Installation Manual
Rinnai Tankless Rack System (TRS) Installation Manual     51 
Follow the steps below to remove the bypass plug and replace it with the bypass lter (packaged with the Thermal 
Bypass Valve). 
Assemble threaded cap and Bypass lter assembly 
to the hot water outlet at the base of each water 
heater. 
1  
2  
3  
Configure TRW02ST and TRW03ST Racks for Crossover Mode (Thermal Bypass Valve) (Continued) 
Plug/Filter Assembly (Crossover Mode) 
4 
Remove threaded cap and Bypass Plug 
assembly from the hot water outlet at the base 
of each water heater. 
Remove Bypass Plug from the threaded cap. 
Assemble bypass lter to the threaded cap. 
Do not discard bypass plug. Keep in safe place in case system is 
changed from Crossover Mode to Dedicated Mode. 
              IMPORTANT 
Bypass Plug Assembly 










