freddox FD-520D Digital Display Refrigerant Recovery Machine Instruction Manual

Use only the tank/cylinder passed the refillable safety certificate, the minimum pressure is 45 bar.
Don’t recover excess refrigerant gas in tank/cylinder, less than 80% of max capacity. retain space to prevent pressure increase and cause explosion.

Wear safety goggles and protective gloves in operation. avoid refrigerant gas on the skin and eyes, and damage your health. ( wash with water immediately and seek medical treatment if skin and eyes touch it. )
The device can’t be used in a place with Liquid overflow or a combustible liquid container.

The tank/cylinder must adopt a charging scale monitor when recovering refrigerant gas. avoid the excess charge.
The place should be well-ventilated when operating the device.

IMPORTANT TIPS

Please read and understand the full content in the instructions, and avoid damaging yourself or your equipment.

Please check carefully the package box is in good condition and the accessories are complete.
Include Recovery unit, 1 pcs filter, 2 pcs Piston spare, and 2 pcs spare filters. operation manual, 1 year warranty. If inconsistent. please contact the local distributor.

ATTENTION

The product must be used by a qualified expert or person who is familiar with air-conditioner and refrigeration systems.

Ensure reliable and effective grounding when starting the device.
The electric cable must be reliable and effectively connected when used.

Only people with electrician certificates can correctly connect power based on Power Equipment technical Standards and wiring rules.
Cut off the power supplier and LCD screen with d play before inspecting and maintaining the device.

If the power line is damaged, please choose the grounding line or buy from our company for replacement.
Consider the current capacity of the power supply. watt-hour meter, wire, and socket before setting up an electric cicircuitThe device is not suitable for A3 refrigerant gas.B2, B3 series toxic refrigerant.

Temperature range (0-50’t).
Make sure the fan mouth is free of debris.

Explosion and fire risk: Don’t use sewer attachments or poorly ventilated enclosed areas.near gasoline, acetylene, or other flammable gas and flames or sparks. Don’t pump hydrocarbons.

OPERATION ATTENTION

The power supply must be consistent with product identification.

Electric cable requirement: 14AGW(Line diameter 1.63mm) or length not exceeding 50 feet (15m). 12AGW(Line diameter 2.05mm) or length not exceeding 1000feet (30m). Otherwise, the voltage may drop and damage the compressor.
Place the equipment horizontally while working. If put tilted. it may cause compressor vibration. increase the noise, and even wear of parts.

Do not expose equipment to sunlight or rain.
Place the equipment in an open area and the vent can’t be blocked.

Shut off by suitable charging hose with ball valve.
Monitor refrigerant gas weight by charging scale.

To avoid cylinder explosion. shut off the cylinder when refrigerant gas capacity reaches 80%.
Recovery of refrigerant gas by the certificated cylinder.

Recommended accessories.
To protect the device. please use a filter of the inlet port and regular cleaning. Avoid the contaminated refrigerants entering.
Monitor pressure and temperature.
The equipment hasn’t residual refrigerant gas after using self-clean ST-520D, avoid different refrigerant gas mix in the same recycled cylinder.

APPLICATION SKILLS

Understand the refrigerant system and match your recycled cylinder.

Charging hose: A short hose is better(3/B charging hose, 1/4 charging hose), remove the valve core. The Shut-off valve is a vulnerable part. replace it after vulnerable.
Recovery will be more convenient and faster with manifold gauges.
Use the valve core wrench to remove the valve core from the valve.
The push-pull mode can be used when recovering massive refrigerant gas.
Recycled cylinder should exhaust to 29.6″Hg(-75cmHg) before using.
You should know how much refrigerant gas need recovered before starting.
Ensure the recycled cylinder has enough space, recovery gas can’t exceed 80% of cylinder capacity. Monitor and prepare another cylinder.
The charging hose doesn’t have gas residue, and decreases cylinder temperature and pressure by water when the cylinder is overheated.
If the cylinder pressure is higher than expected, empty the recycled cylinder and move the compressed refrigerant gas to another cylinder. (page 10)
Try to recover more liquid refrigerants before gaseous refrigerants recovery.
The colder the cylinder, the faster the recovery.
The heat gun can heat the refrigerant pipe. make refrigerant gas heat.

