Installer Information - MIS3005

MIS3005 V3.1 - the new MCS installer standard for heat pumps

Introduced from March 1st 2012, it affects the design of all heat pump systems after this date. The changes are intended to ensure consistently high performance for heat pump installations by introducing more prescriptive and easy to follow design standards for MCS compliant systems.

Dimplex Renewables now offers installers a new design service, aimed at providing all the information required to prepare an MIS3005 compliant quotation. Simply download and complete our survey form and return it to our design team.

We can also provide installers with training on the requirements of MIS3005.

Key elements of the standard include:How Dimplex can help
1. Heat loss calculation
An accurate heat loss calculation must be performed in accordance with EN12831 to determine the required heating capacity of the properties heating system.
An inaccurate assessment of the heat loss can mean the system selected cannot meet the requirements.		 Our new MIS3005 design service will provide a full quote containing the information required, including a heat loss calculation
2. Heat pump sizing and selection
The heat pump selected must be capable of meeting the properties heat loss at the intended design temperature and design conditions. This is known as the "100% sizing rule". Bear in mind that air source heat pump output can reduce at lower outside temperatures and / or increasing water flow temperatures, so this must be taken into consideration We'll size the heat pump for you to meet the requirements of the standard.

Our new Air-Eau air source heat pumps provide extremely stable outputs, even at low temperatures, so are an ideal solution for domestic installations
3. Hot water cylinder selection
The hot water cylinder selected needs to account for the number of people in the property, the daily hot water requirement and have a suitably sized heat exchanger for use with a heat pump. We'll specify the cylinder for you in accordance with the requirements. Our new EC-Eau cylinder range are specifically designed for heat pump use.
4. Heating system flow temperature
The flow temperature of the heating system must be chosen to maximise the efficiency of the heat pump system and the type of heat emitters being used.
Consideration of the impact on heat pump output and efficiency of using higher water flow temperatures needs to be given.		 Our heat pump sizing calculations will take this into account to ensure compliance with the standard.
5. Heat emitter selection
Heat emitters need to be selected and sized such that they are able to meet the heat loss requirements of each room.
Consideration of their output at the intended heating system flow temperature needs to be given, eg larger radiators will be needed for lower flow temperatures. The new Heat Emitter Guide has been designed to assist with this.
A "Temperature Star Rating" must be provided for each quotation to provide guidance on the system efficiency.		 We'll calculate the heat loss for each room and recommend suitable heat emitters.

Fan assisted radiators - such as Dimplex Smartrads - are recommended as an ideal solution in the Heat Emitter Guide.
6. Ground loop heat exchanger design
For ground source heat pumps, the quantity of pipe installed in the ground needs to meet the refrigeration capacity requirements of the heat pump system based on the ground type, pipework specifications and run hours of the system. We'll calculate the ground collector requirements, based on the MCS022 documents.

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