Rinnai RUC80i Training Program page 36

WFSV & Bypass Valve Removal - RUR Models.
The water flow servo valve (WFSV) and bypass valve on the RUR models are the same
components found on the RU/RUC and C199 models but an internal check valve assembly has
been added at the bottom to accommodate the built-in circulation pump.
Water Flow Servo Valve
and Bypass Valve.
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PROPRIETARY and CONFIDENTIAL
Enhancing Lives By Changing The Way Water Is Heated
The steps to remove the water flow servo
valve/bypass valve assembly from the RUR
models will be covered in the next few slides.
Maintenance on this assembly and water flow
turbine are the same as outlined in the
previous slides with the exception that the
internal check valve assembly will need to be
removed from the bottom of the water flow
servo valve first.
The water flow turbine is not accessible from
the bottom of the water heater as in other
models.
Internal Check Valve Assembly.
36 5/4/2018