HIdRos LZTi Series Technical Manual
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HIdRos LZTi Series Technical Manual

Heat pumps air/water dc inverter compressor with vapor injection (evi)
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HEAT PUMPS AIR/WATER DC INVERTER COMPRESSOR
WITH VAPOR INJECTION (EVI)
LZTi
SERIES
-20°C
+65°C
E.V.I.
Vtee
TECHNICAL MANUAL
Multiple instructions:
the instructions before
the unit
Rev. C 08-2021

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  • Page 1 HEAT PUMPS AIR/WATER DC INVERTER COMPRESSOR WITH VAPOR INJECTION (EVI) LZTi SERIES -20°C +65°C E.V.I. Vtee TECHNICAL MANUAL Multiple instructions: the instructions before the unit Rev. C 08-2021...
  • Page 2 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) Declaration of conformity MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...

  • Page 3: Table Of Contents

    4.4 Inspection ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 5. UNIT START UP ...................................... MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 4 ..................................6.6 CIRC ................................................................................................... 7. UNIT MAINTENANCE .................................................................... 7.2 Access to the unit ............................................................................................................................8. DECOMMISSIONING ..................................................................................................................................................................................................................MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...

  • Page 5: Introduction

    1.1 Preliminary information these instructions. 1.2 Aim and content of the manual instructions. 1.3 How to store this manual user. 1.4 Manual Update 1.5 How to use this manual MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 6 METHOD OF INJURY PRECAUTIONS RISK Burns. severe burns. Burns. unit enclosure severe burns. unit. severe burns. severe burns. unit enclosure severe burns. severe burns. open. Entire unit Entire unit Entire unit MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 7 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) 1.7 General Description of Symbols Used BANNED WARNING ACTION REQUIRED MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 8 1.8 Safety symbols used GENERAL RISK ELECTRICAL HAZARD MOVING PARTS HOT SURFACES SHARP SURFACES EARTH CONNECTION READ AND UNDERSTAND THE INSTRUCTIONS RECOVER OR RECYCLE MATERIAL 1.9 Limitations and prohibited use MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 9 Temperatura di progetto Design temperature Design temperature Peso a vuoto Weight Contiene gas fluorurati ad effetto serra disciplinati dal protocollo di Kyoto Contains fluorinated greenhouse gasses covered by the Kyoto protocol MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...

  • Page 10: Safety

    2.1 Warning re potentially hazardous toxic substances • • ENVIRONMENTAL PROTECTION : 2.1.3 Persistence and degradation 2000. 2.1.4 Effects of discharges 2.1.5 Exposure controls and personal protection 2.1.6 Professional exposure limits R410A 2.2 Refrigerant handling MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 11 2.5.1 Inhalation sphere. 2.5.2 Contact with skin 2.5.3 Contact with eyes 2.5.4 Ingestion 2.6 First Aid Measures 2.6.1 Inhalation 2.6.2 Contact with skin 2.6.3 Contact with eyes 2.6.4 Ingestion MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 12 Heat pumps air/water DC inverter compressor with vapor injection (EVI) 2.6.5 Further medical treatment 3. TECHNICAL CHARACTERISTICS 3.1 Unit description 3.1.1 Frame 3.1.2 Noise Reduction 3.1.3 Refrigerant circuit 3.1.4 Compressors 3.1.5 Source heat exchanger MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 13 3.1.10 Control and protection devices 3.3.11 Condensate discharge drip tray with antifreeze heater (BRCA) 3.3.12 Electronic expansion valve (VTEE) 3.3.13 Electronic soft starter (DSSE) 3.3.14 Control panel remotabile (PCRL) MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...

