Rinnai REP199i Installation And Operation Manual page 53

5.7. 1 ThermaCirc360™ Recirculation (Determine
Recirculation Mode)
Two recirculation modes are available:
DEDICATED MODE
Cold Water
Figure 80
Dedicated mode (factory default) - Home
includes a dedicated circulation return line in the
plumbing system. The water heater is shipped
configured for the Dedicated Recirculation Line
mode.
General Guidelines
• For the licensed installer / professional
• For installation in commercial and residen-
tial domestic hot water applications only.
• Rinnai strongly recommends installing
insulation to the hot water and dedicated
return lines to decrease the amount of
heat loss.
Rinnai Tankless Water Heater Installation and Operation Manual
Hot Water
CROSSOVER MODE
Figure 81
Crossover mode - Home does not include
a dedicated circulation return line. Requires
installation of a thermal bypass valve
(purchased separately) at the furthest fixture in
the plumbing system.
• DO NOT install in combination with
hydronic heating applications.
• DO NOT electronically manifold (MSB
/ EZConnect™) multiple REP units
together.
• DO NOT install the MC-195T-US Timer/
Controller and control•r™ Wi-Fi Module
together as they are not compatible
accessories.
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