Rinnai Sensei CU199i Installation And Operation Manual page 53

Programming Cascade Communication
Parameter Settings (Cascade Communication)
Refer to the parameter setting section of this manual for instructions on how to access and change
parameter settings.
Table 24
Setting #
Description
08
Units in Standby
09
(Cascade)
08 Cascade:
Primary: Select the water heater intended to be the Primary water heater for cascade communication.
Set the parameter setting for this water heater to "Primary" (08B).
NOTE: Controller will display the set temperature for the system.
Secondary: Factory Default setting for each water heater is set to "Secondary". Parameter adjustment is
only needed on the water heater identified as "Primary".
NOTE: Controller will display "- - -".
09 Units in Standby:
Adjust the parameter setting of the primary unit to set the number of water heaters in standby. Standby
units will maintain operation with the water flow control valve in the open position. The remaining water
heaters will maintain the water flow control valve in the closed position.
Setting Secondary ID
After identifying the "Primary" water heater in
the parameter settings, set the Secondary ID
for all remaining water heater in the system by
pressing the "On/Off" button on the controller.
When ID setting is successful, the controller
display will change from "- - -" to the newly set
ID number.
Rinnai Tankless Water Heater Installation and Operation Manual
Setting
A
Cascade Secondary
(2-23)
1
Selection
B C
Primary
2 3
140 -01
Secondary 01 Secondary 02 Secondary 03
Primary water
heater
Identify Secondary ID by
Figure 55
D E
4 5
-02 -03
pressing "On/Off"
F
6
53