Section 10: Sealed Systems
Page 36
10.1 Sealed System Requirements
9
10
8
7
6 5
1
3
4
11
12
2
Mains supply
Figure 10-1:
Sealed System heating components
10 Sealed Systems
Table 10-2:
Sealed System heating components key
Key
Description
1
Automatic air vent
2
HW/HTG zone valves
3
Thermostatic radiator valve
4
Automatic bypass
5
Double check valve
6
Removable filling loop
7
Tundish
8
Pressure relief valve
9
Pressure gauge
10
Expansion vessel
11
Drain point
12
Extra system volume
All Grant Aerona³ heat pumps must be used with sealed systems
complying with the requirements of BS EN 12828:2003, BS EN
12831:2003 ad BS EN 14336:2004.
The system must be provided with the following items:
•
Diaphragm expansion vessel complying with BS EN
13831:2007
•
Pressure gauge
•
Pressure relief (safety) valve
•
Approved method for filling the system
Expansion vessel
The expansion vessel should be fitted in the return pipework
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.
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.
NOTE
!
This is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular
system. It is up to the system designer to determine the necessary components for and configuration of the particular system
being designed.
Summary of Contents for Aerona3 Series
Page 57: ...Section 13 Flue System and Air Supply Page 57 Figure 13 8 Flue clearances...
Page 77: ...Section 19 Spare Parts Page 77 Figure 19 4 15 21kW baffles Figure 19 5 21 26kW baffles...
Page 84: ...Appendix A Page 84 Appendix A...
Page 85: ...Appendix A Page 85...
Page 86: ...Appendix A Page 86...
Page 87: ...Appendix A Page 87...
