Fieldpiece
Refrigerant
Recovery Machine
OPERATOR'S MANUAL
99 Washington Street
Model MR45
Visit us at www.TestEquipmentDepot.com
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Contents
Important Notice . . . . . . 4
What’s Included. . . . . . . 4
Warnings .
Certifications
Description
Features
Specific
S
afety Information.
First Aid for Refrigerant Exposure
General
Environmental
Personal Protection
MR45 P
Setup
Operational
Tech Tips . . . . . . . . .12
General
Setup
Operational
. . . . . . . . 4
. . . . . . . 5
. . . . . . . . 6
ations
rotection
. . . . . . . 8
. . . . . 10
Controls . . . . . . . . . 12
Displa
Status Icons and Messages
P
MR45 R
Dynamic Pressure Measurement
Functions . . . . . . . . . 22
MR45 Self Test
Purging MR45
P
Dir
Push/Pull Recovery
Enhanced Direct Liquid Recovery
Troubleshooting
Status Messages
Other Symptoms
Maintenance. . . . . . . . 32
Limited Warranty . . . . . . 33
Obtaining S
y and Buttons
ort Routing Control
efrigerant Flow
urging a Recovery Cylinder
ect Liquid/Vapor Recovery
. . . . . . 30
ervice
32
Important Notice
!
This is not a consumer machine. Only qualified
personnel trained in the recovery or pumping of
refrigerant may operate this machine.
Read and understand this operator’s manual in
its entirety before using MR45 to prevent injury
or damage to you or equipment.
What’s Included
• MR45 Refrigerant Recovery Machine
• 3 Extra Mesh Screens for Input Port
• 1 Extra O-ring for Input Port
• Operator’s Manual
• 1 Year Warranty
WARNINGS
Do not use to pump hydrocarbons, explosion risk.
Do not use to pump flammable media, explosion risk.
Inhalation of high concentrations of refrigerant vapor can block
oxygen to the brain causing injury or death.
Refrigerant liquid can cause frostbite.
Certifications
WEEE
D
o not dispose through
typical waste streams.
IN ACCORDANCE WITH 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 ALL
SYSTEMS CONTAINING ANY MEDIUM, MEDIUM HIGH, AND HIGH
PRESSURE REFRIGERANTS LISTED IN TABLE 4, AHRI 740.
< SA44565 >
54
Description
The MR45 is the first variable speed DC motor
machine with a digital display. Pump refrigerant
easier and quieter than ever before. Connect
your hoses without navigating around dark tight
spaces or picking the pump off 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.
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.
Turn the single rubberized control valve
Features
• Lightweight (22 lbs)
•Smooth and Fast Operation (1 HP DC Motor)
• Digital Display with Status Messages
• Reliable Rubberized Construction
Easy t
•
• Hex Nut Secures Input Port During Hose Removal
•
• Ceramic Cylinders
• S
•
• Wide Operating Voltage (95 to 130 VAC)
• UL Verified to Section 608 of EPA Clean Air Act
• UL Verified to AHRI Standard 740
o Access Port Design
P
ower Cord Storage
elf Purge
IP25 f
or Operation in the Rain
76
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
Output Port Pressure Sensor Range: -30” Hg to 600 psig
High Pressure Cutoff: 558 psig, 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 (Vacuum)
± (0.6% of reading +2 psig)
Final Recovery Vacuum: 14.9” Hg
Compressor: Twin cylinder reciprocating (oil-less)
DC Motor: 1 HP (variable smart speed)
Power Source: 95 to 130 VAC @ 60 Hz 1 phase
Input Port Filtration: 11 mm mesh screen, stainless
Dimensions: 14.8” x 9.8” x 13.5”
376 mm x 250 mm x 344 mm
Weight: 22 lbs
Operating Environment: 32°F to 122°F (0°C to 50°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.
Max Current Draw: 12.0 AAC
Valve: Single dual-route ball valve
98
Safety Information
First Aid for Refrigerant Exposure
Inhaled: Move to fresh air immediately.
Eye: Immediately flush eye with water. Seek medical attention.
Skin: Immediately flush skin with water. Seek medical attention.
General
1. This is not a consumer machine. Only qualified personnel trained
in the recovery or pumping of refrigerant may operate this
machine.
Read and understand this oper
2.
using MR45 to prevent injury or damage to you or equipment.
Environmental
1. Use only within operating conditions (32-122°F)
2. Ensure fan opening is clear of debris.
3. Explosion and fire risks:
Do not use near sewer lines.
