Rinnai Control-R User manual

Recirculaon with On-Demand Accessories User Guide 1
ENGLISH

Recirculaon with On-Demand Accessories User Guide
2
This manual provides detailed informaon on Rinnai’s on-demand
recirculaon accessories; it is designed for eld installers and is a
supplement to the Control-R™ Wi-Fi Module Installaon Manual
(supplied inside module package).
1 What is Recirculaon?.....................................3
Recirculaon Components ........................................ 3
Tankless Water Heaters with Circ-Logic.................... 4
How On-Demand Recirculaon Works.................... 5
Recirculaon with a Dedicated Return Line............. 8
Recirculaon with a Crossover Valve ................... 11
2 Let’s Get Started ........................................... 12
Step 1: Install Module.......................................... 12
Step 2: Connect Module to Water Heater and
Congure Sengs ...................................... 12
Step 2A: SENSEI™ Models .................. 13
Step 2B: Non-SENSEI™ Models........... 23
Step 3: Tesng Accessories with Circ-Logic............. 31
3Installaon Tips ............................................ 32
4Frequently Asked Quesons ......................... 33
Appendix A: Install the Module on a Wall ...........36
Appendix B: Addional Parameter Sengs.........38

Recirculaon with On-Demand Accessories User Guide 3
Circ-Logic is Rinnai’s recirculaon technology built into Rinnai Tankless
Water Heaters. Circ-Logic denes recirculaon paerns that coincide
with your hot water usage. Hot water is available when and where you
want it with the on-demand recirculaon components listed below.
Mounts in a convenient locaon, such as a kitchen
faucet or bathroom sink and operates the recirculaon
system by pushing the buon.
Mounts ush to the wall or in the corner and operates the
recirculaon system with the detecon of moon.
Turns o recirculaon and is available for purchase if
required by local building codes.
Start recirculaon with a simple voice
command with Amazon Alexa or Google Home.
Amazon, Alexa and all related logos are trademarks of Amazon.com,
Inc. or its aliates. Google Home is a trademark of Google LLC.
Once connected and the Rinnai app is downloaded, the
Rinnai Tankless Water Heater can be controlled from the
user’s smart phone or tablet.

Recirculaon with On-Demand Accessories User Guide
4
Models with Recirculaon Capability
With
Internal Pump
Without
Internal Pump
Circ-Logic is included in Rinnai’s
SE+ Series featuring Therma-
Circ360™ models (Super High
Eciency Plus RUR Models):
• RUR98i/e
• RUR160i/e
• RUR199i/e
Included in these models are an
internal recirculaon pump and
crossover valve.
The following models include Circ-
Logic, but require installaon of
an external recirculaon pump
(purchased separately):
• RLX94i
• RL75i/e (VC)
• RL94i/e (VC)
• RU80i/RUC80i and RU80e
• RU90e/RUC90i
• RU98i/RUC98i and RU98e
SENSEI™ Models:
• CU199i/e (Commercial)
• CU160i/e (Commercial)
• RU199i/e (Residenal)
• RU180i/e (Residenal)
• RU160i/e (Residenal)
• RU130i/e (Residenal)
Example image

Recirculaon with On-Demand Accessories User Guide 5
The on-demand accessory is acvated (push buon is pressed,
moon sensor acvated, etc.)
A request (not a command) is sent to the water heater to turn on
the pump. In other words, the push buon or moon sensor is
asking the water heater if the pump can turn on to start
recirculaon.
With built-in Circ-Logic, the water heater decides (based on me
intervals and current water temperature) if the pump can turn
on. The water heater either ignores or accepts the request from
the recirculaon accessory.
If the water heater accepts the request to start recirculaon, the
pump turns on and runs for ve minutes or unl the water
temperature is reached (whichever occurs rst).
Aer recirculaon completes, the pump enters into a mandatory
dormant (inacve) state. During this me, the pump will not
turn on for any reason, even if the push buon or moon
sensor is acvated.
The pump remains dormant for the congured me intervals.
See Visual Illustraon on Next Page

Recirculaon with On-Demand Accessories User Guide
6
IF REQUEST IS
ACCEPTED
SENDS
REQUEST
CAN THE
PUMP TURN ON?
Circ-Logic decides if the pump will turn on (based on congured me intervals and current water temperature). WATER HEATER IGNORES OR ACCEPTS REQUEST
Pump turns on and runs for 5 minutes or unl water temperature is reached (whichever occurs rst).
Pump turns o and enters into a mandatory dormant (inacve) state. DURING THIS TIME, THE PUMP WILL NOT TURN ON FOR ANY REASON, EVEN IF THE PUSH BUTTON IS PRESSED The pump remains dormant for the congured me intervals.
PUMP ON
5 MIN. PUMP OFF
15 MIN.*
Push buon is pressed.
On-Demand Recirculation Example
* 15 Minutes is an example me frame and is for illustrave purposes only.
RECIRCULATION
CYCLE COMPLETE

Recirculaon with On-Demand Accessories User Guide 7
IMPORTANT: If an on-demand request is made while the
pump is dormant, the pump WILL NOT turn back on.
The ON signal is sll sent to the water heater for a 5-minute mer. If
the dormant period completes with me available on the Control-R™
mer, the pump will acvate for those remaining minutes (see
example below).
5-minute recirculaon mer aer the
on-demand accessory is acvated.
Interval when the on-demand
accessory is acvated.

Recirculaon with On-Demand Accessories User Guide
8
Pump OFF intervals (the amount of me the pump stays o) are
dierent for RUR models and non-RUR models:
• RUR models include an integrated recirculaon pump
• Non-RUR models that are equipped with Circ-Logic require
installaon of an external recirculaon pump
Rinnai Temperature
Seng °F
Typical Pump OFF Intervals (Minutes)
Economy Mode Comfort Mode
140 18 9
135 20 10
22 11
130
125 24 12
120 28 14
115 32 16
110 38 19
108 40 20
106 44 22
104 48 24
102 52 26
100 56 28
98 62 31
RUR Models (Include Internal Recirculaon Pump)

Recirculaon with On-Demand Accessories User Guide 9
• The push buon or moon sensor is acvated.
• If the water heater accepts the request, the pump runs for ve minutes
(or unl the water temperature is reached) and then turns o.
• The pump remains o in its mandatory dormant (inacve) state for 24
minutes in Comfort mode.
If using a dedicated return line, set the dip switches as outlined in the
Tankless water heater Installaon and Operaon Manual.
Note: Instead of dip switches, SENSEI™ units have parameter sengs.
Temperature Economy Comfort
104 48 24
Comfort mode is recommended with on-demand recirculaon
accessories as it cycles the pump more frequently, ensuring the loop
temperature remains higher.
1234512345
1—24 Minutes
Pump ON
5 Min.
Pump OFF
24 Min.
Pump runs for 5 minutes or unl water temperature
is reached (whichever occurs rst).
Pump ON
5 Min.
Pump WILL NOT turn on
TIP
IMPORTANT
If a push buon or moon sensor is acvated during
the mandatory dormant (inacve) state, the pump
WILL NOT turn back on.
• Aer 24 minutes, the push buon or moon sensor may be
acvated to turn on the pump.

Recirculaon with On-Demand Accessories User Guide
10
Rinnai Temperature
Seng °F
Typical Pump OFF Intervals (Minutes)
Economy Mode Comfort Mode
140 31 15
135 31 15
31 15
130
125 31 15
120 31 15
115 35 18
110 42 21
108 45 22
106 49 24
104 54 27
102 60 30
100 68 34
98 79 39
Non-RUR Models (External Recirculaon Pump Required)