INSTRUCTION BOOK BLOWER ASSEMBLY MODELS BA-300 & BA-310 ©Copyright 1997, 2002, 2008 by Bird Electronic Corporation Instruction Book Part Number 920-BA-300/310 Rev.
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Safety Precautions The following are general safety precautions that are not necessarily related to any specific part or procedure and do not necessarily appear elsewhere in this publication. These precautions must be thoroughly understood and apply to all phases of operation and maintenance. Keep Away From Live Circuits Operating personnel must at all times observe normal safety regulations. Do not replace components or make adjustments inside the equipment with high voltage turned on.
Bird BA–300/310 Blower Assembly Safety Symbols WARNING Warning notes call attention to a procedure which, if not correctly performed, could result in personal injury. CAUTION Caution notes call attention to a procedure which, if not correctly performed, could result in damage to the instrument. The caution symbol appears on the equipment indicating there is important information in the instruction manual regarding that particular area. See page 8 for specific cautions.
WARNING Turn off ac power and RF power when attaching the power cable. Caution Statements The following equipment cautions appear in the text whenever the equipment is in danger of damage and are repeated here for emphasis. CAUTION The BA system is designed for operation in a horizontal position only, with the load’s vent plug up. Do not use in any other manner. CAUTION If installed, connect optional interlock before applying RF power.
Bird BA–300/310 Blower Assembly TOUTE UTILISATION DE CET INSTRUMENT QUI N’EST PAS EXPLICITEMENT PRÉVUE PAR LE FABRICANT PEUT ENDOMMAGER LE DISPOSITIF DE PROTECTION DE L’INSTRUMENT. IMPIEGO QUALORA QUESTO STRUMENTO VENISSE UTILIZZATO IN MODO DIVERSO DA COME SPECIFICATO DAL PRODUTTORE LA PROZIONE DI SICUREZZA POTREBBE VENIRNE COMPROMESSA. SERVICE SERVICING INSTRUCTIONS ARE FOR USE BY SERVICE TRAINED PERSONNEL ONLY. TO AVOID DANGEROUS ELECTRIC SHOCK, DO NOT PERFORM ANY SERVICING UNLESS QUALIFIED TO DO SO.
About This Manual This instruction book covers the following models: BA–300–115 BA–310–115 BA–300–230 BA–310–230 This instruction book is arranged so that essential information on safety is contained in the front of the book. Reading the Safety Precautions Section before operating the equipment is strongly advised. The remainder of this Instruction Book is divided into Chapters and Sections. At the beginning of each chapter a general overview will be given, describing the contents of that chapter.
Table of Contents Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . i About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . v Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Items Furnished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Items Required but Not Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Optional Accessories . . . . . . . . . . . . . . .
Indicator Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Storage and Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .
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Chapter 1 Introduction Bird Blower Assemblies supply forced air cooling to Bird Loads, including Termaline 8890 Series terminations and Tenuline 8329 Series attenuators. The Bird BA–300 consists of two high efficiency fans, with vertical side baffles to direct air over the load’s radiator fins. The blower doubles the normal RF input rating of the installed load, e.g. a 2.5 kW load can dissipate 5 kW.
2 (4) MTG. HOLES BA-300-230 8 ft. 2 in. (2.49 m) LONG BA-300-115 7 ft. 0.5 in. (2.
Chapter 2 Theory of Operation Loads convert RF energy into heat. This heat must be quickly transferred to the surrounding environment to prevent damage to the load. The coolant fluid surrounding the resistor transports the heat to the radiator walls by convection. There, air passing over the radiator fins carries the heat away.
Bird BA–300/310 Blower Assembly 4
Chapter 3 Installation This chapter provides information for on-site requirements, unpacking, inspection, and preparing the unit for use. Unpacking and Inspection 1. Carefully inspect the shipping container for signs of damage. If damage is noticed, do not unpack the unit. Immediately notify the shipping carrier and Bird Electronic Corporation. 2. If the container is not damaged, unpack the unit. Save the packing materials in case the unit should need to be shipped again. 3.
Bird BA–300/310 Blower Assembly Installing Thermoswitch (BA–310 Only) The Bird BA–310 requires a control thermoswitch, P/N 2450-085, for automatic operation. It is normally open, closing at 155 °C (311 °F), with a rating of 10A @ 120Vac and 5A @ 230Vac. WARNING Disconnect the unit from all power sources before servicing. The unit may be energized from multiple sources. The potential for electric shock exists. WARNING The vent plug must be used at all times when the load is operating or cooling.
Installation Thermoswitch Connection (BA–310 Only) Connect the thermoswitch to the Bird BA–310 as follows : CAUTION If installed, connect optional interlock before applying RF power. + NOTE: If your unit has a connector already attached to the thermoswitch cable, you do not need to perform Step 1 through Step 4. 1. Unscrew the large knurled ring-nut (A) at the lower end of the coupling jack assembly (See Figure 2 below). Pull it off the thermoswitch jack (B).