Do not use in poorly ventilated enclosed areas.
Do not use near gasoline, acetylene, or other flammable gases.
Do not use to pump hydrocarbons.
Do not use near flames or sparks.
Assume all components are pressurized.
Personal Protection
1. Frostbite danger. Be careful using hoses.
2. Use personal protective equipment:
Wear safety goggles.
Wear earplugs if using for long durations.
Wear protective gloves.
ator’s manual in its entirety before
MR45 Protection
1. Use only on approved list of refrigerants (page 9).
2. Do not use with hydrocarbons.
Setup
1. Repair any damaged parts before using.
2. Disconnect power and allow fan to stop before opening or
servicing MR45.
3. Perform self test periodically (page 22).
4. Ensure power cord is not damaged.
5. Ensure all equipment is grounded.
6. Extension cord options:
14 AWG or thicker, up to 50 feet (15 m)
12 AWG or thicker, up to 100 feet (30 m)
7. Ensure extension cord is grounded, 3 conductor grounded.
Operational
1. Use correct refrigerant hoses with ball valve shutoffs.
2. Keep track of the current amount of refrigerant in the cylinder.
Refrigerant scales are a good way to do this.
3. Overfilling a cylinder past 80% can cause an explosion and
violates DOT laws.
4. Close cylinder off from refrigerant if it reaches 80% of its capacity.
5. Use only DOT CFR 49 or UL-approved refrigerant cylinders for the
refrigerant being recovered.
6. Use recommended accessories.
7. Use a small drier filter on the input port and change it often to
protect machine from contaminated refrigerants.
8. Monitor pressures and temperatures.
9. Self purge MR45 after each use. No refrigerant should remain in
the machine.
1110
Tech T ips
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
cap (do not seal) 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 32).
Doing so will void the warranty and damage the machine.
5.
Understand the r
efrigerant material safety data sheet (MSDS).
Self purge before recovering a different refrigerant, then connect
7.
the output port to a deeply evacuated recovery cylinder to draw
out any remaining refrigerant after the self-purge. For even more
purity, set knob to SELF PURGE and use a vacuum pump on the
output port to fully evacuate MR45.
8. Know how much refrigerant you expect to recover before
starting.
9. 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.
10. Always purge hoses before recovery. If cylinder is too hot, use an
ice bath to reduce the temperature and pressure of the cylinder.
11. If cylinder pressure is higher than expected, you can purge noncondensables into another cylinder (page 23).
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.
6. Evacuate your empty recovery cylinders to 29.6” Hg before use.
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.
1312
Controls
Backlit Digital Dual Display and Buttons
Port Routing Control Knob
Power Cord Storage
Mesh Screen Filter
Input Port
Output Port
1514
Display and Buttons
Status Icons and Messages
Input Pressure Output Pressure
Status Icons and Messages
START/STOP
Start or Stop the motor.
ZERO (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.
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
Purge or recovery has reached final recovery vacuum.
Input Closed
Cannot zero pressures. Open input port.
Output Closed
Cannot zero pressures. Open output port.
High Voltage Warning
Voltage was above 130 VAC. Motor stopped.
Low Voltage Warning
Voltage was below 95 VAC. Motor stopped.
High Pressure Cutoff
Output (cylinder) reached dangerous pressure. Motor stopped.
Low Pressure Cutoff
Input reached final recovery vacuum. Motor stopped.
Motor Fault 1
Motor temperature measured above operating range.
Motor stopped.
Motor Fault 2
Motor current (amps) rose above operating range. Motor stopped.
Motor Fault 3
Motor stopped for unknown reason.
1716
Port Routing Control
OR
OR
OR
CLOSED
• Input and Output closed.
• Set to either closed position to close
off both por
SELF PURGE
• Input closed, Output open.
• Set to this position to close the IN
port before you START the purge.
ts during setup.
OR
RECOVER
• Input and Output fully open.
• Set to this fully open position for
most of the recovery process.
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.
1918
MR45 Refrigerant Flow
Pressure
Refrigerant liquid and vapor are pulled through
the machine by the pressure difference created
by the compressor. For maximum performance,
increase the IN pressure and reduce the OUT
pressure. See Tech Tips (page 12).
Input
Sensor
Manifold
(knob control)
Compressor
Condenser
(microchannel)
Output
Pressure
Sensor
Dynamic Pressure Measurement
MR45 pressure readings are designed only
for monitoring pressures. Do not use MR45 for
diagnostic pressure measurements.
If a system’s pressure is stable, MR45 pressure
readings will be close to your other pressure
gauges.
