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AERMEC Multichiller Manual
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AERMEC Multichiller Manual

AERMEC Multichiller Manual

Control system for the management of several chillers
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UNIQUE MANUAL
Control system for the management of several chillers
multi chiller
0609 - 5148051_01

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Summary of Contents for AERMEC Multichiller

  • Page 1 UNIQUE MANUAL Control system for the management of several chillers multi chiller 0609 - 5148051_01...
  • Page 2 Precautions and safety regulations DO NOT let the Handle with care DO NOT tread on the packaging packaging get wet Disposal information Note sulla manualistica Warning: this product contains electric and Keep the manuals in a dry place - to maintain their good condition - for at least 10 electronic equipment that cannot be scrapped years, for any future reference needs.
  • Page 3 Index Introduction Multichiller Architecture Multichiller -- PCO2 Interface Hardware Multichiller -- GR3 Interface Hardware PCO1 Input/Output cards PCOE Input/Output cards User interface Description of physical key function Description of virtual key functions Main menu User Menu Display Menu Setup Menu...
  • Page 4 IThe maximum number of units that can a control system (which hereon will be on/off at the same time (recommended if all be connected to a Multichiller is Max 9 called Multichiller) for the switching on of the chillers have the same pump)
  • Page 5 Multichiller architecture • It is a PCO1 controller and PGD3 touch screen display: The product is supplied in IP55 box with transparent 320X240 pixel 320X240 pixel Colori Colori observation window Touch screen Touch screen chiller PGD3 display sonde PCOE interfaccia...
  • Page 6 Multichiller/PCO2 interface hardware chiller 1 chiller 2 chiller N master master slave 1 slave 2 master interfaccia AER485P2 MODBUS RS485 modbus multichiller...
  • Page 7 Multichiller/GR03 interface hardware chiller 1 chiller 2 chiller N AER485 AER485 AER485 modbus multichiller...
  • Page 8 Enabling of multifunction inputs (Mult) Contact closed = multifunction enabled Flow meter 1 (FL1) Flow meter 2 (FL2) Flow meter 3 (FL3) Not used DIGITAL OUTPUTS FUNCTION Summary of chiller and Multichiller global alarms ANALOGUE OUTPUTS FUNCTION Not used PCOE card Inputs/Outputs ANALOGUE INPUTS FUNCTION...

  • Page 9: User Interface

    User interface The user interface is made up of a 320x240 pixel colour touch screen graphical display. The keys used to access the various menus can therefore be of two types: Physical, the traditional keys on the keyboard at the right of the screen. Virtual, the keys represented graphically on the display that can be “pressed”...
  • Page 10 Off by timer = plant off due to time period Off by keyboard = plant switched-off by Multichiller disable = the management of the multichiller on the plant is disabled and all chillers are in ON, the multichiller only functions as a data supervisor.
  • Page 11 Time period controls, global on/off and switching-off of the individual chillers remain always active. The Multichiller with this parameter in OFF only functions as plant super- visor Global On/Off: centralised switch on/off control of all chillers.
  • Page 12 Note: External Cooling Set : visualisation of the cold set point obtained from analogue input if function enabled External Heating Set: visualisation of the hot set point obtained from the analogue input if function is enabled External Chiller Demand: visualisation of the 0-100% power reque- sted by analogue input if function is enabled External Limit: visualisation of the power limit from analogue input if function is enabled...
  • Page 13 Note: Day: selects the day of the week for which the time period is to be set. Start1 : plant switch-on time for the first period Stop 1: plant switch-off time for the first period Start 2 : plant switch-on time for the second period Stop 2 : plant switch-off time for the second period Note: Weekly time programming: In this window it is possible to set time, date and...

  • Page 14: Display Menu

    SIW: return water temperature to the primary. It is read by the Multichiller SUW, SUW2, SUW3: delivery temperatures to the secondary circuit. Up to 3 branches of the secondary circuit can be managed for secon- daries with variable chiller.
  • Page 15 Type of machine NRA, NRC, NLW, NBW Note: Chiller model Serial address On/Off state of the chiller and functioning mode Circuits 1 and 2 alarm summary, the flashing symbol LED indicates an alarm is present Compressor state Note: Temperature and pressure inputs, the abbreviations correspond to those on the display Note: Alarms present (the...
  • Page 16 Type of machine RV, RVB, NW, NSB, WSB Note: Chiller model Serial address Card selection : Master, Slave 1,2,3 if present On/Off state of the chiller and functioning mode Circuits 1 and 2 alarm summary, the symbol flashing LED indicates an alarm is present Compressor state Note:...

