
0014_Installation_Operation_Manual
A0
Copyright 2017 Unifire
3.
On conclusion of the PURGE the
STANDBY/PURGE LED switches OFF and
the trial for ignition begins. The FLAME
LED flashes. The Ignition (IGN) output
and DO1 driver are energized.
FR
IGN
DO1
DO2
DO3
4.
Once a flame is detected the FLAME
LED is held ON and the Ignition (IGN)
output is de-energized.
FR
IGN
DO1
DO2
DO3
5.
On expiry of the flame stable timer the
DO2 and DO3 outputs are Energized.
FR
IGN
DO1
DO2
DO3
6.
2 Seconds later the DO1 output is de-
energized
and
flame
monitoring
continues on the Main flame.
FR
IGN
DO1
DO2
DO3
7.
If the flame is lost the DO1 and IGN
outputs re-energize as part of the flame
failure response system. A failure to
recover the flame results in retrial or
lockout.
FR
IGN
DO1
DO2
DO3