Danfoss LLS 4000, LLS 4000U Data sheet

Data Sheet

Liquid level switch Type LLS 4000 and LLS 4000U

Compact, cost-ecient, and reliable switch for liquid level measurements

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 G thread, while the LLS 4000U is provided with

3

NPT

⁄4” thread.

3

⁄4”

The LLS 4000/4000U liquid level switch is based on the proven reectometry measuring technology (microwave level measurement) adapted specically for the new LLS 4000/4000U switch.

LLS 4000/4000U liquid level switches can be used to control the liquid level of many dierent 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 conguration 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 conguration (not congurable).

All conguration and readings from the LLS switch are performed through Bluetooth and a downloadable special Danfoss app.

AI323832972563en-000401

Liquid level switch, type LLS 4000 and LLS 4000U

Features

• Plug and play liquid level switch

• Easy installation and minimum or no need for conguration

• SIL design with redundancy on microprocessor and relay

• Convenient communication with all units via Bluetooth and a Danfoss app

• SIL2 compliant version

• Two commonly used connection variants

• Maintenance free

• Replacement of electronic part without removing mechanical part (not applicable for SIL2 devices)

• Applicable for ammonia and commonly used H(C)FCs

• Applicable for R1234ze(E) with POE oils (miscible) or oil free systems

• Applicable for refrigerant oils in Ammonia and H(C)FC systems with a refrigerant gas temperature up to max. 80 °C

• For other medias and mixed medias, please contact Danfoss

• Well proven reectometry measuring principle

• Conforms to: Telecommunications Directive RED 2014/53 EU. Low voltage directive 2014/35/EU. EMC directive 2014/30/EU. ROHS 2011/65/EU

• Approvals: SIL2, FCC, IC, EAC, UA, CMIIT, ANATEL, NBTC CRN

Liquid level switch, type LLS 4000 and LLS 4000U

Applications

To control if a liquid level is within predened 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.

In case the liquid level moves outside the limits, one of the switches will sense opposite and switch the built-in relay. This relay switch function should be used for alarm settings. This is made easy when connected to the system PLC.

Figure 1: LLS locations



NOTE:

The LLS can be used wherever liquid levels of selected refrigerants and refrigerant oils must be controlled.

ABC

Upper LLS 4000/U

Lower LLS 4000/U

Liq. Level

A B

Danfoss

60L9031

ABWith liquid

Without liquid

Liquid level switch, type LLS 4000 and LLS 4000U

Figure 2: LLS orientation

 NOTE:

Horizontal installation recommended. Vertical or inclined installation not recommended: * Risk of Gas Pockets

The LLS comes in two versions:

• A standard version, which is applicable for most refrigeration or processing plants, and is fully congurable regarding type of liquid and relay setting.

• A SIL2 version applicable for SIL compliant process plants. This version is non-congurable regarding relay setting (see Congurable parameters) and is intended specic as the upper level switch.

Measuring principle

The measurement principle of the LLS is based on reectometry with a 4.8 GHz to 6.4 GHz linear sweep (Microwave switch technology). The reected signal is characterized by a resonance frequency.

The resonance frequency in air is taken as a reference (f the resonance frequency is shifting to a lower frequency. This is due to the change of the dielectric constant of the medium.

The point level switch monitors the resonance frequency and indicates whether the sensing element is surrounded by liquid or gas. The gure below shows the reference frequency with air (dielectric constant εr=1) in front of the sensing element and with a liquid dielectric constant εr>1.35.

Figure 3: Reference frequency

). When the sensing element is in contact with the liquid,

ref

Media

Saturation temperature range

Ammonia and listed H(C)FCs and HFOs.

NOTE: For other medias and mixed medias, please contact

Danfoss.

