Checking Direction Of Rotation Of Motor Shaft; Installing The Drive Guards (If Present); Initial Oil Warm Up; Initial Start-Up - GEA Grasso 5 Installation And Maintenance Instructions Manual

1.4.6

Checking direction of rotation of motor shaft

Prior to installing the intermediate coupling element or V-belts, the direction of
rotation of the motor shaft must be checked. The direction of rotation can be
determined from the arrow-sticker at the oil pump.
1.4.7

Installing the drive guards (if present)

Only after the compressor is ready for the initial startup! Refer to the drive guard
installing procedures included in the order documentation.
1.4.8

Initial oil warm up

Prior to the initial start-up, the crankcase heater (if present) must be energised.
For the min. oil temperature refer to "Product Information (PI)".
1.4.9

Initial start-up

1.4.9.1 Limitations of part load operation and start-up

The capacity control serves to adapt the compressor capacity at any moment as
closely as possible to the refrigerating capacity. In order to adjust the capacity, a
number of cylinders can be put in or out of action either individually or collectively
by means of solenoid valves.
For a detailed description about start-up and part load limitations refer to GEA
Grasso Selection Software.

1.4.9.2 WIRING LOGIC NORMALLY OPEN UNLOADED START SOLENOID

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Warning!
Due to start-up limitations and to limitations of part load operation it
may be that not all available part load steps are allowed under certain
conditions. Use of incorrect control steps can damage compressor
and/or components.
If compessor is NOT running then NO-solenoid is not energised.
Energise the NO-solenoid 10 - 20 seconds before starting.
If compressor starts then NO-solenoid is energised and de-energised by
means of an auxiliary time relay.
Ensure that the NO-solenoid valve is not de-energised until the minimum
allowed compressor speed has been achieved and the specified lubrication oil
pressure has been established.
Energise the NO-solenoid 5 seconds before stopping until the compressor is
stopped completely.
INSTALLATION AND PREPARATION FOR USE
PREPARATIONS FOR USE
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