Alpha Alpha CD13R User manual

User's
Instructions
Alpha CD13R, 18R and 24R
Wall Mounted, Fan Assisted, Room Sealed, Gas Fired,
High Efficiency Condensing Regular Boiler Range
Alpha CD13R G.C. No. 41 532 05
Alpha CD18R G.C. No. 41 532 03
Alpha CD24R G.C. No. 41 532 04
British Gas
Service Listed
For use with Natural Gas only
Leave these instructions with the User
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
For Technical help or for Service call ...
ALPHA HELPLINE Tel: [phone]
website:www.alpha-innovation.co.uk

2Alpha CD13R, 18R, 24R
The Alpha CD Regular range of high efficiency condensing boilers are wall mounted, fan assisted room-sealed boilers.
The boiler CD13R is suitable for central heating loads of between 5.4 and 13.1 kW (18 400 and 44 700 Btu/h).
The boiler CD18R is suitable for central heating loads of between 5.4 and 19.6 kW (18 400 and 66 800 Btu/h).
The boiler CD24R is suitable for central heating loads of between 6.5 and 25.6 kW (22 200 and 87 300 Btu/h).
The boiler will provide central heating (as required) during the 'on' times set on your clock (if fitted).
Fig. 1
3 BOILER CONTROLS
2 USER CONTROLS
1 DESCRIPTION
1. CENTRAL HEATING THERMOSTAT
This thermostat controls the temperature of the water leaving the boiler for the heating system. For maximum efficiency from the
boilerthethermostatshouldbeleftatnumber5or6asshowninFig.1..Iflowerheatingtemperaturesarerequired,turnthethermostat
anti-clockwise. If higher heating temperatures are required, turn the thermostat clockwise.
2. SELECTOR SWITCH
This control is used to turn the boiler on and off or to 'reset' the ignition sequence or to set to frost thermostat only. The internal
clock and frost thermostat will not operate when the switch is in the vertical position, i.e. 'Off' position (0).
3. INDICATOR NEONS
When neons A (red), B (red), C (yellow), D (green) are illuminated, the following conditions apply:-
Neon
DIlluminated continuously - Electricity supply to the boiler is on.
CIlluminated continuously - Burner is alight.
AFlashing on and off - Temperature sensor fault, contact your Service Engineer.
BFlashingonandoff-Overheatthermostathasoperated.Rotateselectorswitchtotheresetposition(3)toreset.Ifthiscontinues
to happen, contact yor Service Engineer.
BIlluminated continuously - 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.
Aand BFlashing on and off at the same time - Blocked flue or fan fault, contact your Service Engineer.
AFlashing and BIlluminated continuously - Pump fault or restricted flow.
AIlluminated continuously and Bflashing - PCB or flame sensor fault.
Aand Billuminated continuously - No flow or air present.
A, B and Cflashing on and off at the same time - Contact your Service Engineer.
Note: Do not hold the selector switch in the reset position (3) for more than 2 to 3 seconds.
4. OVERHEAT THERMOSTAT
This thermostat automatically switches the boiler off in the unlikely event of the boiler overheating. When the thermostat operates,
the red neon (B) flashes on and off. Rotate the selector switch to the reset position (3) and the boiler will relight.
If this continually happens, contact your Service Engineer.
5. FROST THERMOSTAT
The boiler has a built-in frost thermostat, which automatically operates the boiler if the water temperature falls below 8°C,
providing the electrical supply is on and the selector switch is set to position (1) 'Frost' or position (2) 'ON'.
Central
Heating Thermostat
Frost
Thermostat position
Selector Switch
0
Indicator
Neons
1
2
3
1
2
3
4
5
6
7
8
9
RESET
ON
OFF FROST
A
D
B
C
SELECTOR THERMOSTAT
CD18R

