Riello 20155654, Инструкции по установке, использованию и обслуживанию

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51 20155699 GB
Options
8.1.3 Operating Description
The burner start-up is carried out as described above. At least
“Burner ON” signal and “Release” must be sent by firing rate con-
troller.
The burner starts as soon as it is receiving signals “Burner ON”
and “Release” from firing rate controller. The firing rate controller
is in operation not before the burner is running and the signal
“Control Release” is pending.
The default value of firing rate for fuel/air ratio control is set via
integral firing rate controller.
Depending on the difference between actual and set-point value
and adjusted control parameters this default firing rate value is
set. When actual value is exceeding to maximum value the firing
rate controller switches OFF combustion.
The firing rate controller is active in AUTOMATIC mode only.
8.1.4 Control by atmospheric conditions and
external set-point presetting
Control by Atmospheric Conditions (Fig. 90)
If burner firing rate controller is configured as “controlled by at-
mospheric conditions” the set-point value can be shifted between
the parameter set set-point minimum and set-point maxi-mum by
connecting another Pt100/Pt1000 temperature sensor to the ter-
minals 25, 26 and 27.
The controller by atmospheric conditions outside temperature is
part of set-point calculation. As a result the operator is able to set
minimum and maximum set-point values determining final set-
point value by outside temperature.
Set-point:
Value min P 48/50
Value max P 49/51
Lower limit P 52
Upper limit P 53
With activated option “Control by atmospheric condition” you may
also implement external set-point pre-setting.
External Firing rate Input
You can establish an external firing rate input if control by atmos-
pheric conditions is activated. Therefore you must short-circuit
terminals 25 and 26.
Connect at terminals 16 and 17 a 0/4 ... 20 mA signal for set-point
presetting. Now you can adjust set-point between a maximum
value at 0/4 mA and a minimum value at 20 mA.
If you use set-point switching, the range of external set-point
switching is shifted.
External set-point Presetting (Fig. 91)
For the external set-point values to be activated, parameter 40
must be set to the value 2 (con-trol by atmospheric condition).
The terminals 25, 26 and 27 must be short-circuited.
At terminal 16 and 17 (+) of the LCM100, a 0/4 ... 20 mA would
be connected.
Lower limit P 52
Upper limit P 53
The following parameter must be set:
Parameter 0051 and 0052 are necessary only in case a set-point
changeover is required.
Fig. 90
S9614
Supply temperature
Outside
Max set-point
Min set-point
Low
er
limi
t
Up
per limi
t
temperature
Parameter:
0040
2; control by atmospheric condition/set-point shift
0052 0; in the usage of 0 ... 20 mA at the set-point input
0052 40; in the usage of 4 ... 20 mA at the set-point input
0053 200
0048 set-point 1 which should be set with 0/4 mA at set-
point input
0049 set-point 1 which should be set with 20 mA at set-
point input
0050 set-point 2 which should be set with 0/4 mA at set-
point input
0051 set-point 2 which should be set with 20 mA at set-
point input
Fig. 91
S9615
set-point
Max set-point
Min set-point
Voltage
input
Low
er
limit
Up
per limit