Bentone B40 - Page 38

38
Bentone B 30/B 40 J/K
t3n Postignition time
- «Z» must be connected to terminal 15
- With short preignition, «Z» remains on until «TSA» has elapsed
 connection to terminal 16
t4 Interval «BV1 – BV2» or «BV1 - LR»
- On completion of «t4», voltage is present at terminal 19
- The voltage is required to power «BV2» connected to auxiliary switch «v» in the
actuator
t5 Interval
- On completion of «t5», terminal 20 receives power. At the same time, control
outputs 9 to 11 and input 8 are galvanically separated from the LAL...’s control
section
 LAL... is now protected against reverse voltages from the load control circuit
- With the release of «LR» at terminal 20, the startup sequence of the LAL... ends
- After a few idle steps (steps with no contact position changes), the sequence
switch switches itself off
B Operating position of the burner Burner operation
B-C Burner operation
- During burner operation, «LR» drives the air damper to the nominal load or low-fire
position, depending on heat demand
- Release of the nominal load takes place via auxiliary switch «v» in the actuator
- In the event of loss of flame during operation, the LAL... will initiate lockout
- For automatic start repetition, the clearly marked wire link «B» on the plug-in
section of the LAL... must be cut away
C Controlled shutdown
In the case of controlled shutdown, «BV...» will immediately be closed. At the same
time, the sequence switch is started to program «t6».
C-D Sequence switch travels to start position «A»
t6 Postpurge time
- Fan «M2» connected to terminal 7
- Shortly after the start of «t6», terminal 10 receives power
 air damper is driven to the «MIN» position
- Full closing of the air damper starts only shortly before «t6» has elapsed
 initiated by the control signal at terminal 11
- During the following burner off time, terminal 11 is live
t13 Permissible afterburn time
During «t13», the flame signal input may still receive a flame signal
 no lockout
D-A End of control program
 start position
As soon as the sequence switch has reached the start position – having thereby
switched itself off – the flame detector and flame simulation test will start again.
During burner off times, the flame supervision circuit is live.
When the start position is reached:
With LAL1..., a voltage signals is fed to terminal 4
With LAL2... / LAL3..., a voltage signal is fed to terminal 12