Refco ENVIRO-DUO User manual

Instruction Manual
Two – Piston Recovery Station
Bedienungsanleitung
Zwei-Kolben-Absauggerät
Mode d'emploi
Station de récupération à double piston
Istruzioni per l'uso
Unità di recupero a due pistoni
Manual de instrucciones
Estación de recuperación de dos pistones
ENVIRO-DUO
4686353

Instruction Manual ENVIRO-DUO English
OPERATING INSTRUCTIONS
ENVIRO-DUO
Table of Contents
1. General Information……………… …………………1…
2. Safety………………………………………………………3
2.1 Personnel Qualifications…………………………3
2.2 Special Hazards……………………………………4
2.3 Labels / Safety Markings…………………………7
3. Technical Specifications………………………………8
4. Parts Description…………………………………………9
5. Instruction of Operation Panel………………………10
6. Electrical Diagram……………………………………11
7. Operation………………………………………………12
8. Recovery Method………………………………………15
9. Self-Purge Method……………………………………17
10. Liquid Push / Pull Mode………………………………18
14. Recycling…………………………………………………23
11. FAQ and Trouble Shooting……………………………20
12. Maintenance……………………………………………22
13. Service……………………………………………………23

English Instruction Manual ENVIRO-DUO
1. General Information
Thank you for purchasing the ENVIRO-DUO Refrigerant
Recovery Machine!
ENVIRO-DUO combines an innovative refrigerant gas
compression system with a rugged, moulded case that is
designed to offer maximum protection from damage during
transit and normal handling.
With normal use and with care as prescribed in this Manual,
your ENVIRO-DUO will give you years of trouble-free
operation.
Safety First!
When found on the machine, this international symbol
is intended to alert the user to the presence of important
operating, safety and maintenance (servicing) instructions
in this Manual. As used in the Manual, it is draw
your attention to critical items.
It is important to read this entire Manual and be familiar with
its contents before using the machine!
intended to
The ENVIRO-DUO is a Recovery Machine for a broad range
of refrigerants. Recovering refrigerants into a separate
storage cylinder involves a process of gas compression,
resulting in high pressures within the machine, the connecting
hoses and the storage cylinder. High-pressure systems must
always be treated with care and respect to prevent careless
accidents.
1

Instruction Manual ENVIRO-DUO English
The ENVIRO-DUO has been designed to meet the
requirements of the Standard for Refrigerant Recovery
Machines, ARI and certification.
If an approved cylinder with overfill is not available always
use an approved scale to monitor the cylinders capacity.
Additionally, approved refrigerant hoses must be used which
have shut-off devices within 300 mm of the ends to reduce
the likelihood of refrigerant leakage to the atmosphere when
changing cylinders or setups.
Product Safety:
A qualified technician who has been properly trained in the
care and use of such equipment and in the recovery process
itself must only operate the ENVIRO-DUO.
Responsibility:
The operating instructions are part of the product and
must be stored in close proximity to the ENVIRO-DUO
where they should be readily accessible to qualified
personnel at all times.
The qualified personnel must have carefully read and
understood the operating instructions prior to operating
the device.
The manufacturer shall not be liable for any damage
whatsoever arising through improper use, failure to comply
with these operating instructions, assignment of inadequately
qualified personnel, or unauthorised modification of the
ENVIRO-DUO.
The General Terms and Conditions as set out in the sales
documentation shall apply.
Subject to technical modifications.
2

2.1 Personnel Qualifications
Risk of injury through use by unqualified personnel!
Improper handling of the device can lead to serious
personal and material damage.
WARNING!
2. Safety
English Instruction Manual ENVIRO-DUO
Key to symbols
… indicates electrical hazard. Failure to comply
with these safety instructions may result in serious
injury or death.
DANGER!
… indicates a potentially hazardous situation that
could result in serious injury or death if not avoided.
WARNING!
Before setup and operation of the device, ensure
that it is not damaged in any way. Failure to comply
could result in serious physical injury and/or material
damage.
WARNING!
Risk of death by electrocution.
DANGER!
3

The activities described in these operating instructions
should only be carried out by skilled personnel in
possession of the qualifications outlined below.
Keep unqualified personnel away from hazardous areas.
Instruction Manual ENVIRO-DUO English
Skilled personnel are workers who, through their specialist
training and operational knowledge of the recovery machine,
are capable of carrying out the described work and
independently identifying potential hazards.
Skilled personnel
ONLY QUALIFIED SERVICE PERSONNEL SHOULD
OPERATE THIS UNIT. MOST STATES AND
COUNTRIES, MAY REQUIRE THE USER TO BE
LICENSED. PLEASE CHECK WITH YOUR LOCAL
GOVERNMENT AGENCY.
2.2 Special Hazards
Before starting the Equipment assure that it is
well grounded.
Risk of serious injury and death!
While using the electrical wire, the wire must be
well connected and grounded.
Risk of serious injury and death!
Only a qualified electrician should perform wire
connection according to the technical standard
and circuit diagram.
Risk of serious injury and death!
4

