Haier HBX-IC ULT Backup Refrigerator System Instruction Manual

Haier HBX-IC ULT Backup Refrigerator System

Product Information

The ULT Backup Refrigerator System is a liquid CO2 freezer backup system that provides a reliable backup power source for your refrigerator during power outages. The system comes with a main power switch, a system battery switch, a standby test key, and indicator lights for low carbon dioxide and low battery. The temperature display and indicator light on the control panel show the actual temperature in the storage cabinet.

The system requires AC 220-240V, 50/60Hz power input and uses liquid CO2 as a cooling agent. The tank pressure must be maintained above 35 bar for proper cooling. The system comes with installation instructions for connecting the input and output pipes.

Product Usage Instructions

1. Read the Operation Manual carefully before using your appliance. Keep the Operation Manual in a safe place. Connect the power cable to an easily accessible power outlet. The plug on the power supply cord can be used as a disconnect device.
2. Turn on the main power switch for the system to operate properly. The temperature display and indicator light on the control panel will show the actual temperature in the storage cabinet.
3. Ensure that the system’s battery switch is turned on. During a power outage, the battery can supply power to run the backup system.
4. Use the standby test key to activate the solenoid valve temporarily to ensure the flow of cryogen is available to the freezer when called by the controller.
5. Monitor the indicator lights for “Low Carbon Dioxide” and “Low Battery”. When the “Low Carbon Dioxide” indicator is on, the pressure in the carbon dioxide tank is lower than 35 bar. Replace the tank to ensure proper cooling. When the “Low Battery” indicator is on, the battery needs to be charged. Connect the AC power to a power outlet to charge the system.
6. Refer to the Operation Manual for maintenance instructions and troubleshooting tips.

Operation Manual

• Read the Operation Manual carefully before using your appliance.
• Keep the Operation Manual ina safe place.
• Appearance, color and layout of the door may vary.
• Translation of the original instruction

The actual design and color of the unit you received may vary as a result of continuous improvements.

Product introduction

Free standing CO2 and LN2 backup refrigeration systems are designed to provide emergency refrigeration for ultra low temperature freezers. The backup system includes a control system and a feeding system. The control system modulates a liquid feeding solenoid valve to provide the freezer with a certain amount of liquid CO2 or liquid LN2 to cycle the freezer’s temperature within a range. The backup system is equipped with a rechargeable battery which powers the system to sustain the refrigeration.

Description of components

Due to continuous improvement, the product that you receive may not resemble what is depicted in the picture. We apologize for this inconvenience.

Precautions

Please read the manual carefully. Follow the instructions provided in the manual to install and operate the backup system. Haier cannot be held responsible for any damage as a result of improper action with the backup system.

Precautions for Installation Location

Do not install a backup system in an enclosed or narrow space. Although CO2 and LN2 are non-toxic, evaporation of large amounts of such liquids displaces oxygen gas which can cause deadly suffocation. Please be sure that the installation area is sufficiently ventilated.

Precautions during Operations

1. lf a CO2 or LN2 cylinder falls to the floor, its control valve can be knocked off causing tremendous danger to the surroundings. During transit, be sure to fasten the cylinder properly to prevent accidental falling. After the cylinder is connected to the backup system, make sure that the cylinder is fastened securely to a fixture.
2. Be sure to use cylinders with siphon tube ..
3. Expanded CO2 liquid and LN2 liquid are extremely cold. They can cause skin damage if exposed. When these cryogen-containing cylinders and tubing systems are moved, operators must wear safety glasses and gloves.
4. When the main valve on the cylinder is being turned off, be sure to turn on the solenoid valve to let the liquid out of the valve. A sudden stop of liquid movement can cause a pressure surge if the solenoid valve is closed which could trip the safety relief valve or cause damage.
5. For the safety of operators and trouble-free operations, the apparatus must be grounded properly. Poor grounding connection can cause injury to operators or damage to property. Do not install the unit to a circuit that is already overloaded.
6. Do not modify or change system components. Do not use any spare parts that are not approved by the manufacturer. Unapproved parts can cause the system to malfunction which, in turn, can cause severe injury to operators. cannot assume any liability resulting from this. Users must confirm the backup system is suitable for the application.
7. The plug on the power supply cord can be used as disconnect device which shall be easily accessible.

