How to Program Timer for Grundfos Circulator Pumps

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If you are wondering how this works, a return water line is installed near the faucet farthest from the water heater. The return line is connected to the pump and flows the water back into the water heater. It creates a continuous loop of slow moving hot water. Then when you turn on your faucet or shower, you have ready hot water. If you have a new pump just installed make sure there is water in the line before you turn on the pump.

Grundfos 599388 Timer is designed only for use with specified Grundfos Series UP circulators installed in indoor hot water service systems. Applicable Series UP models include all single speed UP 10-15, 1-phase, 115 volt, 60 hertz pumps with date codes of 0528 and higher.

The Grundfos Timer control is designed to turn the circulator on and off at preset times, allowing the user to select operation of the circulator during high use periods of the day.


Technical Specifications of Grundfos 599388 Timer:
•Supply Voltage: 115-120 VAC, 60 hertz;
•Contact Rating: 16 amps;
•Ambient Temperature: -4F to 175F;
•Shortest Switching Interval: 15 minute increment;
•Switch Modes:"Timer", "ON" Override, "OFF" Override;
•Protection: Clear plastic cover for dust and moisture protection of the clock face;

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