As SP is increased, HP and CFM decrease. Check rotation by energizing the unit momentarily. 1. Fan rotation is determined by looking at the fan from the drive end. Air will blow in the other direction (towards the back). xref Read on to know. Ceiling Exhaust and Inline Fans 1 ... direction, by bending it back and forth to break tabs. x�b``�e``1d`e`�g`@ �+G�m6��$�3��z���%�e�� K+�et4�Tc}(��b��2�� �@ �,3�. To do so, carefully disconnect the blade from the pole and unscrew the motor from the frame. The direction of the rotation blows air upwards and downwards respectively. 0000053101 00000 n 53 0 obj <>stream 0000008188 00000 n The Rear or Exhaust side (the side that the air comes out of) of our fans will always be the side that houses the fan motor. 0 JavaScript seems to be disabled in your browser. 0000061978 00000 n It would be the same on an exhaust fan. 0000012077 00000 n If a fan rotated counterclockwise the blade would not push the air out into the room or suck it in. Not all fans are reversible. trailer Do not mount exhaust fans on the bottom of the case; since hot air rises, a bottom-firing exhaust fan will be working against physics by expelling slightly cooler air instead of warmer air.The Intake-exhaust direction should go front-to-back and bottom-to-top. 0000001327 00000 n On single inlet fans, the drive side is the side opposite the fan inlet. 21 0 obj <> endobj In summer, you want to be sure to switch your fan so that the blades move in a counter-clockwise rotation (when you are looking up at them from below). Forward Curve (FC) The tips of the blades are inclined in the direction of rotation; the most common type of centrifugal blower. A typical backward-curved centrifugal fan, in which the blades curve away from the direction in which they rotate Centrifugal cooling fan mounted to heatsink which dissipates heat from processor of a consumer-grade laptop. While normally, all the fans are set to blow air downwards, their rotation being anti-clockwise, there are some fan that offer the reverse rotation, feature too. Bi-directional & self-reversing electric motors run in either direction, CW or CCW 0000077184 00000 n Helpful photos to identify your blower wheel Ceiling fans in themselves do not heat or cool a room, but the ceiling fan rotation allows improved air circulation, which can greatly improve the comfort of your living space. Air flow direction can be reversed on fans fitted with three-phase motors by simply reversing the direction of rotation. A700, 900-1500 Models Remove the eight screws holding the access panel or collar as shown in picture. The reversible fans usually have a reverse wire, which can be connected to reverse the direction of the motor. First, if the axial fan nameplate is marked as "three-phase 380V", then the fan connection voltage is 380V three-phase power supply. The fan's rotation is determined by the direction the unshaded side of the shading coil faces. 0000048597 00000 n What does CWLE or CCWSE really mean? 21 33 Most ceiling fans are designed to rotate in EITHER direction; clockwise or counter-clockwise. A shaded pole motor can be reversed by flipping the frame 180 degrees. 0000009428 00000 n If a blade is angled down and the fan turns in the same direction as the blade angle, it will blow forward. Step 4) Check the load in case it indicate direction of rotation because in pump application sometimes arrow indicated on pumps too. 0000077456 00000 n 0000038896 00000 n Replace access panel or 2. Rotate the fan housing so the discharge is facing up. In the axial fan, in order to change its rotation direction, then the main thing is to look at the fan nameplate, because, according to different circumstances, there are different methods of operation. Ceiling fan direction in the winter should be clockwise, and the fan should run at the lowest speed. Click to see full answer. You can also save in energy costs when the ceiling fan is on the correct setting to support your cooling or heating efforts. rotates in same direction as the arrows on the motor The outer ring of the bearing is spherical and or belt drive assembly. The direction of the rotation is determined from the drive side of the fan. A clockwise ceiling fan direction … 0000004638 00000 n So, which rotation is best for which season? The exhaust fan sucks the hot air out of the attic and the pushes it out into atmosphere. Phone: 215-467-4646 Fax: 215-467-1667 2701 East Tioga Street Philadelphia, PA 19134 humidair@comcast.net. First off, a fan that rotates clockwise, or counterclockwise, simply rotates and does what fans do. Designation for Rotation and Direction of Discharge. I had a guy come out today and he replaced the start capacitor. Improper rotation will result in loss performance, excessive horsepower and possible motor burnout. When looking at the fan so that the circular sticker with the Noctua logo is facing you, the direction of airflow is towards you and the sense of rotation is clockwise: . 