HTW ECO-THERMAL R32 Series Data Book
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HTW ECO-THERMAL R32 Series Data Book

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DATABOOK
ECO-THERMAL R32
HTW-V5WD2N8 | HTW-V7WD2N8 | HTW-V12WD2N8
HTW-V16WD2N8 | HTW-V16WD2RN8
Please, read carefully this manual before using the product.
T h a n k yo u

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Summary of Contents for HTW ECO-THERMAL R32 Series

  • Page 1 DATABOOK ECO-THERMAL R32 HTW-V5WD2N8 | HTW-V7WD2N8 | HTW-V12WD2N8 HTW-V16WD2N8 | HTW-V16WD2RN8 Please, read carefully this manual before using the product. T h a n k yo u...

  • Page 2: Part

    CONTENTS Part 1 General Information ................3 Part 2 Engineering Data ................19 Part 3 Installation and Field Settings ............48...

  • Page 4: Table Of Contents

    Part 1 General Information 1 M-Thermal Mono System ................4 2 Unit Capacities ................... 6 3 Nomenclature .................... 6 4 System and Design Unit Selection .............. 7 5 Typical Applications ................... 9...

  • Page 5: M-Thermal Mono System

    1 M-Thermal Mono System 1.1 System Schematic Figure 1-1.1: System schematic M-Thermal Mono is an integrated air-to-water space heating, space cooling and domestic hot water heat pump system. The outdoor heat pump system extracts heat from the outdoor air and transfers this heat through refrigerant piping to the plate heat exchanger in the hydronic system.
  • Page 6 1.2 System Configurations M-Thermal Mono can be configured to run with the electric heater either enabled or disabled and can also be used in conjunction with an auxiliary heat source such as a boiler. The chosen configuration affects the size of heat pump that is required. Three typical configurations are described below. Refer to Figure 1-1.2.

  • Page 7: Unit Capacities

    16kW Model V16WD2N8 V12WD2N8 V5WD2N8 V7WD2N8 V16WD2RN8 (HTW-) Appearance Notes: The presence or omission of the letter R in the model names indicates the unit’s power supply: R: 3-phase, 380-415V, 50Hz; Omitted: 1-phase, 220-240V, 50Hz. 3 Nomenclature Refrigerant N8: R32...

  • Page 8: System And Design Unit Selection

    4 System and Design Unit Selection 4.1 Selection Procedure Step 1: Total heat load calculation Calculate conditioned surface area Select the heat emitters (type, quantity, water temperature and heat load) Step 2: System configuration Decide whether to include AHS and set AHS’s switching temperature Decide whether backup electric heater is enabled or disabled Step 3: Selection of outdoor units Determine required total heat load on outdoor units...
  • Page 9 4.2 M-Thermal Leaving Water Temperature (LWT) Selection The recommended design LTW ranges for different types of heat emitter are:  For floor heating: 30 to 35⁰C  For fan coil units: 30 to 45⁰C  For low temperature radiators: 40 to 50⁰C 4.3 Optimizing System Design To get the most comfort with the lowest energy consumption with M-Thermal, it is important to take account of the following considerations:...

