Carrier 61WG 020 Installation, Operation And Maintenance Instructions

Contents

51 - INTRODUCTIONPrior to the initial start-up of the 61WG/30WG/30WGAunits, the people involved in the on-site installation, start-up,operation and maintenance of this unit should be thoroughlyfamiliar with these instructions and the specific project datafor the installation site.The 61WG/30WG/30WGA units are designed to provide avery high level of safety during installation, start-up,operation and maintenance. They will provide safe andreliable service when operated within their application range.They are designed for an operating life of 15 years byassuming a 75% utilisation factor; that is approximately100,000 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 inthe sequence required for machine installation, start-up,operation and 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 considerationsAfter the unit has been received, when it is ready to beinstalled or reinstalled, and before it is started up, it must beinspected for damage. Check that the refrigerant circuit(s)is (are) intact, especially that no components or pipes haveshifted (e.g. following a shock). If in doubt, carry out a leaktightness check and verify with the manufacturer that thecircuit integrity has not been impaired. If damage is detectedupon receipt, immediately file a claim with the shippingcompany.Do 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.These units are not designed to be lifted from above. Useslings with the correct capacity, and always follow the liftinginstructions on the certified drawings supplied with the unit.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.DO NOT COVER ANY PROTECTION DEVICES.30WGA are supplied without safety valve on the high-pressurerefrigerant circuit and are equipped with automa-tically resetpressure switches in accordance with EN378.For unit installation and connection to the remote condenserit is necessary to:• Check the applicable air conditioning regulations andsafety standards (e.g. PED and EN378 for the EuropeanUnion)• Determine which accessories (safety valves, fuses etc.)are required so that these circuits comply with theapplicable regulations and standards.If shut-off valves are used on the circuit, ensure that thesevalves do not shut off the safety valve for the different containersthat they protect.The protection devices include the fuse plugs and safety valves(if used) in the refrigerant or heat transfer medium circuits.Check if the original protection plugs are still present at thevalve outlets. These plugs are generally made of plastic andshould not be used. If they are still present, please removethem. Install devices at the valve outlets or drain piping thatprevent the penetration of foreign bodies (dust, building debris,etc.) and atmospheric agents (water can form rust or ice).These devices, as well as the drain piping, must not impairoperation and not lead to a pressure drop that is higher than10% 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 are classifiedasfollows: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 risk isunder control for a particular installation. There is noguarantee that the accessories are re-installed if the installationis changed or for transport with a gas charge.