Both gaseous and liquid tubes recover at the same time. faster gas recovery.
Adjust the recycling position to the dotted line when the recovery speed is too fast causing the liquid gas condensation to block the piston.

PRODUCT DESCRIPTION

ST-520D is an intelligent recovery unit with a brushless motor. digital pressure gauge and digital Integration module.Recovery speed fast, motor power strong, sparkless and safe, small size and light weight reliable, convenient carry. Recovery Ill (134A), IV (R407C), V (R32, R41 OA) series refrigerants.
Thank you very much for your purchase of the O,_ premium refrigeration tool series.

PRODUCT CHARACTERISTICS

HD LCD screen;
Brushless motor(High power 1 HP);
One button operation;

Small size.weight light(10kg),convenient carry;
Sparkless design, used for refrigerant gas R32, R600, R134A, R410A, etc.

TECHNICAL PARAMETER

FD-520D
Suitable refrigerant gas	Ill series, R12,R134a,R401C,R406A,R500, 1234YF IVseries, R22,R401A/B, R402B,R407C/D,R408A, R409A,R411A/B,R412A, R502, R509 Vseries, R402A,R404A,R407A/B,R410A,R507,R32
Cylinder quantity	2 cylinder
Power supply Motor	220V-240V, 50/60Hz 750W(1HP)
Speed of revolution Electric current	2500 RPM 220V:6A
Compressor	No oil lubricate, Forced air cooling, Piston type
High-pressure protection	38.5bar / 3850kPa(558psi)
operating temperature	0’t – 40’t / 32 – 104″F
Dimensions	375 x 250 x 320 mm
Net weight	10 kg

Note: The gas pumping rate is proportional to the inlet pressure.

RECOVERY UNIT OUTSIDE DRAWING

STRUCTURAL DECOMPOSITION DIAGRAM

	Accessories name
1	Control knob
2	Knob connecting socket
3	Handle
4	Cover
5	Valve control panel
6	Filter
7	Display screen Key Label
8	Display screen transparent panel
9	Display screen circuit board
10	Front shell
11	Power line
12	Right shell(Condenser)
13	Condenser
14	Cylinder

S/N	Accessories name
15	M6 screw tightener
16	Piston
17	Box set
18	Coupling aluminum sleeve
19	Plum Blossom Mitigation Pad
20	coupling aluminum sleeve
21	Motor set
22	Fan cover
23	Fan
	Left shell(Fan)
25	Motor Control set
26	Baseplate
27	Back shell

DISPLAY AND BUTTON

ST ART /STOP: Start/Stop Motor

ZERO [Long press 3 seconds]: Zero pressure sensor, ports must connect with the atmosphere
CANCEL ALARM: Cancel alarm [Temporarily mute”
MUTE [Long press 3 seconds]: All sounds mute [Settings saved]

UNITS: Choose a pressure/ Vacuum unit

ICON STATUS AND INFORMATION

When the motor is running, the icon turns
Low Pressure Cutoff: Motor shutdown. inlet port vacuum degree low Fault 1: Hardware overcurrent protection

Fault 2: Software overcurrent protection
Fault 3: Overvoltage protection
Fault 4: Undervoltage protection

Fault 5: High-temperature protection
Fault 8: Other protection

PORT LINE CONTROL

CLOSE POSITION

Close inlet and outlet;
Set close position. Close 2 ports during setup;

SELF-CLEAN POSITION

Close inlet and open outlet;
Finish recovery. Set to close inlet port before clearing;

RECOVER POSITION

Open Inlet and outlet port;
Set to open inlet and outlet port during massive recovery process;

RECOVER POSITION (REDUCE EXPENDITURE)

Open part inlet and outlet port;
If the liquid gas condensation blocks the piston.please counterclockwise rotation from the recover position. reduce liquid impact. Decrease the refrigerant flow rate and make the machine run smoothly;
Reduce expenditure as a requirement to achieve smooth operation;

REFRIGERANT FLOW

Refrigerant liquids and gases are pushed into the machine due to the compressor pressure difference, to achieve maximum performance, increase the inlet pressure, and reduce the outlet pressure.
See ApplicationTips

DYNAMIC PRESSURE MEASUREMENT

The ST-520D pressure reading is designed to monitor pressure only. Do not use the ST-520D for dynamic pressure measurements.
If the system pressure is stable, the ST-520D pressure reading will be close to your other gauges. If the system pressure changes, the pressure measurement will be different at different points in the system. For each 1 meter 1/4 “refueling tube, the pressure difference is approximately ± 20 psig.

