11.4
Manifold charts
The manifold chart, where the identification letters of the
sectioning valves are highlighted, and reported as follows:
•
V = vacuum;
•
A = refrigerant recovery;
•
I = interception (HP side and LP side separation);
•
R = refrigerant recharge
•
L1 = New oil injection PAG
•
L2 = New oil injection POE
•
T1 = tracer UV dye injection 1 PAG
•
T2 = tracer UV dye injection 2 POE
The pressure sensors are highlighted, and reported as
follows:
•
TP = tank - pressure sensor
•
LP = Low Pressure - pressure sensor
•
HP = High Pressure - pressure sensor
The valves (V, A, R) which must control the gas flow in both
directions must necessarily be double since the single valve
is not able to guarantee bidirectional closure.
Notes regarding operator safety:
Attention: presence of dangerous 230 VAC voltage on the
solenoid valve terminals and near the manifold; disconnect
the equipment from the mains before each maintenance
intervention.
Attention: presence of refrigerant fluid under pressure, in
case of disassembly of manifold or its components ensure
that the tank is closed, the connection pipe between the
tank and the manifold is empty, the LP and HP connectors
are disconnected from any system and closed, that a pipe
emptying operation has been made, and the manifold has
been completely emptied.
Fig. 21: Manifold components
NOTE: on the manifold drawing above the position of the
pressure sensors is reported only with a labels and the
arrows.
PSLP
PSTP
PSHP
| AIR-NEX 9380/9480
The manifold chart, where the identification letters of the
reported as follows:
I = interception (HP side and LP side separation);
The pressure sensors are highlighted, and reported as
) which must control the gas flow in both
directions must necessarily be double since the single valve
230 VAC voltage on the
solenoid valve terminals and near the manifold; disconnect
the equipment from the mains before each maintenance
Attention: presence of refrigerant fluid under pressure, in
nts ensure
that the tank is closed, the connection pipe between the
tank and the manifold is empty, the LP and HP connectors
are disconnected from any system and closed, that a pipe
emptying operation has been made, and the manifold has
NOTE: on the manifold drawing above the position of the
and the
Fig. 22: Manifold circuit
Fig. 23: Manifold valves
Fig. 24: Manifold with pressure sensors installed.
V
A
I
V A I
T1
T1
A
V
PS
HP
PS
LP
One-way
valve
V A I
T1
A
V
PS HP
PS LP
NEX 9380/9480 | 18 en
with pressure sensors installed.
R
L1
V A I L2 R
L1
R
PS
TP
way
valve
L2
L2 R
L1
R
PS TP
T2
T2
Summary of Contents for AIR-NEX 9380
Page 1: ...MAHLE AIR NEX 9380 9480 EN Service Manual A C Service Equipment...
Page 29: ...en 29 AIR NEX 9380 9480 APPENDIX 1 REFRIGERANT FLUID CIRCUIT AIR NEX 9380 9480 H...
Page 31: ...en 31 AIR NEX 9380 9480 Recovery cycle H...
Page 32: ...AIR NEX 9380 9480 32 en Vacuum H...
Page 33: ...en 33 AIR NEX 9380 9480 Recharge H...
Page 42: ...MAHLE Aftermarket Italy S p A Via Quasimodo 4 a 43126 Par ma ITALY 2019 11 07...