Carrier Aquaforce 30XA302 Installation, Operation And Maintenance Instructions

Also see for Aquaforce 30XA Series: Installation instructions Operation instructions User guide

Contents

71.4 - Repair safety considerationsAll installation parts must be maintained by the personnel incharge, in order to avoid material deterioration and injuriesto people. Faults and leaks must be repaired immediately.The authorized technician must have the responsibility torepair the fault immediately. After each repair of the unit,check the operation of the protection devices and create areport of the parameter operation at 100%.Comply with the regulations and recommendations in unitand HVAC installation safety standards, such as: EN 378,ISO 5149, etc.If a leak occurs or if the refrigerant becomes contaminated(e.g. by a short circuit in a motor) remove the completecharge using a recovery unit and store the refrigerant inmobile containers.Repair the leak detected and recharge the circuit with thetotal R-134a charge, as indicated on the unit name plate.Certain parts of the circuit can be isolated. Only chargeliquid refrigerant R-134a at the liquid line.Ensure that you are using the correct refrigerant type beforerecharging the unit. Charging any refrigerant other thanthe original charge type (R-134a) will impair machineoperation and even destroy the compressors. The compressorsoperating with this refrigerant type are lubricated with asynthetic polyolester oil.RISK OF EXPLOSION:Never use air or a gas containing oxygen during leak tests topurge lines or to pressurise a machine. Pressurised airmixtures or gases containing oxygen can be the cause of anexplosion.Only use dry nitrogen for leak tests, possibly with anappropriate tracer gas.If the recommendations above are not observed, this canhave serious or even fatal consequences and damage theinstallation.Never exceed the specified maximum operating pressures.Verify the allowable maximum high- and low-side testpressures by checking the instructions in this manual andthe pressures given on the unit name plate.Do not unweld or flamecut the refrigerant lines or anyrefrigerant circuit component until all refrigerant (liquidand vapour) as well as the oil have been removed fromchiller. Traces of vapour should be displaced with dry airnitrogen. Refrigerant in contact with an open flame producestoxic gases.The necessary protection equipment must be available,and appropriate fire extinguishers for the system and therefrigerant type used must be within easy reach.Do not siphon refrigerant.Avoid spilling liquid refrigerant on skin or splashing itinto the eyes. Use safety goggles and safety gloves. Washany spills from the skin with soap and water. If liquidrefrigerant enters the eyes, immediately and abundantlyflush the eyes with water and consult a doctor.The accidental releases of the refrigerant, due to smallleaks or significant discharges following the rupture of apipe or an unexpected release from a safety valve, cancause frostbites and burns to personnel exposed. Do notignore such injuries. Installers, owners and especiallyservice engineers for these units must:- Seek medical attention before treating such injuries.- Have access to a first-aid kit, especially for treatingeye injuries.We recommend to apply standard EN 378-3 Annex 3.Never apply an open flame or live steam to a refrigerantcontainer. Dangerous overpressure can result. If it isnecessary to heat refrigerant, use only warm water.During refrigerant removal and storage operations followapplicable regulations. These regulations, permitting condi-tioning and recovery of halogenated hydrocarbons underoptimum quality conditions for the products and optimumsafety conditions for people, property and the environmentare described in standard NF E29-795.Any refrigerant transfer and recovery operations must becarried out using a transfer unit. A 3/8” SAE connector onthe manual liquid line valve is supplied with all units forconnection to the transfer station. The units must never bemodified to add refrigerant and oil charging, removal andpurging devices. All these devices are provided with theunits. Please refer to the certified dimensional drawings forthe units.Do not re-use disposable (non-returnable) cylinders orattempt to refill them. It is dangerous and illegal. Whencylinders are empty, evacuate the remaining gas pressure,and move the cylinders to a place designated for theirrecovery. Do not incinerate them.ATTENTION: Only use refrigerant R134a, in accordancewith 700 AHRI (Air conditioning, Heating and Refrige-ration Institute). The use of any other refrigerant mayexpose users and operators to unexpected risks.Do not attempt to remove refrigerant circuit componentsor fittings, while the machine is under pressure or while itis running. Be sure pressure is at 0 kPa and that the unithas been shut-down and de-energised before removingcomponents or opening a circuit.Do not attempt to repair or recondition any safety deviceswhen corrosion or build-up of foreign material (rust, dirt,scale, etc.) is found within the valve body or mechanism.If necessary, replace the device. Do not install relief valvesin series or backwards.ATTENTION: No part of the unit must be used as a walk-way, rack or support. Periodically check and repair or ifnecessary replace any component or piping that showssigns of damage.