  • Page 10: Typical Applications

    5 Typical Applications 5.1 Space Heating Only The room thermostat is used as a switch. When there is a heating request from the room thermostat, the Mono unit operates to achieve the target water temperature set on the user interface. When the room temperature reaches the thermostat’s set temperature, the unit stops.
  • Page 11 5.2 Space Heating and Domestic Hot Water The room thermostats are not connected to the Mono unit but to a motorized valve. Each room’s temperature is regulated by the motorized valve on its water circuit. Domestic hot water is supplied from the domestic hot water tank connected to the Mono unit.
  • Page 12 5.3 Space Heating, Space Cooling and Domestic Hot Water Floor heating loops and fan coil units are used for space heating and fan coil units are used for space cooling. Domestic hot water is supplied from the domestic hot water tank connected to the Mono unit. The unit switches to heating or cooling mode according to the temperature detected by the room thermostat.
  • Page 13 5.4 Space Heating and Space Cooling Floor heating loops and fan coil units are used for space heating and fan coil units are used for space cooling. The room thermostats are not connected to the Mono unit but are connected to the fan coil units. Figure 1-5.4: Space heating and space cooling Legend Outdoor unit...
  • Page 14 5.5 Space Heating and Domestic Hot Water (Bivalent) 5.5.1 Auxiliary heat source provides space heating only Figure 1-5.5: Space heating and domestic hot water with auxiliary heat source providing space heating only Legend Outdoor unit Mixing station (field supplied) Plate heat exchanger Distributor (field supplied) Backup electric heater (customized) Collector (field supplied)
  • Page 15 5.5.2 Auxiliary heat source provides space heating and domestic hot water Figure 1-5.6: Space heating and domestic hot water with auxiliary heat source providing space heating and domestic hot water Legend Outdoor unit Mixing station (field supplied) Plate heat exchanger Distributor (field supplied) Backup electric heater (customized) Collector (field supplied)
  • Page 16 5.5.3 Auxiliary heat source provides additional heating If the Mono unit’s outlet temperature is too low, the auxiliary heat source provides additional heating to raise the water temperature to the set temperature. An additional 3-way valve is required. When the Mono unit’s outlet temperature is too low, the 3-way valve is open and the water flows through the auxiliary heat source.
  • Page 17 5.6 Space Heating Through Floor Heating Loops and Fan Coil Units Dual setpoint function application with or without two thermostat connect to the outdoor unit. The floor heating loops and fan coil units require different operating water temperatures. To achieve these two set points, a mixing station is required.
  • Page 18 5.7 Space Heating and Domestic Hot Water Heating with a solar energy kit Space heating application and domestic hot water heating with a solar energy kit connected to the system; space heating provided by heat pump, domestic hot water heating is provided by heat pump and solar energy kit. Figure 1-5.9: Space Heating and Domestic Hot Water Heating with a solar energy kit Legend Outdoor unit...

  • Page 20: Table Of Contents

    Part 2 Engineering Data 1 Specifications ................... 20 2 Dimensions and Center of Gravity ............26 3 Piping Diagrams ..................28 4 Wiring Diagrams ..................29 5 Capacity Tables..................35 6 Operating Limits ..................47 7 Hydronic Performance ................48 8 Sound Levels ....................

  • Page 21: Model

    1 Specifications HTW-V5WD2N8 / HTW-V7WD2N8 Table 2-1.1: HTW-V5(7)WD2N8 specifications HTW-V5WD2N8 HTW-V7WD2N8 Model name 220-240/1/50 Power supply V/Ph/Hz Capacity 4.65 6.65 Heating Rated input 0.93 1.35 5.00 4.94 Capacity 4.80 6.70 Heating Rated input 1.33 1.88 3.60 3.57 Capacity 4.65 6.80...
  • Page 22 Table 2-1.1: HTW-V5(7)WD2N8 specifications (continued) HTW-V5WD2N8 HTW-V7WD2N8 Model name 20.0 14.1 20.0 Plate type Water side heat exchanger 14.1 20.0 Water pump Pump head 14.1 Expansion tank Volume Type Refrigerant Charge Throttle type Electronic expansion valve Standard internal Optional Backup electric heater...
  • Page 23 HTW-V12WD2N8/HTW-V16WD2N8 Table 2-1.2: HTW-V12WD2N8 specifications Model name HTW-V12WD2N8 MHC-V16W/D2N8 220-240/1/50 Power supply V/Ph/Hz 16.30 Capacity 12.30 Heating 3.66 Rated input 2.56 4.45 4.81 16.20 Capacity 12.40 Heating 4.72 Rated input 3.52 3.43 3.53 16.10 Capacity 11.90 Heating 5.91 Rated input 4.28...
  • Page 24 Table 2-1.2: HTW- V12(16)WD2N8 specifications (continued) Model name HTW-V12WD2N8 HTW-V16WD2N8 30.0 26.8 30.0 Water side heat exchanger Plate type 26.8 30.0 Water pump Pump head 26.8 Expansion tank Volume Type Refrigerant Charge Throttle type Electronic expansion valve Standard internal Backup...
  • Page 25 HTW-V16WD2RN8 Table 2-1.4: HTW-V16WD2RN8 specifications Model name HTW-V16WD2RN8 380-415/3/50 Power supply V/Ph/Hz Capacity 16.30 Heating Rated input 3.63 4.49 Capacity 16.20 Heating Rated input 4.70 3.45 Capacity 16.10 Heating Rated input 5.83 2.76 Capacity 15.50 Cooling Rated input 3.63 4.27 Capacity 13.80...
  • Page 26 Table 2-1.4: HTW- V16W/D2RN8 specifications (continued) Model name HTW-V16WD2RN8 15.0 11.0 15.0 Water side heat exchanger Plate type 11.0 15.0 Water pump Pump head 11.0 Expansion tank Volume Type Refrigerant Charge Throttle type Electronic expansion valve Standard internal Optional Backup electric heater...

