VALUE VRDDF Recovery Unit for Flammable Refrigerants User Manual

VRDDF Recovery Unit for Flammable Refrigerants
User Manual

CERTIFICATION

IEC 60079-0: 2018
IEC 60079-7: 2015+A1:2018
60079-11: 2012
ISO 80079-36: 2016
ISO 80079-37: 2016

2813 3G EX EC ic NC h IIA T4 Gc

**| Denotes that this product complies with ATEX directives and certificate No. is CSANe 22ATEX1032X
---|---
2813| Notified body number(CSA Group Netherlands B.V.)
**| Specific marking for explosion protection
**| Surface industry
3| Zone 2 — abnormal hazard
G| Gas
Ex| Denotes explosion protection
ec| Non-sparking
ic| Intrinsic safety
NC| Sealed type relay
h| Constructional safety
IIA| Typical gas – R290, R600a
T4| 135°C
Gc**| EPL – Equipment Protection Level

WEEE (Do not dispose of through typical waste streams)
Correct disposal of this product:
Correct disposal of this product: This marking indicates that this product should not be disposed of with other household wastes. To prevent possible harm to the environment or human health from uncontrolled waste disposal, recycle it responsibly to promote the sustainable reuse of material resources. To return your used device, please use the return and collection systems or contact the retailer where the product was purchased. They can take this product for environmentally safe recycling.

GENERAL SAFETY

Use information

• In order to prolong the Life cycle of the recovery unit, please read the manual carefully before using it to fully understand the safety, specifications as well as operating procedure of the recovery unit.
• Please check the product received is the same as you ordered. Please check the product if there is any damage during transportation. Contact the local distributor if the above problem is found.
• Please read the manual carefully and use the unit according to the product operating procedures.

Safety indication
Warning
This mark indicates procedures that must be strictly observed to prevent hazards to people.
Notice
This mark indicates procedures must be strictly observed to prevent damage or destruction of the unit.
Matters needing attention
Warning
For recovering only HVAC/A refrigerants from sealed HVAC/R systems. Warranty VOIDED I used for any other purposes.
Only a qualified technician should operate this recovery unit.
Before starting the equipment, make sure that it is well grounded.
If using an electrical extension cord, the cord must be in good condition and properly connected and grounded.
Only a qualified electrician can do the wire connection according to the technical standard and circuit diagram.
The power must be cut off and no display in LCD before inspecting or repairing.
If the original power supply cord is damaged, an OEM replacement may be ordered through your VALUE distributor.
Please check the capacity of your power supply, ammeter, electrical wires, and circuit before use.
Only authorized refillable refrigerant tanks can be used. The setting of the pressure limiting device shall not be lower than 45 bar(653psi). Do not overfill the recovery tank, maximum at 80% capacity to make sure that there is enough space for liquid expansion. Overfilling of the tank may cause a violent explosion.
Always wear safety goggles and protective gloves while working with refrigerants to protect your skin and eye from hurting by refrigerant gases or liquid.
Do not use this equipment near flammable liquid or gasoline.
A digital scale ls needed to prevent overfilling.
Be sure that the place where you are working is thoroughly ventilated.
Before connecting, be sure to turn on the recovery unit to check:

1. If the fan is working properly (if there’s air blowing out from the condenser side).
2. Connect the check valve to the outlet port and close the check valve. Keep the inlet port open to the atmosphere. Tum the knob to the “FAST” position and start the machine. The pressure on the outlet side should rise to S60Psi (38.6bar) within 6Ssecs. After that, the high-pressure switch protection switch is on, and the machine will automatically shut down.

