CIAT DynaCIAT LG User manual

DYNACIAT LG/LGN (80-600)
CONNECT TOUCH
11 - 2020
10619
Instruction manual

CONTENTS
1 - SAFETY CONSIDERATIONS.................................................................................................................................................. 5
1.1 - Safety guidelines................................................................................................................................................................. 5
1.2 - Safety precautions............................................................................................................................................................... 5
2 - CONTROL OVERVIEW ........................................................................................................................................................... 6
2.1 - Control system .................................................................................................................................................................... 6
2.2 - System functionalities.......................................................................................................................................................... 6
2.3 - Operating modes................................................................................................................................................................. 6
3 - HARDWARE DESCRIPTION................................................................................................................................................... 7
3.1 - Control boards..................................................................................................................................................................... 7
3.2 - Power supply to boards....................................................................................................................................................... 7
3.3 - Light emitting diodes ........................................................................................................................................................... 7
3.4 - Connect Touch connections ................................................................................................................................................ 7
3.5 - Pressure transducers .......................................................................................................................................................... 8
3.6 - Temperature sensors........................................................................................................................................................... 8
3.7 - Actuators ............................................................................................................................................................................. 8
3.8 - Terminal block connections ................................................................................................................................................. 9
3.9 - RS485 wiring (best practice) ............................................................................................................................................. 10
4 - USER INTERFACE: OVERVIEW ...........................................................................................................................................11
4.1 - Touch screen display..........................................................................................................................................................11
4.2 - Home screen (synoptic view) .............................................................................................................................................11
4.3 - Information message box...................................................................................................................................................11
4.4 - Screen calibration...............................................................................................................................................................11
4.5 - Warning messages.............................................................................................................................................................11
4.6 - Saving modications ..........................................................................................................................................................11
4.7 - Header buttons.................................................................................................................................................................. 12
4.8 - Other buttons..................................................................................................................................................................... 12
5 - USER INTERFACE: MENU STRUCTURE........................................................................................................................... 13
5.1 - Main menu......................................................................................................................................................................... 13
5.2 - Conguration menu........................................................................................................................................................... 21
5.3 - Schedule menu ................................................................................................................................................................. 25
5.4 - Holiday menu .................................................................................................................................................................... 25
5.5 - Network menu ................................................................................................................................................................... 26
5.6 - System menu .................................................................................................................................................................... 28
5.7 - Login menu........................................................................................................................................................................ 30
5.8 - Start / stop menu............................................................................................................................................................... 31
5.9 - Alarms menu ..................................................................................................................................................................... 32
6 - STANDARD CONTROL OPERATIONS AND OPTIONS ...................................................................................................... 34
6.1 - Unit start/stop control ....................................................................................................................................................... 34
6.2 - Control interlock contact.................................................................................................................................................... 35
6.3 - Cooling/Heating................................................................................................................................................................. 35
6.4 - Additional heating control .................................................................................................................................................. 35
6.5 - Control point...................................................................................................................................................................... 35
6.6 - Heat exchanger water pump control ................................................................................................................................. 37
6.7 - Capacity control................................................................................................................................................................. 38
6.8 - Capacity limitation ............................................................................................................................................................. 38
6.9 - Condensing pressure control (optional) ............................................................................................................................ 39
6.10 - Dry Cooler Free Cooling (DCFC) .................................................................................................................................... 39
6.11 - Master/Slave assembly ................................................................................................................................................... 40
6.12 - Night mode...................................................................................................................................................................... 40
6.13 - Brine option (option 5, option 6) ...................................................................................................................................... 40
6.14 - BACnet (option 149)........................................................................................................................................................ 40
6.15 - Modbus (option 149B)..................................................................................................................................................... 40
6.16 - Software Activation Key(s) .............................................................................................................................................. 41
6.17 - Schedule setting.............................................................................................................................................................. 42
6.18 - Holidays........................................................................................................................................................................... 42
6.19 - Trending .......................................................................................................................................................................... 43
6.20 - User quick test................................................................................................................................................................. 43
7 - WEB CONNECTION.............................................................................................................................................................. 44
7.1 - Web interface .................................................................................................................................................................... 44
7.2 - Technical documentation................................................................................................................................................... 44
DYNACIAT LG/LGN EN-2

CONTENTS
8 - DIAGNOSTICS ...................................................................................................................................................................... 45
8.1 - Control diagnostics............................................................................................................................................................ 45
8.2 - Displaying current alarms.................................................................................................................................................. 45
8.3 - E-mail notications ............................................................................................................................................................ 45
8.4 - Resetting alarms ............................................................................................................................................................... 45
8.5 - Alarm history...................................................................................................................................................................... 45
8.6 - Alarms description............................................................................................................................................................. 46
9 - MAINTENANCE..................................................................................................................................................................... 49
EN-3 DYNACIAT LG/LGN
The illustrations in this document are for illustrative purposes only and not part of any o󰀨er for sale or contract. The manufacturer reserves the right to change the design
at any time without notice.

