CIAT Connect 2 Installation, Operation, Commissioning, Maintenance
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CIAT Connect 2 Installation, Operation, Commissioning, Maintenance

CIAT Connect 2 Installation, Operation, Commissioning, Maintenance

Microchip and lcd display electronic regulation and signaling electronic module for liquid coolers and heat pumps
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See also: Installation, Operation, Commissioning, Maintenance
NA 09.13 H
09 - 2011
Microchip and LCD display
electronic regulation and
signaling electronic module
for liquid coolers
and heat pumps
Installation
Operation
Commissioning
1
Maintenance

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  • Page 1 NA 09.13 H 09 - 2011 Microchip and LCD display electronic regulation and signaling electronic module for liquid coolers and heat pumps Installation Operation Commissioning Maintenance...

  • Page 3: Table Of Contents

    CONTENTS PAGE 1 IMPORTANT RECOMMENDATIONS 2 GENERAL 3 Composition 3.1 Main control board for machines with one refrigerating circuit 3.2 Additional board 1 3.3 Additional board 2 3.4 Control and display console 3.5 Connection via RS485 serial port for BMS or control console and Multiconnect with 500 kW module 3.6 Relay boards 4 DESCRIPTION 4.1 Main board...

  • Page 4: Additional Board

    22.1 Case of two parallel-connected machines 23 ACTUATION OF THE ELECTRONIC EXPANSION VALVE 23.1 With Alco driver and display 23.2 With CIAT driver 24 IMPORTANT INFORMATION REGARDING THE CONTROL OF AN INVERTER COMPRESSOR 25 DEFROSTING OF THE EVAPORATOR COILS 26 HOURLY PROGRAMMING 26.1 Presentation...

  • Page 5: Important Recommendations

    1 IMPORTANT RECOMMENDATIONS Your unit is equipped with a microprocessor-controlled electronic circuit board. To ensure the correct operation of your machine, you must follow the rules listed below.   Electrical power supply Connection of communication buses and of Remote control: 230 V AC/50 Hz. the remote console machine‟s remote...

  • Page 6: Composition

    3 COMPOSITION The C 2 control module consists of: ONNECT ► One control and display panel fitted on the unit. ► One non-reversible circuit = one main board. ► One reversible circuit = one main board + one additional board (No. 1) → rotary switch in position 1. ►...

  • Page 7: Additional Board 1

    TERMINAL BLOCK J8 (analogue inputs) TERMINAL BLOCK J11 1-2 Refrigerant temperature sensor, circuit 1 BMS link 2-3 10 K suction temperature sensor, circuit 1 TERMINAL BLOCK J12 4-5 10 K liquid temperature sensor, circuit 1 Local console link 6-7 50 K discharge temperature sensor, stage 1, circuit 1 TERMINAL BLOCK J13 7-8 50 K discharge temperature sensor, stage 2, circuit 1 Link for additional boards...

  • Page 8: Additional Board 2

    3.3 Additional board 2 3.3.1 Rotary switch set to position 1 - Two circuit use TERMINAL BLOCK J1 Flash Memory connector TERMINAL BLOCK J2 (on/off inputs) 1-2 Motor fault, stage 1, circuit 2 2-3 Motor fault, stage 2, circuit 2 4-5 Manual reset fault, HP, circuit 2 5-6 Expansion valve fault, circuit 2 7-8 Load shedding input, stage 1, circuit 2...

  • Page 9: Control And Display Console

    3.4 Control and display console Confirm button Setpoint 1/ Setpoint 2 button Cancel button Heating/ Cooling selection On/Off button button General fault LED Circuit fault Reset Power LED The local console and the remote control console have the same front. Mounting dimensions (in mm) of remote control console Thickness: 55 mm...

  • Page 10: Connection Via Rs485 Serial Port For Bms Or Control Console And Multiconnect With 500 Kw Module

    3.5 Connection via RS485 serial port for BMS or control console and Multiconnect with 500 kW module 2 main board ONNECT ULTI ONNECT main board Unit 2 Shield additional board Shield See detail B Local console Remote control console RS-485 link to BMS Installed on unit (Modbus protocol) Optional...

