Riello Array AR 2000 Installation And Operation Manual page 75

APPENDIX
BOILER CASCADE
Stop system
pump
YES
Post pump
completed
Calculate
system
setpoint
System
Temperature
higher than
setpoint Clear
demand?
First boiler
active?
YES
System Temp
Remove
higher than
YES
Boiler fast
setpoint remove
fast?
System Temp
Power
NO
lower than
Balancing
Setpoint add
YES
Add boiler
System in
stand-by
Boiler error
Present?
NO NO
System
NO
Heat
Demand?
YES
Start system
pump
Clear demand Remove all
YES
active boilers
NO
Turn on first boiler
NO
immediately
System Temp
higher than
NO
setpoint
remove
NO
System Temp
lower than
NO
Setpoint add
fast
YES
Add boiler
fast
See the flow of Add
boiler of how a boiler
is added
75 75
Locking error
YES
Locking
YES
error?
NO
Blocking
error
Remove
YES
Boiler
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