If an oil rectifier system is applied in the re-
frigeration system, the oil return line
must be connected to the oil return con-
nection.
Never connect the oil rectifier return line to
the suction line or to the suction gas filter.
DO NOT ground through the compressor
when arc welding
Suspension of system pipework
To eliminate vibration transmission to the system
piping, the following is recommended:
• Install all piping free of tension.
• Secure the piping by clips or suspenders in two
directions.
• Install (stop) valves, piping and accessories such,
that there is no load exerted on the compressor.
A1.6 Connecting the power supply
Before leaving the factory the compressor
package is completely wired*. The connection to
be made by the installer is between main power
source and the Monitron CR (if ordered).
Information about further electrical connections
to be made (e.g. crankcase heater, drive motor
starting equipment, thermal protection of drive
motor, automatic start/ stop, motor current
transducer and other external electrical devices)
can be found in the order manual.
*
If the standard recommended Monitron CR is applied.
A1.7 Earthing connections
Grasso compressors and packages are equipped
with litz-wires and earth connecting points.
To avoid leakage current flowing through the
components, disconnect all litz-wires when arc-
welding. After all installation functions are
completed, reconnect the litz-wires and ground
the package to earth.
A1.8 Separately delivered components
Mount the separately delivered set-components
e.g. oil charge and drain valve, according to the
instruction enclosed in each individual set.
Refrigeration Division
Grasso
A: INSTALLATION AND PREPARATION FOR USE
A1.6 Installation and Maintenance Manual RC(U)6 v001.99.01.en
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