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VOLTA W-S-6 Technical Manual

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VOLTA W-S-6
VOLTA W-L-6
TECHNICAL MANUAL
EN
MODEL:
SERVICE CONTACT:

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  • Page 1 VOLTA W-S-6 VOLTA W-L-6 TECHNICAL MANUAL MODEL: SERVICE CONTACT:...

  • Page 3: Table Of Contents

    Inside environment control..............................35 5.14. Remote control by BUS ................................ 36 5.15. Energy meter ..................................37 Start-up ....................................38 Technical specifications VOLTA-W-S| VOLTA-W-L ......................... 39 7.1. Component location ................................39 7.2. Power circuit diagram ................................45 7.3. VOLTA-W-S/L electrical connection tables ........................... 46 7.4.
  • Page 4 VOLTA-W-S/L technical manual Operation map ..................................49 Operation curves .................................. 51 10. Technical data table ................................54 11. Symbols ....................................57...

  • Page 5: General Information

    This may also be used to warn of unsafe practices. VOLTA-W-S/L heat pumps are designed to function within heating systems, cooling systems, for the production of domestic hot water (DHW), pool heating or other similar uses. The manufacturer is not responsible for any material damage and/or personal injury resulting from improper use or incorrect installation of the equipment.
  • Page 6 Refrigerant VOLTA Heat Pumps heat pumps may contain different types of refrigerant depending on the model. The refrigerants used by VOLTA Heat Pumps are not harmful to the environment as they do not contain chlorine and therefore do not contribute to the destruction of the ozone layer.
  • Page 7 In addition, everyone involved in maintenance work must be aware of the hazards associated with working with refrigerants. ▪ ollow the maintenance and service guidelines in this manual at all times. If in doubt, contact VOLTA Heat Pumps's technical department for assistance. ▪...
  • Page 8 If the problem cannot be corrected immediately, but it is nonetheless necessary to continue with the operation, a suitable temporary solution, agreed with VOLTA Heat Pumps's technical department, must be used. This must be reported to the owner of the equipment so that all parties can be informed.
  • Page 9 VOLTA-W-S/L technical manual Observe the following warnings during the recovery and charging processes: ▪ hen transferring refrigerant to recovery cylinders, make sure that only suitable refrigerant DANGER! recovery cylinders are used. Make sure that the correct number of cylinders are available to hold the total system charge.
  • Page 10 10 < µS/cm < 500 Table 1.3. Water property limits for production and brine circuits. The water used in the DHW tanks of the VOLTA-W-L must be filled with drinking water with a chloride concentration of less than 250mg/l. ▪...

  • Page 11: Disposal

    The heat pump contains refrigerant. VOLTA Heat Pumps uses refrigerants that are not harmful to the environment, but once their useful life cycle is over, the refrigerant must be recovered so that it can be recycled or disposed of in accordance with current regulations.

  • Page 12: Heat Pump Installation

    Due to its heavy weight, the heat pump should be handled by two workers using a forklift for heavy NOTE loads. 2.2. Dimensions and connections The overall dimensions and hydraulic connections of the VOLTA-W-L and VOLTA-W-S heat pumps are described below. Brine / Cooling Heating / Heat dump Captación / Refrigeración Calefacción / Disipación de calor...
  • Page 13 VOLTA-W-S/L technical manual Figure 2.2. Overall dimensions and hydraulic connections of the VOLTA-W-L model Description 1-6 kW Heating / cooling inlet; Male G1” Heating / cooling return; Male G1” Brine inlet; Male G1” Brine return, Male G1” DHW exchanger inlet; Male G1”...

  • Page 14: Unpacking

    VOLTA-W-S/L technical manual 1-6 kW Basic Compact 1058 1851 Table 2.2. Key to overall dimensions in mm. The factory installation is prepared for connection at the top. 2.3. Unpacking To unpack the heat pump, remove the wooden box carefully, remove the pallet anchoring screws and perform a check to make sure the heat pump has not been damaged during transportation.

  • Page 15: Recommended Positioning

    VOLTA-W-S/L technical manual Figure 2.4. Disassembly of the covers of VOLTA-W-L models VOLTA-W-S Models Disassemble the top cover. Remove the screws located at the rear and pull the cover upwards. Disassemble the front cover. Remove the screws located at the upper part and pull the cover upwards.

  • Page 16: Service Areas

    VOLTA-W-S/L technical manual Figure 2.6. Positioning and levelling the heat pump ▪ arning: VOLTA-W-S/L heat pumps have an IP20 protection rating. Their installation in damp DANGER! environments such as laundries or saunas, etc. is therefore prohibited. ▪ he heat pump must be stored in a room where there are no sources of ignition in continuous operation (e.g., naked flames, a working gas appliance or a working electric heater).