R717 (Ammonia)

-50 °C – +105 °C (-58 °F – +221 °F)

R22 (HCFC)

-50 °C – +86 °C (-58 °F – +187 °F)

R507A (HCFC)

-50 °C – +60 °C (-58 °F – +140 °F)

R134a (HFC)

-50 °C – +91 °C (-58 °F – +196 °F)

R404A (HFC)

-50 °C – +63 °C (-58 °F – +145 °F)

R407A (HFC)

-50 °C – +72 °C (-58 °F – +162 °F)

R410A (HFC)

-50 °C – +61 °C (-58 °F – +142 °F)

R513A (HFC)

-50 °C – +83 °C (-58 °F – +181 °F)

R1234ze(E) (HFO)

(1)

-50 °C – +85 °C (-58 °F – +185 °F)

PAO (Oil)

(2)

Max 5000 cP and +120 °C (Max 5000 cP and +248 °F)

POE (Oil)

(2)

Max 5000 cP and +120 °C (Max 5000 cP and +248 °F)

Mineral (Oil)

(2)

Max 5000 cP and +120 °C (Max 5000 cP and +248 °F)

Liquid level switch, type LLS 4000 and LLS 4000U

Media

Refrigerants

Table 1: Approved media

(1)

R1234ze(E) with POE oils (miscible)

(2)

When detecting oils in Ammonia, H(C)FC and HFO systems, the refrigerant gas temperature above the oil must be lower than 80 °C

New refrigerants

Danfoss products are continually evaluated for use with new refrigerants depending on market requirements.

When a refrigerant is approved for use by Danfoss, it is added to the relevant portfolio, and the R number of the refrigerant (e.g. R513A) will be added to the technical data of the code number. Therefore, products for specic refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.

Features

Specications

Supply

24 V DC +/-25%, 80 mA Standard power supply of type: SELV (Safety Extra Low Voltage) with current limit of max. 8A.

Relay (Solid state)

Max 30 V DC, 200 mA Same power supply as to supply can be used. Observe: In applications with request for SIL2, another separate SELV power supply may be needed.

Min. cycles: 1.000.000 Default delay between detection and relay switching: PV02: 1 seconds PV03: 2 seconds Product Version number can be found on product label. See Figure 9: Nameplate Actual delay highly inuenced by media viscosity and shall be validated before commissioning.

Overvoltage category

Category II for supply and output

Electrical connection

M12 (4 pins) male on the device

Measuring technology

Microwave reectometry (Not TLPR category)

Communication option

Bluetooth comply to ETSI EN 300 328

Features

Specications

Max. medium viscosity

5000 cP (Un-detection is delayed up to 20 seconds)

Max. working pressure

140 bar (2030 psi)

Ambient temperature range

-40 °C – 65 °C (-40 °F – 149 °F)

Medium temperature range

-50 °C – 120 °C (-58 °F – 248 °F) Observe restrictions on saturation temperature for approved medias

Operating environment

Pollution degree 3, altitude 2000 max., outdoor use Relative humidity RH4 to RH99 % (IEC 60721-3-4: 1995 Class 4K4)

Connection type

G ¾” or NPT ¾”

Weight

350 g (0.77 lb)

Enclosure rating

IP 66 / IP 67 IEC 60529: 1989 + A1: 1999 + A2: 2013 NEMA 250: 4X

Housing material (electronics)

Transparent and UV resistant. Compliance with IEC 60695-11-10, UL 94 HB

Housing material (mechanics)

Stainless Steel 316L

Vibration resistance

Long term random 7,54 g RMS (Curve A, IEC 60068-2-64) Level on pipes and brackets in direct and immediate vicinity of motors, compressors etc

Resonance frequency

600 – 650 Hz

Liquid level switch, type LLS 4000 and LLS 4000U

Product specication

Electrical data

Table 2: Electrical data

Mechanical data

Table 3: Mechanical data

3

9

7

2

5

4

6

8

1

Pos

Item

Material

Qty.

(1)

1

Housing

Cast Iron, zinc chromated, EN-GJS-400-18-LT

1

2

LLS 4000/U

Stainless Steel

1

3

Top cover

Cast Iron, zinc chromated, EN-GJS-400-18-LT

1

4

Alu gasket

Aluminium

2

5

Plug

Stainless Steel

1

6

Flange bolts

Stainless steel, A2-70 (DIN 267-11) / ASTM A-276

8

7

Gasket

Fiber, non asbestos

1

8

Flange gasket

Fiber, non asbestos

2

9

Top cover bolts

Stainless steel, A2-70 (DIN 267-11) / ASTM A-276

4

Pressure range

AKS 38 housing is designed for a max. working pressure of 28 barg / 406 psig

Temperature range

-50 °C – 65 °C / -58 °F – 149 °F

Red

White Green

Black

1

24 V DC

*A

Liquid level switch, type LLS 4000 and LLS 4000U

LLS 4000 Retrot AKS 38 kit

Figure 4: Material AKS 38 Retrot housing

Table 4: Material/Technical data AKS 38 Retrot housing

(1)

