Mitsubishi Electric i-BX-N Technical Manual
  1. Manuals
  2. Brands
  3. Mitsubishi Electric Manuals
  4. Heat Pump
  5. i-BX-N
  6. Technical manual

Mitsubishi Electric i-BX-N Technical Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
TM_i-BX(-N)_NC05_00_06_20_EN
TECHNICAL MANUAL
Translation of the original instructions
i-BX(-N)
Version NC05
EN
The information in this document may be modified without prior notice.
The reproduction and/or dissemination of this document, even in part, is prohibited
without the written consent of MEHITS SpA.
1
MEHITS S.p.A.
●
TECHNICAL MANUAL
Version NC05 - Translation of the Original Instructions

Advertisement

Table of Contents
loading

Related Manuals for Mitsubishi Electric i-BX-N

Summary of Contents for Mitsubishi Electric i-BX-N

  • Page 1 TM_i-BX(-N)_NC05_00_06_20_EN TECHNICAL MANUAL Translation of the original instructions i-BX(-N) Version NC05 The information in this document may be modified without prior notice. The reproduction and/or dissemination of this document, even in part, is prohibited without the written consent of MEHITS SpA. MEHITS S.p.A.
  • Page 2 TM_i-BX(-N)_NC05_00_06_20_EN Page left intentionally blank MEHITS S.p.A. ● TECHNICAL MANUAL Version NC05 - Translation of the Original Instructions...
  • Page 3 TM_i-BX(-N)_NC05_00_06_20_EN Before carrying out any operation on the machine, you must carefully read this manual and make sure you understand all the instructions and information given Keep this manual in a known and easily accessible place to refer to as necessary during the entire life-span of the unit.

  • Page 4: Table Of Contents

    TM_i-BX(-N)_NC05_00_06_20_EN CONTENTS 1 ..INTRODUCTION ..............................7 ..OPERATING REQUIREMENTS ..................................7 GENERAL FUNCTIONS ....................................7 ..2 ..USER INTERFACE ............................... 8 ..USER TERMINAL ......................................8 2.1.1 Buttons general functions ..................................8 ..GENERAL CHARACTERISTICS OF THE INTERFACE ..........................8 2.2.1 ..Password management ...................................8 2.2.2 ..
  • Page 5 TM_i-BX(-N)_NC05_00_06_20_EN 4.9.2.2 Regulation based on the external temperature up to version NC04.00 relC40 (not on three-phase i-BX-N units)....42 4.9.2.3 Regulation based on the external temperature starting from version NC04.00 relC50 .............. 42 4.9.3 ..Activation of the pressure safety control ...............................42 4.10...
  • Page 6 TM_i-BX(-N)_NC05_00_06_20_EN SYMBOLS: A number of symbols are used to highlight some parts of the text that are of particular importance. These are described below. CAUTION: Information on the occurrence of situations/operations which, if ignored or not duly acted upon, could put not only the Unit but also the functions of the Software and the various electronic parts at risk.

  • Page 7: Introduction

    (therefore, there will be 4 different password-protected access levels). i-BX and i-BX-N units will be able to regulate the production of system water in a “traditional” manner, which means on the basis of a fixed setpoint that can be set by the user, or in an “advanced”...

  • Page 8: User Interface

    TM_i-BX(-N)_NC05_00_06_20_EN USER INTERFACE USER TERMINAL The interface that can be used with the controller is a pLDPRO interface with graphic display. The connected pLDPRO interface does not have a sensor. Therefore, it can only guarantee unit control. pld-PRO interface (on board of the unit): 2.1.1 BUTTONS GENERAL FUNCTIONS Description...

  • Page 9: Main Menu Masks

    Date ( / / ) External air temperature BT7 Type of operation ○,3 ○,8 ○,13 Operating status (see below) Domestic hot water 3-way valve in operation (i-BX-N only) ○,4 ○,9 ○,14 Unit displayed Fan in operation Defrost active (i-BX-N only) ○,5...

