Fieldpiece MR45UK 110VAC User manual

Fieldpiece®
Refrigerant
Recovery Machine
OPERATOR'S MANUAL
Model MR45UK 110VAC

32
Contents
Safety Information. . . . . . 4
Warnings . . . . . . . . . 5
What’s Included. . . . . . . 7
Description . . . . . . . . 8
Features
Certications . . . . . . . 9
Specications . . . . . . . 10
Performance Data
Tech Tips . . . . . . . . .12
General
Setup
Operational
Controls . . . . . . . . . 14
Display and Buttons
Status Icons and Messages
Port Routing Control
MR45UK Refrigerant Flow
Dynamic Pressure Measurement
Functions . . . . . . . . . 22
Self Test
Self Purge
Purging a Recovery Cylinder
80% Overll Sensor Cable Port
Direct Liquid/Vapor Recovery
Push/Pull Recovery
Troubleshooting . . . . . . 28
Status Messages
Other Symptoms
Maintenance. . . . . . . . 30
General
Mesh Screen Filter
Limited Warranty . . . . . . 32
Obtaining Service

54
Safety Information
Read, understand, and follow this entire
manual, with special attention given to Warning
and Caution statements before operating this
machine.
For use only by qualified and certified
technicians in the safe use, handling, and
transporting of refrigerants. This machine is
designed to recover most CFC, HFC, HCFC,
and some HFO refrigerants that have an A1 or
A2L flammability rating only. Please refer to
flammable refrigerant safety guides, regional
codes and legislation for more information.
!
WARNING
FAILURE TO HEED THESE HAZARDS AND ACTIONS CAN RESULT IN
SERIOUS INJURY OR DEATH:
• Machine is only rated for use on 110VAC mains power
• Always use a grounded outlet
• Always wear Proper Protective Equipment (PPE), which includes gloves
and safety glasses and earplugs
• Know proper safety and handling requirements of the refrigerant in the
Safety Data Sheet (SDS)
• Avoid breathing refrigerant and oil vapors
• Handle hoses and equipment carefully as refrigerant is under high
pressure and can cause frost bite
• Do not operate in or near explosive atmospheres
• Do not use with hydrocarbons (HC)
• Perform leak detection in accordance with recommended practice to
verify working environment is free from leaking refrigerant as it can be
toxic and or ammable
• Only work in well-ventilated areas (minimum of 4 air exchanges per
hour)
• Ensure power and extension cords are in good working condition to
prevent shock and spark hazards
ADDITIONAL SAFETY INSTRUCTIONS FOR RECOVERING A2L
REFRIGERANTS (e.g. R-32, R-1234yf, R-1234ze):
• Adhere to local occupational safety codes and possess detailed
knowledge and skills when handling mildly ammable refrigerants
• Have emergency, evacuation, and re protection plans
• Designate and monitor aTemporary Flammable Zone with a 3-meter
perimeter
• Identify and disable all possible ignition sources within this Zone
• Monitor air with a ammable refrigerant leak detector within this Zone
• Use a ventilation fan to maintain 5 air exchanges per hour within this
Zone
• Make power connection of the recovery machine and other equipment
outside of the Temporary Hazard Zone

76
What’s Included
• MR45UK Refrigerant Recovery Machine
• 10 Extra Mesh Screens for Input Port
• 3 Extra O-ring for Input Port
• Fixed 110V Cord with Industrial Plug
• Operator’s Manual
• 2 Year Warranty
• Bond the recovery machine outlet port to the recovery tank’s unpainted
tting with a grounding strap to dissipate static electricity build up
during during recovery process
• Ensure area around machine is free of debris that could enter air vents
and fan and cause accidental sparking
• Always remain in attendance and observant when the machine is
running
• Do not mix ammable refrigerants with air
• Use an evacuated DOT recovery tank
• If system has a suspected leak, stop recovery at 0 psig/bar to prevent
air from entering the recovery tank
• After recovery, purge system with 100% nitrogen before opening
system for repair
!
CAUTION
FAILURE TO HEED THESE HAZARDS AND ACTIONS CAN CAUSE
EQUIPMENT DAMAGE:
• Ensure that recovery machine, hoses, tank and other equipment are in
good working condition
• If the power cable is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualied persons in order to
avoid a hazard
• Avoid overlling recovery tanks by following refrigerant manufacturer’s
lling instructions and using a weight scale
• Avoid cross contamination by not mixing refrigerants
• Ensure mesh screen lter is installed & clean (page 30)
• Use a lter drier on the input port and change it often to protect
machine from contaminated refrigerants
• Ensure power switch is OFF before plugging into power
• Disconnect power and allow fan to stop before opening or servicing
MR45UK
• Perform self test periodically (page 22)

