KMC Controls VEZ-4x Series - Manual (Page 3)

VEZ-4x Series, 2-Way/3-Way, NPT Zone Control Valves (1/2 to 1") 3 Installation Guide
(A) Allow handle to turn counterclockwise
to extend spindle and close valve (AB-B).
(B) Turn handle clockwise to retract spindle
and open valve (AB-A).
B A
B
A
B A
(A) Allow handle to turn counterclockwise
to retract spindle and open valve (AB-A).
(B) Turn handle clockwise to extend spindle
and close valve (AB-B).
B A
B
A
Fail-Safe (Spring Return)
Actuator “M” MEP-3503 (NO or Fail AB-A)
Actuator “P” MEP-3504 (NO or Fail AB-A)
Fail-Safe (Spring Return)
Actuator “N” MEP-3501 (NC or Fail AB-B)
Actuator “Q” MEP-3502 (NC or Fail AB-B)
B A
B
A
3 mm
B A
B
A
3 mm
(A) Turn the hex wrench clockwise and the
spindle extends (2-way valve closes).
(B) Turn the hex wrench
counterclockwise and the
spindle retracts (2-way valve opens).
Proportional Actuator “B”
MEP-3511
(NC or Fail-in-Place)
Proportional Actuator “A”
MEP-3516
(NO or Fail-in-Place)
(B) Turn the hex wrench clockwise and the
spindle extends (2-way valve closes).
(A) Turn the hex wrench counterclockwise and the
spindle retracts (2-way valve opens).
Tri-State Actuator “F”
MEP-3510
Manual Override
For manual positioning, turn off power to the actua-
tor, rotate the manual override handle clockwise
180°, and squeeze the handle to latch it around the
protruding stop. (The actuator will automatically
unlatch when power is applied.)
The “0” and “1” positions on the housing are for
reference only and are not for stroke measurement.
CAUTION
To avoid damaging the actuator, do not manually
assist the spring return as it returns to its home
position.
Two-Position Spring Return Proportional and Tri-State
For manual positioning, turn off power to the actua-
tor and use a 3 mm hex wrench to rotate the actuator.
The actuator will maintain its position until power is
restored and a control signal is applied.
Cycling the power off and then back on recalibrates
the actuator.
The “0” and “1” positions on the housing are for
reference only and are not for stroke measurement.