  • Page 10: Main Menu Mask Scrolling

    TM_i-BX(-N)_NC05_00_06_20_EN 2.2.2.2 Main menu mask scrolling The UP and DOWN keys can be used to display all the screens showing machine status real time data. Some of these masks are only available to Service or Factory password holders. High Temperature system side information [Only visible if the zones are configured with parameter 016A] ○,1 ○,5...
  • Page 11 TM_i-BX(-N)_NC05_00_06_20_EN Close ○,4 Evaporation pressure [bar] System heating heater/boiler information [Mask visible if 0300 >0 (heater present) or if 0301 = YES (boiler present)] ○,1 ○,3 External temperature System water heater status Replacement Integration ○,2 Boiler status / Boiler Replacement Integration Fan information [Only visible with Service password]...
  • Page 12 TM_i-BX(-N)_NC05_00_06_20_EN Compressor information [Only visible with Service password] ○,5 Delivery pressure ○,1 System request ( ○,6 Delivery temperature ○,2 Domestic hot water request ( ○,3 Status ○,7 Return pressure Force off - Forced off due to an external condition that immediately switches off the compressor, or keeps it off [for example, the compressor is forced in the OFF condition for pre-ventilation purposes, or if the pressure delta is too high for a start] Alarm - compressor alarm...
  • Page 13 Storage tank heater not active active Inertial storage tank information [Only visible with the Installer or Service password - only for i-BX-N and if the BT9 probe has been enabled - parameter 0314 = YES] ○,1 ○,3 Water temperature setpoint Storage tank internal water temperature ○,2...

  • Page 14: Ambient Thermostat

    The interface that can be used with zone control (accessory) is an N-THC graphic display. The N-THC interface is used for zone control and is specific for i-BX-N units. The N-THC thermostat for i-BX-N units requires 230 Volt power supply.

  • Page 15: Parameters Table

    The following table lists the controller parameters and the relative maximum and minimum values. CAUTION: The Default column of the following table only shows the values assigned to the parameters relating to the i-BX-N 013M unit. Changing the value of some parameters causes the value of others to change automatically, so it is recommended to check the parameters again at the end of the parameter setting.
  • Page 16 TM_i-BX(-N)_NC05_00_06_20_EN Num Par Description Default Unit Min. Max. P010H Type of integration for plant boiler(0: Integration; 1: Replace) P010J Plant set from external 0-5V(0:NO; 1:YES) P010L 15.0 °C P010N External low temperature setpoint limit (Winter) P010M 100.0 External setpoint signal start value in Winter P010N 25.0 °C...
  • Page 17 TM_i-BX(-N)_NC05_00_06_20_EN Num Par Description Default Unit Min. Max. P0151 Delay time between 2 sniffers antifreeze (in tenth of second) P0152 Enable outdoor reset winter (0:NO; 1:YES) P0153 45.0 °C P015R P015T Fixed setpoint for plant circuit (Winter) P0154 Enable outdoor reset summer (0:NO; 1:YES) P0155 °C P015M...

  • Page 18: Menù 02

    TM_i-BX(-N)_NC05_00_06_20_EN Num Par Description Default Unit Min. Max. P019D Configuration of digital input 9 (0: LOW ENERGY FARE; 1: BACKUP BOILER) P019E Logic of summer/winter output (0: NORMALLY OPEN; 1: NORMALLY CLOSED) P019F Configuration NO4 pCOe n.1 (0: ZONE HT1; 1: SUMMER/WINTER) 2.4.3 MENÙ...

  • Page 19: Menù 03

    TM_i-BX(-N)_NC05_00_06_20_EN 2.4.4 MENÙ 03 Num Par Description Default Unit Min. Max. P0300 Plant integration Heaters number P0301 Boiler plant present (0:NO; 1:YES) P0302 Enable heaters during defrost (0:NO; 1:YES) P0303 External probe is enabled for heaters regulation (0:NO; 1:YES) P0304 -5.0 °C -999.9...

