© 2016
CONTRIVE • B14
88|
QBK
.EN
0219
15
www.contrive.it
DUAL STAGE BURNER WITH INDEPENDENT FLAME SENSOR
When two independent sensor are required for dual stage burners, the input at terminal 17 can be configured to
receive a contact from an external flame relay used for the 2
nd
stage burner.
When external contact from independent flame surveillance is closed the last indicator of flame signal bargraph is
permanently on (full scale).
A flame simulation lockout occurs when a flame is detected by sensor while related fuel valve is closed.
Pilot burner flame signal strength reported when only the pilot flame is detected.
WARNING
The flame sensor wired at terminal 17 must be certified for permanent operation if the main burner remains
operative longer than 24 hours.
Using a standard flame relay (i.e.: our FREY), the main burner must be turned off
within 24 hours of continuous operation (non permanent operation of main burner).
EXTERNAL LIMITS
RESET INPUT
LOW AIR PRESSURE SWITCH
AIR CONTROL INPUT
AIR VALVE
ON/OFF THERMOSTAT INPUT
PILOT GAS VALVE
MAIN BURNER FLAME
INPUT
MAIN GAS VALVE
BURNER ON
SINGLE ROD CIRCUIT (PILOT)
BURNER LOCKOUT
EXTERNAL FLAME RELAY
MAKE JUMPER A1
-A2 WHEN
LOW AIR PRESSURE SWITCH
IS NOT INSTALLED
UV SENSOR (MAIN)
