Dimplex System S: Air-to-Water Split Heat Pump System

A Part L Solution for Residential New Build.

System S: The Sustainable Solution for Intelligent Heating

The Dimplex System S is a new split air-to-water heat pump system, offering a flexible and versatile solution for heating and hot water generation in new build properties. Created by Dimplex, it is ideally suited for energy-efficient heating and hot water in new build properties, designed as a low carbon, high efficiency system for detached and semi-detached houses.

The indoor unit features plug-and-play installation and simple controls for intuitive operation. Utilising intelligent inverter technology, the system can operate in outdoor temperatures down to -25°C, producing hot water up to 60°C.

The solution uses R32 Refrigerant, which has a low Global Warming Potential (GWP), creating a more environmentally friendly option that improves the building's carbon footprint. The indoor unit has a compact footprint of 595 x 600mm and contains everything required for heating control within the dwelling, including a 210-litre hot water cylinder. The system is available in 6 kW and 10 kW output sizes.

Your Advantages with System S

  1. Suitable for a range of applications: Available in two output sizes (6kW and 10kW) and equipped with modern inverter technology to supply heating and hot water to new residential dwellings.
  2. High efficiency: Utilises efficient operation to produce low carbon hot water up to 60°C and remains operational in outdoor temperatures as low as -25°C. It offers cost-effective energy with a Coefficient of Performance (COP) up to 5 (A7/W35).
  3. Smart operation: Control is available via the Dimplex Home App, allowing occupants easy control on the go. A premium version provides installers with access to automatic fault notifications, graphical evaluation of device data, and troubleshooting assistance.
  4. Environmentally friendly: Features low GWP R32 Refrigerant with a maximum filling quantity of 1.8kg.
  5. Space-saving: The outdoor unit has a maximum height of 865mm for the 10kW model and 712mm for the 6kW model. The indoor unit has a footprint of just 595 x 600mm and is designed for 'plug and play' installation with integrated features for rapid installation.

System S: Outdoor Unit

Compact and Powerful for Low Carbon Homes

The outdoor unit features a space-saving design and modern colour scheme, allowing it to integrate harmoniously into the surroundings of the building.

Efficient and Powerful Operation: Thanks to inverter technology, System S intelligently adapts to the heating and hot water requirements of the dwelling, remaining operational in temperatures as low as -25°C.

Sustainable Design for Low Carbon Homes: It is designed to use R32 Refrigerant, a low GWP refrigerant with minimal impact on the ozone layer and global warming compared to traditional refrigerants. It operates with a COP up to 5 (A7/W35).

Suitable for a Range of Projects: System S is available in two output sizes, 6kW and 10kW, with a maximum refrigerant charge of 1.8kg. Designed for discrete fitting, the 6kW and 10kW units have a total height of 712mm and 865mm respectively, allowing them to sit below the height of a conventional UK windowsill.

Textual description of image: A modern, detached house with the compact black outdoor unit of the Dimplex System S positioned neatly on the lawn in front of it, demonstrating its harmonious integration into the building's surroundings.

Dimensions and Acoustic Performance

6kW Outdoor Unit: Weight: 60kg. Dimensions: 1008mm (width) x 712mm (height) x 426mm (depth).

10kW Outdoor Unit: Weight: 78.5kg. Dimensions: 1118mm (width) x 865mm (height) x 523mm (depth).

The System S has been designed to be acoustically non-intrusive, making it ideal for projects where noise density is a consideration.

Textual description of sound comparison diagram: A bar chart comparing the sound level of the 6kW System S (37.6 dB(A)) to other noise sources: Bedroom (15 dB(A)), Washing machine (54 dB(A)), Vacuum cleaner (64 dB(A)), Lawn mower (65 dB(A)), and Hand drill (69 dB(A)). The diagram highlights that the System S is significantly quieter than common household appliances and tools.

Textual description of sound emission diagram: A circular diagram illustrating the sound pressure levels emitted by the 6kW outdoor unit at different distances: 47.1 dB(A) at 1m, 41.1 dB(A) at 2m, and 37.6 dB(A) at 3m. This demonstrates how sound levels decrease with distance. The text indicates this demonstrates Sound Pressure at 3m A7/W55.