3
Alpha CD13R, 18R, 24R
4 LIGHTING INSTRUCTIONS
Refer to Fig. 1 for boiler controls.
1. Ensure the following:-
a. Electrical supply to the boiler is off.
b. All heating controls and thermostats are set to OFF or minimum position.
c. The boiler gas isolation valve is in the open position (slot on the spindle in line with the valves i.e. ).
d. The gas supply is on at the mains.
e. The heating system is filled and vented.
2. Switch on the electrical supply to the boiler.
3. Set any room thermostats to maximum and ensure that any clock is in an 'on' position.
4. Set the selector switch to position (2) and turn the heating thermostat fully clockwise. The main burner will light and the
boiler will provide central heating.
5. Set the boiler thermostat, clock, external controls i.e. room thermostat to your chosen settings and the boiler is ready to operate.
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
8°C the built-in frost thermostat will operate the boiler automatically until the temperature of the water in the heating system has
been raised.
To turn the boiler off for longer periods:- Switch off the electrical supply to the boiler. If required, all supplies i.e. gas, water
and electricity may be turned off at the mains. If there is any possibility of the boiler being left during frost conditions, then the
boiler and system should be drained and a label attached to the boiler drawing attention that the system has been drained. If
this is required, contact your Service Engineer.
5 BOILER OPERATION
The operating sequence of the boiler is controlled by the selector switch on the control panel.
Setting the selector switch to position (2) the boiler will operate to provide central heating.
When the selector is set to central heating, it will respond to a demand for heat in the following sequence:-
a. The external pump will start, the fan will operate and the main burner will light.
b. The output of the burner is automatically controlled to suit the system demand.
c. When the temperature of the system water in the boiler reaches that set by the thermostat or the room thermostat is
satisfied, the main burner is turned off and the fan stops after 50 seconds. The pump will continue to run to remove any
residual heat from the boiler.
6 IMPORTANT NOTES
1. BOILER LOCATION
Always ensure the following clearances are available around the casing of the boiler:-
Top: 235 mm, Bottom: 250 mm, Each side: 5 mm, Front: 450 mm
Donot storeany otherarticles inthe cupboardcontaining theboiler andnever placeany clothingor combustiblematerial onor near
the boiler or flue pipe.
2. FLUE TERMINAL
The terminal on the outside wall must not be allowed to be obstructed. If it is damaged, in any way, turn the boiler off and
contact your Service Engineer.
Note: The Alpha CD boilers are high efficiency condensing boilers and when operating vapour will be emitted from the terminal.
This is safe and quite normal.
3. MAINS FAILURE
In the event of an electrical supply failure the boiler will not operate. When the supply is restored, the boiler will return to normal
operation. Remember to reset the clock, if fitted, when the supply is restored.
4. CLEANING
Use only a damp cloth and mild detergent to clean the boiler outer casing. Do not use abrasive cleaners.
5. SERVICING
To maintain efficient and safe operation of your boiler, routine annual servicing is essential.
For advice on servicing contact:- The Alpha Helpline: 0870 3001964.
6. 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 flames. Contact your local Gas Region immediately.

7. ELECTRICAL SUPPLY
The boiler requires a 230/240 V ~ 50 Hz supply, fused at 3 A if a 13 A 3-pin plug is used or a 5 A fuse if any other type of plug is used.
To connect a plug:-
The colour of the wires in the mains lead of the boiler may not correspond with the coloured markings identifying the terminals
in your plug. In this case proceed as follows:-
The wire coloured green and yellow must be connected to the terminal in the plug that is marked with the letter E, or by the
earth symbol , or coloured green or green and yellow.
The blue wire must be connected to the terminal which is marked with either the letter Nor coloured black.
The brown wire must be connected to the terminal which is marked with the letter Lor coloured red.
THE APPLIANCE MUST BE EARTHED.
7 GAS SAFETY REGULATIONS
If you experience a problem of no heating, try to solve the problem by following the simple checks below before calling out a
service engineer.
If applicable, pull the controls panel cover forward and down to gain access to the controls.
8 FAULT FINDING FOR THE USER
Current Gas Safety (Installation and Use) Regulations:-
It is the law that all gas appliances are installed and serviced by a competent person, i.e. CORGI registered personnel. Failure
to install or service appliances correctly could lead to prosecution. It is in your interest and that of safety to ensure compliance
with the law. The manufacturer's instructions must not be taken in any way as over-riding statutory obligations.
The Benchmark Checklist must be fully completed by the installer on installation and commissioning of the boiler. The
Benchmark Checklist is shown in Section 12, page 34, of the Installation and Servicing instructions. All CORGI registered
installers carry a CORGI ID card and have a registration number. Both should be recorded in your central heating Checklist.
You can check your installer is CORGI registered by calling CORGI on 01256 372300.
Leaflet compiled and designed by Publications 2000 - Tel: [phone]/D229
Part No. 1.022776
These instructions have been carefully prepared but we reserve the right to
alter the specification at any time in the interest of product improvement.
© Alpha Therm Limited 2008.
Alpha Therm Limited.
Nepicar House, London Road, Wrotham Heath,
Sevenoaks, Kent TN15 7RS
Tel: [phone]
email: [email protected]
website: www.alpha-innovation.co.uk
A
B
C
- Check that the electrical supply to the boiler is on. If so
- Check that all controls are calling for heat, i.e. room thermostat, clock. If so
- Check that the gas supply is on. If the light continues to come on after resetting
Ring the
Alpha Helpline Service
Tel: [phone]
You will be asked
the Serial No. of your
boiler when you ring.
The Serial No. is located
on the underside of
the boiler.
If any of these lights are on or flashing,
rotate the selector switch to RESET (position 3)
See C Turn to
maximum
Two channel clock
(if fitted)
Turn selector to (position 2)ON
If this light is not on
See A
This light should illuminate
If not - See B
0
1
2
3
1
2
3
4
5
6
7
8
9
RESET
ON
OFF FROST
A
D
B
C
SELECTOR THERMOSTAT
CD18R