Siemens Building Technologies
HVAC Products
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... / LAL4..., a voltage signal is fed to terminal 12
11/20
CC1N7153en
14.10.2002