE USERS REGARDING THE CORRECT HANDLING OF WASTE ELECTRIC AND ELECTRONIC EQUIPMENT (WEEE)

With reference to European Parliament and Council Directive 2002/96/EC issued on 27 January 2003 and the related national implementation legislation, please note that:

 WEEE cannot be disposed of as municipal waste, said waste must be collected separately;  the public or private waste collection systems defined by local legislation must be used. Moreover, the equipment can be returned to the

distributor at the end of its working life when buying new equipment;

 this equipment can contain hazardous substances: improper use or incorrect disposal of such may have negative effects on human health and

on the environment;

 the symbol (crossed-out wheeley bin) shown on the product or on the packaging and on the instruction sheet indicates that the equipment has

been introduced onto the market after 13 August 2005 and that it must be disposed of separately;

 in the event of illegal disposal of electrical and electronic waste, the penalties are specified by local waste disposal legislation.

Materials warranty: 2 years (from the date of production, excluding consumables). Type-approval: the quality and safety of CAREL S.P.A. products are guaranteed by the design system and ISO 9001 certified production.

ATTENTION: separate the probe cables and the digital input cables as much as possible from the inductive load and power

cables to prevent possible electro-magnetic interference. Never introduce power cables and signal cables (including those of electric control board) into the same cable troughs..

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Content

1. INTRODUCTION ....................................................................................................................... 7

1.1 General description .................................................................................................................................................... 7

1.2 Codes ......................................................................................................................................................................... 7

1.3 Accessories ................................................................................................................................................................ 7

2. INSTALLAT .............................................................................................................................. 9

2.1 Type of fixing and dimensions .................................................................................................................................... 9

2.2 Operational layouts .................................................................................................................................................... 9

2.3 μC2SE Wiring diagram ............................................................................................................................................. 10

2.4 I/O board Wiring diagram ......................................................................................................................................... 10

2.5 Optional connection ................................................................................................................................................. 10

2.6 Inputs/outputs labelling ............................................................................................................................................ 10

2.7 Connection with CONV0/10VA0 and CONVONOFF0 modules (accessories) ........................................................ 11

2.8 Installaton ................................................................................................................................................................. 11

2.9 Programming key (copy of the set-up) ..................................................................................................................... 12

3. USER INTERFACE ................................................................................................................. 14

3.1 Display ...................................................................................................................................................................... 14

3.2 Keypad ..................................................................................................................................................................... 14

3.3 Example: timer reset ................................................................................................................................................ 14

3.4 Programming ............................................................................................................................................................ 14

3.5 Menu structure ......................................................................................................................................................... 15

4. COMMISSIONING .................................................................................................................. 16

4.1 Firmware version ...................................................................................................................................................... 16

4.2 Configuration ............................................................................................................................................................ 16

4.3 Minimum and maximum fan speed calculation ........................................................................................................ 17

5. FUNCTIONS ........................................................................................................................... 18

5.1 Set point ................................................................................................................................................................... 18

5.2 Probes (analogue inputs) ......................................................................................................................................... 18

5.3 Probe reading ........................................................................................................................................................... 19

5.4 Digital inputs ............................................................................................................................................................. 19

5.5 Digital outputs ........................................................................................................................................................... 20

5.6 Analogue outputs ..................................................................................................................................................... 21

5.7 Compensation .......................................................................................................................................................... 21

5.8 Low load ................................................................................................................................................................... 21

6. CONTROL ............................................................................................................................... 22

6.1 Anti-freeze ................................................................................................................................................................ 22

6.2 Anti-freeze automatic switch-on ............................................................................................................................... 22

6.3 Anti-freeze with EVD4 ............................................................................................................................................... 22

6.4 Compressors management ...................................................................................................................................... 22

6.5 Pumps management ................................................................................................................................................ 25

6.6 Compressor – evaporator pump/valve delays ......................................................................................................... 25

6.7 Fan management ..................................................................................................................................................... 26

6.8 Hot gas bypass......................................................................................................................................................... 27

6.9 Pump down .............................................................................................................................................................. 27

6.10 Heaters management .............................................................................................................................................. 27

7 PARAMETER TABLE ............................................................................................................. 28

7.1 µchiller2SE process parameters table ...................................................................................................................... 28

7.2 Variables accessible only by supervision ................................................................................................................. 31

8 ALARMS ................................................................................................................................. 32

8.1 Type of alarms .......................................................................................................................................................... 32

8.2 Alarm description ..................................................................................................................................................... 33

8.3 Alarm digital inputs/outputs ...................................................................................................................................... 35

9 TECHNICAL SPECIFICATIONS ............................................................................................. 36

9.1 Software releases .................................................................................................................................................... 37

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1. INTRODUCTION

1.1 General description

μC2SE for process chiller is a compact electronic controller designed for the complete management of the process chiller with 1 refrigerating circuit:

it can control air-water and water-water machines. The controller has 5 digital inputs, 5 digital outputs, 4 analogue inputs and 1 analogue output. It can be installed:

individually;

connected to the tLAN network with the EVD4 driver to manage the electronic expansion valve;

connected in tLAN network with inputs/outputs expansion board.

The PWM output can be converted using the following modules:

• CONV0/10A0: conversion from PWM output for SSR into a linear analogue signal 0...10 Vdc and 4...20 mA;

• CONONOFF0: conversion from PWM output for SSR into an On/Off output from relay.

Main functions

Briefly:

control of: compressor, condenser fan, water pump for evaporator and/or condenser, anti-freeze heaters, alarm signal devices;

regulation of the set-point on evaporator input probe (B1), evaporator output probe (B2) or differential (B1-B2);

condenser fan/pump speed control;

complete alarms management;

elimination of storage vessel in event of low load;

serial connection to the EVD4 driver for control of the electronic expansion valve;

serial connection to the I/O expansion board for:

connection of devices (thermostats/pressure switches) to digital inputs of the I/O board;

display of further warnings/alarms on the controller display;

selection of the digital outputs to switch-over.

1.2 Codes

Description Cod.

μC2SE 1 circuit, 2 compressors, panel assembly MCH2000050 μC2SE 1 circuit, 2 compressors, panel assembly (20 pieces) MCH2000051

μC2SE I/O board MCH2000060 RS485 optional board for μC2SE MCH2004850 Programming key for μC2SE with 230 V power supply unit PSOPZKEYA0 PWM-On/Off converter board CONVONOFF0 PWM-0...10 V converter board CONV0/10A0 Temperature probes: *** depending on the length (015= 1.5 m, 030= 3 m, 060=6 m) NTC***WP00 Pressure probes for condenser control ** depending on the pressure (13= 150 PSI, 33= 500 PSI) SPKT00**R0 Connectors kit for code MCH2000051 (multi-pack 20 pieces) MCH2CON001 Minifit connectors kit +cables measuring 1 m for code. MCH2** MCHSMLCAB0 Minifit connectors kit +cables measuring 2 m for code. MCH2** MCHSMLCAB2 Minifit connectors kit + cables measuring 3 m for code. MCH2** MCHSMLCAB3 Remote terminal for MCH2000050 for panel assembly MCH200TP00 Remote terminal for MCH2000050 for wall assembly MCH200TW00 Serial connection kit for remote terminal supervisor MCH200TSV0

Boards with PWM output for fan speed control:

4A/230 Vac MCHRTF04C0

8A/230 Vac MCHRTF08C0 12A/230 Vac MCHRTF12C0 10A/230 Vac 1 Pz. MCHRTF10C0 10A/230 Vac 10 Pz. MCHRTF10C1

1.3 Accessories

I/O board (cod. MCH2000060)

The board, connected in tLAN network to the controller, has 5 digital inputs and 5 digital outputs. The switch-over of every digital input can be associated to a determined alarm signal, shown on the controller display and also to a switch-over on the selected digital output.

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Driver for electronic expansion valve (code EVD0000400 - tLAN)

The driver, connected in tLAN network to the controller, allows to control the electronic expansion valve in the cooling circuits. The condensation pressure probe must be connected to the controller, which will send it to the driver. See the manual code +030220227.

Fan speed management board (code MCHRTF*)

Fan speed management board (code FCS3*)

The FCS range appliances are electronic three-phase voltage regulators that use the phase cut principle to regulate the output voltage supplied to the load, depending on the command signal applied to the input. They can drive asynchronous electric motors connected, for example, to axial fans, pumps, mixers, stirrers etc.

CONVONOFF0 module

Converts a PWM signal for relay in solid state into ON/OFF output obtained with a relay. The relay boards with CONVONOFF0 code, allow the ON/OFF management of the condenser fans. The command relay has a changeable power of 10 A at 250 Vac into AC1 (1/3 HP inductive).

Analogue output module(code CONV0/10A0)

Converts a PWM signal for relay in solid state into an output 0…10 Vdc or 4…20 mA. The three-phase regulators of the FCS range can be connected to the controller without the use of this module.

RS485 Converter (code MCH2004850)

Allows the controller to be connected to a supervision network with RS485 standard serial line. To do this, it is used the input normally engaged for the programming key with the double function of key input/serial communication port.

Remote terminal (code MCH200T*00)

Allows the complete configuration of the remote controller. The use of the keys and the indications on the display faithfully reproduce the μC²SE user interface. It is also possible to connect the PlantVisor to the remote control terminal via relative accessory. The version exists for panel assembly (MCH200TP00) and for wall assembly (MCH200TW00). For further information see the instruction sheet +050001065.

Programming key (code PSOPZKEY*0)

The programming keys PSOPZKEY00 and PSOPZKEYA0 for CAREL controllers allow the copying of the complete set of parameters of the μC

SE. The keys must be connected to the connector (AMP 4 pin) envisioned in the controllers and can operate with controllers powered or not. The main upload/download functions envisioned are selected via two micro switches. These are:

• loading the parameters of a controller into the key (UPLOAD);

• copying the key onto one or more controllers (DOWNLOAD).

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2. INSTALLAT

2.1 Type of fixing and dimensions

μC2SE for process chiller is supplied with connectors of different format to facilitate the electric connections. The EVD4 driver and the I/O board must be installed on DIN guide.

Dimensions (mm)

2.2 Operational layouts

Below find the structure of the tLAN network, with the μC2SE controller for process chiller, which can operate alone or with the I/O expansion board. The EVD

driver is an optional.

NETWORK STRUCTURE

Key T Evaporation temperature P Evaporation pressure B1 Evaporator input probe B2 Evaporator output probe B3/B4 Condenser probe C Condenser E Evaporator R Heater FL Flow switch CMP1/2 Compressor 1/2 EV Expansion valve EEV Electronic expansion valve F Condenser fan EP Evaporator pump CP Condenser pump

AIR – WATER CHILLER

WATER - WATER CHILLER

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2.3 μC2SE Wiring diagram

Key G 24 Vac power supply G0 Power supply reference B1…B4 Analogue inputs 1…4 ID1…ID5 Digital inputs 1…5 C1…C5 Common digital outputs 1…5 NO1…NO5 Digital outputs 1…5 normally open contact Y1 Analogue output 1

Key/SPV Connector for key/supervisor V+ Ratiometric pressure probe power supply

Tx/Rx

tLAN port

Ground

Note: l’uscita digitale 1 non è programmabile ed è destinata al compressore; gli ingressi analogici B1 e B2 sono riservati rispettivamente alle sonde ingresso e uscita evaporatore.

2.4 I/O board Wiring diagram

Key G 24 Vac power supply G0 Power supply reference ID11…ID15 Digital inputs 11…15 B8 Analogue input 8 C11…C15 Common digital outputs 11…15 NO11…NO15 Digital outputs 11…15 normally open contact V+ Ratiometric pressure probe power supply

Y2 Analogue output 2 Tx/Rx

tLAN port

Ground

2.5 Optional connection

The programming key input can be used successively for the connection to the supervision network via RS485 converter.

2.6 Inputs/outputs labelling

μC2SE I/O expansion board Analogue inputs B1…B4 B8 Digital inputs ID1…ID5 ID11…ID15 Analogue outputs Y1 Y2 Digital outputs NO1…NO5 NO11…NO15

Notes: only probe B8 can be connected to the I/O expansion board; the numbering of the digital inputs/outputs of the expansion board goes from 11 to 15.

If the serial line is connected in supervision mode, do not connect to earth the secondary terminal of the supply transformer of the control.

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2.7 Connection with CONV0/10VA0 and CONVONOFF0 modules (accessories)

The CONV0/10AVA0 and CONVONOFF0 modules allow to convert a PWM output for SSR respectively into an analogue output 0…10Vdc and into an ON/OFF output with relay. Note that with the same controller 3 different types of outputs can be obtained.

Key

CONV0/10A0 - CONVONOFF0 module CONV0/10A0 module CONVONOFF0 module

Terminal Description Terminal Description Terminal Description 1 24 Vac power supply 5 0...10 Vdc output reference 5 Normally open 2 Power supply reference 6 0...10 Vdc output 6 Common 3 PWM (+) command signal 7 4...20 mA output reference 7 Normally closed 4 PWM (-) command signal 8 4...20 mA output 8 Not connected

The command signal to terminals 3 and 4 of the CONV0/10VA0 and CONVONOFF modules is optically-isolated. This allows the power supply G, G0 can be in common with the controller power supply.

