Rinnai SE Series Installation Manual page 45

5. Install the flex line assembly from step 3 onto the RUR98 unit.

For TRW02ST racks, the conversion is now complete.
IMPORTANT: When conversion steps are complete, the water heater recirculation settings must be
adjusted. Refer to the ―Cross Over Mode‖ section in the ―Rinnai Direct Vent Tankless Water Heater
with Integrated Pump Installation and Operation Manual‖ (shipped with KBP water heater models) for
detailed instructions (Installation Instructions ► Recirculation Modes ► Cross Over Mode).

For TRW03ST racks, a PVA valve and threaded nipple (supplied in Kit 104000278)
must be added to the cold flex line assembly on the second RUC98. See the next step
for detailed instructions.
6. Remove the cold flex line from the second RUC98 unit.
RUR98
RUC98
RUR98
RUC98
RUC98
RUC98
45
Flex line assembly
PVA
Valve
Cold Flex Line
Rinnai Rack Installation
Threaded
Nipple