  • Page 20: Menù 06

    TM_i-BX(-N)_NC05_00_06_20_EN 2.4.7 MENÙ 06 Num Par Description Default Unit Min. Max. P0603 Maximum speed of plant pump for 1st curve P0604 Maximum speed of plant pump for 2nd curve P0605 Maximum speed of plant pump for 3rd curve P0606 Maximum speed of plant pump for 4th curve P0609 99.9 Minimum speed of DHW pump...

  • Page 21: Menù 09

    TM_i-BX(-N)_NC05_00_06_20_EN Num Par Description Default Unit Min. Max. P0814 °C -999.9 999.9 Set temperature end defrost P0815 Enable dynamic defrost function (0:NO; 1:YES) P0816 °C -999.9 999.9 Dynamic defrost - External temperature threshold P0817 -999.9 999.9 Dynamic defrost setpoint differential P0818 15.0 °C...

  • Page 22: Menù 12

    TM_i-BX(-N)_NC05_00_06_20_EN 2.4.12 MENÙ 12 Num Par Description Default Unit Min. Max. P1200 Protocol BMS setting (1=CAREL RS485; 2=ModBus RS485; 3=pCOload local) P1201 baud Setting BMS speed (0: 1200; 1: 2400; 2: 4800; 3: 9600; 4: 19200) P1202 Address of the controller in a supervisory system network n.1 P1214 Disable the automatic management of alarm buzzer (0: Device is controlled by system variable BUZZER;...
  • Page 23 TM_i-BX(-N)_NC05_00_06_20_EN Num Par Description Default Unit Min. Max. P131M 9999 Delay time Off geothermal pump from Off compressors P131N Min speed evaporation P131P Max speed evaporation P131Q steps Valve opening in independent equalization P131R Perc Min speed condensation P131T Perc Max speed condensation P131U Forcing time for fan a max working speed at startup...
  • Page 24 TM_i-BX(-N)_NC05_00_06_20_EN Num Par Description Default Unit Min. Max. Set voltage to stop external exchanger P133U P133V 95.0 P1367 P138H Compr. Max Speed in certain condition (rps) P133W 95.0 P1367 P138H Customer specification max rotation speed (external temperature control) P133X 36.0 °C -999.9 999.9...
  • Page 25 TM_i-BX(-N)_NC05_00_06_20_EN Num Par Description Default Unit Min. Max. P136P High pressure probe model (0: 0/5V;1: 4..20mA) P136Q Low pressure probe model (0: 0/5V;1: 4..20mA) P136R Type of NTC of B7 (0: NTC; 1: NTC-HT) P136S Type of NTC of B12 (0: NTC; 1: NTC-HT) P136T EEV indepentent preopening P136U...
  • Page 26 TM_i-BX(-N)_NC05_00_06_20_EN Num Par Description Default Unit Min. Max. P139M Alarm reset type 7 power+ (0: Manual; 1: Semi-Automatic) P139M Alarm reset type 8 power+ (0: Manual; 1: Semi-Automatic) P139N Alarm reset type 9 power+ (0: Manual; 1: Semi-Automatic) P139N Alarm reset type 10 power+ (0: Manual; 1: Semi-Automatic) P139N Alarm reset type 11 power+ (0: Manual;...

  • Page 27: Menu 14

    TM_i-BX(-N)_NC05_00_06_20_EN 2.4.14 MENU 14 Part n. Description Default Unit Min. Max. P1402 System flow switch alarm dalay time at pump start P1403 Alarm delay time System flow switch in steady operating P1404 Reset system flow switch (0=Auto; 1=Manual) P1405 Pump stop time after warning P1406 Condensing fan control mode - 0: Condensing Pressure;...

