IDEAL EVOMOD 250 - Page 32

35 EVOMOD MODULE OPERATING SEQUENCE
out
Standby
Heat
Demand from Master
PCB On
Yes
Fan On
2 m ins Fan P re-Purge
Module Pump On
Spark Generator On
Gas Valve On
5s Ignition Period
Spark Generator Off
5s Stabi lisation Period
Burner Output controlled relative to
Heat Demand from Master PCB by
varying Fan Speed
Burner On
Heat
Demand from Master
PCB Off
Gas Valve Off
120s Pump Overrun
Fan Off
Module Pump Off
Yes
Standby
Flame Detected
Yes
Less
than 5 Ignition
Attempts
No
Yes
Lockout
No
Standby
Heat
Demand from Master
PCB On
Yes
Fan On
2 m ins Fan P re-Purge
Module Pump On
Spark Generator On
Gas Valve On
5s Ignition Period
Spark Generator Off
5s Stabi lisation Period
Burner Output controlled relative to
Heat Demand from Master PCB by
varying Fan Speed
Burner On
Heat
Demand from Master
PCB Off
Gas Valve Off
120s Pump Overrun
Fan Off
Module Pump Off
Yes
Standby
Flame Detected
Yes
Less
than 5 Ignition
Attempts
No
Yes
Lockout
No
INSTALLATION
32
- Installation & Servicing
INSTALLATION