Vapor Control Valve Installation
FALMOUTH PRODUCTS P.O. BOX 541 FALMOUTH, MA O2541 PHONE 508 548 6686 FAX 508 548 8144
FALMOUTH PRODUCTS VAPOR CONTROL VALVE (VCV)
INSTALLATION INSTRUCTIONS
The Vapor Control Valve (VCV) regulates input vapors to the FALCO oxidizer by mixing source
vapors with dilution air.
The VCV is FM approved for use in Class I, Division 2, Group D Hazardous Locations.
Install the VCV in series in the vapor line after the water knockout with its dilution air filter vertical,
vapor inlet horizontal, and the vapor discharge on the bottom of the valve. The VCV should be
mounted so it can be accessed easily and removed for service. An in-line filter should be installed on
the vacuum side of the blower.
DILUTION AIR FILTER
SOLENOID
VCV VAPOR INLET
3” NPT
BLOWER
FILTER
VCV
WATER
KNOCKOUT
TO VAPOR
SOURCE
VCV OUTLET
3” NPT
BLOWER
BLOWER INLET
(VACUUM SIDE)
Figure 1 - PREFERRED INSTALLATION
CAUTION: If the VCV is installed inside a building or trailer with a ventilation system, the VCV
Dilution Air Filter must be piped to the outside of the building to prevent the building ventilation
system from pulling vapors out of the Dilution Air Filter and into the building when the S.V.E blower
shuts down.
If piping alone is not adequate to support the VCV, the included mounting bracket may be used to
attach the VCV to a fence or wall (Figure 3).
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FALMOUTH PRODUCTS P.O. BOX 541 FALMOUTH, MA O2541 PHONE 508 548 6686 FAX 508 548 8144
It is preferable to locate the VCV between the in-line filter and the blower (Figure 1).
If existing piping restricts the preferred installation, the VCV may be located between the blower filter
and the water knockout (Figure 2).
NOTE: The VCV may require more frequent reconditioning if the VCV inlet is not filtered.
DILUTION AIR FILTER
VCV VAPOR INLET
3” NPT
WATER KNOCKOUT
VCV
TO VAPOR
SOURCE
VCV OUTLET
3” NPT
BLOWER FILTER
BLOWER
BLOWER INLET
(VACUUM SIDE)
Figure 2 - ALTERNATIVE (LESS DESIRABLE) INSTALLATION
BLOWER TESTING
If testing of blower vacuum is required, please do not manually adjust the VCV.
Remove the Dilution Air Filter from the top of the VCV dilution tee, and manually control inlet flow with
a flat plate to reach desired blower vacuum.
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VCV INSTALL MANUAL.docx
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FALMOUTH PRODUCTS P.O. BOX 541 FALMOUTH, MA O2541 PHONE 508 548 6686 FAX 508 548 8144
VCV TEMPORARY INSTALLATION
If a temporary installation is required, the VCV may be mounted to a fence or wall and attached to the
inlet piping using hoses, camlock fittings, pipe tees, and an isolation valve (Figure 3).
VCV ELECTRICAL
CONNECTIONS
MOUNTING
BRACKET
VCV INLET
SVE BLOWER
FLEXIBLE
HOSE
BLOWER INLET
(VACUUM SIDE)
CAMLOCK
FITTINGS
ISOLATION VALVE (CLOSED)
PIPE TEE
TO VAPOR SOURCE
Figure 3 – TEMPORARY INSTALLATION
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VCV INSTALL MANUAL.docx
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FALMOUTH PRODUCTS P.O. BOX 541 FALMOUTH, MA O2541 PHONE 508 548 6686 FAX 508 548 8144
VCV ELECTRICAL INSTALLATION
Install 1/2” rigid conduit with a seal fitting between the FALCO control box and the VCV conduit body.
NOTE: VCV conduit body hubs are ¾”. A ¾ - ½” reducer bushing is required.
Pull seven # 14 gauge wires (two red, one white, one yellow, one brown, one blue, and one green)
through the 1/2” rigid conduit.
In the FALCO control box (lower right hand side), make the following terminations:
Connect the six wires (two red, white, yellow, brown, and blue) to the corresponding terminal blocks:
# 51, 52, 53, 54, 55, and 56. See Figure 4.
Connect the ground wire to the grounding bar in the FALCO control box.
Inside the round VCV conduit body, locate the white, reds, yellow, brown, blue and green wires that
were previously pulled into the box through the 1/2” conduit (Figure 5). Connect these wires to the
corresponding terminal blocks inside the VCV conduit body.
Do not open the PVC VCV enclosure.
Figure 4 – FALCO Control Box
Terminations
Figure 5 - VCV Conduit Body Terminations
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