  • Page 17: Hydraulic Installation

    3.2. Brine circuit The VOLTA-W-S/L heat pumps can be used with horizontal or vertical (A) geothermal brine systems or by using groundwater (B). Aerothermal brine can also be used by replacing the geothermal collector with one or more VOLTA-W-O (C) aerothermal units. Finally, hybrid brine can be obtained by combining a geothermal collector with one or more VOLTA-W-O (D) aerothermal units.
  • Page 18 Brine systems with aerothermal units The brine circuit of the heat pump is connected directly to the VOLTA-W-O unit so the antifreeze mixture flows through a closed circuit, absorbing energy from the outdoor air when it passes through the VOLTA-W-O unit and yielding it in the heat pump evaporator.

  • Page 19: Heating / Cooling Circuit

    3.3. Heating / Cooling circuit The VOLTA-W-S/L heat pumps can be connected to various types of heating / cooling systems, both directly and by separating buffer storage tanks. On the other hand, these enable control over several devices that are external to the heating / cooling system directly from the heat pump's electrical panel.
  • Page 20 VOLTA-W-S/L technical manual FBus2 Figure 3.2. Single zone wiring scheme directly to the heating / cooling system FBus2 AI12 Figure 3.3. Dual zone wiring scheme directly to the heating / cooling system FBus2 DI10 AI12 AI13 DO14 Figure 3.4. Wiring scheme directly to the heating / cooling system...
  • Page 21 VOLTA-W-S/L technical manual Installation using buffer storage tanks If required by the application, the heat pump can also be connected to the heating / cooling system using a buffer separator tank. To do so, it is equipped with temperature sensors that are used to control a buffer storage tank for heating and a buffer storage tank for cooling.

  • Page 22: Dhw Circuit

    The pressure of the heating / cooling circuit must have a value of between 0.7 and 2 bar gauge (70 and 200 kPa). 3.4. DHW circuit VOLTA-W-L Models The VOLTA-W-L heat pumps are provided with an integrated inter storage tank with a capacity of 165 litres, so it does not require the installation of an external DHW storage tank. VOLTA-W-S Models The VOLTA-W-S heat pumps are designed to be used with external storage systems with a midway heat exchanger that can be either internal or external.

  • Page 23: Pool Circuit

    • In the VOLTA-W-S models, install a particulate filter in the return pipe to the heat pump with a mesh size no greater than 1 mm. It is recommended to install cut-off valves immediately before and after the filter to make it easier to clean or replace.

  • Page 24: Drain

    VOLTA-W-S/L technical manual Figure 3.8. Pool production wiring schemes 3.6. Drain Condensation may occur one certain internal heat pump components during normal operation. On the other hand, antifreeze mixture or water may spill from the heat pump's internal safety valves due to eventual circuit overpressure.

  • Page 25: Filling And Discharge Circuits

    Remove the air from the circuit using the traps installed for that purpose. Check the circuit pressure and repeat the filling process if necessary. The VOLTA-W-L models are equipped with a manual trap at the entry to the coil to bleed the DHW production circuit. Manual trap Figure 4.1.Bleeding the DHW production circuit in VOLTA-W-L models...

  • Page 26: Discharging The Circuits

    VOLTA-W-S/L technical manual Start the external recirculation pump and keep it running until the return is completely free of air and the antifreeze mixture is mixed perfectly. Open valve C and keep the external pump connected to remove the air between valves D and E.

  • Page 27: Electrical System

    Transformer fuse Figure 5.1. Location of the components in the VOLTA-W-S/L-*-6-230 electrical panel Several installation devices are controlled from the heat pump electrical panel. Some are internal and other are installed externally. The internal components are connected to the electrical panel in the factory. Depending on the installation that the heat pump is...
  • Page 28 (digital outputs DOxx) or regulation of pumps and/or valves (analogue outputs AOxx). The figure below shows a sample installation with the options for connecting external components to the heat pump. Figure 5.2. General scheme of the heat pump's electrical connections Example shown is an VOLTA-W-S model.
  • Page 29 VOLTA-W-S/L technical manual Analog inputs (AIxx) These terminals are used to connect external temperature sensors. Only passive NTC temperature sensors can be connected, so cable connection polarity is not important. If necessary, use extension cables with a maximum length of 50 m and a minimum diameter of 0.75 mm .
  • Page 30 VOLTA-W-S/L technical manual Analog outputs (AOxx) These terminals send analogue 0-10Vdc regulation signals to modulate the control of outlet units with mixture, aerothermal brine units with variable speed fan, external auxiliary boilers, etc. On the other hand, these connectors have a 24Vac power supply terminal to supply the modulating valve motor.