2.8 Installaton

General warnings

Disconnect power supply before working on the board during assembly, maintenance and replacement.

Do not install the controllers in environments with the following features:

• relative humidity over 90% or condensing;

• strong vibrations or blows;

• exposure to continuous jets of water;

• exposure to aggressive and polluting atmospheres (e.g. sulphuric and ammonia gases, saline mists, fumes) to prevent corrosion and/or

oxidation;

• high magnetic and/or radiofrequency interference (avoid installation of the equipment near to transmitting antennas);

• exposure of the controllers to direct solar radiation and atmospheric agents in general.

The following recommendations must be respected when connecting the controllers:

•

the incorrect connection to the power supply voltage can seriously damage the controller;

•

separate the probe cables and the digital input cables as much as possible (at least 3 cm) from the inductive load and power cables to prevent possible electro-magnetic interference. Never introduce power cables and probe cables (including those of electric control board) into the same cable conduits.

•

do not install the probe cables in the immediate vicinity of power devices (switches, magnet circuit breaker switches, etc.). Reduce the probe cable pathway as much as possible and do not allow routes that enclose power devices;

•

do not power the controller directly from the main panel power supply if also supplying power to other devices, such as switches, solenoid valves etc. which will require another transformer. The controller is not an appliance that guarantees electrical safety, but simply suitable operation: to prevent a dangerous situation being generated following a short circuit or overload, the customer must install suitable electro-mechanical cut-off devices on the lines of interest (fuses or similar).

Electric connections

Proceed as follows for installation, making reference to the wiring diagrams:

1. Connect probes and power supply: the probes can be installed up to a maximum distance of 10 metres from the controller as long as shielded

cables with minimum section of 1 mm

are used. To improve immunity to interference, it is recommended to use probes with shielded cable

(connect just one end of the shield to the electric control board earth).

2. Program the controller: see the “User interface” chapter.

3. Connect the actuators: it is preferable to connect the actuators only after having programmed the controller. It is recommended to carefully

evaluate the maximum capacities of the relays indicated in the “technical specifications”.

4. Connect the serial network: if the connection to the supervision network is envisioned via the relevant serial boards (code MCH2004850), the

system must be earthed. Make sure there is just one earth connection. In particular, the transformers secondary device, which powers the controllers, must not be connected to earth. If connection to a transformer with earthed secondary device is necessary, an isolation transformer must also be used. It is possible to connect several controllers to the same isolation transformer, however it is recommended to use one isolation transformer for every controller.

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Case 1: several controllers connected in network powered by the same transformer (G0 not connected to earth). Typical application of several controllers inside the same electric control board

Case 2: several controllers connected in network powered by the different transformers (G0 not connected to earth). Typical application of several controllers that are part of different electric control boards.

Attention:  If one transformer is used to supply both the μC

SE and the accessories, all the G0 terminals on the various controllers or the various boards must be connected to the same terminal on the secondary, and all the G terminals to the other terminal on the secondary, so as to avoid damaging the controller;

 for use in residential environments, use shielded cable (two wires + shield earthed at both ends, AWG 20-22) for the tLAN connections (EN

55014-1);

 avoid short-circuits between V+ and GND so as not to damage the controller.  perform all the maintenance and installation operations when the unit is not connected to the power supply;  separate the power cables (relay outputs) from the cables corresponding to the probes, digital inputs and serial line;  use a transformer dedicated exclusively to the electronic controllers for the power supply.

Protection against electric shock and maintenance warnings

The system made up of the control board (MCH200005*) and the other optional boards (MCH2000060, MCH2004850, MCHRTF****, CONVONOFF0, CONV0/10A0, EVD000040*) constitutes a control device to be integrated into class I or class II appliances. The class of protection against electric shock depends on how the control device is integrated into the unit built by the manufacturer. The protection against short circuits due to faulty wiring must be guaranteed by the manufacturer of the appliance that the controller will be fitted on.

2.9 Programming key (copy of the set-up)

The PSOPZKEY00 and PSOPZKEYA0 programming keys for CAREL controllers allow to copy the complete set of μC2SE parameters. The keys must be connected to the connector (AMP 4 pin) envisioned in the controllers and can operate with instruments that are live or not, according to that indicated in the user notes of the specific controller. There are two main functions envisioned and they are selected via two dip switches (situated under the battery lid). These are: loading the parameters of a controller into the key (UPLOAD); copying the key onto one or more controllers (DOWNLOAD.

Parameters can only be copied via controllers with the same code. The data loading operation into the key (UPLOAD) is always allowed. To facilitate identification of the key to be used, CAREL has enclosed a label on which the programming loaded can be described or the machine to which it refers.

The key can only be used on μC2SE controllers that have the same Firmware version.

UPLOAD - copy parameters from controller to key

Procedure:

 open the rear door of the key and position the two dip-switches at OFF. Close the door;  connect the key to the controller terminal;  press the key button and hold, checking the signalling sequence of the LED: from red, it turns green after a few seconds;  if the signalling sequence is that indicated above, the copying operation has been successful (green LED on); the button can be released and the

key disconnected from the instrument. In the event of different signals: if the green LED does not switch on or if flashing, there is a problem. See the following table for the meanings of the signals.

DOWNLOAD - copy the parameters from the key to controller

Procedure:

 open the rear door of the key and position dip-switch n. 1 at OFF and dip-switch n. 2 at ON. Close the door;  connect the key to the controller;  press the key button and hold, checking the signalling sequence of the LED: from red, it turns green after a few seconds;  if the signalling sequence is that indicated above, the copying operation has been successful (green LED on); the button can be released. After a

few seconds the LED switches off and the key can be disconnected from the instrument;

 in the event of different signals: if the green LED does not switch on or if flashing, there is a problem. See the relative table for the meanings of

the signals. The operation is completed in 10 seconds. If the completed signal with green LED on is not given within this time period, it is good practice to attempt the operation again, releasing and pressing the button again. In the event of flashing, see the relative table for the meaning of the signal.

Fig.1 Fig.2

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The operation is completed in 10 seconds. If the completed signal with green LED on is not given within this time period, it is good practice to attempt the operation again, releasing and pressing the button again. In the event of flashing, see the relative table for the meaning of the signal.

signal LED

error meaning and solution

red LED flashing

Batteries flat start copy

The batteries are flat, the copy cannot be made. Replace the batteries (only

for PSOPZKEY00). Green LED flashing

Batteries flat copy end (only for PSOPZKEY00)

The copy operation has been performed correctly but at the

end of the operation the battery voltage is low.

Flashing simultaneously red/green LED (signal orange)

Instrument not compatible

The parameters set-up cannot be copied because the controller model

connected is not compatible. This error only for DOWNLOAD function, check

the controller code and copy only onto compatible codes.

Red and green LEDs on Copy error Error in the data copied. Repeat the operation, if the problem persists, check

the batteries and key connections. Red LED on stable

Data transfer error The copy operations has not terminated due to serious

data transfer or copy errors. Repeat the operation, if the problem persists,

check the batteries and key connections. LEDs off Batteries disconnected Check batteries (for PSOPZKEY00)

Power supply unit not connected

Check power supply unit (for PSOPZKEYA0)

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3. USER INTERFACE

The front panel contains the display and keyboard, made up from 4 keys, which, pressed individually or together, allow to perform all of the controller programming operations.

3.1 Display

The display features 3 digits, with the display of the decimal point between -99.9 and 99.9. Outside of this range of measurement, the value is automatically displayed without the decimal (even if internally the unit still operates considering the decimal part). In normal operation, the value displayed corresponds to the temperature read by probe B1, that is, the evaporator water inlet temperature*. During the programming it shows the codes of the parameters and their value.

(*) Viewing of the standard display can be changed via parameter b00.

Icon Colour

Meaning

With LED on With LED flashing

1, 2 Amber Compressor 1 and/or 2 on Start up request 3 ,4 Amber Not used Not used

Amber At least 1 compressor on Amber Condenser pump/fan on Start up request Amber Condenser fan active Amber Not used Not used Amber Heater on -

Red Alarm on -

Amber

Not used Not used

Amber

Chiller mode Chiller mode request

3.2 Keypad

Key Machine state Pressure mode

Loading default values Controller power supply with key pressed Return to upper level up to exit (with saving in EPROM) Single press Access to parameters type “Direct”

Selection and display of type“Direct” parameter value Confirm parameter value variation

Single press

Parameters programming via introduction of password Press for 5 s

(UP)

Value increase Single of continuous press Selection of successive parameter Single of continuous press Immediate access to values read by the probes (parameters b01, b02,…) Single press

Passage from stand-by to chiller mode and vice versa Press for 5 s

(DOWN)

Value decrease

Single or continuous press

Select previous parameter

Immediate access to values read by the probes (parameters b01, b02,…) Single press

Alarms manual reset Immediate timer reset

Press for 5 s

3.3 Example: timer reset

Pressing e simultaneously, in the timer value display phase (e.g. parameter c10), resets the same at zero and consequently cancels the maintenance request.

3.4 Programming

The parameters divide into 4 different levels according to their accessibility by the user via password and their function. Entering a certain level it is possible:

1. to access all parameters of the same level and the lower levels (S-P menu);

2. set the desired level for each parameter (L-P menu).

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Levels

“Factory”: accessible with password 66, it allows the configuration of all unit parameters; “Super User”: accessible with password 11, it allows the configuration of the Super User, User and Direct parameters; “User”: accessible with password 22, it allows the configuration of those parameters that can be set typically by the user and Direct, therefore relative to the options. “Direct”: accessible by pressing “ ” for 5 s, it allows to read the probes and any data, which can be interrogated by anyone without compromising unit operation.

Default parameters setting

To enable the setting procedure for parameters at default values (controller power supply with pressed) set the parameter H22 = 1.

1. Press “ “ and “ ” for 5 s;

2. The and symbols appear along with “00”;

3. Set the password via “ ” and “ ” and confirm with “ “;

4. Select the parameters menu (S-P) via “ ” and “ “. Confirm with “ ”;

5. Select the parameters category (A,b,c,d..) via “ ” and “ “. Confirm with “ ”;

6. Select the parameter via “ ” and “ “. Confirm with “ ”;

7. Modify the parameter value with “ ” and “ ;

8. After modification, press “ ” to confirm or “ ” to annul the modification;

9. Press “ ” to return to the previous menu;

10. To save the modifications, press “ ” several time until going back to the main menu.

Notes:

1.the parameters modified without confirmation via the “ ” key go back to the previous value;

2. if no operations are performed on the keyboard for 60 seconds, the controller exits the parameter modification menu by timeout and the changes are cancelled.

3. to modify the level of a parameter, enter the levels menu L-P and assign the desired level to each parameter.

3.5 Menu structure

The figure shows the categories of the parameters that can be selected during programming.

Par. Description Def Min Max U.M.

H22 Default parameters setting 0/1 = enabled/disabled 0 0 1 -

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4. COMMISSIONING

4.1 Firmware version

On controller switch-on the firmware version of the same can be verified, along with that of the EVD4 driver and I/O expansion board via the parameters H99, H97 and H95.

4.2 Configuration

The configuration parameters must be set during the commissioning of the controller and concern:

- the type of chiller: air-water or water-water, number of compressors and partialisation logic, enabling of compressor partialisation in high

pressure mode, enabling hot gas and pump down by-pass function;

- the configuration of the tLAN network: devices connected, type of protocol and serial address;

- the setting of the device counter, the keyboard block, the modification of the alarm relay state.

Machine parameters (par. H01, H04, H05, H12, H25, H26)

The controller allows to manage two types of chiller: air-water and water-water. Moreover, the number of compressors per circuit can be 1 or 2 with alternating operation (tandem) or compressor 1 with partialisation valve, powered according to the logic of parameter H12. Rotation is not managed in this case (see the "Regulation" chap.). The hot gas by-pass in temperature mode function allows to increase the temperature of the output water from the evaporator. See the regulation chapter.

Network parameters (par. H08, H10, H23)

The tLAN network can be composed just by the controller for process chiller, which will have the inputs/outputs for the standard machine controller. If the thermostatic expansion valve is replaced by the electronic expansion valve, the EVD

driver must be connected. If connected, the I/O expansion board allows to configure the digital inputs with 5 new warnings or alarms. Moreover, it allows each individual digital output to change on the basis of an individual alarm. The serial address identifies the controller in a RS485 network with Carel or Modbus protocol.

tLAN address configuration

The tLAN factory addresses of the I/O expansion board and of the EVD4 driver are given in the table. The tLAN address of the I/O expansion board is fixed. To modify the address of the EVD

driver, consult the manual cod +030220227.

Par. Descripton Def Min Max U.M. H99 Software version - 0 99.9 -

H97 Driver software version - 0 999 H95 Expansion board I/O software version - 0 99.9 -

Par. Description Def Min Max U.M.