  • Page 14: Other Versions

    3.2.2 Units with integrated hydraulic kit, pump no tank (E1NT) 3.3 Accessories description 3.3.2 Rubber vibration dampers (KAVG) 3.3.3 Antifreeze heater (RAEV) This 3.3.4 Antifreeze kit (RAES) This 3.3.9 RS485 serial interface card modbus protocol (INSE) MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 15 +i Pm+i Water production at 40°C Water production at 40°C C.O.P. Water production at 55°C Water production at 55°C Ambient temperature (°C) Max Water Temperature (°C) Ambient temperature (°C) MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 16 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) 3.5 Technical data LZTi - LZTi/SW6 n° n° 2088 2088 2088 2088 on the unit. MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 17 3.5.2 User water pump available static pressure (Option) 3.5.1 User and domestic heat exchanger water pressure drops 3.6 Operation limits - 20 - 10 Ambient temperature(°C) 3.6.2 User hot water temperature (winter operation) MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 18 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) 3.6.3 Cold water temperature (summer operation) 3.6.4 Ambient air temperature MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 19 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) 3.7 Domestic hot water production 3.7.1 Solution 1 MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 20 This is the solution for existing buildings or for those applications where it is not possible to remove existing plants. possibility of using the existing DHW tank. COLD WATER in the tank. AS MUCH AS POSSIBLE MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 21 3.8.3 Correction tables different Fouling factors Fouling factor 0.00005 0.0001 0.0002 CCCP 0.98 0.94 IPCF 0.98 0.95 CCCP = Cooling capacity correction factor IPCF = Input power correction factor MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 22 LZTi10_f9 LZTi20_f1 LZTi20_f2 LZTi20_f3 LZTi20_f4 LZTi20_f5 LZTi20_f6 LZTi20_f7 LZTi20_f8 LZTi20_f9 Lw: Sound power level according to ISO 9614. 4. INSTALLATION 4.1 General safety guidelines and and use of symbols MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...

  • Page 23: Inspection

    LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) tion. 4.2 Health and safety Considerations 4.3 Personal protective equipment 4.4 Inspection MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 24 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) In Case of Damage 4.5 Storage 4.5.1 Shipment 4.6 Unpacking 4.7 Lifting and handling MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 25 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) 4.8 Location and minimum technical clearances Mod. 08- 10 2000 15 - 20 2500 MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 26 Heat pumps air/water DC inverter compressor with vapor injection (EVI) 4.9 Installation of rubber vibration dampers (KAVG) 4 hole Ø E Mod. LZTi 08 - 10 LZTi 15 - 20 4.10 Serial interface card RS485 (INSE) Supervision MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 27 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) 4.11 Installation of condensate drip tray (BRCA) 4.11.1 Installation of the heating cable MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 28 Heating mode: Cooling mode: 4.13 Chemical characteristics of the water Total Hardness Electric conductibility Sulphur ion None Chlorine ions Ammonia ion None Sulphuric acid ions Silicon ion Total Iron MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 29 LZTi/E1NT/SW6 LZTi/SW6 OUT SW6 OUT SW6 IN SW6 IN SW6 4.15 User circuit minimum water content Model Minimum water content winter mode (l) Minimum water content summer mode (l) MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 30 The above values do not guarantee the availability and temperature of domestic hot water 4.17 Filling the hydraulic circuit • • • • • 4.18 Emptying the installation • • • MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 31 4.19 Typical installations 4.19.1 Combined heating / Cooling / Domestic hot water production – 2 pipe system The plant components supplied by the company are: STANDARD OPTIONS NOT AVAILABLE MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 32 Heat pumps air/water DC inverter compressor with vapor injection (EVI) 4.19.2 Combined heating / Cooling / Domestic hot water production – 4 pipe system The plant components supplied by the company are: STANDARD OPTIONS NOT AVAILABLE MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 33 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) 4.20 Electric connections: preliminary safety information FROST PROTECTION MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 34 Heat pumps air/water DC inverter compressor with vapor injection (EVI) 4.21 Electric data Model Power supply Control board Auxiliary circuit Fans power supply Line section PE section present in the units. MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 35 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) 4.22 Electric connections 4.22.1 Power supply and electrical connections 4.22.2 Extraction of the control and possibile remoting. MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 36 DOMESTIC HOT WATER CIRCUIT PUMP 4.22.4 Remote wiring connections (optional) 3 WAY ON/OFF VALVE(Only required on 2 pipes systems versions); Not required on / SW6 versions) REMOTE ON / OFF MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 37 REMOTE CONTROL PANEL WHITE DOMESTIC HOT WATER CIRCUIT FLOW SWITCH (SW6 versions only) USER CIRCUIT ELECTRIC INTEGRATION HEATERS DOMESTIC HOT WATER ELECTRIC INTEGRATION HEATERS PRIORITY SELECTOR (Hot water) HEATING CABLE MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 38 USER CIRCUIT WATER OUTLET SENSOR (BTO) DOMESTIC HOT WATER OUTLET SENSOR (BTU) USER CIRCUIT FLOW SWITCH (SFW1) 4.23 Positioning of the user circuit water inlet sensor (BTI) Correct positioning of the BTI sensor MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 39 SHP GHP Ø SC Ø DC Ø SC Ø SC Ø SC Ø 6 Ø L Ø 12 Ø L Ø L YBPR Ø H Ø H A1 NT MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 40 SHP GHP Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø YBPS Ø YTUT Ø YTSO YBPR Ø Ø Ø A1 NT YBPR YBPS YTSO YTUT MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...

