Carrier AquaForce B Series Controls, Start-up, Operation, Service And Troubleshooting Instructions

Also see for AquaForce 30XV140: Controls, start-up, operation, service and troubleshooting instructions

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Carrier AquaForce B Series Controls, Start-up, Operation, Service And Troubleshooting Instructions Manual pdf 68 page image

687. Install the bolts, and thread a nut finger-tight onto each bolt.For couplings supplied with stainless steel hardware, applyan anti-seize compound to the bolt threads. Make sure theoval neck of each bolt seats properly in the bolt hole.8. Tighten the nuts evenly by alternating sides until metal-to-metal contact occurs at the bolt pads. Make sure the hous-ings’ keys engage the grooves completely. It is important totighten the nuts evenly to prevent gasket pinching.9. Visually inspect the bolt pads at each joint to ensure metal-to-metal contact is achieved.COMPRESSOR OIL SYSTEMEach compressor/circuit has its own oil system which includes anoil filter, oil solenoid, check valve, oil level switch, oil separatorheater, oil pressure transducer, and an oil shut-off valve. A typicaloil system is shown in Fig. 63 and 64. See Table 42 for required oilquantity per circuit, initially included from the factory.Table 42 — Unit Oil QuantitiesOil ChargeWhen additional oil or a complete charge is required it mustmeet the following specifications:• . .Manufacturer . . . . . . . . . Emkarate RL220XL• Oil Type . . . . . . . . . . . . . Inhibited polyolester-based syn-thetic compressor lubricant foruse with screw compressors.• ISO Viscosity Grade . . . 220Do not reuse drained oil or any oil that has been exposed to theatmosphere.Oil is available in the following quantities from your localCarrier representative:If unsure if there is low oil charge in the system, follow thesteps below:1. If the unit shuts off repeatedly from a low oil level alert, itmay be an indication of inadequate oil charge: however, itcould also indicate the oil is not being reclaimed from thelow-side of the system.2. Run the circuit at full load for 11/2 hours.NOTE: An adequate load must be available.3. After running the unit for 11/2 hours at full load, stop the unit.Check the oil level in the oil separator sight glass. An oil lev-el should be visible in the upper sight glass. If level is notvisible, the unit is low on oil charge.4. Add oil until the oil is at the center of the upper sight glass.Make sure not to add oil beyond this level as excess oil willbe carried out of the oil separator into the system and mightlead to system instabilities at certain conditions.5. The factory oil charging stations are programed to add pre-cise amount of oil to the oil separator and if the oil levelwhile inspection shows higher than middle of the top sightglass then it could be due to refrigerant mixed in it. Do notremove any oil.Add oil to the oil separator using the 1/4-in. access fitting onthe side of the separator.NOTE: To facilitate the oil charging process, ensure thatthe unit is not running when adding oil. The system is un-der pressure even when the unit is not running, so it is nec-essary to use a suitable pump to add oil to the system. Us-ing a suitable pump, add 1/2 gal (1.9 L) of oil to the system.Continue adding oil in 1/2 gal (1.9 L) increments until theproblem is resolved, up to a maximum of 1.5 gal (5.7 L).6. Larger units (350 Circuit A and 400-500 ton units) will nothave sight glasses for reference. The same procedure shouldbe followed. To check for oil in the evaporator, determine theapproach, LWT - SST. This should be less than 10°F forfresh water for a circuit running in steady state condition atfull load. If over this amount, there is still oil logged in theevaporator. Continue to run at full load to remove it. If theapproach is low (less than 6) and there are low oil levelalarms, add 0.5 gal. to the circuit.Oil Filter MaintenanceEach circuit has one oil filter bolted externally to the compres-sor. Oil line pressure drop is monitored by the control. Oil linepressure drop is calculated by subtracting oil pressure (OPT)from discharge pressure (DPT). If the oil line pressure drop ex-ceeds 30 psig (206.8 kPa) for 5 minutes the control will gener-ate a High Oil Filter Pressure Drop alert. The High Oil FilterPressure Drop alert will not shut down the compressor, but in-stead indicates that the oil filter is dirty. If oil pressure linelosses exceed 50 psig (344.7 kPa) for more than 30 secondsthen the control will shut down the circuit on Maximum OilFilter Differential Pressure Failure.Replacing the Oil FilterClose the oil service valves on either side of filter by removingthe cap and closing the valve. One is connected to the oil filterand the other is mounted on the compressor. Connect acharging hose to the ¼-in. access fitting port located betweenthe filter and compressor. Bleed off the oil located in this sec-tion. A quart of oil is typically removed during this process.Unscrew the nuts on either side of the filter. Remove the filterand install the new one. Make sure to remove the plastic capsfrom the new filter before installation. Take care not to lose ordamage the new O-rings on the new filter. Draw a vacuum atthe service port. Remove the charging hose and open the oilservice valves. Replace caps on access port and service valves.Check both fittings for leaks.Evaporator ServiceThe 30XV units use flooded style evaporators.ISOLATION VALVEThe isolation valve is a factory-installed option for 30XV units.The option includes a butterfly-style suction service valve on thesuction lines, and manual ball valves on discharge, evaporatorinlet and economizer lines. The butterfly valve is connected tothe suction line by Victaulic connections. See Fig. 65 and 66 fordetails on the butterfly suction service valve operation. Thevalve locks into place when fully opened or fully closed. SeeTable 43 for compressor usage.Table 43 — Compressor Usage30XV UNIT SIZE OIL CHARGE (gal, [liters])Circuit A Circuit B140-325 5.5 [20.8] 5.5 [20.8350 7.5 [28.4] 5.5 [20.8400-500 7.5 [28.4] 7.5 [28.4]QUANTITY TOTALINE PART NO.1 Quart P903-23251 Gallon P903-23015 Gallon P903-2305CAUTIONCompressor oil is pressurized. Use proper safety precautionswhen relieving pressure.30XV UNIT SIZE COMPRESSOR MODELSCKT A CKT B140 - 200 06ZCE1 06ZCE1225 06ZFC2 06ZCE1250 - 325 06ZFC2 06ZFC2350 06ZJG3 06ZFC2400-500 06ZJG3 06ZJG3