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VEZ-41/44 Series, 2-Way/3-Way, NPT, Pneumatic Zone Control Valves 1 Installation Guide

Installation Guide

2-Way/3-Way, NPT, Pneumatic Zone Control Valves

VCZ-41/44 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2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-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.

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).

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.

1a.Toremoveanexistingactuator,disconnectthe

airsupply,turntheringnut(couplingpiece)

counterclockwiseuntilitisloose,andpullothe

actuator.

1b.Foranewassembly,REMOVEtheblackplastic

aachmentsupportringfromthevalvebody

usingascrewdriverorpliers.(Itisonlyusedwith

electronicactuators.)

CAUTION

For proper function, the black plastic actuator

attachment support ring must be REMOVED from

the top of the valve bonnet before mounting the

actuator.

Mounting Actuator on Valve Body

Two-Way VCZ-41 Series Three-Way VCZ-44 Series

CAUTION

Pneumatic devices must be supplied with clean, dry

control air. Any other medium (e.g., oil or moisture

contamination) may cause the device to fail.

1/8" NPT

Air Connection

Ring Nut to

Valve Body

Mounting Actuator on Valve Body

REMOVE Black

Plastic Attachment

Support Ring

if Present

NOTE: OnlyMCP-6101/6102actuatorsare

compatiblewiththesevalvebodies.Older

MCP-6001/6002actuatorsarenot.

2. Placetheactuatorontopofthevalvebodyand

rmlyhand-tighten(only)theringnut.

Summary of content (3 pages)

PAGE 1
2-Way/3-Way, NPT, Pneumatic Zone Control Valves VCZ-41/44 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 2 for 3-way mixing or diverting applications). UP 3. Mount the valve so the actuator is positioned over valve.
PAGE 2
Connection Connect the main air supply (30 psi max.) to the 1/8" NPT port on the top of the actuator. 1/8" NPT Air Connection Ring Nut to Valve Body 3-Way Valve Applications 2 1 REMOVE Black Plastic Attachment The three-way VCZ-44 zone valves are diverting Support Ring valves. However, they may be used as mixing valves if Present Diverting Mixing As the valve stem moves downward, the flow through VCZ-44 ports AB-A decreases and the flow through ports AB-B increases.
PAGE 3
Operation Select Specifications After the mechanical and pneumatic installations have been completed, cycle the actuator to verify proper operation. (See the data sheet for additional specifications.) General Mounting Location NEMA 1 (interior only) Troubleshooting If the actuator does not fit properly on the valve body during installation or the valve performs improperly (e.g.