  • Page 28: Alarms

    TM_i-BX(-N)_NC05_00_06_20_EN ALARMS The table below shows the possible alarms for i-BX(N) units with Nadisystem sw. The alarms affecting the Power+ inverter are shown with a grey background. Alarm code Description Remarks A001 B1 probe alarm A002 B2 probe alarm A003 B3 probe alarm A004 B4 probe alarm...
  • Page 29 TM_i-BX(-N)_NC05_00_06_20_EN Alarm code Description Remarks A139 Power+ device offline Relating to the Power+ inverter A140 Power+ alarm Relating to the Power+ inverter (**) see alarm code table A141 Default Power+ configuration not installed Relating to the Power+ inverter (notification only, no logging) Power+ inverter alarms appear on the mask with the indication of the driver and the alarm description.
  • Page 30 TM_i-BX(-N)_NC05_00_06_20_EN Alarm code Description NOTES uS hw overheating uS data communication uS compressor stall uS bus dc overcurrent uS hwf bus dc curr. uS bus dc volt uS hwf bus dc volt uS input volt uS hwf input volt uS bus dc power supply uS hwf no power supply uS ntc overtemp.

  • Page 31: Function Description

    Parameter 0202 is only available for i-BX-N units. With i-BX-N units with DHW enabled it is possible to set the system / DHW priority using parameter 0014 (default value = DHW). It will be possible to set the machine operating modes using the menu or the digital input (the operating mode type selection is possible using parameter 0100: “BY KEYBOARD”...

  • Page 32: Setpoint Regulators

    SETPOINT REGULATORS i-BX-N units will be able to regulate system water production in a “traditional” manner - which means on the basis of a fixed setpoint that can be set by the user -, or in an “advanced” manner - based on a dynamic setpoint calculated through climatic curve managed functions -, both as far as cold and hot, as described below.

  • Page 33: Cold Offset

    TM_i-BX(-N)_NC05_00_06_20_EN Ambient offset Ref. curve 1.0 DT(Tamb-setP)°C The delivery setpoint may be compensated by the offset between the desired setpoint and the temperature of an ambient used as reference. The correction through the compensation may be “measured” based on an “ambient authority” coefficient (parameter 0164) that establishes the extent of the correction.

  • Page 34: Anti-Condensation Function

    TM_i-BX(-N)_NC05_00_06_20_EN ANTI-CONDENSATION FUNCTION The management of this function requires the zone N-THC thermostat. When the system is set to cooling, excessive ambient humidity may cause the formation of condensation. This can be counteracted by increasing the delivery water temperature proportionally with the humidity increase detected in the environment (see the following chart).

  • Page 35: Compressor Regulation

    BLDC COMPRESSOR START-UP PROCEDURE i-BX and i-BX-N units use BLDC inverter compressors and POWER+ CAREL PSD1 or PSD2 drivers. At start-up, the compressor is brought to rotation at the start-up speed (start-up speed as indicated by parameter 138G). This speed is maintained irrespective of the regulation request for the whole duration of the minimum start-up time (parameter 1351).

  • Page 36: Compressor Operating Limit Protection

    TM_i-BX(-N)_NC05_00_06_20_EN 4.4.3 COMPRESSOR OPERATING LIMIT PROTECTION There is a control of the compressor operating limits (hereinafter envelope). In order to prevent the compressor from working outside the safety limits set by the manufacturer, this control cannot be disabled. Therefore, all unit compressors include the envelope data. Below are the working zones of a generic envelope: Zone Description...

  • Page 37: High Compression Ratio Prevention (Zone 2)

    TM_i-BX(-N)_NC05_00_06_20_EN Below are the various preventive actions relating to the operating limits; action 1 refers to the control action (before leaving the envelope); action 2 is the limit action (operating point outside the envelope). CAUTION: DO NOT CHANGE THESE PARAMETERS. THESE ARE MACHINE CONSTRUCTION PARAMETERS.