  • Page 11: Relay Boards

    3.6 Relay boards The dry contacts on the relay boards make it possible to remotely view the states of the stages that are on and all the fault states on the unit.  A 230 V +6% -10% power supply must be provided for each relay board. Connect terminal block J1 (1-2) on each relay board to terminal block J10 on the main board.

  • Page 12: Man-Machine Communication

    L E V E L - Level 3 provides automatic access to all levels (CIAT technicians). - Level 2 provides access to levels 1 and 2 only (Technicians/Maintenance and CIAT technicians). - Level 1 provides access to level 1 only (all users).
  • Page 13 - No password is needed to access level 1. The setpoint adjustment range is + or – 5 K lower than in the higher access levels. - The restriction messages remain displayed in access level 1. Operating messages in optimised mode are visible only in access levels 2 and 3. - Restriction of access to level 1 only is stored in memory in the event of a mains power failure.

  • Page 14: Configuring Access Levels On The Controller

    2 and who connects to ONNECT the board. - Access to levels 2 and 3 is restricted to CIAT Service technicians. Please contact your local CIAT Service office. 5.5 Classification of the menus and their functions Level 1: Level 2: ...
  • Page 15 Electric auxiliary heaters No - Yes If P2 = 1 or 3 Number of pumps delivered by CIAT 0-1-2 if P2 = 2 and 0-1 if P2 = 3 Visible if P2 = 2 or 3 2WV, Visible if P2 = water/water and P3 = 1...
  • Page 16 Description Setting Default Display conditions Breakdown (continued) If P2 = 3: 0.5 b If P2 ≠ 3: (1.5 b if P1 = R22, R407C, LP fault threshold 0.1 to 5 b (resolution: 0.1) R404a) and (0.5 b if P1 = R134a) 2.5 b with R410A LP slope factor...
  • Page 17 Description Setting Default Display conditions Setpoint Management ( CONTINUED Cooling setpoint adjustment = f (out. temp.) No - Yes If P2 = 1, 2 or 3 and P119 ≠ Heating Drift start -20 to 55°C (resolution: 1) If P127 = Yes Drift end P128 + 5 K at 60°C (resolution: 1) If P127 = Yes...
  • Page 18 Description Setting Default Display conditions AN MANAGEMENT 1 if P3 = 1 2 if P3 = 2 and 1 to 2 if P3 = 1 P11 = intertwined 2 to 4 if P3 = 2 and P11 = intertwined Visible if P2 = 2 or 3 + Number of HP control stages per circuit 2 if P3 = 2 and 2 or 3 if P3 = 2 and P11 = split...
  • Page 19 Description Setting Default Display conditions Read-only ( CONTINUED Control setpoint If P141 ≠ 5 and ≠ 6 Outdoor air temperature Water inlet temperature, heat exchanger 1 Water outlet temperature, heat exchanger 1 Hot water inlet temp., condenser If P2 = 1 and P141 = 1 Hot water outlet temp., condenser If P2 = 1 and P141 = 3 Refrigerant temperature, circuit 1 coils...
  • Page 20 Default Display conditions Circuit 1 ( CONTINUED Opening of circuit 1 expansion valve If P42 = CIAT and P3 = 1 Circuit 1 liquid temperature °C If P2 = 1 or 2 or (3 + cooling mode) Circuit 1 subcooling °C...
  • Page 21 If P22 = Yes Version number of circuit 1 expansion valve XX.YY VCM XX.YY If P42 = CIAT and P3 = 1 Version number of circuit 2 expansion valve XX.YY VCM XX.YY If P42 = CIAT and P3 = 2 "SO"...

  • Page 22: Management Of Aero-Connect Parameters

    ALVE Circuit 1 Circuit 1 valve type EX4 - EX5 - EX6 - EX7 - EX8 If P42 = CIAT and P3 = 2 Circuit 1 superheat setpoint 0.5 to 30°C If P42 = CIAT and P3 = 1 Circuit 1 MOP point...

  • Page 23: Contents Of The Menus

    ONNECT 2 console because setting A116 to „No‟ will delete the link with the console. - Parameter A116 (CIAT CW unit link) is not accessible via the C ONNECT - Parameter A250 is not accessible because the LED test on the C...