H01 Chiller type

2=Air-water 4=Water-water

2 2 4 -

H04 Number of compressors per circuit

0 =1 compressor on circuit 1 1= 2 compressors tandem on circuit 1 2= Do not select 3= Do not select 4=1 compressor and a partialisation on circuit 1 5= Do not select

0 0 5 -

H05 Evaporator pump

0=Absent 1=Always on 2=On at regulator request 3=On at regulator request and timed

1 0 3 -

H12 Compressor partialisation valve

0 = Normally excited 1 = Normally unexcited 2, 3 = Do not select

1 0 3 -

H13 Pump down

0/1 = disabled/enabled

0 0 1 -

H25 Hot gas by-pass

0/1 = disabled/enabled

0 0 1 -

H26 Hot gas by-pass in stand-by

0/1= disabled/enabled

0 0 1 -

Par. Description Def Min Max U.M.

H08 Network configuration

0 = Control only 1 = Control + EVD 2, 3 = Do not select 4 = Control + IO 5 = Control + EVD + IO 6, 7 = Do not select

0 0 7 -

H10 RS485 serial address 1 1 200 H23 Network protocol

0 = Carel 1 = ModBus

0 0 1 -

Device TLAN address I/O expansion board 3 EVD4 Driver 2

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Other configuration parameters (par. c14, /23, H09, P35)

c14 establishes the number of operating hours of the compressors/pumps, expressed in hundreds of hours, over which to activate the maintenance request signal (Hc1, Hc2). c10 and c11 are read only parameters and indicate the number of operating hours of the compressors 1 and 2, expressed in hundreds of hours. c15 and c16 are read only parameters and they indicate the number of evaporator and condenser pump operating hours,

expressed in hundreds of hours. The maintenance request signal for the pumps is always Hc1. Pressing and simultaneously, in the timer value display phase, resets the same at zero and consequently to the cancellation of the maintenance request. H09 allows to disable the modification of the “Direct” and “User” parameters from keyboard; however it allows to display the parameter values. The timer reset function is also disabled. P35 allows to alter the status of the alarm relay, if it is active.

4.3 Minimum and maximum fan speed calculation

This procedure should only be performed when the fan speed control boards are used (code MCHRTF*). When ON/OFF modules are used (code CONVONOFF0) or alternatively the PWM to 0 to 10 V converters (code CONV0/10A0) are used, parameter F03 should be set to zero, and parameter F04 to the maximum value. Given the different types of motors existing on the market, it must be possible to set the voltages supplied by the circuit board corresponding to the temperatures of minimum and maximum speeds. In this regard (and if the default values are not suitable), proceed as follows:

•

set the parameter F02=0 and reset F03 and F04 to zero;

•

the condensation set point has been modified to take the output signal to the maximum value (PWM);

•

increase F04 until the fan operates at a sufficient speed (make sure that, after having stopped it, it can rotate freely when released);

•

“copy” this value to parameter F03; this sets the voltage for the minimum speed;

•

connect a voltmeter (set to AC, 250V) between the two “L” terminals (the two external contacts);

•

increase F04 until the voltage stabilises at around 2 Vac (inductive motors) or 1.6, 1.7 Vac (capacitive motors);

Once the value has been found, it will be evident that even when increasing F04 the voltage no longer decreases. Do not increase F04 further so as to avoid damaging the motor;

• restore the correct condensation set point. The operation is now completed.

Par. Description Def Min Max U.M. c10 Compressor 1 timer 0 0 800 100 h c11 Compressor 2 timer 0 0 800 100 h c14 Maintenance request threshold

0 = function disabled

0 0 100 100 h

c15 Evaporator pump timer 0 0 800 100 h c16 Condenser pump timer 0 0 800 100 h /23 Unit of measurement: 0/1 = °C/°F 0 0 1 H09 Lock keypad: 0/1 = disabled/enabled 1 0 1 P35 Modify alarm relay status via PRG/mute: 0/1=No/Yes 0 0 1 -

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5. FUNCTIONS

5.1 Set point

The control algorithm is the ON/OFF type according to the figure. The set point r01 can be set from a minimum value to a maximum value (par. r13, r14). The probe selected for the control depends on parameter r06, once enabled with the parameters /01 and /02. If r06 = 0,1 the probe is B1. If r06 = 2, 3, 4 the control probe is B2. A second set point value can be set from external digital input (par. r21). Instead, setting B3 or B4 as differential control probe, the relative set point control is activated, in which the set point becomes r01 plus the value read by probe B3 or B4.

Valido solo se H25=1.

r01

B1/ B2

r02

OFF

r01 + B3 or r01 + B4

B1/ B2

r02

OFF

r45 r46

For the explanation of the functions relative to the compressors, see par. 6.4.7.

5.2 Probes (analogue inputs)

The probe parameters allow to:

•

set the type and function of the probe;

•

set the offset for the correction of the reading (calibration);

•

set the maximum/minimum voltage input;

•

activate a filter to stabilize the measurement.

Par. Description Def Min Max U.M.

/01 Probe B1: 0/1 = Absent/present 1 0 1 /02 Probe B2: 0/1 = Absent/present 1 0 1 /03 Probe B3: 0 = Absent 1 = Condenser NT 2 = External NTC 3 = Differential control 0 0 3 /04 Probe B4: 0 = Absent 1 = Digital input 2 = External NTC 3 = Ratiometric Condenser 4 = Differential control 0 0 4 /09 Minimum voltage input value 50 0 /10 Vdc/100 /10 Maximum voltage input value 450 /09 500 Vdc/100 /11 Minimum pressure value 0 0 /12 bar /12 Maximum pressure value 34,5 /11 99,9 bar /13 Probe B1 calibration 0 -12 12 °C/°F /14 Probe B2 calibration 0 -12 12 °C/°F /15 Probe B3 calibration 0 -12 12 °C/°F /16 Probe B4 calibration 0 -12 12 °C/°F/ bar /21 Digital filter 4 1 15 /22 Input limitation 8 1 15 -

Par. Description Def Min Max U.M. r01 Set point 12 r13 r14 °C/°F r02 Differential 3 0,1 50 °C/°F r06 Type of regulation/compressors use

0 = Proportional input 1 = Proportional input + neutral zone 2 = Proportional output 3 = Proportional output + neutral zone 4 = Timed output with neutral zone

0 0 4 -

r13 Minimum set point -40 -40 r14 °C/°F r14 Maximum set point 80 r13 176 °C/°F r21 Set point from external contact 12 r13 r14 °C/°F r45 Relative control maximum set point 30 r46 176 °C/°F r46 Relative control minimum set point 10 -40 r45 °C/°F r47 Switch-off Differential of compressor for low temperature 1.0 0.1 10 °C/°F P08/P09/P34 Digital input selection ID1/ID2/ID5

13=2

Set point

0 0 23 -

Key r01 Set point r02 Differential r47 Switch-off Differential of compressor for low temperature, if H25 = 1 B1/B2 Evaporator input/output probe B3/B4 Differential control probe

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The probes B1/B2 have the function of input/output evaporator temperature. The probe B3 can be configured as condensation temperature probe, external or differential control. The external probe allows the activation of the external compensation algorithm. The probe B4 can have the same functions as B3 and in addition acts as digital input (can be configured from par. P13). In this case, the condenser probe is ratiometric. Parameters /09, /10, /11, /12 establish the work range of the ratiometric probe.

Example:

Input 0…4.5 Vdc on B4, /09=0, /10 = 4.5 V dc, /11 = 5, /12 = 10, /16=0

B40

Display visualization (/16=0)

4,5V

7,5

Therefore 5 will be displayed in correspondence with 0 V and 10 will be displayed in correspondence with 4.5 V. These are also the values on the basis of which control takes place.

The parameters /13…/16 allow to correct the measurement shown on the display, adding an offset of the measurement read by the probe: the value assigned to this parameter is added to the probe if positive or removed if negative.

The parameter /21 allows to establish the coefficient used in digital filtering of the value measured. High values of this parameter allow to eliminate any continuous interference at the analogue inputs (but reduces measurement immediacy). The

5.3 Probe reading

b00 allows to set the probe for standard display viewing. b01…b04 are the values read by the probes B1…B4.

EVD4 driver probes reading

The following displays appear only if an external EVD4 driver is connected, which transmits them to the controller via tLAN. b09: driver evaporation temperature. b10: driver evaporation pressure: value measured of the evaporation pressure. b11: driver superheating = superheated gas temperature – evaporation saturate temperature. b12: saturation temperature = value calculated of the evaporation saturate temperature. b13: valve position as %. b19: condenser output temperature probe.

5.4 Digital inputs

The inputs ID1…ID5 refer to the µC2SE controller. The inputs ID11…ID15 refer to the I/O expansion board. The analogue input B4 can be configured as digital input (par. P13). The following digital inputs cannot be configured (see wiring diagram):

Regarding the alarm inputs, see the “Alarms” chapter. P08: as well as the flow switch/pump thermal overload/general alarms with manual or automatic reset, it is possible to configure the digital input for:

the set point change from r01 to r21, limited by parameters r13 and r14 (minimum and maximum set-point); On/Off remote. Enabling is given by parameter H07.

P37: the digital inputs 11…15 of the I/O expansion board can be configured as: warning input Ad1…Ad5: causes only Ad1…Ad5 shown on display; alarm input Ad1…Ad5: causes the display of Ad1...Ad5 and unit switch-off.

Par. Display

0 = Probe B1 1 = Probe B2 2 = Probe B3 3 = Probe B4 4, 5, 6 = Do not select 8= Set point without compensation 9 = Set point with compensation 10 = ID remote 11 = Do not select

Def Min Max U.M.

b00 Probe B1 reading 0 0 11 b01 Probe B2 reading 0 0 0 °C/°F b02 Probe B3 reading 0 0 0 °C/°F b03 Probe B4 reading 0 0 0 °C/°F b04 Display

0 = Probe B1 1 = Probe B2 2 = Probe B3 3 = Probe B4 4, 5, 6 = Do not select 8= Set point without compensation 9 = Set point with compensation 10 = ID remote 11 = Do not select

0 0 0 °C/°F/bar

Par. Description Def Min Max U.M. b09 Driver evaporation temperature 0 0 0 °C/°F b10 Driver evaporation pressure 0 0 0 bar b11 Driver overheating 0 0 0 °C/°F b12 Driver saturation temperature 0 0 0 °C/°F b13 Driver valve position 0 0 100 % b19 Condenser output temperature probe 0 0 0 °C/°F

ID3 High pressure alarm input ID4 Low pressure alarm input

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The warnings/alarms Ad1...Ad5 can be used to switch-over the outputs NO11,....NO15 of the I/O expansion board, along with the high pressure, low

pressure alarms, etc. See parameter P42 at the "Digital outputs" paragraph.

5.5 Digital outputs

Regarding the alarm outputs configuration, see the “Alarms” chapter. The following digital output cannot be configured. Parameter H11 allows associating the digital outputs to the unit actuators (see table). The function of the other digital outputs can be configured from parameter.

To change the function of the other outputs, operate on the following parameters.

Par. Description Def Min Max U.M.

P08 Digital input 1

0=Not used 1=Flow switch alarm with manual reset 2=Flow switch alarm with automatic reset 3=General thermal overload alarm with manual reset 4=General thermal overload alarm with automatic reset 7=Thermal overload alarm with manual reset 6=Thermal overload alarm with automatic reset 7, 8, 9, 10 = Do not select 11=General alarm with manual reset 12=General alarm with automatic reset 13=2°Set-point 14…22=Do not select 23=On/Off remote

0 0 23 -

H07 Digital input On/Off: 0/1=Absent/present 0 0 1 r13 Minimum set point -40 -40 r14 °C/°F r14 Maximum set point 80 r13 176 °C/°F r21 Set-point from external contact 12 r13 r14 °C/°F P09 Digital input 2 - See P08 0 0 23 P13 Configuration of B4 as digital input if /4=1 - See P08 0 0 23 P34 Digital input 5 - See P08 0 0 23 P37 Digital input 11: 0 = not connected; 1…5 = Alarm Ad1…Ad5; 6…10 = Warning Ad1…Ad5 0 0 10 P38 Digital input 12 - See P37 0 0 10 P39 Digital input 13 - See P37 0 0 10 P40 Digital input 14 - See P37 0 0 10 P41 Digital input 15 - See P37 0 0 10 -

H11 0 1 2 3 4 5 6 NO1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 NO2 heater 1 heater 1 heater 1 - - heater 1 heater step 1 NO3 evaporator pump evaporator pump evaporator pump evaporator pump evaporator pump evaporator pump NO4 - compressor 2 (or

compressor 1 partialization)

compressor 2 (or compressor 1 partialization)

condenser fan -

NO5 alarm alarm - alarm alarm alarm alarm

7 8 9 10 11 12 NO1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 NO heater step 1 heater 1 step compressor 2 compressor 2 compressor 2 P25 NO3 - - - - - P26 NO4 heater step 2 condenser fan - heating step 1 heating step 1 P27 NO5 alarm alarm alarm alarm alarm P28

Par. Description Def Min Max U.M. P21 Alarm relay output logic: 0/1=Normally unexcited/excited 0 0 1 P25 Digital output 2

0 = No function 1 = Compressor 2 2 = Anti-freeze heater/support 1 3 = Do not select 4 = Pump/condenser fan 5, 6, 7 = Do not select 8 = Condenser fan on/off 9 = Anti-freeze heater/support 2 10 = Alarm 11 = Do not select

0 0 11 -

P26 Digital output 3 - See P25 0 0 11 P27 Digital output 4 - See P25 0 0 11 P28 Digital output 5 - See P25 0 0 11 P42 Digital output 11

0 = Not used 12 = Flow switch alarm 1…5 = Ad1…Ad5 13 = Low temperature alarm 6 = High pressure alarm 14 = High temperature alarm 7 = Do not select 15 = Low temperature alarm at start-up 8 = Low pressure alarm 16 = High temperature alarm at start-up 9 = Do not select 17 = Pump overload 10 = Circuit 1 thermal overload 18 = Do not select 11 = Do not select 12 = Flow switch alarm

0 0 18 -

P43 Digital output 12 - See P42 0 0 18 P44 Digital output 13 - See P42 0 0 18 P45 Digital output 14 - See P42 0 0 18 P46 Digital output 15 - See P42 0 0 18 -

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5.6 Analogue outputs

The analogue output Y1 is set-up for the condenser fan and is active if F01 = 1. In systems with hot gas bypass function enabled, the bypass valve is commanded by the output Y1 (controller) or Y2 (I/O expansion board). See the control chapter.

