Akawell refrigeration compressor for R134a 12/24V DC
Quiet, Efficient, Reliable, Durable
Refrigeration Compressor
Description
1 Application range
Suitable for the cooling device with a power of 12 or 24V DC power supply. Evaporating Temperature at -35℃～-5℃, especially for using in a mobile applications. The refrigerant is R134a.
2 Features
- Easy start & high reliable
- Low noise, low vibrancy,long service life
- Attached Controller,few attachment, easy to use
- Rotary speed at 2000rpm～3500rpm adjustable
3 Type
Hermetic reciprocating refrigeration compressor
4 Technical Data
Table 1 Specification
| Compressor Model | ACV20DC | |||
| Displacement(cm3) | 2.0 | |||
| Applications | LBP | |||
| Rotation(rpm) | 2000 | 2500 | 3000 | 3500 |
| Capacity(W) | 33 | 39 | 45 | 50.0 |
| Input Power(W) | 30 | 35.5 | 41 | 46.0 |
| Operating Current(A) | 1.25/2.5* | 1.48/3.0* | 1.70/3.4* | 1.92/3.8* |
| C.O.P(W/W) | 1.1 | |||
| Sound Level(dB(A)) | 38 | 40 | ||
| Vibrancy Acceleration(m/s2) | ≤0.65 | |||
| Operating Voltage(V DC) | 10.9V～17V（12V）、22.7V～31.5V（24V） | |||
| Cooling | Static or Fan cooling | |||
| Lubricant | Polyester | |||
| Lube Vol.(ml) | 150±5 | |||
| Weight(kg) | 4.3 | |||
| Weight of Controller(kg) | 0.40 | |||
| Motor Type | BLDCM | |||
| Refrigerant | R134a | |||
| Throttling Device | Capillary | |||
| Power(V DC) | 12/24 | |||
| Test conditions: Evaporating Temp. -23.3℃ Suction. Temp. 32.2℃
Condensing Temp. 54.4 ℃ Sub-cooling Temp. 32.2℃ Ambient Temp. 32.2 ℃ Notes：“*”base on the input power of 12V DC |
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5.1 Wiring
The ACV20DC Compressors are equipped with a brushless direct current motor which is controlled by an attached controller. The wiring shown as following diagram:
Diagram 1 Wiring Diagram
Diagram 2 Sketch of the installation
The components are as following:
- Battery
- Fuse
- Main Switch (optional)
- Filtering magnetic ring
- LED (optional)
- 12VDC Cooling Fan (optional)
- Thermostat
- Resistor for presetting speed (optional)
- Resistor for presetting battery protection voltage (optional)
- Controller connect directly to the battery. It doesn’t destroy the compressor and controller if a wrong connect between poles, but the compressor will not work.
- Fuse must be connected in the + cable to protect controller, and it closes to the power supply. It is recommended to use15A fuse for 12VDC and 7.5A fuse for the 24VDC.
- If a main switch is used,it should be rated to a current of min. 20A.
- To prevent voltage dropping, please avoid extra junction in the power supply system.
- To install filtering magnetic ring asDiagram 2.
- A Light Emitting Diode(LED) connected between “＋” and “D” will indicate the state of the operation. A flash will last 1/4 second, and each error will repeat every 4 seconds. The error type see the Table 5.
- Cooling Fan can be connected between “+” and “F”, only 12VDC fan is admitted, no matter the power supply you’re using.
- A Thermostat connected between “C” and “T” will start or stop the compressors’ running automatically.
- A Resistor can be connected between “C” and “T”, which allows you to adjust the speed of compressor. The relationship between the resistor and the compressor speed is shown at Table 3.
- To ensure sufficient power supply and avoid permanent damage to the battery, a battery protection resistor is connected between “C” and “P”, and different resistor will get the different protection voltage. The details are shown at Diagram 4.
5.2、Compressor Speed Setting：
The compressor’s speed could be adjusted in range 2,000rpm～3,500rpm by adjusting the resistor of presetting speed：
Table 3 Speed Setting:
| Resistor(Ω) | Speed(rpm) |
| 0 | 2,000 |
| 277 | 2,500 |
| 692 | 3,000 |
| 1,523 | 3,500 |
5.3、Battery Protection Setting：
Table 4 Battery Protection Setting:
| Protect Resistor
（KΩ） |
12V cut-out
（V） |
12V cut-in
（V） |
12V Max.
