Pre-Installation
Greenstar 8000 Style – 6720883864 (2019/02)
12
Fig. 5
Curves for the expansion vessel
1
Pre-charge pressure 0.5 bar (minimum)
2
Pre-charge pressure 0.75 bar
3
Pre-charge pressure 1.0 bar (default setting)
4
Pre-charge pressure 1.2 bar
5
Pre-charge pressure 1.3 bar
T
Maximum operating temperature [ °C]
V
Total System Volume [l]
4.1.3
System layouts examples
Sealed primary system - Single central heating circuit:
Typical primary system example
Fig. 6
Single central heating circuit example
[1]
Appliance
Sealed primary system - 2 x central heating zones:
• Requirement for new builds if the floor area of a property is over
150m
2
.
Fig. 7
Separated heating zones
[1]
Appliance
[2]
Zone valves
4.1.4
System fill
Filling primary sealed systems
NOTICE:
Filling the primary sealed system
The system must not be filled with salt based softened water.
▶ Ensure the primary water filling point uses an untreated cold water
connection from the mains supply, before a water softener.
• Filling the system must comply with one of the following methods
shown.
• The filling point must be at low level and must never be a permanent
connection to the mains water supply.
• Filling loops must be WRAS approved.
• If the external filling link is sited away from the appliance, then a
pressure gauge should be installed at the filling point.
Integral filling link
• An optional filling link accessory is available to fill the system, (
section “Integral keyless filling link” on page 40).
External filling loop
Fig. 8
External filling loop system fill example
[1]
Cold mains inlet pipe
[2]
Stop valve
[3]
Check valve
[4]
Test point
[5]
Hose union
[6]
Central heating flow pipe
0010016558-002
A
B
4
5
3
2
1
30
40
50
60
70
80
90
0
100
200
300
400
500
600 700
T[°C]
V[l]
1
0010021227-001
1
2
2
0010021228-001
0010012942-001
6
2
2
4
3
3
1
5
