Configuring Recirculation - Rinnai SENSEI RSC160i Installation And Operation Manual

5.7 Configuring Recirculation

Smart-Circ™ is the factory default setting for recirculation. Smart-Circ™ allows the water heater to identify
when hot water is used, and then operates recirculation on subsequent days to reduce wait time for hot
water. If a fixed recirculation schedule is desired, then installation of an MC-195T-US Timer/controller or
control·r™ Wi-Fi Module is required.
Fixed recirculation schedule requires the installation of one of the following controllers to set time
intervals and duration of recirculation system operation. Smart-Circ™ is automatically disabled if a
scheduling controller (MC195T-US/ control•r™) is installed.
Figure 76
MC-195T-US Timer/Controller
Wired in digital control with integrated
timer function for recirculation control.
Fixed schedule recirculation for RSC models requires the installation of the control·r™ Wi-Fi Module or
MC-195T-US controller.
If the control•r™ Wi-Fi Module or MC-195T-US controller are not installed, temporary pump operation can
be initiated by resetting power to the appliance.
On Demand push buttons and motion sensors require installation of a controller (see section "3.6
Accessories" for part numbers). Visit rinnai.us/wifi for more information.
Note: Recirculation parameter setting 04 must be set to your circulation mode. See "Parameter Settings"
section in this document for more information.
DO NOT install the control•r™ Wi-Fi Module and MC-195T-US together as they are NOT compatible
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accessories.
A Thermal Bypass Valve can be installed with water heaters to operate recirculation without a dedicated
return line. The Thermal Bypass Valve should be installed between the hot and cold line at the farthest
fixture in the plumbing system. Refer to the Crossover Mode section of this manual for additional
details.
NOTE: Thermal Bypass Valve should only be used for Crossover Mode Recirculation systems.
Thermal Bypass Valve
Figure 78
Rinnai Tankless Water Heater Installation and Operation Manual
1
control•r™ Wi-Fi Module
Wired in digital control with integrated
timer function for recirculation control.
Included
Cold
Hot
Figure 79
Figure 77
75