Carrier Aquasnap 30RW Installation, Operation And Maintenance Instructions

Contents

Carrier Aquasnap 30RW Installation, Operation And Maintenance Instructions Manual pdf 6 page image

61.4 - 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 polluted (e.g.by a short circuit in a motor) remove the complete chargeusing a recovery unit and store the refrigerant in mobilecontainers.Repair the leak detected and recharge the circuit with thetotal R-407C charge, as indicated on the unit name plate.Do not top up the refrigerant charge. Only charge liquidrefrigerant R-407C at the liquid line.Ensure that you are using the correct refrigerant type beforerecharging the unit.Charging any refrigerant other than the original chargetype (R-407C) will impair machine operation and can evendestroy the compressors. The compressors operating withthis refrigerant type are lubricated with a synthetic polyol-ester oil.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. Oxygen reacts violently with oil and grease.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 drynitrogen. Refrigerant in contact with an open flameproduces toxic 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.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.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. If the refrigerant circuitis open to carry out a repair, all circuit openings must beplugged, if the repair takes longer than 30 minutes. Thisprevents humidity from contaminating the circuit, especiallythe oil. If the work is expected to take longer, charge thecircuit with nitrogen.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 safety valvesin series or backwards.ATTENTION: No part of the unit must be used as awalkway, rack or support. The refrigerant lines can breakunder the weight and release refrigerant, causing personalinjury.Do not climb on a machine. Use a platform, or staging towork at higher levels.Use mechanical lifting equipment (crane, hoist, winch,etc.) to lift or move heavy components. For lightercomponents, use lifting equipment when there is a risk ofslipping or losing your balance.