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