  • Page 17: Setup Menu

    In this case, the consequent parameter is set. However, con- nection of the slaves is not indispensable for correct functioning of the Multichiller. Note: Setting of plant chiller serial addresses. The addresses that have been assigned to the chiller are set. For RV, RVB, NW, NSB, WSB series machines, it is also possible to set the addresses of the cards relative to the compressor slaves if they have AER485P2 interface.
  • Page 18 Note: Adjustment selection for Load or Temperature) Filter on the holding of the increase or decrease condition of the num- ber of chillers. Minimum delay between switch-on of two chillers Minimum delay between switch-off of two chillers Note: Check on the basis of the load: Delta T of a chiller at full power Minimum choke of a chiller Choke of chillers switched-on, beyond which the next is introduced.
  • Page 19 Note: Check on the basis of the temperature: Settings for the functioning mode when hot Temperature of the SUW probe/s (delivery), below which the intro- duction of a chiller is requested Temperature of the SIW probe (return) above which the disconnec- tion of a chiller is requested.
  • Page 20 Note: Type of analogue input malfunction: 0-5V Minimum voltage Maximum temperature Note: Type of analogue input malfunction: 0-20mA Minimum current Maximum current Note: Use of the multifunction input as Set point Cold set point when the input is at maximum Cold set point when the input is at minimum Hot set point when the input is at maximum Hot set point when the input is at minimum...
  • Page 21 Note: Use of the multifunction input as Demand Request N° chiller with input at maximum Request N° chiller with input at minimum (fixed at 0) Note: Use of the multifunction input as Limit N° chiller limit with input at maximum N°...
  • Page 22 Note: Load set default Note: Modify password...
  • Page 23 On the basis of the adjustment logic, for optimisation of plant production pressors) that are available on the basis the Multichiller increases or decreases (Load). These logics are used to give a of the adjustment and the setting. The the number of chillers switched on.
  • Page 24 Sequential mode % Load to start next = 100 , % Load chiller to stop next = 85 Switch-on The first chiller is always On. The second chiller is switched-on when the first is at 100%. The third chiller is switched-on when the other two are at 100% Switch-off The third chiller is switched-off when it is expected that the two remaining switched-on do not increase the power beyond 85%.
  • Page 25 Load adjustment: TEMPERATURE Probe position: the SUW probe (or probes) must be positioned on the secondary circuit delivery, after the disconnecting device; the SIW probe on the on the primary in the return input to the chillers after the disconnecting device. Plant features: management is optimised for plants where each chiller controls its own pump (on/off together with the chiller) and with secondaries with variable flow in the basis of the load.
  • Page 26 Timing Independently from the type of adjustment used (Load or Temperature), delays and switch-on/switch-off filters are envisioned. This is to prevent sudden temperature changes and allow the chillers to switch-on, activate the compressors and stabilise themselves before carrying out other switch-ons, or on switch-off wait for the chillers to go to constant power before switching the others off.

  • Page 27: Multifunction Inputs

    Limit = limits the max. number of chillers that can be switched-on Demand = request for number of chillers switched-on. The Multichiller no longer controls the number of chillers on the basis of the probes.

  • Page 28: Double Set Point

    ID3 closed = use 2nd set point ID3 open = use normal set points Priority set point If several functions co-exist, the Multichiller will use the highest priority set point. The set points are listed below starting from the one with highest priority. Double set...
  • Page 29 Multichiller Alarms The following alarms force the num- (except Multichiller requires all switched off) They have ber of chillers requested switched-on, Enable = OFF that requests all switched automatic reset independently from other controls, to 1 on and Global On/Off = OFF that The value read by the SIW probe is out of range -35°C / 80°C...
  • Page 30 The value read by the SUW3 probe is out of range -35°C / 80°C independently if it is connected to the PCO1 or PCOE card It is not possible to establish a connection with chiller N 1-9 It is not possible to establish a connection with the PCOE expansion card...
  • Page 31 PCOE2 (Chiller) The following alarms force the num- (except Multichiller res all switched off) They have automa- ber of chillers requested switched-on, Enable = OFF that requests all switched tic reset independently from other controls, to 1 on and Global On/Off = OFF that requi-...
  • Page 32 PCO1 connection Probes and digital inputs Programming Key Clock card 230Vac Analog SelectionSerial Card Fuse 24 0 C a b l e s e c t i o n Max. distance (m) C a b l e s e c t i o n Max.
  • Page 33 PCO1 connection Multifunction input Programming Key Clock card Analog SelectionSerial Card Fuse 0-20mA 24Vdc 0-5mA Sonda NTC 10 kohm C a b l e s e c t i o n Max. distance (m) (mm2)
  • Page 34 PCO1 connection Connection to PDG03 display RS 485 Twisted and shielded pair AWG 22 Max. distance 200m Programming Key Clock card 230Vac Analog SelectionSerial Card Fuse 24 0 N.B: Respect the G with G and G0 with G0 connections in the pCO1 and display power supply...
  • Page 35 PCO1 connection PCOE expansion connection +5V Ref IDC1 +Vdc +5V Ref +Vdc Programming Key Clock card 230Vac Analog SelectionSerial Card Fuse 24 0 Twisted and shielded pair AWG 22 Max. distance 600m N.B: Remember to respect the G with G and G0 with G0 connections in the pCO1 and expansion power supply if the same secondary circuit is used in the transformer...
  • Page 36 PCO1 connection Serial chiller connections AER485P2 (series RVBH, NSB, WSB) Serial Card Programming Key Clock card Analog SelectionSerial Card Fuse...
  • Page 37 PCO1 connection Serial chiller connections AER485 (series NRA, NRC, NLW, NRL) Si dovrà inserire la ferrite in dotazione sul cavo di collegamento seriale, posizionandola in prossimità della scheda AER485. L'in- stallazione della ferrite dovrà essere eseguita effettuando due giri del cavo attorno alla ferrite. T / - Programming Key Clock card...
  • Page 38 Collegamento PCO1 Type of connection bus between multichiller and chiller PCOE expansion +5V Ref IDC1 +Vdc +5V Ref +Vdc Multichiller Multichiller Chiller Connect a 120 ohm resistance tot he first and last node (1/4 W) (included in the kit)