Dimplex LI AS, LI MS User Manual

Drawing freely available heat from the ambient air, even

at chilly outside temperatures as low as –20°C Dimplex

LI MS and LI AS air source heat pumps are the cost

effective and energy efficient heating and hot water

solution of the future.

The heat pump is designed for installation indoors, with

air ducts or hoses providing inlet/outlet air from the

outside. For space saving, a built-under buffer tank is

also available.

Range of 2 models with nominal heating capacities of 11kW (single phase) and 16kW (three phase).

Indoor installation in a basement, utility room or garage.

Air ducting kits provided as accessories.

Complementary built-under buffer tank for space saving.

Operational temperatures from +35°C down to –20°C.

Energy optimised, auto adaptive defrosting cycle.

Variable heating water flow temperatures up to 55°C.

Typical CoP (A2/W35): 3.2 – 3.4

(depending on model).

Supplied complete with wall mountable WPM 2004 Plus Heat Pump Manager.

Scroll compressor, providing efficient, low noise running.

Economiser, providing high co-efficients of performance.

Electronic soft starter controls to reduce starting currents.

LI MS / LI AS RANGE KEY FEATURES:

EVEN COLD AIR IS FULL OF ENERGY

heat pumps

using nature’s energy

INDOOR AIR SOURCE HEAT PUMPS

LI MS / LI AS

EVERYTHING IS UNDER CONTROL

Dimplex LI MS and LI AS air source heat pumps utilise the WPM2004 Plus Heat Pump Manager designed to regulate, control and monitor the entire heating system.

The heat pump, heating and hot water pumps, mixer motor and supplementary heating sources are all automatically activated by the wall mounted WPM2004 Plus unit.

Water temperatures for up to 3 space heating circuits plus domestic hot water are individually programmable, providing maximum comfort and efficiency.

Simple to understand ‘warmer / cooler’ buttons adjust the temperature settings, while the heating system can be programmed to operate on a timed basis if required.

The WPM2004 Plus Heat Pump Manager allows Dimplex LI MS and LI AS air source heat

pumps to provide full control over 3 separate heating circuits as well as the preparation of

domestic hot water.

Key features:

Simple 6 key operation. Large, well laid out illuminated display with indication of present operating status and service messages. Dynamic menu-based user guidance, adapted to the configuration of the heat pump system. Interface for remote control unit with identical menu options. Outdoor temperature controlled heating cycle. Control over 3 heating circuits and domestic hot water. Priority control:

– Water heating takes priority over space heating. Automatic actuation of supplementary heat sources (electric immersion heater or gas/oil boiler). Automatic actuation of mixer valves for supplementary heat source (gas/oil boiler or solar energy storage system).

Heating Zone 3

Heating Zone 2

Heating Zone 1

DHW

Tank

Heat Pump

Buffer Tank

Dimplex heat pumps offer a variety of services—providing the home with comfortable warmth is only one of them. It can also produce all the hot water needed for the kitchen or bathroom.

Dimplex provides all the components needed for these applications, including buffer tanks, hot water cylinders, heating system manifolds and hydraulic accessories.

1. WPM2004 Plus Heat Pump Manager

With air source heat pumps the Heat Pump Manager is supplied in its own housing for wall mounting.

2. Buffer tank

A 140L under-unit buffer tank is available for use with Dimplex LI MS and LI AS heat pumps, providing the benefit of minimising the space required.

A buffer tank extends operating times and ensures a minimum water flow rate through the heat pump in all operating conditions. Where the heat pump provides the sole source of heating, an electric immersion element can also be integrated to provide supplementary heating if required.

3. Heating system connections

A range of compact accessories are available to ensure a professional and trouble-free heat pump installation, with all the connections and individual components combined and assembled in the minimum of space. Options include:

Compact manifold with shell-type insulation and integrated hot water connection. Hot water module for connection of an additional heating circuit (e.g. hot water heating). Simultaneous connection of compact manifold and hot water module to the heat pump via a manifold bar.

4. Hot water cylinder

For the central hot water supply Dimplex offers a range of unvented hot-water cylinders, sized correctly for the maximum heating capacity of the heat pump.

An integrated temperature sensor is connected to the heat pump manager, allowing the heat pump to automatically control the production of hot water as and when it is required.

AIR SOURCE HEAT PUMPS — BENEFITS OF THE UK CLIMATE

Compared with central Europe (where air source heat pumps are already very popular), the UK has a relatively moderate winter climate.

With average winter temperatures of around 5°C, seasonal coefficients of performance comparable with ground source heat pumps are achievable, without the additional cost of expensive ground loop systems having to be installed.

Average UK temperatures over 12 month period

maximum temperature (°C)

minimum temperature (°C)

DIMPLEX HEAT PUMP ACCESSORIES

MAMJ J AS OND

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