Table of Contents
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Rinnai Circ-Logic™
With Grundfos GTK15 Kit
Description
Rinnai Circ-Logic™ offers homeowners
enhanced convenience and energy
efficiency in home hot water recirculation
systems with a dedicated return line. Circ-
Logic™ controls the on/off sequence and
operational cycles of the recirculation pump
through the programming of the tankless
water heater's control board. This feature is
standard on Rinnai's Ultra and Luxury Series
units.
Circ-Logic™ has been designed to provide
homeowners with the ability to customize
their recirculation systems based on such
key variables as length of recirculation loop,
piping insulation, and the homeowner's
comfort and efficiency preferences.
The GTK15 kit, manufactured by Grundfos,
allows the user to enjoy further energy
savings through the use of a timer.
For specific information on warranty with
circulation, please visit
http://www.rinnai.us/warranty
100000284 Rev D
1
Rinnai Circ-Logic™ with Grundfos Kit
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Table of Contents
Related Manuals for Rinnai Circ-Logic Series
Summary of Contents for Rinnai Circ-Logic Series
- Page 1 Logic™ controls the on/off sequence and operational cycles of the recirculation pump through the programming of the tankless water heater's control board. This feature is standard on Rinnai's Ultra and Luxury Series units. Circ-Logic™ has been designed to provide homeowners with the ability to customize...
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Page 2: Table Of Contents
With the Grundfos GTK15 kit, wear and tear is further minimized because the system is only active when you want it to be. Rinnai Water Heaters that Incorporate Circ-Logic™ The table below indicates the beginning serial number for each model that has the Circ-Logic™ feature. -
Page 3: Kit Contents
Rinnai Circ-Logic™ Manual Disclaimers: • Pump must be installed in accordance with Rinnai installation instructions when Circ-Logic™ is used. • This document is intended to be used as a guide only and not as a replacement for a professionally engi- neered project. -
Page 4: Rinnai Circ-Logic™ Description
How It Works Typical Pump ON Rinnai Intervals* DIP switches (SW2 - white switches, #4, #8) should be set Temperature (minutes) correctly for recirculation and mode. The Rinnai water heater Setting should be turned on. Economy Comfort °F Mode Mode Pump recirculation begins when the water heater is turned on. -
Page 5: Pipe Length
[1] The Equivalent Pipe Length includes supply piping, return piping, and fittings. The Installer/Contractor/ Engineer must calculate the total equivalent pipe length of the piping system. System Drawings Figure 1: Recirculation using One Rinnai Water Heater Rinnai Circ-Logic™ with Grundfos Kit... - Page 6 Figure 2: Recirculation using Two Rinnai Water Heaters Rinnai Circ-Logic™ with Grundfos Kit...
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Page 7: Pump Installation
The pump must be installed with the motor shaft positioned horizontally. Under no circumstances should the pump be installed with the shaft vertical or where the shaft falls below the horizontal plane. See Figure 3B. Rinnai Circ-Logic™ with Grundfos Kit... -
Page 8: Wiring Pump To The Water Heater
Figure 5. Follow Electrical Code and pump manufacturers recommendations. The Rinnai water heater has the ability to control a 8. Adjust the dip switch in the water heater by recirculation pump. Two modes are available,... - Page 9 The Grundfos GTK15 Pump has two power sources. Disconnect all supply connections before servicing. One is directly from the electrical outlet for the timer and the other is through the water heater for the pump. Rinnai Circ-Logic™ with Grundfos Kit...
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Page 10: Timer Technical Data
After power has been restored, the correct time of day must be reset by rotating the programming ring in the direction of the arrow until the timing arrow points to the actual time on the ring. Programming Tabs Rinnai Circ-Logic™ with Grundfos Kit... -
Page 11: Troubleshooting
(See Figure 8) Sequence of Operations Flowchart Figure 8 NOTE The isolation valves are to be field supplied. This image is just for illustration purposes only. For technical assistance, please contact Rinnai at 1-866-RINNAI1 (746-6241). Rinnai Circ-Logic™ with Grundfos Kit... - Page 12 L-UP-TL-R04 100000284 Rev D Rinnai Circ-Logic™ with Grundfos Kit...
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