
34/301
Siemens Building Technologies
Basic Documentation LMV5...
CC1P7550en
HVAC Products
4 Burner control
13.08.2004
4 Burner
control
4.1 Description of inputs and outputs
This chapter describes the basic characteristics of the burner control’s inputs and out-
puts. For the valuation of the inputs and activation of the outputs, refer to the «Se-
quence diagrams».
The following connection facilities are provided:
•
QRI... (infrared flame detector) for continuous or intermittent operation
•
Ionization probe for continuous or intermittent operation
•
QRB... flame detector for intermittent operation only
Continuous operation with the QRB… is
not
possible!
Do not
use terminal X10-02/1. This also applies to the connection of idle
lines if the LMV5... is used for continuous operation!
< 100 %
t
5 V
21 V
t
Test time
7550d20E/0502
Signal
voltage
Self-test
voltage
Operating
voltage
14 V
400-600 ms
<
The self-test function of the QRI... is triggered by increasing the supply voltage to the
level of self-test voltage.
During the following test time, the signal voltage at the output of the QRI... changes to
zero so that the LMV5… will receive the anticipated flame OFF signal as a response to
the test.
If the behavior is correct, operation is continued until the next test cycle is reached.
The test cycle is dependent on the parameterization of the LMV5...
The hardware of the LMV52... assigns the flame signals to 2 channels (channel A for
QRI... or QRB..., and channel B for ION).
The connection / processing of the individual flame signals are selected via 6 parame-
ters («Pilot phase», «Operating phase», «Extraneous light» – for both gas and oil fir-
ing).
The pilot phase covers Phases 40 through 50 and the operating Phases 52 through 62.
In all the other phases, the flame signal(s) is (are) evaluated via parameter «Extrane-
ous light».
Flame signal input
and flame detector
X10–01 and X10–03
Self-test function
LMV5... / QRI...
Separate flame
supervision,
only with LMV52...