Water Treatment; Filling The Appliance And Adding Inhibitor; Converted To Sealed Primary System; Starting The Appliance - Worcester Greenstar 8000 Life GR8300iW 30 R Installation And Maintenance Instructions Manual

Commissioning
6.2

Water treatment

Primary system flushing (Central Heating)
Ensure that the system has been cleaned:
• Following the guidance of BS 7593:
– Code of Practice for treatment of water in hot water central
heating systems.
• Overview available in Pre-installation, Cleaning primary systems
section.
Inhibitor (Central Heating):
Add a suitable inhibitor that is compatible with aluminium (or combined
inhibitor/anti-freeze, if the system is exposed to freezing conditions), to
the heating system in accordance with the DWTA code of practice and
manufacturer's guidelines.
The pH value of the system water must be between 6.5 and 8 or the
appliance warranty will be invalidated.
The inhibitor or combined inhibitor/anti-freeze must not cause damage
to the materials within the appliance (aluminium, mild steel, stainless
steel, copper and brass) and any other materials/components within the
system.
▶ Record the date when the inhibitor was added to the system on the
guarantee card.
▶ The concentration level of inhibitor in the system should be checked
every 12 months or sooner if system content is lost.
NOTICE:
Sealing agents
Normally the addition of sealing agents to the system water is not
permitted as this can cause problems with deposits left in the heat
exchanger.
▶ In cases where all attempts to find a system micro leak have failed,
Worcester, Bosch Group supports the use of Fernox F4 leak sealer.
6.2.1

Filling the appliance and adding Inhibitor

Filling the system - Open Vent systems
NOTICE:
▶ Salt based softened water must not be used to fill the central heating
system.
▶ Check drain cocks and manual air vents are closed and all radiator
valves are open. Add a suitable inhibitor or combined inhibitor/anti-
freeze, if the system is exposed to freezing conditions, to the heating
system water in accordance with the manufacturers instructions.
▶ Turn on the water main to the system header and allow the system fill.
▶ Vent the appliance using the manual air vent (on flow pipe) ( Fig. 3,
pos. 9) taking care to protect any electrical connection.
▶ Vent all radiators and the primary side of the hot water cylinder,
tighten when completed and check the system for any leaks and
correct if required.
38
6.2.2

Converted to sealed primary system

Filling the system - Sealed systems
NOTICE:
▶ Salt based softened water must not be used to fill the central heating
system.
▶ Check drain cocks and manual air vents are closed and all radiator
valves are open. Add a suitable inhibitor or combined inhibitor/anti-
freeze, if the system is exposed to freezing conditions, to the heating
system water in accordance with the manufacturers instructions.
▶ Turn on the water main and open the system valves.
▶ Fill the system to between 1 and 1.5 bar via a WRAS approved filling
loop.
▶ The Automatic Air Vent will release any air trapped in the appliance.
▶ Manually vent all radiators, tighten when completed and check the
system for any leaks and correct if required.
▶ Top up the system pressure if the pressure drops below 1 bar.
▶ Isolate and remove filling loop connections to the system.
6.3

Starting the appliance

NOTICE:
Damage to appliance or system!
Running the appliance:
▶ Never run the appliance when the appliance/system is empty or
partially filled.
6.3.1

Control panel overview

7
eco
6
5
Fig. 58 Control panel
[1] Display
 and  keys: To navigate through menus and increase/decrease
[2]
settings
[3] d key: Return/back
[4] OK key: Save settings, Chimney sweeper key (Service Engineer
function): press 5 seconds for chimney sweeper mode
[5] eco key: Hot water preheat selection (not applicable for regular
appliances)
[6] Hot water key: Adjusting the hot water temperature (not
applicable for regular appliances)
[7] Heating key: Heating mode on, set the maximum flow
temperature
Greenstar 8000 Life – 6720883866 (2019/04)
1
reset
ok
5 sec
3
4
0010021505-001
2