Bird BA–300/310 Blower Assembly Load Resistor To connect the Blower Assembly to a load, follow these instructions: WARNING Disconnect the unit from all power sources before servicing. The unit may be energized from multiple sources. The potential for electric shock exists. WARNING Do not operate with side panel removed. y Remove one of the vertical panels by unscrewing both 10-32 truss head screws. y Place the load on the blower assembly against the remaining vertical panel.
Chapter 4 Operating Instructions CAUTION The Bird BA–300/310 Blower Assembly will derate a load’s specified power by 50% when installed and not running. If the indicator light should turn off, immediately reduce RF power by at least 75%. WARNING Never attempt to connect or disconnect RF equipment from the transmission line while RF power is being applied. Leaking RF energy is a potential health hazard. All Bird Blower Assemblies are equipped with a control switch and a indicator light.
Bird BA–300/310 Blower Assembly Shutdown y Turn off RF power at the source. y Wait approximately 15 minutes, or for the BA–310 fans to stop running. This will allow the load to cool without causing heat stress. y Turn off the blower. Emergency Shutdown Turn off RF power at the source. If the load is equipped with an interlock thermoswitch, RF power will be automatically turned off when the coolant temperature reaches an unsafe level.
Chapter 5 Maintenance This chapter covers cleaning, inspection, troubleshooting, and specifications for the Bird BA–300/310 Blower Assemblies. WARNING Never attempt to connect or disconnect RF equipment from the transmission line while RF power is being applied. Leaking RF energy is a potential health hazard. WARNING Disconnect the unit from all power sources before servicing. The unit may be energized from multiple sources. The potential for electric shock exists.
Bird BA–300/310 Blower Assembly Maintenance Cleaning The intake grills, fan, and inside surface of the baffles should be wiped free of dust and dirt when necessary with a clean soft cloth. Excessive dust will interfere with the efficient dissipation of heat. If the BA–300/310 has been standing without an installed load, check for objects that may have entered the blower openings.
Maintenance Repair WARNING Disconnect the unit from all power sources before servicing. The unit may be energized from multiple sources. The potential for electric shock exists. Fuse The fuse is located in the AC module on the back of the blower. To replace the fuse: y Correct the fuse burnout cause. + NOTE: Common causes include stuck or blocked fans or a short circuit in the motor or blower wiring. y Press the locking tab on the fuse drawer and remove the drawer. y Replace the fuse.
Bird BA–300/310 Blower Assembly Fan To replace a fan assembly: WARNING Disconnect the unit from all power sources before servicing. The unit may be energized from multiple sources. The potential for electric shock exists. 1. Remove the four 8-32 pan head screws from the front and back of the base frame. 2. Pull the fan guard straight off the bottom. 3. Carefully unsolder the color coded connecting wires. Note the connections for resoldering. 4.
Maintenance Figure 4 BA–310 Schematic TO CONTROL THERMOSWITCH BLACK RED GRN/YEL TOGGLE SWITCH WHT/BLK ROTATION AC RECEPTACLE N WHT/BLK FANS L2 L1 INDICATOR LIGHT WHT/YEL L L2 L1 WHT/BLK 15
Bird BA–300/310 Blower Assembly Storage and Shipment Cover the Bird BA–300/310 before storing to keep out dust and dirt. Store in a dry, dust-free environment where the ambient temperature will remain between –40 and +45 °C (–40 to +113 °F). To ship the blower assembly, take the following precautions: y Detach the power cable and tape it securely to the housing. y To ship the blower assembly by itself, pack it in a sturdy corrugated paper shipping carton.
Maintenance Specifications AC Power Requirements: 115 Vac 230 Vac Fuse Rating 115 Vac 230 Vac Thermoswitch 0.6 A @ 50/60 Hz 0.3 A @ 50/60 Hz IEC (5 x 20 mm) Type T 1A 500 mA Normally open. Closes at 155 °C (311 °F) Thermoswitch Rating 115 Vac 230 Vac 10 A 5A Temperature –40 to +113 °F (–40 to +45 °C) Humidity 95% non-condensing max Dimensions* 215⁄8" L x 73⁄8" W x 171⁄4" H (548 x 187 x 436 mm) Weight, Nominal 13.5 lb (6.
Bird BA–300/310 Blower Assembly Replacement Parts DESCRIPTION QTY PART NUMBER Control Thermoswitch (BA–310 only) 1 2450-085 Side Panel Screws (10-32 x 3⁄8" phillips truss head) 4 1120-0619-00 Radiator Base Mounting Screws ( 3⁄8 -16 x 3⁄4" hex head) 4 1124-1207-00 Fuse 5x20mm Type T 1 A, 115 Vac 500 mA, 230 Vac 2 Fuse Drawer 1 Power Cable 115 Vac 230 Vac 1 Lamp 115 Vac 230 Vac 1 Fan Guard 1 Fan 2 5A2257-16 5A2257-13 5-1286 5A2416 5A2409-1 5A2409-2 115 Vac 230 Vac Toggle Switch 18
Limited Warranty All products manufactured by Seller are warranted to be free from defects in material and workmanship for a period of one (1) year, unless otherwise specified, from date of shipment and to conform to applicable specifications, drawings, blueprints and/or samples.
