Ignition Sequence - RBI IEW-199 Installation And Operation Instructions Manual

BOILER CONTROL: INTERNAL WIRING & OPERATION
B. IGNITION SEQUENCE
Figure 8.1 shows the ignition sequence for the Infinite
Energy boiler control. Table 8.3 describes each step in the
sequence in detail. The boiler control provides dual
sensing of the flame to maximize the reliability. The
control senses the burner flame with both the flame
sensor and the ignition electrode.
Igntion Cycle
Demand
Fan
Pump
Gas Valve
Ignitor
Flame Signal
Figure 8.1: Ignition Cycle – Graphical Representation
Table 8.3: Ignition Sequence
Period
No demand is present.
Standby
If the power is on to the Infinte Energy boiler and there is no heat demand, the user interface will display "Standby" and show the
boiler supply temperature in the lower right corner. The time, in 24 hour format, is shown in the upper right. When a heat demand
(either CH or DHW) is present, the boiler begins the ignition cycle.
A DWH demand must be present to initiate ignition.
Once initiated the boiler will light.
Pre Purge
When a demand is present, the control starts the combustion air fan. The fan speed then increases to ignition speed and the user
interface displays "DOMESTIC HOT WATER" along with "Trial for ignition." This screen is displayed until the burner is lit and
stable or until a fault occurs. Once the ignition sequence begins it will continue through ignition even if the demand has ended.
30
Safety On/Off
Maximum 24 hours
320 milliseconds
Demand Status User Interface Display
On
Off
High
Ignition
Low
Off
On
Off
On
Off
On
Off
On
Off