Transportation and Installation

Transportation

The system must be in an upright position during transportation. Handle it with care to avoid damage.

Before installation

1. Please strictly follow the instructions on the product label to install the unit. The design voltage is Wiring must be done by qualified technical personnel. The product must be grounded properly.
2. Never connect the ground wire and neutral wire together. Otherwise, the equipment may be electrified causing severe injury and harm to operators.
3. Do not drill a hole in the liner of ULT freezer. Refrigeration tubing behind the liner can be damaged and refrigerant leaks could occur if punctured. The ULT freezer would not be repairable if this occurs. Pressure Requirement and Safety

Protection

1. The operating pressure for the liquid CO2 backup system is 900 ~ 1000 psig. If the pressure exceeds 1300 psig, a safety valve on the liquid feed line is activated to relieve the pressure. Please be aware that the relief valve should be installed by qualified technical personnel. Haier does not provide the safety valve for the backup system.
2. The recommended operating pressure for the LN2 system is 35 psig. When the pressure in the feed line exceeds 50 psig, a safety valve on the liquid feed line is activated to relieve the pressure. Please be aware that the customers are responsible for hiring a qualified technical personnel to install the relief valve. Haier does not provide the safety valve for the backup system.

Installation

1. Place the backup system on top of the ULT freezer or next to it. The LN2 dewar or CO2 cylinder should be placed behind the backup system. Fasten the cylinders securely to a fixture.
2. lnstall the door switch in the location as illustrated in Fig 2. Connect the door switch with a harness to the connector in the back of the backup system.
3. Sensor installation from backup system. Pick up the sensor from the back of the backup system and insert this sensor into the freezer through the access port located at the back top of the freezer. Locate the probe inside the freezer and tie the sensor from backup system together with the probe in close contact. After this is done, seal up the access port with black spongy material provided with the backup system.
4. Follow Figures 3 and 4 to install the liquid feed line and distribution system.

Installation Procedure

It is recommended that this installation is carried out by a qualified technician.

1. Install the liquid supply line onto the inlet port following the instruction label Install the output capillary tube and the harness for the door switch switch on the backup control box.
2. Place the backup system control box on top of the freezer. Remove the cap for the port hole on the back of the freezer unit.
3. Remove the two inner shelves inside the freezer. Run the capillary tube and temperature sensor across the port hole tunnel into the freezer.
4. Use aluminum clip provided to fasten the capillary tube roughly 150 mm from the tip of the injector. Use a self tapping screw 3.5 to fasten the clip to a prepunched hole locatde in the upper left of the unit. The injector capillary tube is located near the inerior wall, pointing downowards
5. Remove the fasteners for the sensor bracket. Use tie wraps to secure the backup control sensor and the freezer sensor together. Install the sensor bracket in place.
6. Use the insulation tube on the outlet line to seal both sides of the port holes to prevent leak of cold air. Install the shelves back in place.
7. Open the door switch terminal cover, which is located on the side of the compressor compartment cover. Connect both door switch terminals with each other.
8. Install the liquid supply line to the liquid feed line.
9. Plug in the power cord of the backup system to a power outlet. Turn on the main power switch and battery charge switch. The backup unit will keep the battery charged. Please note the backup system can operate independently for up to 12 hours.

Product Features

Master power switch
The main power switch must be turned on for the system to operate properly.

Temperature display and indicator light
The display screen shows the actual temperature in the storage cabinet; When the snow flake light is lit on the display, the feed solenoid valve is activated and the injection is in process. When the “ ” light is lit on the display, the man power switch is in off mode. ERR on the display indicates a sensor failure.

System battery switch
The system‘s battery switch must be turned on. During a power outage, the battery can then supply the power to run the backup system.

Standby test key
The test key is to allow a temporary activation of the solenoid valve. This is to ensure the flow of cryogen is available to the freezer when called by the controller.

Indicator light for ‘Low Carbon Dioxide’
When the indicator is turned on, the pressure in the carbon dioxide tank is lower than 35 bar. The tank must be replaced to ensure a proper cooling is available from the backup system.

Indicator light for ‘Low Battery’
When the indicator is turned on, the battery power is low and it needs to be charged. Connect the AC power to a power outlet to charge the system.