98
Description
The MR45UK is the first variable speed DC
motor recovery machine with a digital display.
Recover refrigerant easier and quieter than ever
before. Connect your hoses to the conveniently
placed ports without navigating around dark
tight spaces or picking the machine off the
ground. View status messages and pressures
directly on the big bright display.
Carry the lightweight machine to and from the
job site easily. Turn the single rubberized control
valve to route refrigerant through MR45UK,
and use the self-purge function to recover the
last traces into the recovery cylinder instead of
being left in the machine or released into the
environment.
Features
• Lightweight (10 kg)
• Smooth and Fast Operation (746 Watt DC Motor)
• Digital Display with Status Messages
• Reliable Rubberized Construction
• Easy to Access Port Design
• Hex Nut Secures Input Port During Hose Removal
• 80% Overll Sensor Protection Port
• Power Cord Storage
• Ceramic Cylinders
• Class A2L Refrigerant Compatible
• Self Purge
• Wide Operating Voltage (95 to 130 VAC)
Certifications
WEEE
Correct disposal of this product: This marking indicates that this
product should not be disposed with other household wastes throughout
the EU. 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 environmental
safe recycling.

1110
Specifications
Display: 2 x 10000 count LCD with status messages
Backlight: Blue color
Measurement rate: 3.3 times per second, nominal
Input Port Pressure Sensor Range:
-76 cmHg to 4100 kPa (-30”Hg to 600 psig)
Output Port Pressure Sensor Range:
-76 cmHg to 4100 kPa (-30”Hg to 600 psig)
High Pressure Cuto: 3850 kPa (558 psig), nominal
Pressure Relief Valve: 4.2 MPa (609 psig), nominal
Resolution and Units: 5 Kpa (2 cmHg), 1 psig (1”Hg),
0.05 bar (2 cmHg), 0.01 Mpa (2 cmHg)
Pressure Sensor Accuracy:
± 1.3 cmHg, ± 0.5“ Hg (Vacuum)
± (0.6% of reading +14 kPa), ± (0.6% of reading +2 psig)
Final Recovery Vacuum: 38 cmHg, 14.9”Hg
Compressor: Twin cylinder reciprocating (oil-less)
DC Motor: 746 Watt (variable smart speed)
Power Source: 95 to 130 VAC @ 50 Hz 1 phase
Nominal Current Draw: 12.0 A
Valve: Single dual-route ball valve
Input Port Filtration: 9 mm mesh screen, stainless
Noise: Sound pressure level <70 db(A)
Dimensions: 376 mm x 250 mm x 344 mm (14.8”x 9.8”x 13.5”)
Weight: 10 kg (22 lbs)
Operating Environment: 0°C to 43°C (32°F to 109°F)
Storage Environment: -20°C to 60°C (-4°F to 140°F)
Approved Refrigerants: 12, 22, 32*, 134A, 143A*, 401A, 401B, 401C,
402A, 402B, 404A, 407A, 407B, 407C, 407D, 408A, 409A, 410A,
448A, 452A, 500, 502, 507, 509, 1234YF*, 1234ZE*
* Class A2L (mildly ammable) refrigerant
Performance Data
Refrigerant R22 R134A R407C R410A
Push/Pull Recovery
(kg/min) 4.6 5.4 5.2 7.2
Liquid Recovery
(kg/min) 4.7 2.9 5.1 5.6
Vapor Recovery
(kg/min) 0.28 0.28 0.33 0.33
Final Recovery Vacuum
(kPa) 50.8 50.8 50.8 50.8
Residual Trapped
Refrigerant (kg) 0.005 0.008 0.004 0.005
High Temp (104°F) Vapor
Recovery (kg/min) 0.40 - - -

