Riello Array AR 399 SE Installation, Operation And Service Manual page 76

APPENDIX
APPENDIX RECYCLING AND DISPOSAL
Nr. dis-
Par.
Menu played
No.
Display
Defines how many degrees the temperature mea-
Hyst. Up sured by the primary circuit's sensor must go above
M2 145 Quick the set-point in order for the subsequent boiler to
Stop be switched off after the time interval set by Par. 143
Defines how many degrees the temperature mea-
Hyst. Up sured by the primary circuit's sensor must go above
M2 146
Stop All
Number Defines the number of boilers of which the cascade
M2 147
of Units
Power
M2 148
Mode
Max.
Defines the maximum decrease in the primary cir-
Setp.
M2 79 cuit's cascade set-point. It is based on the primary
Offset
Down
Max.
Defines the maximum increase in the primary cir-
Setp.
M2 80 cuit's cascade set-point. It is based on the primary
Offset
Up
Start Defines the time in minutes from the moment the
Mod. demand is triggered until the activation of the set-
M2 81
Delay point increases or decreases provided for by Par. 79
Fact.
Next Defines the minimum power for at least one of the
Module boilers in the cascade system in order for the next
M2 82
Start
Rate
Next
Module
M2 83
Stop
Rate
Module
M2 84 Rotation
Interval
First
M2 149 Module rotated (this value is automatically updated at each
to Start
Pwr-
Mode2
M2 152
Min in cascade operation mode must be compared (Par.
Power
Pwr-
Mode2
M2 153
Hyster-
esis
Post-
M2 154 Pump
Period
Frost
M2 155 Protec-
tion
increased by 9°F (5°C), then the request ceases and
Description
(quick stop mode).
the set-point in order for all "On" sensor to be
switched off at the same time.
system consists of.
Defines the cascade operation mode.
circuit's sensor reading.
circuit's sensor reading.
and 80.
boiler to be switched on (if the other conditions
linked to Par. 75 and 77 are met).
Defines the maximum power for all the boilers
in cascade in order for the last boiler on to be
switched off (if the other conditions linked to Par.
76 and 78 are met).
It defines the time interval (in days) after which
boilers are rotated.
Establishes the number of the next boiler to be
rotation).
Defines the power value (in percentage terms)
against which the average power of all on boilers
148 = 2).
Defines the Hysteresis power value (in percentage
terms) compared to the average power of all on
boilers in cascade operation mode (Par. 148 = 2).
Defines pump overrun time in seconds at the end
of the cascade heat demand.
Defines the temperature (detected by the prima-
ry sensor) below which the boiler circulator and
the system circulator (with cascade configuration)
activate. If the temperature of the primary sensor
falls another 9°F (5°C) below the value set by Par.
155, then a request to activate the cascade system
is generated. When the temperature of the pri-
mary sensor reaches the value defined by Par. 155
the cascade returns to stand-by mode.
Range
0 - 72
(0 - 40)
0 - 72
(0 - 40)
1 - 6
0 Disabled
1 Min burners
2 Max burners
0 - 72
(0 - 40)
0 - 72
(0 - 40)
0 - 60
10 - 100
10 - 100
0 - 30
1 - 16
0 - 100
0 - 100
0 - 255
18 - 54
(10 - 30)
76 76
Default Access
UM Category
setting type
11 (6) °F (°C) I
14 (8) °F (°C) I
6 I
2 I
5.6 (2) °F (°C) I
9 (5) °F (°C) I
60 Min. I
80 % I
25 % I
1 Days I
1 I
20 % I
40 % I
60 Sec. I
27 (15) °F (°C) I
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade
Cascade