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Fig. 17. Facia.
3
2
1
1
Appliance identification sticker
2
Master switch
3
Indicator lamp for power on
4
Temperature control for CH flow
5
Setting button (also refered to as 'Chimney Sweep' button)
6
Reset button
7
Digital display
8
Service button
Switching on
Turn on the power switch to 'I'. The green LED will light.
NOTE: The first time the appliance operates (and whenever the
electricity supply is re-established) it will run at low rate for 15
minutes to check the siphon.
The display will show
The boiler will then revert to normal operation.
4
5
6
7
8
9 10
11
9
10
11
12
Switching on the Heating
Turn on the heating temperature control knob to E.
The burner and the red LED will light.
The temperature of the water leaving the boiler is shown on the
display.
NOTE: Position 'E' can be set as the maximum adjustable
temperature. Refer to 'Central Heating Flow Temperature'.
There should be a dynamic pressure of 20 mb (Natural Gas) at
the inlet to the appliance equivalent to about 18.5-19.0 mb at
the inlet to the gas valve.
Run the system in the heating mode and check that each
radiator heats up evenly, venting as necessary.
Balance the system to achieve a differential across the system of
20°c. There is no need for an external system bypass.
If, after conversion, the appliance is operating on LPG then a
dynamic pressure of 37mbar at the inlet to the appliance
equivalent to aout 34.5-35mbar at the inlet to the gas valve.
16
12
'ECO' button
Indicator lamp for burner on
Temperature control for DHW on ZWRB
Pressure guage
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