Advertisement
Limit/Power Switch ON
CONTROLLER ON
BLOWER
IGNITION TR
L
PILOT VALVE
O
A
D
MAIN VALVE
ALARM
HIGH
DAMPER
LOW
AIR FLOW SW
FLAME SIGNAL
POWER
I
PRE/POST-PURGE
N
D
IGNITION TRIAL
I
C
PILOT ONLY
A
M-TRI/M-STA
T
I
RUN
O
N
FLAME
ALARM
High
Low
Interlock ON
Interlock ON
Pre-Purge
Fig. 5: Normal operation
CONTROLLER OFF
Ignition Trial
Pilot-Only
Main Trial
Main Stabilized
Modulating
Ignition Wait
Post-Purge
ENS7003R0 KO06 2010
Advertisement
