Dunkirk Excelsior EXB Series - Manual (Page 14)

14
NX Burner With Blocked Vent Safety (BVS) Operation
External Action Appliance Response
Power applied to burner control
Internal safety check conducted. If no light or fl ame is detected and all internal conditions are correct,
control enters idle mode.
Thermostat Calls For Heat
Call for heat is satisfi ed.
Reset button pushed two times
without device completing a call for
heat.
GeniSys 7505 Reset Button Operations
Pushing the reset button in the current state will cause the following conditions:
If the burner state is: Pushing the reset button < 1 second Pushing the reset button > 1 second
Push, hold reset button >15
seconds
Lockout Reset from Soft Lockout
Reset from Restricted (Hard)
Lockout
Valve On Delay, Trial For
Ignition, Ignition Carryover
Pump Prime Disable the Burner. Any time the
burner is running, press and hold the
reset button to disable the burner. The
burner will remain off as long as the
button is held.
Enables pump priming: After the
reset button has been held for 15
seconds the button can then be
clicked during the next ignition
sequence to enter pump prime
mode.
Run (igniter is shut off)
Yellow light fl ashes to indicate cad cell
resistance.
Motor-Off Delay, Standby No action
Pump Prime No action Exit pump prime mode and return to standby.
Status Lights
Light Color On Continuously Flashing
Red Restricted (Hard) Lockout Soft Lockout
Green
Flame Sense during normal operation.
May be stray light during standby.
Recycle
Yellow
Control is in Pump Prime mode OR
reset button is currently held for >15
seconds.
Cad cell resistance.
OPERATION AND TROUBLESHOOTING