Installation Manual
Rinnai Tankless Rack System (TRS) Installation Manual     29 
Rack Frame - Specifications  
Frame Rail Type 
Sheet Metal  
Frame Material 
Aluminum (0.090 5052-H32)  
Frame Finish 
Powder Coat  
Color 
Gray  
Water & Gas Connections      
Hot Water Trunk Line Diameter 
2-1/2"   2” 
Cold Water Trunk Line Diameter 
2-1/2"   2” 
Hot Water Trunk Line Material 
Rigid Copper  
Cold Water Trunk Line Material 
Rigid Copper  
Water Trunk Connection Type 
2-1/2” PIPE   2” PIPE 
Gas Trunk Line Diameter 
1-1/2"   1-1/4” 
Gas Trunk Connection Type 
1-1/2” MNPT   1-1/4”MNPT 
Gas Trunk Line Material  Sch 40 Steel  
Gas Branch Line Material  PVC Over CSST  
BTU and Flow Rates for CU199i, CU199e (NG/LP) 
Number of Tankless Water Heaters  6   5   3   4  2 
Flow rate @ 70°F rise (gpm)  32.4  27.0  16.2  21.6  10.8 
Flow rate @ 100°F rise (gpm)  22.8  19.0  11.4  15.1  7.6 
Minimum input rate (Btuh)  15,200 
Maximum input rate (Btuh)  1,194,000  995,000  597,000  796,000  398,000 
TRS06CU 
TRS05CU 
TRS03ILCU 
Electric Requirements  
Prewired Electrical Assembly  N/A Yes (Indoor Models Only) 
Voltage  AC 120 Volts - 60 Hz  
Max Current (Amperes)  24  20  16  12  12  8 
TRS36CU 
TRS46CU 
TRS23ILCU 
Condensate Trunk Line Diameter  3/4”  N/A 
Condensate Trunk Line Material  Sch-40 PVC  N/A 
Condensate Trunk Connection Type  3/4” Pipe 
N/A 
6-Unit Free-Standing Frame (Connued) 
Model 
TRS06CU  TRS05CU  TRS46CU  TRS36CU  TRS03ILCU  TRS23ILCU 










