KMC Controls VEZ-4x Series - Manual

VEZ-4x Series, 2-Way/3-Way, NPT Zone Control Valves (1/2 to 1") 1 Installation Guide
Installation Guide
2-Way/3-Way, NPT, Zone Control Valves ( 1 ⁄
2
to 1")
VEZ-4x Series
Mounting Valve Body
1. Clean the lines upstream from the valve. Remove
any debris larger than 0.06" (0.015 mm).
2. Align the valve’s flow indicator with the system
flow (see page 4 for 3-way mixing or diverting
applications).
3. Mount the valve so the actuator is positioned over
valve.
CAUTION
To prevent condensation from dripping onto the
actuator housing, mount the valve with the actuator
in the upright position or, at most, at a 45° angle.
4. Seal valves with approved pipe sealant.
5. Using two wrenches, secure the valve to the pipe.
Torque should not exceed 75 ft-lbs. (102 N
•
m).
6. Eliminate air from the system to keep the valves
full of fluid during operation.
NOTE: If the system experiences large amounts of
debris, steps should be taken to keep the
system clean.
Mounting Valve Body 1
Mounting Actuator on Valve Body 1
Wiring 2
Two-Position Spring Return 2
Proportional and Tri-State 2
Manual Override 3
Proportional and Tri-State 3
Two-Position Spring Return 3
Operation 4
Maintenance 4
Select Specifications 4
More Information 4
Important Notices 4
UP
CAUTION
Using mineral oil lubricants or other incompatible
substances in system fluids may damage EPDM
rubber seals in valves. Before using any lubricant or
additive in a water or ethylene glycol base, consult
the substance manufacturer for compatibility with
EPDM (Ethylene Propylene Diene Monomer).
2-Way with Tri-State or
Proportional Actuator
3-Way with 2-Position
Fail-Safe Actuator
1
2
Mounting Actuator on Valve Body
Ring Nut to
Valve Body
Black Plastic
Attachment
Support Ring
CAUTION
If mounting the actuator to a valve already in-line,
close the shut-off valves in the piping (upstream
first, then downstream) or switch off the pump to
allow the differential pressure in the valve to drop.
1. To remove an existing actuator, disconnect
the wiring, turn the ring nut (coupling piece)
counterclockwise until it is loose, and pull off the
actuator.
CAUTION
The black plastic actuator attachment support ring
must be in place on top of the valve bonnet before
mounting the actuator or damage to the actuator
connection may result.
2a. For NO actuators (“A,”“M,” and “P”), place the
actuator on top of the valve body and firmly
hand-tighten (only) the ring nut.
NOTE: The last digit of valve model number
represents the type of actuator.
Mounting Actuator on Valve Body
2b. For NC actuators (“B,”“F,” “N,” and “Q”),
manually rotate and latch open the actuator (or
proper valve close-off may be affected). See the
Manual Override section on page 3. Then place
the actuator on top of the valve body, firmly
hand-tighten (only) the ring nut, and return the
actuator to its normal position.