Carrier 30RQ 039 Series Installation, Operation And Maintenance Instructions

Contents

5Do not remove the skid or the packaging until the unit isin its final position. These units can be moved with a forklift truck, as long as the forks are positioned in the rightplace and direction on the unit.The units can also be lifted with slings, using only thedesignated lifting points marked on the unit (labels onthe chassis and a label with all unit handling instructionsare attached to the unit).Use slings with the correct capacity, and always followthe lifting instructions on the certified drawings suppliedfor the unit.Safety is only guaranteed, if these instructions arecarefully followed. If this is not the case, there is a risk ofmaterial deterioration and injuries to personnel.DO NOT COVER ANY PROTECTION DEVICES.This applies to fuse plugs and safety valves (if used) in therefrigerant or heat transfer medium circuits. Check if theoriginal protection plugs are still present at the valve outlets.These plugs are generally made of plastic and should not beused. If they are still present, please remove them. Installdevices at the valve outlets or drain piping that prevent thepenetration of foreign bodies (dust, building debris, etc.) andatmospheric agents (water can form rust or ice). Thesedevices, as well as the drain piping, must not impairoperation and not lead to a pressure drop that is higherthan 10% of the control pressure.Classification and controlIn accordance with the Pressure Equipment Directive andnational usage monitoring regulations in the EuropeanUnion the protection devices for these machines areclassified 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**** x x* 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 safety valves must be made by the personnel thatcompletes the whole hydronic installation.Do not remove these valves and fuses, even if the fire riskis under control for a particular installation. There is noguarantee that the accessories are re-installed if the instal-lation is changed or for transport with a gas charge.All factory-installed safety valves are lead-sealed toprevent any calibration change.The external safety valves must always be connected todrain pipes for units installed in a closed room (30RQSY).Refer to the installation regulations, for example those ofEuropean standard EN 378 and EN 13136.These pipes must be installed in a way that ensures thatpeople and property are not exposed to refrigerant leaks.As the fluids can be diffused in the air, ensure that the outletis far away from any building air intake, or that they aredischarged in a quantity that is appropriate for a suitablyabsorbing environment.Safety valves must be checked periodically. See paragraph“Repair safety considerations”.If the safety valves are installed on a reversing valve(changeover), this is equipped with a safety valve on eachof the two outlets. Only one of the two safety valves is inoperation, the other one is isolated. Never leave the reversingvalve in the intermediate position, i.e. with both ways open(locate the control element in the stop position). If a safetyvalve is removed for checking or replacement please ensurethat there is always an active safety valve on each of thereversing valves installed in the unit.Provide a drain in the discharge circuit, close to each safetyvalve, to avoid an accumulation of condensate or rain water.All precautions concerning handling of refrigerant mustbe observed in accordance with local regulations.Accumulation of refrigerant in an enclosed space candisplace oxygen and cause asphyxiation or explosions.Inhalation of high concentrations of vapour is harmful andmay cause heart irregularities, unconsciousness, or death.Vapour is heavier than air and reduces the amount of oxygenavailable for breathing. These products cause eye and skinirritation. Decomposition products can be hazardous.1.4 - Equipment and components under pressureThese products incorporate equipment or components underpressure, manufactured by Carrier or other manufacturers.We recommend that you consult your appropriate nationaltrade association or the owner of the equipment or compo-nents under pressure (declaration, re-qualification, retesting,etc.). The characteristics of this equipment/these componentsare given on the nameplate or in the required documentation,supplied with the products.Do not introduce high static and dynamic pressure comparedwith the existing operating pressures - either service or testpressures - in the refrigerant circuit or in the heat transfercircuit, especially:• limiting the elevation of the condensers or evaporators• taking the circulating pumps into consideration.