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Related Manuals for Rinnai Circ-Logic
Summary of Contents for Rinnai Circ-Logic
- Page 1 For SENSEI™ and non-SENSEI™ Tankless Water Heaters...
- Page 2 5.1 SENSEI™ and Non-SENSEI™ Recirculation Using One Tankless Water Heater ..12 5.2 SENSEI™ Recirculation Using Two Tankless Water Heaters ........13 5.3 Non-SENSEI™ Recirculation Using Two Tankless Water Heaters ........ 14 READ AND SAVE THESE INSTRUCTIONS Rinnai Circ-Logic with Grundfos GTK03 Kit...
- Page 3 Circ-Logic with VC, KB, and SENSEI™ series tankless water heaters on a dedicated return line with the use of an external pump. For all models, Circ-Logic operates in either Comfort or Economy Mode (the modes are selected by dip switches/parameter settings inside the water heater): •...
- Page 4 36°F to 150°F up to a maximum pressure of 145 PSI. The proper operating voltage and other electrical information can be found on the nameplate attached to the top of the motor. Rinnai Circ-Logic with Grundfos GTK03 Kit...
- Page 5 It is recommended that isolation valves be installed on each side of the pump. If possible, do not install elbows, branch tees and similar fittings just before or after the pump. Provide support to the pump or adjacent plumbing to reduce thermal and mechanical stress on the pump. Rinnai Circ-Logic with Grundfos GTK03 Kit...
- Page 6 Install the Rinnai Tankless Water Heater according to the Rinnai Tankless WARNING Water Heater Installation and Operation Manual. The water heater must be electrically grounded in accordance with local codes and ordinances or, in the absence of local codes, in accordance with the National Electrical Code, ANSI/NFPA No. 70. Indoor water heaters are equipped with a three-prong (grounding) plug for your protection against shock hazard and should be plugged directly into a properly grounded three-prong receptacle.
- Page 7 Press the “A” button for one second. b. Use the (Up) and (Down) button on the controller to select a setting number following the table below. Refer to the Rinnai Tankless Water Heater Installation and Operation Manual for the complete Parameter Settings table. Selection Setting #...
- Page 8 If installing with a SENSEI™ model, continue to Section 3 for instructions. Install the Rinnai Tankless Water Heater according to the Rinnai Tankless WARNING Water Heater Installation and Operation Manual. The water heater must be electrically grounded in accordance with local codes and ordinances or, in the absence of local codes, in accordance with the National Electrical Code, ANSI/NFPA No.
- Page 9 GTK03U connection into it. Push in Tab to Remove Cap Tankless Connections GTK03U Connections Mated Together 6. Connect the ground wire to the body of the tankless water heater. Ground Wire Rinnai Circ-Logic with Grundfos GTK03 Kit...
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Page 10: Risk Of Electric Shock
Red (R) Black (Bk) Housing (Circ-Logic) with fuse Neutral Blue (Bl) White (W) (Circ-Logic) Wire to tankless water *Connect ground to heater Ground Green (Gn) body of the tankless water heater GTK03U Pump Figure 3 Rinnai Circ-Logic with Grundfos GTK03 Kit... - Page 11 Comfort Mode and Comfort or Economy Mode. Pump recirculation begins when the water heater is turned on. The Rinnai inlet and outlet thermistors measure the water temperature. If the inlet thermistor detects abnormal temperature, then diagnostic code 51 is generated and the pump will turn off.
- Page 12 Condensate Drain Line Gas Supply GTK03U Pump Check Valve Cold Water Supply 3/4 in. Return Line Recommended Expansion Tank Hot Water Outlets Figure 5 Rinnai Circ-Logic with Grundfos GTK03 Kit...
- Page 13 It is the responsibility of the engineer or contractor to ensure that the installation is in accordance with all local building codes. Confer with local building officials before installation. Rinnai Circ-Logic with Grundfos GTK03 Kit...
- Page 14 For this application: • Reference Rinnai Circ-Logic Guide for Rinnai Circ-Logic description, sizing and installation instructions. • Pump should be of bronze or stainless steel construction. • PVA to remain at factory default setting. Circulation unit should not be connected electronically to MSB Controller or EZConnect™...