Pre-Installation
Greenstar 8000 Life – 6720883866 (2019/04)
12
Converted to sealed primary system - 3-way valve, cylinder and
central heating zone:
Typical Y-Plan example
• The cylinder return must be the last connection on the common
return pipe to prevent reverse circulation.
Fig. 9 3-Way valve, cylinder and heating zone
[1] Appliance
[2] Zone valves
[3] Domestic hot water cylinder
[4] Circulation pump
[6] Sealed system kit
• Expansion vessel
• Pressure gauge
• 3 bar pressure relief valve
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.
External filling loop
Fig. 10 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
Top-up tank system fill
In situations where the cold mains pressure is not sufficient to pressurise
the system to between 1 and 1.5bar an alternative can be to use a top-up
tank.
Fig. 11 Top-up tank system fill example
[2] Stop valve
[3] Check valve
[6] Central heating flow pipe
[7] Top-up tank
[8] Automatic air vent
[9] Minimum height above the highest point of the system - 1000mm
(39 in)
4.2 Mains supply
4.2.1 Electrical supply
• Supply: 230V AC - 50 Hz
• This appliance must not be connected to a three phase supply.
• The wiring between the appliance and the electrical supply must
comply with the latest IET wiring regulations that apply to wiring a
fixed appliance.
• Type A RCDs must be employed where additional protection is
required.
• External 3fuse to BS1362.
• The appliance must be earthed.
• Cable: PVC insulated 0.75mm
2
(24 x 0.2mm) temperature rated to
90 °C, to BS EN50525.
• Any additional components that are connected to the appliance with
mains electrical supply must not have a separate supply.
• Additional equipment wired to the appliance must comply with the
latest IET wiring regulations.
• Appliance IP rating - IPX4D
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