Filling The Appliance And Adding Inhibitor; Starting The Appliance; Control Panel Overview; Turning On The Appliance - Worcester Greenstar 4000 Installation And Maintenance Instructions Manual

6.2.1

Filling the appliance and adding Inhibitor

Before pressurising the system.
The appliance integral expansion vessel is pre-charged to 0.75 bar
(equal to a static head of 7.5m (24.6ft)). A Schrader type valve is fitted
to the expansion vessel to allow for pressure adjustment if required.
▶ If an extra expansion vessel is fitted to the central heating system,
ensure that it is set to the same pressure as the appliance internal
expansion vessel, refer to separate instructions supplied with the
extra expansion vessel.
Filling the system - Sealed systems
NOTICE
▶ Salt based softened water must not be used to fill the central heating
system.
▶ Check that the 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 might be 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 or one of the filling link accessories.
– Refer to filling link accessory instructions for operation and use.
▶ The Automatic Air Vent will release any air trapped in the appliance.
▶ Manually vent all radiators, tighten the vent screws when completed
▶ Check the system for any leaks and correct if required.
▶ Top up the system pressure if the pressure has dropped below 1 bar.
▶ Isolate and remove the filling loop connections to the system.
– Refer to Integrated filling link accessory instructions for any
further actions required after filling the system.
It is recommended that the mid position of the 3-way valve is used to fill/
drain the system.
For initial fill, the boiler automatically selects the mid-position when first
powered up. If power is not yet connected, the 3-way valve will also be in
the mid-position.
For future fills to set the 3-way valve to mid position:
▶ Service menu > Settings > Special function > 3-WV mid. pos.>
Yes.
The 3-way valve remains at the middle position for approx. 15 minutes.
▶ Ensure that any external zone valves are open, if installed.
▶ Fill/drain 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.
Greenstar 4000 – 6 720 891 161 (2020/09)
6.3.1

Control panel overview

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Fig. 61 Overview
[1] Burner display: Illuminates when the burner is alight.
[2] Display.
 and  buttons: To navigate through menus and increase/
[3]
decrease settings.
[4] d button: Return/back.
[5] ok button:
– Confirm/save settings.
– Chimney sweep button:
Press and hold for 5 seconds for chimney sweep mode.
– Toggle between Eco and preheat mode.
[6] Menu button.
[7] Hot water button: Hot water mode home screen.
[8] Heating button: Heating mode home screen.
See the operating instructions for a description of the user menus.
6.3.2

Turning on the appliance

▶ Turn on the appliance at the power supply isolator.
6.3.3

Operation

Appliance operation
▶ Refer to Operating Instructions for full details on setting the CH flow
temperature, DHW temperature set point and the operating settings
menu information.
Temperature adjustment overview
Central heating flow temperature adjustment.
With underfloor heating systems observe the maximum permissible flow
temperature.
▶ Press the ( key.
The set maximum flow temperature appears.
▶ Press the  or  keys to set the desired maximum flow temperature.
▶ The setting is saved automatically after two seconds.
Then the symbol is briefly displayed.
Commissioning
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