Manual Wamsler K158 (page 49 of 120) (English, German, French, Italian)

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Where there is a lower distribution ventilating valve it must be provided on each radiator.

The radiators should not be inclined towards the ventilation. As radiators are usually at the

same level on the floor where the stove is installed, these radiators should all be connected

to a circulating pump as matter of course.

If however a pure gravity plant has to be executed without pumps, then the centre of the

radiator should not be lower than the centre of the boiler.

In the simplest installation case, the circulation pump is connected to the mains by a switch

and runs continuously during the heating period, while the water capacity of the stove is

regulated by an integrated temperature controller.

The pumps can however also be controlled from a maximum-thermostat in the domestic

water boiler, to ensure a minimum temperature for the domestic hot water.

It is also possible to switch the circulating pumps through a room thermostat. In this case

however the gravity circulating domestic water boiler should not have a capacity of less

than 260 l, if there are no other radiators on gravity circulation are connected.

Independently of the control types described above, the heating circulation and/or boiler

loading pump should primarily be controlled through a thermostat with a fixed switch on

temperature of between 50 and 55 °C, situated immediately at the stove's return flow con-

nection following an adjustable bypass close to the stove between the flow and return

lines, to avoid a low temperature operation of the stove boiler.

In the installation unit which can be supplied as an accessory there is a thermal boiler

monitor integrated as a continuous regulating valve. The pump controls mentioned above

are then not needed.

Care should be taken when calculating the heat requirement that not only the heat re-

quirement should be taken into consideration but that not only the heating stove itself radi-

ates but a poorly or none insulated boiler gives off heat in the room where it is installed.

Besides the frequently used cookers with built in heat exchangers and double shelled

cookers, which are also supplied in insulated versions, it is also possible to use the domes-

tic water unit with a through flow boiler.

As the pipes of a through flow boiler become calcified quickly where the water is hard, they

should only be used in areas where the water is very soft, that is very low in lime or only in

conjunction with a water softener.

Heating radiator pipes in pumped heating systems can use 1/2" pipe. It is recommended

that a circulation pump that can be regulated is incorporated where the delivery capacity

can be adjusted to the circumstances prevailing. The pump should be installed in the return

flow line. The direction of flow is important.

For exchange purposes if a repair is necessary, cut-off valves should be built in before and

after the pump.

Expansion vessels, boiler and pipes, which are installed in the loft must be well protected

against freezing.

If an installation is not used for some time in winter, it should be emptied. Radiators, venti-

lation valves or other cut off devices should be opened.

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Wamsler K158 Manual

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