Grant Aerona 3 HPID10R32, Instructions Manual, Page: 6 / 100

Section 1: Introduction Page 6
1.1 GENERAL
The Grant Aerona³ range consists of four compact, lightweight,
MCS approved, monobloc, air-to-water, inverter driven, single-
phase air source heat pumps working with R32 refrigerant.
It is important that these installation and servicing instructions are
followed to ensure correct installation and operation. Failure to do
so may result in poor performance.
These instructions do not replace the installation or users manuals
for any additional components used in the design of your system
e.g. cylinders, motorised valves, programmers, solar thermal
devices, buffers, etc.
These instructions must be left with the product for future
reference.
1.2 MAIN COMPONENTS
Each model incorporates the following main components:
•
DC inverter - this responds rapidly to changing conditions
to provide the necessary output to meet heating demands
by varying the speed and output of the compressor, fan
and circulating pump. This reduces the on/off times of the
compressor, keeping the water temperature constant during
operation reducing the electricity consumption.
•
Compressor - a high-efficiency DC twin-rotary compressor to
provide smooth performance and quiet operation.
•
Plate heat exchanger (condenser) - the high-efficiency plate
heat exchanger is used to transfer heat to the heating system
primary circuit.
•
Fan - a high-efficiency DC fan motor is used for smooth and
quiet operation. A single fan is fitted to the HPID6R32 (5 blade)
and HPID10R32 (3 blade) units. Two fans (3 blade) are fitted to
the HPID13R32 and HPID17R32 units.
•
Circulating pump - high-efficiency DC pump speed controlled
from the ASHP control PCB.
•
Base tray heater - factory fitted electric heater prevents
condensate in the base of the heat pump from freezing. When
the ambient temperature reaches 2.5°C, the base tray heater
turns on and at 5.5°C turns off ( Δ T of 3k). This cannot be
adjusted or turned off. Refer to Section 2.3.
•
Pressure relief valve - a 3 bar pressure relief valve is factory
fitted.
•
Air purge valve (automatic air vent) - factory fitted to assist
in the removal of air from the heating primary circuit of the heat
pump.
1.3 PLANNING PERMISSION
The installation of a Grant Aerona³ heat pump on domestic
premises may be considered to be permitted development, not
needing an application for planning permission, provided ALL the
limits and conditions listed on the Planning Portal website are met.
For further information, visit www.planningportal.gov.uk.
1 Introduction
1.4 DNO APPLICATION
Under all circumstances there is a requirement to inform the
Distribution Network Operator (DNO) of the installation of a
heat pump. This will be in the form of either an application or a
notification to the DNO.
Notification is the process whereby if the proposed addition/
alteration is assessed by the installer to be within the existing rating
of the supply equipment and the maximum demand (MD) is ≤32A,
the heat pump can be installed and the DNO notified retrospectively
(i.e. within 28 days). This option is only possible for the Grant
Aerona³ HPID6R32 and HPID10R32 models; and is only available
if certain criteria are met. Please review the process detailed in the
web link below.
For all other units an application must be made to the DNO before
connecting the heat pump(s) to the mains electrical supply.
The time to get permission from the local DNO will vary and can
take up to four weeks, so it is essential to submit the application at
the earliest possible date. Please note that the cost of any required
changes to the electrical supply network may be rechargeable to
the homeowner in question.
Further details on application/notification process can be found at
https://www.energynetworks.org/operating-the-networks/connecting-
to-the-networks/connecting-electric-vehicles-and-heat-pumps
The same forms are used for either notification or application and
for the Grant Aerona³ ASHP can be downloaded from the Grant
UK website (www.grantuk.com). These must be completed by the
installer or electrician and then submitted to the correct DNO for the
area in question.
There are six DNOs operating the electrical distribution network
throughout England, Scotland and Wales and the application must
be made to the DNO covering the area in which the installation is
situated.
To Identify the DNO concerned visit the Energy Networks
Association (ENA) website at www.energynetworks.org/info/
faqs/who-is-my-network-operator.html or use the Meter Point
Administration Number (MPAN) on the electricity meter fitted in the
property.