QTY included in LLS 4000 Retrot AKS 38 kit

Wiring diagram

Figure 5: Wiring diagram

 NOTE:

*A. Coil voltage must match supply voltage

LLS 4000

LLS 4000U NPT ¾”

G ¾”

Weld

connector

25 mm

1 in

min.

Ø30 mm min. No reduction

45 mm

1.8 in max.

Area where insulation is allowed, if media temperature is less than ambient temperature

Liquid level switch, type LLS 4000 and LLS 4000U

NOTE:



For ON/OFF level control with 1 x LLS 4000 an externally time delay may be used. The time delay shall be set with care and provide a dierential NOT higher than 50 – 75 mm under all operating conditions.

Connection types

Beside the two versions the LLS also comes with two dierent 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 G while the LLS 4000U is provided with NPT

For connection to the actual part of the system appropriate weld connectors are needed. Danfoss oers weld connectors for both G and NPT

Figure 6: LLS 4000/4000U installation

3

⁄4” thread as accessory. Please note geometric restrictions below.

3

⁄4” thread.

3

⁄4” thread,

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.

For powering the device, a low power source (LPS) must be used with safety extra low voltage output (SELV) and current limited to 8A maximum.

After connecting the M12 female cable to the power supply and relay circuit the M12 plug can be installed on the M12 male connector and the power can be switched on.

At this stage the green light LED will turn on and be visible through the transparent housing (see Figure 8).

The LLS is now ready for conguration via the Danfoss Bluetooth app (see Congurable parameters).

Danfoss M12 cables (ordered separately) M12 straight cable female x 2 meter, M12 straight cable female x 8 meter (M12 angle cable are not recommended)

1

2

3

4

+ Red

- White

Green

Black

Relay: 30 V DC

200 mA

24 V DC

+/- 25%

Red light LED

Yellow light LED

Green light LED

Liquid level switch, type LLS 4000 and LLS 4000U

Figure 7: M12 cable connection

LED light indicators

Figure 8: LED position

There are three LED indicators inside the LLS 4000 behind the transparent cover.

• Green indicates the state of power to the switch

◦ If ashing: Bluetooth connection is established

• Yellow indicates if liquid is in front of switch

• Red indicates if alarm is present

Congurable parameters

The set-up of the LLS 4000 is easy and simple, since only few parameters in the LLS software are congurable.

These are:

• Media type - Ammonia, HFC, HCFC; HFO or Oil. Factory default: Ammonia

• Relay NO (normally open when no liquid) or NC (normally closed when no liquid). Factory default: Normally closed

For plants where factory defaults are valid, the installation and set-up is simply Plug & play.

Table 5 shows possible congurations, relay state for given conguration/liquid level and LED indications.

Level

Open at no Liquid

(Normally Open)

(1)

Closed at no Liquid

(Normally Closed)

(1)

Voltage con‐

nected

Level detec‐

tion

LLS Fault

Green LED

Yellow LED

Red LED

High Level sensor

SIL2 fixed

configuration

(2)

Low Level sensor

(3)

Voltage supply outside spec.

LLS 4000/4000U fault

(4)

(5)

Liquid level switch, type LLS 4000 and LLS 4000U

Table 5: Conguration chart

(1)

Conguration dependent. Non-SIL2 fully congurable. SIL2 xed conguration and only applicable for High Level sensor

(2)

Not recommended in these applications: A High Level Alarm may not be registered at a power failure

(3)

Not recommended in these applications: A Low Level Alarm may not be registered at a power failure

(4)

For failure types please connect the device to the Bluetooth App, enter fault state mode, and read the failure type

(5)

Fault can be detected at any detected level, ie. two or all three lights on

Maintenance/service & calibration precautions



NOTE:

The LLS 4000 is considered maintenance free, but there are a few precautions that needs attention.

