MAHLE RTI Matco AC2880 - Manual (Page 4)

Page 2
INTRODUCTION TO THE AC2880
The AC2880 is a complete dual refrigerant management center featuring state-of-the-art electronic
control with digital weight scale measuring of refrigerant. Operation of the AC2880 is intuitive and very
easy to master. Operational functions of the AC2880 can be performed individually or in an automatic
sequence.
This Operation Manual first describes each of the functions and then gives an overview of combining the
functions into an automatic sequence. Some functions have options where the controller display will
prompt the technician for input during the setup programming.
Following is an overview of the operation and features of the AC2880:
FILL CHARGE CYLINDER
Liquid recycled or new refrigerant is quickly transferred from a cylinder on the rear of the AC2880 to
the internal charge cylinder. Following the first setup filling or a calibration procedure, 1.1 lbs. more
refrigerant than displayed is used due to priming of internal components.
RECYCLE
Refrigerant is recovered from the A/C, impurities (particulates, oil, moisture and air) are removed and
the refrigerant is stored in the internal charge cylinder. The recovery process stops when the AC2880
senses an 8 InHg vacuum at the A/C. A programmable wait time (minimum of two minutes) then
starts. If pressure in the A/C rises during this time period due to vaporization of residual liquid
refrigerant, the AC2880 will restart to recover this refrigerant. When the AC2880 stays off continually
for the full wait time, the recovery procedure is complete.
DEEP VACUUM
The length of time for the deep vacuum procedure is programmable. The time remaining is displayed
during the deep vacuum procedure. An optional vacuum leak test and add oil function are available
during the programming of the deep vacuum procedure. The technician is prompted for a Yes/No
response to each. The vacuum leak test starts after the vacuum process is completed. The amount
of time the vacuum is held is displayed so the technician can monitor the pressure for any increase
due to a leak in the A/C. The add oil process prompts the technician to add oil after the vacuum
and/or vacuum leak test procedure.
PURGE AIR - DRAIN OIL
Excess air and recovered oil must be removed from the AC2880 after all refrigerant has been
recovered from the A/C. Temperature and pressure readings are examined and air is released using
the purge switch. Oil is drained into the oil drain bottle for measuring to determine the need to
replenish the A/C.
STORED DATA
The AC2880 monitors filter life and will prompt the technician when filters need to be replaced.
Recycled and charged refrigerant amounts are recorded and totaled during each A/C service
procedure. These totals can be monitored to manage refrigerant usage. Refrigerant transferred
directly into the charge cylinder from the fill port is not added to the total recycled refrigerant.
OVER CHARGE AMOUNT
A one ounce over charge is added during each charge procedure to compensate for refrigerant loss
in the service hoses. This can be programmed to accommodate different operating conditions.