FUNCTION INSTRUCTION

EMPTY RECOVERY CYLINDERS

When the cylinder pressure is higher than expected, a non-condensing refrigerant will appear at the top of the cylinder. Use additional deeply vacuumed cylinders to extract the non-condensing refrigerant.

Pressurized cylinders must not be disturbed at night.
Vacuum another cylinder.
Connect the closed gas ports of the two cylinders with a manifold.

Measure the gas temperature of the pressurized refrigerant cylinder.
Use a pressure/temperature meter or a digital meter set to find the rated pressure.
Open exhaust port.

Open (empty) the pressurized air port until the pressure is reduced to 5 psi above the rated pressure.
Close valve.
Repeat within 15 minutes. if required, to resettle the refrigerant in the cylinder.

RETRACT DEVICE INTERNAL PIPING EXHAUST READY FOR OPERATION

Connect hoses as shown below, and make sure they are connected correctly and securely.

Open manifold gas and liquid valves.

Close gas and liquid valves for refrigerant recovery cylinders.
Loosen the ball valve hose connecting the recovery cylinder gas valve.
Open the globe valve on the ball valve hose.
START RUNNING

Plug in the power and the LCD screen will display the intake and exhaust pressure.
Turn the knob to the “recovery” position.
Press “START” to START the device and START to clear the air inside the pipe.

Observe the indication value of low pressure. When the indication value drops to -20inhg, the device stops 20 seconds later.
Tum the knob to the “off” bit and press the “START’ button to START the device.
Slowly turn the knob to the “self-cleaning” position and start self-cleaning

Observe the indication value of low pressure. When the indication value drops to -20inhg again, the device stops 20 seconds later.
END OF RUN
Turn the knob to the “close” position, and the end is self-cleaning.
Connect the ball valve hose to the recovered cylinder.

RECOVERY MODE
READY FOR OPERATION

Connect hoses as shown below, and make sure they are connected correctly and securely.
Make sure all valves are closed before connecting.

Power off the refrigeration unit.
Open the gas valve and the liquid valve of the refrigeration unit.
Open the gas valve of the refrigerant recovery cylinder.
START RUNNING

Turn the knob to the “recovery” position.
Press the “START” button to START the device.
When the gas is recovered, open the gas valve of the manifold; When the liquid is recovered, open the liquid valve of the manifold.

The recovery can be ended by running to the desired vacuum or low-voltage protection automatic shutdown state.
After the recovery, the power is not turned off and the self-cleaning mode is directly operated.

ATTENTION

If there is a liquid slugging on the compressor at the “recovery” position, turn the knob slowly counterclockwise. At this point, the indicator value of the low-pressure meter drops until the slugging stops. However.do not reduce the pressure value to 0.

If it is difficult to START again after power off, turn the knob to the “close” position and press the “START’ button to START the device, then turn the knob to the ‘recovery”.
This operation must be monitored by an electronic charging scale.

SELF-CLEAN MODE
ATTENTION

The equipment must be self-cleaning after each use.
The residual liquid refrigerant may expand in the condenser and cause damage to the components, which is harmful to the environment.

START RUNNING

Automatic shutdown after recovery.
Tum the knob to the “close” pos?ion and press the power button to start the device.
Slowly turn the knob to the “self-cleaning” position and start self-cleaning.

Run to the required vacuum, and self-cleaning stop automaticly.
END OF RUN
Turn the knob to “close”.
Close the stop valve of the outlet.

Close the gas valve of the refrigerant recovery cylinder; Close the gas valve of the refrigerant recovery cylinder.

PUSH-PULL MODE
ATTENTION

This operation process must use an electronic charging scale to monitor the amount of recovery

READY FOR OPERATION

Connect hoses to ensure correct and firm connection;(refer to the following connection diagram}.
Ensure that the refrigeration unit, refrigerant recovery equipment (ST-520D}, refrigerant recovery cylinder gas valve, and liquid valve are closed.

