HIdRos LZT Series Technical Manual
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HIdRos LZT Series Technical Manual

High efficiency air to water heat pumps
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HIGH EFFICIENCY AIR TO WATER HEAT PUMPS
LZT
SERIES
TECHNICAL MANUAL

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Summary of Contents for HIdRos LZT Series

  • Page 1 HIGH EFFICIENCY AIR TO WATER HEAT PUMPS SERIES TECHNICAL MANUAL...
  • Page 2 High efficiency air to water heat pumps MTLZTGB REV.012008...
  • Page 3 DICHIARAZIONE DI CONFORMITA' 1370 DECLARATION DE CONFORMITE DECLARATION OF CONFORMITY Organismo notificato / Organisme notifié KONFORMITÄTSERKLÄRUNG Via dell'Industria, 5 Notified body/Meldestelle/Anmält organ: FÖRSÄKRAN OM ÖVERENSSTÄMMELSE Bureau Veritas Italia Spa 35020 Brugine PD Italy V.le Monza,261 - 20126 MILANO Macchina Modello / Unité Modéle / UNIT Model Matricola / Matricule / Serial no.
  • Page 4 Moduli di valutazione di conformità alla direttiva 97/23 utilizzati per i componenti Formulaires de évaluation de conformité avec la directive 97/23 CEE utilisés pour les composantes Procedures in compliance with 97/23 CEE directive to be used for the components Konformitätprozedur nach der Richtlinie 97/23 CEE für die bauteile Metod i överrenstämmande med 97/23 CEE standard som används för komponenter Componente / Composant / Component / Bauteil / Komponent Modulo/Proced./Proced./Prozed./Metod...
  • Page 5 High efficiency air to water heat pumps INDEX Declaration of conformity page3 Aim and contents of this manual page 6 How to keep this manual page 6 Graphic symbols page 6 Safety laws page 7 General safety guidelines page 7 Workers’...
  • Page 6 The customer shall store any updated copy of the manual or parts of it delivered by the manufacturer as an attachment to this manual. HIDROS SRL is available to give any detailed information about this manual and to give information regarding the use and the maintenance of its own units.

  • Page 7: Safety Laws

    High efficiency air to water heat pumps SAFETY LAWS HIDROS SRL’s equipment and their component parts have been designed in compliance with the harmonised EC norms in force and other European and national norms as required by the Council Directive (98/37 and later amendments).

  • Page 8: Workers' Health And Safety

    High efficiency air to water heat pumps WORKERS’ HEALTH AND SAFETY The European Community has adopted a number of directives on workplace health and safety, which include directives 89/391/CEE, 89/686/CEE, 89/655/CEE, 86/188/CEE and 77/576/CEE. Every employer shall implement such provisions and ensure that workers respect them: Do not tamper with or replace parts of the equipment without the specific consent of the manufacturer.

  • Page 9: Technical Characteristics

    High efficiency air to water heat pumps TECHNICAL CHARACTERISTICS The high efficiency LZT heat pump series have been especially designed for application with radiant floor heating systems or in those applications where it is necessary to have the highest maximum efficiency in heating mode. The units have been optimized for heating mode, they are able to produce water up to 60°C and they can operate down to -15°C ambient temperature.

  • Page 10: Other Versions

    High efficiency air to water heat pumps Control and protection devices All units are supplied with the following control and protection devices: Return user water temperature sensor, antifreeze protection sensor installed on the user outlet water temperature, return and supply domestic hot water sensors (SW6 versions only), high pressure switch with manual reset, low pressure switch with automatic reset, high pressure safety valve, compressor thermal overload protection, fans thermal overload protection, pressure transducer (used to optimize the defrost cycle and the fan speed depending on the ambient conditions), flow switch.

