Expansion vessel
The expansion vessel (85) volume is 12 litres and has a pre-pres-
sure of 50 kPa (0.5 bar) as standard. This means that the maxim-
um height (H) between the vessel and the highest situated radi-
ator is 5 m, see the figure to the side.
If the standard pre-pressure in the pressure vessel is not high
enough it can be increased by adding air via the valve in the ex-
pansion vessel. The pre-pressure of the expansion vessel must
be stated in the inspection document. Any change in the pre-
pressure affects the ability of the expansion vessel to handle the
expansion of the water.
If the heating installation has an open expansion vessel, the dis-
tance between the highest radiator and the expansion vessel
must not be less than 2.5 m.
Max radiator volume
Max permitted radiator volume is 150 litres at a pre-pressure of
0.5 bar.
Pressure controlled bypass valve
EVC 13 is equipped with a pressure controlled bypass valve (48).
This is to protect the circulation pump in installations where the
radiator flow can stop completely. When the radiator side is
closed the boiler water is circulated across the pump internally
in EVC 13.
Draining the boiler water
WARNING!
Before draining the boiler water, cut the power sup-
ply.
The drain valve is used to drain the boiler of water. Un-
screw the protective cap and install a hose on the draining
pipe, open the valve.
Arrange air supply, for example via the safety valve by
setting it to open mode.
EVC 1316
English
Pipe installation
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