PREFACE
The goal of this document is to give a broad overview of the main
functions of the control system used to control and monitor the
operation of the following units:
■DYNACIAT LG series (cooling or heating): units with water-
cooled condenser
■DYNACIAT LGN series (cooling): units without condenser
Instructions in this manual are given as a guide to good practice
in the installation, start-up and operation of the control system.
This document does not contain full service procedures for the
correct operation of the equipment.
The support of a qualied Manufacturer Service Engineer is
strongly recommended to ensure optimal operation of the
equipment as well as the optimization of all available
functionalities.
Note that this document may refer to optional components and
certain functions, options or accessories may not be available
for the specic unit.
IMPORTANT: All screenshots of the user interface provided
in this manual include text in English. After changing the
language of the system, all labels will be in the language
selected by the user.
Please read all instructions prior to proceeding with any work.
Pay attention to all safety warnings.
The information provided herein is solely for the purpose of
allowing customers to operate and service the equipment and it
is not to be reproduced, modied or used for any other purpose
without the prior consent of the Manufacturer.
Acronyms/abbreviations
In this manual, the refrigerant circuits are called circuit A and
circuit B. Compressors in circuit A are labelled A1, A2 and A3.
Those in circuit B are B1 and B2.
■Dynaciat LG - LGN (080-450) units have only one circuit with
one, two, or three compressors (A1, A2, A3).
■Dynaciat LG - LGN (480-600) units have two circuits with two
compressors per circuit (A1, A2, B1, B2).
The following abbreviations are used frequently:
BMS Building Management System
BPHE Brazed Plate Heat Exchanger
DCFC Dry Cooler Free Cooling
DGT Discharge Gas Temperature
EHS Electric Heater Stage
EWT Entering Water Temperature
EXV Electronic Expansion Valve
HSM Hydronic System Manager
LED Light Emitting Diode
LEN Sensor Bus (internal communication bus linking the
basic board to slave boards)
LWT Leaving Water Temperature
OAT Outdoor Air Temperature
SCT Saturated Condensing Temperature
SST Saturated Suction Temperature
Operating modes:
Local-O󰀨/LOFF Operating type: Local O󰀨
Local-Schedule/L-SC Operating type: Local On following
a time schedule
Local-On/L-C Operating type: Local On mode
Master mode/Mast Operating type: Master unit (master/
slave assembly)
Network mode/Net Operating type: Network
Remote mode/Rem Operating type: Remote contacts
DYNACIAT LG/LGN EN-4

1 - SAFETY CONSIDERATIONS
1.1 - Safety guidelines
Installation, start-up and servicing of equipment can be
hazardous if certain factors particular to the installation are not
considered: operating pressures, presence of electrical
components and voltages and the installation site (elevated
plinths and built-up structures).
Only properly qualied installation engineers and highly qualied
installers and technicians, fully trained for the product, are
authorised to install and start up the equipment safely.
During all servicing operations all instructions and
recommendations which appear in the installation and service
instructions for the product, as well as on tags and labels xed
to the equipment and components and accompanying parts
supplied separately, must be read, understood and followed.
Failure to comply with the instructions provided by the
manufacturer may result in injury or product damage.
■Apply all standard safety codes and practices.
■Wear safety glasses and gloves.
■Use the proper tools to move heavy objects.
■Move units carefully and set them down gently.
1.2 - Safety precautions
Only personnel qualied in accordance with IEC (International
Electrotechnical Commission) recommendations may be
permitted access to electrical components.
It is particularly recommended that all sources of electricity to
the unit be shut o󰀨 before any work is begun. Shut o󰀨 the main
power supply at the main circuit breaker or isolator.
IMPORTANT: This equipment conforms to all applicable
codes regarding electromagnetic compatibility.
RISK OF ELECTROCUTION! Even when the main circuit
breaker or isolator is switched o, specic circuits may still
be energised as they may be connected to a separate power
source.
RISK OF BURNS! Electrical currents may cause components
to get hot. Handle the power cable, electrical cables and
conduits, terminal box covers and motor frames with great
care.
EN-5 DYNACIAT LG/LGN