  • Page 31: Heat Pump Control Power Supply

    Depending on the heat pump model, the compressor power supply may require a single-phase 1/N/PE 230 V / 50-60 Hz or a three- phase 3/PE 400 V / 50-60 Hz power supply. The VOLTA-W-S/L range has only one power supply that powers all the components.

  • Page 32: External Protections

    The outside temperature sensor, supplied with the heat pump, has to be installed for the heat pump to work properly. The VOLTA-W-S/L range is equipped with an NTC outdoor temperature sensor. When installing the sensor, bear the following indications in mind: ▪...

  • Page 33: External Production Equipment

    Table 5.8. Auxiliary equipment connection terminals. 5.10. Aerothermal or hybrid brine systems These are used to control activation of the aerothermal (VOLTA-W-O range) and geothermal brine systems. They also generate a regulation signal for the variable speed fan of the VOLTA-W-O unit.

  • Page 34: Alarm Signal

    VOLTA-W-S/L technical manual Description Signal Type Connector Analog input NTC 10K 25 ºC sensor AI12 Analog output Regulation 0 – 10Vdc Aerothermal collector (VOLTA-W-O Defrost activation Relay digital output range) 230Vac / 2A maximum Fan activation Relay digital output DO16...

  • Page 35: Inside Environment Control

    VOLTA-W-S/L technical manual Remote WINTER / SUMMER program selection Used for remote selection of the heat pump operation program. DHW production Enables / disables the DHW production function. If the function is enabled, DHW production is governed by the DHW configuration in the heat pump controller.

  • Page 36: Remote Control By Bus

    Installation without interior terminals The VOLTA-W-S/L heat pumps can also be used in installations that do not have any type of interior terminal to generate request signals. In these cases, a continuous request can be imposed at the digital input of the unit to activate by selecting the appropriate control logic in the controller.

  • Page 37: Energy Meter

    For more information about BUS connections, please contact your distributor. NOTE 5.15. Energy meter The heat pump allows MODBUS communication with energy meters supplied by VOLTA Heat Pumps. Before installing the energy meter, carefully read its assembly instructions. Description Signal...

  • Page 38: Start-Up

    VOLTA-W-S/L technical manual 230 Vac 5Vdc 5Vdc 24Vac 230 Vac L L on 24Vac 13 14 230 Vac 24Vac 24Vac 5Vdc 24Vac 230Vac 24Vac 230Vac 24Vac 5Vdc 24Vac Vout Vout 24Vac 230Vac Vout 24Vac Vout 230Vac 24Vac Vout 24Vac Vout...

  • Page 39: Technical Specifications Volta-W-S| Volta-W-L

    VOLTA-W-S/L technical manual 7. Technical specifications VOLTA-W-S| VOLTA-W-L 7.1. Component location Description Description Production outlet Compressor suction temp. sensor Production inlet Compressor drain temp. sensor Brine outlet Brine outlet temp. sensor Brine inlet Brine inlet temp. sensor DHW inter-storage tank outlet Production outlet temp.
  • Page 40 VOLTA-W-S/L technical manual VOLTA-W-S-H VOLTA-W-S-P 33 34 31 32 33 34 31 32 VOLTA-W-S-A VOLTA-W-S-F 33 34 31 32 33 34 31 32...
  • Page 41 VOLTA-W-S/L technical manual VOLTA-W-S...
  • Page 42 VOLTA-W-S/L technical manual VOLTA-W-L-H VOLTA-W-L-P 33 34 31 32 33 34 31 32...
  • Page 43 VOLTA-W-S/L technical manual VOLTA-W-L-A VOLTA-W-L-F 33 34 31 32 33 34 31 32...
  • Page 44 VOLTA-W-S/L technical manual VOLTA-W-L VOLTA-W-S/L...

  • Page 45: Power Circuit Diagram

    VOLTA-W-S/L technical manual 7.2. Power circuit diagram VOLTA-W-S/L Vout Tx/Rx - Tx/Rx+ Tx/Rx - Tx/Rx+ Tx/Rx - Tx/Rx+ DO17 DO16 DO15 DO14 DO13 DO12 DO11 DO10 +Vdc +5VR NO10 NC10 +Vdc +5VR Out2 DI7H Out3 DI7C Out4 DI8H NO11 NO12...