  • Page 41: Unit Start Up

    Heat pumps air/water DC inverter compressor with vapor injection (EVI) 5. UNIT START UP 5.1 Preliminary checks 5.1.1 Before start-up • • • • • • • • • • • • • MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 42 Reset ----- °C ----- °C ----- ----- ----- °C ----- °C support. 5.1.3 Controls during unit operation • • • 5.1.4 Refrigerant charge checking • • • • • MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 43 Indicates that an alarm is active. Domestic hot water. Flashing: defrosting start countdown; Economy function Fixed: defrosting active Unloading function (not available). 5.2.2 Key function PROBES ALARM SERVICE CIRC MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 44 5.3.1 Remote keyboard connection (VGI890) ENTER Rosso / Red Nero / Black Nero / Black Bianco / White Bianco / White Rosso / Red • • 5.3.2 Panel mounting connection diagram MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...

  • Page 45: Use

    5.3.3 Wall mounting connection diagram 6. USE 6.1 Switch the unit on Unit 6.1.1 Switch the unit on from the keyboard Cooling mode Heating mode Domestic hot water mode MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...

  • Page 46: Stop

    Unit ON: Heating 00:00 01/01/2014 Evaporator inlet temperature 28.4 °C Evaporator outlet temperature °C 27.0 External air temp. (FC) °C 31.8 San. water temperature N.C. PROBES ALARM SERVICE CIRC. MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 47 External air temp. (FC) °C San. water temperature 50.0 °C PROBES ALARM SERVICE CIRC. ALARM EXIT press EXIT Press 6.3.1 Adjustable parameters Function Adjustment limit Default value 35°C 50°C 23°C 10°C MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 48 30.0 High pressure circuit 1 (pressostat) Evaporator outlet temperature °C 35.0 External air temp. (FC) °C San. water temperature 50.0 °C PROBES ALARM SERVICE CIRC. RST ALL RESET EXIT MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...