When using an extension cord, the cord should
2
be a minimum of 1.5 mm (15 awg) and no longer
than 7.5 m. Otherwise Voltage may drop and damage
the compressor! The cable must be completely
unrolled.
English Instruction Manual ENVIRO-DUO
Be sure the power is off before examining or
repairing the recovery unit. Risk of serious
injury and death!
Use only authorized refillable refrigerant tanks.
The Unit requires the use of recovery tanks with
a minimum working pressure of 40 bar (580psi).
Do not overfill the recovery tank. Tank is full at
80% capacity. There should be enough space for
liquid expansion.
Overfilling of the tank may cause a violent
explosion.
A charging scale is required to prevent overfilling.
It is compulsory to wear safety goggles, and protective
gloves while working with refrigerants to protect
skin and eyes from refrigerant gas and liquid. Avoid
any contact with caustic gas or liquid.
Risk of serious injury!
Be sure that any room where work is being
conducted is thoroughly ventilated.
5

Instruction Manual ENVIRO-DUO English
Input pressure of the unit should not exceed 26
bar (377 psi).
Only keep unit in a horizontal position, otherwise
unexpected vibrations, noise or abrasions may
occur.
Avoid exposing the equipmment to the sun or rain.
USE CAUTION WHEN OPERATION OUTDOORS.
Be certain that the power cord, the cylinder overfill
safety cord and the unit itself are not placed in
water or other potentially dangerous locations.
While the ENVIRO-DUO is very safe to operate,
using in environments such as hard rain or sand
and dust storms must be avoided.
FLAMMABLE ENVIRONMENTS ARE
DANGEROUS
when any machine is used because motors and
switches can generate sparks. This equipment should
be used in locations with mechanical ventilation
providing at least four air changes per hour, or the
equipment should be located at least 50 cm above
the floor.
DO NOT USE THIS EQUIPMENT IN THE
VICINITY OF SPILLED OR OPEN CONTAINERS
OF GASOLINE OR ANY OTHER FLAMMABLE
6

Do not block the ventilation opening of the unit.
If the overload protector pops, reposition it after
5 minutes.
English Instruction Manual ENVIRO-DUO
2.3 Labels / Safety Markings on Machine
Identification plate
7

Instruction Manual ENVIRO-DUO English
8
3. Technical Specifications
Refrigerant
Category Ⅲ
Category Ⅳ
Category Ⅴ
Power
Motor
Motor Speed
Current
Compressor
Gas
R-12, R-134a, R-401C, R-406A, R-500
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
R-402A, R-404A, R-407A, R-407B,
R-410A , R-507
0.75 kW
1450rpm@50Hz
5A@50Hz
Oil-less, Air-cool, Piston
38.5bar/3850kPa (558psi)
0.40 Kg/min
Category Ⅲ
Liquid
Ambient
Temperature
Dimensions
Net Weight
3.00 Kg/min
7.50 Kg/min
Category Ⅳ
0.60 Kg/min
3.50 Kg/min
8.50 Kg/min
Category Ⅴ
0.80 Kg/min
3.50 Kg/min
9.50 Kg/min
0°C-40°C/32-104°F
400mm(L)×250(W)mm×345mm(H)
15.8kg
High Pressure
Protection
Recovery Speed
Push/Pull Mode
220-240V CA 50-60 Hz

English Instruction Manual ENVIRO-DUO
9
4. Parts Description
No. Component No. Component
1
2
3
4
5
6
7
8
9
10
11
12
13
O.F.P. Cable
Front Panel
Control Valve
Starting Capacitor
Copper Pipes
Junction Box Cover
Compressor
Running Capacitor
Fan
Fan Cover
Power Supply Cord
Base
Cover

Instruction Manual ENVIRO-DUO English
10
5. Instruction of Operation Panel
OVERFILL
CABLE SOCKET
INTAKE PORT
INLET FILTER INCL. O-RING
FILTER THRED ADAPTER

English Instruction Manual ENVIRO-DUO
11
6. Electrical Diagram
ITEM Graphics
Code Description Remarks
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
XS
SA
FR
M1
SR
C1
C2
ST
TC
HP
LP
OFP
d1,d3
d2
SC
SB
CTR
K1
Power Outlet
Power Switches
Overload Protection Device
Compressor Motor
Centrifugal Switch
Start Capacitor
Running Capacitor
Motor Thermal Protectors
Electronic Transformer
High Pressure Switch
Low Pressure Switch
80% O.F.P. Switch
Red Indicator
Green Indicator
Option Switch
Start Button
Control Module
Relay

Instruction Manual ENVIRO-DUO English
12
7. Operation
Do not mix different refrigerants together in one tank,
otherwise they cannot be separated or used.
1.
The switch should be at“Position 0”before operation. All
the valves must be closed, the input and output fittings
should be covered with protective caps when the unit is
not in operation. Air humidity is harmful to the recovery
result and will shorten the life span of the unit.
2.
A filter drier should always be used and should be replaced
frequently. Each type of refrigerant must have its own
filter. For the sake of ensuring the proper operationof the
unit, please use the filter specified by our company.
High quality filter drier will bring high quality services.
3.
Special caution is needed when recovering from a burnt
system. In this case two dry filters are required.
4.
The unit has an Internal High Pressure Shut-Off Switch.
If the pressure inside the system is above 38.5 bar, the
compressor will automatically shut off the power.
To restart the compressor, please lower the internal pressure,
then push on the start button to restart the compressor.
5.
When High Pressure Protection is initiated, please find out
the cause and deal with it before restarting the unit.
Cause of High Pressure Protection and Trouble Shooting:
The input value of the refrigerant tank is closed — open
the valve to solve the problem.
a.

