Fieldpiece MR45 - Certifications; UL Verified Performance Data

2120
MR45 Refrigerant Flow
Refrigerant liquid and vapor are pulled through
the machine by the pressure dierence created
by the compressor. For maximum performance,
increase the IN pressure and reduce the OUT
pressure. See Tech Tips (page 12).
Compressor
Input
Pressure
Sensor
Output
Pressure
Sensor
OUT
Port
IN
Port
Recovery
Cylinder
(typically)
System
(typically)
Manifold
(knob control)
Condenser
(microchannel)
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 dierent locations within that
system will be dierent. For every 3 feet of 1/4”
hose, the pressure may have a difference of
approximately ± 20 psig (± 150 kPa).