31
-
Figure No. 24 shows the optimal shape of the flame for the rated boiler output in case brown coal used
as the fuel.
-
Figure No. 25 shows the awkward shape of the flame, which is caused by incorrect setting of the
combustion air. It is necessary to reduce the amount of combustion air (parameter P 167, or P165, P163,
P161).
-
Air control is effective only if the grid is properly centred and sealed.
Note: When setting we try as much as possible achieve the optimal shape of the flame, see. Figure No. 24
Fig.No. 24 Optimal shape of the flame
Fig.No. 25 Awkward shape of the flame
5.6
HMI (ACX84.910/ALG) service unit for Saphir regulator operation
HMI (ACX84.910/ALG) service unit for Saphir regulator operation in combination with QAA 88 device can be
used as display of boiler. This unit has a separate service manual.
The preservation of left segment of S1 switch in off position is the condition of HMI unit connection.
5.7
Superior control
The manufacturer recommends the superior control of Siemens series RVS (RVS 43,345 + additional
modules), because for its use has been already processed the design documentation of VIADRUS.
In the case of using the superior control is necessary to do the following:
•
For electrical connection of the superior control is used the input D2 on the controller Saphir
•
The right segment of the switch S1 must be in position off
.
•
On the line P 24 of device QAA 88 select the value 2.
•
On the operating unit HMI the superior control shall be activated in Menu Boiler / Type of Requirement
by selecting the function RVS. In the Menu Boiler / RVS is signalled the current state of the superior
control (ON / OFF).
•
The boiler must remain in the status Auto (device QAA 88 – see Fig. No. 27).
•
Due to the forced exhaust of excess heat must be connected the sensor from the superior control at the
output from the boiler (see Design documents VIADRUS).
Reaction of the boiler
The boiler becomes only a source of heat in case of using the superior control. In the manufacturer the outlet
temperature of boiler was set to 70 ° C. This temperature can be changed by pressing the buttons Plus and
Minus in the range ± 15 °C (device QAA 88 - see Fig. No.27). The regimes of time, heating of water and
control of heating circuit are not active. Parameters relating to the regimes of time, heating of water and
heating of the heating circuit will not be displayed on the device QAA 88 and on the operating unit HMI and
only the setting of parameters for the boiler remains active (e.g. fan, feeder and pump of boiler).
If the requirement from the superior control is active, then the value 1 is displayed on the line P 231of the
device QAA 88.
If the requirement from the superior control is not active, then the value 0 is displayed on the line P 231of the
device QAA 88 and at the same time there is not displayed the desired outlet temperature of boiler (after
pressing the button Plus and Minus - the device QAA 88 - see. Figure 27)
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