2
Alpha E-Tec 15, 20, 25R
Please read these instructions carefully before operating your boiler.
The Alpha E-Tec R range of high efficiency condensing boilers incorporate the latest technology in boiler design. With
improved burner efficiency and reduced electrical consumption together with high quality and reliability.
The boiler output will automatically adjust according to the requirements of the system.
The E-Tec R range of boilers are designed to work with most central heating controls however we recommend the enhanced
Alpha Climatic boiler energy manager further improving the system efficiency by varying the system temperature depending
on the room temperature and heat losses - to be used only with the Alpha Diverter kit if a DHW cylinder is used.
In addition all E-Tec R boilers feature optional connections for an outside sensor to enable the boilers built in weather
compensation feature.
The boilers will provide central heating when required during the on times as set according to the controls fitted.
Refer to Section 2 of the Installation and Servicing document for the meaning of the information symbols.
Fig. 1
2 OPERATING THE BOILER
1 INTRODUCTION
Switch the boiler on at the mains supply socket switch. The boiler will be in either 'Standby' or 'On' mode.
By pressing button 1 (see Fig. 1) the Standby or On mode can be selected, or press and hold the button 1 for eight seconds
to turn the boiler off.
Standby - In this mode the boiler will not provide hot water or central heating, but frost protection and pump circulation (if the
pump has been connected to the boiler terminals) features are still active and frost protection enabled.
Off - In this mode there is electrical power to the boiler but the boiler will not function in any condition.
On - In this mode the boiler can be switched between 'Summer' or 'Winter' settings by pressing the button 2 (see Fig. 1).
The boiler can be used by children at least 8 years old as well as by persons with reduced physical, sensory or
mental capabilities, lack of experience or required knowledge providing that they are under surveillance, or after
they have been instructed relating to the safe use and have understood the potential dangers. Children must not
play with the appliance. Cleaning and maintenance destined to be performed by the user cannot be carried out by
unsupervised children.
The boiler controls are located on the control panel.
Make sure the heating system is filled.
12
3
4
56
21
RESET
BOOST
bar
°C
x100rpm
8910
11 12
13
14
151617181920
RESET
INFO
RESET
BOOST
bar
°C
x100rpm
1 On-Off/Standby button
2 Summer/Winter button
3 Reset button
4 Information button
5 Domestic hot water temperature
control knob with Alpha diverter kit or
DHW relay fitted
6 Central heating water temperature
control knob
7 N/A
8 DHW mode active
9 Boiler locked, reset via 'RESET' button
10 Flame present symbol and relative
power scale
11 Operating in summer mode
12 Operating in winter mode
13 Central heating mode active
14 Temperature indicator, boiler info and
error codes
15 Boiler in Stand-by mode
16 Climatic control fitted
17 Solar function (not used on this model)
18 Functioning with external temperature probe
active (optional)
19 Boiler connected to remote control (optional)
20 FlowSmart option (not used on this model)
21 Optional boiler controls (if fitted)
If the boiler is locked out and an error code is shown on the display, the RESET
button can be pressed to try and clear the fault. If the fault still occurs after pressing
RESET, then contact an approved engineer or Alpha service support department.
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