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Connecting Multiple Water Heaters (Cascade Communication) <br /> With use of cascade cable(s) up to 24 water heaters can be electronically connected. This connection will <br /> rotate water heater operation order to ensure equal usage among the entire system and enables all water <br /> heaters connected to modulate operation and function as one hot water source. <br /> NOTE: For proper operation, do not combine different models with cascade communication. <br /> Cascade Cable Required: _ <br /> • Cable Length: 26 ft. co <br /> (8 m) OR <br /> 3-24 <br /> • Cable Length: 10 ft. <br /> cs <br /> (3 m) 2 � a <br /> 0 <br /> • One cable required I 1 o <br /> for each water Figure 51 <br /> heater. b„o , U <br /> • Includes 1 cable and 2 cascade <br /> jumpers. <br /> Figure 52 Cascade <br /> Cascade Cable Assembly Cable <br /> 1. Connect one end of the Cascade Cable to the <br /> "Cascade OUT" accessory port on the PCB. <br /> 2. Connect the other end of the cascade cable to <br /> the "Cascade IN" accessory port on the PCB Cascade IN <br /> of the next water heater. <br /> 3. Repeat steps 1 and 2 for each subsequent Cascade OUT <br /> water heater in the system. <br /> 4. Connect the"Cascade Jumper" (Included with <br /> the cascade cable)to the open accessory <br /> ports. <br /> 5. Proceed to"Programing Cascade :'�Accessory Port <br /> Communication" on the following page. Location <br /> Figure 53 <br /> Primary Secondary 1 <br /> PCB PCB Secondary 2 <br /> Cascade PCB <br /> Jumper <br /> � � IN <br /> IN <br /> o � � OUT �. <br /> Cascade <br /> Jumper <br /> Figure 54 <br /> Rinnai Tankless Water Heater Installation and Operation Manual 52 <br />