BKool24 PORTABLE ACU OWNER'S MANUAL

Introduction

Heat is a form of energy, and cooling is the process of transferring heat from one object to another. In air conditioning, sensible heat is removed from an indoor space and replaced with cooler air, while the warm air removed is exhausted outside the conditioned space. This process gradually reduces or maintains the inside temperature. Air conditioning is most commonly used to achieve a more comfortable interior environment, typically for humans or animals. However, it is also used to cool rooms filled with heat-producing electronic items, such as computer server rooms. Spot Coolers allow cool air to be directed towards specific objects or people.

An ACU (Air Conditioning Unit) consists of a motor-compressor unit, a refrigerant condenser, two air circulating fans, a refrigerated surface, a means of collecting and disposing of condensed moisture, and a cabinet to house these components.

The evaporator fan draws air through the refrigerated surface, cooling it and removing moisture, which is collected and led away. This cooled air is then returned to the room at a much lower temperature, providing the cooling effect and a lower relative humidity than when the air entered the unit. Continuous circulation of the room air through the ACU evaporator gradually reduces the temperature and relative humidity in the room. The condenser fan draws air over the hot condenser, which keeps the refrigerated surface cold. This air stream should ideally be ducted out of the area being cooled, as it will leave the unit much warmer than the air entering it.

A digital thermostat is included, allowing for precise temperature control. A programmable display lets you set a specific desired temperature level.

The BKool24 is a rugged, reliable cooling unit designed to operate effectively over a broad range of temperatures. A defrost system, controlled by a frostat, guarantees de-icing, thereby optimizing operation at low temperatures.

The unit incorporates a welded steel chassis and is finished in epoxy-coated steel covers for resilience to damage caused by rough handling.

Special Features of the BKool24:

• Defrost system
• Large water container for moisture removal
• Provision for condensate pump drainage
• Exterior epoxy powder-coated finish
• Large durable castors for easy manoeuvrability
• Status Indicators
• Digital Thermostat Controller
• High and low pressure cut-outs

Specifications

This product contains fluorinated greenhouse gases covered by the Kyoto Protocol. The refrigeration system is hermetically sealed.

The Global Warming Potential (GWP) of refrigerants used in products manufactured by Ebac Industrial Products Ltd is as follows:

• R134a – 1300
• R407c – 1610

For type and weight of refrigerant contained in this unit, please refer to the product data label.

Installation

Positioning

Position the ACU unit in the center of the room to be conditioned if at all possible. However, if a specific area needs to be cooled, then place the unit and the cool air outlets over these areas.

NOTE: All air inlets and all air outlets of the ACU unit must have clear space around them and not be obstructed in any way. For correct installation and operation, the unit must have a clearance of 0.5M from all adjacent surfaces and/or structures.

Ducting

The evaporator air can be directed to a desired area with the flexible ducts provided with the ACU unit. The two flexible ducts are provided in a separate box within the unit packaging. These ducts MUST BE FITTED to the ACU unit BEFORE SWITCHING THE UNIT ON. To fit the ducts, remove the 8 off fixings located on the top sloped face around the outlet cut-outs. Place the duct into position on the sloped face and then fix in place with the removed fixings.

Ideally, the condenser air outlet should be ducted out of the room / area being cooled.

Power Supply

Plug the unit into a suitable supply, and the unit is ready for operation.

If the SUPPLY CORD is damaged, it must be replaced by the manufacturer, its service agent, or a similarly qualified person in order to avoid hazard.

Drainage

The ACU unit has a removable water collection container. This must be placed into the unit before it will operate.

Operation

The following procedures should be followed to test the BKool24 for correct operation:

1. After unpacking, examine all external features to confirm damage-free shipment. Report all defects and damage at once. Connect the power cable to a grounded 13 Amp electrical outlet.

2. Setting the Digital Thermostat

   The Digital thermostat is factory preset to give the optimum level of control. Only adjustment of the desired set point is required.

   During normal operation, the display shows the current temperature within the space being conditioned.

   The required temperature level can be set as follows:

   • Press the "S" button once to access the set point.
   • Press the ▲ or ▼ button to change the display to the desired temperature level.
   • Press the "S" button again to save the set point. The control returns to displaying the current temperature.

3. Check cooling process as follows:

   1. Place unit on a level surface.
   2. Start up unit by turning the ON/OFF switch to ON. Note the power light illuminates.
   3. Check the digital thermostat is set to the required temperature setting (below room temperature).
   4. Check that the compressor is running.
   5. Leave the machine running for 15 minutes.
   6. Check cooling ducts are discharging cool air. After a period of time, the digital thermostat temperature display should start to decrease until the set point is reached, at which point the compressor and condenser fan will stop, but the evaporator fan will continue.
   7. If frost is appearing on the evaporator coil, then the unit will periodically go into defrost. When in defrost, the compressor and condenser fan will stop, the evaporator fan will continue, and the defrost light will illuminate. Once defrost is achieved, the unit will return to normal operation.

Drainage and Pressure Stats

Drainage

The ACU unit has a removable water collection container. This must be placed into the unit before it will operate. When the bucket fills, it will automatically turn the unit off before overflowing. This container will need emptying on a regular basis so the ACU unit can provide continuous cooling. Access to the container is gained via the small service door and quick-release catches, located on the side of the unit.

If the bucket is missing or full, as well as the unit not operating, it will illuminate the bucket fault light.