If a system’s pressure is changing, pressure
measurements at different locations within that
system will be different. For every 3 feet of 1/4”
hose, the pressure may have a difference of
approximately ± 20 psig.
IN
Port
System
(typically)
OUT
Port
Recovery
Cylinder
(typically)
2120
Functions
MR45 Self Test
Perform this test to ensure the high pressure
cutoff and pump are operational.
Purging a Recovery Cylinder
When the cylinder pressure is higher than
expected you may have non-condensables at the
top of the cylinder. Use a second deeply evacuated
.
cylinder to pull out the non-condensables
1. Set knob to RECOVERY.
2. Open IN port to air.
3. Connect a ball valve to OUT port.
4. Close the ball valve.
5. Press START to create a pressure at the OUT port.
6. MR45 is working well if High Pressure Cutoff occurs around 550 psig
within 45 seconds. Cutoff time can increase if a hose is placed in
front of your ball valve.
Purging MR45
Purge MR45 after every recovery to pump the
last bit of refrigerant out of MR45 for longer life
1. Set knob to SELF PURGE. The IN port is now closed, and the
condenser is now set to the intake of the compressor.
2. Press START to empty MR45 and create an internal vacuum.
3. Once the final recovery vacuum (14.9”Hg) is reached, the motor
stops automatically.
1. Leave pressurized cylinder undisturbed overnight.
2. Use a vacuum pump to evacuate another cylinder.
3. Use your manifold gauges to connect the closed vapor ports of the
two cylinders.
4.
5.
6.
7.
8.
9.
e the vapor temperature of the pressurized refrigerant
Measur
cylinder.
se a P/T chart or digital manifold to find specified pressure.
U
pen the evacuated vapor port.
O
pen (purge) the pressurized vapor port until pressure is reduced to
O
5 psi above specified pressure.
alves.
Close v
ed, repeat in 15 minutes to allow the tank to settle again.
If desir
.
2322
Filter (optional)
Vapor
Cylinder
LV
Manifold
Direct Liquid/Vapor Recovery
This is the typical recovery method. Vapor and
liquid lines are routed through your manifold,
into MR45, and out to the recovery cylinder.
1. Close valves of recovery cylinder, MR45, and manifold.
2. Set up as shown in the diagram.
3. Open valves of hoses and removal tools.
4. Set MR45 to RECOVER.
5. Open high side of manifold for liquid recovery.
T
o purge air from hoses, briefly unseat hose fitting at cylinder until
6.
vapor is seen.
F
ully open vapor valve of recovery cylinder.
7.
P
8.
ress START to begin recovery.
A
djust the knob as needed to throttle refrigerant flow if liquid
9.
slugging (knocking) occurs.
W
10.
hen liquid recovery is complete, open low side of manifold for
vapor recovery.
MR45 st
11.
12.
13.
14.
ops automatically at the final recovery vacuum. Press STOP
to manually halt recovery at any time.
S
et knob to SELF PURGE and press START to empty MR45. MR45
stops automatically.
Close manifold and c
Remove hoses from MR45, set knob to RECOVER, and cap ports.
ylinder valves after self purge is complete.
Liquid
Schrader Valve Core
Removal Tools (optional)
2524
( Push/Pull Recovery
This method is only for larger systems with
at least 30 lbs of liquid refrigerant. It’s used to
recover liquid before recovering vapor.
1. Close valves of recovery cylinder and MR45.
2. Set up as shown in the diagram.
3. Open valves of liquid hose and removal tool at liquid system port.
4. To purge air from system liquid hose, briefly unseat hose fitting at
cylinder’s liquid port until vapor is seen.
5.Fully open liquid valve of recovery cylinder and allow to pressurize.
S
et MR45 to RECOVER.
6.
P
ress START to begin recovery.
7.
F
8.
ully open vapor valve of recovery cylinder.
T
o purge air from hoses briefly unseat hose fitting at vapor system
9.
port until vapor is seen.
O
10.
pen valves of vapor hose and removal tool at vapor system port.
W
hen liquid recovery is complete, press STOP to stop motor.
11.
Close all v
12.
alves and proceed to Direct Vapor Recovery (page 25).
Filter (optional)
Vapor
Cylinder
LV
Liquid
Schrader Valve Core
Removal Tools (optional)
Sight Glass (optional)
2726
Filter (optional)
Vapor
Cylinder
LV
Enhanced Direct Liquid Recovery
This method reduces the vapor pressure in the
cylinder for faster liquid recovery. Vapor recovery
is slowed however because vapor is recovered
only through the liquid port of the system.