  • Page 27: Dimensions And Center Of Gravity

    2 Dimensions and Center of Gravity HTW-V5WD2N8 / HTW-V7WD2N8 Figure 2-2.1: HTW-V5(7)W/D2N8 dimensions and center of gravity (unit: mm)
  • Page 28 HTW-V12WD2N8 / HTW-V16WD2N8 / HTW-V16WD2RN8 Figure 2-2.2: HTW-V12(16)WD2(R)N8 dimensions and center of gravity (unit: mm)

  • Page 29: Piping Diagrams

    3 Piping Diagrams HTW-V5WD2N8 / HTW-V7WD2N8 Figure 2-3.1: HTW-V5(7)W/D2N8 piping diagram Legend Compressor 4-Way Valve Gas-liquid separator Air side heat exchanger Electronic expansion Valve Single-way electromagnetic valve Liquid Tank Strainer Water Side Heat Exchanger (Plate Heat Exchange) Backup heater (optional)

  • Page 30: Wiring Diagrams

    Wiring Dia grams HTW-V5WD2N8 / HTW-V7WD2N8 V5(7)W/D2N8 wiring diagram Figu re 2‐4.1: HTW‐ TRANS Figure  contin n ued  on  next  pa a ge  …...
  • Page 31 Figure 2‐4.1: HTW‐V5(7)W/D2N8 wiring diagram (continued))  20 0 1901...
  • Page 32 HTW-V12WD2RN8 / HTW-V16WD2RN8 Figure 2-4.2: HTW-V12(16)WD2RN8 Wiring Diagram TRAN N S Figure  continued  on  next  page  …...
  • Page 33 Figure 2‐4.2: HTW‐V12(16)WD2N8 wiring diagram (continued) ...
  • Page 34 HTW-V16WD2RN8 Figure 2‐4.3 HTW‐V16WD2RN8 wiring diagram: Figure  contin n ued  on  next  pa a ge  …...
  • Page 35 Figure 2‐4.3 HTW-V16WD2RN8 wiring diagram (continued) ...

  • Page 36: Capacity Tables

    5 Capacity Tables 5.1 Heating Capacity Tables Table 2-5.1: HTW-V5WD2N8 heating capacity - peak values LWT (⁰C) Outdoor air temp. ⁰C DB ⁰C WB -25.0 3.90 2.58 -20.0 4.78 3.13 2.33 -15.0 5.06 3.61 2.54 1.90 1.73 -7.0 -8.0 5.95 4.22...
  • Page 37 Table 2-5.3: HTW-V7WD2N8 heating capacity - peak values LWT (⁰C) Outdoor air temp. ⁰C DB ⁰C WB -25.0 3.74 2.54 -20.0 4.59 3.08 2.35 -15.0 4.86 3.55 2.56 1.95 1.82 -7.0 -8.0 5.71 4.16 3.23 2.61 2.18 1.85 1.60 -2.0 -3.0...
  • Page 38 Table 2-5.5: HTW-V12WD2N8 heating capacity - peak values LWT (⁰C) Outdoor air temp. ⁰C DB ⁰C WB -25.0 3.55 2.48 -20.0 4.35 3.00 2.32 -15.0 4.61 3.46 2.52 1.93 1.80 -7.0 -8.0 10.2 5.44 4.05 3.18 2.59 2.16 1.83 1.57 -2.0...
  • Page 39 Table 2-5.7: HTW-V16WD2N8 heating capacity - peak values LWT (⁰C) Outdoor air temp. ⁰C DB ⁰C WB -25.0 3.20 2.29 -20.0 3.93 2.78 2.18 -15.0 10.5 4.16 10.2 3.21 2.38 1.85 1.75 -7.0 -8.0 13.5 4.91 13.0 3.75 12.5 3.00 12.1 2.48 11.6...
  • Page 40 Table 2-5.9: HTW-V16WD2RN8 heating capacity - peak values LWT (⁰C) Outdoor air temp. ⁰C DB ⁰C WB -25.0 3.20 2.29 -20.0 3.93 2.78 2.18 -15.0 10.5 4.16 10.2 3.21 2.38 1.85 1.75 -7.0 -8.0 13.5 4.91 13.0 3.75 12.5 3.00 12.1 2.48 11.6...

