Installation Manual

Rinnai Tankless Rack System (TRS) Installation Manual 53
Connect Water Heaters
12
OUT
IN
OUT
Cascade
Cable
With use of cascade cable(s) (oponal accessory purchased separately) 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  (8 m)
OR
• Cable Length: 10  (3 m)
• One cable required for each
water heater.
• Includes 1 cable and 2 cascade jumpers.
Primary
Secondary 1
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
IN
Cascade
Jumper
Cascade
Jumper
Accessory
Port
Location
Cascade IN
Cascade OUT
Cascade Cable Assembly