5.7 Compensation

The compensation can indifferently increase or decrease the value of r01 depending on whether r17 is respectively positive or negative. r01 varies only if the external temperature (e.g.B3) exceeds r19: if B3 is over r19 there will be: r01 effective = r01 + (B3-r19)*r17 if B3 is lower than r19: St1 effective = St1

r01

r19

r01+r18

r01-r18

r17=2

r17= +0,5 r17= -0,5

r17= -2

r01_comp

Key r01_comp Set point compensation

5.8 Low load

In the systems with reduced water content, a storage tank must be provided, so that there are no continuous and rapid temperature changes in the cooled water following control intermittence. In this way, the number of compressor hourly switch-ons/offs is limited to an acceptable number. The storage tank can be eliminated in low load conditions.

Low load condition:

1. only one compressor is active;

2. the compressor is switched off after an operating period less than the value of parameter r28.

r28 therefore represents the minimum operating time of the compressor, below which the low load condition is determined. The compressor will analyse the low load status every time the compressor is switched off. If already in low load state, the time considered by the controller for the new analysis becomes r28xr29: r02”.

The low load differential is r29. This parameter represents the new differential considered by the controller during the low load condition. Specifically r02 is replaced by r29.

Par. Description Def Min Max U.M. r01

Set-point

12 r13 r14 °C/°F

r17

Compensation constant: 0 = no compensation

0 -5 5 -

r18

Maximum distance from the set-point

0,3 0,3 20 °C/°F

r19

Start compensation temperature

30 -40 176 °C/°F

Par. Description Def Min Max U.M. r27 Accumulation vessel suppression (low load)

0=Disabled 1=Enabled 2=Do not select 3=Do not select

0 0 3 -

r28 Min. compressor running time for low load 60 0 999 s r29 Low load differential 3 1 50 °C/°F

evaporator

T A N K

USER

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6. CONTROL

6.1 Anti-freeze

The anti-freeze probe is B2. The anti-freeze set-point A01 represents the temperature below which the machine passes to anti-freeze mode: alarm A1 activates and switches the alarm output. The value of A01 is limited by A07. A03 is the intervention delay time of the anti-freeze alarm when starting the machine.

A01

A02

OFF

Key

A01 Anti-freeze set-point B2 Anti-freeze probe A02 Anti-freeze differential

6.2 Anti-freeze automatic switch-on

The parameter A10 has effect if the unit is in stand-by. A10 = 1: auxiliary heater (if enabled) and pump are on at the same time on the basis of the set point A04; A10 = 2: do not select; A10 = 3: heaters only on, on the basis of the set point A04.

6.3 Anti-freeze with EVD4

With the EVD4 driver connected, A14 represents the evaporation temperature transmitted by the driver, below which the anti-freeze alarm is activated; when the alarm is active, the compressors in the circuit affected are switched off, while the pump remains on to reduce the possibility of freezing. Reset (manual or automatic, see par. P05) only occurs when the water temperature exceeds A14+A02

OFF

ALARM

A14 + A02

A14

Key A14 Anti-freeze EVD

alarm set-point A02 Differential S3 evaporation temperature probe t time

6.4 Compressors management

Digital outputs at relay (par. c01, c02, c03, c04, c05)

The parameters in question regard the minimum operating times or switch-off times of the same output or different outputs, with the purpose of protecting the compressor and preventing regulation oscillations.

For the times set to become operational, switch the controller off and back on again after programming.

Protection for the output at relay (par. c01, c02, c03)

c01 establishes the minimum activation time of the output, independently from request. c02 establishes the minimum switch-off time if the output, independently from request. c03 establishes the minimum time between two successive switch-ons of the same output.

Par. Description Def Min Max U.M. A01 Anti-freeze alarm set-point 3 A07 A04 °C/°F A07 Anti-freeze alarm set-point limit -40 -40 176 °C/°F A02 Anti-freeze alarm differential 5 0.3 122 °C/°F A03 Anti-freeze alarm delay time from switch-on 0 0 150 s

Par. Description Def Min Max U.M. A10 Anti-freeze automatic switch-on

0 = Disabled 1 = Heaters and pumps on simultaneously on A4 2 = Do not select 3 = Heaters on at A4

0 0 3 -

Par. Description Def Min Max U.M. A14 Anti-freeze EVD4 alarm set point 3 A07 A04 °C/°F A02 Anti-freeze alarm differential 5 0,3 122 °C/°F

Par. Description Def Min Max U.M. c01 Compressor minimum switch-on time 60 0 999 s c02 Compressor minimum switch-off time 60 0 999 s c03 Delays between switch-ons of the same compressor 360 0 999 s

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Protection for outputs with different relays (par. c04, c05)

c04 establishes the minimum time that must pass between successive switch-ons of 2 compressors. By delaying the connection, line overloads are prevented due to close or simultaneous peaks, c05 establishes the minimum time that must pass between the switch-off of the two compressors.

c03

OFF

CMP1

CMP2

c01 c02

c05c04

Key t Tome CMP1/2 1/2 compressor

Maximum operating time of compressor in tandem (par. c09)

In the case of 2 tandem compressors, it must be prevented that a compressor of the same circuit works over the time set (c09), if the other remains off. This to prevent the oil in common from migrating over that allowed towards the active compressor, thus preventing that the next start-up of the compressor remaining unused (FIFO logic) causes serious problems due to poor lubrication. Therefore the compressor 1 (or 2), if it must operate continuously, after time c09 will switch off leaving the task to the other, which was off. This function considers the compressor protections. A c09 value lower than a c03 value is ignored and the compressors exchange after time c03.

Compressor partialization in high pressure mode (par. P04)

The parameter enables or disables partialisation of the circuit in high pressure mode. The function is valid if the unit is provided with tandem or partialized compressors and pressure transducers. In the event of a high pressure alarm, i.e. values over P18 (with hysteresis of 0.5 bar), the controller disables one power step of the circuit of interest and waits for 10 seconds. When this interval has expired, if the alarm is still active, the unit is stopped otherwise it continues to operate in partialised mode. In this condition, the indication PH1 is displayed. This condition remains active while the pressure does not drop below the value corresponding to the maximum condenser fan speed (F05+F06). The unit re-enables the power step below this limit.

Compressors rotation (par. r05)

The rotation of the compressors allows the operating hours to be balanced either statistically, using FIFO logic, or absolutely, by counting the effective operating hours.

Settings:

r05=0: rotation disabled. The customer can use compressors with different power ratings according to the desired logic or manage the partialisation, activating/deactivating them in proportional mode. r05=1: rotation with FIFO logic for switch-on/off (the first to be switched on will be the first to be switched off and vice versa). In this way the operating hours will be optimised along with the compressor peaks, even if the compressor times will always be respected. r05=2: rotation with hours control. The compressors will have the same operating hours, as the compressor with the least operating hours is always started first, again observing the safety times. This does not however consider FIFO logic and does not optimise the starts and stops; r05=3: do not select.

Note: the FIFO or timed rotation logic is not valid in the event of compressor partialised output.

Regulation type/ compressor use (r06, r07)

r07: neutral zone. The neutral zone moves the proportional band by r07 from the set-point and is valid in all configurations, if enabled by param.r06. r06: compressors regulation type. This parameter allows to set the logic for maintenance of the set-point.

Par. Description Def Min Max U.M. r06 Type of regulation/compressors use

0 = Proportional Input 1 = Proportional Input + neutral zone 2 = Proportional output 3 = Proportional Output + neutral zone 4 = Timed output with neutral zone

0 0 4 -

r07 Neutral zone differential 2 1 50 °C/°F

Par. Description Def Min Max U.M. c04 Switch-on delay between 2 compressors 10 0 999 s c05 Switch-off delay between 2 compressors 0 0 999 s

Par. Description Def Min Max U.M. c09 Maximum operating time of compressor in tandem - 0 = function disabled 0 0 60 min

Par. Description Def Min Max U.M. P04

Enabling of compressor partialisation in high pressure mode 0=Deactivated 1=Activated 2=Do not select 3=Do not select

0 0 3 -

Par. Description Def Min Max U.M. r05

Compressors rotation 0 = Disabled 1 = FIFO type 2 = Hours balancing 3 = Do not select

0 0 3 -

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Key r01 Set point t Time r07 Neutral zone differential CMP1/2 1/2 compressor r02 Differential B1 Evaporator input probe B2 Evaporator output probe

Timed output with neutral zone (r06 = 4)

This type of regulation originates from the requirement to keep the output temperature as constant as possible, in spite of the fact that the load is variable, or the system inertia is reduced. The logic has the objective of maintaining the temperature inside the neutral zone. If outside, the compressors are activated with the logic described below, to return to neutral area, not too quickly (with integral or derivative action) or too slowly (with fixed time logic). 2 logic times are considered:

- activation time

- deactivation time.

Activation/deactivation time

Activation time

The activation time is not a set parameter, but a value between 2 selected parameters, i.e r08 and r09. As soon as the neutral zone is exited, the activation time is practically r08, while at differential end r02 the activation time is r09. Within the differential r02, the activation time varies in a linear mode between r08 and r09. This means as you move away from the set, the intervention times are reduced, in order to make the system response more dynamic.

r08

r09

r02

Activation

time

r01

r07

De-activation time

In the same way as the activation time, the deactivation time also varies depending on a maximum, i.e. the value set by the parameter r10 in correspondence of the set point temperature and a minimum, determined by parameter r11, in correspondence with the differential end for the deactivation of compressors in this mode, selected via parameter r12. Below this value the deactivation time will be the same as the minimum set to the temperature value A04, beyond which all compressors will be switched off, irrespective of times. On moving away from the set point, a more dynamic process reaction is derived.

r10

r11

r12

Deactivation

time

r01

A04

A01

Outputs activation delay (par. c06

On switch-on (intended as physical power supply of the controller), the activation of all outputs is delayed by the time set to distribute the absorptions and protect the compressor from repeated switch-ons in the event of frequent power-cuts. This means that, after this delay period, the controller will start to manage the outputs on the basis of the protections and the normal operations functions.

r06 = 0: proportional input r06 = 2: proportional output

OFF

r01

r02

CMP1

OFF

r01

r02

CMP1

CMP2

OFF

r01

r02

CMP1

OFF

r01

r02

CMP1

CMP2

r06 = 1: proportional input + neutral zone

r06 = 3: proportional output + neutral zone

OFF

r01

r02

CMP1

r07

OFF

r01

r02

CMP1

CMP2

r07

OFF

r01

r02

CMP1

r07

OFF

r01

r02

CMP1

CMP2

r07

Par. Description Def Min Max U.M. r01 Set point 12 r13 r14 °C/°F r02 Differential 3 0.1 50 °C/°F r06 Type of regulation/compressors use: 0 = Proportional input

1 = Proportional input + neutral zone 2 = Proportional output 3 = Proportional output + neutral zone 4 = Timed output with neutral zone

0 0 4 -

r07 Neutral zone differential 2 0.1 50 °C/°F r08 Output maximum activation time 120 0 999 s r09 Output minimum activation time 100 0 999 s r10 Output maximum deactivation time 120 0 999 s r11 Output minimum deactivation time 100 0 999 s r12 Compressors deactivation differential 2 0 50 °C/°F

Par. Description Def Min Max U.M.

c06 Outputs activation delay 0 0 999 s

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Compressors deactivation external temperature (par.r25)

The compressors are deactivated if the external temperature drops below the value of r25. The differential for re-activation is fixed at 1 degree. The resistances can be activated according to the relative set-points

OFF

r25

CMP

Key: CMP = Compressore B3 = Probe esterna

6.5 Pumps management

Pump operation

H05 establishes the evaporator pump operating mode. H05 = 0: pump disabled, (the flow switch alarm is ignored) H05 = 1: always on (alarm managed) H05 = 2: switched-on on regulator request (alarm managed) H05 = 3: pump activated at regular ON and OFF intervals (with compressor in OFF) according to parameters c17 and c18.

