User manual GAI-TRONICS 758-002

[. . . ] Where two or more stations are listed, the assumption is that they are evenly spaced along the cable. Mohnton, PA 19540 USA 610-777-1374 800-492-1212 Fax: 610-796-5954 VISIT WWW. GAI-TRONICS. COM FOR PRODUCT LITERATURE AND MANUALS Model 758-002 24 V DC Weatherproof Speaker Amplifier Enclosure Pub. 42004-260B Page: 2 of 9 Each amplifier contains two fuses on the PCBA in the 24 V dc input to protect and isolate the handset and speaker amplifier circuitry in the event of a failure. Power line wiring to each amplifier or group of amplifiers should have a fuse or circuit-breaker to protect against wiring failures. [. . . ] (~1. 1 amperes when unit is producing a 12-watt sine wave output. ) · · · · For conditions other than above, the following formula may be helpful in calculating the approximate maximum distance for a single station. For continuous tone applications with minimum distortion: For speech operation only, multiply the above result by a factor of 2 to a maximum factor of 4. Example: What is the approximate maximum distance for a single dc station if the voltage feed is 27. 5 V dc and a No. 14 AWG @ 20 ºC = ~0. 002525 ohms per foot Vfeedpoint = 27. 5 V dc Solution: (27. 5 V ­ 21 V) / ((2 × 0. 002525 ohm per foot) × 1. 1 amp) = 6. 5 / 0. 005555 = 1170 feet (for continuous tone signal) or up to ~4680 feet (× 4) for speech signals f:\standard ioms - current release\42004 instr. manuals\42004-260b. doc 11/10 Model 758-002 24 V DC Weatherproof Speaker Amplifier Enclosure Pub. 42004-260B Page: 4 of 9 Mounting The Model 758-002 Weatherproof Speaker Amplifier Enclosure is supplied with pre-drilled cable openings and conduit hubs with top and bottom cap plugs in place to prevent contamination. Whenever possible, do not enter an enclosure from the top: bottom entry helps to prevent moisture from dripping onto the terminals or PCBAs. There are four 0. 44-inch diameter mounting holes in the corners of the amplifier enclosure. The suggested mounting height for all station enclosures is 54 inches (137 cm). Figure 1. Model 758-002 24 V DC Weatherproof Speaker Amplifier Enclosure f:\standard ioms - current release\42004 instr. manuals\42004-260b. doc 11/10 Model 758-002 24 V DC Weatherproof Speaker Amplifier Enclosure Pub. Follow the wire colors carefully, because the colors correspond to GAI-Tronics 60029 or 60038 Series cable. The wires must be spade-lugged and connected securely to the terminal block. An improper termination may diminish station performance. Mutual Muting In the event that feedback occurs within an area and repositioning of the system speakers does not help, mutual muting may be used to correct this problem. Perform the following steps to mutually mute the adjacent amplifiers/handsets within a zone. Ensure that the purple lugged wire on the Model 758-002 Enclosure is connected to terminal 7 of TB1. Connect terminal TB1-7 of the handset station to TB1-7 of the Model 758-002 Enclosure within the zone that is causing feedback. This is done by using the spare system wire (orange conductor) from within the system cable that runs between the stations. Figure 2. manuals\42004-260b. doc 11/10 Model 758-002 24 V DC Weatherproof Speaker Amplifier Enclosure Pub. 42004-260B Page: 6 of 9 Maintenance Regular inspection and a good preventive maintenance program will increase the reliability of your GAI-Tronics station. The GAI-Tronics Field Service Department can formulate a service contract suited to your facility's specific need for preventive maintenance. In addition, the following procedure can be used to keep Page/Party® systems operating effectively. [. . . ] (2. 3 kg) Approvals NRTL Listed for USA and Canada. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . If the services fail to meet the applicable industry standard, GAI-Tronics will re-perform such services at no cost to buyer to correct said deficiency to Company's satisfaction provided any and all issues are identified prior to the demobilization of the Contractor's personnel from the work site. Re-performance of services shall be Buyer's sole and exclusive remedy, and in no event shall GAITronics warranty obligations with respect to services exceed 100% of the total cost of the services provided hereunder. Warranty Periods. Every claim by Buyer alleging a defect in the goods and/or services provided hereunder shall be deemed waived unless such claim is made in writing within the applicable warranty periods as set forth above. Provided, however, that if the defect complained of is latent and not discoverable within the above warranty periods, every claim arising on account of such latent defect shall be deemed waived unless it is made in writing within a reasonable time after such latent defect is or should have been discovered by Buyer. Limitations / Exclusions. The warranties herein shall not apply to, and GAI-Tronics shall not be responsible for, any damage to the goods or failure of the services supplied hereunder, to the extent caused by Buyer's neglect, failure to follow operational and maintenance procedures provided with the equipment, or the use of technicians not specifically authorized by GAI-Tronics to maintain or service the equipment. [. . . ]