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5-3. Ensure the distance between ceiling and fan body for the thickness of grille. 5-4. Secure the suspension bracket to joists by using screw. 5-5. Secure the suspension bracket to fan body by using screw. 5-6. Follow step 6 to 9 of installation to complete the installation work. 6. Duct Connection Outside Gradient 1°~2°Inspection Hole Grill Body Tape Duct Inside Ceiling 6-1. Insert the duct into the duct connector and tape all ductworks connection to make them secure and air tight. 6-2. Install the duct with a gradient 1°~2° to the outside. 7. Connect Wiring 7-1. Follow all local electrical and safety codes. 7 -2. N EVER place a switch where it can be reached from a tub or shower. 7-3. Connect wires as shown in wiring diagrams. 7-4. Using wire nuts, connect house power wires to ventilating fan wires. 7-5. 14 AWG (2.1 mm2) is the smallest conductor that shall be used for branch-circuit wiring. 8. Test Run and Grille Attachment 8-1. With the power on, check for abnormal vibration or sound. 8-2. Insert the mounting springs into the slots and mount the grille to the body. 9. Operation Humidity Models: VFB25AEH, VFB25ADH, VFB25ACH 9-1. Humidity control mode: Turn on the power switch to operate humidity control mode, and LED is ON in blue. 9-2. Full speed mode: Cycling ON/OFF switch to operate full speed mode, and LED is amber. Single Speed Models: VFB25AD, VFB25AC 9-3. Single speed control mode: Turn on the power switch to operate ON or OFF. Dual Speed Model: VFB25AX 9-1. Low speed control mode: Turn on the power switch to operate low speed mode, and LED is green. 9-2. High speed control mode: Cycling ON/OFF switch to operate high speed mode, and LED is amber. MAINTENANCE WARNING Disconnect power source before working on unit. Routine maintenance must be done every year. CAUTION 1. Never use gasoline, benzene, thinner or any other such chemicals for cleaning the ventilating fan. 2. Do not allow water to enter motor. 3. Do not soak resin parts in water over 60°C. CLEANING 1. Pull down the spring to remove grille. 2. Wash and clean grille (Use non-abrasive kitchen detergent, wipe dry with new cloth). 3. Remove dust and dirt from ventilating fan using a vacuum cleaner. 4. Using a cloth dampened with kitchen detergent, remove any dirt from ventilating fan. Wipe dry with new cloth. 5. Replace grille. DIMENSIONS SPECIFICATIONS Model No. Voltage (V) Frequency (Hz) Power (W) Air Flow @ 0.1SP (CFM) Weight (lb.) Note VFB25AEH 110-220 50-60 24.0 130 7.52 Humidity Sensor* VFB25ADH 110-220 50-60 16.4 110 7.52 Humidity Sensor* VFB25ACH 110-220 50-60 8.0 80 7.52 Humidity Sensor* VFB25AD 110-220 50-60 16.4 110 7.52 VFB25AC 110-220 50-60 8.0 80 7.52 VFB25AX 110-220 50-60 24.0 110 7.52 Dual Speed 80 4 Spring Slots Ground Neutral On Live Switch Box (Purchase separately) Black White Green Ventilation Fan *If the fan is installed in an environment with relative humidity constantly more than 40%, the fan may keep running when operating in humidity sensing mode since the ...

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