Minimum switch-on/off times

c17: below find the operating diagram of the pump in burst mode (active with H05 = 3). The burst operation is disabled in stand-by and during an alarm with pump inhibited. On switch-on it is activated after time c17. c18 represents the minimum time during which the pump remains active. See the following paragraph for compressor-pump delays c07 and c08.

Par. Description Def Min Max U.M.

c17 Pump minimum

switch-off time

30 0 150 min

c18 Pump minimum

switch-on time

3 0 15 min

c18

c07 c08

c17 c18

OFF

CMP

Key: CMP = Compressor P = Pump t = time

6.6 Compressor – evaporator pump/valve delays

Compressor-pump delays (par. c07, c08)

c07: if the evaporator pump is on at request of the regulator (H05 = 2), if necessary, the compressor is enabled after the time set. If the pump is always on (H05 = 1) it is activated after the times set by unit switch-on (c06).

c08: with the pump on by regulator call (H05=2), in the event of compressor switch-off, regulation first pilots compressor deactivation and then that of the pump. If the flow pump is always on (H05=1), it is only deactivated in standby.

Par. Description Def Min Max U.M.

c07 Pump-compressor switch-on delay 20 0 999 s c08 Compressor-pump switch-off delay 1 0 150 min

OFF

CMP

c08c07

Key: CMP = Compressor P = Pump t = time

Valve-compressor switch-on delay

c19 represents the delay time necessary to ensure that the valve opens before compressor start-up. The parameter is only available when the EVD

driver is connected.

Par. Description Def Min Max U.M.

c19

Valve-compressor switch-on delay

3 0 100 s

Par. Description Def Min Max U.M.

r25

Compressors deactivation external temperature

-40 = function deactivated

-40 -40 80 °C/°F

µC2SE process chiller +030220416 - rel. 2.3 - 17.05.2018

6.7 Fan management

Fan operation

F01 enables the condenser fan output, according to the output assigned by parameter H11. Depending on the type of fan, the controller PWM output (Y1), always active, requests the presence of optional boards:

1) CONVONOFF0 for the conversion of the PWM output into ON/OFF output;

2) CONV0/10A0 for the conversion of the PWM output into 0…10 Vdc or 4…20 mA output;

3) optional phase cut boards MCHRTF*/FCS (supplied with Triac). In this case, it is necessary to specify the voltages supplied by the Triac to the fan electric motor, corresponding to minimum and maximum speed. The value set does not correspond to the rms voltage (in Volts) applied but to a calculation unit inside the μC

SE. See the Commissioning chap. for the calculation of the fan minimum and maximum speeds. F02 sets the operating mode of the condensation fan. F02 = 0: always on at maximum speed, independently from the compressors. The fan is only off if the unit passes to stand-by;

F02 = 1: operation in parallel to compressor. The fan is on at maximum speed when the compressor is active; F02 = 2: on when the corresponding compressor is active, with ON/OFF control based on the temperature/pressure settings for the minimum and maximum speed (parameters F05-F06). When the compressors switch off, the fan deactivates irrespective of the condensing temperature/pressure.

F02 = 3: on when the relative compressor is active with speed control. When the compressor switches off, the fan also switches off irrespective of the condensing temperature/pressure. If the condenser probe is the NTC type, on compressor switch-on, there is fans peak at maximum speed for time F11, irrespective from the temperature measured. In the event of broken condenser probe, the fans are off.

F03 is the minimum threshold for the triac. If FCS, CONVONOFF0, CONV0/10A0 regulators are used, set this parameter at 0. F034 is the maximum threshold for the triac. If FCS, CONVONOFF0, CONV0/10A0 regulators are used, set this parameter at 100. F05 is the temperature/pressure set for fan speed. It determines the temperature or pressure below which the fan remains a minimum speed. In the

case of regulation ON/OFF represents the temperature or pressure below which the fan is off. F06 is the temperature/pressure differential. If the speed controller is used, it represents the differential with respect to F05 of the temperature or

pressure, above which the fan is activated at maximum speed. In the case of regulation ON/OFF represents the differential above which the fan is on. F07 is the temperature/pressure differential for switch-off. If the speed controller is used, it represents the differential, with respect to F05, below which

the fans switch off. Switch-on has a hysteresis of 1 °C or 0.5 bar if used for the condenser controller, respectively for temperature or pressure probe.

Fan switch-on

F11 is the fan peak time. It establishes the operating time at maximum speed at fan switch-on in order to combat mechanical inertia of the motor. The same timing is respected also on switch-on of the compressor (irrespective of condenser temperature/pressure), if the NTC temperature probe is selected for condenser controller and the speed control is enabled F02=3); this takes place in order to anticipate the sudden pressure increase (to which a just as quick temperature increase in the area where the probe is positioned does not necessarily correspond) and consequently improve regulation. If F11 = 0 the function is disabled, i.e. the fans are activated at minimum speed and then controlled on the basis of the condensation temperature/pressure.

F12 is the triac impulse duration. It represents the duration of the impulse applied to the triac in milliseconds. For motors with inductive behaviour, set the parameter at 2 (default). Instead, using the CONVONOFF0, CONV0/10A0 modules, FCS regulators, set the parameter at 0.

F14 is the forced ventilation time on start-up in condenser high temperature mode. It establishes the forced ventilation time at maximum speed in the event of start-up with condenser high temperature. The function is operational if the condenser probe is temperature and only for air-water chiller. On start-up of the first compressor of the circuit affected, it is assumed that the environment temperature is near to that present on the condenser; if the value measured by the condenser probe exceeds the value F05-F07, the compressor switches on and the fan of the circuit is forced to the max speed for the time set in F14.

OFF

F05

B3/B4F06

FAN

1°C/0.5 bar

F07 F0 6

F05

F03

F04

FAN SPEED

B3/B4

Par. Description Def Min Max U.M. F01 Fan

0 = absent; 1 = present

0 0 1 -

F02 Fan: operating mode

0 =Always on 1 = In parallel to compressor 2 = On/Off 3 = Speed control

0 0 3 -

F03 Minimum voltage threshold for Triac 35 0 F04 step F04 Maximum voltage threshold for Triac 75 F03 100 step F05 Fan speed set point in pressure 13 /11 /12 bar F05 Fan speed set point in temperature 35 -40 176 °C/°F F06 Fan speed differential in pressure 3 0 30 bar F06 Fan speed differential in temperature 10 0 50 °C/°F F07 Minimum fan speed differential in pressure 5 0 F05 bar F07 Minimum fan speed differential in temperature 15 0 50 °C/°F F11 Fans peak speed

0 = function disabled

0 0 120 s

F12 Triac impulse duration 2 0 10 s F14 Fan with high condensing temperature when starting

0 = Disabled

0 0 999 s

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6.8 Hot gas bypass

The hot gas by-pass in temperature mode function allows to increase the temperature of the output water from the evaporator. The output enabled is the controller analogue output Y1 (water-water chiller) or Y2 (air-water chiller) of the I/O expansion board.

Par. Description Def Min Max U.M. H25

Hot gas by-pass 0/1 = disabled/enabled

0 0 1 -

H26

Hot gas by-pass in stand-by 0/1 = disabled/enabled

0 0 1 -

6.9 Pump down

This function allows the unit to be stopped while avoiding the possible formation of liquid refrigerant inside the evaporator. When the only active compressor is called to stop, the expansion valve is closed so as to depressurise the circuit. Valid only when the driver is installed, as the driver pressure probe is used

Par. Description Def Min Max U.M. H13 Enable pump down 0 0 1 H14 Pump down minimum pressure 2 0 50 bar H15 Pump down maximum time 30 0 180 s

6.10 Heaters management

r43 defines the relationship between absolute set-point, intended as electric heaters activation threshold and relative set-point, i.e. electric heaters activation threshold referring to an operational set-point. For example, if r43 = 7, the anti-freeze/support heater will activate below the value of r01A04, instead of A04.

Par. Description Def Min Max U.M.

r43 Heaters set-point:

0=A04, A08, A11, P16, P19 absolute 1=A04, P16, P19 absolute, A08, A11 relative 2=A08, A11, P16, P19 absolute, A04 relative 3=P16, P19 absolute, A04, A08, A11 relative 4=A04, A08, A11 absolute, P16, P19 relative 5=A04 absolute, A08, A11, P16, P19 relative 6=A08, A11 absolute, A04, P16, P19 relative 7=A04, A08, A11, P16, P19 relative

7 0 7 -

Regarding the activation set-points of the heaters, when the temperature measured by the probe B1/B2 (see A06) drops below the value of the parameter A08/A11 the heater or heaters activates, if the respective outputs are set with the parameter H11.

A08

B1or B2

A09

OFF

A11

A09

Key B1/B2 Support heaters probe

Par. Description Def Min Max U.M.

A06 Auxiliary heater probe

0=Control probe (B1) 1=Anti-freeze probe (B2)

0 0 1 -

A08 Heater 1 set point (see r43) 5 A01 80 °C/°F A08 Heater 1 relative set point (see r43) 2 0 20 °C/°F A09 Heaters differential 2 0.3 50 °C/°F A11 Heater 2 set point (see r43) 7 A01 80 °C/°F A11 Heater 2 relative set point (see r43) 7 0 20 °C/°F

µC2SE process chiller +030220416 - rel. 2.3 - 17.05.2018

7 PARAMETER TABLE

7.1 µchiller2SE process parameters table

Visibility: F = fan present (F01 = 1); N = B3 NTC probe (if /03 = 1); P = B4 pressure probe (if /04 = 3); V = driver present (if H08 = 1, 5); AA = absolute anti-freeze

AR = relative anti-freeze - = always present

Variable type: A = analog; D = digital; I = Integer

Par. Description Level MIN MAX U.M. DEF. Disp. SVP CAREL ModBus® R/W Variable type Probes setting parameters: /*

/01 Probe B1

0/1 = Absent/ Present

F 0 1 - 1 - 1 1 R/W D

/02 Probe B2

0/1 = Absent/ Present

F 0 1 - 1 - 2 2 R/W D

/03 Probe B3

0 = Absent 1 = Condenser NTC 2 = External NTC 3 = Differential regulation

F 0 3 - 0 - 14 221 R/W I

/04 Probe B4

0 = Absent 1 = Digital input 2 = External NTC 3 = Ratiometric Condenser 4 = Differential regulation

F 0 4 - 0 - 15 222 R/W I

/09 Minimum voltage input value F 0 /10 Vdc/100 50 P 18 225 R/W I /10 Maximum voltage input value F /09 500 Vdc/100 450 P 19 226 R/W I /11 Minimum pressure value F 0 /12 bar 0 P 1 1 R/W A /12 Maximum pressure value F /11 99,9 bar 34,5 P 2 2 R/W A /13 Probe B1 calibration F -12 12 °C/°F 0 - 3 3 R/W A /14 Probe B2 calibration F -12 12 °C/°F 0 - 4 4 R/W A /15 Probe B3 calibration F -12 12 °C/°F 0 - 5 5 R/W A /16 Probe B4 calibration F -12 12 °C/°F /bar 0 - 6 6 R/W A /21 Digital filter U 1 15 - 4 - 20 227 R/W I /22 Input limitation U 1 15 - 8 - 21 228 R/W I /23 Unit of measurement

0/1 = °C/°F

U 0 1 - 0 - 5 5 R/W D

Par. Description Level MIN MAX U.M. DEF. Disp. SVP CAREL ModBus® R/W Variable type

Antifreeze/support heater setting parameters: A*

A01 Anti-freeze alarm set-point U A07 A04 °C/°F 3 - 11 11 R/W A A02 Anti-freeze alarm differential U 0.3 122 °C/°F 5 - 12 12 R/W A A03 Anti-freeze alarm delay time from switch-on U 0 150 s 0 - 22 229 R/W I A04 Anti-freeze heater/s set-point in stand-by (see r43) U A01 80 °C/°F 5 AA 13 13 R/W A A04 Anti-freeze heater/s relative set-point in stand-by (see r43) U 0 20 °C/°F 7 AR 77 77 R/W A A05 Anti-freeze heater/s differential in stand-by (see r43) U 0,3 50 °C/°F 10 - - R/W A A06 Auxiliary heater probe

0 = Control probe (B1) 1 = Anti-freeze probe (B2)

F 0 1 - 0 - 6 6 R/W D

A07 Anti-freeze alarm set-point limit F -40 176 °C/°F -40 - 15 15 R/W A A08 Heater 1 set-point (see r43) U A01 80 °C/°F 5 AA 16 16 R/W A A08 Heater 1 relative set-point (see r43) U 0 20 °C/°F 2 AR 78 78 R/W A A09 Heaters differential U 0,3 50 °C/°F 2 - 17 17 R/W A A10 Anti-freeze automatic switch-on

0 = Disabled 1 = Heaters and pumps on simultaneously on A4 (see r43) 2 = Do not select 3 = Heaters on at A4

