RG66000889-REV.OO 38
Page 1: ...Water chillers and heat pumps USER MANUAL GB LCA LCW LCR ...
Page 2: ...tive messages on display 6 3 4 Functions of the buttons for panel mounted versions 10 3 5 Functions of the buttons wall mounted units 10 3 6 Inputs and Outputs 11 4 Parameters 12 4 1 Parameters description 16 5 Alarms and messages 29 5 1 Other alarms 30 5 2 Unit indication sequences 31 6 Infrared remote control unit 32 7 Wiring connection 33 8 Optional boards 34 8 1 Serial card RS485 34 9 Technica...
Page 3: ...l card makes it possible to be linked to a centralized computer so as to obtain remote supervisory and or telemaintenance services 2 General Description 2 1 Functions µchiller is a multi processor system designed for the control of air water chillers air water heat pumps water water chillers water water heat pumps with gas reversibility water water motoevaporating units µchiller is based on two in...
Page 4: ...al safety to the data 2 3 Second compressor board It represents an expansion of the main board which proves to be useful for the management of a second compressor unit in this case only the COMP 2 terminal connection used to manage the relative solenoid valve must be effected The connection areas are the following clockwise analog inputs B4 and B5 for the probes connection relative to the second c...
Page 5: ...he User is informed of the status of the unit by means of five LED indicators on the terminal display and two LED indicators yellow and green placed on the main board Meaning of LED indicators in single compressor units LED Flashing Steady Comp left Not used Not used Comp right Request for compres 1 Compressor 1 actuated Cooling Cooling Heating Heating x100 Value x100 Meaning of LED indicators in ...
Page 6: ...within 60 seconds after having entered this procedure the unit will return to normal operation without storing the values of the modified parameters Setting and displaying USER parameters These working parameters are protected by a password 22 to prevent any unauthorized access to the data Press PRG for more than 5 seconds the buzzer must be off to enter the USER parameters the unit operating para...
Page 7: ...essed FACTORY set parameters selection the display shows the code of the factory set parameter that can be modified Pressing and allows to scroll all factory set parameters Press SEL again to display the required Factory parameter and modify its value with the and buttons Press PRG to store the modified parameters and exit the procedure while the SEL button allows to return to the Factory paramete...
Page 8: ... mode if the unit is actually operating in the heating mode pressing the UP button will not swap the current mode Enabling disabling of HEATING operating mode The Heating operating mode can be enabled disabled by pressing the button in panel mounted versions for more than 5 seconds see if necessary the parameter P6 It is not possible to directly pass from the Cooling to the Heating operating mode ...
Page 9: ...ptional into the EEprom of the unit When the procedure is over the display will show CE to confirm the operation Copying the unit s EEprom in the key Press PRG and at µchiller start up to copy the unit s EEprom into the removable hardware key option When the procedure is over the display will show EC to confirm the operation Setting DEFAULT PARAMETERS Press the PRG button at µchiller start up to s...
Page 10: ...the codes of the parameters Displays values increases value Normal operating condition after 5 enables inhibits Heating mode List of codes displays the codes of the parameters Displays values decreases value PRG SEL Normal operating condition after 5 password for FACTORY parameters SEL Normal operating condition temperature pressure conditions permitting after 5 forces a manual defrosting cycle No...
Page 11: ...ND Condensation control probe circuit1 for fans speed regulation in chiller mode or for the control of defrosting in heat pump mode B4 GND Evap outlet water temp probe circuit 2 antifreeze B5 GND Condensation control probe circuit 2 for fan speed regulation in chiller mode or for the control of defrosting in heat pump mode ID1 IDCOM High pressure circuit 1 ID2 IDCOM Low pressure circuit 1 ID3 IDCO...
Page 12: ...aporator outlet water B2 e B40 On Off 1 NTC Carel F 0 1 flag 1 1 3 Type of condensation probe circuit 1 and 2 1 NTC Carel 2 pressure 4 20mA F 0 2 flags 1 2 4 Min value current input F 0 5 bar 1 0 CS 5 Max value current input F 4 35 bar 1 30 CS 6 Probe at evaporator water inlet ambient air probe B1 calibration U 6 0 10 8 6 0 10 8 C F 0 1 0 7 Probe outlet water circuit 1 B2 calibration U 6 0 10 8 6 ...
Page 13: ... compressor before ending the capacity controlled routine U 0 15 sec 1 0 B c6 Time delay at start up U 0 150 sec 10 0 c7 Delay in switching on compressor after switching on the pump U 0 150 sec 1 20 c8 Delay in switching OFF compressor after switching OFF the pump U 0 150 min 1 20 c9 Timer compressor 1 D 0 19900 ore cA Timer compressor 2 D 0 19900 ore B cb Timer threshold for maintenance alarm U 0...
