2
Alpha E-Tec 28 and 33
Please read these instructions carefully before operating your boiler.
The Alpha E-Tec 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 range are designed to work with most central heating controls however we recommend the Alpha Comfort or
Easy-Stat standard controls or 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.
In addition all E-Tec models 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. Hot water
will always take priority over the central heating whenever a hot tap is opened.
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 the Mode button (item 1 in Fig. 1) the Standby or On mode can be selected, or press and hold the Mode button
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
features are still active.
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 Mode button (item 1 in
Fig. 1).
Summer setting - The boiler will only provide hot water when a tap is turned on and the central heating will not activate even
if requested by external controls (frost protection and pump cycle are still active).
Winter setting - The boiler will operate in both heating and hot water. The heating will activate depending on the time and
temperature from any heating controls fitted. Hot water will always take priority over heating when a hot outlet tap is opened.
The boiler controls are located on the control panel.Make sure the heating system is filled and the needle on the pressure
gauge (item 8 in Fig. 1) is in the green band when cold. If incorrect refer to Section 4.
1 - Off/Stand-by/Summer/Winter button
2 - Information button
3 - Reset Button
4 - Reduce DHW set temperature
5 - Increase DHW set temperature
6 - Increase heating system set temperature
7 - Reduce heating system set temperature
8 - Heating system pressure gauge
9 - Domestic hot water active
10 - Remote Climatic controller fitted
11 - Boiler fired and power level
12 - External weather probe fitted
13 - Active solar supply (pre-heated inlet)
14 - Central heating active
15 - Central heating temperature indicator
16 - Boiler in Stand-by mode
17 - Winter mode – heating and hot water
18 - Summer mode – DHW only
19 - Temperature/info/code - display
20 - Not used on this model
21 - Boiler locked - reset required
22 - DHW temperature indicator
4
5
6
7
8
1
2
3
RESET BOOST
°C
RESET BOOST
°C
9
10
11
12
13
14
15
16
17
18
19
20
21
22
RESET
INFO