Data Sheet

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Features

Data sheet

Liquid Level Switch

Type LLS 4000/4000U

AI323832972563en-000101 | 1

The LLS 4000/4000U liquid level switch is

designed to detect the state (gas or liquid) of the

refrigerant in front of the sensing head, while

installed in a wide range of refrigeration

applications.

The LLS level switch comes in 2 variants, LLS 4000

and LLS 4000U. They are identical except for the

connector thread interface to the system. The LLS

4000 is provided with G3/4" thread, while the LLS

4000U is provided with NPT 3/4" thread.

The LLS 4000/4000U liquid level switch is based

on the proven reflectometry measuring

technology(microwave level measurement)

adapted specifically for the new LLS 4000/4000U

switch.

LLS 4000/4000U liquid level switches can be used

to control the liquid level of many different

refrigerants in vessels, accumulators, receivers,

standpipes, etc.

The switches are normally installed in a pair of

two, controlling the upper liquid level and the

lower liquid level.

The level switch includes a relay that switches by

change in refrigerant state. The on site

configuration of the LLS allows the normally

open/closed relay setting depending on the

desired correlation.

For SIL applications a SIL2 version is available

with blocked configuration (not configurable).

All configuration and readings from the LLS

switch are performed through Bluetooth and a

downloadable special Danfoss app.

• Plug and play liquid level switch

• Easy installation and minimum or no need for

configuration

• Convenient communication with all units via

Bluetooth and a Danfoss app

• SIL2 compliant version

• 2 commonly used connection variants

• Maintenance free

• Replacement of electronic part without

removing mechanical part (no opening to

refrigerant)

• Applicable for ammonia and commonly used

H(C)FCs

• Well proven reflectometry measuring principle

• Approvals: CE, PED, EMC, RED, ROHS, SIL2, FCC,

( EAC, IC pending)

• Conforms to:

Telecommunications Directive RED 2014/53/EU.

Low voltage directive 2014/35/EU.

EMC directive 2014/30/EU.

ROHS 2011/65/EU

Summary of content (11 pages)

PAGE 1
Data sheet Liquid Level Switch Type LLS 4000/4000U The LLS 4000/4000U liquid level switch is designed to detect the state (gas or liquid) of the refrigerant in front of the sensing head, while installed in a wide range of refrigeration applications. The LLS level switch comes in 2 variants, LLS 4000 and LLS 4000U. They are identical except for the connector thread interface to the system. The LLS 4000 is provided with G3/4" thread, while the LLS 4000U is provided with NPT 3/4" thread.
PAGE 2
Data sheet | Liquid Level Switch, type LLS 4000/4000U Contents Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Product concept/applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Connection types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 3
Data sheet | Liquid Level Switch, type LLS 4000/4000U Product concept/ applications To control if a liquid level is within predefined allowed limits, two LLS 4000 are installed in an upper and a lower limit position respectively. By this setup the liquid level is between the two level switches and the lower switch will sense liquid, while the upper will sense gas. SVA In case the liquid level moves outside the limits, one of the switches will sense opposite and switch the built-in relay.
PAGE 4
Data sheet | Liquid Level Switch, type LLS 4000/4000U Beside the 2 versions the LLS also comes with 2 different thread types , LLS 4000 and LLS 4000U. They are identical except for the connector thread for installation to the system. The LLS 4000 is provided with G3/4" thread, while the LLS 4000U is provided with NPT 3/4" thread. Connection types LLS 4000 G 3/4” LLS 4000U NPT 3/4” For connection to the actual part of the system appropriate weld connectors are needed.
PAGE 5
Data sheet | Liquid Level Switch, type LLS 4000/4000U Electrical installation/ connection The LLS 4000 level switch must be installed as one unit (mechanical and electrical assembled) without disassembly to avoid the need for recalibration.
PAGE 6
Data sheet | Liquid Level Switch, type LLS 4000/4000U Level Voltage connected LLS LLS 4000/4000U 4000/4000U NO mode* NC mode* Green LED Level detection Yellow LED LLS Fault Red LED High Level sensor SIL2 fixed configura tion High Level sensor Low Level sensor Low Level sensor Voltage supply outside spec. LLS 4000/4000U fault** – – *** * Configuration dependent. Non-SIL2 fully configurable.
PAGE 7
Data sheet | Liquid Level Switch, type LLS 4000/4000U Ordering LLS 4000/4000U Description Code Number LLS 4000 liquid level switch (excl. welding connector & M12 cable) G 3/4" 084H6001 LLS 4000 SIL2 liquid level switch (excl. welding connector & M12 cable) G 3/4" LLS 4000U liquid level switch (excl. welding connector & M12 cable) NPT 3/4" 084H6002 LLS 4000U SIL2 liquid level switch (excl.
PAGE 8
Data sheet | Liquid Level Switch, type LLS 4000/4000U Maintenance/service & calibration precautions The LLS 4000 is considered maintenance free, but there are a few precautions that needs attention. The fins shall be kept free of dirt, dust, paint and oil etc. that potentially reduces the thermal heat transfer from the fins to the air. For LLS cleaning use soft cloth dry or wet or compressed air.
PAGE 9
Data sheet | Liquid Level Switch, type LLS 4000/4000U Bluetooth configuration The first time parameter setting of an individual LLS switch is done by opening of the app and performing a scan for devices. The app will get a list of LLS that are present at the actual location. The list will include a name and the matching serial number for each of the present LLS. The name and configurable parameters of any LLS can be changed at any time. 1.
PAGE 11
Data sheet | Liquid Level Switch, type LLS 4000/4000U Safety/ Approvals 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.