Page 14: ... 4 d4 d4 d4 C F bar 0 1 0 1 0 0 D S d4 End defrosting temperature End defrosting pressure U d3 d3 d3 50 122 5 C F bar 0 1 0 1 0 0 D S d5 Min time interval to start a defrosting cycle U 10 150 sec 10 0 D S d6 Min duration of a defrosting cycle U 0 150 sec 10 0 D S d7 Max duration of a defrosting cycle U 1 15 min 1 0 D S d8 Time delay between 2 defrosting cycles within the same circuit U 10 150 min ...
Page 15: ...AIR AIR heat pump not applicable 2 AIR WATER chiller 3 AIR WATER heat pump 4 WATER WATER chiller 5 WATER WATER heat pump with gas reversibility 6 WATER WATER heat pump with water reversibility F 0 6 flag 1 4 H2 Number of ventilating circuits 0 1 ventilating circuit 1 2 ventilating circuits F 0 1 flag 1 0 V SB H3 Number of evaporators 0 1 evaporator 1 2 evaporators F 0 1 flag 1 1 B H4 Compressor wi...
Page 16: ...bridge terminals 1 and 2 on pin strips P2 and P3 bridge terminals 2 and 3 for accepting ON OFF signals If you are using an ON OFF contact and inputs are detected open antifreeze heaters will be activated antifreeze alarm will be activated after any delay on start up A3 parameter 3 Type of condensation probe for circuit no 1 and 2 B3 and B5 This parameter indicates the operating logic of the analog...
Page 17: ...ure variation range is 0 1 1 5 units bar C or F according to the probe and the measurement scale about every second Giving this parameter low values allows to limit impulsive noise effects Recommended value 8 d Measurement scale It allows to set the operating mode either in degrees Centigrade or Fahrenheit As the parameter varies µchiller automatically turns the values into the new measurement sca...
Page 18: ... set point It allows to set the Heating set point reverse r4 Heating differential It allows to set the Heating differential Heating functioning mode 1 compressor Cooling functioning mode 2 compressors or capacity controlled routine Cooling functioning mode ON OFF probe r5 Compressors rotation This function makes it possible to activate the compressors so as to balance their operating hours They ar...
Page 19: ...set the maximum Heating set point Compressor parameters c c1 Minimum ON time It sets the time interval when the compressor must go on operating after it has been turned ON even if there is no more request for it c2 Minimum stopping time It sets the time interval when the compressor must remain OFF after it has been turned OFF even if there is a request for its turning on During this phase the LED ...
Page 20: ...led routine c6 Delay at start up This parameter allows to set a time delay at the compressors start up so as to balance current absorption and to protect the compressor s from repeated start ups when there is some interruption in the power supply c7 Delay in switching ON compressor after switching ON the pump inlet fan AIR AIR Both in the Cooling and Heating operating mode with the pump actuated u...
Page 21: ...intenance If cb 0 this function will be ignored cC Timer of pump Inlet fan AIR AIR It allows to set a threshold operating hours for the pump or the inlet fan When the value is being displayed press simultaneously and to reset the timer Fans parameters F F1 Fans output Determines the operating logic of the fans 0 no fans no control action relative to fan overload 1 system with fans This selection r...
Page 22: ...page 60 to find the value of F3 If either the ON OFF converter code CONV0NOFF0 or the PWM 0 10V converter code CONV0 10A0 are used we recommend to set this parameter to 0 and close the jumpers P1 and P6 located in the single compressor board and in the expansion for control of the second compressor F4 Maximum tension threshold for Triac With fans speed regulation phase cut optional board is requir...
Page 23: ...eter allows to set the temperature or pressure above which the fans are turned OFF in order to avoid overload for the compressor due to high evaporating temperatures For Heating activation there is a pre differential with respect to the set point of 1 C when using NTC probes for the control of condensation B3 and B5 and of 0 5Bar when using pressure probes Fb Fans starting time It allows to set th...
Page 24: ...cuits If d9 0 defrosting in the two circuits will be performed at the same time dA Defrost end detected by an external digital contact It activates the end of defrosting cycle from digital contact for example a pressostat The contacts are to be connected in the place of the condensation removal fan overload ID4 for circuit1 and ID11 for circuit2 By enabling the end of defrosting from digital input...
