Carrier 19PV550 Installation, Operation And Maintenance Instructions

Also see for 19PV550: Control manual

Carrier 19PV550 Installation, Operation And Maintenance Instructions Manual pdf 4 page image

41 - INTRODUCTIONThe 19PV units are designed to cool water for the air conditioningof buildings and industrial processes.Prior to the initial start-up of the 19PV units, the people involvedin the on-site installation, start-up, operation, and maintenance ofthis unit should be thoroughly familiar with these instructions andthe specific project data for the installation site.The 19PV liquid chillers are designed to provide a very high levelof safety during installation, start-up, operation and maintenance.They will provide safe and reliable service when operated withintheir application range.They are designed for an operating life of 15 years by assuming a75% utilisation factor; that is approximately 100,000 operating hours.This manual provides the necessary information to familiarizeyourself with the control system before performing start-upprocedures. The procedures in this manual are arranged in thesequence required for machine installation, start-up, operationand maintenance.Always ensure that all required safety measures are followed,including those in this document, such as: wearing protectiveclothing (gloves, safety glasses and shoes) using appropriate tools,employing qualified and skilled technicians (electricians,refrigeration engineers) and following local regulations.To find out, if these products comply with European directives(machine safety, low voltage, electromagnetic compatibility,equipment under pressure etc.) check the declarations ofconformity for these products.1.1 - Installation safety considerationsAccess to the unit must be reserved to authorised personnel,qualified and trained in monitoring and maintenance. The accesslimitation device must be installed by the customer (e.g. cut-off,enclosure).After the unit has been received, when it is ready to be installedor reinstalled, and before it is started up, it must be inspected fordamage. Check that the refrigerant circuit(s) is (are) intact,especially that no components or pipes have shifted (e.g. followinga shock). If in doubt, carry out a leak tightness check and verifywith the manufacturer that the circuit integrity has not beenimpaired. If damage is detected upon receipt, immediately file aclaim with the shipping company.The manufacturer strongly recommends employing aspecialised company to unload the machine.It is compulsory to wear personal protection equipment.Do not remove the skid or the packaging until the unit is inits final position. These units can be moved with a fork lifttruck, as long as the forks are positioned in the right placeand direction on the unit.The units can also be lifted with slings, using only thedesignated lifting points marked on the unit.Use slings or lifting beams with the correct capacity, and alwaysfollow the lifting instructions on the certified drawings suppliedwith the unit. Do not tilt the unit more than 15°.Safety is only guaranteed, if these instructions are carefullyfollowed. If this is not the case, there is a risk of materialdeterioration and injuries to personnel.Never cover any protection devices.This applies to the relief valves (if used) in the refrigerant orheat transfer medium circuits, the fuse plugs and the pressureswitches.Ensure that the valves are correctly installed, before operatingthe unit.Classification and controlIn accordance with the Pressure Equipment Directive andnational usage monitoring regulations in the European Unionthe protection devices for these machines are classified asfollows:Safetyaccessory(1)Damage limitationaccessory in case of anexternal fire(2)Refrigerant sideHigh-pressure switch xExternal relief valve(3) xRupture disk xFuse plug xHeat transfer fluid sideExternal relief valve (4) (4)(1) Classified for protection in normal service situations.(2) Classified for protection in abnormal service situations. These accessories aresized for fires with a thermal flow of 10kW/m². No combustible matter should beplaced within 6.5m of the unit.(3) The instantaneous over-pressure limited to 10% of the operating pressure doesnot apply to this abnormal service situation. The control pressure can be higherthan the service pressure. In this case either the design temperature or thehigh-pressure switch ensures that the service pressure is not exceeded in normalservice situations.(4) The selection of these discharge valves must be made by the personnelresponsible for completing the hydraulic installation.If the relief valves are installed on a change-over valve, thisis equipped with a relief valve on each of the two outlets. Onlyone of the two relief valves is in operation, the other one isisolated. Never leave the change-over valve in the intermediateposition, i.e. with both ways open bring the actuator inabutment, front or back according to the outlet to isolate. Ifa relief valve is removed for checking or replacement pleaseensure that there is always an active relief valve on each ofthe change-over valves installed in the unit.All factory-installed relief valves are lead-sealed to prevent anycalibration change.The external relief valves and the fuses are designed andinstalled to ensure damage limitation in case of a fire.In accordance with the regulations applied for the design, theEuropean directive on equipment under pressure and inaccordance with the national usage regulations:• These relief valves and fuses are not safety accessoriesbut damage limitation accessories in case of a fire,• The high pressure switches are the safety accessories.The relief valve must only be removed if the fire risk is fullycontrolled and after checking that this is allowed by localregulations and authorities. This is the responsibility of theoperator.When the unit is subjected to fire, safety devices preventrupture due to over-pressure by releasing refrigerant. Thefluid may then be decomposed into toxic residues whensubjected to the flame:• Stay away from the unit• Set up warnings and recommendations for personnelin charge to stop the fire.Fire extinguishers appropriate to the system and therefrigerant type must be easily accessible.The external relief valves must in principle be connectedto discharge pipes for units installed in a room. Refer tothe installation regulations, for example those of Europeanstandards EN 378 and EN 13136.They include a sizing method and examples for configurationand calculation. Under certain conditions these standardspermit connection of several valves to the same dischargepipe. Note: Like all other standards these EN standards areavailable from national standards organisations.