5. Removing cinders Removing cinders from the boilers combustion chamber takes place as
required. This requirement is dependent on the ash contents of the fuel.
6. Cleaning the vent pipe
NB: the smoke gas sensor is
removed.
While cleaning the vent pipe from the boiler to the chimney, it is important
that the smoke gas sensor is meanwhile removed so that is does not get bent
or damaged.
1.12 Operating the pump
If the pump "gurgles", this means that there is air in the system. During ventilation, the pump must be
switched off. Ventilate the radiators.
If the pump "howls" or "wails" this can be because there is insufficient water in the system. The pump's
bearings are lubricated by water, and they will be ruined if there is insufficient water. The pump must
normally be in operation the whole year in order to provide heat for the radiators or the under-floor
heating pipes. In the event of an external hot water tank, it is a prerequisite that the pump is in operation
in order to obtain domestic hot water.
1.13 Operating the mixing valve (shunt valve) - (extra equipment)
By means of this, the temperature of the water for the radiators can be adjusted. This takes place by
mixing more or less return water into the boiler water. The mixing valve can be supplied with motor
control in connection with a weather compensation system. (See automation).
1.14 Use of pressure gage
The heating and ventilation fitter will have, in connection with the installation, fitted a pressure gage
which shows the water pressure in the central heating system. Set the red mark above the movable
indicator when the system is filled up with water. Then when, during the course of time, the water has
dropped somewhat below this adjustment, the system must be filled up with water.
1.15 Filling up with water
The faucet for filling up (pos. 8, fig. 1.1) is, for type 1.5 and 4.0, situated behind the removable plate. For
type 2.5, it is situated between the hopper and the boiler.
Filling up with water takes place while the pump is switched off.
Filling up with water takes place by means of a hose which is screwed onto the filling faucet and
connected with a water faucet. First, fill up the hose with water prior to filling up the boiler, otherwise the
air content in the hose will be pressed into the boiler system. Remove the hose after filling up and start the
pump again.
Normally, it is necessary to fill up with water twice a year.
Filling up the boiler with water ought, after some time, to be followed by ventilation, since new water
contains air which is released by heating.
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