  • Page 24: Machine Status Menu

    8.3 MACHINE STATUS menu To enter the MACHINE STATUS menu, use the + or - buttons to position the cursor on 2 then press OK. 8.3.1 Main table This screen reappears automatically after one hour if No general faults occur, no controls are activated (via the console, modem, etc.), no general faults are reported and no automatic controls are closed: C O N N E C T 2 h h / m n...
  • Page 25 8.3.2 MACHINE STATUS table This table appears only if any of the following messages must be displayed using the ↑and ↓buttons. The messages are displayed in the following order of priority: M A C H I N E S T A T U S F A N F A U L T P U M P...
  • Page 26 2 4 H B O A R D L I N K F A U L T If P 42 = CIAT C I R C U I T E X V A C T U A T O R F A U L T If P42 ≠...
  • Page 27 S U C T I O N T E M P . S E N S O R F A U L T C I R C J x / x x - x x E X C H . x R E F R .

  • Page 28: Measured Values Menu

    8.4 Measured values menu To access the MEASURED VALUES menu, use the+ or – buttons Use the + and - buttons to scroll through the tables at a rate of to position the cursor on 3, then press OK (the list of submenus three rows at a time.
  • Page 29 Once the user sets the "locking" parameter to "NO", the text is marked Pxx and the button symbol disappears. The following parameters can then be accessed: Refrigerant type: P 0 1 R 4 0 7 c R E F R I G E R A N T P 0 1 R 1 3 4 a R E F R I G E R A N T...
  • Page 30 Heat exchanger suppliers: P 0 8 E X C H A N G E R C I A T P 0 8 E X C H A N G E R S W E P P 0 8 E X C H A N G E R S W E P D O U B L E P 0 8...
  • Page 31 P 2 0 A L L - S E A S O N O P E R A T I O N Y E S Variable speed control board: P 2 1 V A R I A B L E S P E E D W I T H O U T P 2 1...
  • Page 32 Frost protection for recovery option: P 2 9 . 1 H E A T R E C O V . E X C H . F R O S T P R O T E C T I O N P 2 9 .

  • Page 33: Adjustment Parameters Menu

    8.6 ADJUSTMENT PARAMETERS menu To access the ADJUSTMENT PARAMETERS menu, use the + or – buttons to position the cursor on 5 then press OK. The display shows the list of control parameters. Example: P x x S T A G E D I F F E R E N T I A L x x .
  • Page 34 P 1 1 1 P R O G R A M M A B L E O N / O F F O U T P U T B O I L E R P 1 1 1 P R O G R A M M A B L E O N / O F F O U T P U T C O O L I N G / H E A T I N G...
  • Page 35 Cooling setpoint 1: P 1 2 1 C O O L I N G S E T P O I N T - x x . x ° Cooling setpoint 2: P 1 2 1 C O O L I N G S E T P O I N T - x x .
  • Page 36 Control mode: P 1 4 1 R E G U L A T I O N T Y P E I N L E T P 1 4 1 R E G U L A T I O N T Y P E O U T L E T Water supply control with compensation...
  • Page 37 P 1 5 5 S T O R A G E C T R L D I F F E R E N T I A L x . x Defrosting: Temperature at start of defrosting: P 1 5 7 T E M P E R A T U R E S T A R T D E F R O S T I N G...
  • Page 38 Fan control: Number of fan stages: P 1 8 0 N O . C T R L S T A G E S / C I R C U I T HP control setpoint: P 1 8 1 C O N T R O L S E T P O I N T x x .
  • Page 39 Differential used to shut off these heating elements: P 2 2 2 O U T . T E M P . D I F F . W I N T E R P R O T E C . - x x . x ° Minimum air temperature for operation in heating mode: P 2 2 5 M I N .
  • Page 40 P 6 0 4 C I R C U I T M O P V A L U E 1 5 ° C P 6 0 5 O P N G E X V S T A R T A I R C O N X X X % P 6 0 6...

