Installation Sheet

42 Rinnai Tankless Water Heater Installaon and Operaon Manual
OUT
IN
OUT
Cascade
Cable
With use of cascade cable(s) up to 24 water heaters can be electronically connected. This connecon will rotate water
heater operaon order to ensure equal usage among the enre system and enables all water heaters connected to
modulate operaon and funcon as one hot water source.
Cascade Cable Required:
• Cable length: 26 ft (8 m)
OR
• Cable Length:10 ft (3 m)
• One cable required for
each water heater.
• Includes 1 cable and 2 cascade jumpers.
Primary
Secondary 1
NOTE: For proper operaon, do not combine dierent
models with cascade communicaon.
1. Connect one end of the Cascade Cable to the “Cascade
OUT” accessory port on the PCB.
2. Connect the other end of the cascade cable to the
“Cascade IN” accessory port on the PCB of the next
water heater.
3. Repeat steps 1 and 2 for each subsequent water
heater in the system.
4. Connect the “Cascade Jumper” (Included with the
cascade cable) to the open accessory ports.
5. Proceed to “Programing Cascade Communicaon” on
the following page.
Primary
PCB
Secondary 1
PCB
Secondary 2
-23
Secondary 2
PCB
Accessory
Port
Locaon
Cascade IN
Cascade OUT
IN
Cascade
Jumper
Cascade
Jumper
Cascade Cable Assembly
Connecng Mulple Water Heaters (Cascade Communicaon)