1312
Tech Tips
General
1. Store in the self purge or recover position. Do not store in the
CLOSED position as trapped air and refrigerant can expand and
damage components.
2. For extended storage, purge with nitrogen, set to RECOVER, and
screw non-sealing caps onto the ports.
3. Recovery machines are not vacuum pumps and should not be
used for deep evacuations.
4. Do not run the machine without the mesh screen lter (page 30).
Doing so will void the warranty and damage the machine.
5. Understand the refrigerant safety data sheet (SDS).
Setup
1. Know the refrigerant of the system and make sure your recovery
cylinder matches that type.
2. Hoses:
Short as possible (3/8”hose with 1/4”tting).
Core depressors removed.
Ball valve shutos instead of low loss ttings.
Replace if worn.
3. Manifold gauges are not necessary for recovery but can make it
more convenient and increase speed by having 2 system hook
ups.
4. Use a Schrader valve core removal tool to temporarily remove
valve cores from service ports.
5. Use the push-pull method if recovering over 14 kg (30 lbs).
6. Evacuate your empty recovery cylinders to 75 cmHg (29.6”Hg)
before use for fastest recovery.
7. Know how much refrigerant you expect to recover before
starting.
8. Ensure there’s enough room in the recovery cylinder to not
exceed 80% lled during the job, or monitor and have a second
cylinder ready.
9. Always purge hoses before recovery. If cylinder is too hot, use an
ice bath to reduce the temperature and pressure of the cylinder.
10. If cylinder pressure is higher than expected, you can purge non-
condensables into another cylinder (page 23).
Operational
1. Recover as much liquid as possible before recovering vapor.
2. Recovery is faster when the recovery cylinder is cooler.
3. Recover from both suction and liquid lines at the same time for
faster vapor recovery.

Port Routing Control Knob
Input Port
Mesh Screen Filter
Backlit Digital Dual
Display and Buttons
Output Port
80% Overll
Sensor Port
(Cable Not
Included)
Power Switch (Shown ON)
Power Cord Storage
Fixed Power Cord
Port and Plug
1514
Controls

1716
Display and Buttons
Input Pressure Output Pressure
Status Icons and Messages
START/STOP
Start or Stop the motor.
ZERO (press 3 seconds)
Zero pressure sensors. Set knob to RECOVER and uncap ports.
CANCEL ALARM
Cancel alarm currently sounding (temporarily mute).
MUTE (press 3 seconds)
Toggle mute for all sounds (setting is saved).
UNITS
Select pressure/vacuum units (setting is saved).
Status Icons and Messages
The icon rotates when the motor is running.
The icon is shown when MR45UK is set to MUTE.
OK TO START
Motor stopped. Temperatures, voltages, and pressures are currently
safe to start the motor again.
COMPLETE
Motor stopped. Purge or recovery has reached 25 cmHg or 50 cmHg
(10”Hg or 20”Hg) vacuum for 10 sec.
Tank 80% Full
Motor stopped. Overll sensor triggered by liquid level of
refrigerant in the recovery cylinder.
Input Closed
Cannot zero pressures. Open input port.
Output Closed
Cannot zero pressures. Open output port.
High Voltage Warning
Motor stopped. Voltage was above 130 VAC.
Low Voltage Warning
Motor stopped. Voltage was below 95VAC.
High Pressure Cuto
Motor stopped. Output (cylinder) approached dangerous pressure.
Low Pressure Cuto
Motor stopped. Input reached 25 cmHg or 50 cmHg (10”Hg or
20”Hg) vacuum for 10 sec.
Motor Fault 1
Motor stopped. Motor temp. measured above operating range.
Motor Fault 2 (“throttle” shows on display)
Motor stopped. Motor current (amps) rose above operating range.
Throttle RECOVERY to reduce cylinder pressure (page 29).
Motor Fault 3
Motor stopped for unknown reason.
Fault 3 (“PLug O.F.S” shows on display)
80% overll Sensor not detected. Plug sensor cable into cylinder.

1918
Port Routing Control
OR
OR
CLOSED
• Input and Output closed.
• Set to either closed position to close
o both ports during setup.
OR
OR
SELF PURGE
• Input closed, Output open.
• After recovery is complete, set
to this position to close the IN port
before you START the purge.
OR
OR
RECOVER
• Input and Output fully open.
• Set to this fully open position for
most of the recovery process.
OR
OR
RECOVER (throttled)
• Input and Output partially open.
• Rotate away from RECOVER in
either direction to reduce liquid
slugging if knocking occurs.This slows
the ow of refrigerant so the machine
operates more smoothly.
• Only throttle as much as needed for
smooth operation.