HB Products HBLC Manuale utente
Rigid level sensor manual 01 May 2020 HBproducts.dk 1
Manual for rigid level sensors and controllers
Covers: HBLC, HBLT, HBSLC & HBSLT
For analog measurements of liquids like NH3, water, HFC/HFO refriger-
ants, CO2, Hydro carbons and alcohols.
Can be used in refrigeraon systems and similar demanding systems.
Introducon
HBLC, HBLT , HBSLC and HBSLT are intelligent liquid level sensors which can be installed in a vessels or in a standpipes. The
sensors can be mounted directly in a stand pipe or in a vessel. The HBLC and HBSLC are sensor without an external pipe
which means they measure between the sensor element and the vessel or standpipe whereas the other types has an exter-
nal pipe and measures between the inner rod and the outer pipe. Installaon and conguraon is similar for the two product
types and they share the electronic heads.
The sensor can be installed in refrigeraon systems and similar demanding applicaons with high pressures and aggressive
uids.
The sensors comes in dierent versions with or without a cable for direct valve control. All versions emits a 4-20mA analog
signal, which is proporonal or disproporonal to the liquid level, via the M12 plug. The sensors are available in special ver-
sions which contains a controller able to control a valve directly, without using a PLC.
ATEX/Ex versions included
Rigid level sensor manual 01 May 2020 HBproducts.dk 2
Table of contents
Introducon............................................................................................... 1
Safety Instrucons..................................................................................... 2
Applicaon Examples ............................................................................. 3-4
Installaon Instrucons............................................................................. 6
How to connect the sensor ....................................................................... 7
Connecon diagrams............................................................................ 8-12
Analog output.......................................................................................... 12
Use the HB-tool for seng up the sensor .......................................... 13-17
LED indicaon.......................................................................................... 18
Calibraon on the sensor ........................................................................ 18
Fault detecon ........................................................................................ 19
Sensor Repair........................................................................................... 19
Further Informaon................................................................................. 19
Safety Instrucons
CAUTION! Always read the instrucon manual before commencing work! Heed all warnings to the leer! Installaon of the
sensor requires technical knowledge of both refrigeraon and electronics. Only qualied personnel should work with the
product. The technician must be aware of the consequences of an improperly installed sensor and must be commied to
adhering to the applicable local legislaon.
If changes are made to type-approved equipment, this type approval becomes void. The product's input and output, as well
as its accessories, may only be connected as shown in this guide. HB Products assumes no responsibility for damages re-
sulng from not adhering to the above.
Explanaon of the symbol for safety instrucons. In this guide, the symbol below is used to point out important safety
instrucons for the user. It will always be found in places in the chapters where the informaon is relevant. The safety in-
strucons and the warnings in parcular, must always be read and adhered to.
Intended use, condions of use. The level sensor is de-
signed for connuous measurement of liquids, but please
note the sensor design and setup has to comply with the
liquid. The table show how sensors comply to liquids. It
can be used in refrigeraon systems and similar environ-
ments. If the sensor is to be used in a dierent way and if
the operaon of the product in this funcon is determined
to be problemac, prior approval must be obtained from
HB Products.
Prevenon of collateral damage Make sure that qualied
personnel assess any errors and take necessary precau-
ons before aempng to make replacements or repairs,
to avoid collateral damage.
Disposal instrucons: The sensor is constructed so that
the modules can easily be removed and sorted for dispos-
al.
CAUTION! Refers to a possible limitaon of funconality or risk in usage.
NOTE! Contains important informaon about the product and provides further ps.
The person responsible for operaon must commit to adhering to all the legislave requirements,
prevenng accidents, and doing everything to avoid damage to people and materials.
Comply
Not comply
Rigid level sensor manual 01 May 2020 HBproducts.dk 3
HBLC consist of a PTFE covered rod and requires a electrical connecon to the overow pipe or to the pipe segment where
it is installed. The sensor is more sensive to turbulent condions but with a high lter me it is able to control the level
even in turbulent condions. The simple design is less sensive to contaminaon compared to HBLT.
HBSLC connected to a modulang valve – an alternave to low pressure oat control.
An economiser with an HBSLC connected to the modulang valve, type Siemens MVS661.
Applicaon Examples HBLC and HBSLC
Rigid level sensor manual 01 May 2020 HBproducts.dk 4
HBSLT/C
Sensor with integrated cable
for direct control of 4-20 mA
controlled modulang valve
like Siemens MVS-series or
Danfoss ICM-series or similar.
LED display is included
HBSLT/S
Sensor with integrated cable
for direct control of stepper
motor valves. HBSLT/S-
version is without LED dis-
play.
HBLT and HBSLT are designed for level measurement of liquids and is typically used in chillers, pump separators,
coolers and condensers. The sensors can be mounted in vessels , containers and standpipes without an external
pipe.
Applicaon Examples
Sensor must have a minimum of 50
mm between the sensor end and
the boom of the pipe.
Standpipe should be insulated to
reduce boiling in the standpipe.
