Rinnai Sensei N-Series Service Presentation page 4

Product Changes
f. Water Flow Servo:
- Why was the WFSV relocated? Because the surface temperature of the heat exchanger
tubes is higher than with copper. Therefore; local heat is likely to occur at high load /low
water pressure. In order to keep the water pressure inside heat exchanger as high as
possible, the WFSV was relocated.
g. Pressure relief valve:
- Why was the pressure relief valve moved? When the WFSV was relocated there was a
possibility pressure inside the heat exchanger could rise when the WFSV closes.
Therefore; it was necessary to install a pressure relief valve on the upstream side of the
water flow servo valve.
h. Flow Control Turbine:
- Located in by-pass valve – easy to remove from inside unit's cabinet.
i. Stainless Steel Clips throughout unit:
- Eliminated screws – use clips for easier/faster parts removal
© 2015 Rinnai America Corporation
PROPRIETARY and CONFIDENTIAL
Enhancing Lives By Changing The Way Water Is Heated
4 11/6/2018