Carrier 30RBM 160 Installation, Operation And Maintenance Instructions

Also see for 30RBM 160: Installation, operation and maintenance instructions

Contents

Carrier 30RBM 160 Installation, Operation And Maintenance Instructions Manual pdf 8 page image

8After disconnecting the power supply to the electrical box,wait for 5 minutes before accessing the electrical box orvariable drives.Before any intervention, verify that there is no voltage presentat any accessible conducting parts of the power circuit.Ensure regularly that the vibration levels remain acceptableand close to those at the initial unit start-up.Before opening a refrigerating circuit, purge and read thepressure indicators.If the refrigerant circuit remains open after an intervention(such as a component replacement, etc.):• Seal the openings if the duration is less than a day• Beyond this time, charge the circuit with a dry, inert gas(nitrogen).The objective is to prevent penetration of atmospherichumidity and the resulting corrosion of the unprotectedinternal steel walls.1.5 - Repair safety considerationsTo prevent any damage or accidents, trained personnel mustservice the various parts of this unit and must resolve anymalfunctions or leaks immediately.Comply with the regulations and recommendations given inthe safety standards for refrigerating systems and machines,such as: EN 378, ISO 5149, etc.Risk of explosion:Never use air or gases containing oxygen during leak tests, topurge ducts or to pressurise a unit. Pressurised air mixtures orgases containing oxygen can be the cause of an explosion.Oxygen reacts violently with oil and grease.Only use dry nitrogen for leak tests, possibly with anappropriate tracer gas.If the recommendations above are not observed, this can haveserious or even fatal consequences and damage the installation.Never exceed the specified maximum operating pressures.Verify the maximum permissible high and low test pressuresby checking the instructions in this manual or the pressuresgiven on the unit name plate.The necessary protection equipment must be available, andappropriate fire extinguishers for the system and therefrigerant type used must be within easy reach.Do not attempt to remove components fitted to the refrigerantcircuit or fittings while the unit is under pressure or while it isrunning. Make sure the circuit pressure is zero and that theunit has been shut down and de-energised before removingcomponents or opening a circuit. When the refrigerant circuitis opened to repair, see the blanketing recommendations inthe "Maintenance safety considerations" paragraph.No part of the unit must be used as a walkway, rack or support.Periodically check and repair or, if necessary, replace anycomponent or piping that shows signs of damage.The refrigerant lines can break under the weight and releaserefrigerant, causing personal injury.Do not climb on a unit. Use a platform, or staging to work athigher levels.Use mechanical lifting equipment (crane, hoist, winch, etc.) tolift or move heavy components.For lighter components, use lifting equipment if there is anyrisk of slipping or losing your balance.Use only original spare parts for any repair or componentreplacement. Consult the list of spare parts that correspondsto the original equipment.Do not drain treated and/or added fluid from the heat-transfercircuit (e.g. antifreeze) without informing the site technical/service department or other competent body first.Close the shut-off valves on the water inlet and outlet anddrain the unit's hydraulic circuit before working on thecomponents installed on the circuit (screen filter, pump, waterflow sensor, etc.).Periodically inspect all valves, couplings and pipes on therefrigerating and hydraulic circuits to ensure that they do notshow any signs of corrosion or leaks.