Page 25: ...ers A A1 Antifreeze It indicates the water temperature at the evaporator outlet below which the unit prompts an antifreeze alarm In the event of antifreeze alarm the compressor will be stopped but the pump remains ON The reset is manual and takes place only when the water temperature returns within the operating limits that is when it exceeds the value A1 A2 this alarm activated according to B1 or...
Page 26: ... at compressor start up so as to reach a normal flow rate avoiding any unstable signal from the sensor P4 Buzzer It indicates how long the buzzer will sound in the event of an alarm situation if P4 0 the buzzer remains always OFF with a range between 1 and 14 minutes the buzzer automatically silences after the selected P4 time if you set P4 15 the buzzer will not stop until the alarm condition dis...
Page 27: ...e to connect two fan regulation boards increasing the size of the fans that can be managed by µchiller H3 Number of evaporators It indicates the number of evaporators in two compressor configurations When there is one evaporator heaters management and antifreeze control will be performed only by B2 H4 Capacity controlled Compressors in parallel mode In two compressor units this parameter allows to...
Page 28: ...parameters modification This parameter allows to disable the procedure through which can modify DIRECT and USER parameters through keyboard or through remote control In this way you will be able to display the parameter but not to modify them The following functions will also be disabled Cooling Heating selection forced defrosting and timers reset The table below shows how to set the parameter Val...
Page 29: ...open P3 manual automatic with P5 1 L1 Compressor 1 overload 3 open automatic C1 Fan overload circuit 1 4 open automatic F1 Flow switch 5 open P1 e P2 manual automatic with P5 1 FL High pressure circuit 2 8 open manual automatic with P5 1 H2 Low pressure circuit 2 9 open P3 manual automatic with P5 1 L2 Compressor 2 overload 10 open automatic C2 Fan overload circuit 2 11 open automatic F2 Active if...
Page 30: ...e and at the same time the buzzer the alarm relay and the lighting of the display are activated If the temperature exceeds the set threshold the heater turns OFF and all the other controlled devices remain OFF until the alarm reset procedure takes place keys pressed simultaneously for 5 seconds in the panel mounted terminal CLEAR key pressed for 5 seconds in the wall mounted terminal The antifreez...
Page 31: ...ting cycle ends for time out but instead an end has been selected for the defrosting cycle when the threshold is reached or from an external contact the unit will display r1 or r2 This message can be cleared through the alarm reset procedure or by carrying out a new defrosting cycle correctly In this case neither the buzzer nor the alarm relay will activate the yellow LED on the board will go on b...
Page 32: ...u have modified the parameter value the unit will automatically display the code of the modified parameter When programming µchiller via remote controller the dedicated LED on the display see the chapters 3 and 3 3 will blink If you do not press any button within 50 seconds after having started the programming procedure via remote control unit the unit exits the configuration procedure without sto...
Page 33: ...RG66000889 REV 00 33 7 Wiring connection The drawings below show the wiring connection of the unit and of the remote terminal ...
Page 34: ... case by suitably setting parameter 3 and pin strips P4 and P5 located on the main board The pressure transducers has to be connected to boards with 24V terminal 8 Optional boards 8 1 Serial card RS485 The Serial card RS485 allows you to interface the µchiller to a supervisory network in RS485 standard asynchronous The card has 4 dip switches that enables you to extend the µchiller addressing up t...
Page 35: ...ted into Class I or II equipment Categ of heat and fire resistance D PTI of the of the insulating materials 250V Class and structure of the software A Serial output Connector 3 way screw terminals for cables with 0 2mm 2 min section and 1 5mm2 max section Optoinsulated asynchronous RS485 Transfer rate 19200 baud Device maximum number 199 Max distance from the supervisor 1 Km Cable to be utilized 1...
Page 36: ...e compressor board no 3 on expansion board no 3 of them reversing valve circuit 1 and 2 and alarm relay with double terminal the others with Normally Open logic Switching power 10 A res at 250V AC3 class with cos ϕ 0 7 maximum load of 1 3 HP Technical specifications Working temperature 10T65 C Storage temperature 20T70 C Working humidity 90 rH not condensing Storage humidity like operating humidit...
Page 37: ...e ground Class 1 by using to supply the system a transformer equipped with principal insulation earthed secondary and safety conductor in order to ensure the required protection against electric shocks Before operating on the board during the mounting maintenance and replacement operations cut off the power supply The protection against the short circuits due to faulty wiring must be guaranteed by...
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Page 40: ...40010 Bentivoglio BO Via Romagnoli 12 a Tel 051 8908111 Fax 051 8908122 www galletti it ...
