Applications

Installation types

Dimplex SI TER+ ground source heat pumps are suitable for the following types of application:

Non domestic – the SI TER+ range uses a three phase electricity supply, making them suitable for a range of non-domestic/ commercial applications with heat load demands up to 75kW

Multiple heat pumps can be installed in parallel if required.

Heating system types

Dimplex SI TER+ ground source heat pumps are suitable for use with the following types of heating distribution system:

Underfloor heating – the ideal choice for use with a heat pump. The larger heating surface area available allows lower water temperatures to be used (i.e. 35ºC - 45ºC), helping to improve the efficiency of the heat pump system.

Radiators – The SI TER+ range has a maximum water output temperature of 55ºC, making it possible for use with radiators providing the radiators are correctly sized.

Boiler systems usually run at much higher water output temperatures (75ºC +), therefore for lower water temperatures produced by a heat pump, the size of each radiator has to be approximately doubled to enable the same level of heat output.

Hot water

Stored hot water – when used with a correctly sized Dimplex hot water cylinder, the SI TER+ range can produce stored water temperatures of approximately 50ºC.

Where there is a requirement to store water at higher temperatures, this can be boosted with a supplementary electric heating element installed in the water cylinder and controlled by the heat pump WPM controller.

Hot water from recovered heat – waste heat extracted from the building can be recovered to provide highly efficient domestic hot water heating.

Simultaneous heating/cooling and hot water – additional heat exchangers fitted within the SI TER+ units enables hot water to produced at the same time as space heating or cooling.

Cooling

It is possible to use SI TER+ ground source heat pumps in the following ways for cooling:

Active cooling – the heat pump process is reversed to provide cooling by extracting heat from within the building and transferring it back into the ground via the ground collector for use later in the year when needed for heating

In active cooling mode, waste heat extracted from the building can be recovered to provide highly efficient domestic hot water heating or provide swimming pool heating .

Either active or passive cooling can be provided in the following ways:

Silent cooling – using under floor heating (or other surface heating systems) by passing cool water through them.

Large cooled surfaces reduce the room temperature by approximately 3-5ºC) without draughts or air movement.

Dynamic cooling – via fan convectors able to cool (or heat) the air in the room according to need.