Instruction Sheet 3⁄ " 4 102-163 Differential Bypass Valve Model 3196 SUPERSEDES: February 1, 2005 EFFECTIVE: March 1, 2005 Plant ID No. 001-3817 1. Connect the Taco 3196 Differential Bypass valve between the supply and return lines of the system as shown in the typical installation diagram. Be sure to install with the flow arrow in the correct direction, flowing from the supply to the return. 2. Turn adjustment indicator all the way clockwise until it stops. 3. Refill, purge and restart the heating system. Once the system is up and running at normal operating temperature it is time to set the differential bypass valve. 4. Make sure all zone valves are open and calling for heat. One way to accomplish this is to turn all thermostats up to their maximum temperature settings. 6. Once an increase in temperature is felt on the outlet side of the bypass valve stop turning counterclockwise, this temperature rise indicates there is now flow through the valve. WARNING: The pipe may become extremely hot very quickly once the valve opens. SYSTEM CIRCULATOR ZONE VALVES 5. After waiting for approximately 2 minutes to be sure the zone valves are fully open, begin turning the differential bypass valve’s adjustment indicator counterclockwise. M M M P DIFFERENTIAL BYPASS VALVE 7. Once flow is established through the bypass valve with all zones open, turn the indicator approximately one full turn clockwise to stop flow through the valve with all zones open. The valve is now set to begin bypassing excess flow velocity as zones close. 8. Return thermostats to preferred temperature settings. TYPICAL INSTALLATION DIAGRAM LIMITED WARRANTY STATEMENT 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 (1) year from the date of start-up or one (1) year and six (6) 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 local Taco stocking distributor or Taco in writing and promptly deliver the subject product or part, delivery prepaid, to the stocking distributor. For assistance on warranty returns, the purchaser may either contact the local Taco stocking distributor or Taco. If the subject product or part 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 addition of petroleum-based fluids or certain chemical additives to the systems, or other abuse, will not be covered by this warranty. If in doubt as to whether a particular substance is suitable for use with a Taco product or part, or for any application restrictions, consult the applicable Taco instruction sheets or contact Taco at [401-942-8000]. Taco reserves the right to provide replacement products and parts which are substantially similar in design and functionally equivalent to the defective product or part. Taco reserves the right to make changes in details of design, construction, or arrangement of materials of its products without notification. TACO OFFERS THIS WARRANTY IN LIEU OF ALL OTHER EXPRESS WARRANTIES. ANY WARRANTY IMPLIED BY LAW INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS IS IN EFFECT ONLY FOR THE DURATION OF THE EXPRESS WARRANTY SET FORTH IN THE FIRST PARAGRAPH ABOVE. THE ABOVE WARRANTIES ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR STATUTORY, OR ANY OTHER WARRANTY OBLIGATION ON THE PART OF TACO. TACO WILL NOT BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF ITS PRODUCTS OR ANY INCIDENTAL COSTS OF REMOVING OR REPLACING DEFECTIVE PRODUCTS. This warranty gives the purchaser specific rights, and the purchaser may have other rights which vary from state to state. Some states do not allow limitations on how long an implied warranty lasts or on the exclusion of incidental or consequential damages, so these limitations or exclusions may not apply to you. DO IT ONCE. DO IT RIGHT.™ TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Visit our web site at: http://www.taco-hvac.com FAX: (401) 942-2360. Telephone: 905/564-9422. FAX: 905/564-9436. Printed in USA Copyright 2005 TACO, Inc.