MAHLE ACX150, Service Manual

Page: 26 / 202

EN | 25 | ACX150/250 | Refrigerant fluid circuit
© MAHLE
The assistance centre is responsible for
workmanlike assembly and for checking
before new commissioning according to
the prescriptions provided for by the
regulations in force in the country of use;
in particular, the assistance centre will
have to guarantee that the assembly will
ensure a perfect tightness and that the
safety components are installed
appropriately so as to ensure operation is
not jeopardized.
For ACX150
(refrigerant R134a and R1234yf)
VESSEL 20l
Category III (Dir. 97/23/EC)
SAFETY VALVE PS 20 bar
Category IV (Dir. 97/23/EC)
For ACX250 (refrigerant R1234yf)
VESSEL 20l
Category III (Dir. 97/23/EC)
SAFETY VALVE PS 20 bar
Category IV (Dir. 97/23/EC)
10.4 Manifold chart
The manifold chart, where the
identification letters of the sectioning
valves are highlighted, is reported as
follows:

V = vacuum;

A = refrigerant recovery;

I = interception (HP side and LP
side separation);

L = new oil

T = tracer

R = refrigerant
The valves (V,A,I) 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.
V A I
R
L T