Notice
Be sure the unit is working under the right power supply.
When using an extension cord it should be a minimum of 14 AWG and no longer than 25 feet, otherwise, it may cause the voltage drop and damage the compressor.
The input pressure of the unit should not exceed 26bar(377.Opsi) .
The unit needs to be laid horizontally, otherwise, it will lead to unexpected vibration, noise, or even abrasion.
Do not expose the equipment to sun or rain.
The ventilation opening of the unit must not be blocked.
If the overload protector pops, reposition It after 5 minutes.
When doing the self-purging operation, the knob must be turned slowly to “PURGE” to ensure the inlet pressure is less than 5 bar(72.5 psi).
If a fluid hammer happens in the recovery, please tug the knob slowly to the “SLOW * position and do not let the reading pressure drop to zero.
When you select a fast model to start work, please monitor output pressure, if the output pressure Increases fast to 27bar(391.6 psi), please turn to slow mode slowly and monitor the outlet pressure not exceeding 35bar(507.6 psi).
The equipment is intended for serving air-conditioning and refrigeration systems containing less than 200 Ibs of high-pressure refrigerant.
The tank and hose used must comply with local regulations.

ADDITIONAL SAFETY INSTRUCTION

Additional Safety Instructions for refrigeration systems containing Flammable refrigerants.
Except for existing occupational hazard procedures or other regulations that may be required by local, state or federal agencies, the following are additional safety recommendations when servicing refrigeration equipment that contains Class A2ZL, A2, or A3 refrigerants.
The area of service should be marked as a Temporary Hazardous Zone. This will be an area with a radius of 3m centered on refrigeration equipment being serviced and should have no smoking and other hazardous signs posted. The local supervisor should be notified of the zone’s existence.

Refrigeration equipment being serviced
was Division (zone) 2

• Ensure the refrigeration equipment’s power has been discontinued during maintenance work.
• When connecting service equipment (such as vacuum pumps, scales, and recovery units) to a power source, the connection must be made outside the Temporary Hazardous Zone.
•  The factory-equipped power cord of VRDDF és 3.2m, which can make sure the connection is made in an area free of ignitable concentrations. Do not change the power cord at will.

OPERATION MANUAL

1. Do not mix different refrigerants together in one tank, otherwise, they could not be separated or used.
2. Before recovering the refrigerant, the tank should achieve a vacuum level: of -29.6inHg, for purging non-condensable gases. Each tank was full of nitrogen when it was manufactured in the factory, thus the nitrogen should be evacuated before first use.
3. The knob should be in the “Close” Position before operation. All the valves must be closed, and the input and output fittings should be covered with protective caps hen the unit is not in operation. The air/ moisture is harmful to the recovery result and will shorten the life span of the unit.
4. A fitter drier should always be used and should be replaced regularly. And each type of refrigerant must have its own filter. For the sake of ensuring the normal operation of the uni, please use a high-quality filter drier specified by our company. A high-quality fitter drier will help protect the machine.
5. Special caution is needed when recovering from the system, and two dry filters are needed.
6. The unit has an Internal High-Pressure protector. If the pressure inside the system is above rated shut-off pressure (see specification) , the compressor will automatically shut off and the HP cutoff shows. To restart the compressor, please lower the internal pressure (Output gauge indicates lower than 35 bar/507.6 PSI), after the HP cutoff blinks, then Press the “START” button to restart the compressor.  hen high-pressure protection initiates, please determine the cause and deal with it before restarting the unit. “1 The input valve of the refrigerant tank is closed— opening the valve will help solve the problem. (2! The connecting hose between the recovery unit and refrigerant tank is plugged —close all the valves and replace the connecting hose. ‘3 The temperature of the refrigerant tank is too high, causing high pressure— to cool the tank down.

SPECIFICATION

VRDDF

Refrigerants| Category Ill: R12, R134a, R401C, R500, R1234YF, R600a Category IV: R22, R401A, R401B, R402B, R407C, R407D, R408A, R409A, R411A, R411B, R412A, R502, R509, R290 Category V: R32, R402A, R404A, R407A, R407B, R410A, R507
 Power|  220V-240V AC, 50/60Hz
Motor| Brushless Motor, 750W
Motor Speed| 3000 RPM
 Maximal Current Draw| 6.5A
Compressor| Oil-less, Air-cooled, Piston
 High-Pressure Protector| 38.5bar/3850kpa(558psi)
Operating   Temperature| 0-40°C
 Dimensions| 370x250x297mm
Net Weight| 11.5kg

