Grant Aerona3 HPID12R32, Installation And Servicing Instructions

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section 4: sealed system Page 16
4.1 sealed system requirements
2
1
2
3
4
5 6
7
8
9
15
Static head of system
10 11
10 11
13
14
12
16
SCALE:
REVISION:
DRAWN BY:
DATE:
DRAWING TITLE: DRAWING No:
SCALED TO FIT
1.0
SIMON VEITCH
23/08/2018
ASHP with volumiser N/A
figure 4-1: Sealed System heating components
4 sealed systems
table 4-2: Sealed System heating components key
Key Description
1 Expansion vessel
2 Pressure gauge
3 Pressure relief valve
4 Tundish
5 Removable filling loop
6 Double check valve
7 Automatic air vent
8 Thermostatic radiator valve
9 Automatic bypass
10 Flexible hose
11 Isolation valve
12 Volumiser
13 Motorised 2-port valves
14
Optional additional circulating pump
(refer to Section 8.3.7)
15 Drain point
16 Bypass (HPID12R32 only)
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.
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 !
Optional
Highest point of the primary circuit
Centre of expansion vessel