  • Page 46: Volta-W-S/L Electrical Connection Tables

    VOLTA-W-S/L technical manual 7.3. VOLTA-W-S/L electrical connection tables ANALOG INPUTS CONNECTIONS DESCRIPTION Connection terminal Controller terminal Type Signal Block I / AI1 pCOOEM+ / J2 / U1 NTC 10K 25°C Compressor suction temperature Block I / AI2 pCOOEM+ / J2 / U2...
  • Page 47 VOLTA-W-S/L technical manual DIGITAL OUTPUTS CONNECTIONS DESCRIPTION Connection Controller terminal Type Signal terminal Block III / DO1 pCOOEM+ / J16 / NO1-NC1 Activation 230Vac / 1A max Free cooling production Block III / DO2 pCOOEM+ / J27 / NO9-NC9 Activation 230Vac / 2A max...

  • Page 48: Load Losses

    VOLTA-W-S/L technical manual 7.4. Load losses VOLTA-W-S/L-*-6-230 Condenser Evaporator Free cooling 1000 1125 1250 1375 1500 Flow (l/h) 7.5. Brine circulation pump VOLTA-W-S/L-*-6-230 Grundfos UPM3K 15-75 130 1 x 230 V, 50/60 Hz...

  • Page 49: Production Circulator Pumps

    VOLTA-W-S/L technical manual 7.6. Production circulator pumps Main circulator pump VOLTA-W-S/L-*-6-230 Grundfos UPM3 15-75 130 1 x 230 V, 50/60 Hz 8. Operation map VOLTA-W-S/L-*-6-230 -2; 80 35; 80 -25; 54 35; 10 -25; 10 Brine / cooling outlet temperature (°C)
  • Page 50 5; 80 50; 80 -18; 54 50; 10 -18; 10 Outdoor temperature (°C) VOLTA-W-S/L with VOLTA-W-O in cooling mode 10; 35 55; 35 55; 5 10; 5 Outdoor temperature (°C) The maximum compressor speed is not guaranteed over the entire compressor operating map.

  • Page 51: Operation Curves

    VOLTA-W-S/L technical manual 9. Operation curves VOLTA-W-S/L-*-6-230 B0/W35 B0/W35 B5/W35 B5/W35 B10/W35 B10/W35 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Compressor speed (%) B0/W35 B5/W35 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100...
  • Page 52 VOLTA-W-S/L technical manual VOLTA-W-S/L-*-6-230 with VOLTA-W-O-6-230 A-7/W35 A-7/W35 A2/W35 A2/W35 A7/W35 A12/W35 A7/W35 A12/W35 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Compressor speed (%) A-7/W35 A2/W35 A7/W35 A12/W35...
  • Page 53 VOLTA-W-S/L technical manual VOLTA-W-S/L-P-6-230 | VOLTA-W-S/L-F-6-230 Flow rate source = Flow rate cooling = 600 l/h Flow rate source = Flow rate cooling = 1200 l/h DT = T4 – T2 (°C)

  • Page 54: Technical Data Table

    NOTE Replacing or combining the geothermal collector with one or more VOLTA-W-O aerothermal units. Refer to the VOLTA-W-O aerothermal units manual for more detailed information. In compliance with EN 14511. this includes the consumption of the circulation pumps and the compressor driver.
  • Page 55 VOLTA-W-S/L technical manual VOLTA VOLTA W- VOLTA W- VOLTA W- VOLTA-W-S/L-*-6-230 specifications Units W-S/L-H S/L-P S/L-A S/L-F Place of installation Indoors Type of brine system Geothermal ✓ ✓ ✓ ✓ Application Heating ✓ ✓ Integrated active cooling ✓ ✓ Integrated Free cooling Compressor modulation 12.5 - 100...
  • Page 56 VOLTA-W-S/L technical manual VOLTA-W-S/L-*-6-230 with VOLTA-W-O-6-230 specifications Units VOLTA W-S/L-P VOLTA W-S/L-F Place of installation Indoors Type of brine system Aerothermal / Hybrid Application ✓ ✓ Heating ✓ Integrated active cooling Compressor modulation 12.5 - 100 Heating power , A7W35...

  • Page 57: Symbols

    VOLTA-W-S/L technical manual 11. Symbols DHW circuit 3-way valve open/closed Pool 3-way thermostatic valve Heating system 3-way modulating valve 0-10Vdc Cooling system Check valve NTC temperature sensor Cut-off valve Relay thermostat Safety valve Differential pressure valve Data bus communication terminal...
  • Page 60 Rúa das Pontes 25, 36350 Nigrán (Pontevedra) Spain contact@voltaheatpumps.com +34 986 262 184 VOLTA-W-S/L PRO Gen2 TECHNICAL service manual Version 02.0X/2023 The manufacturer reserves the right to make any necessary changes to the contents of this manual without prior notice.

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