Voltage（V） |
24V cut-out（V） | 24V
cut-in（V） |
24V Max. voltage（V） |
| 0 | 9.6 | 10.9 | 17.0 | 21.3 | 22.7 | 31.5 |
| 1.6 | 9.7 | 11.0 | 17.0 | 21.5 | 22.9 | 31.5 |
| 2.4 | 9.9 | 11.1 | 17.0 | 21.8 | 23.2 | 31.5 |
| 3.6 | 10.0 | 11.3 | 17.0 | 22.0 | 23.4 | 31.5 |
| 4.7 | 10.1 | 11.4 | 17.0 | 22.3 | 23.7 | 31.5 |
| 6.2 | 10.2 | 11.5 | 17.0 | 22.5 | 23.9 | 31.5 |
| 8.2 | 10.4 | 11.7 | 17.0 | 22.8 | 24.2 | 31.5 |
| 11 | 10.5 | 11.8 | 17.0 | 23.0 | 24.5 | 31.5 |
| 14 | 10.6 | 11.9 | 17.0 | 23.3 | 24.7 | 31.5 |
| 18 | 10.8 | 12.0 | 17.0 | 23.6 | 25.0 | 31.5 |
| 24 | 10.9 | 12.2 | 17.0 | 23.8 | 25.2 | 31.5 |
| 33 | 11.0 | 12.3 | 17.0 | 24.1 | 25.5 | 31.5 |
| 47 | 11.1 | 12.4 | 17.0 | 24.3 | 25.7 | 31.5 |
| 82 | 11.3 | 12.5 | 17.0 | 24.6 | 26.0 | 31.5 |
| 220 | 9.6 | 10.9 | 31.5 | |||
Controller calibrator to the applied voltage automatically. When the battery voltage is lower than 17VDC, the controller consider it is working in a 12VDC system. When the voltage is higher than 17 VDC, the controller consider it is working in a 24VDC system. If a 220KΩ resistor is connected between “C” and “T”, the operating voltage range could be extended between 9.6V～31.5V, which means ACV20DC is very suitable for photovoltaic solar power application.
5.4、Error Indication
If the start failed, the controller will attempt restarting every 60s until a successful start is achieved. The following Table shows the Error Type and reason.
Table 5 Error Indications:
| Number of flashes | Error Type |
| 1 | Battery protection cut-out
（Battery voltage is outside the setting range shown in Table 4） |
| 2 | Fan over-current cut-out
（The operating current of cooling fan is more than 1A） |
| 3 | Motor start error
（The rotor is blocked or the system pressure is too high） |
| 4 | Minimum motor speed error
（If the refrigeration system is too heavily loaded, the motor speed is lower than 1,850 rpm） |
| 5 | Thermal cut-out of controller
（If the refrigeration system has been too heavily loaded, or if the ambient temperature is high than 55℃, the controller will run too hot） |
Table 6 Accessories:
| No. | Title | Pieces | Model | Comments |
| 1 | Controller | 1 | 11302(11028) | / |
| 2 | Filtering magnetic ring | 1 | / | Accessory of controller |
| 3 | Screw of controller | 1 | （GB/T823-1988 M4×8） | / |
| 4 | Rubber grommet | 4 | ACV20DC-27 | / |
| 5 | Garter spring A | 1 | ACV20DC-29 | / |
- Please keep perpendicularity, can not be turned upside down and avoid vibration and shocks during transportation.
- Please ensure to store the compressors under dry and well-ventilated condition to avoid the package getting
- It is not available to make more than two layers package of compressors for avoiding any rolling during loading and unloading.
- After consignment,it’s better don’t to store the compressors more than 6 months.
- The compressor is only allowed to be connected to a 12/24VDC system. It is forbidden to connect compressor directly with an AC power supply.
- The back gas tube on refrigeration system must be connected with the suction tube on compressor, not the process tube on compressor. Otherwise the compressor cann’t work in gear.
- Please mount the compressor into the refrigeration system quickly in 10 minutes after uninstall the tubes of the compressor (suggest to uninstall the process tube first).
- The maximum ambient temperature of the compressor operation is 55℃. When continuously operating under the maximum ambient temperature 55℃, the max condensing pressure and the peak pressure should not exceed 1.75MPa and 2.17MPa.
- Balance pressure（55℃）： start the compressor，the pressure in the compressor could not more than 0.49MPa.
- Do not operate the compressor before polyester is charged.
- The refrigerant charge should be less than 200g.
- The interval of compressor operation：Operation is more than 3 minutes, and the stoppage is more than 3 minutes too.
- Special attention：Do not use the compressor as a vacuum pump, and do not start it under vacuum status too.
- The refrigeration system should minimize the content of chlorines and moisture, and must be free of paraffin and silicon.
- In order to make the compressor work properly, the following cable dimensions must be observed.
Table 7 Cable requirements
| Cross-section
(mm2) |
Max. Length between battery and Controller
(m) |
|||||
| 12V DC | 24V DC | |||||
| 2.5 | 2.5 | 5 | ||||
| 4 | 4 | 8 | ||||
| 6 | 6 | 12 | ||||
| 10 | 10 | 20 | ||||
In 36 months after consignment, we’ll recall or repair the compressors which is damaged or could not work properly due to manufacture quality (if the user abides by the manual correctly).
1.ACV20DC compressor dimensions:
2.Mounting the controller:
3.Connection method for refrigeration system