  • Page 41: Cooling Capacity Tables

    5.2 Cooling Capacity Tables Table 2-5.9: HTW-V5WD2N8 cooling capacity LWT (⁰C) Outdoor air temp. ⁰C DB 3.70 2.92 2.52 2.30 2.03 1.81 5.06 4.00 3.44 3.14 2.77 2.47 6.10 4.82 4.15 3.79 3.34 2.98 6.86 5.42 4.67 4.26 3.76 3.35 7.39...
  • Page 42 Table 2-5.12: HTW-V16WD2N8 cooling capacity Outdoor LWT (⁰C) air temp. ⁰C DB 11.3 3.18 10.9 2.58 10.6 2.24 10.3 2.05 10.0 1.81 1.61 14.4 4.35 13.9 3.53 13.5 3.06 13.2 2.80 12.8 2.47 12.3 2.20 16.1 5.24 15.5 4.26 15.0 3.70...

  • Page 43: Operating Limits

    6 Operating Limits Figure 2-6.1: Heating operating limits Abbreviations: T4: Outdoor temperature (°C) T1: Leaving water temperature (°C) Notes: Shaded areas indicate no heat pump operation (backup electric heater or auxiliary heat source only) Figure 2-6.2: Cooling operating limits Abbreviations: T4: Outdoor temperature(°C) T1: Leaving water temperature (°C) Notes:...

  • Page 44: Hydronic Performance

    7 Hydronic Performance HTW-V5WD2N8 / HTW-V7WD2N8 Figure 2-7.1: HTW-V5(7)WD2N8 hydronic performance 240V 220V Water flow rate (m Abbreviations: ESP: External static pressure Notes: I, II and III indicate water pump speed: I: Low; II: Medium; III: High. ...
  • Page 45 HTW-V12WD2N8 / HTW-V16WD2N8 / HTW-V16WD2RN8 Figure 2-7.2: HTW-V12(16)WD2(R)N8 hydronic performance 220V 240V Water flow rate (m Abbreviations: ESP: External static pressure Notes: I, II and III indicate water pump speed: I: Low; II: Medium; III: High. ...

  • Page 46: Sound Levels

    8 Sound Levels 8.1 Overall Table 2-8.1: Sound pressure levels Model name dB(A) HTW-V5WD2N8 48.8 HTW-V7WD2N8 52.3 57.6 HTW-V12WD2N8 HTW-V16WD2N8 58.1 59.0 HTW-V16WD2RN8 Notes: Sound pressure level is measured at a position 1m in front of the unit and (1+H)/2m (where H is the height of the unit) above the floor in a semi-anechoic chamber.
  • Page 47 8.2 Octave Band Levels Figure 2-8.2: HTW-V5WD2N8 octave band levels Cooling in rated frequency Outdoor air temperature 35⁰C DB; EWT 12⁰C, LWT 7⁰C NR-90 Heating in rated frequency NR-80 Outdoor air temperature 7⁰C DB, NR-70 85% R.H.; EWT 30⁰C, LWT 35⁰C.
  • Page 48 Figure 2-8.4: HTW-V12WD2N8 octave band levels Cooling in rated frequency Outdoor air temperature 35⁰C DB; EWT 12⁰C, LWT 7⁰C NR-90 Heating in rated frequency NR-80 Outdoor air temperature 7⁰C NR-70 DB, 85% R.H.; EWT 30⁰C, LWT 35⁰C. NR-60 NR-50 Heating in rated frequency NR-40 Outdoor air temperature 7⁰C...
  • Page 49 Figure 2-8.5: HTW-V16WD2RN8 octave band levels Cooling in rated frequency Outdoor air temperature 35⁰C DB; EWT 12⁰C, LWT 7⁰C NR-90 Heating in rated frequency NR-80 Outdoor air temperature 7⁰C DB, 85% NR-70 R.H.; EWT 30⁰C, LWT 35⁰C. NR-60 Heating in rated frequency NR-50 Outdoor air temperature 7⁰C DB, 85%...