  • Page 49: Circ

    PROBES ALARM SERVICE CIRC. Circuits status Circuits status Circuits status Circuits status Condenser fan Compressors status Unloading status Evaporating-condensing probe Evaporating pump status ALARM ENTER EXIT ALARM ENTER EXIT MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 50 N.C. 255 % Circuit Circuit 2 2 ALARM EXIT ALARM EXIT Condenser fan Condenser fan Cond. Cond. fan 1 fan 1 Cond. Cond. fan fan 2 2 ALARM EXIT MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 51 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) 6.7 SERVICE key ENTER EXIT ENTER EXIT Press the SERVICE Press ENTER Press the EXIT MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 52 1st level password (Pr1) ALARM EXIT 1st level password (Pr1) 1st level password (Pr1) Password OK! Press ENTER to continue ALARM ENTER EXIT Press ENTER Code Meaning Code Meaning Set point Defrost MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 53 Parameter group selection Sd01 °C Sd02 10.0 °C Sd03 °C Sd04 20.0 °C Dynamic set point Dynamic set point ALARM ENTER EXIT ALARM EXIT Sd05 °C Sd06 -25.0 °C ALARM EXIT MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 54 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) Weather compensated function of 10°C. MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 55 Disabled Time band n°2 Time band n°2 Tuesday Tuesday 00:00 00:00 00:00 00:00 Disabled Disabled Disabled Disabled Time band n°3 Time band n°3 Wednesday Wednesday ALARM EXIT ALARM EXIT MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 56 Water pumps Water pumps Hour Reset Evaporator water pump Sanitary water pump ALARM RESET EXIT 6.7.5 Circuit maintenance ENTER ENB/DIS Circuits Circuits Circuit 1 enabled Circuit 2 ALARM ENB/DIS EXIT MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 57 Defrost status Defrost status Circuit 1 Circuit 1 cycle not in progress cycle not in progress 45 : 0 Time to start (mm:ss) Circuit 2 Circuit 2 ALARM ENTER EXIT MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 58 Heaters Liquid solenoid valves Liquid solenoid valves ALARM EXIT 6.7.10 I/O Status (Input/Output) ENTER I/O Status I/O Status Analog input Analog output Digital input Digital output ALARM ENTER EXIT MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 59 Prop. Output AUX 1 110.0 °C Analog output 1 winter set point Analog output 1 winter set point -30.0 °C Output % Output % ALARM ENTER EXIT ALARM EXIT MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 60 Upload from device to HotKey ALARM ENTER EXIT 6.7.15 Control panel ENTER Control panel Control panel Contrast & backlight Languge selection System information ALARM ENTER EXIT 6.6 Acoustic signal silencing MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...

  • Page 61: Unit Maintenance

    LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) 7. MAINTENANCE OF THE UNIT 7.1 General warnings • • • 7.2 Drive access MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 62 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) 7.3 Scheduled maintenance Search for leaks CASE Visual Inspection Pressure Test 7.4 Periodical checks MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 63 7.4.1 Electrical system and adjustment Frequency Action to be performed As neces- 7.4.2 Condensing coils and fans Frequency Action to be performed As neces- present every three months or more MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 64 Heat pumps air/water DC inverter compressor with vapor injection (EVI) 7.4.3 Compressors Frequency Action to be performed As neces- service. 7.5 Refrigerant circuit repair Therefore: • • • • • • MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...

  • Page 65: Decommissioning

    Heat pumps air/water DC inverter compressor with vapor injection (EVI) 8. DECOMMISSIONING 8.1 Disconnect the unit • • • • • 8.2 Disposal, recovery and recycling 8.3 RAEE Directive (only UE) MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 66 Heat pumps air/water DC inverter compressor with vapor injection (EVI) 9. DIAGNOSIS AND TROUBLESHOOTING Code Alarm Description Cause Solution ACF1 ACF2 ACF3 ACF4 ACF5 ACF6 ACF7 ACF8 ACF9 AEFL AEUn AHFL sensor AP10 sensor sensor sensor MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 67 Heat pumps air/water DC inverter compressor with vapor injection (EVI) Code Alarm Description Cause Solution sensor. AtE1 AtE2 Restore the correct user circuit B1 HP b1AC b1AH b1dF b1hP circuit 1 B1LP b1lP circuit 1 b1tF C1tr C2tr MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 68 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) 10.DIMENSIONAL DRAWINGS Dimensional drawings LZTi 08 - 10 MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 69 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) Dimensional drawings LZTi 15 - 20 MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 70 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 71 LZTi Heat pumps air/water DC inverter compressor with vapor injection (EVI) MTEC.6110.GB-C-1 Operation and maintenance manual LZTi series English Rev. C 08-2021...
  • Page 72 HIDROS Srl...

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