Table Of Contents; Benefits Of Circ-Logic; Rinnai Water Heaters That Incorporate Circ-Logic - Rinnai Circ-Logic Series Manual

Table of Contents

Benefits of Circ-Logic™ ...................................... 2
Rinnai Water Heaters that
Incorporate Circ-Logic™ ..................................... 2
Kit Contents ....................................................... 3
Disclaimers ......................................................... 3
Rinnai Circ-Logic™ Description .......................... 4
Pipe Length ........................................................ 5
System Drawings ................................................ 5

Benefits of Circ-Logic™:

Energy Efficiency:
Greater Comfort:
Improved Durability: By reducing overall cycle frequency, Circ-Logic™ helps to limit wear on the internal

Rinnai Water Heaters that Incorporate Circ-Logic™

The table below indicates the beginning serial number for each model that has the Circ-Logic™ feature.
Model
RL75i (VC)
RL75e (VC)
RL94i (VC)
RL94e (VC)
RU98i
RU98e
RU80i
RU80e
Circ-Logic™ enables the homeowner to use the Economy Mode and thus cycle the
pump less often, using less energy to maintain loop temperature.
If desired, the Comfort Mode can be used to re-heat the circulation loop more fre-
quently and thus ensure the temperature remains high, even in high-heat loss loops.
workings of the tankless unit. With the Grundfos GTK15 kit, wear and tear is further
minimized because the system is only active when you want it to be.
Serial Number
Units with an "(A)" on the end of the part
number.
DB.CA-016788 and higher
DC.BA-013335 and higher
DB.BA-006175 and higher
DB.BA-006213 and higher
DB.BA-006201 and higher
DB.BA-006195 and higher
Pump Installation ............................................... 7
Wiring Pump to the Water Heater ..................... 8
Timer Technical Data ........................................ 10
Timer Technical Application ............................. 10
Timer Operation ............................................... 10
Troubleshooting ............................................... 11
Sequence of Operation .................................... 11
Part Number
REU-VC2528FFUD-US(A)
REU-VC2528WD-US(A)
REU-VC2837FFUD-US
REU-VC2837WD-US
REU-KB3237FFUD-US
REU-KB3237WD-US
REU-KB2530FFUD-US
REU-KB2530WD-US
2 Rinnai Circ-Logic™ with Grundfos Kit