  • Page 41: Operation Parameters Menu

    Number of stop bits: P 7 0 3 N U M B E R S T O P B I T S Format of real numbers: P 7 0 4 S W A P P E D R E A L N U M B E R F O R M A T Y E S Bus number:...
  • Page 42 LED test: used to turn on the console LEDs corresponding to the machine configuration: P 2 5 0 L E D T E S T Control setpoint: P 2 5 1 C O N T R O L S E T P O I N T x x .
  • Page 43 Refrigerant temperature on circuit 2 heat exchanger: P 2 6 4 E X C H . R E F R . T E M P . - x x . x ° Ambient temperature of heat exchanger: P 2 6 5 E X C H A N G E R A M B I E N T T E M P .
  • Page 44 Circuit 1 information: Circuit 1 High Pressure value: P 3 0 0 H P 1 P R E S S U R E x x . x b Value of calculated High Pressure control setpoint: P 3 0 0 . 1 H P 1 C O N T R O L S E T P O I N T...
  • Page 45 Number of times stage 1 on circuit 1 turned on: P 3 1 0 N O . S T A R T S S T A G E 1 C I R C U I T x x x x x Runtime of stage 1 on circuit 1: P 3 1 1 S T A G E 1...
  • Page 46 Number of cut-offs caused by circuit 1 expansion valve fault: P 3 2 8 N O . C U T O F F S C A U S E D E X V 2 4 H Circuit 2 information: Circuit 2 High Pressure value: P 3 3 0 H P 2 P R E S S U R E...
  • Page 47 Number of cut-offs caused by a High Pressure fault on circuit 2 in 24 hours: P 3 3 8 N O . H P 2 C U T S H O U R S Number of cut-offs caused by a Low Pressure fault on circuit 2 in 24 hours: P 3 3 9 N O .
  • Page 48 Circuit 2 liquid temperature: P 3 5 6 C I R C U I T L I Q U I D T E M P . x x . x ° Circuit 2 subcooling value: P 3 5 7 C I R C U I T S U B C O O L I N G x x .
  • Page 49 State of stage 1 override input: P 4 1 4 S T A G E O V E R R I D E I N P U T O P E N State of stage 2 override input: P 4 1 5 S T A G E O V E R R I D E I N P U T...
  • Page 50 Pump 2 contact: P 4 3 1 P U M P O U T P U T Circuit 1 Y/C contact: P 4 3 2 C I R C U I T Y / C O U T P U T Circuit 2 Y/C contact: P 4 3 3 C I R C U I T...
  • Page 51 Control contact for fan stages P180 = 3 (3 stages) and P3 = 2 (2 circuits) and P11 = split P441, P442, P443 and P444 same as P180 = 2 (2 stages) and P3 = 2 (2 circuits): P 4 4 5 C O N T R O L S T A G E O U T P U T...

  • Page 52: Fault Memory Menu

    P 5 5 9 A U X . B O A R D V E R S I O N N O . x x - x x Version number of circuit 1 electronic expansion valve: P 5 6 0 C I R 1 E X V V E R S I O N...

  • Page 53: Test Mode Menu

    x - C O N D E N S E R S E N S O R x - C O N D E N S E R O U T S E N S O R x - C I R C O I L S E N S O R x - D I S C H .

  • Page 54: Management Of The On/Off Inputs

    9 MANAGEMENT OF THE ON/OFF INPUTS 9.1 Automatic machine operation control This control allows customers to remotely prevent the machine from operating. - The On/Off LED flashes when this control is on. - Message on display: SHUT OFF BY MACHINE AUTO CONTROL Contact state: closed or connected by a jumper (automatic machine operation control = Yes) 9.2 Load shedding control The load shedding controls on the main board are used to turn off...

  • Page 55: Fan Fault (Circuits 1 And 2)

    If ≥ 3 stops in 1 hour  If a fault occurs: - Pump 2 is shut off - General fault LED on console flashes - Thermodynamic stages shut off; auxiliary heaters may remain on - The time delay value obtained is stored in memory so that it - Saved in fault memory can be applied the next time the pump is turned on.

