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Installation guide/Electronic part replacement (Not applicable for SIL2 devices)
Liquid Level Switch
Type LLS 4000 / LLS 4000U
Warning! This is a Class A device. This
device may cause radio interference in
residential areas. In case of interference,
the operator may be required to take
appropriate measures. This instrument
has to be mounted on a metallic tank.
The device is intended to be used in
industrial areas.
Fig. 1
Fig. 2
© Danfoss | Climate Solutions | 2024.07
M12 male Electrical
connector
Heat sink (insulation allowed, if media temperature
is less than ambient temperature)
Hexagon 32 mm
Process connection
G ¾" or ¾" NPT
Liquid sensing part
O-ring
Cover disassembled LLS
to avoid any access of
particles, moisture or
dirt
089 0879
AN331327770735en-000501 | 1
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Summary of Contents for Danfoss LLS 4000
- Page 1 Installation guide/Electronic part replacement (Not applicable for SIL2 devices) Liquid Level Switch Type LLS 4000 / LLS 4000U 089 0879 Warning! This is a Class A device. This device may cause radio interference in residential areas. In case of interference,...
- Page 2 3) Install a new O-ring carefully by using an appropriate O-ring tooling Fig. 3 Observe Red silicone plate does not fall out. Must be kept in its place, clean and not contaminated. Hand-tighten clockwise Fig. 5 Fig. 4 2 | AN331327770735en-000501 © Danfoss | Climate Solutions | 2024.07...
- Page 3 ** For failure types please connect the device to the Bluetooth App, enter fault state mode, and read the failure type *** Fault can be detected at any detected level, ie. 2 or all 3 lights on © Danfoss | Climate Solutions | 2024.07 AN331327770735en-000501 | 3...
- Page 4 LLS 4000 Observe! Always download or update to latest App version. Devices with Firmware PV01 (see product label) must be Firmware updated to latest rmware before con guration. Please contact Danfoss. Con guration Con gurable Pin code: 0000 4 | AN331327770735en-000501...
- Page 5 – It is highly recommended that calibration is done in gas. – Exception when LLS 4000/4000U is used for low level detection: If it is absolutely not possible to empty the stand pipe for liquid ammonia, it is acceptable to skip the calibration of the LLS 4000/4000U in gas.
- Page 6 - If media detection or non-detection by the level switch could generate a hazard the SIL version and speci c instructions described in the safety manual (periodic proof test) should be used. The SIL safety manual can be downloaded from Danfoss web site or by scanning the QR code below.
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