The plumber mentions that the check valve inside is not necessary but I can leave it. The installation 'instructions' for the Grundfos UP10-16 A PM BU/AC call for the sensor that 'trains the pump' by checking for hot water demand to be installed on the line flowing from the hot water heater to the hot water delivery line and specifies 8-20 inches from the outlet (20-50 cm.) Both of these systems use a comfort valve or sensor valve which gets installed at the farthest sink from the water heater. Comfort valves / sensor valves close once hot … Close the cold water angle stop valve below the sink. Homes that have on-demand or tankless water heaters, this is significant, since otherwise it would be a bit of a wait before the cold water clears out of the pipes and the hot water reaches you. and not by Grundfos' warranty. Re: grundfos cs-1 comfort system; Author: Paul48 (CT) It's not about doing it wrong....the valve has to have check valves in it,their way of troubleshooting it confirms that.Without knowing exactly what is going on,I wouldn't feel comfortable without putting an expansion tank in unless I … View and Download Grundfos Up15-10su7p installation and operating instructions manual online. Ensure that the pump's protective cover is in place for outside installations. These problems exist with thermostatic comfort valve recirculation systems according to nearly 100 professionals at the 2006 Southern California Annual Plumbing Heating Cooling Contractors trade show. Have you installed the Grundfos Comfort Series Instant Hot Water Recirculator or the WATTS Premiere Instant Hot Water Recirculator. The pump is installed correctly and the lines into and out of the pump are both hot. So I think the problem is not with the pump. MY 9-year- old Grundfos hot water recirculating pump suddenly quit sending hot water to the farthest hot water faucet. Once you have installed your Instant Hot Water Recirculating System you can locate any issue you are experiencing here and we will walk you through step-by … 2941 Brighton Road Boulevard TLC No. I checked online, and am guessing I need a new bypass valve. Two weeks later, a new problem appears. Magically all of my problems seem to be solved--no more air in line and water hammer disappears. 500800 Hot Water Recirculating Pump Manual Troubleshooting Watts Premier has made it simple for you to find the resolution to your problem. 2. The Grundfos MQ is a non-submersible pump. Grundfos will not be liable for damage or wear to products caused by abnormal operating conditions, accident, abuse, misuse, unauthorized alteration or repair, or if the product was not installed in accordance with Grundfos' printed installation and operating instructions. 10. Page 35 GRUNDFOS Kansas City GRUNDFOS Canada GRUNDFOS México 9300 Loiret Blvd. To obtain service under this warranty, the 15 Lenexa, Kansas 66219 Oakville, Ontario L6H 6C9 Canada Parque Industrial Stiva Aeropuerto Phone: (913) 227-3400 Phone: +1-905 829 9533 C.P. Comfort System Hot Water Recirculation System. Valve may be mounted to the wall with supplied mounting screws if desired. Do not use force when connecting the pipes to the pump. Do not start the pump unless it has been filled with water, or primed. There was a check valve installed horizontally just before the tank, so now I have 2. Valve Operation If there is no hot water at the faucet or there appears to be too much hot water on the cold water side the following steps will determine if the valve is operating correctly: 1. Do not remove the pressure tank from the pump unless it has been vented through the air escape valve. up15-10su7p water pump pdf manual download. 66600 Apodaca, N.L. 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