  • Page 38: Low Differential Pressure Prevention (Zone 7)

    TM_i-BX(-N)_NC05_00_06_20_EN 4.4.3.6 Low differential pressure prevention (zone 7) Device Description Compressor Decrease of the power decrease speed Power increase Variable MOP 4.4.3.7 Low condensation pressure prevention (zone 8) Device Description Compressor Decrease of the power decrease speed Power increase 4.4.3.8 Low evaporation pressure prevention (zone 9) Device Description...

  • Page 39: Maximum Compressor Speed As A Function Of The External Temperature

    TM_i-BX(-N)_NC05_00_06_20_EN MAXIMUM COMPRESSOR SPEED AS A FUNCTION OF THE EXTERNAL TEMPERATURE The maximum compressor speed can be set differently based on the external air temperature, within 2 limits that can be set using parameters 133X “Ext.temperature high threshold:” and 133Y “Ext.temperature low threshold:”, as follows: - if External air T <...

  • Page 40: Electronic Expansion Valve

    Other parameters: 1386 pre-opening in chiller 136U pre-opening in heat pump With 136T = NO valve pre-opening is based on the requested capacity. On i-BX-N units always set 136T = YES 4.8.2 EQUALIZATIONS AT START-UP Parameter 131K is used to set the type of valve pre-opening before the start of the compressor in compressor startup conditions with pressure difference defined by parameter 1358 not being met.

  • Page 41: Fan

    CONDENSATION CONTROL As far as condensation control, i-BX(-N) units have double fan management, in Cooling Mode for i-BX units and in chiller operation for i-BX-N units. In addition to fan regulation based on the condensation pressure, in chiller operation it is also possible to have regulation based on the external temperature (alternative to pressure regulation).

  • Page 42: Regulation Based On The External Temperature Up To Version Nc04.00 Relc40 (Not On Three-Phase I-Bx-N Units)

    TM_i-BX(-N)_NC05_00_06_20_EN 4.9.2.2 Regulation based on the external temperature up to version NC04.00 relC40 (not on three-phase i-BX-N units). Speed [%] 1409 1409 100% High Speed (131T) Min Speed (131R) external T [°C] 1407 1408 4.9.2.3 Regulation based on the external temperature starting from version NC04.00 relC50...

  • Page 43: Unit Pump Management

    TM_i-BX(-N)_NC05_00_06_20_EN 4.10 UNIT PUMP MANAGEMENT 4.10.1 GENERAL Using the parameter it will be possible to set the desired mode of operation for the system pump, such as continuous operation or sniffer - parameter 0143 “Plant function mode”. 4.10.2 PUMP IN CONTINUOUS OPERATION If continuous operation mode is selected - parameter 0143 = ALWAYS ON -, when the machine is set to “Cool”...

  • Page 44: Electric Heater At The Delivery

    TM_i-BX(-N)_NC05_00_06_20_EN 4.11 ELECTRIC HEATER AT THE DELIVERY The purpose of the delivery electric heater is to assist in the production of hot water produced using the heat pump (compressor), when this is not able to meet the heat demand as a result of an inhibition (operation in replacement mode; in this case it will come on instead of the compressor), or when the heat load exceeds the power that can be produced by the machine (operation in integration mode;...
  • Page 45 TM_i-BX(-N)_NC05_00_06_20_EN Delivery heater Delivery heater disable hysteresis (0305) Enable Disable Delivery heater External air T (B4) [°C ] enable external T (0304) Once enabled, it’s activated based on the water temperature, in line with the following chart. Heat pump regulation setpoint (0507 x 0309) Heat pump regulation hysteresis x multiplication factor...

  • Page 46: Antifreeze Heater

    TM_i-BX(-N)_NC05_00_06_20_EN 4.11.3 ANTIFREEZE HEATER With antifreeze enable parameter 0310 = ON, the heater will switch on following the criteria described in the “Exchanger antifreezee” paragraph. The heater is inhibited if the “Demand limit” contact is active (see the “DEMAND LIMIT” paragraph) 4.11.4 DEFROST HEATER With defrost enable parameter 0302 = ON, during the defrost cycle the heater switches on following the heat setpoint and adjusting as described in...

