Section 3: Installation InformationPage 10
3.3 Regulations
Installation of a Grant Aerona³ heat pump must be in accordance with the
following recommendations:
• National Building Regulations, e.g. Approved Document G
• Technical Guidance Document L- Conservation of fuel and Energy-
Dwellings (2019)
• SR 50-1: Code of practice for building services- Part 1- Domestic
plumbing and heating.
• Local Bylaws (check with the Local Authority for the area)
• Water Supply (Water Fittings) Regulations 1999
• MCS Installer Standards (if applying for the Renewable Heat Incentive)
• MIS 3005 (Requirements for contractors undertaking the supply,
design, installation, set to work commissioning and handover of
microgeneration heat pump systems)
• MCS 020 (MCS Planning Standards)
• MCS 021 (MCS Heat Emitter Guide for Domestic Heat Pumps)
The installation should also be in accordance with the latest edition of the
following standards and codes of Practice:
• BS 7671 and Amendments
• BS EN 12831
3.4 Heat Pump Location
3.4.1 Selection of position
• Consider a place where the noise and the air discharged will not affect
neighbours.
• Consider a position protected from the wind.
• Consider an area that reflects the minimum spaces recommended.
• Consider a place that does not obstruct the access to doors or paths.
• The surfaces of the floor must be solid enough to support the weight of
the heat pump and minimise the transmission of noise and vibration.
• Take preventive measures so that children cannot reach the unit.
• Install the heat pump in a place where it will not be inclined more than
5°.
• When installing the heat pump where it may exposed to strong wind,
brace it securely.
• If the Aerona³ heat pump is to be installed within 1km of the coast, avoid
siting facing the sea.
• If the Aerona³ heat pump is to be installed within 10km of the coast, the
evaporator must be sprayed with AFC50 and this must be repeated on
each annual service.
• For heat pumps fitted within 5km of the coast, Grant recommend the
unit is pretreated with Blygold, which is done during the manufacturing
process.
Decide the mounting position as follows:
1. Install the heat pump in a location which can withstand the weight of the
heat pump and vibration. Please make sure it is installed level.
2. Provide the indicated space to ensure good airflow.
3. Do not install the heat pump near a source of heat, steam, or flammable
gas.
4. During heating operation, condensate water flows from the heat pump.
Therefore, install the heat pump in a place where the condensate water
flow will not be obstructed.
5. Do not install the heat pump where strong wind blows directly onto the
heat pump or where it is very dusty.
6. Do not install the heat pump where people pass frequently.
7. Install the heat pump in a place where it will be free from adverse
weather conditions as much as possible.
3.4.2 Noise Level
All heat pumps make a noise. Discuss the potential nuisance factor with the
end-user when considering the final position of the heat pump. Take opening
windows and doors into account. It is not essential for the heat pump to be
positioned next to a wall of the house. Behind an out-building may be more
suitable so discuss the options with the end-user.
3.4.3 Orientation
The North face of the building will usually have colder ambient air than any
other side. To ensure maximum efficiency from the Grant Aerona³ heat pump,
position the heat pump on a warmer side. In order of preference, site the heat
pump on a South face followed by either South East or South West, then by
East or West. Only install on a North face if there is no other alternative.
3.5 Preparation for Installation
3.5.1 Base
The heat pump should be installed on a flat trowelled finished concrete base
150mm thick. This base should extend at least 150mm beyond the heat pump
on three sides.
To avoid bridging the DPC, leave a gap of at approximately 150mm between
the concrete base and the wall of the house.
The heat pump must be raised up from the base by approximately 100mm on
suitable anti vibration mounts or blocks.
3.5.2 Clearances
The following minimum clearances must be used to enable the product to be
easily commissioned, serviced and maintained and allow adequate air flow
in and out of the heat pump.
Refer to Table 3-1 and Figure 3-2.
Table 3-1: Clearances
Aspect Minimum clearance required (mm)
Top 300
Bottom Approximately 100*
Front 600
Rear 300
Left 100
Right 600
* Height of A/V mounts (product code: HPIDFOOT/KIT)
00
3
r
evO
mm
Ov
e
r
6
0
0
m
m
Ov
e
r
1
0
0
m
m
Over 300 mm
Ov
e
r
6
0
0
m
m
Figure 3-2: Clearances
HPID6R32
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