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Singer 248, 247, 242 manual

Models: 242 248 247

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Singer 248, 247, 242 manual

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Manual 31 pages 50.41 Kb

Related pages Troubleshooting guide for Panasonic SC-HT990 Specifications are subject to change without notice Version M5234E1T for Philips 2.34E+07 teeth or drive shafts. The VFD shall catch a fan spinning in the reverse direction without tripping. The panel shall include a main disconnect with short circuit pro- tection and external operating handle, lockable in the off position for safety. The system shall include a solid state, PI temperature controller to adjust fre- quency output of the drive in response to the tower fluid temperature. The temperature of the fluid and set point shall be displayed on the door of the control panel. The bypass shall include a complete magnetic bypass circuit with capability to isolate the VFD when in the bypass mode. Transfer to the bypass mode shall be automatic in the event of VFD failure or for specific trip conditions allowing safe transfer of utility voltage to the motor. Automatic bypass with an earth ground condition is not allowed. The bypass contactor shall be cycled on and off while operating in bypass, to maintain the set-pointtemperature of the fluid. The drive design shall be oper- ated as a stand-alonesystem without the need for a BMS system. Operator controls shall be mounted on the front of the enclosure and shall consist of start and stop control, bypass/VFD selector switch, Auto/Manual selector switch, manual speed control, and solid-statetemperature controller. An emergency bypass selector switch internal to the panel allowing the fluid cooler fan motor to be run at full speed shall be furnished. To prevent heating problems in the fluid cooler fan motor and to assure proper gear box lubrication the VFD system shall de energize the motor once 25% motor speed is reached and cooling is no longer required. The VFD shall include de-icinglogic with auto canceling and adjustable time. Speed in De-Icemode shall not exceed 50% motor speed. The fluid cooler manufacturer shall supply VFD start-upassistance. Tower vibration testing throughout the speed range is required to identify and lockout any natu- ral frequency vibration levels which may exceed CTI guidelines for SPX Cooling Technologies 7013F081 - 7013J121 Frequently asked questions for Boss Audio Systems BV7300 INSTALLATION for Regency U37-LP1 EMISSION CONTROL WARRANTY PARTS LIST for Husqvarna 359 Character Code List for Star Micronics DP8340 Error code/symptom for IBM HS40 to ground fuse to + battery terminal for Boston Acoustics GT-20 GT-222 PROBLEM for Zanussi FH10 Installation and Operation, cont’d for Extron electronic FOX HD-SDI

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