vre12p operating manual

vre12p operating manual
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VRE12P
TABLE OF CONTENT
GENERAL SAFETY GUIDELINES
SPECIFICATIONS
PARTS DIAGRAM AND PARTS LIST
4
WIRING DIAGRAM 5
STANDARD LIQUID/VAPOR RECOVERY METHOD 6
SELF-PURGING METHOD 8
LIQUID PUSH/PULL METHOD 9
STORAGE TANK COOLING METHOD 10
EVACUATION MODE 12
VACUUM PUMP MAINTENANCE
TROUBLESHOOTING
13
14
FEE rm a ет Tes Sy [E dra Дт mm
BE GENERAL SAFETY GUIDELINES
. Read all safety, operating guidelines and instructions before operating
your VRE12P.
2. Only a qualified technician should operate this Recovery unit!
3. 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.
=
4. Do not expose the equipment in the sun or rain. |
- Be sure that any room where you are working is thoroughly ventilated.
6. Use ONLY authorized refillable refrigerant tanks. It requires the use of
Ln
recovering tanks with a minimum of 27.6bar working pressure.
7. Do not overfill the storage tank. Tank is full at 80% volume. There should
be enough space for liquid expansion——overfilling of the tank may cause
a violent explosion. A scale must be used to avoid over filling the storage
tank.
8. Do not exceed the working pressure of Recovering Tank cylinder.
9. Don't mix different refrigerants together in one tank, or they could not
be separated or used.
10. Before recovering the refrigerant, the tank should achieve the vacuum
level: -0.1mpa, 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.
11. When the unit is not used, all the valves should be closed. Because the
air or the moisture of the air may harm the recovery result and shorten
the service life of the unit.
12. When using an extension cord it should be a 14 AWG minimum and no
longer than 7.6meters, or it may make the voltage drop and damage the
Compressor.
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13. А dry filter must always be used and should replaced 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.
14. Special care should be taken when recovering froma “burned-out”
system. Use two high acid capacity filters, in series. When you have
finished recovering from the system, flush the unit with a small amount
of clean refrigerant and refrigerant oil to purge off any foreign substances
left in the unit.
15. This unit has an Internal Pressure Shut Off Switch. If the pressure inside
the system should go above 38.5bars, the system will automatically shut
itself off. The shut off switch must be manually reset. (Access to the
Shut -Off switch is through the hole located in the lower left front panel.)
16. If the tank pressure exceeds 20.7bar, use the Storage Tank Cooling
Method to reduce the tank pressure.
17. To maximize recovery rates, use the shortest possible length of 3/8”
or larger hose. A hose no longer than 0.9meter is recommended.
18. When recovering large amounts of liquid, use the Liquid Push/Pull
method .
19. After recovering, make sure there's no refrigerant left in the unit. Read
the Self -Purging Method carefully. Liquid refrigerant remained may
be expanded and destroy the components.
20. If the unit 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.
SPECIFICATIONS
Recovery unit
Vacuum unit
Coat. il: R-12,R-1340,R-401 C, R-A 084, R-500,
Refrigerants Cot: B-22.R-401A,R-4018,R-4028,8-407C, R-4070,R- 408A, R-4094, 7-41 1 A,R-4124,R-502,R-509
CotV: R-402A R-204A.R-407TA R-4078.7-410A.R-507,
110-120v 604:
Power
220-2404 50H
Motor 1/24P 1/3HP
14506PM @ 5062
Motor Speed
1750RPM E SON:
4A @ БОНЫ 3.54 7 SOMI
Max Curront
BA @ é0Hz 654.0 607
Compressor Ou-leus, Air coôtéd, Pisbon куй
High Pressure Shut-off Switch | 3856075568 Ne
Cot № Col. N Cot. Y
$ = vapor 0.23 0.25 0.28
E Liquid 1.87 1.81 1.85
Push/Pul 464 8.57 6.22
Où Capacity : : 10.802
Operating Temp 0-40
VRE12 VRET2P
Dimansiona AOL) x3800W] x365/H) mn AGONL) x3000W) x4200H) mm
Not Weight зэка 36Kg
Te A к онаЦЕ
№) PARTS DIAGRAM AND PARTS LIST
1 25
ITEM| DESCRIPTION
1 | INPUT GAUGE
2 |OUTPUT GAUGE
3 | KNOB
4 | PANEL
5 | FITTING
6 | OILFILLING CAP
7 | COVER
8 | HANDLE
9 | FRAME
10 | AXIAL FANI
11 | OIL SEPARATOR
12 | VACUUM PUMP
13 | EXHAUST FITTING
14 | WHEEL
15 | BASE
16 | COMPRESSOR
17 | AXIAL FAN2
18 | CONDENSER
19 | BACK FRAME
20 | EXTENSION HANDLE
21 | CONTROL VALVE
22 | SELECT VALVE
23 | POWER SWITCH
24 | SELECT SWITCH
25 | PRESSURE SWITCH
O
WIRING DIAGRAM
POWER SWITCH
se
E
AXIAL
FAN 1
AXIAL
FAN2
STANDARD LIQUID/VAPOR RECOVERY METHOD
1. Make sure the unit is in good operating condition.
| 2. Make sure all connections are correct and tight .
mA
FRESSURE
SWITCH
M,
COMPRESSOR
VACUUM PUMP
Manifold
gauge set
3. Open the liquid port of the storage tank.
4. Make sure the Recover/Evacuate valve is set on Recover.
5. Make sure the Recover/Purge valve is set on Recover.
6. Open the output port of the unit.
7. 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 evacuating the system.
