Alpha Alpha CD50, User Instructions, Page: 6 / 9

5 Alpha CD50
5. CLEANING
Use only a damp cloth and mild detergent to clean the boiler outer casing. Do not use abrasive cleaners.
6. 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.
7. 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.
8. 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 N or coloured black.
The brown wire must be connected to the terminal which is marked with the letter L or coloured red.
THE APPLIANCE MUST BE EARTHED.
8 GAS SAFETY REGULATIONS
9 CLOCK (if fitted)
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 Log Book must be fully completed by the installer on installation of the boiler. All CORGI registered
installers carry a CORGI ID card and have a registration number. Both should be recorded in your central heating Log
Book. You can check your installer is CORGI registered by calling CORGI on 01256 372300.
Fig. 2
The clock allows you to set the times at which the boiler will operate to provide central heating. It does not affect the supply of
domestic hot water, which is always available whatever the setting of the clock.
1. TO SET THE TIME
Turn the outer dial clockwise to set the clock hands to
the correct time.
(Ensure the time indicator corresponds with the correct
time on the 24hr dial as shown in Fig. 2,
e.g. 3.00pm = 15 not 3).
NOTE: Do not rotate the dial anti-clockwise
2. TO SET THE ON/OFF PERIODS
Select the ON times by pushing the tappets to the
outside.
Select the OFF times by pushing the tappets to the
inside.
Fig. 2 shows the clock set as follows:-
ON 3.00pm to 10.00pm (15 - 22)
OFF 10.00pm to 5.00am (22 - 5)
ON 5.00am to 8.00am (5 - 8)
OFF 8.00am to 3.00pm (8 - 15)