Note: R-702, R-E170, R-1150, R-429A, R-435A, R510A aren’t compatible
PERFORMANCE DATA

VRDDF UL Verified Test Results

Refrigerant.| R22| R134a|  R407C| R410A
Push/Pull Recovery (kg/min)|  7.73| 5.81| 7.75| 8.35
 Liquid Recovery (kg/min)| 5.04| 3.56| 5.56| 6.55
Vapor Recovery (kg/min)| 0.29|  0.26| 0.28| 0.34
Final Recovery Vacuum (kPa)| 50.8| 50.8| 50.8| 50.8
Residual Trapped Refrigerant (kg)| 0.007| 0.006| 0.006| 0.005
High Temp (104°F) (kg/min)| 0.34| /| /| /

INTRODUCTION OF OPERATION PANEL

• Start/Stop Starts and Stops recovery unit.

• LP Switch: Hold for 3 seconds to switch between LP1, LP2, and Lp3.

• Units/Zero: Press to change units to InHg, Kpa, Psi, Kg/, Bar, Mpa. Hold for 3 seconds to zero out readings.

• Cancel Alarm: Hold for 3 seconds to mute the recovery unit.

• LP1: (Auto shutoff with manual restart)
  it the inlet pressure is lower than -20inHg for 20 seconds, the unit will shut down. -LP Cutoff will be displayed. When LP a 0 inHg you must press START to restart the recovery unit

• LP2: (Auto shutoff with automatic restart)
  if the inlet pressure is lower than -20inHg for 20 seconds, the unit will shut down. “LP Cutoff is displayed. When LP a 0 inHg the unit will restart automatically.

• LP3: (Continuous Run)
  The recovery unit will run continuously, no matter what the level of the input pressure is (LP)

• O.F.P Cutoff: Will light up when the recovery cylinder is 80% filled, or if the OFP cable is opened. The machine will stop running.

• LP Cutoff: will light up when the low-pressure switch is activated for more than 20 seconds below -20 InHg.

• HP Cutoff: Will light up when the high-pressure switch is activated above 560 Psi. Restart: It will flash after an error has occurred and settled. Pressing “START” will resume the activity. Fault: Error Codes

• El: The pressure sensor is disconnected

• Fault 2: Input voltage is too low

• Fault 3: High input voltage

• Fault 4: Overcurrent protection

• Fault 7: Temperature protector open

• Fault 8: Motor stalling

Mute: Audible alerts and beeps are turned off.
Fan: This icon rotates while the machine is running. When the machine stops, the icon stops rotating.

Close: Inlet valve is closed
Recover.: The input valve is partially opened
Fast: The input valve is fully opened
Purge: Input closed, and output is opened to allow the unit to remove most of the refrigerant inside the recovery machine

INTRODUCTION TO THE WORKING PRINCIPLE OF PISTON COMPRESSOR

• When the crankshaft of the compressor rotates, the piston reciprocates through the transmission of the connecting rod, and the working volume formed by the inner wall of the cylinder, the cylinder head, and the top surface of the piston will periodically change.
• When the piston starts to move from the cylinder head, the working volume in the cylinder gradually increases, the pressure in the volume decreases, the intake valve opens, and the exhaust valve closes. At the same time, the gas enters the cylinder along the intake pipe until the working volume reaches the maximum.
• When the piston moves in the reverse direction, the working volume in the cylinder decreases, the gas pressure rises, and the intake valve closes. When the pressure in the cylinder reaches and exceeds the exhaust pressure, the exhaust valve opens and the gas is discharged from the cylinder until the piston moves to the limit position. Such reciprocating movement realizes gas extraction.
• The crankshaft of the piston compressor rotates once, the piston reciprocates once, and the process of the air intake, and compression. and exhaust is realized in the cylinder, that is, a working cycle is completed.

