GEA Grasso V Series Installation And Maintenance Instructions Manual

1.3.6 Checking direction of rotation of motor shaftPrior to installing the intermediate coupling element or V-belts, the direction ofrotation of the motor shaft must be checked. The direction of rotation can bedetermined from the arrow-sticker at the oil pump.1.3.7 Installing the drive guards (if present)Only after the compressor is ready for the initial startup! Refer to the drive guardinstalling procedures included in the order documentation.1.3.8 Initial oil warm upPrior to the initial start-up, the crankcase heater (if present) must be energised.For the min. oil temperature refer to “Product Information (PI)“.1.3.9 Initial start-up1.3.9.1 Limitations of part load operation and start-upThe capacity control serves to adapt the compressor capacity at any moment asclosely as possible to the refrigerating capacity. In order to adjust the capacity, anumber of cylinders can be put in or out of action either individually or collectivelyby means of solenoid valves.Warning!Due to start-up limitations and to limitations of part load operation itmay be that not all available part load steps are allowed under certainconditions. Use of incorrect control steps can damage compressorand/or components.For a detailed description about start-up and part load limitations refer to GEAGrasso Selection Software.1.3.9.2 WIRING LOGIC NORMALLY OPEN UNLOADED START SOLENOID1. If compessor is NOT running then NO-solenoid is not energised.2. Energise the NO-solenoid 10 - 20 seconds before starting.3. If compressor starts then NO-solenoid is energised and de-energised bymeans of an auxiliary time relay.4. Ensure that the NO-solenoid valve is not de-energised until the minimumallowed compressor speed has been achieved and the specified lubrication oilpressure has been established.5. Energise the NO-solenoid 5 seconds before stopping until the compressor isstopped completely.INSTALLATION AND PREPARATION FOR USEPREPARATIONS FOR USE0089288gbr_1130.10.2017 27