U 0 3 0 - 23 230 R/W I

A11 Heater 2 set point (see r43) U A01 80 °C/°F 7 AA 67 67 R/W A A11 Heater 2 relative set point (see r43) U 0 20 °C/°F 7 AR 79 79 R/W A A14 Anti-freeze EVD4 alarm set point U A07 A04 °C/°F 3 - 81 81 R/W A

Par. Description Level MIN MAX U.M. DEF. Disp. SVP Carel ModBus® R/ W Variable type

Probes reading parameters: b*

b00 Display

0 = Probe B1 1 = Probe B2 2 = Probe B3 3 = Probe B4 4=Do not select 5=Do not select 6=Do not select 7=Do not select 8=Set point without compensation 9=Set point with compensation 10=ID remote 11=Do not select

U 0 11 - 0 - 24 231 R/W I

b01 Probe B1 reading D 0 0 °C/°F 0 - 102 102 R A b02 Probe B2 reading D 0 0 °C/°F 0 - 103 103 R A b03 Probe B3 reading D 0 0 °C/°F 0 - 104 104 R A b04 Probe B4 reading D 0 0 °C/°F/bar 0 - 105 105 R A b09 Driver evaporation temperature D 0 0 °C/°F 0 V 110 110 R A b10 Driver evaporation pressure D 0 0 bar 0 V 111 111 R A b11 Driver overheating D 0 0 °C/°F 0 V 112 112 R A b12 Driver saturation temperature D 0 0 °C/°F 0 V 113 113 R A b13 Driver valve position D 0 100 % 0 V 114 114 R A b19 Condenser output temperature probe D 0 0 °C/°F 0 V 120 120 R A

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Par. Description Level MIN MAX U.M. DEF. Disp. SVP Carel ModBus® R/W Variable type

Compressors setting parameters: c*

c01 Compressor minimum switch-on time U 0 999 s 60 - 25 232 R/W I c02 Compressor minimum switch-off time U 0 999 s 60 - 26 233 R/W I c03 Delays between switch-ons of the same compressor U 0 999 s 360 - 27 234 R/W I c04 Switch-on delay between 2 compressors U 0 999 s 10 - 28 235 R/W I c05 Switch-off delay between 2 compressors U 0 999 s 0 - 29 236 R/W I c06 Outputs activation delay U 0 999 s 0 - 30 237 R/W I c07 Pump-compressor switch-on delay U 0 999 s 20 - 31 238 R/W I c08 Compressor-pump switch-off delay U 0 150 min 1 - 32 239 R/W I c09 Maximum operating time of compressor in tandem

0 = function disabled

U 0 60 min 0 - 33 240 R/W I

c10 Compressor 1 timer D 0 800 100 h 0 - 122 122 R A c11 Compressor 2 timer D 0 800 100 h 0 - 123 123 R A c14 Maintenance request threshold: 0 = function disabled U 0 100 100 h 0 - 34 241 R/W I c15 Evaporator pump timer D 0 800 100 h 0 - 126 126 R A c16 Condenser pump timer D 0 800 100 h 0 - 127 127 R A c17 Pump minimum switch-off time U 0 150 min 30 - 35 242 R/W I c18 Pump minimum switch-on time U 0 15 min 3 - 36 243 R/W I c19 Valve-compressor switch-on delay U 0 100 s 3 - 125 332 R/W I

Par. Description Level MIN MAX U.M. DEF. Disp. SVP Carel ModBus® R/W

ariable type

Fans setting parameters: F*

F01 Fan: 0 = absent; 1 = present F 0 1 - 0 - 10 10 R/W D F02 Fan: operating mode: 0 =Always on; 1= In parallel to compressor;

2= On/Off; 3= Speed regulation

U 0 3 - 0 F 48 255 R/W I

F03 Minimum voltage threshold for Triac F 0 F04 step 35 F 49 256 R/W I F04 Maximum voltage threshold for Triac F F03 100 step 75 F 50 257 R/W I F05 Fan speed set-point in pressure U /11 /12 bar 13 FP 23 23 R/W A F05 Fan speed set-point in temperature U -40 176 °C/°F 35 FN 24 24 R/W A F06 Fan speed differential in pressure U 0 30 bar 3 FP 25 25 R/W A F06 Fan speed differential in temperature U 0 50 °C/°F 10 FN 26 26 R/W A F07 Minimum fan speed differential in pressure U 0 F05 bar 5 FP 27 27 R/W A F07 Minimum fan speed differential in temperature U 0 50 °C/°F 15 FN 28 28 R/W A F11 Fans peak speed: 0 = function disabled U 0 120 s 0 F 51 258 R/W I F12 Triac impulse duration F 0 10 ms 2 F 52 259 R/W I F14 Fan with high condensing temp. when starting: 0 = Disabled U 0 999 s 0 FN 91 298 R/W I

Par. Description Level MIN MAX U.M. DERF. Disp. SVP Carel ModBus® R/W Var. type

Machine setting parameters: H*

H01 Chiller type: 2 = Air-water; 4 = Water-water F 2 4 - 2 - 54 261 R/W I H04 Number of compressors per circuit

0 = 1 compressor 1 = 2 compressors tandem on 1 circuit 2 = Do not select 3 = Do not select 4 = 1 compressor and a partialization on circuit 1 5 = Do not select

F 0 5 - 0 - 55 262 R/W I

H05 Evaporator pump

0 = Absent 1 = Always on 2 = On at request of regulator 3 = On at regulator request and timed

F 0 3 - 1 - 56 263 R/W I

H07 Digital input On/Off: 0 = Absent; 1 = Present U 0 1 - 0 - 15 15 R/W D H08 Network configuration

0 = Control only 1 = Control + EVD 2 = Do not select 3 = Do not select 4 = Control + IO 5 = Control + EVD + IO 6 = Do not select 7 = Do not select

F 0 7 - 0 - 57 264 R/W I

H09 Lock keypad: 0 = keypad disabled; 1 = keypad enabled U 0 1 - 1 - 16 16 R/W D H10 RS485 serial address U 1 200 - 1 - 58 265 R I H11 Outputs setting (table) F 0 12 - 0 - 59 266 R/W I

0 1 2 3 4 5 6 7 8 9 10 11 12 NO1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 NO2 heater 1 heater 1 heater 1 - - heater 1 heater step 1 heater step 1 heater step 1 compressor 2 compressor 2 compressor 2 P25 NO3 evapor.pump evaporator pump evapor. pump evapor. pump evapor. pump evapor. pump - - - - - - P26 NO4 - compressor 2 (or

compressor 1 partialisation)

compressor 2 (or compressor 1 partialisation)

condenser fan - resist. step 2 condenser fan - resist. step 1 resist. step 1 P27

NO5 alarm alarm - alarm alarm alarm alarm alarm alarm alarm alarm alarm P28

H12 Compressor partialization valve: 0 = Normally excited;

1 = Normally unexcited; 2, 3 = Do not select

F 0 3 flag 1 - 60 267 R/W I

H13 Pump down: 0/1 = activated/deactivated F 0 1 - 0 V 17 17 R/W D H14 Pump down minimum pressure F 0 50 bar 2 V 37 37 R/W A H15 Pump down maximum time F 0 180 s 30 V 61 268 R/W I H22 Default parameters setting: 0 = enabled; 1 = disabled F 0 1 - 0 - 18 18 R/W D H23 Network protocol: 0 = Carel; 1 = ModBus F 0 1 - 0 - 11 11 R/W D H24 High/low temperature alarm effect

0 = No compressor stop 1 = Stop due to high temperature alarm 2 = Stop due to low temperature alarm 3 = Stop due to high or low temperature alarm

F 0 3 - 0 - 124 331 R/W I

H25 Hot gas by-pass: 0 = disabled; 1 = enabled F 0 1 - 0 - 25 25 R/W D H26 Hot gas by-pass in stand-by: 0 = disabled; 1 = enabled F 0 1 - 0 - 26 26 R/W D

µC2SE process chiller +030220416 - rel. 2.3 - 17.05.2018

Par. Description Level MIN MAX U.M. DEF. Disp. SVP Carel ModBus® R/W Variable type

Alarms setting parameters: P*

P01 Flow switch alarm delay at pump start-up U 0 150 s 20 - 63 270 R/W I P02 Flow switch alarm delay in normal conditions U 0 120 s 5 - 64 271 R/W I P03 Low pressure alarm delay at compressor start-up U 0 200 s 40 - 65 272 R/W I P04 Compressor partialization in high pressure mode

0 = Deactivated; 1 = Activated; 2 = Do not select; 3 = Do not select

U 0 3 - 0 P 66 273 R/W I

P05 Alarms reset

0=HP1/LP1/A1/Lt manual 1=HP1/LP1/A1/Lt automatic 2=HP1/A1/Lt manual; LP1 automatic 3=HP1 manual; LP1/A1/Lt automatic 4=HP1/LP1 manual; A1/Lt automatic 5=HP1/LP1 (3 times in one hour) manual; A1/Lt automatic 6=HP1/LP1 (3 times in one hour) manual; A1/Lt manual

F 0 6 - 0 - 67 274 R/W I

P07 Low pressure alarm with pressure probe: 0 = disabled; 1 = enabled F 0 1 - 0 P 68 275 R/W I P08 Digital input 1

0 = Not used 1 = Flow switch alarm with manual reset 2 = Flow switch alarm with automatic reset 3 = General overload alarm with manual reset 4 = General overload alarm with automatic reset 5 = Thermal overload alarm with manual reset 6 = Thermal overload alarm with automatic reset 7, 8, 9, 10 = Do not select 11 = General alarm with manual reset 12 = General alarm with automatic reset 13 = 2nd Set-point 14 …22 = Do not select 23 = ON/OFF remote

F 0 23 - 0 - 69 276 R/W I

P09 Digital input 2 F 0 23 - 0 - 70 277 R/W I P13 Configuration of B4 as digital input if /4=1; See P08 F 0 23 - 0 - 74 281 R/W I P15 Low pressure alarm with compressor off; 0/1=not active/active F 0 1 - 0 - 76 283 R/W I P16 High temperature threshold alarm U -40 176 °C/°F 28 AA 38 38 R/W A P16 Relative high temperature threshold alarm U 0 100 °C/°F 16 AR 82 82 R/W A P17 High temperature on switch-on alarm delay U 0 250 min 30 - 77 284 R/W I P18 High pressure alarm threshold: 0=alarm disabled F 0 99,9 bar 20 P 39 39 R/W A P19 Low temperature alarm threshold U -40 176 °C/°F 10 AA 40 40 R/W A P19 Relative low temperature alarm threshold U 0 100 °C/°F 2 AR 83 83 R/W A P20 High/low temperature on switch-on protection: 0 = disabled; 1 = enabled U 0 1 - 0 - 20 20 R/W D P21 Alarm relay output logic: 0 = Normally unexcited; 1 = Normally excited F 0 1 - 0 - 8 8 R/W D P24 Compressor action for HP/LP: 0 = switch off compressor 1; 1 = switch off compressor 2 D 0 1 0 P 21 21 R/W D P25 Digital output 2

0 = No function 1 = Compressor 2 2 = Anti-freeze heater/support 1 3 = Do not select 4 = Evaporator pump

5...7 = Do not select 8 = Condenser fan/pump on/off 9 = Anti-freeze heater/support 2 10 = Alarm 11 = Do not select

F 0 11 - 0 - 108 315 R/W I

P26 Digital output 3; See P25 F 0 11 - 0 - 109 316 R/W I P27 Digital output 4; See P25 F 0 11 - 0 - 110 317 R/W I P28 Digital output 5; See P25 F 0 11 - 0 - 111 318 R/W I P34 Digital input 5 F 0 23 - 0 - 122 329 R/W I P35 Modify alarm relay status with PRG/mute: 0 = No; 1 = Yes F 0 1 - 0 - 23 23 R/W D P36 High pressure alarm management

0 = Always; 1 = With compressor active only, after 2 s from activation

F 0 1 - 0 - 24 24 R/W D

P37 Digital input 11

0 = Not connected 1…5 = Alarm Ad1…Ad5 6…10 = Warning Ad1…Ad5

F 0 10 - 0 - 138 345 R/W I

P38 Digital input 12; See P37 F 0 10 - 0 - 139 346 R/W I P39 Digital input 13; See P37 F 0 10 - 0 - 140 347 R/W I P40 Digital input 14; See P37 F 0 10 - 0 - 141 348 R/W I P41 Digital input 15; See P37 F 0 10 - 0 - 142 349 R/W I P42 Digital output 11

0 = not used 12 = Flow switch alarm 1…5 = Ad1…Ad5 13 = Low temperature alarm 6 = High pressure alarm 14 = High temperature alarm 7 = Do not select 15 = Low temperature alarm at start-up 8 = Low pressure alarm 16 = High temperature alarm at start-up 9 = Do not select 17 = Pump thermal overload 10 = Circuit thermal overload 18 = Do not select 11 = Do not select

F 0 18 - 0 - 143 350 R/W I

P43 Digital output 12 F 0 18 - 0 - 144 351 R/W I P44 Digital output 13 F 0 18 - 0 - 145 352 R/W I P45 Digital output 14 F 0 18 - 0 - 146 353 R/W I P46 Digital output 15 F 0 18 - 0 - 147 354 R/W I