  • Page 50: Accessories

    9 Accessories 9.1 Standard accessories Table 2-9.1: Standard accessories Quantity HTW-V5WD2N8 HTW-V12WD2N8 Name Shape HTW-V7WD2N8 HTW-V16WD2N8 HTW-V16WD2RN8 Outdoor unit installation and owner’s manual User interface owner’s manual Technical data manual Y-shaped filter Water outlet connection pipe assembly Wired controller Tighten belt for customer wiring use...
  • Page 52 Part 3 Installation and Field Settings 1 Preface to Part 3 ..................58 2 Installation ....................59 3 Water Pipework ..................64 4 Electrical Wiring ..................68 5 DIP Switch Settings ................... 72 6 Internal Circulator Pump Speed Settings ..........72 7 User Interface Field Settings ..............
  • Page 53 1 Preface to Part 3 1.1 Notes for Installers Boxes The information contained in this Engineering Data Book may primarily be of use during the system design stage of a Midea M-Thermal Mono project. Additional important information which may primarily be of use during field installation has been placed in boxes, such as the example below, titled “Notes for installers”.
  • Page 54 2 Installation 2.1 Acceptance and Unpacking  Notes for installers  When units are delivered check whether any damage occurred during shipment. If there is damage to the surface or outside of a unit, submit a written report to the shipping company. ...
  • Page 55 If turn the air outlet side toward the building's wall, fence or screen. Make sure there is enough room to do the installation Figure 3-2.3: Installation room illustration Table 3-2.1: Installation room requirement(Unit: mm) Model HTW-V5W/D2N8 1000 HTW-V7W/D2N8 HTW-V12W/D2N8 HTW-V16W/D2N8...
  • Page 56 2.5 Cold Climate Installation In cold climate locations installation should take account of the following considerations: Figure 3-2.4: Snow shielding Never install the unit at a site where the suction side may be exposed directly to wind. To prevent exposure to wind, install a baffle plate on the air discharge side of the unit. To prevent exposure to wind, install the unit with its suction side facing the wall.
  • Page 57 Figure 3-2.8: Installation with obstacles in front of the unit Table 3-2.2: Minimum spacing from obstacles in front of the unit Model name A (mm) ≥500mm HTW-V5W/D2N8 ≥1000 HTW-V7W/D2N8 HTW-V12W/D2N8 HTW-V16W/D2N8 ≥1500 HTW-V16W/D2RN8 ≥200mm...
  • Page 58 Figure 3-2.9: Installation with obstacles behind the unit ≥500mm ≥20mm ≥300mm 2.9.2 Installation in Rows Figure 3-2.10: Single row installation Table 3-2.3: Single row installation spacing requirements Model name (mm) (mm) (mm) (mm) HTW-V5W/D2N8 ≥1500 ≥500 ≥150 ≥300 HTW-V7W/D2N8 ＜1/2 H HTW-V12W/D2N8 HTW-V16W/D2N8 ≥2000 ≥1000 ≥150 ≥300...
  • Page 59 3 Water Pipework 3.1 Water Circuit Checks M-Thermal Mono units are equipped with a water inlet and outlet for connection to a water circuit. M-Thermal Mono units should only be connected to closed water circuits. Connection to an open water circuit would lead to excessive corrosion of the water piping.
  • Page 60 To determine the maximum allowed water volume in the entire circuit, proceed as follows: Determine the calculated pre-pressure (Pg) for the corresponding maximum water volume using the Figure 3-3.1. Figure 3-3.1: Maximum water volume A1: System without glycol for 1-phase 12~16kW and 3-phase 12~16kW unit A2: System without glycol for the 5/7kW unit Maximum water volume(L)
  • Page 61 When using non-copper metallic piping, be sure to insulate the two kind of materials from each other to prevent galvanic corrosion. For copper is a soft material, use appropriate tools for connecting the water circuit. Inappropriate tools will cause damage to the pipes 3.4 Water Circuit Anti-freeze Protection Ice formation can cause damage to the hydronic system.
  • Page 62 That in case of an installation with a domestic hot water tank, only the use of propylene glycol is allowed. In other installations the use of ethylene glycol is fine. That no automotive glycol is used because their corrosion inhibitors have a limited lifetime and contain silicates that can foul or plug the system;...

