User manual TJERNLUND EF DUCT BOOSTER FANS 8504057 REV.793

[. . . ] INSTALLATION The EF-AUTO fans are usually used in branch ducts, not the main supply or "trunk line" duct. All models can be easily mounted in sheet metal or flexible duct. DO NOT install the EF-AUTO Series fans where the temperature of air within the duct exceeds 150 degrees F. This temperature would rarely be found on a forced air system. [. . . ] Seal both sides with duct tape and/or a flexible duct clamp. Support with plumber's strap or other suitable method if necessary. DIAGRAM A AIR FLOW 8050017 10/20/08 ©2008 TJERNLUND PRODUCTS, INC. ALL RIGHTS RESERVED P/N: 8504157 SHEET METAL DUCT (Diagram B) Choose a joint on the existing duct where the EF-Series fan will be mounted. IMPORTANT: For proper operation of the PRC control do not install the EF-AUTO within 10 duct diameters from outlet end supply register. For example if the duct is 6", 6 x 10 = 60" from outlet supply register. Separate the existing duct sections at the joint. Cut a piece of duct on the female side of the existing duct 1 inch shorter than the shroud length of the EF-Series model being installed. NOTE: DO NOT CUT OFF A PIECE OF EXISTING DUCT WHICH HAS THE CRIMPED END. Insert fan in duct with fan blade facing the direction of air flow, (See Diagram B). If extra support is necessary, use screws provided. Proceed to next step if EF-AUTO does not turn on. Block register at end of EF-AUTO duct run and turn on air handler fan/blower. If EF-AUTO turns on with register blocked, verify furnace filter is clean. Replace filter if dirty and see if EF-AUTO turns on when air handler fan/blower is running. If filter is clean, move EF-AUTO closer to the Air handler fan/blower to see if higher pressure turns EF-AUTO on. Proceed to next step if EF-AUTO does not turn on. CAUTION: You will need to check for voltage across PRC control to proceed. Pull motor leads off of M1 & M2 on PRC sensing control. With forced air handler fan/blower running, check for 115 VAC across M1 & M2 on PRC sensing control, (See Diagram C). If voltage is present apply 115 VAC to motor leads to see if motor is defective. If voltage is not present, replace PRC control board or contact Tjernlund Products, Inc. [. . . ] warrants to the original purchaser of this product that the product will be free from defects due to faulty material or workmanship for a period of (1) year from the date of original purchase or delivery to the original purchaser, whichever is earlier. Remedies under this warranty are limited to repairing or replacing, at our option, any product which shall, within the above stated warranty period, be returned to Tjernlund Products, Inc. at the address listed below, postage prepaid. THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE HEREOF, AND TJERNLUND PRODUCTS, INC. [. . . ]