Installation instructions S-HR series page 8
6.1
Central heating system
The boiler pipes can be connected to the installation by
means of compression fittings. Reducers should be used
for connecting to thick-walled pipe (welded or threaded).
The boiler has a self-adjusting and self-protecting control
system for the load and the pump capacity. By this means
the temperature difference between the flow and return
water is checked. The circulation pump will be able to
supply the given water displacement with an installation
resistance of up to 20 kPa, for this see table 3.
If the installation resistance is higher than the stated value
If an unacceptable temperature is detected, then the
control will repeatedly try to achieve water flow, and if this
does not work then the boiler will switch off.
The S-HR 60 boiler has a circulation pump which has a
residual suction head for the installation of 20 kPa. This
means that the boiler can function normally in installations
which have an installation resistance of up to 20 kPa and
in cascade installations.
If the installation resistance is higher than 20 kPa, the
boiler will automatically reduce in power.
If the capacity of the boiler pump is insufficient, an extra
external pump can be installed in series with the boiler.
The electrical side of this external circulation pump can
be connected in the Control Tower, by which means this
pump switches at the same times as the boiler pump.
The maximum absorbed current consumption of the
external circulation pump may be 230 W (1 Amp).
Use with a low velocity header can also be selected. In
this case a larger secondary sided water output has to
be taken into account, in order to affect the maximum
water temperature.
the pump will rotate at maximum pump capacity and the
load will be adjusted until an acceptable temperature
difference between flow and return water has been
obtained. If, after this, the temperature difference remains
to much then the boiler will switch itself off and wait until
an acceptable temperature has arisen.
available water flow at full load
table 3
external installation pump in series
figure 3
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pump index lines
graph 1
Q(m³/h)
100% UPER 20-70
S-HR 15, 24, 35
S-HR 24Ti, 35Ti
S-HR 51Ti
S-HR 51, 60
100% UPER 20-60
H(m)
25% UPER 20-60
25% UPER 20-70
Содержание Blauwe Engel S-HR 15
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Страница 31: ...Installation instructions S HR series page 31 19 CE Certificate United Kingdom...
Страница 32: ...Installation instructions S HR series page 32 20 CE Certificate Ireland...
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