Nanjing Wonfulay Precison Machinery CMEP-OL User manual

CMEP-OL
Oil Less Explosion Proof Recovery Pump
Operating Manual
Nanjing Wonfulay Precison Machinery Co.,Ltd

Table of Contents
I.Important Safety Instructions
II. Specifications
III. introduction
IV. Recovery operation
V. Routine Maintenance
VI. Gas tightness inspection method
VII. Troubleshooting Tips
VIII. Warranty

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I. Important Safety Instructions
R600/R600a/R290 belong to flammable substance, so when they are recycled,
special attention has to be paid to the following safety precautions:
1. The overfilling of recycled tanks may cause violent explosion, leading to
personal injury or death.
2. Under the condition of pressure, all pipelines may contain liquid substance inside.
Any contact with the liquid substance may cause harm. In the operation, put on
protective garments and safety goggles and special attention has to be paid when
removing the underground pipelines.
3. Don't use this unit in a small, unventilated room or stuffy environment.
4. The connection of the recovery machine and pipelines has to be reliable and tight.
5. The gas tightness inspection has to be implemented every time before the recovery
machine is used.
6. It has to be checked whether the power supply connection wire is damaged or not
before the recovery machine is used and if it is, it cannot be used.
7. Don’t use this device to recycle the substance R600/R600a/R290 in the
environment with sparks and inflammable substance.
8. Before the operation,please read the instructions carefully and relevant operating
manual and comply with the safety precautions in the manual.
If having any questions before using the device, contact your equipment supplier or
equipment manufacturer.
Special safety precautions
Although the design of this device satisfies the requirement of recovery the
inflammable substance like R600/R600a/R290,but there are many undetermined factor
in the actual working environment,so in order to enhance the operation safety, the
ventilation of the surroundings must be implemented to recycle the inflammable
substance like R600/R600a/R290 and when undertaking the task in a narrow and small
space,extra ventilation is needed. In addition, check whether the connection of your

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recovery machine and the recovery pipelines is tight and there mustn’t be any leaks,
which must be paid special attention to, or there will be the damager of explosion.
（Warning: the density of refrigerants like HC and some new refrigerant liquid is
relatively low. The float switch of the traditional steel cylinders may stop working when
the refrigerants in them reach 80% due to the above reason, producing no protective
effect, so you need an electronic scale to monitor whether the tanks are overfilled.）
III. Technical parameters
Model
CMEP-OL
Applicable medium
R600/R600A/R290
Compressor
Oil-free lubrication
Gas displacement of the compressor
1.25CFM
Maximum recovery rate
71.6kg/h
Horsepower
1HP
Voltage
115VAC/60HZ
High voltage protection
2.5Mpa
Minimum vacuum degree
0.05inHg
Weight
43kg
III. Introduction
The CMEP-OL recovery machine was specially designed for R600/R600A/R290 and all
the parts was designed according to ExdiiAT3 explosion-proof standard, including the
stainless steel UL listed explosion-proof motor,stainless steel compressor, condenser,
pipeline and PTFE seals .Especially the twin-cylinder high efficiency compressor make
the recovery rate very fast.The UL,ETL and patent is pending

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1. Outlet pressure gauge
2. Inlet pressure gauge
3. High voltage protective reset switch
4. Power switch
5. Inlet connection
6. Outlet connection
7. Power supply connection
8. Inlet valve
9. Outlet valve
IV. Recovery operation
1. Connect the pipelines according to the actual need and pump out the air in them.
2. Connect the power line of the machine and plug it in.
3. Switch on the inlet and outlet valves of the recovery machine
4. Switch on the power switch of the recovery machine and start the recovery
5. When recovering to the needed vacuum degree, switch off the recovery machine and
its valves.
V. Routine maintenance
1. Check whether the power line is damaged or not every time before it is used.
2. Check whether the gas tightness of the machine is favorable every time before it is
used.
3. If this device is put away and not going to be used for an extended period of time,
suggest rinsing the interior pipelines of the machine with dried nitrogen.
VII. Ways to check gas tightness

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1. Switch off the outlet valve of the recovery machine and fill it from the inlet valve with
any of the gases R600/R600A/R290 with certain pressure and then check whether the
inside of the machine is leaking.
2. Switch on the inlet and outlet valves of the recovery machine，discharge the residual
gas inside the machine and star the recovery machine. After 1 minute, switch off the
outlet valve and the gauge hand of the outlet pressure gauge of the recovery machine
rises. When it rises to about 2.5 Mpa，the high voltage switch switches off and the
machine stops. Then connect the exit and entrance with a soft pipeline and switch on the
outlet valve to let air in the inlet valve after the connection. About 5 minutes later，the
low pressure area and the high pressure area in the compressor of the machine are in a
balance in pressure. Switch off the inlet and outlet valves and observe whether the inlet
pressure gauge and outlet pressure gauge are leaking. If in a shorter time, there is a sharp
drop, it means that the inside of the machine is leaking. If there is no sharp drop, it means
it can be used normally without any repair. Reset the high voltage switch after the
leakage checking.
VII. Troubleshooting Tips
PROBLEM
CAUSE
Handling measures
The power
connecting the
machine
doesn’t work
Power supply cord
not
attached or no
power
Check the lines
voltage is incorrect Check voltage
High pressure switch
is cut.
reset
Slow recovery
speed
The suction
pressure is too low
Increase the suction pressure

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The discharge
pressure is too high
Reduce the discharge pressure
The connecting
hose is blocked.
Check the connecting hose.
The tightness of the
compressor is
unfavorable
Factory maintenance required.
VIII. Warranty
This product is warranted to be free from defects in workmanship, materials, and
components for a period of two years from date of purchase. All parts and labor required
to repair defective products covered under the warranty will be at no charge.
1. The limited warranty is only applicable for the original buyer.
2. The warranty applies to the product in normal usage situations only, as described in
this operating manual. The product must also be serviced and maintained as specified.
3. If the product fails, it will be repaired or replaced at the option of the manufacturer.
4. .The manufacturer shall not be responsible for any additional costs associated with
product failure including, but not limited to, loss of work time, loss of refrigerant, and
unauthorized shipping and/or labor charges.
5. All warranty service claims must be made within the specified warranty period.
Proof-of-purchase date must be supplied to the manufacturer.
6. It is not within the scope of warranty if the recovery machine is used to recover
non-stipulated materials.
This limited warranty does not apply if :
·The product, or product part, is broken by accident.
·The product is misused, tampered with or modified.
·The product is used for recovering any substance other than the specified refrigerant
type.