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water in time of reaching of maximal temperature of
Filling overpressure of expansion vessel heating water.
It is necessary to observe overpressure of nitrium filling
for right function of expansion vessel in cold status of 3.8 Circle pump
heating system according to formula:
Pex = 1,2*Pov (pressure of expansion vessel = The boiler has circle pump with 3 output grades.
1,2*pressure of heating water The pump operation is controlled by control unit
Overpressure changes of nitrium filling of depended on boiler regulation and safety requests.
expansion vessel could be carried out only by The pump operation is controlled by control unit
responsible persons or professional companies. depended on boiler regulation and safety requests.
Time running out of the pump make possible to take
away heat accumulated in the boiler body in time of
User has obligation to assure minimally 1 x per year to switching off the boiler. The effect is decreasing of
operation control and 1x per 9 years pressure control losses, removing of temperature tops, reducing of
built-in expansion vessel or additional independent stone and elongation of boiler life time.
expansion vessel. Time running out of the pump is preset from the
production facility according to the point 2.4
Minimal overpressure of heating water
Value of minimal pressure is stated in the table 1.5. The pump is protected against blocking in operation
Minimal overpressure has to be signed on the thermo mode Stand-by. (see the chapter Protection
manometer scale by person putting the boiler into functions). If the boiler is for longer time out of its
operation. The overpressure has not to degrease under operation switched off, we recommend you to switch
position marked on the scale. It is necessary sometimes on the boiler sometimes, minimally 1x per month (see
to control and if it is necessary to fulfil filling the chapter protection of function).
overpressure of heating water.
Electric data of the pump
Filling overpressure of heating water
Normally it is observed in case of first filling of heating
system or in case of filling of minimal overpressure fall of
heating water. Filling overpressure is + 0,2 bar higher
than minimal overpressure specified for reason that
temperature off filling water could be to 20°C (water
dilatability).
3.7 Marking of working scale
On the pressure meter placed under the boiler there is
necessary to mark working scale that the pointer of P1 -pump input
pressure meter is moving in. Minimal pressure is marked I - electric current
by responsible person put the boiler into operation by
pressure meter marking.
Maximal margin = maximal overpressure of heating
16
Curves
15
20
25
0
5
10
15
40 60 80 100 120 140 160 180 200
Minimal volume of expansion vessel
Volume of heating system
Dependency of expansion vessel volume and volume of heating system for temperature gradient 80/60°C
Heating system pressure 2 bars Heating system pressure 1 bar
Heating system pressure 0, 5 bar.
Output
grade P (W)
1I (A)
1 50 0,22
2 60 0,27
3 70 0,31
16


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