ENGLISH 59 / 78 CAP. 11 - REFRIGERANT FLUID CIRCUIT
11.4 MANIFOLD CHART
The manifold chart, where the identification letters of the sectioning valves are highlighted, is
reported as follows:
• V = vacuum;
• A = 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 (for further details see CHAP.14)
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