0000001210 00000 n These fans are usually wired to run in one direction. direction of rotation. On double inlet fans with drives on both sides, the drive side should be on the same side as the higher-powered drive unit. 0000002393 00000 n 0000000016 00000 n This particular centrifugal fan is powered by a 5-volt brushless DC motor. Generally, it’s best to have as few obstacles as possible between the intake fans on the front of the case and the exhaust fans on the rear and top of the case. In order to check fan whether it is directional or bi directional, check in which direction you get air output from enclosure. Similarly, it is asked, which side of fan is exhaust? Then enhance your home’s ventilation with a ceiling or attic fan. Manage Your Cables and Other Obstructions. But an initial rotation makes torque in one direction greater than the other and starts up the fan. Likewise, if the blade is angled down and the fan turns the opposite direction, the reverse is true. An exhaust fan will rotate in either direction depending on which way you want the airflow to go. Operating by electricity, the overall procedure involves an electric current that passes through the system to make the motor operate, and, in turn, this causes the fan’s blades to move. In this episode of Spec. Fan blades are tilted, and setting to the counterclockwise position pushes air down with the top side of the blade, creating a “wind chill” effect. 0000003142 00000 n This cools us off by evaporation. Exhaust Fans for Pump Room; Upon receiving the unit, check for any damage and report immediately to the supplier/ manufacturer. On double inlet fans with drives on both sides, drive side is that with the higher powered drive unit. FAQ: How can I find out the direction of airflow and sense of rotation? 0000022191 00000 n The back side of a fan is the suction side and the front is the push side. On those fans, there will be an indicator on one of the edges noting airflow direction. Backward curved fans have wheels whose blades curve outward, while radial-tip fans' blades are curved inward and radial at their tips (hence the name "radial tip"), while still in a backwardly-curved configuration. In a fixed-direction electric motor such as on an HVAC blower fan or an A/C or heat pump compressor, each time the motor starts its start capacitor and start winding give the motor a "kick" in the right direction. 3. This pulls cool air up toward the ceiling, which in turn displaces the warm air that rises and collects near the ceiling. For the best experience on our site, be sure to turn on Javascript in your browser. 0000068502 00000 n 0000041119 00000 n The result was that the capacitor was in series with both windings => there was no … Some whole house fans, however, can be reversed to spin in the opposite direction. Step 3) If load is pump, check in which direction you get desired flow rate. 0000059872 00000 n Well, I came to realize, after the tech left, that the fan is rotating the wrong direction. The Intake-exhaust direction should go front-to-back and bottom-to-top. 4. In these examples, the correct direction of rotation is clockwise as viewing the fans from the inlet side (as shown currently in the Figs). Fan Rotation In Summer: Exhaust fans go on the rear or the top. Side-mounted fans can be intake or exhaust, depending on the setup. This is what, I believe, happened when the OP switched red and yellow wires on his fan. 0000055324 00000 n The drive end is is the side of the fan housing through which the fan or motor shaft protrudes. Direction of rotation is very critical. 0000001787 00000 n 0000008948 00000 n 0000031729 00000 n Make sure the fan not hammer on the housing. 0000007765 00000 n Do • Incorrect direction of rotation. 0000003750 00000 n For DWDI or Arrangement 3 SWSI fans, it is the side of the fan housing at which the belt drive sheave is mounted. You will also be able to identify the Exhaust side as you will see power wires entering the fan motor. 0000004527 00000 n It cranked up ok, but there still wasn't something right about the fan-- still seemed slower than normal. 0000002883 00000 n Ceiling fans are great for moving the air and creating a breeze in an otherwise warm room. Whether the fan pushes air in one direction or another depends not so much on the fan’s direction as it does on the design and curvature of the fan … 0000008683 00000 n The impact on performance in reverse rotation approximates to:-Air flow reduction -30% Pressure reduction -55% Power reduction -25% TRULY REVERSIBLE Equal volume flow in both directions can be achieved by blade reversal All it takes is a change in ceiling fan direction, reversing the air flow to suit your needs according to the season. Please use. 0000004751 00000 n Direction of rotation is not critical. When looking at the fan so that the circular sticker with the Noctua logo is facing you, the direction of airflow is towards you and the sense of rotation is clockwise: Do you have a question concerning one of our products? startxref %PDF-1.4 %���� Direction of rotation is determined from drive side of fan (see Note 2 and 3). <<3CD233836619754A8A3B81552F64EE72>]>> 0000046374 00000 n %%EOF the fans will always spin in one direction (depending on the specific fan, due to different fin molding). Their curvature can also be thought of as radial at the tips but gradually sloping toward the direction of rotation. 0000004009 00000 n 0000002848 00000 n Using these fans in the opposite direction from that shown here will result in an increase in the fan’s power consumption, fan noise and also the air volume it moves. This is so they can be used to draw air UP for keeping cooler (lower) air circulating, or to push air DOWN for keeping warmer (higher) air circulating. It's sucking air … Using caution, remove the motor on one side of the frame and the backing on the other. Fan Discharge Rotation For the best experience on our site, be sure to turn on Javascript in your browser. On single inlet fans, drive side is always considered as the side opposite fan inlet (even when driven through fan inlet). 0000000956 00000 n