The ns shall be kept free of dirt, dust, paint and oil etc. that potentially reduces the thermal heat transfer from the ns to the air.

For LLS cleaning use soft cloth dry or wet or compressed air.

If the electronic part is separated from the mechanical part during installation, service or maintenance, the ingress of any foreign substances to the electronic or mechanical part shall be avoided.

Generally the separating of electronic and mechanical parts should be avoided due to calibration, and the mixing of mechanical and electronic parts from dierent switches must be avoided. In case of the incident mixing of mechanical and electronic parts from dierent switches, subsequent recalibration might be required.

Prior to calibration the following must be ensured: The LLS must be out of liquid state (in gas phase), otherwise the calibration might end up incorrect.

This can be secured by either emptying the actual vessel or uninstall the LLS to ambient air.

While in “dry” surroundings, connect power to the LLS switch and perform the calibration.

The Danfoss LLS app includes the calibration possibility. Calibration is not applicable for devices congured for SIL2 devices).

Ice build-up on the LLS switch reduces the accessibility for the Bluetooth connection.

• 10 cm icecap reduces the distance from app device to the LLS to 1 meter

• 20 cm icecap is considered as the maximum to be able to connect

Liquid level switch, type LLS 4000 and LLS 4000U

Ice as such do not impact the functionality of the product as far as the minimum ambient temperature is respected.

Bluetooth communication

• A special Danfoss LLS app can be downloaded from Android google play or IOS app store.

• All communication with all LLS installed in a plant is done by use of this app. Communication can only happen with one LLS at a time.

• Each LLS switch includes its own serial number, which will appear in the app when connected. At the same time the green light LED in the actual connected LLS will be ashing.

Bluetooth® word mark and logos are registered trademarks of Bluetooth SIG Inc.

Android and Google Play are registered trademark of Google LLC. App Store is registered trademarks of Apple Inc.

Bluetooth conguration

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.

The rst 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 congurable parameters of any LLS can be changed at any time.

1.

Choose the rst item on the list and observe which LLS’ green LED is ashing

2.

Log-in with the provided PIN code. (Default code is 0000. For safety reason the PIN code should be changed afterwards)

3.

Touch the Menu Icon

4.

Touch the Log-in

5.

Enter the Password provided

◦ Default code is 12131400. For safety reason the Password should be changed afterwards

6.

Rename the device to an up to 24 symbol name (8 symbols displayed)

7.

Check the parameter settings and if needed change one or both parameters Media type/ Switch state.

◦ Changing media type may require a restart (power o/on) of the LLS 4000/U

8.

Note the ID: Name, serial number, media type and switch state

9.

Close the app and observe that the green light stops ashing

10.

This LLS is now ready for operation

11.

If more LLS are present choose the next item on the list and repeat steps 1 to 10

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.

Read and apply safety instructions contained in product documentation

S/N: Supply: 24 V DC Connection type: MWP (PS): 140 bars Process temp IP66/IP67 MD: FCC ID:

ANATEL ID: 14992-20-10104

IC ID: 1991D-SWSILBT01 CMIIT ID: 2020DJ7335

xxxxxxxxxxxxxxxx

xxxxxxxxx

xxxxxxxx

MADE IN FRANCE

Danfoss A/S, 6430 Nordborg, Denmark

lbl. nr. FZ 4007312201

xxxxxxxxxxxxxxxx

xxxx/xx

x

xxxxxxxxxxxxxxx

Q6BSWSILBT01

PV02

-50 °C to +120 °C

xxxxxxxx

xxxxxxxx / xxxx

80 mA

Direct current

Liquid level switch, type LLS 4000 and LLS 4000U

General warnings/precautions

• Every use that is not described in this data sheet is considered incorrect and is not authorized by the manufacturer.

• The LLS device should only be used with approved media listed under Technical data. Use with other media must be validated by Danfoss before installation.

• Verify that the installation and operating conditions of the device respect those specied in this sheet, especially concerning the supply voltage and environmental conditions.

• All service and maintenance operations must be performed by qualied personnel.

• Installation must comply with local standards and legislation.

• Before carrying out any maintenance operations on the device, disconnect the device from the main power supply.