2 - CONTROL OVERVIEW
Connect Touch control system:
■Allows users to control the unit via the Connect Touch user
interface.
■Provides web connectivity technology.
■Supports Enhanced Control Management (Connected
Services, Cristo Control, Power Control) for multiple chillers/
heat pump conguration.
■Provides direct BMS integration capabilities via Modbus
RTU/TCP and BACnet IP.
2.3 - Operating modes
The control can operate in three independent modes:
■Local mode: The unit is controlled by commands from the
user interface.
■Remote mode: The unit is controlled by dry contacts.
■Network mode: The unit is controlled by network commands
(Proprietary Protocol / BACnet / Modbus).
When the control operates autonomously (Local or Remote),
it retains all of its control capabilities but does not o󰀨er any of
the features of the Network.
Emergency stop! The Network emergency stop command
stops the unit regardless of its active operating type.
2.1 - Control system
Dynaciat units come with a Connect Touch control that serves
as the user interface and configuration tool for the communicating
devices.
Connect Touch controls:
■compressor start-up to control the water loop
■fixed or variable-speed pumps to optimise water loop
operation
■ fan stages for units tted with a dry cooler or LGN units with
a remote condenser
Connect Touch control can function as a stand-alone system or
it may be connected to the building management system using
a communication bus.
IMPORTANT: This document may refer to optional
components and certain functions, options or accessories
may not be available for the specic unit.
2.2 - System functionalities
The system controls the start-up of the compressors needed to
maintain the desired heat exchanger entering and leaving water
temperature. It constantly manages the operation of the fans in
order to maintain the correct refrigerant pressure in each circuit
and monitors safety devices that protect the unit against failure
and guarantee its optimal functioning.
Features overview
Feature Dynaciat LG Dynaciat LGN
standard optional standard optional
4.3’’ touch screen ( Connect Touch )x x
Web connectivity x x
E-mail transmission x x
Language packs (+ language pack customization) x x
Metric / Imperial unit display x x
Modbus RTU / Modbus TCP communication (option 149B) x x
BACnet IP communication (option 149) x x
Scroll compressor technology x x
Fluid type: Medium Brine (option 5) x
Fluid type: Low Brine (option 6) x
Diagnostics x x
User quick test x x
Variable speed pump x
Cooling control x x
Heating control x
Boiler heating control x
Electric heating control x
Dry Cooler Free Cooling control (DCFC) x x
Condenser dry cooler - only LEN connector provided
(dry cooler installed separately) x x
DYNACIAT LG/LGN EN-6

3 - HARDWARE DESCRIPTION
3.1 - Control boards
The control system consists of the main controller, i.e. Connect
Touch, and at least one SIOB board. The controller constantly
monitors the unit and manages the information received from
various pressure and temperature probes.
The electrical box includes all boards controlling the unit and the
user interface. All boards communicate via an internal bus.
The number of SIOB boards depends on the following:
■Size of the unit: Single-circuit units have one SIOB board by
default, whereas dual-circuit units are tted with two SIOB
boards (the second SIOB board is normally used to support
the second refrigerant circuit).
■ Additional options: 080 to 450 size units may be tted with
the second SIOB board only if the unit comes with additional
functionalities, e.g. pump on the source side (condenser for
cooling mode and cooler for heating mode).
In addition to SIOB board(s), Dynaciat LG/LGN units of all sizes
can be equipped with AUX1 board(s).
The number of AUX1 boards installed on the unit depends on
the selected options (see below).
AUX1 board
Option LG LGN
Master/Slave assembly o o
Dry Cooler Free Cooling* o o
Dry cooler (condenser)* o o
*For these two options the board is directly installed in the dry cooler itself, not in
the control box of the air-conditioning unit.
3.2 - Power supply to boards
All boards are supplied from a common 24 VAC supply referred
to earth. In the event of a power supply interrupt, the unit restarts
automatically without the need for an external command.
However, any faults active when the supply is interrupted are
saved and may in certain cases prevent a given circuit or the
unit from restarting.
CAUTION: Maintain correct polarity when connecting the
power supply to the boards, otherwise the boards may be
damaged.
3.3 - Light emitting diodes
All boards continuously check and indicate the proper operation
of their electronic circuits. A light emitting diode (LED) lights on
each board when it is operating properly.
■The red LED ashing for a two-second period indicates correct
operation. A di󰀨erent rate indicates a board or a software
failure.
■ The green LED ashes continuously on all boards to show
that the board is communicating correctly over its internal bus
(LEN bus). If the green LED is not ashing, this indicates
a LEN bus wiring problem or a conguration issue.
3.4 - Connect Touch connections
Connections are located on the bottom of the main controller.
■The control o󰀨ers communication protocols such as LEN,
Proprietary Protocol, Modbus RTU or Modbus TCP and/or
BACnet IP.
■It is possible to enable and disable end of line resistors via
the System menu (see section 5.6).
■One Ethernet port allows for TCP/IP communication or BMS
(Building Management System) connection.
Connect Touch connections
EN-7 DYNACIAT LG/LGN

