Carrier 30HXC Installation, Operation And Maintenance Instructions

Also see for 30HXC Series: Installation, operation and maintenance instructions Installation, operation and maintenance instructions

Contents

Carrier 30HXC Installation, Operation And Maintenance Instructions Manual pdf 4 page image

41 - INTRODUCTIONPrior to the initial start-up of the 30HXC 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 30HXC liquid chillers are designed to provide a very highlevel of safety during installation, start-up, opera tion andmaintenance. They will provide safe and reliable service whenoperated within their application range.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.Be sure you understand and follow the procedures and safetyprecautions contained in the instructions supplied with themachine, as well as those listed in this guide.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.Carrier strongly recommends employing a specialised companyto unload the machine.It is compulsory to wear personal protection equipment.Do not remove the skid or the packaging until the unit is in itsfinal position. These units can be moved with a fork lift truck,as long as the forks are positioned in the right place and directionon the unit.The units can also be lifted with slings, using only the designatedlifting 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 as follows:Safetyaccessory*Damage limitation accessory**in case of an external fireRefrigerant sideHigh-pressure switch xExternal relief valve*** xRupture disk xFuse plug xHeat transfer fluid sideExternal relief valve **** ***** Classified for protection in normal service situations.** Classified for protection in abnormal service situations.*** The instantaneous over-pressure limited to 10% of the operating pressuredoes not apply to this abnormal service situation. The control pressure can behigher than the service pressure. In this case either the design temperature orthe high-pressure switch ensures that the service pressure is not exceeded innormal service situations.**** The classification of these relief valves must be made by the personnel thatcompletes the whole hydronic installation.If the relief valves are installed on a change-over valve, this isequipped with a relief valve on each of the two outlets. Only oneof the two relief valves is in operation, the other one is isolated.Never leave the change-over valve in the intermediate position,i.e. with both ways open (bring the actuator in abutment, frontor back according to the outlet to isolate). If a relief valve isremoved for checking or replacement please ensure that thereis always an active relief valve on each of the change-over valvesinstalled in the unit.All factory-installed relief valves are lead-sealed to prevent anycalibration change.The external relief valves and the fuses are designed and installedto 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 accessories butdamage 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 local regulationsand authorities. This is the responsibility of the operator.