Installation Manual

Rinnai Tankless Rack System (TRS) Installation Manual 47
IMPORTANT: This secon is only for TRW02ST and TRW03ST rack models
ulizing a dedicated recirculaon return line in the plumbing system.
All TRW02ST and TRW03ST racks are shipped congured for a dedicated
recirculaon return line. A single return line will connect to the RUR199 unit
below the cold isolaon valve as shown in the below schemac. Using an
EZConnect cable, connect the primary unit (RUR199) to a secondary unit
(RU199).
For the TRW03ST model with mulple RU199 units, the second RU199 must
ulize a Pressure Acvated Valve.
Dedicated return line connecon
3/4” FNPT
Unscrew the square head threaded plug
to connect the building dedicated
recirculaon return line.
WARNING: Make sure the water supply is
o and the system is depressurized.
RUR199
(Primary)
RU199
(Secondary)
RU199
Units Connected with
EZConnect Cable
Installed with a
Pressure
Activated Valve
Congure TRW02ST and TRW03ST Racks for
Dedicated Mode (Dedicated Recirculaon
Return Line)