Watts W100F - Manual (Page 41)

Page 0 WS1TC & WS1.25 TC Manual WS1TC & WS1.25 TC Manual Page 1
Mixing Valve
The mixing valve is installed on the outlet side of the control valve. The mixing valve is used to blend raw water with treated water.
To adjust the blended water, close the mixing valve. Open a water faucet to the desired flow rate. Open the mixing valve until the
desired hardness is reached. Close the faucet.
Note: The use of the mixing valve requires modification to the valve body. These modifications should not be done in the field.
Bypass Valve
The working parts of the bypass valve are the rotor assemblies that are contained under the bypass valve caps. Before working on
the rotors, make sure the system is depressurized. Turn the red arrow-shaped handles towards the center of the bypass valve and
back several times to ensure rotor is turning freely.
The nuts and caps are designed to be unscrewed or tightened by hand. If necessary a pliers can be used to unscrew the nut or cap.
Do not use a pipe wrench to tighten or loosen nuts or caps. Do not place screwdriver in slots on caps and/or tap with a hammer.
To access the rotor, unscrew the cap and lift the cap, rotor and handle out as one unit. Twisting the unit as you pull it out will help
to remove it more easily. There are three o-rings: one under the rotor cap, one on the rotor stem and the rotor seal. Replace worn
o-rings. Clean rotor. Reinstall rotor.
When reinstalling the red arrow handles be sure that:
1. The handle pointers are lined up with the control valve body arrows, and the rotor seal o-ring and retainer on both rotors
face to the right when being viewed from the front of the control valve; or
2. Arrows point toward each other in the bypass position.
Since the handles can be pulled off, they could be accidentally reinstalled 180
°
from their correct orientation. To install the red
arrow handles correctly, keep the handles pointed in the same direction as the arrows engraved on the control valve body while
tightening the bypass valve caps.
After completing any valve maintenance, press and hold SET HOUR and DOWN buttons for 3 seconds or unplug power source jack
(black wire) from the circuit board and plug back in. This resets the electronics and establishes the service piston position.