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Commissioning
Mid point domestic hot water temperature
The mid point sets the maximum temperature for the cylinder to 50 °C.
The standard display will show the current appliance temperature [1].
▶ Press both the hot water adjustment buttons [2].
The display will change to the mid point temperature for the cylinder.
▶ Press the OK button to confirm value selection, the display will also
return to main screen.
-or-
▶ Wait 4 seconds for auto confirm and the display will return main
screen.
1
2
Eco
Fig. 58 Setting economic domestic hot water temperature
6.6.6
Optional integral diver valve kit fitted:
Eco/Preheat mode activation
• Eco mode is an energy saving feature which disables the Preheat
function. Eco is enabled by default, during the initial appliance start
up and Eco is displayed.
– During the OFF periods set by the time control, the appliance will
heat the cylinder If the temperature is approximately 10 °C below
the setpoint.
• Preheat mode, the appliance heats the cylinder more frequently.
This tops up the cylinder temperature for quicker heat up times, this
is useful for large/longer demand periods during the hot water ON
periods.
– During the ON periods set by the time control, the appliance will
heat the cylinder If the temperature is approximately 5 °C below
the setpoint.
▶ Press the eco button (approximately 1 second) to manually switch
between eco [1] and preheat [2] modes.
Depending on which mode the appliance is in, pressing the eco
button (approximately 1 second) switches from one mode to the
other.
1
Eco
Fig. 59 Eco/Preheat manual switching
48
3
Wait 4 seconds
for auto confirm
2
Preheat
6.6.7
Toggle basic adjust mode
Basic adjust mode locks key functions preventing accidental adjustment
of the heating flow temperature, Eco mode and service functionality.
When in basic adjust mode, a message appears on the display when a
disabled button is pressed.
Only the following functions are available whilst in basic adjust mode:
• Domestic hot water temperature adjustment
• Info menu button
• Reset button
To enable /disable the basic adjust mode operation of the appliance
(domestic hot water adjustment only when basic mode active):
▶ Press and hold for 5 seconds the central heating increase [1] and
domestic hot water decrease [2] adjustment buttons to toggle
activation.
1
Fig. 60 Basic adjust mode activation toggle
6.6.8
Hand over
▶ Complete the Benchmark Gas Boiler Commissioning Checklist at the
back of this manual.
▶ Open the facia flap by hinging the flap downwards using the curved
hand hold in the centre of the flap.
▶ Set up the controls and show the customer how to operate all the
controls shown in the User Guide plus any external controls.
▶ Instruct the customer on:
– the need to re-pressurise the appliance occasionally and the
pressure expected at the pressure gauge.
– location of the filling loop and system pressure gauge.
– the use of the filling loop and how to re-pressurise the system.
– how to use the TRVs.
– how to reset the appliance.
– if the basic adjust mode is enabled.
▶ Show the customer the fault finding information in the User guide.
▶ Show the customer where the serial number/appliance information
is when they call in with a problem (Benchmark checklist at the rear
of the manual).
▶ Give the customer details of how to contact the installer/gas
emergency numbers.
▶ Show the customer how to safely isolate the appliance.
▶ Advise the customer where they can find information on the
Worcester, Bosch Group website www.worcester-bosch.co.uk.
▶ Advise the customer that the varying external temperatures will
affect the output of the appliance, especially the DHW.
▶ Ensure that the User Guide and Installation, Commissioning and
Service manual, with the Benchmark checklist and service record, is
left with the appliance or homeowner.
▶ If the appliance is unused and exposed to freezing conditions, shut
off all the mains supplies and drain the system and appliance, label
accordingly.
▶ Show the customer the location of the condensate pipe run for
external/unheated areas that maybe at risk of prolonged cold
temperatures.
Greenstar i System
2
- 6 720 806 945 (2015/07)
ErP
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