12520 3 Taco 110 24 Instructions 102 052 (Page 2) User Manual
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User Manual: Pump 12520 3 Taco 110-24 Instructions
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Instruction Sheet Horizontal Circulators 102-052 Nos. 110 thru 120 SUPERSEDES: 102-052 February 1, 1986 EFFECTIVE: April 15, 2001 Plant I.D. 001-318 APPLICATION: 1. 2. 3. 4. Maximum recommended working pressure is 125 psi (862 kPa). Maximum water temperature must not exceed 240°F. Cast iron circulators should be used for closed systems only. Bronze circulators must be used in open or fresh water systems and potable water systems. INSTALLATION: 1. Mounting position – Circulators must be mounted with the motor in a horizontal position. 2. Rotating casing – Casing has an arrow on the front which indicates direction of flow. To rotate casing, remove the casing bolts, rotate casing and replace bolts. Make sure gasket is properly located before tightening bolts. 3. Electrical connections – Observe all applicable codes when connecting to power supply. The motors do not require overload protection. 4. Fill system – It is good practice to flush a new system of foreign matter before starting the circulator. TO REPLACE MOTORS: 1. 2. 3. 4. 5. 6. Disconnect wiring. Loosen the two set screws at pump end of spring coupling, remove bolts between bracket and motor and separate. Loosen other set screw of coupling and remove coupling from old motor. Slide coupler with single set screw over new motor shaft and tighten against flat surface of shaft. Place new motor assembly into bracket and replace bolts. Extend pump end of spring coupling over impeller shaft 3⁄16" and tighten both set screws. If impeller and shaft move into body during this operation, water will flow from weep hole in bracket. If this does occur, extend spring coupler a little more or until water stops flowing. CAUTION: UNDER NO CIRCUMSTANCES SHOULD THE WEEP HOLE BE PLUGGED. 7. Rewire motor. TO REPLACE SPRING COUPLING: Follow same procedure outlined above. LUBRICATING INSTRUCTIONS: Re-oil pump and motor annually with SAE No. 30 oil. CAUTION: The addition of certain chemical additives to systems utilizing TACO equipment voids the warranty. DO IT ONCE. DO IT RIGHT. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Visit our web site at: http://www.taco-hvac.com Printed in USA Telephone: (401) 942-8000 FAX: (401) 942-2360. Telephone: 905/564-9422. FAX: 905/564-9436. Copyright 2001 TACO, Inc. REPLACING SEALS: Water flowing from weep hole in bracket normally indicates dirt on the seat or seal needs replacement. Before taking pump apart, extend spring coupling and impeller shaft into body as far as it will go. This will separate the seal halves and permit a greater flow through the weeping hole and wash any foreign matter off the seats. Release and if flow stops, it indicates that the seals do not require replacement. If the flow does not stop, loosen the two set screws on the coupling and extend as far as it will go. If leak stops, it means there was insufficient tension on the coupling. If leak continues, indications are that the seal needs replacement. Proceed as follows: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. Disconnect wiring. Valve off or drain system. Remove body bolts and pull entire assembly out of body. Loosen the two set screws at pump end of spring coupler, file off any burrs on shaft and pull impeller and shaft from bracket. Pry out old seal seat from bracket with a screwdriver and old part from impeller shaft with a pair of pliers. Clean shaft and seal bearing surfaces thoroughly with clean cloth. Dip CARBON part of seal in water to lubricate. Place on top of impeller shaft with carbon facing up. Push down on shaft with palm of hand as far as it will go. Then with both thumbs push all the way down, making certain that prongs engage the two holes in the impeller. If there are no holes in the impeller, break off the prongs with a pair of pliers and smooth burrs with a file. Separate rubber from ceramic part, wet it and set into recess in bracket. Set ceramic seal into rubber with seat facing out by starting at a slight angle first, then pushing away and down simultaneously. The rubber rings should not be folded over during the operation. Make certain that both the rubber and ceramic are “bottomed” squarely. Clean both seal surfaces with a clean lintless cloth. Place a few drops of oil along the impeller shaft and push slowly with a twisting motion through ceramic part into bracket and spring coupling. While holding impeller and shaft with seal faces mating, insert an Allen wrench into one of the set screws in the coupling. Extend spring 3⁄16". Remove old body gasket, clean surfaces and replace with new gasket. Place entire assembly into body, replace and tighten bolts gradually and evenly all around. Refill system. If water leaks from weep hole in bracket, increase tension on spring coupling slightly or until leak stops. Rewire motor. WARRANTY TERMS (ALL PRODUCTS EXCEPT 00 SERIES CIRCULATORS, 570 SERIES ELECTRIC ZONE VALVES, COMMERCIAL PUMPS, COMMERCIAL CIRCULATORS. SEE SEPARATE STATEMENTS OF WARRANTY TERMS FOR THESE PRODUCTS.) Taco, Inc. will repair or replace without charge (at the Company’s option) any product or part which is proven defective under normal use within one year from the date of start-up or one year and six months from date of shipment (whichever occurs first). In order to obtain service under this warranty, it is the responsibility of the purchaser to promptly notify the company in writing and promptly deliver the item in question, delivery prepaid, to the factory. For complete details on warranty returns, the purchaser should contact a local Taco stocking distributor or the Company. If the product or part in question contains no defect as covered in this warranty, the purchaser will be billed for parts and labor charges in effect at time of factory examination and repair. Any Taco product or part not installed or operated in conformity with Taco instructions or which has been subject to misuse, misapplication, the presence of certain chemicals (such as solvents, acids, etc.) or other abuse will not be covered by this warranty. For complete information on chemical and application restrictions, the purchaser should contact the Company. Taco, Inc. reserves the right to make changes in details of design, construction, or arrangement of materials of its products without notification. TACO, INCORPORATED OFFERS THIS WARRANTY IN LIEU OF ALL OTHER EXPRESS OR IMPLIED WARRANTIES. NO WARRANTIES ARE MADE FOR MERCHANTABILITY OR FITNESS FOR USE AND THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION CONTAINED HEREIN. TACO, INC. WILL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES.
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