PARTS DIAGRAM

WIRING DIAGRAM

OPERATING INSTRUCTION

1)Refrigerant hoses exhaust

Preparation
It’s required to use hoses with ball valves on this recovery machine. Connect the hose correctly and firmly (see diagram above)

1. Check the refrigeration device and make sure the gas valve and liquid valve are closed.

2. Check the refrigerant tank and make sure the gas valve and liquid valve are closed.

3. Open the gas valve and liquid valve of the manifold gauge.

4. Open the ball valves on the recovery machine outlet and valves on the hose connected to the outlet

5. Power on the recovery machine, and the LCD screen will display the inlet and outlet pressures.

6. Turn the knob to “FAST-.
   Start

7. Start the vacuum pump and let it run until the recovery machine’s display (low pressure) shows above -20inHg.

8. Close the ball valve of the vacuum pump hose which is connected to the refrigerant tank.

9. Tum the knob to “Close”.

10. Connect the recovery machine outlet to the refrigerant tank with a hose.

2). Recovery mode

Preparation
Connect the hoses correctly and firmly. (Please refer to the connection diagram) Make sure all valves are dosed.

1. Switch off the power of refrigerant equipment.
2. Open the vapor and liquid valves of refrigerant equipment.
3. Open the vapor valve of the refrigerant tank.
4. Open the ball valves on the hose connected to the recovery machine outlet Start the operation
5. Press the ‘START” button to start the machine.
6. Turn the knob to “Recover”.
7. a. If recovered liquid refrigerant, please open the liquid valve of the manifold gauge. b. If recover the vapor refrigerant, please open the vapor valve of the manifold gauge.
8. Recovery is completed when the machine enters into a vacuum. In Automatic shutoff, this would be at -20inHg
9. When recovery is completed, you can run self-purging right away without powering off.

Notice
If a liquid hammer happens in the recovery, please slowly turn the knob to the “Slow” position, and let the reading of the low-pressure gauge drop until the liquid hammer stops. Do not let the reading drop to zero, otherwise, the inlet port will not pump. If it is difficult to start, turn to “CLOSE” when liquid, turn to PURGE” when vapor, then press “START” to restart the machine, and turn to the required position.
3). Self-purge mode A Notice
Notice
The unit must be purged every time after use; the Liquid refrigerant remaining may expand and damage the components and pollute the environment. Start operation

1. The machine stops automatically after recovery is finished based on the LP cutoff setting.

2. Turn the knob to ‘Close”, and press the “START” button to start the machine.

3. Turn the knob to “Purge” and start self-purging.

4. The self-purging mode will be finished when the machine automatically stops or runs to a certain vacuum level.
   Finish operation

5. Tum the knob to “Close”.

6. After confirming the machine has stopped, unplug the power cord from the charger to the power socket first, then unplug the cord from the charger to the recovery machine to avoid sparks.

7. Close the ball valves at both ends of the outlet hose.

8. Close the vapor valve of the tank.

9. Remove all the hoses and recycle them properly.

4). Liquid push/pull mode A Notice
Notice
An electronic scale is needed to monitor the recovery process to prevent overfilling.
Preparation
Connect the hoses correctly and firmly. (Please refer to the connection diagram) Make sure all valves are closed.

1. Turn the knob to “FAST”.

2. Connect(hose 1) to the vacuum pump.

3. Start the vacuum pump to pump the vacuum.

4. Let the vacuum pump run for 20 secs, close the ball valve or those 1), turn off the vacuum pump, and remove the hose from the vacuum pump.

5. Connect(hose 2 and repeat step 2, 3, 4

6. Connect the hoses to the gas port of the system and the liquid port of the refrigeration tank.
   Start operation

7. Open the vapor valve, the liquid valve of the HVAC system.

8. Open the ball valves on the connecting(hose 1) and hose 4

9. Open the vapor valve and liquid valve of the tank.

10. Press the “START’ button to start the machine, then it starts liquid push/pull mode.
    • If the reading on the scale keeps the same or changes slowly, it means liquid in the HVAC system has been recovered and vapor recovery mode can be underway.

