Burner operation
During burner operation, the capacity controller controls the burner control, which
controls the servomotors. Servomotors adjust the gas regulator valve and air dampers
between partial load and full load according to the capacity demand (modulating gas
use). In oil use, the load controller module controls the burner at high-low control (2-
stage). The oil pump pressure is directed to the oil nozzles that generate the oil spray.
Incoming oil pressure to burner is mentioned in section
Oil pump
.
Burner shutdown
When the burner shuts down, the burner fuel valves close. Fuel supply closes. Finally,
the burner post-purge phase starts for a defined time period.
The burner must be connected to the oil circulation system according to
the oil supply diagram.
5.4 Legend to time sequence diagram symbols and safety
times
Pos.
Description
Factory setting
t1
Waiting time safety interlock chain (X06, burner)
-
t2
Leakage test of gas valves, V1 (filling the interspace)
2 s
t3
Actuators driving time
-
t5
Pre-purge (0 – 999 s)
30 s
t6
Pre-ignition (2 – 40 s)
3 s
t7
First safety time (ignition flame)
3 s
t8
Time of stabilization (ignition flame, 3 – 30 s)
3 s
t9
Second safety time (main flame)
3 s (gas)
5 s (oil)
t10
Operation phase
-
t11
Control phase (increases/decreases capacity)
-
t12
Emptying time of gas block interspace, V2
3 s
t13
Post-purge (0 – 999 s)
20 s
t14
Basic load-phase
-
t15
Afterburning time (0 – 180 s)
10 s
t16
Check-out time of flame extinction
5 s
t17
Leakage test time (5 – 999 s)
20 s
68 (95)
M5164 1640EN
Summary of Contents for GKP-50 MH
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