Indicator light for ‘Battery Charging’
When the indicator light is on, it indicates the battery is being charged;

Temperature adjustment

1. Initial status of power on
   When installation of a backup system is completed, plug in the power cord to a power supply. Turn on the main power switch and the battery charge switch. The backup system is in the standby state. All control parameters are the same as from the last power down. The display shows the current freezer temperature. The default factory setting for the temperature control is -70 .

2. Adjustment for temperature settings and parameters Three buttons, set, up arrow and down arrow, are used to make an adjustment of the temperature setting and parameters.
   In normal mode:
   Press and hold Set for 1 second and more. The flashing display will show the set temperature value. Press Up or Down arrow to adjust the set point temperature. Press Set again to save the change. The temperature range is -40 ℃ to -99 ℃.
   Press and hold Set button for more than 3 seconds to access the parameter menu. Press Set button again, control parameter Rd appears. Use Up or Down arrow to adjust the value from 1 to 10℃. Press and hold the Set button for 3 seconds to save the new parameter. The Rd parameter represents the temperature differential that the controller operates the injection solenoid valve. When the actual freezer temperature warms up backup temperature setting plus the differential, the controller will activate the injection solenoid valve. Coolant will be injected to the freezer, attempting to bring the temperature down. When the actual temperature reaches the set point in the backup system, the injection will stop. The cycle will repeat until the freezer temperature becomes colder than the set point in the backup system.

3. If a backup system is not used and disconnected off a freezer, make sure to turn off the main switch and the battery charge switch. Otherwise, the drained battery may not be chargeable again.

Unit Start-up and Tuning

1. Power up the ULT freezer. Let it run to the set freezer temperature.
2. Turn on the main power switch and the battery charge switch on the backup system.
3. Start the test procedure. Set the backup system’s set point temperature 10 C colder than the actual freezer temperature. The backup system will start injecting coolant into the freezer. Open the freezer door, the injection should stop. Close the door, the injection will continue as long as the backup system’s set temperature is not satisfied. The door switch directly controls the action of injection solenoid valve for safety reason. A Preventive Maintenance procedure should always include checking the contact integrity and the function of the door switch.
4. When the freezer is at stable temperature, set the backup system’s set point temperature 10℃ warmer than the freezer temperature to avoid unnecessary coolant injection. A user should decide the set point value based on the critical nature of the stored products. For a CO2 backup system, the system will inject continuously if the set point is lower than -75℃.
5. If the freezer is turned off, unplug the door switch harness from the back of the backup system. This will stop any unnecessary coolant injection while the battery is charged.
6. Keep the backup system connected to a power supply. If the battery runs the system for a long period of time, the battery may not be rechargeable.
7. The consumption rate of LCO2 and LN2 depends on the size of the freezer and product load. The average consumption rate is between 2 and 4 kg/hr.

Maintenance

A backup system should be cleaned regularly. For safety, disconnect its power before cleaning. Use a soft cloth and mild detergent solution for cleaning if necessary. Use a dry cloth to dry it off after cleaning. Never use a strong solution such as organic chemicals, boiling water, detergent, acid or a hardwire brush to clean the equipment. Do not use a water hose to flush the system. If the system is out of service for a while and it needs to be cleaned, follow the instruction above. The equipment should be inspected by qualified personnel on a regular basis. Should there be any issues, consult with the factory or your representative.

Technical Specification

Package

Meaning of crossed out wheeled dustbin:
Do not dispose of electrical appliances as unsorted municipal waste, use separate collection facilities. Contact your local government for information regarding the collection systems available. If electrical appliances are disposed of in landfills or dumps, hazardous substances can leak into the groundwater and get into the food chain, damaging your health and well-being. When replacing old appliances with new ones, the retailer is legally obligated to take back your old appliance for disposals at least free of charge.

Manufacturer: Qingdao Haier Biomedical Co.,Ltd.
Address: Haier Industrial Park,
Economic Technology Development
Zone,
Qingdao P.R. China
Web:www.haiermedical.com
Revision date :9/2018
Version: 1st,2018
Dedicated code: 0270501125 V13026

References

• Haier Biomedical, the complete cold chain manufacturer covering the full range of -196°C to +8°C.

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