Important Pre-Installation Information; Connection To The Grid - Notifying The Dno; Heat Pump Sizing; Heat Pump Location - Dimplex A8M Installation Manual

2.

Important pre-installation information

CAUTION: You must read and understand all of the information in this section before attempting an
installation!

2.1 Connection to the Grid - Notifying the DNO

Before you connect a heat pump to the grid, the necessary permissions must be granted by the
distribution network operator. Not obtaining the necessary permissions may result in an unexpected
network upgrade charge, and may compromise the integrity of the local supply if a 'disturbing load' is
connected to the network.
The required forms are supplied by Dimplex and must be filled in by the heat pump installer alongside the
client. We recommend notifying the DNO as early as possible in the planning stage to discuss the project
and any additional information. Further information can be found on the Energy Networks website
(www.energynetworks.org) or from your local DNO.

2.1.1 Heat Pump Sizing

NOTE: Ensure that the correct size heat pump has been selected in accordance with the latest version of
MIS3005 (for UK installations).
If a non A-Class heat pump cylinder is being used, ensure that it has been accurately sized with the
appropriate coil surface area of the cylinder to match the heat pump's output and flow rate requirements,
and that all necessary hydraulic connections have been considered in connecting it to the heat pump
system.
Ensure that suitable heat emitters have been sized in accordance with the BRE publication Design of low-
temperature domestic heating systems: A guide for system designers and installers. To maximise
system efficiency it is important to design the system with the lowest flow temperature possible.
For more information on sizing heat emitters or to order BRE publications, please visit the BRE bookshop
website: www.brebookshop.com

2.2 Heat Pump Location

• The heat pump must be installed outdoors.
• The fan should not face prevailing winds to ensure correct air flow through the evaporator.
• The minimum clearance distances provided in this manual must be followed.
• NO obstructions in front of the heat pump fan for at least 1m.
• Clearance is important for good air flow and service access to the heat pump.
• Do not position the heat pump close to bedroom windows, as the fan and compressor may be
operational at night.
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