• Before unscrewing the LLS device from the pipe or tank ensure that pipe or tank is empty and not under pressure.

• Liability for injury or damage caused by incorrect use of the device lies solely with the user.

• Depending on the application, the metallic part of the instrument may be hot or cold.

• 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 the Danfoss web site.

Figure 9: Nameplate



NOTE:

Contact : Danfoss A/S, 6430 Nordborg, Denmark

USA/Canada:

This device complies with Part 15 of the FCC Rules and with RSS-210 of Industry Canada. Operation is subject to the following two conditions.

1.

This device may not cause harmful interference.

2.

This device must accept any interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.

2

05

m

[8

in

]

140 mm

[51/2 in]

220 mm

[8 5/8 in]

88

m

[3

1/

2

in

]

50

m

[2

in

]

2

9

m

[1

1

/

8

in

]

LLS 4000 [mm]

LLS 4000U [in]

M12x1

G3/4

36

H32

71,32

34

2015

142,4

19,5

Danfoss

60L9032

Danfoss

60L9033

2.80.78

3/4 NPT

H32

1.4

5.6

M12x1

0.77

0.6

Weight: approx. 350 g / 0.77 lbs

A- A ( 1 : 1 )

A

30 mm

[ 1 1 /8 in]

2

0

m

[

3

/

4

i

n

]

4

,

8

m

[

1

3

/

4

i

n

]

Danfoss

60N9036

Liquid level switch, type LLS 4000 and LLS 4000U

This device complies with FCC and ISED RF radiation exposure limits set forth for general population. This device must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.

The Product Marketing name of the instrument is ‘LLS 4000 series’.

Dimensions and weights

Table 6: Dimensions and weights

Figure 10: Weld connector ¾" G or NPT female

Figure 11: LLS 4000 Retrot AKS 38 kit

Description

Code Number

LLS 4000 liquid level switch (excl. welding connector & M12 cable) G ¾”

084H6001

LLS 4000 SIL2 liquid level switch (excl. welding connector & M12 cable) G ¾”

084H6002

LLS 4000U liquid level switch (excl. welding connector & M12 cable) NPT ¾”

084H6003

LLS 4000U SIL2 liquid level switch (excl. welding connector & M12 cable) NPT ¾”

084H6004

Description

Code Number

Weld connector G ¾”

084H6012

Weld connector G ¾” Stainless Steel

084H6014

Weld connector NPT ¾” (excl. teon tape)

084H6015

LLS 4000/U Electronic top part (not applicable for SIL2 device)

084H6010

M12 Danfoss female straight cable, 2 meter (6.6 ft)

034G2201

M12 Danfoss female straight cable, 8 meter (26.2 ft)

034G2200

LLS 4000/U Inspection sealing kit

084H6011

Description

Code Number

LLS 4000 Retrot AKS 38 kit incl. 1 x LLS 4000 G ¾”

148H3504

AK-PS 075, 0,75A/100-240V 50/60Hz Power Supply

080Z0053

Liquid level switch, type LLS 4000 and LLS 4000U

Ordering

Table 7: LLS 4000/4000U

Table 8: Spare parts / Accessories

Table 9: AKS 38 Retrot

Radio Equipment Directive (RED) 2014/53/EU EN 300 328 V2.1.1

EN 62311: 2008

Low voltage directive 2014/35/EU

EN 61010-1 (edition III)

EMC directive 2014/30/EU

EN 61326-1: 2013

PED

2014/68/EU, A4P3

ROHS 2011/65/EU 2011/65/EU

2015/863/EU

Approvals

CE: PED, EMC, RED, RoHS, LVD CRN SIL2 FCC IC EAC UA CMIIT ANATEL NBTC

Liquid level switch, type LLS 4000 and LLS 4000U

Certicates, declarations, and approvals

The list contains all certicates, declarations, and approvals for this product type. Individual code number may have some or all of these approvals, and certain local approvals may not appear on the list.

Some approvals may change over time. You can check the most current status at danfoss.com or contact your local Danfoss representative if you have any questions.

Table 10: EU conformity

Table 11: Approvals

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Danfoss LLS 4000, LLS 4000U Data sheet

Specifications and Main Features

Frequently Asked Questions

User Manual