User's
0051
Instructions
Alpha InTec
26C, 30C, 34C, 24X, 28X, 30GS and 40GS
Range of Wall Mounted, Fan Assisted, Room Sealed,
Gas Fired, High Efficiency Condensing Combination Boilers
For Technical help or for Service call ...
ALPHA HELPLINE Tel: 0844 871 8764
website: www.alpha-innovation.co.uk
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
British Gas
Service Listed
For use with Natural Gas or Propane Gas (AS SUPPLIED)
Leave these instructions with the User
Please read these instructions carefully before operating your boiler.
1 INTRODUCTION
The Alpha InTec 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 InTec range are designed to work with most central heating controls however we recommend the Alpha Comfort
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.
InTec GS models have a flue gas heat recovery device fitted within the boiler casing. The device recycles heat recovered
from the flue exhaust gases which is used to pre-heat the incoming cold mains water supply before entering the boiler,
thereby reducing gas consumption and improving domestic hot water efficiency.
In addition all InTec 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.
2 OPERATING THE BOILER
The boiler controls are located on the control panel, for the InTec C and GS models this is located behind a drop down flap.
5 6
3
4
1 On-Off/Standby button
2 Summer/Winter button
3 Reset button
4 Information button
5 Domestic hot water temperature
selector switch
6 Central heating water temperature
selector switch
7 Heating system pressure gauge
8 DHW mode active
12
RESET
RESET
°C
bar
x100rpm
BOOST
INFO
9 Boiler locked does not require 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
1.5
1
0.5
0
CORRECT PRESSURE
WHEN COLD
721
2
2.5
3
bar
3.5
4
8 9 10
RESET
BOOST
11 12
°C
bar
x100rpm
16 Presence of external connected devices
17 Solar function active
18 Functioning with external temperature
probe active (optional)
19 Boiler connected to remote control
(optional)
20 FlowSmart option on (GS models only)
21 Optional boiler controls (if fitted)
13
14
151617181920
Fig. 1
Make sure the heating system is filled and the needle on the pressure gauge (item 7 in Fig. 1) is in the green band. If
incorrect refer to Section 5.
Switch the boiler on at the mains supply socket switch. The boiler will automatically go through a system purging operation
for 8 minutes; this is indicated by a count down on the display starting from 96. During this operation the pump will turn on
and off to help remove any air that may be trapped in the heating system. If the boiler has already been commissioned by the
installer then this operation can be terminated by pressing the reset button (item 3 in Fig. 1).
Note: It is important to allow this purging operation to function when the boiler has been initially installed to remove all the air
from the system.
After this purging operation the boiler will be in 'Standby' or 'On' mode.
By pressing the On-Off button (item 1 in Fig. 1) the Standby or On mode can be selected, or press and hold the On-Off
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.
Alpha InTec C, X and GS
2
On - In this mode the boiler can be switched between 'Summer' or 'Winter' settings by pressing the Summer/Winter button
9 8
7
6
5
4
3
2
1
0
(item 2 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.
3 HEATING AND HOT WATER TEMPERATURE
The temperature of the hot water to the taps can be adjusted by turning the hot water selector switch (item 5 in Fig. 1) to the
required value shown on the display in °C.
When a tap is opened the display will indicate the temperature of water in the boiler heating the tap water and not the actual
water temperature to the tap.
The temperature of the central heating water can be adjusted by turning the central heating selector switch (item 6 in Fig. 1).
When the heating is on the temperature of the water leaving the boiler to the radiators will be displayed.
If an external weather compensation probe is fitted, indicated by the
automatically vary the temperature of the water in the radiators and on mild day the radiators will not feel as hot as on a cold
day, this is normal and not a fault with the boiler or heating circuit. The room temperature will still be maintained as set by the
room thermostat.
When an external weather probe is fitted, the central heating selector switch (item 6 in Fig. 1) will no longer adjust the flow
temperature in °C, instead the display will show a scale of 1 to 9. Each number corresponds to a line on the graph in Fig 2
i.e. line 6 will give a flow temperature of 60°C when the external temperature is 10°C.
Note: This is the temperature of the water supplied to the radiators and not the desired room temperature. The time and
temperature will still be maintained according to the setting of the room thermostat.
symbol (item 18 in Fig. 1) in the display, it will
85 (50)
60 (40)
25 (25)
Flow temperature (°C)
27 15
5
External temperature (°C)
-510 0 -10 -1520
Setting 1 to 9 as selected using
the central heating selector switch
Flow temperature in brackets
ie. 25 to 50°C range when boiler
is used with a low temperature
system such as under floor heating
Fig. 2 - External weather compensation probe fitted
4 FILL AND PRESSURISE THE SYSTEM
InTec C and GS models are supplied with a factory fitted filling loop located underneath the boiler, (a flexible silver coloured
braided hose).
InTec X models should have a similar style filling loop fitted by the installer located in the pipework below the boiler.
Do not attempt to fill or pressurise the system while the system is hot - wait for it to cool.
The filling loop on the underside or underneath the boiler will have two tap connections at either end of the filling loop as
shown in Fig. 3 (C model shown with factory fitted filling loop).
These taps should normally be in the closed position 90° to the tap housing.
To fill or pressurise the system open one tap fully by turning it 90° anticlockwise in line with the tap housing. The second tap
should be opened a quarter of a turn and the water will start to refill the system (water should be heard filling the system).
You should see the pressure gauge (item 7 in Fig. 1) rise back up into the green area on the pressure gauge between 1 bar
and 1.5 bar pressure.
Once the pressure gauge is in the green area turn the taps back to the off position and the water will stop filling the system.
If you happen to fill the system too much and the pressure gauge is over the green area, just bleed water from a radiator until
Alpha InTec C, X and GS
3
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