  • Page 11: Technical Data

    High efficiency air to water heat pumps TECHNICAL DATA Mod. Refrigerant R407C R407C R407C R407C R407C R407C R407C R407C R407C Heating capacity 13,2 19,0 22,2 26,5 37,9 Heating capacity 13,4 18,6 22,1 26,8 37,2 Heating capacity 11,8 16,5 19,5 23,7 33,1 Compressors input power Domestic hot water capacity...
  • Page 12 High efficiency air to water heat pumps HEATING CAPACITY AND COMPRESSORS INPUT POWER PH kW) PA (kW) TAMB Mod. TWUC (°C) TWUC (°C) (°C) LZT 05 PH kW) PA (kW) TAMB Mod. TWUC (°C) TWUC (°C) (°C) LZT 07 10,1 PH kW) PA (kW) TAMB...
  • Page 13 High efficiency air to water heat pumps HEATING CAPACITY AND COMPRESSORS INPUT POWER PH kW) PA (kW) TAMB Mod. TWUC (°C) TWUC (°C) (°C) … … … … … … … … … 10,1 10,0 10,2 10,5 10,3 10,4 10,6 10,7 10,9 11,2 LZT 13 10,9 11,0 11,1 11,3 11,4 11,6 11,5 11,6 11,7 11,8 12,0 12,2...
  • Page 14 High efficiency air to water heat pumps HEATING CAPACITY AND COMPRESSORS INPUT POWER PH kW) PA (kW) TAMB Mod. TWUC (°C) TWUC (°C) (°C) 20,2 20,6 21,0 21,5 … … 9,1 10,1 … … … … 23,7 24,0 24,3 24,6 25,0 …...
  • Page 15 High efficiency air to water heat pumps COOLING CAPACITY AND COMPRESSORS INPUT POWER PA = Compressor input power Ambient temperature 45°C 40°C 35°C 30°C 25°C 20°C User water outlet temperature (°C) PF = Cooling capacity 25°C 30°C Ambient temperature 20°C 35°C 40°C 45°C...
  • Page 16 High efficiency air to water heat pumps USER HEAT EXCHANGER WATER PRESSURE DROPS 2000 3000 4000 5000 1000 1200 1400 1600 1800 2000 B: LZT 05 E: LZT 13 C: LZT 07 G: LZT 20 - 25 D: LZT 09 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 I: LZT 30 M: LZT40...
  • Page 17 High efficiency air to water heat pumps DOMESTIC HOT WATER HEAT EXCHANGER WATER PRESSURE DROPS 2000 3000 4000 5000 1000 1200 1400 1600 1800 2000 B: LZT 05 E: LZT 13 C: LZT 07 G: LZT 20 - 25 D: LZT 09 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 I: LZT 30 M: LZT40...
  • Page 18 High efficiency air to water heat pumps USER CIRCUIT WATER PUMPS AVAILABLE STATIC PRESSURE 2000 2500 3000 3500 4000 4500 1000 1200 1400 1600 1800 B: LZT 05 E: LZT 13 C: LZT 07 G: LZT 20 - 25 D: LZT 09 4000 5000 6000...

  • Page 19: Operation Limits

    User heat exchanger water flow rate The nominal water flow rate given by HIDROS is referred to a Dt of 5 °C. Maximum flow rate allowed is the one that presents a Dt of 3 °C: higher values may cause too high pressure drop. The minimum water flow rate allowed is the one presenting a Dt of 8 °C.

  • Page 20: Sound Data

    High efficiency air to water heat pumps CORRECTION TABLES Operation with glycol Glycol percentage (°C) IPCF WFCF PDCF Freezing point -3,2 0,985 1,02 1,08 -7,8 0,98 0,99 1,05 1,12 -14,1 0,97 0,98 1,09 1,22 -22,3 0,965 0,97 1,14 1,25 -33,8 0,955 0,965 1,33...

  • Page 21: Electric Data

    After receiving the unit, immediately check its integrity. The unit left the factory in perfect condition; any eventual damage must be questioned to the carrier and recorded on the Delivery Note before it is signed. HIDROS must be informed, within 8 days, of the extent of the damage.

