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INSTALLATION
Display
Menu Par.
visualis-
Description
No.
ation
Number
Defines the number of modules of which the cascade
M2
147
of Units
consists.
Defines the cascade operation mode.
Power
0 = Disabled
M2
148
Mode
1 = Min burners
2 = Max burners
Max.
Defines the maximum decrease in the primary
Setp.
M2
79
circuit's cascade set-point. Is based on the primary
Offset
circuit's probe reading.
Down
Max.
Defines the maximum increase in the primary circuit's
M2
80
Setp.
cascade set-point. Is based on the primary circuit's
Offset Up
probe reading.
Defines the time in minutes from the moment the
Start
demand is triggered until the activation of the set-
M2
81
Mod. De-
point increases or decreases provided for by Par. 79 e
lay Fact.
80.
It defines the minimum power for at least one of the
Next
modules in the cascade in order for the next module
M2
82
Module
to be switched on (if the other conditions linked to
Start Rate
Par. 75 and 77 are met).
It defines the maximum power for all the modules
Next
in the cascade in order for the last module on to be
M2
83
Module
switched off (if the other conditions linked to Par. 76
Stop Rate
and 78 are met).
Module
It defines the time interval (in days) after which mod-
M2
84
Rotation
ules are rotated.
Interval
First
Establishes the number of the next module to be
M2
149
Module
rotated (this value is automatically updated at each
to Start
rotation).
Defines the proportional term to change the setpoint
M2
86
PID P
of the cascade module.
Defines the integral term to change the setpoint of
M2
87
PID I
the cascade module.
Defines the speed (in °C/100 ms) with which the set-
point of individual modules is increased in the event
PID Slew
M2
150
the primary circuit's set-point is not achieved (if the
Rate Up
value is set to zero, the change is controlled by the PI
of Par. 86 and87 without restrictions).
Defines the speed (in °C/100 ms) with which the set-
point of individual modules is decreased in the event
PID Slew
M2
151
the primary circuit's set-point is exceeded (if the
Rate Dn
value is set to zero, the change is controlled by the PI
of Par. 86 and 87 without restrictions).
Pwr-
Defines the power value (in percentage terms)
Mode2
against which the average power of all on modules
M2
152
Min
in cascade operation mode must be compared (Par.
Power
148 = 2).
Pwr-
Defines the extra power value (in percentage terms)
M2
153
Mode2
compared to the average power of all on modules in
Hysteresis
cascade operation mode (Par. 148 = 2).
Post-
Defines overrun time in seconds at the end of the
M2
154
Pump
cascade heat demand.
Period
Defines the temperature (detected by the primary
sensor) below which the thermal module circulator
and the system circulator (with cascade configu-
ration) activate. If the temperature of the primary
155 Frost Pro-
sensor falls another 5 degrees below the value set
M2
tection
by Par. 155, then a request to activate the cascade
is generated. When the temperature of the primary
sensor reaches the value defined by Par. 155 increased
by 5 degrees, then the request ceases and the cas-
cade returns to stand-by mode.
Boiler
M3
73
Defines the way in which the boiler is managed.
Address
Max.
Defines the maximum decrease in the primary cir-
Setp.
M3
169
cuit's cascade set-point. Is based on the secondary
Offset
circuit's probe reading.
Down
Default
Access
Range
UM
setting
type
1...8
8
I
0,1,2
2
I
0...40
2
°C
I
0...40
5
°C
I
0...60
60
Min.
I
10...100
80
%
I
10...100
25
%
I
0...30
1
Days
I
1..16
1
I
0...1275
50
O
0...1275
500
O
0...25.5
1
O
0...25.5
1
O
0...100
20
%
I
0...100
40
%
I
0...255
60
Sec.
I
10...30
15
°C
I
Managing, Stand-
Stand-
I
alone, Dependent
alone
0...40
2
°C
I
64
Display
Menu Par.
Category
visualis-
No.
ation
Max.
Defines the maximum increase in the primary circuit's
Cascade
M3
170
Setp.
cascade set-point. Is based on the secondary circuit's
Offset Up
Start
Defines the time in minutes from the moment the re-
Cascade
M3
171
Mod. De-
quest is triggered until the activation of the set-point
lay Fact.
increases or decreases provided for by Par.169 e 170.
Defines the proportional term to change the set-
M3
176
PID P
point of the cascade module based on the secondary
Cascade
Defines the integral term to change the set-point of
M3
177
PID I
the cascade module based on the secondary circuit's
Cascade
Defines the speed (in °C/100 ms) with which the set-
point of individual modules is increased in the event
PID Slew
M3
178
the secondary circuit's set-point not reached (if the
Cascade
Rate Up
value is set to zero, the change is controlled by the PI
Defines the speed (in °C/100 ms) with which the set-
point of individual modules is decreased in the event
Cascade
PID Slew
M3
179
the primary circuit's set-point is exceeded (if the
Rate Dn
value is set to zero, the change is controlled by the PI
Supports uploading the values of Par. 92, 93 and 94
Cascade
98 Appliance
M4
from a set of pre-defined rpm values that identifies
Settings
IO Con-
Supports uploading the values of Par. from 116 to 128
Cascade
M4
97
figura-
from a set of pre-defined rpm values that defines the
tion
configuration of the boiler's inputs and outputs.
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
NOTE:
Cascade
Please see sections "Replacing and configuring the display board" and "Replacing and configuring the control board" for detailed
information on how to use and configure parameters 97 and 98.
Cascade
Description
Range
0...40
probe reading.
0...60
0...1275
circuit's temperature.
0...1275
temperature.
0...25.5
of Par. 176 and 177 without restrictions).
0...25.5
of Par. 176 and 177 without restrictions).
1...12
19...22
the boiler type.
1...37
65
INSTALLATION
Default
Access
UM
Category
setting
type
5
°C
I
Cascade
40
Min.
I
Cascade
25
O
Cascade
1000
O
Cascade
1
O
Cascade
1
O
Cascade
I
General
I
General
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