3.5 - Pressure transducers
The control implements three types of pressure transducers,
where two pressure transducers (high pressure and low pressure)
are used to measure the suction and discharge pressure in each
circuit and the third transducer type is water pressure type used
in case of units tted with the hydronic kit option.
■Discharge pressure transducers (high pressure type)
These transducers measure the discharge pressure in each
circuit. They are used to control head pressure or high
pressure load shedding. Discharge pressure sensors are
mounted on the discharge line piping of each circuit.
■Suction pressure sensors (low pressure type)
These transducers measure the suction pressure in each
circuit. They are used to control EXV, evaporating pressure
(in heating mode) and monitor suction pressure safeties
related to the compressor operating envelope. Suction
pressure sensors are located on the suction piping of each
circuit.
■Water pressure transducers
As an option (hydronic kit option), these sensors are used to
monitor the water pressure and the water ow by measuring
the water pressure in two di󰀨erent locations. The water ow
rate is calculated, the unit is protected against water ow
losses and the pump is protected against cavitation (low
pump entering pressure).
3.6 - Temperature sensors
Temperature sensors constantly measure the temperature of
various components of the unit, ensuring the correct operation of
the system.
■Water heat exchanger entering and leaving water temp.
sensors
The water heat exchanger entering and leaving water temp.
sensors are used for capacity control and safety purposes.
The water temperature sensors are installed in the entering
and leaving side.
■Suction temperature sensors
Suction temperature sensors are used to control temperature
at the compressor inlet line in order to ensure correct capacity
control management.
■Condenser entering and leaving water temp. sensors
(Dynaciat LG)
The condenser entering and leaving water temperature
sensors are used for heating capacity control and safety
purposes.
■Outdoor air temperature sensor (optional)
If available (Dynaciat LGN as standard), this sensor
measuring the outdoor air temperature is used for the reset
signal calculation and for condensing fan control (standard
for dry cooler and condenserless unit control).
■Master/Slave water sensors (optional)
These sensors measure the common water temperature in
the master/slave system capacity control. They are installed
only in the case of master/slave units.
3.7 - Actuators
■Electronic expansion valve
The electronic expansion valve (EXV) is used to adjust the
refrigerant ow to changes in the operating conditions of the
machine. The high degree of accuracy with which the piston
is positioned provides precise control of the refrigerant ow
and suction superheat.
■Water ow switch
For units without internal pumps, the water ow switch
conguration allows for the automatic control of the minimum
water ow setpoint of the water ow switch. The conguration
depends on the unit size and is made automatically at the
start-up. If the ow switch fails, the alarm condition shuts o󰀨
the unit.
■Water pumps (optional)
The controller can independently regulate each water heat
exchanger pump. The controller enables constant ow control
based on the minimum pump speed setpoint.
Water ow control can also be based on the heat exchanger
temperature di󰀨erence or the water pressure di󰀨erence.
■Boiler
If there is a unit fault in the heating mode this output
authorises start-up and shutdown of a boiler. Dynaciat LG
units can be tted with a boiler which is energised only when
requested by the controller in case of heating demand. For
Dynaciat LG units, the boiler is activated when the operating
conditions are not suitable for thermodynamic heating or the
unit is down due to a detected failure.
■Electric heaters
Electric heaters are used as a supplementary heating source
in the heating mode.
3 - HARDWARE DESCRIPTION
DYNACIAT LG/LGN EN-8

