TM 9-4120-411-14
5.3
SERVICE MANIFOLD INSTALLATION - CONTINUED.
(1) Check that all four service manifold valves are closed.
(2) Disconnect service manifold pressure gage hose from discharge service valve and compound gage hose
from suction service valve.
(3) Open service manifold charge valve. Operate recovery unit and allow refrigerant to purge from hoses.
(4) Close service manifold valves.
(5) Shut down recovery unit.
(6) Disconnect service manifold cha rge hose from recovery unit.
(7) Install two protective caps.
(8) Close and secure cover.
5.4
REMOVAL AND RECOVERY OF THE SYSTEM REFRIGERANT.
THIS TASK COVERS: a. Removal/Recovery
CAUTION
Follow instructions for specific refrigerant recovery unit being used to avoid
compressor oil loss. Loss of oil could result in compressor damage.
NOTE
Venting tetrafluoroethane refrigerant (R- 134a) into the atmosphere rather than
recovering it is subject to EPA restrictions. Venting the refrigerant maybe a
violation of public law and subject to severe penalties.
(2) Open service manifold pressure and compound gage valves.
(3) Open service manifold charge valve. Operate recovery unit until all refrigerant has been removed from
system.
(4) Close service manifold valves.
(5) Shut-down refrigerant recovery unit.
5-6