  • Page 56: Phase Controller Fault

    If P25 = 0: No pumps supplied by CIAT. Only pump 1 fault is managed in the same way if P25 = 1. If a pump fault occurs after the last control stage is shut off but before the pump is shut off (1 minute after), the water flow fault is not...

  • Page 57: Compressor Protection

    If P25 = 1: Only one pump supplied. If the pump fault is detected, the unit is shut off and the following message appears: M A C H I N E O F F P U M P F A U L T - Compressor and electric stages shut off - Pump 1 fault relay on optional board in On position - Saved in fault memory...

  • Page 58: Setpoint Selection Via On/Off Input

    9.10 Setpoint selection via on/off input If the number of setpoints = 2 with selection via on/off input (the on/off input corresponds to terminals 4-6 on terminal block J6 on the motherboard). In cooling mode: - If the setpoint is not adjusted based on the outdoor temperature - If the setpoint is adjusted based on the outdoor temperature and or there is a fault on the outdoor temperature sensor, the control there are no faults on the outdoor sensor:...

  • Page 59: Operating Mode Selection

    9.12 Operating mode selection If P119 = 4 (cooling/heating via on/off input): The unit is controlled, during water heating or water chilling, based on the mode selected via the input located: - Between terminals 5-6 on terminal block J6 on the motherboard mode, and it must be open in order to be able to select cooling if P2 = water-to-water mode.
  • Page 60 Water outlet sensor on heat exchanger 2: CTN 10 K at 25°C (if P2 = 1, 2 or 3)(if P6 = 2 → two sensors + manifold sensors). This sensor monitors the water temperature on the exchanger outlet in order to: - Enable the frost protection 99.9°C, resolution: 0.1 K).
  • Page 61 LCD, unit fault LED flashes, fault saved in fault Circuit suction sensor: CTN 10 K at 25°C (all configurations) If P42 = 2 (electronic expansion valve on CIAT board) The sensor is connected to the expansion valve board and the temperature information is transmitted over the bus link.

  • Page 62: Pressure Sensor

    Correspondence table: SENSOR RESISTANCE Ω Temperature DISCHARGE SENSOR CONTROL AND OUTDOOR (°C) 50 KΩ SENSOR 10 KΩ 55340 42340 162250 32660 126977 25400 99517 19900 78570 15710 62468 12490 50000 10000 40280 8058 32650 6532 26624 5326 21834 4368 18005 3602 10.2 Pressure sensor The high and low values for the HP/LP pressure sensors are given below:...

  • Page 63: Pump

    11 MANAGEMENT OF THE WATER PUMPS 11.1 Pump 1 Pump 1 is assigned to the main hydraulic network. Therefore, it is used in all configurations: - If P2 = air-to-water or reversible air-to-water and P25 = 2, it will - Otherwise, the pumps may be turned on using the On/Off button be managed alternately with Pump 2.

  • Page 64: Water Loop Winter Protection

    12.1.2 Use with glycol/water mix: If P52 < its standard adjustment value based on the refrigerant type: 1) Heater control: 2) Heat trace cable control: - If exchanger ambient temperature and water inlet temperature ≤ - If outdoor temperature ≤ 0 and water inlet temperature ≤ 0°C + P52 + 2 K + all compressors off + pump off if P25 ≠...

  • Page 65: Management Of The Time Counters

    13.1.2 Forced stop of compressors This function prevents the compressor stages from operating individually. It is enabled and disabled via the following parameters: P230: On authorisation, stage 1 circuit 1 P232: On authorisation, stage 1 circuit 2 P231: On authorisation, stage 2 circuit 1 P233: On authorisation, stage 2 circuit 2 13.2 Management of the time counters The number of hours of operation in each mode (cooling and heating) can be viewed for each pump and each compressor stage.

  • Page 66: Management Of The Reversing Valves

     Short-cycle protection management (SCP): - Call for power: If the only available stage is in SCP mode, the machine remains in its current state and SCP is indicated by the flashing LED on the console. Before a stage is turned on, the runtime of each stage is always checked so that the stage that has run the least is started first. 13.4 Management of the reversing valves The reversing valves are fitted on reversible units only.

