This parameter switches ON and OFF the boiler return
protection function performed using mixing valve with
electric servo. Note: do not switch on this function if the
valve is not provided with electric servo!
Boiler return temperature below the value at which
electric servo closes mixing valve.
Electric servo returns to normal operation at the return
temperature ≥ min.return temperature + Return temp.
hyst.
It is % opening of mixing valve during active return
protection function. Note: the valve closes with accuracy
of +/-1%.
The temperature of retort boiler at which reserve boiler
(e.g. gas fired boiler) will be OFF is set using this
parameter. Details - see sec. 11.12
Parameter used to rough calculation of boiler output
(displayed in INFO window) and of fuel level and it has
no effect on control of combustion process [kg/h].
Parameter used to rough calculation of boiler output; it
has no effect on control of combustion process. Its value
for hard coal amounts to approx. 6.5 [kWh/kg]
Parameter used to calculate fuel level [kg]. Note:
Change and confirmation of the value using the knob
replaces previously completed fuel level calibration with
calculation of fuel level using Tank Capacity and Feeder
Efficiency parameters.
13 SERVIS SETTINGS OF PUMPS
CH pump standstill at HUW
supply
Parameter available upon connection of HUW sensor. Too
long time of HUW container filling at active HUW priority
may lead to excessive cooling down of CH system
because boiler pump (CH pump) is switched off at this
time. Parameter of CH pump standstill time during HUW
filling prevents it by periodic CH pump switch-on during
HUW container filling. After that time, CH pump will
switch on for a fixed time set at 30s.
This parameter is available upon connection of HUW
sensor and prevents the user to set too low preset HUW
temperature.
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