Fieldpiece MR45 User manual

Fieldpiece®
Refrigerant
Recovery Machine
OPERATOR'S MANUAL
Model MR45 (for models with Zero Stop)

32
Contents
Safety Information. . . . . . 4
Warnings
Caution
Description . . . . . . . . 8
Features
What’s included
Specifications . . . . . . . 10
Certifications . . . . . . . 11
UL Veried Performance Data
Tech Tips . . . . . . . . .12
General
Setup
Operational
Controls . . . . . . . . . 14
Display and Buttons
Status Icons and Messages
Port Routing Control
MR45 Refrigerant Flow
Dynamic Pressure Measurement
Functions . . . . . . . . . 22
Self Test
Self Purge
Purging a Recovery Cylinder
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:
• Do not operate in a wet location as electrical shock risk.
• 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 flammable
• Only work in well-ventilated areas (at least 4 air exchanges per hour)
• Ensure power and extension cords are in good working condition to
prevent shock and spark hazards
• Prevent motor overheating by using 14AWG minimum and 50AWG
maximum cord size
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 flammable refrigerants
• Have emergency, evacuation, and fire 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 flammable refrigerant leak detector within this zone
• Ensure at least 5 air exchanges per hour within this zone

76
Intentionally Blank
• Make power connection of the recovery machine and other equipment
outside of the Temporary Flammable Zone
• Bond the recovery machine outlet port to the recovery tank’s unpainted
fitting 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 the
machine and cause accidental sparking
• Always remain in attendance and observant when the machine is
running
• Do not mix flammable 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 qualified persons in order
to avoid a hazard
• Avoid overfilling recovery tanks by following refrigerant manufacturer’s
filling instructions and using a weight scale
• Avoid cross contamination (mixing) of refrigerants
• Ensure mesh screen filter is installed & clean (page 30)
• Use a filter 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 the
recovery machine
• Perform a self test periodically (page 22)

98
Features
• Lightweight (22 lbs)
• Smooth and Fast Operation (1 HP DC Motor)
• Digital Display with Status Messages
• Reliable Rubberized Construction
• Easy to Access Port Design
• Hex Nut Secures Input Port During Hose Removal
• Power Cord Storage
• Ceramic Cylinders
• Class A2L Refrigerant Compatible
• Zero Stop (3 Selectable Auto-stop Levels)
• Self Purge
• Wide Operating Voltage (95 to 130 VAC)
• UL Verified to Section 608 of EPA Clean Air Act
• UL Verified to AHRI Standard 740
What’s Included
MR45 Refrigerant Recovery Machine
10 Extra Mesh Screens for Input Port
3 Extra O-ring for Input Port
Operator’s Manual
1 Year Warranty
Description
The MR45 is the rst variable speed DC motor
recovery machine with a digital display. Pump
refrigerant more easily and quietly than ever
before. Connect hoses without navigating around
dark tight spaces or picking the pump o the
ground. View status messages and pressures
directly on the big bright display.
Carry the machine to and from the job site
easily and well protected from environmental
hazards.Turn the single rubberized control valve
to route refrigerant through MR45, and use the
self-purge function to pump the last traces into
the recovery cylinder instead of being left in the
machine or released into the environment.
Class A2L compatibility for a wide range of jobs.
To resist contaminating recovered refrigerant,
MR45 automatically stops at 0 psig/bar by default.