  • Page 67: Self-Adjusting Function: Hp Pressure Limit

    Exception: P08 = "SWEP DOUBLE": The limit is detected by the saturation temperature (LP side), at P52 – P53 for 60 seconds. Normal operation resumes when the saturation temperature (LP side) rises to a sufficient level.  Display: E V A P T .

  • Page 68: Refrigerant Frost Limit Fault On Circuits 1 And 2

    15.2 Refrigerant frost limit fault on circuits 1 and 2 Frost on the heat exchangers is detected in two ways on most CIAT machines. - Detection method 1: sensors monitor for deviations in low pressure and in the water outlet temperature. Such deviations indicate that ice has started to form on the heat exchanger.

  • Page 69: Lp Fault On Circuit 1 Or

     Display: C I R x F A U L T x x m n C U T ( S ) 2 4 H If this fault causes more than shutdowns in 24 hours: - Corresponding circuit shut off. - Circuit x HP fault relay on optional board in On position. - Fault output off.

  • Page 70: Management Of Superheat Faults

     Saved in fault memory: x . C I R C U I T x  Resetting: - If the number of faults in 24 hours ≤ 3 → the fault is automatically acknowledged if BP > P55 + 2b. - If the number of faults in 24 hours >...

  • Page 71: Controls

    16 CONTROLS 16.1 Main control in cooling and heating modes Definition and principle: The chilled water and hot water temperatures are measured and compared with the setpoint value. Depending on the result, the compressor stages are turned on or off. This check is performed on the heat exchanger‟s water outlet (water supply = PIDτ) or water inlet (water return). 16.1.1 Operating mode selection (P119): - If P119 = 1 (Cooling) Cooling only.

  • Page 72: Water Temperature Setpoint Adjustment

    16.2 Water temperature setpoint adjustment The control mode is set using parameter P141. Value 1: set to water return. Value 2: set to water supply. Value 3: set to water supply with compensation by water return. Setpoint 2 allows a similar shift if control adjusted based on the outdoor air (If P127 = Yes or P131 = Yes) or allows the control mode to be changed if P54 (storage) = Yes.
  • Page 73 16.3.2 Water supply control (P141 = 2) If heating mode is selected with a water-to-water unit, the setpoint is adjusted based on the temperature measured by the hot water supply sensor. If cooling mode is selected and P6 = 1, the setpoint is adjusted based on the temperature measured by the heat exchanger outlet sensor.
  • Page 74  Compensator coefficient diagram: Compensation effect Temperature variation Example with a compensation factor of 0.5 Controller time delay P148 = 100 seconds Compensation time = 10 seconds Action of controller with Action of controller compensation without compensation Time saved by compensation A: 1st compensation result.

  • Page 75: Adjustment Of Setpoint For The Water Supply And Return Temperatures (P141 = 1 Or 2) If P7

    The related parameters are as follows: P145: P coefficient P148: T coefficient (polling time) P146: I coefficient P150: Minimum compensation setpoint P151: Compensation time P147: D coefficient S U P P L Y T E M P . : - x x . x ° S E T P O I N T : - x x .

  • Page 76: Storage Control Nverter

    16.5 Storage control - If setpoint 1 is selected, the control remains standard and the If P154 = No → The control mode remains standard and may be mode (supply or return) is selected by P141 (control mode). adjusted to the return or supply line depending on the value of - If setpoint 2 is selected, the control automatically switches to P141 (control mode).

  • Page 77: Automated Self-Regulating Control

     Slope adjustment in cooling mode The related parameters are as follows: P128: Outdoor temperature at start of drift in cooling mode P121: Cooling setpoint 1 P129: Outdoor temperature at end of drift in cooling mode P122: Cooling setpoint 2 P130: Maximum setpoint at end of drift in cooling mode P251 setpoint P251 setpoint...

  • Page 78: Forced And Self-Adjusting Control For A, B And C

    - The two fans 1 on circuit 1 will be controlled by stage 1 on circuit 1, motherboard terminal block J3 (terminal 5) - Fan 2 on circuit 1 will be controlled by stage 2 on circuit 1, motherboard terminal block J3 (terminal 6) - Fan 3 on circuit 1 will be...

