Toptech TT-RE250D User manual

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USER MANUAL
REFRIGERANT RECOVERY UNIT

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TABLE OF CONTENTS
G E N E R A L S A F E T Y G U I D E L I N E S … … … … … … … … … … … … … … 2
SPECIFICATIONS…………………………………………………………4
S TA N D A R D L I Q U I D / VA P O R R E C O V E R Y P R O C E D U R E … … 6
S E L F - P U R C G E P R O C E D U R E … … … … … … … … … … … … … … … … … 8
L I Q U I D P U S H / P U L L P R O C E D U R E … … … … … … … … … … … … … 9
TA N K C O O L I N G P R O C E D U R E ( O P T I O N A L ) … … … … … … … … 1 0
A LT E R N AT I V E C O O L I N G P R O C E D U R E ( O P T I O N A L ) … … 1 1
O I L S E PA R AT I N G P R O C E D U R E … … … … … … … … … … … … … … 1 2
T R O U B L E S H O O T N G … … … … … … … … … … … … … … … … … … … … 1 3
W I R I N G D I A G R A M … … … … … … … … … … … … … … … … … … … 1 4
P A R T S D I A G R A M … … … … … … … … … … … … … … … … … … … … 1 5

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GENERAL SAFETY GUIDELINES
1. Read all safety, operating guidelines and instructions before operating this
recovery machine.
2. Always think before acting, familiarity breeds carelessness, and carelessness can be
harmful to your health, or worse, result in death.
3. Only a qualified technician should operate this Recovery machine.
4. Read all safety information regarding the safe handling of refrigerant and
refrigerant oil, including the Material Safety Data Sheet. MSDS sheets can be
obtained from your refrigerant supplier.
5. Always wear safety goggles and protective gloves when working with refrigerants
to protect your skins and eyes from refrigerant gases and refrigerant liquid. Avoid
getting in touch with causticity liquid or gas.
6. Be sure that any room where you are working is thoroughly ventilated.
7. Use ONLY authorized refillable refrigerant tanks. It requires the use of recovering
tanks with a minimum of 27.6bar working pressure.
8. Do not overfill the storage tank. Tank is full at 80% volume. There should be
enough space for liquid expansion (overfilling the tank may cause an explosion). A
Scale or an 80% Over Fill Pressure Kit must be used to avoid over filling the storage
tank.
9. Do not exceed the working pressure of Recovering Tank cylinder.
10. Do not mix different refrigerants together in one tank, or they could not be
separated or use later.
11. Before recovering the refrigerant, the tank should achieve the vacuum level of
-O.1mpa, which is 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 the first use.
12. When the recovery machine is not used, all the valves should be closed. Because
the air and moisture may harm the recovery result and shorten the service life of
the recovery machine.
13. When using an extension cord, it should be a 14AWG minimum and is what
recommended by local code and no longer than 7.62 meters (25feet), if longer
suffer a voltage drop and damage the compressor.

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GENERAL SAFETY GUIDELINES
14. A dry filter must always be used and should replace frequently. And each type of
refrigerant must have its own filter. For the sake of assuring the normal operation
of the unit, please use the filter specified by our company. High quality dry filters
will bring high quality services.
15. Special care should be taken when recovering from a "burned-out" system. Use
two high acid capacity filters, in series. When you have finished recovering from
the system, flush the recovery machine with a small amount of clean refrigerant
and refrigerant oil to purge off any foreign substances left in the machine.
16. This recover machine has a Pressure Shut off Switch. If the pressure inside the
system should go above 38bars, the system will automatically shut itself off. The
shut off switch must be manually reset.
17. If the tank pressure exceeds 20.7bar, use the TANK COOLING PROCEDURE to
reduce the tank pressure.
18. To maximize recovery rates, use the shortest possible length of 3/8" or larger
hose. A hose no longer than 0.9meter is recommended.
19. When recovering large amounts of liquid, use the LIQUID PUSH/PULL
PROCEDURE.
20. After recovering, make sure there's no refrigerant left in the machine. Read the
SELF-PURGING PROCEDURE carefully. Liquid refrigerant remained may be expanded
and damage the components.
21. If this recovery machine is to be stored or not used for any length of time, we
recommend that it be completely evacuated of any residual refrigerant and purged
with dry nitrogen.
22. To reduce the risk of injury, care should be taken when moving this machine.

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SPECIFICATIONS
MODELS
TT-RE250D
REFRIGERANTS
CAT.III:R-12, R-134A, R-401C, R-406A, R-500
CAT.IV:R-22,R-401A, R-401B,R-402B,R-407C,R-407D,
R-408A,R-409A,R-411A,R-411B,R-412A,R-502,
R-509
CAT.V:R-402A,R-404A,R-407A,R-407B,R-410A,R-507
VOLTAGE
110/230VAC 50/60HZ
COMPRESSOR
1/2HP OIL-LESS
MAX CURRENT
4A@50HZ 8A@60HZ
HP SHUT-OFF
38BAR/550PSI
RECOVERY RATE
CAT.III
CAT.IV
CAT.V
VAPOR
0.23KG/MIN
0.25KG/MIN
0.26KG/MIN
LIQUID
1.57KG/MIN
1.81KG/MIN
1.85KG/MIN
PUSH/PULL
4.64KG/MIN
5.57KG/MIN
6.22KG/MIN
OPERATING TEMP.
0-40℃
CASE
BLOW MOLDED HIGH IMPACT POLYETHYLENE
DIMENSIONS
19.1"LX8.7"WX14.4"H(485MM X220MMX365MM)
NET WEIGHT
14KG/33LBS

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STANDARD LIQUID/VAPOR RECOVERY PROCEDURE
1. Make sure this recovery machine is in good operating condition.
2. Make sure all connections are correct and tight.
3. Open the liquid port of the storage tank.
4. Make sure the MODE valve is set on RECOVERY.
5. Open the output port of the recovery machine.
6. Open the liquid port on your manifold gauge set; opening the liquid port will
remove the liquid from the system first. After the liquid has been removed, open
the manifold vapor port to finish evacuation the system.

