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USER INSTRUCTIONS
HEATWELL STORAGE COMBINATION BOILER
PRODUCT
Electric Combination Boiler Models - Heatwell Electro 12Kw
DESCRIPTION
The unvented electric combination boiler is an efficient boiler unit designed to provide you with central
heating and hot water.
Your electricity supplier controls the electricity supply to the boiler, avoiding the peak supply periods.
This enables you to receive low cost electricity, which the boiler due to its storage capacity will continue
to supply heat and hot water during the interrupt periods. It is however, advisable to program the heating to
prevent the house becoming cold i.e. below 18Deg C and have the heating programmed to raise the
temperature to comfort level 21DegC at least 30mins before a switch off period. This will assist the boiler
store of hot water to bridge the two hour gap when the power is switched off.
OPERATION
Central Heating
The electric combination boiler is designed to connect to a conventional domestic central heating radiator
system. Control of the heating is by a standard heating programmer, room thermostats and thermostatic
radiator valves, common to all wet central heating systems. Reference should be made to the makers
instructions supplied with this equipment.
Hot Water
Hot water is supplied from the boiler, through a mixing valve, located on the boiler hot water outlet pipe.
This valve is factory pre-set at 55Deg C and should not normally require adjustment. In the event that
adjustment is required, your approved installer, to ensure that there is no danger of high water
temperatures, which could cause scolding, must carry this adjustment out.
The boiler should at all times be left switched on to take advantage of the tariff. And since the heat loss
from the boiler is very low, the cost will be minimal.
Holiday Periods
The cost of leaving the boiler in the "on" position when away for a short break or holiday is extremely
small due to the low boiler heat loss and has the advantage of providing hot water and heat when
demanded on your return. During extended periods it is recommended that the boiler be switched off,
except in winter when there is the danger of frost damage the boiler should be left switched "on" with the
room thermostat set to 5deg C at least to provide frost protection.