  • Page 79: Fan Speed Control

    17.2 Forced and self-adjusting control The condensing pressure control can be forced in cooling mode in two cases: Case 1: If HP > P54 – P195 – 0.5, the fans run at maximum speed for 30 minutes and the stages turn on at 1-second intervals. This 30- minute runtime applies in case 2 as well.
  • Page 80 P21 = 3 with energy optimisation (Available only if P42 = ALCO or CIAT) Stage 1 Stage 2 Stage 3 étage If P180 = 3 stages: 15-30% and 70-85% for stages 2-3 6.8 b for R134a If P180 = 2 stages: 20 and 80% for stage 2 P183 = 7.8 b for R410A or 5.5 b for R407C, 5.0 b for R22 and...
  • Page 81 1 and 2 is turned on. a) P21 = 2 with acoustic optimisation b) P21 = 3 with energy optimisation (Available only if P42 = ALCO or CIAT) If P180 = 3 stages: 15-30% and 70-85% for stages 2-3...

  • Page 82: Low Noise Control (Single-Fan Units Only - Aquaciat2)

    17.3.6 Speed control of centrifugal fans (P10 = Centrifugal): P21 is hidden. This configuration is not available. The HP is controlled via the air blades. Refer to the section on controlling the air blades. 17.3.7 Speed control of electronically commutated pressure fans (P10 = Pressure): This function provides the same functionalities as the variable speed drive described above with the added possibility of allowing the customer to limit the speed of the fans in order to lower the sound level or best adjust the available pressure..

  • Page 83: Management Of The Air Blades If P10 = Centrifugal

    - P193 visible If P29 = Yes P 1 9 3 S T P S H I F T D U R I N G R E C O V E R Y Recovery input (10/11 on J6) will be used by the customer to define the operating mode: STANDARD or RECOVERY Two operating modes are possible if parameter P29 = Yes: Contact J6 - 10/11 on motherboard open without recovery:...

  • Page 84: Control Of Condensing Pressure For Water-To-Water Units

    18 CONTROL OF CONDENSING PRESSURE FOR WATER-TO-WATER UNITS These adjustments depend solely on your installation. It is 1) Operation with a two-way valve If municipal wastewater is used to cool the condenser, we essential that you ensure the correct operation of your unit. recommend installing the two-way valve so as to be able to set the condensing pressure to a value that will ensure correct 2) Operation with a three-way valve...

  • Page 85: Restriction To The Maximum Air Temperature In Heating Mode

     Fault message: M A C H I N E O F F C L G M O D E O U T T E M P . T O O H I G H  If a fault occurs: - Fault stored in memory in case of a mains power failure - Relay in On position - Fault saved in fault memory...

  • Page 86: Management Of The Auxiliary Heater Board And The Electric Auxiliary

    The electric stages are turned on if: Bus link with - the thermodynamic power is insufficient CONNECT 2 - faults occur on the compressor stages board - the outdoor temperature is less than P225 - the water return temperature is too low to allow defrosting ...

  • Page 87: Management Of The Back-Up Boiler

    21 MANAGEMENT OF THE BACK-UP BOILER If P111 = Boiler  Management under normal operation: Setpoint Setpoint Boilers only = f (Text) in °C Heat pump and boiler Heat pump only Outdoor air temperature (°C) - If the air temperature ≥ P226: heat pump alone - If the air temperature <...
  • Page 88  Designation of master machine: P 8 0 0 M A S T E R M A C H I N E L O O P Y E S Important: only one machine may be configured as the master on each loop. If the master machine has already been configured and you try to configure the slave machine as the master, the slave machine‟s parameter will be locked and not be accessible.
  • Page 89 On the backup machine the pumps are off, the LED flashes on and off at 1-second intervals and the following message is displayed: M U L T I U N I T M A N A G E M E N T B A C K U P M A C H I N E C) Forced stop of machines:...
  • Page 90 A) Cascade control: Machine 1 Stage 1 Machine 2 Stage 2 Master machine Note: P804 = Cascade → parameter P143 on each machine becomes equal to 1°C. This is because the interstage differential on each machine will be adjusted by the value of P143 on each machine. Machine 2‟s setpoint is shifted by P806 relative to machine 1‟s setpoint.

