Appendix L - Flowcharts - Riello Array AR 3000 Installation And Operation Manual

APPENDIX SHUTDOWN

APPENDIX L - FLOWCHARTS

SINGLE MODULE
Temp Above the
NO
module setpoint
Is Delta between
supply and return
NO
timer finished
YES
(*) see Burner ignition sequence on next page.
NO
Burn: Based on delta of Supply sensor
and Setpoint PID output is determined
Is the supply
Burner off,
Post pump
+ Hyst Up?
YES
larger than max
delta?
YES
Post Pump
NO
or no longer
priority
Module in
Stop pump
Stand-by
NO
Demand for Post pump
NO
module
YES
Start pump
Supply
Temp
YES Start fan
lower than
Setpoint
Module
CH flow
Start burner (*)
is above
min_flow?
BURN
Post burn
YES
YES
62 62
YES
ready
Blocking
NO
error
Demand
NO
Still active?
YES
Is the supply
Temp Above the
module setpoint
+ Hyst Up?
NO
Is Delta between
supply and return
NO
larger than max
delta?