Noise (Sound Power – EN 14825)
Condition 6kW 10kW
Heating A7/W35 58 ? dB(A) 60 ? dB(A)
Quiet Mode 53 ? dB(A) 55 ? dB(A)

Technical Data

Refrigerant Lines

The maximum pipe length between the indoor and outdoor unit is 15m. Units are prefilled for up to 15m. The 6kW and 10kW units are prefilled with 1.5Kg and 1.8Kg of refrigerant respectively.

Piping Dimensions: Standard length 15m. For the 6kW variant, dimensions are 1/4" and 5/8". For the 10kW variant, dimensions are 3/8" and 5/8". The heat pump uses flared connections to connect the pipework to the indoor and outdoor units.

Installation: Installations containing refrigerant must be carried out by a registered F-gas installer. The installation must adhere to local building codes.

Water Free: The outdoor unit contains no water, so there is no need to add Glycol.

System S: Indoor Unit

Simplified Installation

The System S indoor unit features a sleek, contemporary design that allows for seamless integration into modern living spaces. With a space requirement of just 595 x 600mm, this compact indoor unit requires a minimal footprint.

A Ready-Made Heat Pump System: It contains everything required for heating control within residential dwellings. In addition to the heating function, all necessary hydraulic components and a 210-litre hot water tank are built into the unit.

Note: A separate 25-litre buffer should be installed alongside the indoor unit.

Plug and Play: In other words, "connect and go". With System S, installation time is reduced to a minimum as all necessary components are integrated within the unit. The connections are made from above the unit.

Extremely Simple Operation: Operation is easy and convenient thanks to the touch display on the front of the unit.

Textual description of image: A smiling family (man, woman, child) in a bright, modern kitchen, suggesting the heat pump system is part of a comfortable and family-friendly home environment.

Intuitive Operation

The Dimplex Touch Display

The controller integrated into the heat pump intelligently and automatically ensures efficient and comfortable operation. Thanks to the intuitively designed user interface of the touch display, all settings can be made easily on site. With the NWPM Touch Network Card, System S can be connected to any router via a LAN cable and controlled via a smart device.

For installers and maintenance technicians, this provides access to service data, including a range of performance parameters, help with system diagnostics, and information on outdoor unit performance.

Textual description of image: A close-up of the integrated colour touch display on the indoor unit, showing a user-friendly interface with options like 'home', 'system-status', 'room-control', and 'operation mode'. It displays current temperatures and system status.

Smart Control: The Dimplex Home App

With the Dimplex Home app, the control of the heat pump system can be accessed at any time and from anywhere. The intuitively designed app interface allows occupants to set different temperatures for individual rooms, schedule the start of heating at specific times, or activate holiday mode when away. By connecting to System S, users gain more control to heat their dwelling efficiently and sustainably.

Note: Room thermostat controls are supplied by Dimplex separately.

Textual description of image: A smartphone screen displaying the Dimplex Home App interface. The app shows options for 'Operating mode' including 'Automatic', 'Manual', 'Only domestic hot water', 'Heating operation', 'Party', 'Vacation', and 'Only heating element', along with current system status and temperature readings. Below the app screen, icons indicate download links for the App Store and Google Play.

A Complete System

The Perfect Heating and Hot Water Solution

Simple "Plug and Play" Principle: Connect and get started.

Integrated Colour Touch Display: Simple and intuitive operation via a 4.3-inch colour display directly on the indoor unit.

Complete Heat Pump System: Including a 210-litre DWH (Domestic Hot Water) cylinder and necessary hydraulic components.

Compact Dimensions: Outdoor unit maximum height 864mm. Indoor unit footprint 595 x 600mm.

Product Specification

Variants: 6kW and 10kW with 210l Hot Water Cylinder

Part Numbers and Descriptions
Part No. Description Model
400001377 6kW System (Outdoor & Indoor Unit) System S6: LIA 0608HWCF MS
400001378 10kW System (Outdoor & Indoor Unit) System S10: LIA 0911HWCF MS
500001963 25L Buffer Unit System S 25L Buffer - B25L
380910 System S6 Fridge Pipe - 1/4" + 5/8" x 15M System S6 FP
380920 System S10 Fridge Pipe - 3/8" + 5/8" x 15M System S10 FP
381730 System S Wall Bracket System S WB

Note: 25L buffer should be installed alongside the indoor unit.