µC2SE process chiller +030220416 - rel. 2.3 - 17.05.2018

Par. Description Level MIN M AX U.M. DEF. Disp. SVP Carel ModBus® R / W Variable type

Regulation setting parameters: r*

r01 Set point D r13 r14 °C/°F 12.0 - 41 41 R/W A r02 Differential D 0.1 50 °C/°F 3.0 - 42 42 R/W A r05 Compressors rotation

0 = Disabled 1 = FIFO type 2 = Hours balancing 3 = Do not select

F 0 3 - 0 - 78 285 R/W I

r06 Type of regulation/compressors use

0 = Proportional Input 1 = Proportional Input + neutral zone 2 = Proportional output 3 = Proportional Output + neutral zone 4 = Timed output with neutral zone

F 0 4 - 0 - 79 286 R/W I

r07 Neutral zone differential F 0.1 50 °C/°F 2.0 - 45 45 R/W A r08 Output maximum activation time F 0 999 s 120 - 80 287 R/W I r09 Output minimum activation time F 0 999 s 100 - 81 288 R/W I r10 Output maximum deactivation time F 0 999 s 120 - 82 289 R/W I r11 Output minimum deactivation time F 0 999 s 100 - 83 290 R/W I r12 Compressors deactivation differential F 0 50 °C/°F 2.0 - 46 46 R/W A r13 Minimum set-point U -40 r14 °C/°F -40 - 47 47 R/W A r14 Maximum set-point U r13 176 °C/°F 80 - 48 48 R/W A r17 Compensation constant

0 = no compensation

U -5.0 5.0 - 0 - 51 51 R/W A

r18 Maximum distance from the set point U 0,3 20 °C/°F 0,3 - 52 52 R/W A r19 Start compensation temperature U -40 176 °C/°F 30 - 53 53 R/W A r21 Set point from external contact D r13 r14 °C/°F 12 - 55 55 R/W A r25 Compressors deactivation external temperature

-40 = function deactivated

D -40 80 °C/°F -40 - 65 65 R/W A

r27 Accumulation vessel suppression (low load)

0=Disabled 1=Enabled 2, 3 = Do not select

F 0 3 - 0 - 88 295 R/W I

r28 Min. compressor running time for low load F 0 999 s 60 - 89 296 R/W I r29 Low load differential F 1.0 50 °C/°F 3.0 - 58 58 R/W A r43 Heaters set-point:

0=A4, A8, A11, P16, P19 absolute 1=A4, P16, P19 absolute, A8, A11 relative 2=A8, A11, P16, P19 absolute, A4 relative 3=P16, P19 absolute, A4, A8, A11 relative 4=A4, A8, A11 absolute, P16, P19 relative 5=A4 absolute, A8, A11, P16, P19 relative 6=A8, A11 absolute, A4, P16, P19 relative 7=A4, A8, A11, P16, P19 relative

F 0 7 - 0 - 121 328 R/W I

r45 Relative regulation maximum set point D r46 176 °C/°F 30 - 84 84 R/W A r46 Relative regulation minimum set point F -40 r45 °C/°F 10 - 85 85 R/W A r47 OFF-Differential of compressor for low temperature F 0.1 10 °C/°F 1.0 - 86 86 R/W A

Par. Description Level MIN MAX U.M. DERF. Disp. SVP Carel ModBus® R/W Variable type

Firmware parameters: F - r*

H99 Software version D 0 99.9 int - - 1 208 R I H97 Driver software version D 0 99.9 int - V 3 210 R I H95 Expansion software version (I/O board) D 0 99.9 int - - 149 356 R I

7.2 Variables accessible only by supervision

On-Off 0 = Off; 1 = On

D 0 1 - 0 64 64 R/W D

Digital input 1

D 0 1 - 0 53 53 R D

Digital input 2

D 0 1 - 0 54 54 R D

Digital input 3

D 0 1 - 0 55 55 R D

Digital input 4

D 0 1 - 0 56 56 R D

Digital input 5

D 0 1 - 0 57 57 R D

Digital input B4

D 0 1 - 0 58 58 R D

Digital output 1

D 0 1 - 0 59 59 R/W D

Digital output 2

D 0 1 - 0 60 60 R/W D

Digital output 3

D 0 1 - 0 61 61 R/W D

Digital output 4

D 0 1 - 0 62 62 R/W D

Digital output 5

D 0 1 - 0 63 63 R/W D

Reset alarms

D 0 1 - 0 78 78 R/W D

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8 ALARMS

8.1 Type of alarms

The alarms cause the LED on the display to switch on. There are two types:

• serious: they cause the total switch-off of the controller: e.g. high power supply voltage, communication error with I/O expansion board;

• slight: cause one or more devices to switch off: high/low pressure alarm (compressor switch-off), anti-freeze (compressor/fan switch-off), etc. Their intervention depends on the setting of the threshold and activation delay parameters. The Eeprom alarm always generates controller block. The alarms can be always with automatic reset once the cause has been eliminated or with manual/automatic reset depending on a parameter (P05/P08). The controller digital outputs NO2…NO5 can be configured as alarm relays (parameters P25,…, P28): depending on the alarm that intervenes, the output is excited /unexcited on the basis of parameter P21.

On the basis of the following table, the alarm can cause the output to switch-over (ON), switch-off (OFF) or the output maintains the previous status (-). Instead, the I/O expansion board digital outputs can switch-over individually on the basis of a single alarm (parameters P42, …, P46).

Example: probe B1 alarm

ALARMS TABLE

Alarm display

Alarm type Reset Compressor Pump

Fan

Heater Exp.

valve

Output alarm

I/O exp. board

Superv. variable

Superv. variab. description

ariable

type

I/O Communication error with I/O board Automatic OFF OFF OFF OFF OFF OFF - - Display signal Digital HP1 High pressure Depends on P05 OFF C1-2 - ON(60”) - - ON - 41 (R) Circuit 1 alarm Digital LP1 Low pressure Depends on P05 OFF C1-2 - OFF - - ON - 41 (R) Circuit 1 alarm Digital tP General thermal overload Depends on P08 OFF OFF OFF - - ON - 45 (R) General alarm Digital tC1 Circuit 1 thermal overload Depends on P08 OFF C1-2 - OFF - - ON - 41 (R) Circuit 1 alarm Digital LA General warning Depends on P08 - - - - - ON - 50 (R) General warning Digital FL Flow switch alarm Depends on P08 OFF OFF OFF - - ON - 45 (R) General alarm Digital FLb Backup pump warning Automatic - - - - - - - 50 (R) General warning Digital E1 Probe B1 alarm Automatic OFF OFF OFF OFF - ON - 46 (R) Probes alarm Digital E2 Probe B2 alarm Automatic OFF OFF OFF OFF - ON - 46 (R) Probes alarm Digital E3* Probe B3 alarm Automatic OFF OFF OFF OFF - ON - 46 (R) Probes alarm Digital E4* Probe B4 alarm Automatic OFF OFF OFF OFF - ON - 46 (R) Probes alarm Digital Hc1-2 Comp. 1-2/pumps hour warning Automatic - - - - - - - 47 (R) Compress. warning Digital EPr EEPROM error during operation Automatic - - - - - - - 50 (R) General warning Digital EPb EEPROM error at start-up Automatic OFF OFF OFF OFF OFF OFF - 45 (R) General alarm Digital EL1 Zero crossing Automatic - - 100% - - ON - 52 (R) Fans warning Digital A1 Anti-freeze alarm Depends on P05 OFF C1-2 - OFF - - ON - 41 (R) Circuit 1 alarm Digital Ht High temperature Automatic - - - - - ON - 51 (R) Temperature warning Digital Lt Low ambient temp. Depends on P05 - - - - - ON - 51 (R) Temperature warning Digital AHt High temperature at start-up Automatic OFF - OFF OFF - - - 50 (R) General warning Digital ALt Low temperature at start-up Automatic OFF - OFF OFF - - - 50 (R) General warning Digital ELS Low supply voltage Automatic - - - - - - - 50 (R) General warning Digital EHS High supply voltage Automatic OFF OFF OFF OFF OFF OFF - 45 (R) General alarm Digital Ed1 EVD tLAN error Automatic OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital SH1 EVD overheat alarm - OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital nO1 MOP warning Automatic - - - - - - - 48 (R) EVD warning Digital LO1 LOP warning Automatic - - - - - - - 48 (R) EVD warning Digital HA1 High inlet temperature warning circ.1 Automatic - - - - - - - 48 (R) EVD warning Digital EP1 EVD Eeprom error Automatic OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital

ES1 EVD probe error Automatic OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital

EU1 Open valve EVD 1 error at start-up Automatic OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital

Eb1 EVD battery alarm Automatic OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital

L Low load warning Automatic - - - - - - - - Display signal -

Ed1 tLan EVD communication error Automatic OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital

PH1 Partialisation warning due to high

pressure

- - - - - - - - - Display signal -

Ad1 Dig. input 11 warning Manual - - - - - ON √ 86 (R)** OUT 11 state Digital Ad1 Dig. input 11 alarm Manual OFF OFF OFF OFF OFF ON √ 86 (R)** OUT 11 state Digital Ad2 Dig. input 12 warning Manual - - - - - ON √ 87 (R)** OUT 12 state Digital Ad2 Dig. input 12 alarm Manual OFF OFF OFF OFF OFF ON √ 87 (R)** OUT 12 state Digital Ad3 Dig. input 13 warning Manual - - - - - ON √ 88 (R)** OUT 13 state Digital

Par. Description Def Min Max U.M.

P05 Alarms reset

0 0 6 -

P21 Alarm relay output logic: 0/1=Normally unexcited/excited 0 0 1 -

µC2SE process chiller +030220416 - rel. 2.3 - 17.05.2018

Alarm display

Alarm type Reset Compressor Pump

Fan

Heater Exp.

valve

Output alarm

I/O exp. board

Superv. variable

Superv. variab. description

ariable

type

Ad3 Dig. input 13 alarm Manual OFF OFF OFF OFF OFF ON √ 88 (R)** OUT 13 state Digital Ad4 Dig. input 14 warning Manual - - - - - ON √ 89 (R)** OUT 14 state Digital Ad4 Dig. input 14 alarm Manual OFF OFF OFF OFF OFF ON √ 89 (R)** OUT 14 state Digital Ad5 Dig. input 15 warning Manual - - - - - ON √ 90 (R)** OUT 15 state Digital

(*): if the probe is set for compensation, the unit will continue to operate in the event of a fault. (**): status of the output selected with parameters P42…P46.

8.2 Alarm description

HP1: high pressure. The alarm is detected irrespective of the status of the pump and the compressors. The compressors are immediately stopped

(ignoring the set protection times), the alarm relay is activated, and the display starts flashing. The condensing fan is activated at maximum speed for 60 s to oppose the alarm, after which it is switched off. This alarm may also be generated when the high pressure limit is exceeded (active only when pressure transducer is fitted) set by the parameter P18, which to be enabled must be greater than 3.0 bar, due to the corresponding hysteresis. The following figure the graphics shows alarm automatic reset.

OFF

HP1

P18

P18 - 3

Key: t = time

LP1: Low pressure The alarm depends on P15, on P7 and on P3. P15=1, P07= 1: the alarm is detected after time P03 with compressors off or active depending on P15. The hysteresis for this alarm is 1 bar.

tP: General overload The alarm is detected irrespective of the status of the pump and the compressors. The compressors, the pumps and fans stop (without observing the protection times) or are inhibited from starting, the alarm relay is activated, the display flashes the corresponding message, and the LED flashes. It can be reset either manually or automatically (see par. P08, P09, P13).

tC1: Circuit thermal overload.

LA: general warning.

This represents a generic warning that appears on the display, via digital input, without modifying the operation of the unit, the alarm relay will be activated.

FL: flow switch alarm. This alarm is detected only if the pump is on (excluding the delays when starting P01 and P02 in normal conditions), irrespective of the status of the compressor. All outputs are disabled: pump, compressor (without respecting switch-off times), condenser fan and the alarm relay is activated and the display flashes. The presence of the utility water pump must be enabled (H50). It can be reset either manually or automatically (see P08, P09, P13).

OFF

P01, P02

OFF

CMP

Key: t = time

Par. Description Def Min Max U.M.

P18 High pressure alarm threshold

0=alarm disabled

20 0 99,9 bar

P36 High pressure alarm management

0 = Always 1 = With compressor active, after 2 s from activation

0 0 1 -

Par. Description Def Min Max U.M.

P01 Flow switch alarm delay at pump start-up 20 0 150 s P02 Flow alarm delay in normal conditions 5 0 120 s P03 Low pressure alarm delay at compressor start-up 40 0 200 s

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E1...E4: probe error detected also with machine in Stand-by. The presence of a probe alarm leads to the deactivation of the compressor, the condenser fan, pump and heater; the alarm relay and display flashing are activated. In the event of external probe fault and compensation function enabled, the unit continues to operate correctly, the function deactivates, a warning is activated via the alarm relay and the message appears on the display from E1 to E4 for probes B1 to B4.

