Worcester 18/25 Instruction Manual download pdf (Page 52)

CONTACT INFORMATION

WORCESTER, BOSCH GROUP:

TECHNICAL: 0844 892 3366

SERVICE: 0844 892 3000

SERVICE (EIRE): 01494 0099

SPARES: 01905 752571

LITERATURE: 0844 892 9800

TRAINING: 01905 752526

SALES: 01905 752640

WEBSITE: worcester-bosch.co.uk

WEBSITE (EIRE): worcester-bosch.ie-

Dedicated to heating comfort

Worcester, Bosch Group

Cotswold Way, Warndon, Worcester WR4 9SW.

Tel. 0844 892 9900 Fax. 01905 754619

Worcester, Bosch Group is a brand name of Bosch Thermotechnology Ltd.

www.worcester-bosch.co.uk

8 716 106 256C (03/2010)

If in the unlikely event the boiler does not

give complete satisfaction, before calling for

a service engineer, the installer should

check the following:-

General checks

1. Is there 230V across the boiler live and neutral terminals?

2. Is the polarity correct? (230V across live and earth, 0V across neutral and earth)

2. Is the air bled from the primary system?

3. Is the air bled from the oil supply?

4. Is the flue sized and routed correctly?

Boiler runs straight to lockout

1. Has the oil line been purged of air?

2. Where an air eliminator is used in conjunction with a top feed oil tank

the non-return valve, (if fitted), should be removed from the oil dip pipe.

Boiler locks out at the start of a demand

(Heating off overnight for example)

1. If an air eliminator is being used, check that there are no leaks that allow

air to be pulled into the oil supply.

2. If a two pipe oil supply is a being used, has a non-return valve

been fitted to the inlet pipe? Refer to the instructions for guidelines.

No domestic hot water

1. Is there a domestic hot water demand from the programmer and has the

tank reached temperature?

2. Is the circulating pump operating?

3. Are the programmer, tank thermostat, circulating pump and diverter

valve/zone valves wired correctly?

4. Is there 230V across L and N? If not there is no demand to the

boiler from the controls or the controls wiring is not correct.

No central heating

1. Are both programmer and room thermostat on demand for central heating?

2. Are the room thermostat, programmer, circulating pump and diverter

valve/zone valves (if CH and DHW system) wired correctly?

3. Is the circulating pump operating?

4. Is there 230V across L and N? If not there is no demand to the

boiler from the controls or the controls wiring is not correct.

UNDER NO CIRCUMSTANCES MUST AN APPLIANCE BE LEFT

TO OPERATE WITH ANY CONTROL LINKED OUT OR OVER RIDDEN.

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