User`s guide

67

PPC4000 Operating sequence
Assumptions:
PCV below cut-in PPC4000 control commissioned All limits satisfied
PPC4000 Burner on Switch
P0
wait for profile select
PPC4000 Op Control Relay (OCRC)
wait for purge
YB110-M selects profile PPC4000-Safety Rela
y
YB110-X move to damper open position
Servos move to P01
PPC4000-8 servos at damper open position Purge time begins servos exit open damper position
End of purge
YB110-12 begin low fire start P02, move servos to ignition position CES-D servos at i
g
nition
p
ositio
n
YB110 low fire start time ex
p
ire
d
CES D
servos at ignition position
YB110 low fire start time expired
YB110-5 Ignitor Xfrmr PTFI YB110-6 Pilot Valve MTFI YB110-7 Fuel Valve YB110-11 AUTO, move to modulation P03 to P23