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:
-30”Hg to 600 psig (-76 cmHg to 4100 kPa)
Output Port Pressure Sensor Range:
-30”Hg to 600 psig (-76 cmHg to 4100 kPa)
High Pressure Cutoff: 558 psig (3850 kPa), nominal
Resolution and Units: 1 psig (1”Hg), 0.05 bar (2 cmHg),
0.01 Mpa (2 cmHg), 5 Kpa (2 cmHg)
Pressure Sensor Accuracy:
± 0.5“ Hg, ± 1.3 cmHg (Vacuum)
± (0.6% of reading +2 psig), ± (0.6% of reading +14 kPa)
Final Recovery Vacuum: 14.9”Hg, 38 cmHg
Compressor: Twin cylinder reciprocating (oil-less)
DC Motor: 1 HP (variable smart speed)
Power Source: 120 VAC @ 60 Hz 1 phase
Nominal Current Draw: 12.0 AAC
Valve: Single dual-route ball valve
Input Port Filtration: 9 mm mesh screen, stainless
Dimensions: 14.8 inch x 9.8 inch x 13.5 inch
376 mm x 250 mm x 344 mm
Weight: 22 lbs, (10kg)
Operating Environment: 32°F to 104°F (0°C to 40°C)
Storage Environment: -4°F to 140°F (-20°C to 60°C)
Approved Refrigerants: R12, R134A, R22, R401A (MP39), R401B,
R401C, R402A, R402B, R404A, R406A, R407A, R407B, R407C,
R407D, R408A, R409A, R410A, R411A, R411B, R412A, R500, R502,
R507, R509.
US Patent: www.fieldpiece.com/patents
Certifications
WEEE (Do not dispose through
typical waste streams.)
IN ACCORDANCEWITH SECTION 608 OF THE CLEAN AIR ACT:
THIS EQUIPMENT HAS BEEN CERTIFIED BY UNDERWRITERS
LABORATORIES INC. TO MEET EPA’S MINIMUM REQUIREMENTS FOR
RECOVERY EQUIPMENT INTENDED FOR USE WITH CATEGORY III, IV,
AND V REFRIGERANTS OUTLINED IN AHRI 740, TABLE 4.
<SA44565>
UL Verified Performance Data
Refrigerant R22 R134A R407C R410A
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 filter (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”fitting).
Core depressors removed.
Ball valve shutoffs instead of low loss fittings.
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 valves.
5. Use the push-pull method if recovering over 30 lbs (14kg).
6. Evacuate your empty recovery cylinders to 29.6”Hg (75 cmHg)
before use.
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% filled 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. You can use a heat gun to warm refrigerant lines to boil trapped
refrigerant.
4. 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
Power Cord Storage
1514
Controls

17
Display and Buttons
UNITS
Refrigerant Recovery Machine
MR45
START
STOP
CANCEL
ALARM
MUTE
PRESS 3 SEC
PRESS 3 SEC
ZERO
SENSOR
PRESS 3 SEC
AUTO-STOP
LEVEL
Input Pressure Output Pressure
Status Icons and Messages
START/STOP
Start or Stop the motor.
ZERO SENSOR (press 3 seconds)
Zero pressure sensors. Ports must be open to atmosphere.
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.
AUTO-STOP LEVEL (press 3 sec. to enter setup)
Once entered, press to change the pressure/vacuum level that
triggers the first automatic stop: 0 psig (default), -10 psig, -20psig.
Wait 5 seconds to exit setup, automatically saving desired setting.
Status Icons and Messages
UNITS
Refrigerant Recovery Machine
MR45
START
STOP
CANCEL
ALARM
MUTE
PRESS 3 SEC
PRESS 3 SEC
ZERO
SENSOR
PRESS 3 SEC
AUTO-STOP
LEVEL
The icon rotates when the motor is running.
The icon is shown when MR45 is set to MUTE.
OK TO START
Motor stopped. Temperatures, voltages, and pressures are currently
safe to start the motor again.
COMPLETE / Low Pressure Cutoff
Motor stopped. Input pressure/vacuum reached one of three
auto-stop levels for 10 seconds: 0 psig, 10”Hg vac, or 20”Hg vac
(0 bar, 25 cmHg vac, or 50 cmHg vac)
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 Cutoff
Motor stopped. Output (cylinder) approached dangerous pressure.
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 19).
Motor Fault 3
Motor stopped for unknown reason.

1918
Port Routing Control
OR
OR
CLOSED
• Input and Output closed.
• Set to either closed position to close
off 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 flow of refrigerant so the
machine operates more smoothly.
• Only throttle as much as needed for
smooth operation.