Siemens LMU54 Series - Capacity Range > 120 Kw; Description of Sequence Diagrams

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Siemens Building Technologies Basic Documentation LMU54... / LMU64... CC1P7494en
HVAC Products 3 Functions 07.11.2002
22
0 1
2
3
654
10 Hz
11 Bw
12 Hz+Bw
20 2 4 7 21 99
HMI
display:
Phase
Home run
TLOTNB
Standby
ti
PH_TNB
tv TBRE
TW1
TW2 tvz tsa1 tsa2 tn
tsa
TNN tsa1 tsa2
tsa
THL2 tn
PH_TLO PH_TNN
PH_
STANDBY
PH_
STARTVER
PH_
THL1_1
PH_TV PH_TBRE PH_TW1 PH_TW2 PH_TVZ
PH_
TSA2_1
PH_TI
PH_
MODU-
LATION
PH_
THL2_1
PH_TN_1
PH_
TSA1_1
PH_
TSA2_2
PH_
TSA1_2
PH_
THL2_2
PH_TN_2
PH_
STOER
THL1
PH_
THL1_2
THL1 (TW1)
PH_TW1
7494f03e/0201
NoG_Null
BV
Ignition
LP (4)
NoG_Max
N_VL
N_TL
N_Vor
N_ZL
-N_TL_Delta
-N_ZL_Delta
+N_ZL_Delta
-N_Vor_Delta
+N_VL_Delta
dependent on
parameter
setting
LP (3)
LP (2)
ZZ
ZZ
ZZ
ZZ
Z
Z
PH_
THL2
Flame
PH_
TSA1_2
PH_
STANDBY
PH_
THL2
PH_
THL2
PH_
THL2
PH_
THL2
PH_
THL2
Z
Z
Z Z
Heat demand
R
Logic on
Logic off
On deviation
transition to home run
Deviation leads to lockout
On deviation transition to
specified or following
phase
Control
Permitted range
Prohibited range
-> Home run
Prohibited range
-> Lockout
Ideal signal
Transition criterion
Control signal
Triggering forced prepurging
Repetition can be parameterized,
then lockout
Z
Operation
dependent on
parameter
setting
dependent on
parameter
setting
dependent on
parameter
setting
dependent on
parameter
setting
dependent on
parameter
setting
The burner control’s program is subdivided into different phases. Each phase is
identified by a certain output and input configuration of the burner control.
For the precise sequence of signals, refer to the sequence diagrams.
Signal sequences not shown in the sequence diagrams are summarized under «Special
cases».
The times given in the sequence diagrams are distinguished as follows:
UPPERCASE LETTERS (e.g. «THL1») constants stored in ROM
Lowercase letters (e.g. «tsa») parameters stored in EEPROM
With regard to the speed feedback signal, the following nominal levels are used:
N_Vor, N_VL, N_ZL, N_TL
Prepurging Nominal load
1)
Ignition load Partial load
1)
Previously «Full load» (VL)
Sequence diagram
Capacity range > 120 kW
Description of sequence
diagrams