A condensate pump can be fitted to provide continuous drainage. Please contact EIPL or your distributor for further information.

Pressure Stats

The ACU unit is fitted with a low pressure stat and a high pressure stat. These pressure stats are connected to the refrigeration system and are safety devices designed to protect the refrigeration components. If one of the pressure stats is activated, then the pressure fault indicator light will illuminate, and the following should be carried out:

1. Switch unit off and leave for a minimum of 5 minutes.
2. Check the air inlets are not blocked.
3. Ensure that the unit is operating within specified parameters of 18°C – 35°C.
4. Switch unit back on. If it restarts, then the low pressure stat tripped and has re-set.
5. If the unit does not restart, then switch unit off, disconnect from power supply, and manually reset the high pressure switch located within the unit. Restart the unit and check for normal operation.
6. If the unit still does not start or has started and cuts out on pressure switches, then the unit should be turned off and disconnected from the power supply. Then contact either the manufacturer, distributor, or qualified personnel.

[CAUTION]: ONCE THE UNIT HAS BEEN SWITCHED OFF, WAIT AT LEAST FIVE MINUTES BEFORE RESTARTING.

Warnings

• Due to the high pressures within the refrigeration circuit, under no circumstances must direct heat be applied to the evaporator coil in an attempt to remove the build-up of ice.
• No attempt should be made to cut open any part of the refrigeration circuit due to high pressures and gas involved.
• If the unit is switched off at the mains power supply for any reason, the unit must be allowed to stand at rest for at least five minutes before restarting.

If, after carrying out the above procedures, the unit does not appear to function properly, refer to the Troubleshooting section, which follows, or contact either the manufacturer, distributor, or qualified personnel.

Appliance Usage and Safety

This appliance can be used by children from 8 years and above and persons with reduced physical, sensory, or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the application in a safe way and understand the hazards involved.

• Children shall not play with the appliance.
• Cleaning and user maintenance shall not be made by children without supervision.

Supply Cord Safety

If the SUPPLY CORD is damaged, it must be replaced by the manufacturer, its service agent, or similarly qualified person in order to avoid hazard.

Refrigerant Information

This product contains fluorinated greenhouse gases covered by the Kyoto Protocol. The refrigeration system is hermetically sealed.

The Global Warming Potential (GWP) of refrigerants used in products manufactured by Ebac Industrial Products Ltd is as follows:

• R134a – 1300
• R407c – 1610

For type and weight of refrigerant contained in this unit, please refer to the product data label.

Installation Clearance

For correct installation and operation, the unit inlet and outlet must have a clearance of 0.5M from all adjacent surfaces and or structures.

Routine Service

WARNING: ENSURE THAT THE POWER CORD TO THE MACHINE HAS BEEN DISCONNECTED BEFORE CARRYING OUT ROUTINE SERVICE. THE SERVICING AND REPAIR OF THIS UNIT SHOULD ONLY BE CARRIED OUT BY A SUITABLY QUALIFIED PERSON.

To ensure continued full efficiency of the ACU unit, maintenance procedures should be performed as follows:

1. Clean the surface of the evaporator and condenser coils by blowing the dirt out from behind the fins with compressed air. Hold the nozzle of the air hose away from the coil to avoid damaging the fins. Alternatively, vacuum clean the coils.

2. WARNING: DO NOT STEAM CLEAN REFRIGERATION COILS

3. Check that the fans are rotating freely. The fan motor is sealed for life and therefore does not need oiling.
4. To check the refrigerant charge, run the unit for 15 minutes. The evaporator coil should be evenly frost coated across its surface. At temperatures above 25°C, the coil may be covered with droplets of water rather than frost. Partial frosting accompanied by frosting of the thin capillary tubes indicates loss of refrigerant gas or low charge.
5. Check all wiring connections.

IF ANY OF THE PRECEDING PROBLEMS OCCUR, CONTACT THE EBAC SERVICE CENTER PRIOR TO CONTINUED OPERATION OF THE UNIT TO PREVENT PERMANENT DAMAGE.

Repairs

1. Should an electrical component fail, consult the Factory Service Center to obtain the proper replacement part.
2. If refrigerant gas is lost from the machine, it will be necessary to use a Refrigeration technician to correct the fault. Contact the Factory Service Center prior to initiating this action.
3. Any competent refrigeration technician will be able to service the equipment. The following procedure must be used:
   1. The source of the leak must be determined and corrected.
   2. The machine should be thoroughly evacuated before recharging.
   3. The unit must be recharged with refrigerant measured accurately by weight.
   4. For evacuation and recharging of the machine, use the crimped charging stubs located near pressure switches.

   The charging stub should be crimped and rebrazed after servicing. NEVER allow permanent service valves to be fitted to any part of the circuit. Service valves may leak causing further loss of refrigerant gas.

4. The refrigerant compressor fitted to the dehumidifier is a durable unit that should give many years of service. Compressor failure can result from the machine losing its refrigerant gas. The compressor can be replaced by a competent refrigeration technician.
5. Failure of the compressor can be confirmed by the following procedure:
   1. Establish that power is present at the compressor terminals using a voltmeter.
   2. With the power disconnected, check the continuity of the internal winding by using a meter across the compressor terminals. An open circuit indicates that the compressor should be replaced.
   3. Check that the compressor is not grounded by establishing that a circuit does not exist between the compressor terminals and the shell of the compressor.

Troubleshooting

Spare Parts List

Spare parts available online: www.EIPLDIRECT.com