IDEAL EVOMOD 250 - Page 33

36 EVOMOD BOILER OPERATING SEQUENCE
Note: the sequence shown is for a 1000kW, 4 burner boiler.
The sequence for other boilers is very similar but the maximum number of burners that
can be switched on cannot exceed the number of burners tted
Standby
Heat Demand
from Switched Live or
0-10V Input
Yes
Header Pump On
Standby
1 Burner On
2 Burners On
3 Burners On
4 Burners On
Heat Demand Off
Temp < Set point
Heat Demand Off
Heat Demand Off
Heat Demand Off
Heat Demand Off
Pump Overrun
Demand < 50kW
Demand > 150kW
Demand > 225kW
Demand > 300kW
Demand > 150kW
Demand > 200kW
Demand > 100kW
INSTALLATION
33
- Installation & Servicing
INSTALLATION