Carrier Aquasnap 30RW Installation, Operation And Maintenance Instructions

Contents

Carrier Aquasnap 30RW Installation, Operation And Maintenance Instructions Manual pdf 37 page image

3714.11 - Variable-speed hot water loop pump(condenser side)This pump is factory-installed as standard. It is a variable-speed pump with available system pressure. See the pumpflow/pressure curve.The system flow rate is automatically adjusted via thefrequency converter built into the pump, based on the heatrejection load on the drycooler.The maximum permitted concentration of the glycoladditives is 35%.The maximum pump suction pressure is limited to 4 bar dueto the valve installed on the entering water piping.14.12 - Evaporator and condenser pump suction filterAll evaporator and condenser pumps are protected by asuction filter. This is easily removable to recover solidpar-ticles, as it is fixed between two Victaulic couplings. Itpro-tects the plate heat exchanger pump against solidparticles with a size exceeding 1,2 mm. Before the unitstart-up it is important to turn the evaporator andcondenser pump to decontaminate the water loops of anysolid pollution.A specific pump start-up function in the Quick Test menuis available for this task.15 - MAINTENANCEDuring the unit operating life the service checks and testsmust be carried out in accordance with applicable nationalregulations.If there are no similar criteria in local regulations, theinformation on checks during operation in annex C ofstandard EN 378-2 can be used.External visual checks: annex A and B of standard EN378-2.Corrosion checks: annex D of standard EN 378-2. Thesecontrols must be carried out:• After an intervention that is likely to affect theresis-tance or a change in use or change of high-pressure refrigerant, or after a shut down of more thantwo years. Components that do not comply, must bechanged. Test pressures above the respectivecomponent design pressure must not be applied(annex B and D).• After repair or significant modifications or significantsystem or component extension (annex B).• After re-installation at another site (annexes A, B and D).• After repair following a refrigerant leak (annex D).The frequency of refrigerant leak detection can varyfrom once per year for systems with less than 1% leakrate per year to once a day for systems with a leakrate of 35% per year or more. The frequency is inproportion with the leak rate.NOTE: high leak rates are not acceptable. The necessarysteps must be taken to eliminate any leak detected.NOTE 2: Fixed refrigerant detectors are not leak detectors,as they cannot locate the leak.15.1 - Soldering and weldingComponent, piping and connection soldering and weldingoperations must be carried out using the correct proceduresand by qualified operators. Pressurised containers must notbe subjected to shocks, nor to large temperature variationsduring maintenance and repair operations.Any technician attending the machine for any purpose mustbe fully qualified to work on refrigerant and electricalcircuits.WARNINg: Before doing any work on the machine ensurethat the power is switched off. If a refrigerant circuit isopened, it must be evacuated, recharged and tested forleaks. Before any operation on a refrigerant circuit, it isnecessary to remove the complete refrigerant charge fromthe unit with a refrigerant charge recovery unit.All removal and refrigerant draining operations must becarried out by a qualified technician and with the correctmaterial for the unit. Any inappropriate handling canlead to uncontrolled fluid or pressure leaks.If an oil draining or recovery operation becomes necessary,the fluid transfer must be made using mobile containers.