Alpha CD24C, CD32C user Instructions
Simplied user Instructions
Alpha CD24C/32C
Range of Wall Mounted, Fan Assisted, Room Sealed, Gas Fired, High Efciency Condensing Combination Boilers
Alpha CD24C G.C. No. 47 532 19 • Alpha CD32C G.C. No. 47 532 21
For Technical help or for Service call
ALPHA HELPLINE Tel: 0870 3001964
Nepicar House, London Road, Wrotham Heath, Sevenoaks, Kent TN15 7RS
USER CONTROLS and FAULT FINDING
If you experience a problem of no heating and, if applicable, no hot water, try to solve the problem by following the simple checks below
before calling the Alpha Helpline.
Pull the controls panel cover forward and down to gain access to the controls.
FIG 1
Is needle within or
above the green band?
If not - see A
System Pressure Gauge Selector Switch Central Heating
Indicator Neons Domestic Hot Water
Thermostat
If any of these lights are on or ashing, rotate
the selector switch to RESET (position 3)
See D
Thermostat
If this Light is not on
Open a hot tap fully and this light should illuminate
Clock (if tted)
See B
If no hot water - see E
Turn to maximum
Turn selector to
(position 1)
Then turn selector to (position 2)
This light should illuminate
If not - see C
A – Where applicable, refer to the label on the inside of the hinged cover for
guidance on repressurising the system. Or contact your installer. Or
B – Check that the electrical supply to the boiler is on. If so
C – Check that all the controls are calling for heat, i.e. room thermostat, clock. If so
D – Check that the gas supply is on. If the light continues to come on after resetting
E – Contact the Alpha Helpline
Ring the Alpha Helpline
Service Tel: 0870
3001964
You will be asked the
Serial No. of your boiler
when you ring.
The Serial No. of the
boiler is underneath the
control panel.
INDICATOR NEONS
When neons A (red), B (red), C (yellow), D (green) are illuminated, the following conditions apply (see table below):-
NEON INDICATOR
Continuous Flashing
D - Electricity supply to the boiler is on.
C - Burner is alight.
- A Temperature sensor fault. Contact your Service Engineer.
CONDITION
- B
B -
- A and B
B A Pump fault or restricted ow.
* Do not hold the selector switch in the reset position (3) for more than 2 to 3 seconds.
BOILER CONTROLS
1. CENTRAL HEATING THERMOSTAT
This thermostat controls the temperature of the water leaving
the boiler for the heating system. For maximum efciency the
thermostat should be left at number 5 or 6. If lower heating
temperatures are required, turn the thermostat anti-clockwise. If
higher temperatures are required, turn the thermostat 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 anticlockwise.
3. SELECTOR SWITCH
This control allows the boiler to provide central heating and hot
water or hot water only.
Note: The internal clock and frost thermostat will not operate
when the switch is in the vertical position, i.e. ‘Off ’ position (0).
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, i.e. lower red area, refer
to the label on the inside of the hinged control panel cover for
guidance on re-pressurising the system. Or contact your Installer to
have the system checked and pressurised.
Overheat thermostat has operated. Rotate selector switch to the reset position (3)*. If this
continues to happen, contact your Service Engineer.
Burner has failed to light. Rotate selector switch to the reset position (3)* and the ignition sequence
will restart after a delay of about 30 seconds.
Flashing at the same time: Blocked ue or fan fault. Contact your Service Engineer
Flashing alternately: System pressure is very low and re-pressurisation is required.
LIGHTING INSTRUCTIONS
To turn the central heating off i.e. in Summer: Set the
selector switch to position (1).
To turn the boiler off for short periods: Set the selector switch
to position (1).
Note: In this position the pump will automatically operate
for 5 minutes in every 24 hours. If the water temperature falls
below 4°C the built-in frost thermostat will operate the boiler
automatically until the temperature of the water in the heating
system has been raised.
BOILER OPERATION
With the selector switch set to (hot water only) the boiler will
only operate to provide domestic hot water, ideal for Summer use
when central heating is not required.
Setting the selector switch to (central heating and hot
water) the boiler will operate to provide both central heating and
hot water.
IMPORTANT NOTES
1. CLEANING
Use only a damp cloth and mild detergent to clean the boiler outer
casing. Do not use abrasive cleaners.
2. SERVICING
To maintain efcient and safe operation of your boiler, routine
annual servicing is essential.
For advice on servicing contact:- The Alpha Helpline: 0870 3001964.
5. PRESSURE RELIEF VALVES
If the central heating or hot water system overheats and steam or
water is discharged from the pipe connected to the valve, turn the
boiler off and contact your Service Engineer. Your Installer should
have told you where this pipe terminates.
3 GAS LEAK
If a fault or gas leak is suspected, turn off the gas supply. Do not
touch any electrical switches, do not smoke and extinguish all
naked ames. Contact your local Gas Region immediately.
6. FROST THERMOSTAT
The boiler has a built-in frost thermostat, which automatically
operates the boiler if the water temperature falls below 4°C,
providing the electrical supply is on and the selector switch is set
to (1) or (2).
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