Dimplex Split Unit Model (Capacity)
6kW 10kW
Model System S6: LIA 0608HWCF MS System S10: LIA 0911HWCF MS
Design Heat Source Air Air
Controller WPM Touch WPM Touch
Thermal Energy Metering No No
Installation Location Indoors / Outdoors Indoors / Outdoors
Degree of Protection (EN 60529) For Compact Unit Or Heating Element IPX4 IPX4
Performance Level INVERTER INVERTER
Operating Limits Heating Water Outlet Range (°C) 12 to 60 12 to 60
Ambient Conditions (Heating) (°C) -25 to +35 -25 to +35
System Characteristic Nominal Flow Rate EN 14511 (m³/h) 0.75 1.47
Minimum Flow Rate (m³/h) 0.45 0.75
Noise (Sound Power - EN 14825) ODU Sound Power - Heating A7 / W35 (dB(A)) 58 ? 60 ?
Quiet Mode (dB(A)) 53 ? 55 ?
Dimensions, Weights and Filling Quantities Indoor Unit Dimensions (WxHxD) (mm) 595 x 1880 x 600
Outdoor Unit Dimensions (WxHxD) (mm) 1008 x 712 x 426 1118 x 865 x 523
Weight of Transportable Outdoor Unit / Incl Packaging (kg) 60 / 65.5 78.5 / 92
Device Connections For Heating G3/4"
Refrigerant Type / Weight (kg) R32 / 1.5 R32 / 1.8
Electric Back Up Heater Power (kW) 6 6
Electrical Supply Voltage / Fuse Protection: Outdoor Unit 1~/N/PE 230V (50Hz) / C20A
Supply Voltage / Fuse Protection: Indoor Unit 1~/N/PE 230V (50Hz) / B32A
RCD Type B
Control Voltage / Fuse Protection 1~/N/PE 230V (50Hz) / B13A
Starting Current (A) -- --
Nominal Power Consumption At A7 / W35 (EN 14511) (kW) 1.24 MAX 2.00 MAX
Nominal Current At A7 / W35 (A) 5.40 8.70
Nominal Power Consumption At A2 / W35 (EN 14511) (kW) 1.26 MAX 2.02 MAX
Additional Model Features & Performance
Feature 6kW 10kW
Method of Defrosting Reverse Cycle
Condensate Tray and Pipework Frost Protection Yes
Heat Output / COP - EN 14511 (kW/COP)
A-7/W35 6.21 / 2.86 8.31 / 3.11
A2/W35 5.50 / 3.95 8.20 / 4.05
A7/W35 6.20 / 5.00 10.00 / 5.00
A7/W45 6.35 / 3.75 10.00 / 3.80
A7/W55 5.22 / 1.96 7.05 / 1.97
A7/W55 (Second entry) 6.90 / 2.91 9.72 / 3.04
Hot Water Cylinder Volume (litres) 210
Inner Cylinder Duplex stainless steel LDX2102
Inlet / Outlet Stainless Steel
Coil Stainless Steel
Insulation EPS (GWP=2.37, ODP=1.84x10-7)
Reheat Time (A7; cylinder temperature 55°C) (mins) 126 70
Cold Water Supply Minimum Dynamic Pressure (bar) 1.5
Maximum Pressure (bar) 12
Minimum Flow Rate (litres/min) 15
Connections Cold Water Inlet, Balanced Cold Water Outlet and Hot Water Outlet G3/4"
Heating Flow and Heating Return G3/4"
Refrigerant Gas 5/8" Flare
Refrigerant Liquid 1/4" Flare 3/8" Flare
Coil Specification Heat Pump Coil Surface Area (m²) 2.2
Heat Pump Coil Max Output (kW) 45
Maximum Working Pressure (bar) 3
Safety Components Pressure Reducing Valve and Strainer (bar) 3
Expansion Relief Valve (bar) 6
Temperature and Pressure Relief Valve (bar/°C) 7 / 90
Factory Pressure Test (bar) 12
Heat losses Maximum standing heat loss (EN 15223) (kWh/24h) 1.72

Contact Information

Dimplex: Part of Glen Dimplex Heating & Ventilation

Dimplex Millbrook House, Grange Drive, Hedge End, Southampton, Hampshire, United Kingdom SO30 2DF

T: 0344 879 35 88 (select option 2)

E: gdhv.contracting@glendimplex.com

W: www.dimplex.co.uk

Glen Dimplex Ireland UC Airport Road, Cloghran, Co. Dublin K67 DT89 Ireland

T: +353 (0)1 8424833

E: salesireland@glendimplex.com

E: serviceireland@glendimplex.com

W: www.glendimplexireland.com

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