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TRW ST Series Dedicated Return Plumbing Instructions
All TRW ST Series racks are set up for a dedicated recirculation return line. A single return line will connect to the
RUR98 unit above the cold isolation valve as shown in the below schematic. For the TRW03ST with multiple RUC98
units, the units must be connected using an EZconnect cable.
Dedicated return line connection
3/4‖ FNPT
Unscrew the square head threaded plug
to connect the building dedicated recircu-
lation return line.
WARNING: Make sure the water supply
is off and the system is depressurized.
RUR98
42
EZconnect cable
RUC98
Rinnai Rack Installation
RUC98
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