  • Page 47: Integration Heat Source

    TM_i-BX(-N)_NC05_00_06_20_EN 4.12.2 INTEGRATION HEAT SOURCE Refer to the “Integration heater” paragraph, replacing the heater parameters as follows: 010G → 010H 0303 → 0306 0304 → 0307 0305 → 0308 0616 → 0618 0617 → 0619 Exceptions: a) the regulation hysteresis only consists of the value set in parameter 0507 (parameter 0309 is not considered); b) the alternative heat source is never used for the DHW load.

  • Page 48: Antifreeze Protection

    TM_i-BX(-N)_NC05_00_06_20_EN 4.13 ANTIFREEZE PROTECTION It will be possible to activate different types of antifreeze protections, the regulation of which may occur on the basis of the water or air temperature: - exchanger antifreeze; - system primary circuit antifreeze; - system secondary circuit antifreeze; - room antifreeze;...

  • Page 49: System Primary Circuit Antifreeze

    TM_i-BX(-N)_NC05_00_06_20_EN 4.13.2 SYSTEM PRIMARY CIRCUIT ANTIFREEZE Protection is related to the value read by probe B4 (external air temperature (Machine)) The interested resource is the system primary pump (Machine) - NO5 - This function can be enabled by setting parameter 0149 = YES and has the purpose of protecting the piping from the unit to the system primary circuit from ice.

  • Page 50: Room Temperature Antifreeze (Only With Zones Active)

    TM_i-BX(-N)_NC05_00_06_20_EN System primary circuit antifreeze” paragraph. 4.13.4 ROOM TEMPERATURE ANTIFREEZE (ONLY WITH ZONES ACTIVE) Protection is related to the value read by the room air temperature probe N-THC. The involved resources are the compressor (J10) and the delivery heater (NO8) The purpose of this function is to protect the internal ambient from excessive cold.

  • Page 51: Dhw Storage Tank Antifreeze

    TM_i-BX(-N)_NC05_00_06_20_EN 4.13.5 DHW STORAGE TANK ANTIFREEZE Protection is related to the value read by the DHW storage tank temperature probe (B3) The involved resource is the DHW storage tank heater (NO10). This function can be enabled by setting parameter 0228 = YES, and has the purpose of protecting the DHW storage tank from the formation of ice, by activating the corresponding immersion heater when the water temperature falls to a certain value, which can be set using parameter 0229.
  • Page 52 TM_i-BX(-N)_NC05_00_06_20_EN The “PRESSURE 2” type defrost follows the logic below: Revolution [rps] Asynchronous drive Synchronous drive Defrost (Max. 10 min) Asynchronous drive Max or less Synchronous drive Max. 10rps/sec Time 30 sec 2 sec or more 30 sec 2 sec or more Changing a reversing valve 134G 134I...

  • Page 53: Heat Pump Inhibitions

    TM_i-BX(-N)_NC05_00_06_20_EN 4.15 HEAT PUMP INHIBITIONS The following inhibitions are set for the protection of the heat pump: operation outside envelope based on the external air temperature The individual functions are described below. 4.15.1 OPERATION OUTSIDE ENVELOPE See the paragraph dedicated to the Power+ driver. 4.15.2 EXTERNAL AIR TEMPERATURE The purpose of this function is to protect the machine, preventing the operation of the compressor in heating or cooling mode when the external air...

  • Page 54: External Air Temperature And Water Temperature

    TM_i-BX(-N)_NC05_00_06_20_EN 4.15.3 EXTERNAL AIR TEMPERATURE AND WATER TEMPERATURE The heat pump is inhibited (compressor startup inhibition) when the water temperature reaches the maximum value set through parameter 0636 near the air temperature set using parameter 133E. This value will change dynamically (according to the band set with parameter 133H), decreasing in proportion to the decrease of the external air temperature (differential set with parameter 133F), in accordance with the function described below.

