Integrating DHW recirculation

on demand dhw recirculation can work with a harvest thermal battery system as shown in the plumbing system diagram docid\ gqxd rmb3njphlsmixqbx , a dhw recirculation pump must be connected "outside" of the harvest pod thermal battery system, between the utility cold water coming into the pod (b) and the dhw exiting the pod (c) warning always on and timer based dhw recirculation systems will destratify the storage tank and cripple the thermal battery system operation only use on demand dhw recirculation here are some examples of on demand dhw recirculation systems that work well with the harvest thermal battery system for homes with a dedicated return line smart aquastat control 32 is a controller that will sense when a dhw call is made and turn on the pump this means that a short use of any hot water tap is equivalent to pushing a button to start the recirculation pump choose a recirculation pump that will move 2 4 gpm of water, so that once a hot water tap is initially turned on and off, water is recirculated as quickly as possible smart aquastat 32 controller settings temperature range 80f 90f when the temperature is below 80f at the recirculation pump, the pump will turn on when triggered by the flow sensor, and will then turn off when the temperature reaches 90f at the recirculation pump max pump run time 3 min it rarely takes longer than 3 minutes to circulate water in the dedicated return line, and this setting helps to minimize any issues if the temperature sensor is not reading accurately instructions on how to reconfigure a smart recirculation control 32 as a smart aquastat control 32 the firmware can be updated via the smartphone app start the app and connect to your controller there is a firmware menu button at the bottom right of the app there is an option on the firmware update screen to “show all firmware versions” which will display the firmware from our entire product line select the smart aquastat 32 firmware and install that one of the temperature sensors needs to be disconnected there are two temperature sensors plugged into an rj 14 splitter disconnect the temperature sensor that is on the plumbing line c, coming out of the pod the remaining temperature sensor should be on the dedicated return line right next to the recirculation pump follow the instructions above to apply the right settings for the smart aquastat 32 controller for homes without a dedicated return line tacogenie 006 ct pump is an example of an on demand pump attached to the hot and cold water lines under a remote kitchen or bath fixture