11. Turn the knob slowly to “Purge” and start self-purging mode for the liquid.

12. Turn the knob to “Close”

13. Close the vapor valve and liquid valve of the HVAC system.

14. Close the vapor valve and liquid valve of the tank.

15. Close the ball valves on the hose connecting the recovery machine outlet and the system.

16. Close the ball valves on the hose connecting the refrigerant tank and the system.

17. Reconnect the hoses, and start recovery mode for the vapor. Finish

TROUBLESHOOTING

2. Inner connection is loose.
3. Connect to J6 is damaged.
4. Malfunction of the circuit board.|  1. Replace the cord.
2. Check the connection.
3. Replace the connection.
4. Replace MCB or DCN circuit board. Contact VALUE tech support
The machine does not run after pressing the START|  1. HP Cutoff, or OFP Cutoff works (screen shows.)
2. Fault 2 or Fault3
3. Fault
4 or Fault 8 4. Fault 7
5. Button is damaged.
6. Circuit board is damaged.|  1. Check if the connection between HP or OFP to DCB is good.
2.1 Adjust to correct voltage.
2.2 If the voltage is correct, replace the MCB
3.1 If this happens only when starting the machine: for liquid recovery, turn the knob to “CLOSE”, for gas recovery, turn the knob to ‘PURGE’, press “START” again to start the machine, and turn the knob to “FAST”.
3.2 Only when inlet pressure is too high or fluid hammer happens, turn the knob to ‘SLOW’
3.3 When the error occurs at no load, power off the machine and check if the fan can be manually rotated. If yes, replace the control board. If not, send the machine back to the factory for repair.
4. Check If the connection between TP and MCB is good. If good, contact VALUE tech support. 5/6. Replace the front side plate with a digital manifold gauge.
 The machine stops after running a period of time| 1. Misoperation causes HP Cutoff.
2. Thermal protector is on and shows Fault 7.
3. Refrigerant is 80% in the tank, and O.F.P Cutoff shows.
4. low-pressure protection switch is on.|  1. Refer to section 6 of OPERATION MANUAL on page 3.
2. When Fault 7 and Restart flash, press START.
3. Replace the tank. When 0. F.P cutoff and Restart flash, press START.
4. See refer to self-cleaning operation steps for self-cleaning.
El shows at LF or HP|   Pressure sensor is not connected well or is open circuit.|  Check if the connection between LS or HS to DCB is good. If good, replacepressure sensor.
 Slow recovery rate| 1. The pressure of the refrigerant tank is too high.
2. The valve is not open enough.
3. Piston ring of the compressor is damaged| 1. Cooling the tank help decrease the pressure.
2. Turn the knob towards “FAST’.
3. Contact VALUE tech support.
Not evacuate| 1. Connection hose is loose. 2. Machine leaks.| 1. Tighten the connection hose.
2. Contact VALUE tech support.

Attention
If you have the compressor repaired in any circumstances, please do a leak test before use and make sure there’s no leak.
How to do the leak test:

1. Block the outlet port with a ball valve, keep the inlet in connection with the atmosphere;
2. Turn the knob to the ‘FAST’ and start the machine. When the outlet pressure rises to 30bar, press the ‘STOP”, and then turn the knob to the ‘PURGE’.
3.  Leave it alone for 30 minutes. Check the reading of the low-pressure gauge. If the pressure is higher than 15bar then it passes the test. If it is lower than 13bar, there a leak; if it is between 13bar and 15bar, leave it for another 30 minutes. If the pressure drops 5 3bar, then it passes the test

http://www.worldvalue.cn/lead/en.aspx
VALUE Mechanical & Electrical Products CO., LTD
Add No. 5, 3rd. Street, East Industrial Park, Wenling, Zhejiang, China
Tel:+136-576-86191959
Email: value@guoldvalue.cn
Fax:+86-576-86191957
 www.worldvalue.cn

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