3.8 - Terminal block connections
Connections available at the user terminal block may vary
depending on the selected options. The following table
summarizes the connections at the user terminal block.
IMPORTANT: Some contacts can be accessed only when
the unit operates in Remote mode.
Description Board Connector Remarks
Remote On/O󰀨 contact SIOB, cir A +:32/ -:33 Used for the unit on/o󰀨 control (Remote mode)
Remote Heat/Cool contact SIOB, cir A +:63/ -:64 Used to set cooling and heating when the unit is in Remote mode
Switch-controlled demand limit SIOB, cir A +:73/ -:74 Used to control demand limit
Switch dual setpoint SIOB, cir A +:65/ -:66 Used to select the second cooling setpoint
Lock switch SIOB, cir A +:34/ -:35 Used for the customer safety loops
Condenser 3-way valve SIOB, cir A +:80+/-:80- Used to control the water ow on the condenser side
Boiler SIOB, cir A +:69/ -:70 Used to command a boiler
Running SIOB, cir A +:37/-: 38 Used to signal a running status (at least one compressor start)
Alarm SIOB, cir A +: 30/-: 31 Used to signal an alarm
Electrical Heater Stage 1 AUX1 341 / 12 Used to control the electrical heater stage 1
Electrical Heater Stage 2 AUX1 342 / 12 Used to control the electrical heater stage 2
Electrical Heater Stage 3 AUX1 343 / 12 Used to control the electrical heater stage 3
Electrical Heater Stage 4 AUX1 344 / 12 Used to control the electrical heater stage 4
NOTE: Please refer to the electrical scheme for more
information about electrical terminal identication.
3.8.1 - Volt-free contact (on/o󰀨 and cooling/heating)
For chillers with a boiler or heat pumps, on/o󰀨 contacts and
cooling/heating contacts are as follows:
Contact Off Cooling Heating
On/O󰀨 contact
[ON_OFF_SW] open closed closed
Cooling/heating contact
[HC_SW] open open closed
O󰀨: Unit is stopped
Cooling: Unit is allowed to start in Cooling
Heating: Unit is allowed to start in Heating (chiller with boiler control or heat pump)
3.8.2 - Volt-free setpoint selection contact
When the unit is under remote control, the volt-free contact is
used to determine the active setpoint. This dry contact is used
to switch between setpoints. It is active only when the control is
in Remote mode.
Contact Active setpoint
SP1 SP2 SP3 Auto
SETP_SW1 open closed open closed
SETP_SW2 open open closed closed
3.8.3 - Volt-free demand limit selection contact
One dry contact can be used to limit unit capacity. The limit
threshold can be dened via the user interface in the Setpoint
menu.
Contact 100% Limit 1 Limit 2 Limit 3
Demand limit 1 contact
[LIM_SW1] open closed open closed
3 - HARDWARE DESCRIPTION
EN-9 DYNACIAT LG/LGN

3.9 - RS485 wiring (best practice)
For RS485 ports, one of the following cables can be used:
■two twisted pairs + a shield (RECOMMENDED)
■three wires + a shield
Note that “+” and “-” are communication signals and they are
from the same twisted pair.
The signal ground could be a single wire or a twisted pair and it
should be connected to the “C” pin of J10 (Modbus RTU) or J7
(Proprietary Protocol). This wire is required so that all nodes on the
bus share a common ground reference connection.
If a shield is used, then the shield cable should be properly
terminated and connected as short as possible at ONLY one
end to the chassis ground (4.3-inch controllers).
3.9.1 - RS485 wiring: 4.3-inch controller
The following diagrams illustrate possible RS485 wiring schemes
for 4.3-inch controllers.
The rst wiring scheme is the best option (RECOMMENDED),
but the second or the third wiring can also be used.
No.1 RS485 wiring diagram (RECOMMENDED)
No. 2 RS485 wiring diagram (CORRECT)
No. 3 RS485 wiring diagram (CORRECT)
No. 4 RS485 wiring diagram (INCORRECT - Do not use!)
No. 5 RS485 wiring diagram (INCORRECT - Do not use!)
3.9.2 - RS485: Daisy chain conguration
The following illustration shows proper 3-wire cable with a shield
in a daisy chain conguration.
BC
D
Legend
B Shield
C Keep shield continued
D Connect shield to earth ground only at one point
End of Line Resistor: Termination is only needed when running
at bus at very high speed over long distances.
The speed of the bus and the cable distance determine whether
termination is needed. It is meant to balance the bus to minimize
the ringing that may be caused by fast signals and the inductance
of the cabling.
At 9600 baud, termination will have little or no e󰀨ect on the bus.
3 - HARDWARE DESCRIPTION
DYNACIAT LG/LGN EN-10