1. Close valves of recovery cylinder.
2. Set up as shown in the diagram.
3. Open valves of hoses and removal tools.
4. Set MR45 to RECOVER.
5. To purge air from hoses, briefly unseat both hose fittings at cylinder
until vapor is seen.
6. Fully open vapor and liquid valves of recovery cylinder.
7. Press START to begin recovery.
8. Adjust the knob as needed to throttle refrigerant flow if liquid
slugging (knocking) occurs.
9. When liquid recovery is complete, close vapor valve of cylinder.
10. MR45 stops automatically at the final recovery vacuum. Press STOP
to manually halt recovery at any time.
11. Set knob to SELF PURGE and press START to empty MR45. MR45
stops automatically.
12. Close all valves after self purge is complete.
13. Remove hoses from MR45, set knob to RECOVER, and cap ports.
Liquid
Schrader Valve Core
Removal Tools (optional)
Sight Glass (optional)
2928
Troubleshooting
Status Messages
Input Closed
Cannot zero the displayed pressure because pressure sensor not
open to atmosphere. Open input port.
Output Closed
Cannot zero the displayed pressure because pressure sensor not
open to atmosphere. Open output port.
High Voltage Warning
Voltage was above 130 VAC. Motor stopped. Ensure power network
voltage is between 95 and 130 VAC @ 60 Hz.
Low Voltage Warning
Voltage was below 95 VAC. Motor stopped. Check power network to
ensure voltage is between 95 and 130 VAC @ 60 Hz.
High Pressure Cutoff
Output (cylinder) reached dangerous pressure. Motor stopped.
Ensure all valves after the output port are open. The cylinder may need
to be cooled or replaced to reduce pressure.
Low Pressure Cutoff
Input reached final recovery vacuum. Motor stopped. It’s normal
to see this after RECOVERY or SELF PURGE is complete. If unexpected,
ensure valves before the input port are open and the knob is not set to
CLOSED.
Motor Fault 1
Motor temperature measured above operating range. Motor
stopped. Extremely high ambient temperature, extended liquid
recovery time, or high cylinder pressure can be the cause. Allow
time for the motor to cool down before resuming, and throttle the
RECOVERY (page 19).
Motor Fault 2
Motor current (amps) rose above operating range. Motor stopped.
Extremely high ambient temperature, extended liquid recovery time,
or high cylinder pressure can be the cause. Allow time for the motor to
cool down before resuming, and throttle the RECOVERY (page 19).
Motor Fault 3
Motor stopped for unknown reason. If this occurs repeatedly, there
may be something wrong with MR45.
Other Symptoms
MR45 never reaches final recover vacuum.
Check for a leakage before the input port.
Liquid recovery is slower than normal.
There could be an input blockage. Check mesh screen filter for
blockage. Ensure knob is set to RECOVER.
Display does not turn on when plugged in.
Ensure power cord and outlet are okay.
Excessive noise during liquid recovery.
MR45 is experiencing a high load. Rotate the knob of MR45 to
throttle the refrigerant flow.
3130
Maintenance
1. Wipe with damp cloth to clean the exterior.
Do not use solvents
2. To extend the life of internal seals, occasionally pump a teaspoon of mineral oil through
MR45.
3. When the mesh screen filter becomes dirty
and clogged, it means it’s working to keep
your MR45 working well. You need to clean
or replace this screen often.
.
1. Loosen securing hex nut.
(Re-tighten with 1/8 wrench turn)
2. Unscrew grooved screen screw
(Re-tighten by hand)
Limited Warranty
This machine is warranted against defects in
material or workmanship for one year from date
of purchase from an authorized Fieldpiece dealer.
Fieldpiece will replace or repair the defective unit,
at its option, subject to verification of the defect.
This warranty does not apply to defects
resulting from abuse, neglect, accident,
unauthorized repair, alteration, or unreasonable
use of the machine.
An
y implied warranties arising from the sale of
a Fieldpiece product, including but not limited to
implied warranties of merchantability and fitness
for a particular purpose, are limited to the above.
Fieldpiece shall not be liable for loss of use of the
machine or other incidental or consequential
damages, expenses, or economic loss, or for any
claim of such damage, expenses, or economic
.
loss
State laws vary.
exclusions may not apply to you
The above limitations or
.
IN Port
O-ring
Screen
Hex Nut
Screen Screw
3332
MR45
© Fieldpiece Instruments, Inc 2017; v16
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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