Siemens LMS14 User Manual

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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
Description of sequence diagrams
The burner control’s program is subdivided into several phases. A phase is
characterized by a certain output and input configuration of the burner control. For the
correct sequence and progression of signals, refer to the sequence diagrams. The
progression of signals not shown in the sequence diagrams is summarized under
Special cases.
According to the sequence diagram, there is a permitted tolerance band with a
corresponding limit for each level (e.g. Maximum speed required for ignition). The
tolerance band is defined via parameter delta*. The limits are interrogated in the
relevant sequence phases (refer to Sequence diagrams).
Example:
Ignition load Upper limit = N_ZL (9513) + delta
Lower limit = N_ZL (9513)  delta
In addition, the limit values are complemented by NoG_Null and NoG_Max (refer to
Sequence diagrams).
NoG_Max is the maximum speed which must never be reached. NoG_Null is the speed
that must not be exceeded when changing to the Standby position.
Program times of sequence diagrams
Time Min.
(s)
Max.
(s)
Response
at the end
Designation
TNB 0.2 120
Lockout
position
Afterburn time
TLO 0.2 51.0
Lockout
position
Open air pressure switch (fan overrun
time)
TNN 0.2 51.0
Lockout
position
Up to speed = 0 (fan overrun time)
THL1 0.2 51.0
Lockout
position
1st fan ramp-up time
THL2 0.2 51.0
Lockout
position
2nd fan ramp-up time
Tv (t1) 0 51 Switching Prepurging
TBRE 0.2 51.0
Lockout
position
Fan deceleration time to ignition load
TW1 0.2 51.0
Lockout
position
Waiting for internal sequence, fan speed
adjustment and combustion optimization
Tvz
0.2 20 Switching Preignition time
TSA
1.8 9.8
1)
Safety time start
TSA1
0.2 9.6
1)
Safety time with ignition
TSA2 0.2 TSA-TSA1
1)
Safety time without ignition
Ti (t4) 0.2 10 Switching Interval operation with ignition load
TKT 0
Must be
defined
no Chimney drying
1)
Lockout or repetition, depending on the flame signal and the parameters, plus a number of
parameter setting choices (refer to the relevant description)

Siemens LMS14 Specifications

General

Brand	Siemens
Model	LMS14
Category	Control Unit
Language	English