  • Page 91: Actuation Of The Electronic Expansion Valve

    Only fault feedback signals from the valve are managed in this case 23.2 With CIAT driver This configuration corresponds to using the electronic expansion valve with the CIAT expansion board and on which the Alco EXV miniboard with the software is connected.
  • Page 92 V C M X X . Y Y 23.2.2 Manual EXPANSION VALVE MODE if P42 = CIAT: If Test Mode is set to „Yes‟ it retains all standard testing functionalities and provides access to the manual override menu for the electronic expansion valves when –...

  • Page 93: Important Information Regarding The Control Of An Inverter Compressor

    To exit manual mode, press Reset. The expansion valve will automatically return to automatic mode if no buttons are pressed on the console for 15 minutes. 23.2.3 Control of electronic expansion valve at start-up if P42 = CIAT:  Comment: - The expansion valve‟s percentage of opening and slow mode (set to „No‟) are forced when the compressor is turned on.

  • Page 94: Defrosting Of The Evaporator Coils

    - General fault LED lit steady - Fault saved in fault memory 25 DEFROSTING OF THE EVAPORATOR COILS CIAT has developed an optimised frosting control system. continue producing hot water for hours during cold, dry weather Called DEGIPAC (P159 = optimised), it defrosts the evaporator without having to defrost the coils.

  • Page 95: Definition Of The Programming Stages

    26.2 Definition of the programming stages Setting: Starting time Ending time Selected days (M.T.W.T.F.S.S.) Type of regulation: Setting 1 – Stop/Setting 2 – Stop/setting 1 – setting 2 / setting 2 – setting 1/non valid. Setting by fault: Starting hour: 0h00 Ending hour: 0h00 Validated days: none Type of regulation not validated.
  • Page 96 ↑ T Y P E C O N T R O L ↓ S E T P O I N T 1 – O F F ↑ T Y P E C O N T R O L ↓ S E T P O I N T 2 –...

  • Page 97: Communication Protocol

    Example: Prog 1: 7-12h CSG1-CSG2 MTW TF Prog 2: 10-18h CSG1-stop Holiday zone: 10-08 / 30-08 : stop Prog 1: MTWTF Prog 2: MTWTF Setting 1 Setting 1 Setting 2 Setting 2 Result: Status: MTWTF Status: MTWTF Setting 1 Setting 1 Setting 2 Setting 2 Saturday and Sunday not being selected in the hourly programming, the unit is therefore stopped.

  • Page 98: Customer Access Bit

    Register Register No. Description Format Type hexadecimal decimal Registers accessible in read-only mode (Functions 3 or 4) CONTINUED 0x22 and 0x23 34 and 35 P286 Cooling mode runtime (in hours) Float Read-only 0x24 and 0x25 36 and 37 P287 Pump 1 runtime (in hours) Float Read-only 0x26 and 0x27...
  • Page 99 Hexadecimal bit Bit No. Description Type decimal 0x0d to 0x0f reserved (continued) 0x15 Pump fault, 1 loop Read-only 1 = Fault 0x16 Pump fault, 2 loops Read-only 1 = Fault 0x17 Heat exchanger inlet sensor fault Read-only 1 = Fault 0x18 Heat exchanger outlet sensor fault Read-only...
  • Page 100 Hexadecimal Bit No. Description Type bit No. decimal 0x82 to 0x9f reserved 0x100 Circuit 2 fault summary Read-only 1 = Fault 0x101 Stage 1, circuit 2 fault Read-only 1 = Fault 0x102 Stage 2, circuit 2 fault Read-only 1 = Fault 0x103 Manual HP fault, circuit 2 Read-only...
  • Page 101 S.A. au capital de 26.728.480 d’euros - R.C.S. Bourg-en-Bresse B 545.620.114 d’améliorer matériel, product improvement, CIAT reserves Verbesserung seiner Geräte, constante de su material, CIAT se CIAT se réserve le droit de the right to make any technical behält sich CIAT das Recht vor, reserva el derecho a realizar procéder sans préavis à...

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