Bosch Worcester Danesmoor Utility Regular ErP+ 12/18 Installation, Commissioning And Servicing Instruction Manual page 60

If in the unlikely event the boiler does not give complete sat-
isfaction, 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)
3. Is the air bled from the primary system?
4. Is the air bled from the oil supply?
5. 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 over-
night 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 guide-
lines.
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 cor-
rectly?
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.
NOTICE: APPLIANCE OPERATION
UNDER NO CIRCUMSTANCES MUST AN
APPLIANCE BE LEFT TO OPERATE WITH ANY
CONTROL LINKED OUT OR OVER RIDDEN.
Worcester, Bosch Group
Cotswold Way, Warndon, Worcester WR4 9SW.
Tel. 0330 123 9559
Worcester, Bosch Group is a brand name of Bosch Thermotechnology Ltd.
worcester-bosch.co.uk
6 720 821 720 (2018/04)
WORCESTER, BOSCH GROUP:
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