Grant Aerona 3 HPID10R32, Instructions Manual, Page: 18 / 100

Page 18
4.1 SEALED SYSTEM REQUIREMENTS
4 Sealed Systems
Table 4-1: Key to Figure 4-1
Key Description
1 Grant Aerona³ ASHP
2 Flexible hose
3 Isolation valve
4 Flow regulator
5 Mag One magnetic filter
6 Volumiser
6a Grant External Volumiser
7 Drain point
8 Removable filling loop
9 Double check valve
10 Pressure gauge
11 Expansion vessel
12 Pressure relief valve
13 Tundish
14 Automatic system by-pass
15 Motorised 2-port valve (DHW)
16 Automatic air vent
17 DHW cylinder
18 Motorised 2-port valve (CH)
19
Additional circulating pump
(refer to Section 8.3.7)
20 Thermostatic radiator valve
All Grant Aerona³ heat pumps must be used with sealed systems
complying with the requirements of BS EN 12828, BS EN 12831
and BS EN 14336.
The system must be provided with the following items:
• Diaphragm expansion vessel complying with BS EN 13831
• Pressure gauge
• Pressure relief (safety) valve
• Approved method for filling the system
Expansion vessel
The expansion vessel can be fitted in either the return or flow
pipework in any of the recommended positions as shown in Figure
4-1. To reduce the operating temperature of the expansion vessel,
position it below the pipe to which it is connected.
The expansion vessel may be positioned away from the system,
providing the connecting pipe is not less than 13 mm diameter. If
the expansion vessel is connected via a flexible hose, care must
be taken to ensure that the hose is not twisted.
! NOTE !
Ensure that the expansion vessel used is of sufficient size
for the system volume.
Refer to BS 7074:1:1989 or The Domestic Heating Design
Guide for sizing the required vessel.
Figure 4-1: Sealed System heating components
Section 4: Sealed Systems
Scale: NTS
Paper Size: A3
Project Title: ASHP with Volumiser
Drawing Set: ASHP Pipe Schematics
Status: Approved
Rev Date: 25/04/22 Drawn By: CG Checked By: PS
Dwg. No. HPPS0001
Revision: 1.4
This drawing and its content is subject to copyright. Use other than for its original intended purpose must be arranged with an employee of Grant UK Ltd.
Hopton House, Hopton Industrial Estate, Devizes, Wiltshire, SN10 2EU, tel; 01380 736920
Item Description
1 Grant Aerona³ ASHP
2 Flexible hose
3 Isolation valve
4 Flow regulator
5 Magnetic filter
6 Volumiser (with no immersion
element)
6a Grant External Volumiser
7 Drain point
8 Removable filling loop
9 Double check valve
10 Pressure gauge
11 Expansion vessel
12 Pressure relief valve
13 Tundish
14 Automatic system bypass
15 Motorized 2-Port valve (DHW)
16 Automatic air vent
17 DHW cylinder
18 Motorized 2-Port valve (SH)
19 Additional circulating pump
20 Thermostatic radiator valve
1
10
8 9
7
2 3
5
3
2 3
11
20
16
17
18
15
12
13
14
Optional
3 3
19
4
6
3
2 3
1
6a
IMPORTANT
If the external volumiser arrangement
is used, (see item 6a below) then
item 6 in the adjacent schematic will
not be required.
Revision Details:
1.4 25/04/22 Approved