  • Page 22: Location And Minimum Technical Clearances

    High efficiency air to water heat pumps LOCATION AND MINIMUM TECHNICAL CLEARANCES LZT units are designed for external installation: any cover over the unit and location near trees (even if they partially cover the unit) must be avoided in order to prevent air by-pass. It is advisable to create a proper basement, with a size similar to unit foot-print. Unit vibration level is very low: it is advisable however, to fit a rigid rubber band between basement and unit base-frame.
  • Page 23 High efficiency air to water heat pumps 1000 3000 1000 3000 1000 3000 INSTALLATION OF THE HOODS The sound attenuation hoods are supplied loose; they have to be mounted on the unit by Self-screwing screws M3,5 x 16 supplied in the installation kit.

  • Page 24: Hydraulic Connections

    High efficiency air to water heat pumps WARNING: The equipment should be installed so that maintenance and/or repair services be possible. The warranty does not cover costs due to lifting apparatus and platforms or other lifting systems required by the warranty interventions. WARNING: All the maintenance operation must be done by TRAINED PEOPLE only.
  • Page 25 High efficiency air to water heat pumps BASIC VERSION HYDRAULIC COMPONENTS “A” VERSION HYDRAULIC COMPONENTS System filling group Water pump Thermometer One way valve Evaporator Flexible connection Flow switch Ball shut-off valve Water strainer User Water tank Expansion vessel Water manometer Safety valve Domestic hot water accumulator Vent valve...
  • Page 26 High efficiency air to water heat pumps DOMESTIC HOT WATER HYDRAULIC CONNECTIONS (SW6 VERSIONS ONLY) MTLZTGB REV.012008...
  • Page 27 High efficiency air to water heat pumps LZT REFRIGERANT CIRCUIT LAYOUT ◊ Option Liquid receiver Return water sensor Compressor Flow switch Supply water sensor Charging plug High pressure switch Source heat exchanger Low pressure switch CNSW Domestic hot water heat exchanger Manual valve Economizer One way valve...
  • Page 28 High efficiency air to water heat pumps LZT/SW6 REFRIGERANT CIRCUIT LAYOUT The LZT/SW6 version is suitable to produce cold water, hot water for heating and domestic use. The unit is supplied with an additional heat exchanger used as condenser for the domestic hot water that, is produced independently from the operation mode of the unit.

  • Page 29: Electrical Connections

    High efficiency air to water heat pumps ELECTRICAL CONNECTIONS It must be verified that electric supply is corresponding to the unit electric nominal data (tension, phases, frequency) reported on the label in the front panel of the unit. Power connections must be made in accordance to the wiring diagram enclosed with the unit and in accordance to the norms in force.

  • Page 30: Maintenance And Periodic Checks

    High efficiency air to water heat pumps CONTROLS DURING UNIT OPERATION • Check the fans rotation. If the rotation is incorrect, disconnect the main switch and change over any two phases of the incoming main supply to reverse motor rotation (only for units with three-phase fan motors). •...

  • Page 31: Environment Protection

    High efficiency air to water heat pumps REFRIGERANT CIRCUIT REPAIR In the case that refrigerant circuit should be discharged, all the refrigerant must be recovered with proper machines. The system must be charged with nitrogen, using a gas bottle with a pressure reducing valve, until 15 bar pressure is reached. Any eventual leakage must be searched with a bubble leak finder.
  • Page 32 High efficiency air to water heat pumps Meaning Cause / Origin Reset Digital input active anti freeze Anti freeze alarm Manual proceed with manual reset. probe Digital input active for AL06 Automatic It turns to manual after 3 events in 1 Water flow alarm duration.
  • Page 40 Via dell’Industria 5 35020 Brugine (Pd) Tel.+390-49-9731022 Fax.+390-49-5806928 www.hidros.it Technical data shown in this booklet are not binding. HIDROS SRL shall have the right to introduce at any time whatever modifications necessary to the improvement of the product. MTLZTGB REV.012008...

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