User Guide

ManualsBrandsKMC Controls ManualsDampers3/4" Two-Way Globe Zone Control Valve with Normally Open, Spring Return Actuator, 24 VAC (4.1 Cv)

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 (

⁄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owindicatorwiththesystem

ow(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uid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

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

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o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rmly

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-omaybeaected).Seethe

ManualOverridesectiononpage3.Thenplace

theactuatorontopofthevalvebody,rmly

hand-tighten(only)theringnut,andreturnthe

actuatortoitsnormalposition.

Summary of content (4 pages)

PAGE 1
2-Way/3-Way, NPT, Zone Control Valves (1⁄2 to 1") VEZ-4x Series Installation Guide 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). UP 3. Mount the valve so the actuator is positioned over valve.
PAGE 2
Wiring See the appropriate diagram. NOTE: NOTE: For 24 VAC actuators, use Class 2 transformers. For 24 VAC spring return actuators, connections to the wire leads can be made inside the housing (remove the two screws and pull the housing off to access the interior). All wiring must conform to NEC and local codes and regulations. NOTE: For 120 VAC spring return actuators, the wiring connection requires a junction box and flex conduit.
PAGE 3
Manual Override Proportional and Tri-State Two-Position Spring Return For manual positioning, turn off power to the actuator 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. For manual positioning, turn off power to the actuator, 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.
PAGE 4
Operation More Information After the mechanical and electrical installations have been completed, cycle the actuator to verify the direction of rotation for normal operation and failsafe if so equipped. Maintenance No routine maintenance is required. Each component is designed for dependable, long-term reliability, and performance. Careful installation will also ensure long-term reliability and performance.