Recover Recover
и O O
| Ореп Ореп
| 5 5
J Evacuate Purge
o Close ©
=
rge
| ©
8. Connect the unit to a right outlet.(See the nameplate on the unit)
1) Switch the Power switch to the ON position. You should hear the
fan running.
2) Switch the Mode switch to the RECOVER position.
Note: If the unit fails to start, close the Input valve and rotate the Recover/
Purge valve to Purge position, then restart your unit. Then rotate
the Recover/Purge valve to Recover position, and open the Input
valve.
9. Slowly open the input port on the unit.
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 once the
liquid has been removed from the system (the manifold gauge set vapor
port should also be opened at this time).
10. Run until desired vacuum is achieved.
1) Close the manifold gauge sets vapor and liquid ports.
2) Turn off the unit.
3) Close the unit's input port and proceed with the Self -Purge Method on
the next page.
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.
6 SELF-PURGING METHOD
Procedure for purging remaining refrigerant from this unit
1. Close the ports of the system being serviced that are connected to the
input port of the unit.
. Turn off the unit.
. Close the input port on the unit.
. Turn the Recover/Purge valve to the Purge position.
. Restart the unit.
. Run until desired vacuum is achieved.
. Close the ports on the recovery tank and the unit.
. Turn the unit off.
Ww ©) 1 © A: = WwW N
. Return the Recover/Purge valve to the Recover position.
10. Disconnect and store all hoses and dry filter.
Recover Recover
O ©
Open Open
o O
Evacuate Purge
o Close O
O
Purge
Ti ATA ET a AE PE hj = FEET RE ООД РЫ НЫ
A LIQUID PUSH/PULL METHOD
Push/pull method only works with large systems where the liquid refrigerant
is no less than 10kg.
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.
1. Put Recover/Purge knob on Recover.
2. Open Output valve.
3. Open Input valve.
4. When the scale stops rising close all ports.
5. Switch off the machine.
HVAC System
s e
91 STORAGE TANK COOLING METHOD
Pre-work Cooling Procedure
= FRE AE UL RA
1. To start you must have a minimum of 0.5kg of liquid refrigerant in the
tank.
2. Turn the Recover/Purge valve to the Recover 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 unit.
6. Throttle the Output valve of the unit so that the output pressure is 100psi
greater than the input pressure, but never more than 300psi.
7. Run until tank is cold.
Vapor Liquid
Vapor
Tank Cooling Procedure in the recovering process
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 Pre-work Cooling Procedure.
Manifold |
gauge set
Un
EVACUATION MODE
1.Turn RECOVER/EVACUATE valve to EVACUATION position.
2.Switch POWER switch to ON position, you will hear the fan running.
3.Switch MODE switch to EVACUATE position.
HVAC System
4.Run until desired vacuum is reached.
5.Switch off the machine .
6.Disconnect and store all hoses.
7.Cap the inlet and outlet port to prevent contamination,
Recover
5 over
pris tious
N. Close
O
Purge
VACUUM PUMP MAINTENANCE
Vacuum Pump Oil
The condition and type of oil used in any vacuum pump are extremely
important in determining the ultimate attainable vacuum. We recommends
the use of High Vacuum Pump Oil.
The oil has been specifically blended to maintain maximum viscosity at
normal running temperatures and to improve cold weather starts.
Vacuum pump oil change procedure
1.Warm up the vacuum pump by running.
2. Turn the POWER switch off, and unplug the unit from power source.
3.Place the unit on a raise surface, and place a suitable container under drain plug.
4.Remove the OIL FILL cap and OIL DRAIN cap.
5.Drain oil into container until flow of oil has completely stopped.
6.Replace the OIL DRAIN cap.
1.Fill oil reservoir with new vacuum pump oil until oil just shows at the bottom of
the sight glass. The approximate oil capacity is 20 ounces.
8.Be sure the inlet port is capped and turn vacuum pump.
9.Allow pump to run for one minute, then check the oil level. If the oil below the
sight glass OIL FILL line, add oil slowly(while pump is running) until the oil
reaches the OIL LEVEL line.
10.Replace the OIL FILL cap, make sure the inlet is capped and the drain cap is tight.
®
TROUBLESHOOTING
PROBLEM CAUSE ACTION
Fan does not run when | Powersupply cordnotattached | Attach the power supply cord.
Voltage is not right Check the power supply at job
Power Switch is in
“ON” position
The fuse has opened
site.
Change another new fuse.
Fan runs but compressor
does not start when the
Mode Switch is in
“Recovery” position
The unit is in high pressure
shut off
Output pressure is too high
Failure in motor, or other
electrical components
Reduce pressure and then press
the button of the High Pressure
Switch.
Rotate Input valve to “CLOSED” ,
Purge valve to “PURGE” :
then rotate Input valve back to
“OPEN” , Purge valve to
“RECOVER” .
Factory service required
Compressor starts but
cuts off within a few
minutes
Purge valve is in “PURGE”
position
Output valve is not open
and high pressure activates
Recovery tank valve is not
open
Rotate Purge valveto “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
Storage Tank Cooling Method
Factory service required
Unit does not pull out
a vacuum
Connecting hoses are loose
Leakage in unit
Tighten the connecting hoses
Factory service required
©
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