Grant Aerona 3 HPID10R32, Instructions Manual, Page: 14 / 100

Section 3: Installation Information Page 14
3.7 INSTALLING THE HEAT PUMP
3.7.1 INSULATION
The complete water circuit, including all pipework, must be
insulated to prevent heat loss reducing the efficiency of the heat
pump and also to prevent damage due to frozen pipes.
3.7.2 CONNECTING THE HEATING SYSTEM TO THE
HEAT PUMP
• Water connections must be made in accordance with diagrams
in this manual and the labels on the heat pump.
• Be careful not to deform the heat pump pipework by using
excessive force when connecting.
• Pipework should be flushed before connecting the heat pump.
• Hold the pipe end downwards when removing burrs.
• Cover the pipe end when inserting it through a wall so that no
dust and dirt can enter.
• The heat pump is only to be used in a sealed heating
system. It must not be used as part of an open-vented
system.
Before continuing the installation of the heat pump, check the
following points:
•
The maximum system water pressure is 3 bar.
• Make sure the hose is connected to the pressure relief valve to
avoid any water coming into contact with electrical parts.
• Air vents must be provided at all high points of the system. The
vents should be located at points which are easily accessible
for servicing. An automatic air purge valve is provided inside
the heat pump. Check that the air purge valve can operate.
• Take care that the components installed in the pipework can
withstand the water pressure.
3.7.3 SLEEVING FOR PIPES AND CABLES
All pipes passing through external walls should be individually
sleeved, using either copper or plastic pipe for the sleeve.
The inside diameter of this sleeving should be large enough to
accommodate the insulation on heating system pipes, usually at
least 6mm larger than the outside diameter of the insulation.
It is important that the sleeve is correctly built into the wall structure
using a cement mortar or suitable filler.
The annular gap between the pipe/insulation and the sleeve
should be even all round with at least one end sealed with a mastic
sealant, to prevent the ingress of water or vermin whilst allowing
the pipe to move and maintain the fire-resistant properties of the
structure.
Whilst not essential, it is also recommended as good practise to
sleeve any cables passing through external walls, following the
basic requirements as given above. This will make it easier to
remove/replace any cables in future, should it be necessary.
3.7.4 SYSTEM CONNECTIONS
The system connections of the heat pump must be carried out using
the flexible hoses, valves and fittings supplied with the heat pump.
The hydraulic circuit must be completed following the
recommendations below:
1. It is important to install the isolation valves between the heat
pump and the building.
2. The flow regulator (supplied with the heat pump) must be
installed on the return to the heat pump. Refer to Figure 4-1
and Section 9.13.
3. The system must have drain cocks in the lowest points.
4. Air vents must be included at the highest points of the system.
5. A system pressure gauge must be installed upstream of the
heat pump.
6. All pipework must be adequately insulated and supported.
7. The presence of solid particles in the water can obstruct the
heat exchanger. Therefore, protect the heat exchanger using a
magnetic filter such as a Grant Mag-One.
3.5.3 CONDENSE DISPOSAL
The underside of the heat pump has a condensate outlet (refer to
Figure 3-2) that allows any condensate to drain from the heat pump.
Provision must be made to safely collect and dispose of the
condensate.
For example, use 40 mm waste pipe to form a condensate disposal
system into which the condensate flows from the opening in the
bottom of the heat pump casing running to a suitable gulley or
soakaway.
! WARNING !
It is essential that the condensate is able to drain away and
not allowed to run onto any adjacent paths or driveways
where, in winter, this will result in icing and a potential haz-
ard for anyone walking near the heat pump.
The top of the concrete base must be either level with, or
above, the surrounding ground level.
Condensate outlet
Figure 3-2:
Condensate outlet
3.5.4 VIBRATION
If the vibration from the heat pump is likely to cause a nuisance, use
the anti-vibration mounts (product code: HPIDFOOT/KIT2) and fix
the heat pump securely to the mounts. These anti-vibration mounts
are not suitable for units that have been wall mounted.
3.6 WALL MOUNTED INSTALLATIONS
All four sizes of Grant Aerona³ heat pump can be wall mounted at a
safe height, with the top of the unit no more than 2m above ground
level, where no specialist access equipment (such as mobile tower
or scaffolding) is required to provide a safe working place to carry
out servicing or repairs.
Grant UK can supply a suitable mounting bracket for the HPID6R32
and HPID10R32 models (product code: HPIDWALLBRKT2). This
has a maximum Safe Working Load of 90kg and is thus suitable for
both the HPID6R32 and HPID10R32 heat pumps only.
If any other method of wall mounting is used, for example with the
HPID13R32 and HPID17R32 heat pumps, it is the responsibility of
the installer to select a suitable mounting method. Grant UK cannot
take any responsibility for any mounting brackets other than the one
supplied.
In all cases, care should be taken to determine that the condition of
the wall is suitable to carry the load imposed by the heat pump and
ensure that the mounting bracket is firmly secured to the wall, using
suitable fixings for the wall construction concerned.
If installed in a position where specialist access equipment, such as
a mobile tower or scaffolding, is required to provide a safe place of
work to carry out servicing or repairs, then the cost and provision
of this equipment is the responsibility of the property owner/user
irrespective of whether the heat pump is deemed to be at fault or
not.