Siemens LMV37.4 Series User Manual

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Building Technologies Basic documentation LMV37.4... CC1P7546en
7 Basic unit LMV37.4 17.12.2018
7.5.4.12. Postpurging in the lockout position
Parameter 190 can be used to move the actuators (actuators or VSD) to the postpurge
position while they are in the lockout position.
No. Parameter
190 Postpurging in lockout position
0 = deactivate (no-load position)
1 = active (postpurge position)
When active, the Alarm in the event of start prevention function (parameter
210) is only possible to a limited extent!

Note!
The LMV37.4 simply moves the actuators (actuators or VSD) to the postpurge
position. A fan or VSD release contact cannot be controlled, as the alarm relay of the
LMV37.4 cuts off the power supply to the outputs. With the Alarm in the event of start
prevention function, an external circuit that may be present for controlling the fan /
VSD release contact for postpurging in the lockout position is activated via start
prevention in standby mode.
LMV...
Bild 429e/0913
X3-05
K1
N
K2
N
K3
N
K2
K3
K1
L
Fan normal operation
Fan continuous purging
Figure 38: Application example of postpurging in the lockout position with fan but without VSD
The duration of postpurging in the lockout position can be set via the delay time of K3.
Attention!
When the Postpurging in the lockout position function is used, the fan may only
be powered via a contactor and must not be connected directly to LMV37.4 (X3-
05 pin 1)!
K1
22
9
5
21
3
4
+24 V
+
Setpoint 0...10 V
Siemens Micromaster 440
K1
28
LMV...
Bild 430en/0517
X3-05
K1
N
K2
N
K3
N
X74 pin 1 DC 24 V external
X74 pin 3 VSD control DC 0/2...10 V
X74 pin 2 signal reference
X3-05 pin 1 fan motor contactor
K2 K3
Fan normal operation
Fan continuous purging
Standardization
of speed
Figure 39: Application example of postpurging in the lockout position with fan and VSD release contact
The duration of postpurging in the lockout position can be set via the delay time of K3.
Attention!
When the Postpurging in the lockout position function is used, the fan may only
be powered via a contactor and must not be connected directly to LMV37.4 (X3-
05 pin 1)!

Siemens LMV37.4 Series Specifications

General

Brand	Siemens
Model	LMV37.4 Series
Category	Controller
Language	English