English Instruction Manual ENVIRO-DUO
13
The connecting hose between the recovery unit and
refrigerant tank is stuck — close all the valves and replace
the connecting hose.
b.
The temperature of the refrigerant tank is too high,
therefore, pressures is too high — give it some time to
cool down and the pressure will come back to normal.
c.
The unit has an Internal Low Pressure Shut-Off Switch
and delay circuit. If the pressure inside the system is below
-2.5 ~ -6.8 psi for 20 seconds, the unit will auto-matically
shut off and the Green Alarm Light will switch on.
d.
This unit can be used together with a overfill level sensor.
Please connect the recovery unit and the tank with the
80% O.F.P. Cable (Item 1 in the PARTS DIAGRAM).
If the liquid refrigerant reaches 80% capacity of the tank,
the recovery unit will automatically shut off and the Red
Alarm Light will switch on (80% O.F.P. ALARM). Before
restart please replace tank.
e.
When the unit completes recovery and purge oper-ation,
there is no pressure in the intake port. Therefore the unit
can only run for 20 seconds after restart.
When the input pressure is above 0.8 bar (11 psi), the
unit will run continuously.
If the refrigerant tank has no float level sensor, please
take the 80% O.F.P Cable off. Otherwise the recovery
unit can not start. In this case, an electric scale is required
to monitor the recovered refrigerant amount.
f.

If it is difficult to start the unit, please turn the Switch
two rounds to balance the internal pressure and make
it easier to start the unit.
m.
The Low Pressure Gauge shows the pressure of the
intake port of the compressor and the High Pressure
Gauge shows the pressure of the outlet port.
n.
After recovering, make sure there is no refrigerant left
in the unit. Read the Purge Operation carefully. Liquid
refrigerant remaining in the unit may be expanded and
damage the components.
I.
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.
j.
A connection hose with check valve is recommended, it
can prevent refrigerant loss.
k.
The intake port is equipped with filter screen;
please wash it frequently to keep it clean.
l.
Instruction Manual ENVIRO-DUO English
14
In order to gain maximum recovery speed, a hose with
inner diameter bigger than 4 mm and shorter than 1.5 m
is recommended.
g.
While recovering large amounts of liquid, use the
Push/Pull Mode.
h.
After Using, please turn the knob to "0" position.
o.

English Instruction Manual ENVIRO-DUO
15
Turn the Switch to position "1".
1.
8. Recovery Method
Correctly and firmly connect the hoses.
(See Connection Drawing)
2.
Connect the unit to the right power supply (as shown
on the Name Plate), turn the power on to start the unit.
3.
Push the START button to turn on the unit.
4.
Open the valve of the refrigerant tank.
5.
Open the liquid valve on the manifold gauge.
6.
Slowly turn the Switch to position "2" for faster recovery.
7.
HVAC System
Manifold
gauge set
Vapor
Liquid
Input Filter
Output
Vapor valve
Scale
80% O.F.P.
float cable
Liquid valve
Tank

If the knob is turned to position “1” and the unit it running,
a stable recovery of liquid refrigerant can occur, but
at a lower recovery rate. If liquid impacting occurs in
the compressor when at position “1”, slowly turn the
knob clockwise to position “start”. The reading of low
pressure gauge will decrease until the impacting stops.
The pressure should be above “0”, because it cannot
intake if the pressure is “0”.
b.
When liquid recovery is finished, turn the Switch to
position "2" for faster recovery.
8.
The unit will automatically stop when recovery is finished,
please start the Purge operation now.
9.
Instruction Manual ENVIRO-DUO English
16
If liquid impacting occurs in the compressor when at
position “2”, please turn the knob to position “start”
slowly. The reading of low pressure gauge will decrease
until the impacting stops, but the pressure should be
above“0”, because the intake port cannot intake when
the pressure is “0”.
If it is difficult to start or restart after power off , please
turn the knob to position “START”, then turn on the
power and hit the RESET button.
Notice:
a.

9. Self-Purge Method
English Instruction Manual ENVIRO-DUO
17
①Do not turn off the power when the "complete" light
turns green and unit stops running, please hit the reset
button first, then turn the switch to position "3" to start
purge.
②If the ultimate vacuum meets your request but the
unit is still running, please turn the switch to position
"3" to start purge directly.
1.
When the required vacuum is reached, purging ends.
2.
a.
b.
c.
d.
e.
f.
Close the valve on the refrigerant tank.
Close the check valves on the connecting hoses.
Close the liquid valve and gas valve on the manifold
gauge.
Close the connecting valve between the refrigeration
system and the manifold valve.
Turn the power off, and disconnect all the external
hoses.
Cap the intake port and the outlet port.