JP1
JP3
JP4
JP5
natural gas
LPG
heating water by set up
floor heatig - watching the temperature of
of heating water - 40°C maximally
anti-cycling function - waiting for 180 s
between switching off and on
switched on immediately after dropping the
heating water temperature under set up level
Run-out of the pump for 0,4-2s by the
temperature of heating water
run-out of the pump after hot-water
heating is always for 2 s
Broken
Switched
20
19
19
Red LED
Green LED 1 Green LED 2
Boiler off
X
OFF
X
Boiler in emergency mode
OFF
ON
OFF
Breakdown - ignition mode
ON
ON
OFF
Breakdown - overheating
Parasitic flame, error in ACCF unit
ON L
ON
ON L
No water pressure
ON
ON
OFF
Lack of air -
Waste gas thermostat open
ON LA
ON
ON LA
Sensor damaged
OFF
ON
ON L
Flame presence
OFF
ON
ON
ON
= lighting
X = all the error signallings possible
ON L
= flickering
ON LA = flickering alternately
OFF
= no lighting
Anti-freezing function
Control of ventilator, air flow and waste gas (NST version)
The type with open combustion chamber. (NSK version)
Service testing functions
Signalling
If a thermal sensor of the heating circulation finds a decrease of temperature of under 6°C,
the pump is activated and burner starts with minimum output. This lasts until the 25°C
temperature is reached and then the anti-freezing function stops working.This function is
active even when the operation switch is in SUMMER position and in emergency mode
(stand-by). If there is a failure in the boiler, only pump is activated.
If there is a request for ignition, burning automatics at first tests the condition of manostat.
If it is in a still position, burning automatics switches the waste gas exhaust ventilator. If the
ventilator is operating and the exhaust is clear, the manostat switches into working position
and the boiler is burned. Difference pressure must be over 80 Pa.
After each blowing out the ventilator keeps working 20 seconds more.
In this version, if there is a request for heat, the burner control unit is activated after
activating the pump and verifying the water passage. In the case of failure (rising
temperature because of wrong waste gas exhaust) the waste gas thermostat breaks contacts,
the burner blows out and a failure is signalled. Reignition is not possible for 30 minutes.
This time period can be cleared (reset) with the operation switch.
If this function is chosen, the boiler starts working in the heating mode to the maximum
output of the burner and maximum temperature of the heating water (80°C). The burner is
off after reaching the maximum switch-off temperature (85°C). If there is a request for hot
water, this function is interrupted and the request is postponed. This function can last 15
minutes maximally and then it is necessary to switch the operation switch to some of other
functions and then back to this function.
Functions of the BERTELLI automatics in MAXIMUS RZT, RZK boilers
If the spatial thermostat is not connected,
If the spatial thermostat is connected,
Anti-cycling function
the pump keeps working even if the boiler is off.
the pump is in operation after switching off the boiler
during 180 seconds.
Time of anti-cycling begins when the tempearute of heating water overcomes the
temperature set up by the boiler or spatial thermostat in 2 - 3°C. Before that, the ouput has
been modified to minimum by microprocessor and then gas inlet was stopped. During this
time the boiler is off and must not be switched on despite the heating water having been
cooled. Anti-cycling time in the range of 0 to 180 seconds is set up by JP3 jumper. Normal
burning begins when the anti-cycling time is over. This function prevents the boiler working
in a small circuit (e.g. closed heating valves) to burn and turn out. If there is a request for
hot water during this time, the immediate burning on starts. Short-circuiting of JP3 jumper
causes disabling of this function. The boiler then reacts without stopping, burns on
immediately after dropping the temperature of heating water (if the spatial thermostat is on).
The run-out time starts in the moment of switching off the boiler by the thermostat. At the
end of each request for heating, the pump stays in operation for 180 seconds more. The run-
out of the pump has 2 important functions:
– it cools heat-exchanger to prevent overheating
– in the run-out time, the temperature differences on heating bodies are equalized
The run-out of the pump by the request for hot water is set up by JP5 jumper. When the
jumper is in OFF position, the run-out is 0.4 - 2 seconds, in ON position the run-out is
always 2 seconds.
Run-out of the pump
Summary of Contents for Attack NSK
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