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Installation and configuration guide
HBX Vapor Quality sensor
Sensors for optimizing Evaporator Control, both for DX (direct expansion) and
overfeed - systems
For compressor protection and leakage detection (ammonia carbamate)
Angle strainer versions
Angle rod version
In-line version
Introduction:
The three different versions are available, with the same function. Pipe size and piping layout, bend or
straight, is different and suited for different applications. The strainer house version has one fixed flow di-
rection, whereas the two stainless versions accept flow in both directions.
HBX Vapor Quality Sensors measures the Vapor Quality of the refrigerant vapor leaving an evaporator and
use this signal for controlling the expansion valve. Thanks to the capacitive measurement principle it is able
to measure the liquid content of the fluid leaving the evaporator without pressure drop.
For "DX" systems the vapor quality sensor can replace the conventional superheat control and is able to re-
duce the superheat to zero. The sensor can control the valve directly or it can provide the high vapor quality
measurement for an external control system. The vapor quality sensor reacts instantaneously if the dryness
of the gas is changed in the evaporator outlet. Experience has shown that the entire system is in better bal-
ance with minimum variation in pressure.
In overfeed and flooded systems the sensor is able to measure the low vapor quality in the evaporator outlet
and control the circulation ratio (CR) by controlling the liquid valve or the pump capacity, either directly or
as an input for a PLC.
The sensor is manufactured in stainless steel or carbon steel and can be used for all commonly used refrig-
erants CO2, Hydrocarbons, ammonia, HFO's and HFC's with different settings. The HBX sensor is available in
several versions, with and without temperature sensor and cable for direct connection to an expansion valve.
Three types of expansion valves are supported: stepper motor, PWM pulse modulating ex. AKV valves and
modulating 4-20mA controlled expansion valve.
A special ATEX/IECEx (EEx ib IIC) version is available for use in special hazardous areas and with flammable
refrigerants. This product is only suited for external control and is not able to control an expansion valve di-
rectly.
HBX-all types installation and calibration manual 03
date: 26-06-2020
WWW.HBPRODUCTS.DK
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Table of Contents
Related Manuals for HB Products HBX
Summary of Contents for HB Products HBX
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Page 1: Introduction
HBX Vapor Quality Sensors measures the Vapor Quality of the refrigerant vapor leaving an evaporator and use this signal for controlling the expansion valve. Thanks to the capacitive measurement principle it is able to measure the liquid content of the fluid leaving the evaporator without pressure drop. -
Page 2: Table Of Contents
Intended use. The purpose of the HBX sensor is refrigerant measurement and control. If the HBX is to be used in a different way, prior, written consent must be obtained from HB Products. Repair: Any repair must be carried out by a trained professional. -
Page 3: Application And Mounting Strainer House Version
Sensor mounted in a strainer house (HBX-xxx-ST) The HBX-sensor is mounted after the evaporator and is able to measure the Vapor Quality (dryness) from 0.2 to 1. The output can be used as input to a PLC or it can control the expansion valve directly or both. The sensor is mounted in a strainer house where the strainer is replaced by the sensor. -
Page 4: Application And Mounting Straight Pipe Version
Sensor mounted in a straight pipe HBX in-line The HBX-sensor is mounted after the evaporator and is able to measure the Vapor Quality (dryness) from 0.2 to 1. The output can be used as input to a PLC or it can control the expansion valve directly or both. This sensor version is mounted in a straight pipe and it accepts flow in both directions. -
Page 5: Application And Mounting Angle Rod Version
Both pipes should be angled minimum downwards 1 degree or designed with a P-trap/drop-leg to secure drainage. Angle minimum 30 ̊ d ownwards HBX-all types installation and calibration manual 03 date: 26-06-2020 WWW.HBPRODUCTS.DK... -
Page 6: Installation Of Temperature Sensor
Unscrew the complete sensor part before solder- ing. Use two wrenches when dismantling and installing the HBX-Sensor. One to turn the sensor and one on to stabilize the steel block to avoid stress to the soldering's. Use thread sealant. -
Page 7: Removal Of Electrical Unit
Sensor configuration All HBX sensors can be calibrated using a PC and a, M12 -USB cable. The software can be downloaded freely on the HB Products web page. The configuration data can be stored in the sensor and will be there until erased without power con- nection—just like you store data on a memory stick. -
Page 8: How To Use The Sensor
A direct controller of an electrically controlled expansion or liquid valve version with a cable output that can be set up as a controller Select Control/Sensor to select the mode HBX-all types installation and calibration manual 03 date: 26-06-2020 WWW.HBPRODUCTS.DK... -
Page 9: How To Setup The Sensor As Input For A Plc
HB-products for this. After changing settings push the button ”Save to sen- sor” (the message ”OK” on the screen indicates that the set- tings are saved) Go to next page: Advanced settings HBX-all types installation and calibration manual 03 date: 26-06-2020 WWW.HBPRODUCTS.DK... -
Page 10: Advanced Settings For Sensor As Input For Plc Input
(copy data to a new sensor) Under the calibration tab, the sensor can to be set to flooded operation called “HBX-CR” or DX but it does not really matter when used for PLC input only. -
Page 11: Using The Sensor For Flooded Operation Together With A Plc
The “alarm delay in sec.” have to reflect the system and have to be as low as possible. The “alarm relay function” can be adjusted to either deliver a digital output or remove the signal when the limit is passed HBX-all types installation and calibration manual 03 date: 26-06-2020 WWW.HBPRODUCTS.DK... -
Page 12: Calibration Of Sensor
When the calibration is perfect, set the “degree of dryness “X” back to normal, and the “Minimum valve opening in %“ to normal and then unplug the PC, reconnect the nor mal M12 plug . HBX-all types installation and calibration manual 03 date: 26-06-2020 WWW.HBPRODUCTS.DK... - Page 13 The splitter box is not suited for normal operation, but only for installation and modification. The splitter box is connect- ed to the M12 plug on the HBX sensor and then both the pc and the normal M12 plug can be connected.