START RUNNING

Open the gas valve and the liquid valve of the refrigeration unit.
Open the gas valve and liquid valve of the refrigerant recovery cylinder.

Turn the knob to the “recovery” position.
Press the “START” button to START the device and START the push-pull mode.
When the value displayed by the electronic scale remains unchanged or changes slowly, it means that the liquid inside the refrigeration unit has been recovered and can be recovered as a gas.
Slowly turn the knob to the “self-cleaning” position and recover the liquid in the self-cleaning mode.

Turn the knob to “close”.
Close the gas valve and liquid valve of the refrigeration device.
Close the gas valve and liquid valve of the refrigerant recovery cylinder.

Reconnect the hose and recycle the refrigerating unit in a gaseous manner according to the recovery mode.

END OF RUN

TROUBLESHOOTING

STATUS INFORMATION

Fault:1
The motor current is too high. It may be caused by the following reasons: the equipment temperature is too high, the liquid recovery time is too long, and the cylinder pressure is too high. The motor can recover after cooling. If this failure continues to occur multiple times after recovery, the device may be out of order.
Fault:2
The software detects that the device current is too high, the reason is the same as above (Fault=1}.
Fault=3
Power Grid voltage is too high. The possible cause is that the voltage of the power grid is too high or unstable. Please check whether the power grid voltage exceeds 250V or if there is a large fluctuation.
Fault:4
Power Grid voltage is too low. The possible cause is that the voltage of the grid is too low or unstable. Please check whether the voltage of the grid is lower than 180V or if there is a large fluctuation.
Fault:5
The equipment temperature is too high. The cause is that the current temperature of the equipment is too high, which can be recovered after cooling.
Fault=8
Other unknown faults. If it happens multiple times. it could be a device failure.

OTHER FAULT

Problem	Reason	Solution
Switch on the power. the display does not respond	1. The internal connection is loose 2. Circuit board fault	1. Check the connection wire for firmness 2. Replace the circuit board and send it back to the factory for repair
Press the start button. the machine has no response	The display doesn’t work 1. Power cord or socket failure 2. Circuit board fault Display light on 1. External pressure is too high 2. Damage of motor or other parts	1. Check whether the power cord and socket are in good condition 2. Replace the circuit board and send it to the factory for maintenance. 1. Turn the knob to “position and restart. 2. Replace components and send them to the factory for maintenance.
The machine stops after a period of operation	1. Improper operation causes the high-pressure switch to disconnect, such as the ball. valve switch was not opened and the valve on the recovered cylinder was. 2. The recovery is over and the the device is under low-pressure protection.	1. Please read the instructions carefully and follow them strictly. 2. See the recovery self-cleaning operation steps for self-cleaning operation.
Recovery is too slow	1. The pressure of the recovered cylinder is too high 2. Compressor piston ring damaged	Cooling the recovered cylinder lowers the temperature, causing the pressure to drop 2. Return to factory for repair
The equipment can1 be vacuumed	1. Loose pipe connection 2. Equipment leakage	1. Tighten the pipe connection 2. Return to factory for repair

MAINTENANCE

GENERAL CONDITION

Wipe the outside with a damp cloth and do not use solvents.
To extend the service life of the internal seal, occasionally inhale a teaspoon of mineral oil through the ST -5200 pump.

FILTER CLEANING

When the filter becomes dirty and clogged, it will affect ST -520D recovery efficiency. Clean or replace the filter frequently

Unscrew the (counterclockwise) connection.
Clean or replace the filter.
Manually tighten (clockwise) the connection.

Documents / Resources

freddox FD-520D Digital Display Refrigerant Recovery Machine [pdf] Instruction Manual
FD-520D, FD-520D Digital Display Refrigerant Recovery Machine, Digital Display Refrigerant Recovery Machine, Display Refrigerant Recovery Machine, Refrigerant Recovery Machine, Recovery Machine, Machine

References

User Manual

freddox FD-520D Digital Display Refrigerant Recovery Machine

SAFETY INSTRUCTION