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7. Connect the recovery machine to a right outlet. (See the nameplate on the
machine) Switch the power switch to the ON position, you should hear the fan
running, then press the START switch to start the compressor.
8. Slowly open the input port on the machine.
1) If the compressor starts to knock, slowly throttle back the input valve until the
knocking stops.
2) If the input valve was throttled back, it should be fully opened after the liquid
has been removed from the system (the manifold gauge set vapor port should
also be opened at this time).
9. Run until desired vacuum is achieved.
1) Close the manifold gauge sets vapor and liquid ports.
2) Turn off the machine.
3) Close the unit's input port and proceed with the SELF –PURGE PROCEDURE on
the next page.
Note:
If the recovery machine fails to start, rotate the INPUT valve and the MODE
valve to purge position. Then rotate the MODE valve back to recovery
position, and open the INPUT valve.
Caution:
Always purge the unit after each use. Failure to purge the remaining
refrigerant from the unit could result in the acidic degradation of internal
components, ultimately causing premature failure.

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SELF-PURGING PROCEDURE
Procedure for purging remaining refrigerant from this machine.
1. Close the ports of the system being serviced that are connected to the input/out
of the machine.
2. Turn off the recovery machine.
3. Turn the Input valve to the PURGE position.
4. Turn the MODE valve to the PURGE position.
5. Restart the machine.
6. Run until desired vacuum is achieved.
7. Close the ports on the recovery tank and the machine.
8. Turn the machine off.
9. Return the MODE valve to the RECOVERY position.
10. Disconnect and store all hoses and dry filter.

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LIQUID PUSH/PULL PROCEDURE
Push/pull procedure only works with large systems where the liquid refrigerant is no
less than 6.8kg (151bs.).
1. Put MODE valve knob on RECOVERY.
2. Open OUTPUT valve.
3. Open INPUT valve.
4. When the scale stops rising close all ports.
5. Switch off the machine.
Caution:
When using the “Push/pull" method, a scale must be used to avoid over filling the
storage tank, once the siphon is started, it can continue and overfill the storage
tank even if the tank is equipped with a float level sensor. The siphon can continue
even when the machine is turned off. You must manually close the valves on the
tank and the unit to prevent overfilling of the recovery tank.

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LIQUID PUSH/PULL PROCEDURE
In order for this procedure, you must have a minimum of 5 lbs. (2.3kg) of liquid
refrigerant in the storage tank.
1. Connect the hoses as shown.
2. Turn the MODE valve to the Recovery position.
3. Open the Vapor and Liquid valve of the storage tank.
4. Power on, and start the compressor.
5. Open the INPUT valve and OUTPUT valve of the machine.
6. Throttle the OUTPUT valve of the machine so that the output pressure is 100psi
greater than the input pressure, but never more than 300psi.
7. Run until tank is cold.

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TANK COOLING PROCEDURE (OPTIONAL)
Set up your equipment as shown, it is possible to cool the storage tank during the
recovery procedure if necessary.
1. Open the vapor valve of the storage tank (it is closed while recovering).
2. Close the two valves of the manifold gauge set.
3. Follow the sixth and seventh items of the tank Cooling Procedure.

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TROUBLESHOOTING
PROBLEM
CAUSE
ACTION
Fan does not run when Power
Switch is in ON position
Power supply cord not
attached voltage is not right
The circuit breaker has cut off
Attach the power supply cord.
Check the power supply at job site.
Press the button to reset
Fan runs but compressor does
not start
The recovery machine is in
high pressure shut off
Output pressure is too high
Failure in motor, or in other
electrical components.
Reduce pressure and then press the
button of the High Pressure Switch.
Rotate INPUT valve and MODE valve
to PURGE, then rotate INPUT valve
back to OPEN, and MODE valve to
RECOVER
Factory service required
Compressor starts but cuts off
within a few minutes
MODE valve is in PURGE
position
Output valve is not open and
high pressure activates
Recovery tank valve is not
open
Rotate MODE valve to RECOVER
Rotate OUTPUT valve to OPEN
Open recovery tank valve
Recovery process too slow
Head pressure too high
Compressor seals are worn
Reduce tank temperature with TANK
COOLING PROCEDURE
Factory service required
Recovery machine does
not pull out a vacuum
Connecting hoses are loose
Leakage in unit
Tighten the connecting hoses
Factory service required

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WIRING DIAGRAM
WIRING DIAGRAM-STANDARD

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WIRING DIAGRAM -LOW PRESSURE SHUT OFF FUNCTION
PARTS DIAGRAM FOR TT-RE250D SERIES
1. PLASTIC CASE 9.POWER SWITCH 17.TRAP/TUB
2. CONTROL VALVE 10.DRYER/FILTER 18.BASE
3. FRONT PANEL 11.HOSE 19.RUBBER FOOT
4. INPUT GAUGE 12.TRAP/TUB 20.CONDENSER
5. OUTPUT 13.TRAP/TUB 21.FAN
6. KNOB 14.COMPRESSOR 22.BACK PANEL
7. CIRCUIT BREAKER 15.MOTOR 23.SOCKET
8. HP SWITCH 16.TRAP/TUB 24.POWER CORD

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