Drain pipe must be placed at an
angle of 5-10°, to avoid oil pockets
in standpipe as these cause inaccu-
rate measurement.
Rigid level sensor manual 01 May 2020 HBproducts.dk 5
Applicaon Examples HBLC and HBSLC
Level sensor installed in a standpipe connected to
a receiver.
Level sensor installed directly in a vessel
Rigid level sensor manual 01 May 2020 HBproducts.dk 6
Installaon Instrucons
Mount the sensor rod in a standpipe or vessel with the right thread connecon. Liquid sealant is used for sensors without
an outer pipe and the conic NPT thread. For the BSPP threads a washer is used. Teon tape can be used on versions with
an outer pipe.
CAUTION! In case of welding work on the unit, we recommend to remove the electronic head or at least to make sure that
proper earthing is carried out to avoid damaging the electronics.
Mounng instrucon
Teon tape can be used for HBLT and HBSLT
and products with an outer pipe
Mount the sensor on the ves-
sel. Torque 80-150 Nm.
Liquid sealant should be used for HBLC and HBSLC and
products with a rod without outer pipe
The electronic head is mounted and demounted using either the three pinon screws or a union. The threaded
union is mainly used on sensors for low temperature applicaons. The threaded union should be ghtened
rmly using a tool to secure good electrical contact and avoid loose connecons.
Rigid level sensor manual 01 May 2020 HBproducts.dk 7
How to connect the sensor
Three dierent type of sensors
• A simple sensor version with 4-20 mA output
• A advanced sensor version with 4-20 mA output, LED indications, display and multiple settings
• A controller version with both cable for direct valve control and analog output, LED indications, display and mul-
tiple settings
The M12 connection is also used for power supply. Some versions are able to control a valve directly. They have a ca-
ble, which can be connected directly to the valve.
PLC
PLC (oponal)
or
Power supply
Advanced version
• Analog output
• Advanced setup
• LED indicators
• Display (opon)
PLC
Simple version
• Analog output
• Simple setup
Controller sensor
• Analog output
• Advanced setup
• Display
• LED indicators
• Valve control
PLC
Circular head with ISO4400/DIN43650 connector
Large head with M12 EN61076-2 connector
With or without display and output cable
Rigid level sensor manual 01 May 2020 HBproducts.dk 8
+24V DC
- Common
DO, Alarm output
AO, 4-20 mA level
Communicaon only
1
5
4
3
2
PLC
+
-
DI
AI
DO
Connecon diagram for sensors without control
cable.
Suited for
• HBLC
• HBLT and HBLT-wire
Digital output on pin 3
The sensor versions without a cable has an alarm out-
put on pin 3. Remote setpoint is not available
Connecon diagram for simple sensor Suited for
• Sensors with simple electronic head
12
3
+24V DC
- Common
AO, 4-20 mA level
1
4
3
2
PLC
+
-
AI
Communicaon only
used for seng up and calibraon
Rigid level sensor manual 01 May 2020 HBproducts.dk 9
+24V DC
- Common
AI Remote set point 4-20 mA
AO, 4-20 mA level
Run in signal
1
5
4
3
2
PLC
+
-
AO
AI
DO
Color coding
A+ = yellow(2)
A- = white (4)
B- = green (1)
B+= brown (3)
The sensor has a build in controller for a stepper valve. The sensor pro-
vides both the analog output via the cable to control the valve. The lev-
el measurement signal for the PLC comes via the M12 plug .
On pin 3 it is possible to send an analog 4-20 mA signal to the controller
and change the setpoint. The signal is scaled linear like analog output.
The cable is connected according to the drawing and the parameters
are set as shown in the next secon.
For the stepper motor setup a
special menu is acvated
Connecon diagram for sensors with control ca-
ble for all common stepper motor valves — here
shown with Carel E2V
Suited for
• HBSLT/S and HBSLT–wire/S
• HBSLC/S
Note: The sensor is powered via
the M12 plug only. Do not supply
the sensor via the cable.
Rigid level sensor manual 01 May 2020 HBproducts.dk 10
+24V DC
- Common
AI Remote set point 4-20 mA
AO, 4-20 mA level
Run in signal
1
5
4
3
2
PLC
+
-
AO
AI
DO
Connecon diagram for sensors with control ca-
ble for pulse modulang valve — here shown
with Danfoss AKV/AKVA
The sensor has a build in controller for a pulse modulang valve. The
sensor provides both the analog output via the cable to control the
valve. The level measurement signal for the PLC comes via the M12
plug .
On pin 3 it is possible to send an analog 4-20 mA signal to the controller
and change the setpoint. The signal is scaled linear like analog output.
The cable is connected according to the drawing and the parameters
are set as shown in the next secon.
Suited for
• HBSLT/C and HBSLT–wire/C
• HBSLC/C
HBSSR box solid
state relay
Power input 24 to 240 V AC
Wiring using cable
Grey: Analog out
White: - common
Note: The sensor is powered via
the M12 plug only. Do not supply
the sensor via the cable.
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