Hc1, Hc2: compressors/pumps operating hour limit exceeded warning. When the number of operating hours for the compressor exceeds the maintenance threshold (see par. c14), the maintenance request signal is activated.

EPr, EPb: EEPROM error It is a parameters memorisation problem in the non-volatile machine memory (EEPROM); μC

SE continues to make the regulations with the data present in the volatile memory (RAM) if it is EPr, where there is a physical copy of all data. The configuration is lost if a power-cut occurs. The alarm relay is not activated. If the “EPb” error occurs on switch-on, the controller remains blocked.

EL1: zero crossing error warning. If the controller detects errors in the power supply voltage, it is possible to lose control of fan speed. In this case, the display will show the warning, the fans will be ordered at maximum speed only if at least one compressor is active. Reset will be automatic, so as not to penalise unit operation. The function is enabled only with F02= 3.

A1: anti-freeze alarm. A07 establishes the minimum limit that can be used to set the anti-freeze alarm set point (A01). The alarm is detected via the evaporator output water probe (B2) or, if there is an electronic expansion valve driver (EVD) connected in tLAN, on the basis of the evaporation temperature communicated by the driver itself. The temperature of the water leaving the evaporator is compared with the alarm threshold A01, while the evaporation temperature is compared with the threshold A14. The compressors are switched off immediately; the condenser fan is activated along with the alarm relay and flashing display. Whenever μC

SE is in stand by the alarm condition is not detected, but just the heaters are

managed. Reset depends on parameter P05:

1. in the event of automatic reset, the unit re-starts automatically if the temperature is above the value of A01+A02 or A14+A02.

2. in the event of manual reset, the unit re-starts manually also if the alarm is active. After time A03, the unit blocks again if the alarm remains.

OFF

A01+A02

A01

OFF

A14+A02

A14

Key: B2 = Evaporator output probe S3 = EVD

driver evaporation probe

Ht: high temperature warning. Signalling is activated if the threshold is exceeded (read by B1), which is stated in parameter P16. This is delayed on switch-on by the parameter P17 and causes switch-on of the alarm relay without deactivation of the outputs and reset is automatic when the conditions that generated it have been removed.

OFF

P16

P16 - 2

P17

Unit

Power ON

Key: P16 High temperature alarm threshold Ht High temperature alarm B1 Temperature probe t Time

Lt: low temperature warning. This alarm can be reset manually or automatically and this depends on parameter P05. The effect of the Ht/Lt alarms on the compressor depends on parameter H24.

OFF

ALt

P19

Key P19 Low temperature at switch-on alarm set Alt Low temperature on switch-on warning B1 Temperature probe t Time

Par. Description Def Min Max U.M.

A01 Anti-freeze alarm set point 3,0 A07 A04 °C/°F A07 Anti-freeze alarm threshold limit -40 -40 176 °C/°F A02 Anti-freeze alarm differential 5,0 0,3 122 °C/°F A03 Anti-freeze alarm delay time from switch-on 0 0 150 s

Par. Description Def Min Max U.M.

P16 High temperature threshold alarm 28 -40 176 °C/°F P16 Relative high temperature threshold alarm 16 0 100 °C/°F P17 High temperature on switch-on alarm delay 30 0 250 min

Par. Description

P19 Low temperature alarm threshold 10 -40 176 K/°F P19 Relative low temperature alarm threshold 2 0 100 °C/°F P20 High/low temperature on switch-on protection

0/1=disabled/enabled

0 0 1 -

H24 High/low temperature alarm effect

0: No compressor stop 1: Stop due to high temperature alarm 2: Stop due to low temperature alarm 3: Stop due to high or low temperature alarm

0 0 3 -

µC2SE process chiller +030220416 - rel. 2.3 - 17.05.2018

AHt: high temperature on plant switch-on warning. The warning does not activate the relay and displays the "AHt" message.

ALt: low temperature on plant switch-on warning. The warning does not activate the relay and displays the "Alt" message.

ELS/EHS: warning low/alarm high power supply voltage warning. If the power supply voltage is too high or too low, the relative message appears on

the display. Correct operation of μC

SE is not guaranteed. The low voltage only leads to the execution of the loads switch-off request. Any switch-on

requests remain pending. High voltage leads to switch-off of all excited relays.

L: low load condition warning. The warning does not activate the relay and displays the "L" message; reset is automatic.

Driver

All of the driver alarms that block the unit are self-resetting, for μC

SE. Therefore the possibility to select self-reset of the entire system must be

selectable from the driver itself via the relevant parameters. μC

SE can give the Go Ahead command according to the usual alarms reset procedure

from keyboard.

Ed1: tLAN communication error with the Driver. The alarm is generated after a fixed time (5 s) from when μC

SE has lost contact with the Driver. In this case, the unit is inhibited for safety reasons.

SH1: low overheating alarm. The low overheating of circuit 1 alarm, stops circuit 1 for safety reasons after a fixed period of time (5 s). The risk is that the compressors are flooded.

nO1: MOP warning (maximum operational pressure). The warning appears on the display. LO1: LOP warning (minimum operational pressure). The warning appears on the display.

HA1: evaporator high temperature warning. The warning appears on the display. EP1: EEPROM driver error. The circuit is inhibited for safety reasons, as there is no driver status. ES1: probes driver error. The circuit is inhibited for safety reasons, as there is no driver status. EU1: Valve open error EVD 1 start I, in system start-up, the driver detects the valve is still open, the alarm has passed to μC

SE, which switches the

compressors and fans off.

Eb1: EVD battery alarm. The EVD battery alarm inhibits compressor start-up to prevent the risk of liquid return from the circuit and relative fans.

8.3 Alarm digital inputs/outputs

Alarm digital inputs

The following digital inputs cannot be configured (see wiring diagram):

The configuration of the digital inputs as for flow switch/pump thermal overload/general alarms with manual/automatic reset can be performed from parameter. If the device connected to the digital input intervenes, the alarm occurs with that displayed described in the alarms table.

Alarm digital outputs

The following digital output cannot be configured.

µC

SE: the function of digital outputs as alarm can be configured from parameter (P25…P28). On occurrence of any of the alarms in the alarms table, the output selected as alarm output switches-over. I/O expansion board: the function of digital outputs as alarm can be configured from parameter (P42…P46). In this case, the output only switchesover if the selected alarm occurs.

Par. Description Def Min Max U.M.

P21

Alarm relay output logic 0/1=Normally unexcited/excited

0 0 1 0

P25

Digital output 2 selection - 10 = Alarm

0 0 11 0

P26

Digital output 3 selection - See P25

0 0 11 0

P27

Digital output 4 selection - See P25

0 0 11 0

P28

Digital output 5 selection - See P25

0 0 11 0

P42

Digital output 11 selection

0 = not used 1…5 = Ad1…Ad5 6 = Circuit 1 high pressure alarm 8 = Circuit 1 low pressure alarm 10 = Circuit 1 thermal overload 12 = Flow switch alarm 13 = Low temp. alarm 14 = High temp. alarm 15 = Low temperature alarm at start-up 16 = High temperature alarm at start-up 17 = Pump thermal overload 18 = Do not select

0 0 18 0

P43

Digital output 12 selection - See P42

0 0 18 -

P44

Digital output 13 selection - See P42

0 0 18 -

P45

Digital output 14 selection - See P42

0 0 18 -

P46

Digital output 15 selection - See P42

0 0 18 -

ID3 High pressure alarm input ID4 Low pressure alarm input

NO1 Compressor output

µC2SE process chiller +030220416 - rel. 2.3 - 17.05.2018

9 TECHNICAL SPECIFICATIONS

“Group A” is defined successively, the collection of the following outputs: valve, pump, compressor, heater.

Note: all relays must have the common (C1/2, C3/4) connected together.

Operational specifications

Analogue inputs resolution Temperature probes: interval -40T80 °C, 0.1 °C

Interval -20T20 °C, ±0.5 °C (probe excluded) Interval -40T80 °C, ±1.5 °C (probe excluded)

Pressure measurement error The % voltage error with a range of input from 0.5 to 4.5 is ± 2% (excluding probe).

The error in the converted value may vary according to the settings of parameters /9, /10, /11, /12

Connector specifications

The connectors may be purchased using CAREL code (MCHCON0***) or from the Molex® manufacturer

Connector Molex® code Number of ways 39-01-2120 12 39-01-2140 14

Max. number of insertion/removal cycles for the connectors: 25 cycles Code of the contacts according to the cross-section of the connection cables to the 12- and 14-pin connectors (use the special Molex® tool code 69008-0724 for crimping)

Power supply 24 Vac, range +10/–15 %; 50/60 Hz

Maximum input power: 3 W

Fuse mandatory in series with μC2SE power supply: 315 mAT 12-way connector Max. current 2 A for every relay output, extendible to 3 A for individual output Relay

Max. current at 250 Vac: EN60730: Resistive: 3 A, Inductive: 2 A cos =0.4 ; 60000 cycles

UL: Resistive: 3 A, 1 FLA, 6 LRA cos =0.4 30000 cycles

For further information consult the specifications stated in figure

Minimum interval between the communications (every relay): 12 s (it is the task of the machine manufacturer

in which the device is incorporated to guarantee the correct configuration in order to respond to this

specification)

Type of micro switch interruption action of the relays: 1 C

Isolation between group A relays: operational

Isolation between group A relays and the very low voltage: reinforced

Isolation between group A relays and the signalling relay: main

Isolation between the signalling relay and the very low voltage: reinforced

Isolation between the relays and the front panel: reinforced Digital Inputs Electric standard: free contact

Closing current referring to mass: 5 mA

Maximum closing resistance: 50 W Analogue inputs CAREL NTC temperature probes (10 kW at 25 °C)

Response time depends on the component used, typical value 90 s.

B4: NTC temp. probes (10 kW at 25 °C) or ratiom. pressure probes CAREL 0...5 V SPK*00**R* Fan output Control signal for CAREL modules MCHRTF****, CONVONOFF* and CONV0/10A*

Impulse position modulation (settable width) or modulation of the duty cycle

Unloaded voltage: 5 V ± 10%

Short circuit current: 30 mA

Minimum output load: 1 k Front protection rating IP55 Storage conditions -10T70 °C – humidity 80% R.H. non condensing Operating conditions -10T55 °C – humidity 90% R.H. non condensing Level of pollution Normal Heat and fire resistance cat. D (UL94 V0) PTI of the isolating materials

All isolating materials have PTI250 V Class and structure of the software A Period of electric stress across insulating parts Long Type-approvals CE/UL (File EI98839 sec.16)

Contacts current (A)

Number of c

cles

(

x 10

)

µC2SE process chiller +030220416 - rel. 2.3 - 17.05.2018

Contact Molex® code Cable section allowed 39-00-0077 AWG16 (1.308 mm2) 39-00-0038 AWG18-24 (0.823...0.205 mm2) 39-00-0046 AWG22-28 (0.324...0.081 mm2)

MCHSMLC*** pre-wired kits are also available

WARNINGS

 If one transformer is used to supply both the μC

 For use in residential environments, use shielded cable (two wires + shield earthed at both ends, AWG 20-22) for the tLAN connections

(EN 55014-1);

 Avoid short-circuits between V+ and GND so as not to damage the instrument. Perform all the maintenance and installation operations

when the unit is not connected to the power supply;

 Separate the power cables (relay outputs) from the cables corresponding to the probes, digital inputs and serial line;  Use a transformer dedicated exclusively to the electronic controllers for the power supply.

Protection against electric shock and maintenance warnings

The system made up of the control board (MCH200005*) and the other optional boards (MCH200006*, MCH200485*, MCHRTF****, CONVONOFF*, CONV0/10A*, EVD000040*) constitute a control device to be integrated into class I or class II appliances. The class of protection against electric shock depends on how the control device is integrated into the unit built by the manufacturer. Disconnect power supply before working on the board during assembly, maintenance and replacement. The protection against short circuits due to faulty wiring must be guaranteed by the manufacturer of the appliance that the controller will be fitted on.

Maximum length of the connection cables

NTC probes/ratiometric connection cables 10 m Digital input connection cables 10 m Power outputs connection cables 5 m Fan drive output connection cables 5 m Power supply cables

9.1 Software releases

Revision

1.5

Description The parameters that in release 2.0 were indicated as “do not select” are not more visible: c12, c13, F15, F16, H02, H03, H06, H21, P22, P33, r30, r47, r48, all “t” parameters Default values modified: H08: from 4 a 0; r43: from 7 a 0; A08: from 25 a 5; A11: from 25 a 7 The function of remote On/Off from digital input is now correct

Revision

1.5

The function of programming key is now correct Range parameter P18 modified (0…99.9)

CAREL INDUSTRIES HeadQuarters

Via dell’Industria, 11 - 35020 Brugine - Padova (Italy) Tel. (+39) 049.9716611 - Fax (+39) 049.9716600 e-mail: carel@carel.com - www.carel.com

µC2SE chiller processo +030220416 - rel. 2.3 - 17.05.2018

Carel MuC2SE User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual