ZVM range 3-port spring return mid-position valves The fitting and wiring instructions should be read before fitting the valve Fitting: When connecting to pipe work do not use the actuator for leverage. Valves should be held by wrench flats on body. Place the AUTO/MAN lever in the MAN position when filling, venting or draining the system The valve must be installed with the arrow in the direction of the flow. Failure to do so will result in water hammer and potential premature failure Mounting Options: The valve may be mounted vertically, or horizontally but should not be mounted so that valve head is below the horizontal level of the pipe work Do NOT over tighten Warning: All controls must be earthed.
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