Rinnai CU199i - Page 43

Rinnai Tankless Water Heater Installaon and Operaon Manual 43
SETTING
#
SETTING
DESCRIPTION
SELECTION
A c E F
08
Cascade Secondary (1-23) Primary
09
Units in Standby
(Cascade)
1 2 3 4 5 6
Parameter Sengs (Cascade Communicaon)
Refer to the parameter seng secon of this manual for instrucons on how to access and change parameter sengs.
08 Cascade:
Primary: Select the water heater intended to be the Primary water heater for cascade communicaon. Set the
parameter seng for this water heater to “Primary” (08 ).
NOTE: Controller will display the set temperature for the system.
Secondary: Factory Default seng for each water heater is set to “Secondary”. Parameter adjustment is only
needed on the water heater idened as “Primary”.
NOTE: Controller will display “- - -”.
09 Units in Standby:
Adjust the parameter seng of the primary unit to set the number of water heaters in standby. Standby units
will maintain operaon with the water ow control valve in the open posion. The remaining water heaters will
maintain the water ow control valve in the closed posion.
Seng Secondary ID
Aer idenfying the “Primary” water heater in the
parameter sengs, set the Secondary ID for all re-
maining water heater in the system by pressing the
“On/O” buon on the controller.
When ID seng is successful, the controller display
will change from “- - -” to the newly set ID number.
140 -01
-02
-03
Secondary 01
Primary Water
Heater
Secondary 02 Secondary 03
Idenfy Secondary ID by pressing
“On/O”
Programming Cascade Communicaon