  • Page 55: Demand Limit

    TM_i-BX(-N)_NC05_00_06_20_EN 4.16 DEMAND LIMIT This function can be activated using the DI8 digital input when parameter 019C = DEMAND LIMIT. Its purpose is to inhibit the operation of the heat pump and the delivery heaters (if present), due to them being electric loads. This is to avoid electric line overload, for example if the switching on of other loads with higher priority than the heat pump is required.

  • Page 56: Night Function

    TM_i-BX(-N)_NC05_00_06_20_EN 4.19 NIGHT FUNCTION The function can be activated from a remote contact and can be used to decrease the unit noise by adjusting the number of revolutions of the inverter compressor. It is also possible to enable interruption of the function when the adjustment temperature deviates from the setpoint of a certain differential. The function is restored when the adjustment temperature drops by an offset value.

  • Page 57: Management Of Domestic Hot Water (Dhw)

    TM_i-BX(-N)_NC05_00_06_20_EN MANAGEMENT OF DOMESTIC HOT WATER (DHW) MANAGEMENT OF THE DHW 3-WAY VALVE The DHW 3-way valve is used in systems producing domestic hot water for storage in a storage tank. It’s used to divert the water flow from the system to the DHW storage tank. The resources (pump, compressor and 3-way valve) must be coordinated, so that during the switching on phase system water is not sent to the domestic hot water storage tank, in order to avoid cooling it down, as this water is normally colder (particularly during the summer time - system cool -) than the water already stored, and also to avoid to send stored domestic hot water to the system, when switching from DHW to system.

  • Page 58: Dhw Storage Tank Management

    TM_i-BX(-N)_NC05_00_06_20_EN DHW STORAGE TANK MANAGEMENT The heating of the storage tank will be possible thanks to the heat pump and the DHW storage tank heater. The setpoints on which the regulation will take place will be: - 0023 comfort setpoint, setting parameter 0015 = COMFORT (typically used during the day, when time band control is set); - 0022 economy setpoint, setting parameter 0015 = ECONOMY (typically used during the night, when time band control is set) - 0209 overboost setpoint, a value that allows to load the storage tank at a temperature higher than the current setpoint, comfort or economy;...

  • Page 59: Dhw Storage Tank Heater Only

    TM_i-BX(-N)_NC05_00_06_20_EN Compressor MaxSet instant T Banda proporzionale DHW (0513) DHW setpoint (0022 or 0023) DHW proportional band (P 0513) MaxSet instant T = the stor age tank temperature at which HP inhibition has trigger ed DHW storage tank T [°C] Whenever the unit stops producing DHW, it becomes available for the production of system water.

  • Page 60: Hp + Dhw Storage Heater (P0202=3) Or Delivery Heater (P0202=1 And P0300=1)

    TM_i-BX(-N)_NC05_00_06_20_EN 5.2.3 HP + DHW STORAGE HEATER (P0202=3) OR DELIVERY HEATER (P0202=1 AND P0300=1) The heat pump will work as described in paragraph “Heat pump only”, with the following differences: case a) (ref. paragraph “Heat pump only”) once the DHW setpoint has been reached (0022, 0023) the DHW heater comes on with a fixed delay of 30s, following the overboost setpoint (0209).
  • Page 61 TM_i-BX(-N)_NC05_00_06_20_EN case b) (ref. paragraph “Heat pump only”) no “MaxSet” message and if installed the DHW heater will turn on following the overboost setpoint. Otherwise - only for 3-way DHW units - the delivery heater will come on, following the DHW setpoint (ECONOMY or COMFORT setpoint) Meaning that with 0202 = 1 and 0300 = 1 (only Heat pump + Delivery heater), in case of heat pump inhibition the delivery heater will be used to satisfy the DHW setpoint.