  • Page 63: Electrical Wiring

    4 Electrical Wiring 4.1 General  Notes for installers Caution  All installation and wiring must be carried out by competent and suitably qualified, certified and accredited professionals and in accordance with all applicable legislation.  Electrical systems should be grounded in accordance with all applicable legislation. ...
  • Page 64 Make sure no external pressure is applied to the terminal connectors. When installing the ground fault circuit interrupter make sure that it is compatible with the inverter (resistant to high frequency electrical noise) to avoid unnecessary opening of the ground fault circuit interrupter This unit is equipped with an inverter.
  • Page 65 Figure 3-4.4: Wiring overview for 12/16kW models Legend Outdoor unit P_d: DHW pump (field supplied) Solar energy kit (field supplied) SV2: Motorized 2-way valve (field supplied) User interface SV1: Motorized 3-way valve (field supplied) Room thermostat (field supplied) Domestic water tank (field supplied) Auxiliary heating source (field supplied) Immersion heater (field supplied) P_s: Solar pump (field supplied)
  • Page 66 Table 3-4.1: Wiring requirements Required number of Maximum running Item Description Current Minimum wiring size conductors current Solar energy kit signal wire 200mA 0.75mm User interface wire 200mA 0.75-1.25mm Room thermostat wire 2 or 3 200mA 0.75mm Auxiliary heating source control 200mA 0.75mm wire...

  • Page 67: Dip Switch Settings

    5 DIP Switch Settings DIP switches S1 and S2 on the hydronic system main PCB should be used to specify refrigerant piping length and to specify whether certain components have or have not been installed. Refer to Table 3-5.1 and to the M-Thermal Mono Service Manual, Part 4, 2.2 "Main PCB for Hydronic System".
  • Page 68 7 User Interface Field Settings 7.1 Introduction During installation, the M-Thermal Mono’s settings and parameters should be configured by the installer to suit the installation configuration, climate conditions and end-user preferences. The relevant settings are accessible and programmable through the FOR SERVICEMAN menu on the M-Thermal Mono’s user interface. The user interface menus and settings can be navigated using the user interface’s touch-sensitive keys, as detailed in Table 3-7.1.

