© 2016
CONTRIVE • B14
88|
QBK
.EN
0219
16
www.contrive.it
OIL BURNER
A typical oil burner application is shown below.
When main switch is closed, heating of the oil in the oil preheater will begin.
Once the working temperature is detected, the oil preheater thermostat will activate the burner by means of
thermostat1 input at terminal 16.
Air simulation test is carried out before to activate the burner motor [K]
.
When air pressure is detected the pre-purge begins, ignition transformer is activated (long pre-ignition) and flame
simulation test is carried out.
The fuel valve
[V1]
will be activated only if the ignition device is detected during pre-ignition time. The fuel valve
remains open during the programmed 1
st
safety time, if a valid flame signal is detected within the safety time the
valve is kept open: the burner is on and after the pilot proving time the contact at terminals 11 will be closed.
If no flame is detected the system will lockout and contact at terminals 12 will be closed (lockout).
Push the front panel button or activate the input at terminal 14 to reset from lockout (will take place at release).
2
nd
stage burner control by means of Thermostat2 input at terminal 17.
Flame quenching during burner operation will force the system to lockout, recycle or ignition restoration.
To put the burner out of service (manual shutdown) push the front panel button during the operating cycle.
A post-combustion time (max 20 seconds) is allowed after a lockout or shutdown request, followed by post-purge.
Only UV sensor can be used for flame detection. Single UV sensor detecting both pilot and main flame.
Ignition restoration is not allowed for burners with a maximum throughput of > 30 kg/h.
LOW AIR PRESSURE SWITCH
1
ST
STAGE FUEL VALVE
K
POWER RELAY
2
ND
STAGE FUEL VALVE
M
BURNER MOTOR
2
ND
STAGE THERMOSTAT INPUT
OH
OIL PREHEATER
RESET INPUT
OW
PREHEATER THERMOSTAT
BURNER ON
IGNITION ROD
BURNER
LOCKOUT
UV SENSOR
MAKE JUMPER WITHOUT
AIR PRESSURE SWITCH
