Alpha 240, 280 User's Instructions
User's
Instructions
Alpha 240/280
Range of Wall Mounted, Fan Assisted, Room Sealed,
Gas Fired Combination Boilers
For Technical help or for Service call ...
ALPHA HELPLINE
Tel: 0870 3001964
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
Service Listed
Alpha 240P G.C. No. 47 532 09
0051
Leave these instructions with the User
Alpha 240E G.C. No. 47 532 06
Alpha 280E G.C. No. 47 532 08
Alpha 280P G.C. No. 47 532 12
For use with Natural Gas only
1 DESCRIPTION
The Alpha Range of boilers are wall mounted, fan assisted room-sealed combination boilers, providing both central heating and
domestic hot water at mains pressure.
The Alpha 240E and 240P boilers are suitable for central heating loads of between 9.3 and 23.3 kW (31 700 and 79 500 Btu/h). The
Alpha 280E and 280P boilers are suitable for central heating loads of between 9.3 and 28 kW (31 700 and 95 500 Btu/h).
The boilers will provide central heating (as required) during the 'on' times set on your clock (if fitted). Hot water is always
available whenever a hot tap is opened and takes priority over the central heating.
Note: The Alpha 240P and 280P use a permanent pilot for lighting the burner, and the Alpha 240E and 280E burner is lit
electronically.
2 USER CONTROLS
Pull the controls panel cover forward and down to gain access to the controls.
Alpha 240P and 280P
THERMOSTAT0THERMOSTAT SELECTOR GAS
0
Central
Heating
Thermostat
Domestic
Hot Water
Thermostat
Alpha 240E and Alpha 280E
Selector
Switch
Gas
Control
Pilot and Burner
Viewing Window
OFF
Indicator
Neons
Burner
Viewing
Window
2
3
1
04
bar
System
Pressure
Gauge
Clock
(if fitted)
2
Central
Heating
Thermostat
Alpha 240/280
THERMOSTAT0THERMOSTAT
0
Domestic
Hot Water
Thermostat
0
Selector
Switch
SELECTOR
Fig. 1
RESET
White
Reset
Button
RESET
Indicator
Neons
2
3
1
04
bar
Red
Reset
Button
Clock
(if fitted)
System
Pressure
Gauge
3 BOILER CONTROLS
1. CENTRAL HEATING THERMOSTAT
This thermostat controls the temperature of the water leaving the boiler for the heating system. For maximum output from the
radiators the thermostat should be left at maximum i.e. fully clockwise. If lower heating temperatures are required, turn the thermostat
anti-clockwise.
2. DOMESTIC HOT WATER THERMOSTAT
This thermostat controls the temperature of the domestic hot water leaving the boiler. For maximum hot water temperatures the
thermostat should be left at maximum i.e. fully clockwise. If lower temperatures are required, turn the thermostat anti-clockwise.
3. SELECTOR SWITCH
This control allows the boiler to provide central heating and hot water or hot water only.
Note: The mid position i.e. vertical, must not be selected. The internal clock and frost thermostat will not operate when the
switch is in the vertical position.
4. PRESSURE GAUGE
This indicates the central heating system pressure. It should always be within the green band when cold, increasing slightly
when hot.
If the pressure falls below the green band, ie lower red area, refer to the label on the front cover for guidance on re-pressurising
the system. Or contact your Installer to have the system checked and pressurised.
5. INDICATOR NEONS
When illuminated, the following conditions apply:-
Warning light (continuously on) - blocked flue or fan fault, contact your Service Engineer.
Overheat thermostat has operated - press white reset button (see Fig. 1) to reset (not applicable to Alpha 240P and 280P).
Electrical supply to the boiler is on.
Boiler is supplying hot water.
Boiler is supplying central heating.
When the red reset button ( ) is illuminated on the Alpha 240E and 280E it indicates that the burner has failed to light Press the red reset button (see Fig. 1) and the ignition sequence will restart (not applicable to Alpha 240P and 280P).
6. OVERHEAT THERMOSTAT
This thermostat automatically switches the boiler off in the unlikely event of the boiler overheating. When the thermostat
operates on the Alpha 240P/ 280P it turns the pilot off, when it operates on the 240E/280E the
white reset button (see Fig. 1) and the ignition sequence will restart automatically on the 240E/280E, for the 240P/280P the
pilot will have to be relit. Refer to the lighting instruction in section 4.
If this continually happens, contact your Service Engineer.
neon is illuminated. Press the
7. PRESSURE RELIEF VALVE
If the central heating system overheats and steam or water is discharged from the pipe connected to this valve, turn the boiler
off and contact your Service Engineer. Your Installer should have told you where this pipe terminates somewhere outside your
dwelling.
8. FROST THERMOSTAT
The boiler has a built-in frost thermostat, which automatically operates the boiler if the water temperature falls below 5°C,
providing the electrical supply neon
is illuminated and in the case of the Alpha 240P and 280P the pilot is alight.
Alpha 240/280
3
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