Carrier AQUASNAP 30RAP010-150 Start Up & Operation Manual

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Carrier AQUASNAP 30RAP010-150 Start Up & Operation Manual Manual pdf 59 page image

59The flow sensor cable is provided with (3) LEDs that indi-cate if 24 vac power is present and also status of the switchcontacts. The LEDs are as follows:• Green LED ON – 24 vac present• One Yellow LED ON – Flow sensor switch OPEN• Two Yellow LED ON – Flow sensor switch CLOSEDIf nuisance trips of the sensor are occurring, follow the stepsbelow to correct the situation:1. Check to confirm that the factory installed strainer isclean. Use the blow-down valve provided or remove thescreen and clean it. For the case of VFD controlledpumps, ensure that the minimum speed setting has notbeen changed.2. Measure the pressure drop across the cooler or cooler/pump system and compare this to the system requirements.3. Verify that cable connections at the switch and at the ter-minal block are secure.4. For factory-installed hydronic systems, verify that:• All air has been purged from the system.• Circuit setter balance valve has been correctly set.5. Pump impeller has been improperly trimmed and is notproviding sufficient flow.6. Wrong pump motor rotation. Pump must rotate clockwisewhen viewed from motor end of pump.Strainer — Periodic factory-installed strainer cleaning isrequired. Pressure drop across strainer in excess of 3 psi(21 kPa) indicates the need for cleaning. Normal (clean) pres-sure drop is approximately 1 psi (6.9 kPa). Open the factory-installed blowdown valve to clean the strainer. If required, shutthe chiller down and remove the strainer screen to clean. Whenstrainer has been cleaned, enter ‘YES’ for Strainer Mainte-nance Done (Run StatusPMS.T.MN).Condenser Fans — Each fan is supported by a formedwire mount bolted to a fan deck and covered with a wire guard.METAL FANS — The exposed end of fan motor shaft is pro-tected from weather by grease and a rubber boot. If fan motormust be removed for service or replacement, be sure to re-grease fan shaft and reinstall fan guard. For proper perfor-mance with the value sound fan option, fan web should be0.32 in. (8 mm) below top of orifice on the fan deck to top ofthe fan hub. (See Fig. 40.) Tighten set screws to 15 ± 1 ft-lb(20 ± 1.3 N-m).LOW SOUND FAN — A shroud and a wire guard provideprotection from the rotating fan. The exposed end of the fanmotor shaft is protected from weather by grease. If fan motormust be removed for service or replacement, be sure to re-grease fan shaft and reinstall fan guard. The fan motor has astep in the motor shaft. For proper performance, fan should bepositioned such that it is securely seated on this step. Apply re-moveable threadlocker Loctite 242 to threads. Tighten the boltto 15 ± 1 ft-lb (20 ± 1.3 N·m).Motormaster® V Controller — The Motormaster V(MMV) controller is standard on size 010 and 015 units. Forother sizes, the optional or accessory Motormaster V controlleruses an input signal from the AUX board. See Fig. 41. Thecontroller is factory configured and requires no field program-ming. If a situation arises where the drive does not functionproperly, the information provided below and in Table 30 canbe used to troubleshoot the drive.GENERAL OPERATION — The speed varies in proportionto a 4 to 20 mA signal produced by the ComfortLink controls.The MMV output speed is displayed in Hz.The ComfortLink controls must be configured for MMVoperation in order for it to operate. This is configured under theConfiguration menu (ConfigurationMMMMR.S) andselecting “YES”. This configuration menu also contains thegains and minimum speed for the Motormaster control logic.CONFIGURATION — The MMV is configured for 1 of 12operation modes based on the inputs to the control terminalblock. The 30RAP units use operating modes 5-8. In theseIMPORTANT: Check for proper fan rotation (clockwisewhen viewed from above). If necessary, switch any2 power leads to reverse fan rotation.Fig. 40 — Metal Fan Mounting Positiona30-4976NOTE: Dimensions are in mm.IMPORTANT: Check for proper fan rotation (counter-clockwise when viewed from above). If necessary, switchany 2 power leads to reverse fan rotation.WARNINGHazard of electrical shock. Wait three minutes after discon-necting incoming power before servicing drive. Capacitorsretain charge after power is removed. Drive assemblyincludes externally mounted current limiting resistors. Useextreme caution when servicing the drive. Failure to com-ply may result in personal injury.WARNINGWhen configured as shown in this literature, this equip-ment is designed to start when it receives line power.Ensure that all personnel are clear of fans and guards areinstalled before applying power. Failure to comply mayresult in personal injury.CAUTIONDO NOT connect incoming AC power to output terminalsT1, T2, and T3. Severe damage to the drive will result. Donot continuously cycle input power to the drive more thanonce every two minutes. Damage to the drive will result.CAUTIONIf input power has not been applied to the drive for a periodof time exceeding three years (due to storage, etc.), theelectrolytic DC bus capacitors within the drive can changeinternally, resulting in excessive leakage current. This canresult in premature failure of the capacitors if the drive isoperated after such a long period of inactivity or storage. Inorder to reform the capacitors and prepare the drive foroperation after a long period of inactivity, apply inputpower to the drive for 8 hours prior to actually operatingthe motor. Before attempting to operate the drive, motor,and driven equipment, be sure all procedures pertaining toinstallation and wiring have been properly followed. Fail-ure to comply may result in equipment damage.