Carrier Aquasnap 30RW Installation, Operation And Maintenance Instructions

Contents

Carrier Aquasnap 30RW Installation, Operation And Maintenance Instructions Manual pdf 40 page image

40ATTENTION: The compressor and piping surface tempe-ratures can in certain cases exceed 100°C and cause burns.Particular caution is required during maintenanceopera-tions. At the same time, when the compressor is inoperation, the surface temperatures can also be very cold(down to -15°C for units with a low leaving watertemperature), and can cause frost burns.15.11 - Evaporator and condenser maintenanceThere is no particular maintenance necessary on the plateheat exchanger. Check:• that the insulating foam has not become detached ordamaged during work on the units,• that the entering and leaving water temperaturesensors are well connected• the cleanliness on the water heat exchanger side (nosigns of leaks).• that the periodic inspections required by local regu-lations have been carried out.15.12 - Corrosion checkAll metallic parts of the unit (chassis, casing panels, controlboxes, heat exchangers etc.) are protected against corrosionby a coating of powder or liquid paint. To prevent the riskof blistering corrosion that can appear when moisturepenetrates under the protective coatings, it is necessary tocarry out periodic checks of the coating (paint) condition.Characteristics of R-407Cbar(relative)Saturated bubblepoint temp., °CSaturated dewpoint temp., °Cbar(relative)Saturated bubblepoint temp., °CSaturated dewpoint temp., °Cbar(relative)Saturated bubblepoint temp., °CSaturated dewpoint temp., °C1 -28,55 -21,72 10,5 23,74 29,35 20 47,81 52,551,25 -25,66 -18,88 10,75 24,54 30,12 20,25 48,32 53,041,5 -23,01 -16,29 11 25,32 30,87 20,5 48,83 53,531,75 -20,57 -13,88 11,25 26,09 31,62 20,75 49,34 54,012 -18,28 -11,65 11,5 26,85 32,35 21 49,84 54,492,25 -16,14 -9,55 11,75 27,6 33,08 21,25 50,34 54,962,5 -14,12 -7,57 12 28,34 33,79 21,5 50,83 55,432,75 -12,21 -5,7 12,25 29,06 34,5 21,75 51,32 55,93 -10,4 -3,93 12,5 29,78 35,19 22 51,8 56,363,25 -8,67 -2,23 12,75 30,49 35,87 22,25 52,28 56,823,5 -7,01 -0,61 13 31,18 36,55 22,5 52,76 57,283,75 -5,43 0,93 13,25 31,87 37,21 22,75 53,24 57,734 -3,9 2,42 13,5 32,55 37,87 23 53,71 58,184,25 -2,44 3,85 13,75 33,22 38,51 23,25 54,17 58,624,5 -1,02 5,23 14 33,89 39,16 23,5 54,64 59,074,75 0,34 6,57 14,25 34,54 39,79 23,75 55,1 59,55 1,66 7,86 14,5 35,19 40,41 24 55,55 59,945,25 2,94 9,11 14,75 35,83 41,03 24,25 56,01 60,375,5 4,19 10,33 15 36,46 41,64 24,5 56,46 60,85,75 5,4 11,5 15,25 37,08 42,24 24,75 56,9 61,226 6,57 12,65 15,5 37,7 42,84 25 57,35 61,656,25 7,71 13,76 15,75 38,31 43,42 25,25 57,79 62,076,5 8,83 14,85 16 38,92 44,01 25,5 58,23 62,486,75 9,92 15,91 16,25 39,52 44,58 25,75 58,66 62,97 10,98 16,94 16,5 40,11 45,15 26 59,09 63,317,25 12,02 17,95 16,75 40,69 45,71 26,25 59,52 63,717,5 13,03 18,94 17 41,27 46,27 26,5 59,95 64,127,75 14,02 19,9 17,25 41,85 46,82 26,75 60,37 64,528 14,99 20,85 17,5 42,41 47,37 27 60,79 64,928,25 15,94 21,77 17,75 42,98 47,91 27,25 61,21 65,318,5 16,88 22,68 18 43,53 48,44 27,5 61,63 65,718,75 17,79 23,57 18,25 44,09 48,97 27,75 62,04 66,19 18,69 24,44 18,5 44,63 49,5 28 62,45 66,499,25 19,57 25,29 18,75 45,17 50,02 28,25 62,86 66,879,5 20,43 26,13 19 45,71 50,53 28,5 63,27 67,269,75 21,28 26,96 19,25 46,24 51,04 28,75 63,67 67,6410 22,12 27,77 19,5 46,77 51,55 29 64,07 68,0210,25 22,94 28,56 19,75 47,29 52,05 29,25 64,47 68,3915.10 - CompressorsThe compressors do not require any specific maintenance.Nevertheless the preventive system maintenance operationsprevent specific compressor problems. The following periodicpreventive maintenance checks are strongly recommended:• Check the operating conditions (evaporating tempera-ture, condensing temperature, discharge temperature,heat exchanger temperature difference, superheat,subcooling). These operating parameters must alwaysbe within the compressor operating range.• Check that the safety devices are all operational andcorrectly controlled.• Check oil level and quality. If there is a colour change inthe sight glass, check the oil quality. This may include anacidity test, moisture control, a spectrometric analysis etc.• Check the leak tightness of the refrigerant circuit.• Check the compressor motor power input, as well asthe voltage imbalance between phases.• Check the tightening of all electrical connections.• Ensure that the compressor is clean and runs correctly;verify that there is no rust on the compressor shell andno corrosion or oxydation at the electrical connectionsand the piping.