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FUJITSU GENERAL AMERICA, INC SERVICE BULLETIN 353 Route West. Fairfield, NJ 07004 Number: 0006 Ph: 973-575-0381 Fx: 973-836-0449 Date: 9/22/09 Rev2 Em: ServiceHVAC@fujitsugeneral.com Type: Field PROBLEM Fresh Air Intake w/ Compressor Operation Only SOLUTION Duct Fan Control MODEL :18/24/36/42RLX Systems Production: All Cassettes 1.
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4. Components utilized Current sensor with built-in relay specifications: Split Core Fixed Threshold Current Status Sensor with Command Relay and Switching Power Supply. FGAI Fresh Air Kit Part # KHRS940-25 5. Recommended Fan size. Duct and Fan are field supply. A fan capable of generating 15 CFM at a static pressure of approximately .26 inches W.C.
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Current Sensor Installation • Install the current sensor around one of the compressor line voltage wires. • Tuck sensor into the clearance behind the compressor wire molex plug. • Secure the current sensor with a zip tie.
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Secure Current Sensor • 4 zip ties are needed for correct installation. • Secure the current sensor wires with all four zip ties according to the arrows. Do not tie around any of the copper lines. •Cut the ends of the zip ties.
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CEILING CASSETTE OUTSIDE (FRESH) AIR INTAKE 58.8 Pa .24 in W.C. 15 CFM 4” Duct Outside (Fresh) CASSETTE Air Intake 2.75” x 4” Field Supplied Transition Fan Static Pressure Requirements: Static pressure required at Cassette = .24 in W.C. 25 ft. 4” duct + intake=45ft. TEL x .04/100 = .018 in W.C. TOTAL =.258 in W.C.