How to Make Simple Home Hot Water Circulating System with Time Delay Function

Question from customer:

I have a hot water circulating pump: 115V AC 0.4A. I want to be able to turn it on from 3 different locations within the house and have it turn itself off after 2 to 3 minutes. Do you have any equipment which will do this?

Answer to this question:

We think this product may be you want – ac1 channel time delay remote module 0020483 (S1DA-AC220-ANT2 & CB-2). The receiver is relay output (normally open and normally closed). Power supply for the receiver and the water pump are different. That means it will not cause electromagnetic interference during water pump operation. With the external extend antenna, the RF signal can pass through walls and doors as well as floors.

The wiring diagram is shown below.

The water pump will be connected to normally open terminals “B&C”.

After wiring, press buttons of “＋” and “－” on the timer, adjust delay time from 0 second to 99 hours. “H” is Hour, “M” is Minute, and “S” is Second. As you said, we set 3 minutes.

So we set “M 0 3”, it means the delay time is 3 minutes. Press big button: Turn on hot water circulating pump. It will stop working by itself after 3 minutes. You can also press small button to turn it off immediately.

According your requirement, one receiver can be paired with 3 transmitters. Any of transmitters can remote control the pump. You are able to turn it on from 3 different locations within your house and have it turn itself off after 2 to 3 minutes by itself.

So your home hot water circulating system will be like this.

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