Riello 20115221, Installation, Technical And Maintenance Manual

Page: 46 / 84

46
INSTALLATION
Menu Par.
No.
Nr. dis-
played
Display
Description Range
Default
setting
UM
Access
type
Category
M2 143
Delay
Quick
Stop Next
Defines the stand-by time in seconds to switch off
the last cascade module on in Quick Stop mode.
5…255 15 Sec. I Cascade
M2 77
Hyst.
Down
Start
Module
Defines by how many degrees the temperature
measured by the primary circuit's probe must fall
below the set-point in order for the subsequent
module to be started after the time interval set by
Par. 75.
0…40 5 °C I Cascade
M2 78
Hyst.
Up Stop
Module
Defines by how many degrees the temperature
measured by the primary circuit's probe must go
above the set-point in order for the subsequent
module to be switched off after the time interval
set by Par. 76.
0…40 4 °C I Cascade
M2 144
Hyst.
Down
Quick
Start
Defines by how many degrees the temperature
measured by the primary circuit's probe must go
below the set-point in order for the subsequent
module to be started after the time interval set by
Par. 142 (quick-start mode).
0…40 20 °C I Cascade
M2 145
Hyst. Up
Quick
Stop
Defines by how many degrees the temperature
measured by the primary circuit's probe must go
above the set-point in order for the subsequent
module to be switched off after the time interval
set by Par. 143 (quick stop mode).
0…40 6 °C I Cascade
M2 146
Hyst. Up
Stop All
Defines by how many degrees the temperature
measured by the primary circuit's probe must go
above the set-point in order for all "On" modules
to be switched off at the same time.
0…40 8 °C I Cascade
M2 147
Number
of Units
Defines the number of modules of which the cas-
cade consists.
1…8 8 I Cascade
M2 148
Power
Mode
Defines the cascade operation mode.
0 Disabled 1 Min
burners 2 Max
burners
2 I Cascade
M2 79
Max.
Setp.
Offset
Down
Defines the maximum decrease in the primary
circuit's cascade set-point. Is based on the primary
circuit's probe reading.
0…40 2 °C I Cascade
M2 80
Max.
Setp.
Offset Up
Defines the maximum increase in the primary
circuit's cascade set-point. Is based on the primary
circuit's probe reading.
0…40 5 °C I Cascade
M2 81
Start
Mod.
Delay
Fact.
Defines the time in minutes from the moment the
demand is triggered until the activation of the set-
point increases or decreases provided for by Par. 79
e 80.
0…60 60 Min. I Cascade
M2 82
Next
Module
Start
Rate
It defines the minimum power for at least one of
the modules in the cascade in order for the next
module to be switched on (if the other conditions
linked to Par. 75 and 77 are met).
10…100 80 % I Cascade
M2 83
Next
Module
Stop Rate
It defines the maximum power for all the modules
in the cascade in order for the last module on to be
switched off (if the other conditions linked to Par.
76 and 78 are met).
10…100 25 % I Cascade
M2 84
Module
Rotation
Interval
It defines the time interval (in days) after which
modules are rotated.
0…30 1 Days I Cascade
M2 149
First
Module
to Start
Establishes the number of the next module to be
rotated (this value is automatically updated at each
rotation).
1..16 1 I Cascade
M2 86 PID P
Defines the proportional term to change the set-
point of the cascade module.
0…1275
50 O Cascade
M2 87 PID I
Defines the integral term to change the setpoint of
the cascade module.
0…1275 500 O Cascade
M2 150
PID Slew
Rate Up
Defines the speed (in °C/100 ms) with which the
set-point of individual modules is increased in the
event the primary circuit's set-point is not achieved
(if the value is set to zero, the change is controlled
by the PI of Par. 86 and87 without restrictions).
0…25.5 1 O Cascade