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413 External Pump with Circ-Logic <br /> Rinnai SENSE TM Tankless Water Heaters include Circ-Logic technology that offers the comfort and <br /> convenience of instant hot water with the use of an external recirculation pump. Circ-Logic controls the <br /> on/off sequence and operation cycles of the external recirculation pump through the programming of <br /> the tankless water heater's parameter settings. In commercial settings, the external pump cable is not <br /> included with the tankless water heater and must be purchased separately. Circ-Logic operates in either <br /> Economy or Comfort mode based on the parameter settings of the water heater. <br /> • Economy Mode—Cycles the pump less often, using less energy to maintain the circulation loop <br /> temperature. <br /> • Comfort Mode—Cycles the pump more frequently, ensuring the loop temperature remains higher <br /> (but also uses more energy). <br /> Table 33 <br /> Rinnai Set Temperature <br /> 140 135 130 125 120 115 110 108 106 104 102 100 98 <br /> Typical Pump OFF Intervals (Minutes) <br /> Economy 18 20 22 24 28 32 38 40 44 48 52 56 62 <br /> Comfort 9 10 11 12 14 16 19 20 22 24 26 28 31 <br /> ■ <br /> ■ <br /> ■ <br /> ■ <br /> ■ <br /> Components ; <br /> ' within dashed ; <br /> • <br /> • line are inside <br /> ■ <br /> ' water heater <br /> External Pump . <br /> Harness: • ' <br /> Rinnai Part • ' <br /> Number ' <br /> 105000250 <br /> \\a mama ■■■magma. ..........■...........� <br /> GIN <br /> Connect Ground(GN/ <br /> wire to tankless housing <br /> w a-BL <br /> BK-; R FUSE <br /> Figure 70 <br /> Rinnai Tankless Water Heater Installation and Operation Manual 67 <br />