ESIE09-08A 3-Way Valve
Appendix 275
7.3 How to Verify If 3-Way Valve is Installed Correctly
Caution Switch off power before working on the unit but make sure the valve motor is not moving.
Separate the 3-way
valve motor from
the body
1. Check the installed motor position.
A. Middle position (= factory position, in case no
power has been applied to the valve yet)
B. Left position (= space heating)
C. Right position (= domestic hot water)
Be sure the knob is pushed in completely.
2. Remove the knob without changing the position.
3. Unscrew the motor from the body. Watch out for
not losing the screw.
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