  • Page 69: Menu Structure

    7.2 Menu Structure 1 DHW MODE SETTING 1.1 DHW MODE dT5_ON 2 COOL MODE SETTING 1.2 TANK HEATER dT1S5 3 HEAT MODE SETTING 1.3 DISINFECT T4DHWMAX 4 AUTO MODE SETTING 1.4 DHW PRIORITY T4DHWMIN 5 TEMP. TUPE SETTING 1.5 DHW PUMP t_INTERVAL_DHW 6 ROOM THERMOSTAT 7 OTHER HEATING SOURECE...
  • Page 70 7.3 FOR SERVICEMAN Menu FOR SERVICEMAN allows installers to input the system configuration and set Figure 3-7.2: FOR SERVICEMAN password screen the system parameters. To enter FOR SERVICEMAN, go to MENU > FOR SERVICEMAN. Enter the password, using ◄ ► to navigate between digits and using ▼ ▲ to adjust the numerical values, and then press OK.
  • Page 71 Figure 3-7.5 illustrates the operation of the heat pump and Figure 3-7.5: DHW mode operation immersion heater in DHW mode. If the DHW tank water temperature (T5) is less than the minimum of the DHW set temperature (T5S) and the heat pump leaving water temperature operating limit (T5stop) (refer to Figure 2-6.3 in Part 2, 6 “Operating Limits”) less dT5_ON (refer to Part 3, 7.4.2 “DHW MODE Menu”), the heat pump starts providing...
  • Page 72 T4DHWMAX sets the ambient temperature above which the heat Figure 3-7.8: T4DHWMAX and T4DHWMIN pump will not operate in DHW mode. The highest value that T4DHWMAX can take is 43°C, which is the DHW mode upper ambient temperature operating limit of the heat pump. Abreviations: T4DHWMIN sets the ambient temperature below which the heat HP: Heat pump...
  • Page 73 To enter the DHW PRIORITY menu, navigate to the DHW MODE SETTING menu, scroll to YES on the DHW PRIORITY line and press OK. DHW PRIORITY Figure 3-7.12: menu t_DHWHP_MAX sets the maximum length of time that the heat pump will run in DWH mode before switching to space heating mode or space cooling mode if a requirement for space heating/cooling modes exists.
  • Page 74 T4CMAX sets the ambient temperature above which the heat pump will Figure 3-7.16: T4CMAX, T4CMIN not operate in cooling mode. For HTW-V5(7,9)W/D2N8, the highest value that T4CMAX can take is 43°C. For HTW-V12(16)W/D2N8, the highest value that T4CMAX can take is 46°C. T4CMAX is the cooling mode upper ambient temperature operating limit of the heat pump.
  • Page 75 t_INTERVAL_C sets the cooling mode compressor re-start delay. When the compressor stops running, it will not re-start until at least t_INTERVAL_C minutes have elapsed. 7.6 HEAT MODE SETTING Menu MENU > FOR SERVICEMAN > HEAT MODE SETTING HEAT MODE SETTING Figure 3-7.19: menu In HEAT MODE SETTING the following parameters should be...
  • Page 76 Figure 3-7.23: dTSH dTSH sets the temperature difference between the actual room temperature (Ta) and set room temperature (TS) above which the heat pump provides heated water to the space heating terminals. When TS – Ta ≥ dTSH the heat pump provides heated water to the space heating terminals and when Ta ≥...
  • Page 77 ROOM TEMP. sets whether space heating/cooling modes are controlled according to the room temperature detected by the temperature sensor in the M-Thermal Mono user interface. If YES is selected, the user is able to set the room temperature set temperature on the user interface’s main screen. If YES is selected for both WATER FLOW TEMP.
  • Page 78 AHS sets whether or not the system has an additional heating source and, if it does, whether or not it should be used. If the system does not have an additional heating source, select NON. If the system has an additional heating source and the M-Thermal Mono unit should be able to control it, select YES.
  • Page 79 7.10.3 ADDITIONAL HEATING SOURCE menu MENU > FOR SERVICEMAN > OTHER HEATING SOURCE > ADDITIONAL Figure 3-7.32: ADDITIONAL HEATING SORUCE menu HEATING SOURCE To enter the ADDITIONAL HEATING SOURCE menu, navigate to the OTHER HEATING SOURCE menu, scroll to YES on the ADDITIONAL HEATING SOURCE line and press OK.
  • Page 80 7.11 HOLIDAY AWAY SETTING Menu MENU > FOR SERVICEMAN > HOLIDAY AWAY SETTING Figure 3-7.35: HOLIDAY AWAY SETTING menu The HOLIDAY AWAY SETTING menu settings are used to set the outlet water temperature to prevent water pipes freezing when away from home in cold weather seasons.
  • Page 81 Figure 3-7.38: TEST RUN start screen and TEST RUN menu 7.14.2 POINT CHECK menu MENU > FOR SERVICEMAN > TEST RUN > POINT CHECK The POINT CHECK menu is used to check the operation of individual components. Use ▼▲ to scroll to the components you want to check and press ON/OFF to toggle the on/off state of the component.
  • Page 82 7.14.4 CIRCULATION PUMP RUNNING operation Figure 3-7.42: CIRCULATION PUMP RUNNING display MENU > FOR SERVICEMAN > TEST RUN > CIRCULATION PUMP RUNNING The CIRCULATION PUMP RUNNING operation is used to check the operation of the circulation pump. When the circulation pump running operation starts, all running components stop.
  • Page 83 On systems with no auxiliary heat source and no backup electric heater, the heat pump will then operate until the water temperature rises to the set temperature or the heat mode running operation is exited by pressing OK. If any error code is displayed during the cool mode running operation, the cause should be investigated. Refer to Part 3, 9 “Error Code table”.
  • Page 84 7.15.3 PREHEATING FOR FLOOR Figure 3-7.48: Preheating for floor menu MENU > FOR SERVICEMAN > SPECIAL FUNCTION > PREHEATING FOR FLOOR During initial start-up and when water temperature is low, it is important that the water is heated gradually. Or it may result in concrete floors cracking due to rapid temperature change.
  • Page 85 7.15.4 FLOOR DRYING UP MENU > FOR SERVICEMAN > SPECIAL FUNCTION > FLOOR DRYING UP For newly-installed under-floor heating systems, floor drying up mode can be Figure 3-7.51: FLOOR DRYING UP menu used to remove moisture from the floor slab and subfloor to prevent warping or rupture of the floor during floor heating operation.
  • Page 86 8 Climate Related Curves Figure 3-8.1: WEATHER TEMP. SET menu The climate related curves can be selected in the user interface, MENU > PRESET TEMPERATURE > WEATHER TEMP. SET. The curves for heating mode and ECO heating mode are the same but the default curve is curve 4 in heating mode, while in ECO mode, the default curve is curve 6.
  • Page 87 Figure 3-8.3: High temperature curves for heating mode T1s(°C) T4(℃) Outdoor ambient temperature (⁰C ) Notes: It only has the curves of the low temperature setting for heating, if the high temperature is set for heating. Curve 4 is default in high temperature heating mode and curve 6 is default in ECO mode. Figure 3-8.4: Low temperature curves for cooling mode T1s(°C) T4(℃)
  • Page 88 Figure 3-8.5: High temperature curves for cooling mode T1s(°C) T4(℃) Outdoor ambient temperature (⁰C ) Notes: It only has the curves of the low temperature setting for cooling, if the high temperature is set for cooling. Curve 4 is default in high temperature cooling mode and curve 6 is default in ECO mode.

