Installation Manual

46 Rinnai Tankless Rack System (TRS) Installation Manual
Configuring TRW02ST and
TRW03ST Rack Models
11
This Secon is Applicable for TRW02ST and TRW03ST Rack Models Only
TRW02ST and TRW03ST rack models are designed for the SE+ Featuring ThermaCirc360™ tankless water heaters,
which include a built-in recirculaon pump and two recirculaon modes:
CROSSOVER MODE
(Factory Default) Home/
business includes a
dedicated circulaon return
line in the plumbing
system. All TRW02ST and
TRW03ST rack models and
the RUR199 Tankless Water
Heater are shipped
congured for a dedicated
recirculaon return line.
Home/business does not
include a dedicated circulaon
return line. Requires
installaon of a thermal bypass
valve (included with purchase)
at the furthest xture in the
plumbing system.
DEDICATED MODE
DO NOT install in combinaon with hydronic
heang applicaons.
DO NOT install the MC-195T-US Timer/Controller
and Control-R™ Wi-Fi Module together as they
are not compable accessories.
• For the licensed installer / professional
• For installaon in residenal domesc hot water
applicaons only.
• Rinnai strongly recommends installing insulaon
to the hot water and dedicated return lines to
decrease the amount of heat loss.
General Guidelines
Water drain plug
Condensate drain line
Gas connecon
Cold water inlet with lter
Hot water outlet with
bypass plug / lter
Check valve drain plug
Condensate trap
drain plug
PRV Connecon
Thermal bypass
valve
See the following secon for Crossover Mode
instrucons: Congure TRW02ST and TRW03ST Racks
For Crossover Mode (Thermal Bypass Valve)
See the following secon for Dedicated Mode in-
strucons: Congure TRW02ST and TRW03ST Racks
For Dedicated Mode (Dedicated Recirculaon Return
Line)
Connection Diagram