Adjusting The Operating Pressure Of The Heating; System; Starting The Appliance; Control Panel Overview - Worcester GR8700iW 35 C Installation And Maintenance Instructions Manual

Commissioning
The pressure gauge and pressure information within the control panel
display menu, will show a different reading. This is due to the accuracy of
the digital sensor and is normal. During installation refer to the reading
on the pressure gauge
Integral keyless filling link
Locate the filling link and follow the instructions for re-pressurising the

system.

Fig. 59 Enable access to keyless filling link
▶ Re-pressurise the system.
– Pull the lever [1] down to start the filling process.
– The pressure indicator on the pressure display will start to move
towards the green bar.
▶ When the pressure indicator reaches the middle of the green bar [2]
and the pressure is between 1 and 1.5 bar
– Release the lever [1] to stop the filling process.
▶ Top up the system pressure, if as a result of the air bleeding the
pressure drops off.
1
Fig. 60
If the indicator is on the right hand side red pressure zone as a result of
over filling:
▶ Bleed one radiator until the pressure indicator returns to the green
bar.
6.2.2 Adjusting the operating pressure of the heating system
Display on the pressure gauge
1 bar Minimum charge pressure (when system is cold)
1 - 1.5 bar Optimal charge pressure
3 bar Maximum charge pressure at maximum heating
water temperature must not be exceeded (pressure
relief valve opens).
Table 15
If the indicator is below 1 bar when the system is cold:
▶ Top up the water until the indicator is between 1 bar and 1.5 bar
again.
40
0010023634-001
1
2
0010022968-001
If pressure is not being maintained:
▶ Check tightness of expansion vessel and heating 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
6
5
Fig. 61 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: press 5 seconds for
chimney sweeper mode
[5] Menu key
[6] Hot water key: Hot water mode on/off, adjusting the hot water
temperature
[7] Heating key: Heating mode on/off, set the maximum flow
temperature
[8] Burner display: Illuminates when the burner is alight.
See the operating instructions for a description of the user menus.
Greenstar 8000 Style – 6720883864 (2019/02)
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1
2
3
4
0010018565-001