  • Page 62: Low Energy Tariff

    TM_i-BX(-N)_NC05_00_06_20_EN LOW ENERGY TARIFF This function can be activated from the digital input (command normally given by the electricity meter) and forces the loading of the DHW storage tank during time bands when the electricity tariff is reduced. When the contact is active, the DHW setpoint is forced to the “comfort setpoint (parameter 0023) even if the setpoint set by the user would impose “economy setpoint”...

  • Page 63: Hardware

    TM_i-BX(-N)_NC05_00_06_20_EN HARDWARE The controller hardware consists of a μPC medium cod. C51100048E (UPCA001DM0) with the following characteristics: uPC MEDIUM UPCA001DM0 CAREL FLASH BIOS memory + application SW: 4MB Revision 1.212 Power input: 230VAC Integrated expansion valve driver: Yes μPC medium I/O characteristics and arrangement: Legend: 1 Connector for terminal and application discharge 2 Connector for application discharge...

  • Page 64: Hardware Architecture

    TM_i-BX(-N)_NC05_00_06_20_EN HARDWARE ARCHITECTURE The pLDPRO or PGD1 machine terminal is connected to the telephone cable (pLan protocol). TH-tune devices are used as system thermostats (accessories) and communicate with the Modbus protocol controller. ADDRESSING OF THE MODBUS MASTER COMMUNICATION MODULES Each device connected to the controller via the Modbus Master protocol must have a univocal Modbus address. The addresses that must have the devices connected to the Modbus network are listed below, together with the methods for changing address with respect the one initially set by the supplier.

  • Page 65: Input / Output Configuration Table

    AIR / WATER INVERTER UNIT WITH DHW MANAGEMENT (WITH 3-WAY VALVE) This section defines the I/O used with the controller configured for the management of inverter air / water units, with production of domestic hot water, with 3-way valve (i-BX-N family). pCO size...
  • Page 66 1) NO11 - Dehumidifier (**) The ID7 digital input of i-BX-N units can take two different - Summer / Winter configurations. The first is the selection of system+DHW (operating in - DHW recirculation conjunction with input ID6) operating mode, or alternatively the input can...

  • Page 67: I-Bx Chiller Only Non-Reversible Inverter Air/Water Units

    TM_i-BX(-N)_NC05_00_06_20_EN I-BX CHILLER ONLY NON-REVERSIBLE INVERTER AIR/WATER UNITS Chiller only i-BX units have the following parameter values: 130Z Reversible = NO 130X Unit only Chiller or HP = Only chiller pCO size Medium Thermostatic valve Electronic Compressors Analogue Inputs Analogue Outputs Connector Type Description...

  • Page 68: Annexes

    TM_i-BX(-N)_NC05_00_06_20_EN ANNEXES PID REGULATION The Nadisystem software includes the PID regulator, which allows the regulation of the inverter compressor. The graph below shows the operating logic of a PID control: ) (t    Setpoint Error Process Output This type of control involves three types of action: •...

  • Page 69: Derivative Action

    TM_i-BX(-N)_NC05_00_06_20_EN This action is defined using the integral constant Ki (also known as integral gain) calculated with this formula: �� �� �� �� �� �� Ti is the value of the integral time defined by one of the following parameters: •...

  • Page 70: Psd2 Power+ Inverter Use

    TM_i-BX(-N)_NC05_00_06_20_EN PSD2 POWER+ INVERTER USE The PSD2 Power+ driver requires the setting at the factory of its operating parameters and the setting of the “safety parameters”. For information purposes only, below are the safety parameters of the compressors used across the i-BX(-N) range SNB110FGYMT 1200 SNB130FGBMT...
  • Page 71 TM_i-BX(-N)_NC05_00_06_20_EN MEHITS S.p.A. ● TECHNICAL MANUAL Version NC05 - Translation of the Original Instructions...
  • Page 72 Via Caduti di Cefalonia, 1 • 36061 Bassano del Grappa (VI) • Italy Ph. (+39) 0424 509500 www.melcohit.com Version NC05 MEHITS S.p.A. ● TECHNICAL MANUAL...

This manual is also suitable for:

I-bx

Table of Contents