  • Page 89: Error Code Table

    9 Error Code Table Table 3-9.1: Error code table Error code Content Transducer module temperature too high protect Water flow failure Phase sequence error Communication error between outdoor unit and user interface Backup electric heater exchanger water outlet temperature sensor error Domestic hot water tank temperature sensor error Air side heat exchanger refrigerant outlet temperature sensor error Outdoor ambient temperature sensor error...
  • Page 90 Table 3-9.1: Error code table (continued) Compressor frequency variation greater than 15Hz within one second protection Actual compressor frequency differs from target frequency by more than 15Hz protection Water side heat exchanger anti-freeze protection High temperature protection of refrigerant outlet temperature of condenser in cooling mode Water side heat exchanger inlet temperature is higher than outlet temperature in heating mode...
  • Page 91 PORTUGAL ITALY info@htwfrance.com info@htw.pt info.it@htwspain.com IMPORTANT INFORMATION FOR CORRECT DISPOSAL OF THE PRODUCT IN ACCORDANCE WITH EC DIRECTIVE 2002/96/EC. At the end of its working life, the product must not be disposed of as urban waste. It must be taken to a special local authority deifferentiated waste collection centre or to a dealer providing this service.

This manual is also suitable for:

Eco-thermal r32 htw-v5wd2n8Eco-thermal r32 htw-v7wd2n8Eco-thermal r32 htw-v12wd2n8Eco-thermal r32 htw-v16wd2n8Eco-thermal r32 htw-v16wd2rn8

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