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Page 14: How Does The Expansion Valve Control Loop Work For Dx Operation
Normal operation stop kick- start period Valve opening Start with Wet sensor LL Alarm...0.900 Set.point.0 +5°K Dry sensor Time Voltage/signal on pin 5, Start/Stop Signal applied when the compressor starts/stops HBX-all types installation and calibration manual 03 date: 26-06-2020 WWW.HBPRODUCTS.DK... - Page 15 After a period the maximum capacity is reached and the HBX sensor begins to detect liquid and the opening of the expansion valve is reduced to “valve speed 1 open % in sec”.
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Page 16: How To Setup The Sensor As Direct Controller-Basic Settings
- please contact HB-products for this. After changing settings push the button ”Save to sensor” (the message ”OK” on the screen indicates that the settings are saved) Go to next page: Advanced settings HBX-all types installation and calibration manual 03 date: 26-06-2020 WWW.HBPRODUCTS.DK... -
Page 17: How To Setup The Sensor As Direct Controller-Advanced Settings
Load settings file is used to set up all parameters from an existing .hbp file (copy data to a new sensor )The con- tent can be read in a text program like MS word+ HBX-all types installation and calibration manual 03 date: 26-06-2020... -
Page 18: Controlling A Flooded Or Semi Flooded Evaporator
Under the calibration tab, the sensor has to be set to flooded operation called “HBX-CR” which is normally done at delivery. If this is not done or the sensor has to be used for another purpose it can be changed here. You start by ticking off the three small boxes to the right. -
Page 19: Connecting Diagram Stepper Motor
Connection diagram for HBX/S (stepper motor) with tempera- ture compensation — here shown with Carel E2V +24V DC or AC - Common AI Remote settings*/DO Alarm AO,4-20 mA level ** DI start stop Run IN signal 5 to 24 V... -
Page 20: Connecting Diagram Motor Valve
Connection diagram for HBX/C motor valve— here shown with Siemens MVS661 MVS661 motor valve -common - = White common + supply + = Brown Supply mA input AO = Gray , 4-20 mA mAoutput position Open/Close valve Motor valve: 4-20 mA 24 V DC, max 24 W... -
Page 21: Connecting Diagram Pulse Modulating
** When the sensor is very wet it will deliver 22 mA Note: • HBX-DX/C-R-3-X/PWM, with valve cable for easy electrical connec- ALARM tion. LIQUID • HBX-DX-R-3-X/PWM, without valve cable, then the PWM output is POWER connected to PIN3 (blue colour). HBX-all types installation and calibration manual 03 date: 26-06-2020 WWW.HBPRODUCTS.DK... -
Page 22: Connecting Diagram Plc And Atex/Ex/Iecex
The sensor with ATEX approval use a two wire connection. This means only two pins in the M12 connector are active and the output is a 4-20 mA analog signal. HBX-all types installation and calibration manual 03 date: 26-06-2020 WWW.HBPRODUCTS.DK... -
Page 23: Remote Setting
“degree of dryness “X”” of 0.8 you need to apply Remote signal: 20 — 16* (0.8-0.55) / (1-0.55) =7,5 mA Here the application DX or CR is selected minimum Current for Range maximum minimum minimum mA (20-4 )mA HBX-all types installation and calibration manual 03 date: 26-06-2020 WWW.HBPRODUCTS.DK... -
Page 24: Led Indications On Sensor Head
The sensor must be ordered for a specific refrigerant. It is possible to change the sensor to work with another refrigerant, but a full package of new settings have to be uploaded. HB products has the setting files for most refrigerants and you can get them on request.