Field Controls FDVS User Manual

ITEMS INCLUDED IN KIT:

FDVS Direct Vent Termination
*VRV-4 Vacuum Relief Valve
Backing Plate
Installation Instruction
Sheet
**Bagged Hardware
**Cover Ring
**Cover Sleeve
**Appliance Adapter
**Adapter Clamp

FIELD DIRECT VENT SYSTEM

Model: FDVS

*Not included in some models
**Included with FOVP (Flex Oil Vent Pipe) for some models

The Field Direct Vent System (FDVS) is a non-powered positive pressure side wall vent termination system for use only
with specifically listed oil fired appliances. The system provides an outlet for exhaust gases and an intake for combustion
air in a single concentric terminal. The FDVS termination is designed to direct the hot exhaust gases away from the
structure using the static pressure generated by a special oil burner. All of the internal parts in contact with the flue gases
are made from corrosion resistant 316L stainless steel. The FDVS, with its built-in combustion air tee, allows connecting
standard galvanized pipe from the FDVS termination to the air intake of a special oil burner or by use of a Field Controls
Airboot, depending on the model of the oil burner.

THESE INSTRUCTIONS MUST REMAIN WITH EQUIPMENT

Patent

Pending

DO NOT DESTROY

WARNING:

This system MUST be installed by a qualified agency in accordance with the manufacturer’s installation
instructions.

The definition of a qualified agency is: any individual, firm, corporation or company which either in person or through a
representative is engaged in, and is responsible for, the installation and operation of oil appliances, who is experienced in
such work, familiar with all the precautions required, and has complied with all the requirements of the authority having
jurisdiction.

WARNING:

• Read the installation instructions carefully and completely before proceeding with the installation.

• For continued safe operation, the appliance vent system combination is required to be inspected and maintained

annually by a qualified agency. Failure to properly maintain the appliance vent system combination can lead to
Death, Personal Injury and or Property Damage

WARNING:

1. Safety inspection of a venting system should be performed before and after installing a venting system on an existing
or new appliance. Procedures to follow are the latest version of those recommended by the National Fuel Gas Code,
ANSI Z223.1, UL-726, NFPA31, CSA B139, CSA B140.0.03 appliance manufacturer’s recommendations, or refer to
the General Installation Inspection section of this manual.

2. Plan the vent system layout before installation to avoid the possibility of accidental contact with concealed wiring or
plumbing inside walls.

INSTALLATION OF FDVS

DIRECT VENT SYSTEM

INSTALLATION OF THE VENT TERMINATION

(c)

(a)

(b)

(c)

(c)

(g)

(e)

Diagram A

1. Remove vent system components from box and inspect for damage. If the carton
has been crushed or mutilated, check components very carefully for damage. DO
NOT install if any damage is apparent.

2. Remove the combustion air tee assembly from the vent termination. Set the tee
aside for later use.

3. Refer to the appliance manufacturer’s specifications for vent termination location.
The location of the vent termination must be installed with the manufacturer's
recommendations, and/or local codes that are applicable. In the USA according
to the latest version of the National Fire Protection Association NFPA-31,
National Fuel Gas Code ANSI Z223.1. Where requirements for venting standards
differ the most stringent standard shall apply. In Canada according to the latest
version of CSA B140 and the CSA B139 Installation Code. Refer to the following
requirements or See Diagram A for typical locations.

a. The exit termination of mechanical draft systems shall not be less than 7'

above grade when located adjacent to public walkways.

b. A venting system shall terminate at least 3' above any forced air inlet located within

10'.

c. The venting system of other than a direct vent appliance shall terminate at least 4'

below, 4' horizontally from, or 1' above any door, window or gravity air inlet into the
building.

d. The vent termination of a direct vent appliance with an input of 50,000 BTU's per hour

or less, shall be located at least 9" from any opening through which vented gases
could enter the building. With input over 50,000 BTU's per hour, a
12" termination clearance shall be required.

e. The vent termination point shall not be installed closer than 3' from

an inside corner of an L-shaped structure.

f. The vent termination should not be mounted directly above, or

within 3' horizontally from an oil tank vent or gas meter.

g. The bottom of the vent terminal shall be located at least 12" above

finished grade or expected snow line, which ever is greater.

4. After determining the location of the venting system termination (See
Diagram A), cut a hole in the wall sized according to “L” dimension in
Table 1. (See Figure 1)

5. Seal the back side of the base plate around the outer pipe of the vent
termination with a bead of high temperature silicone sealant. (See
Figure 2) Mount the vent termination through the wall, keeping the outer
pipe centered in the hole. (See Figure 1) Fasten the vent termination to the outside wall with appropriate fasteners. Seal the edges
of the vent termination base plate to the wall with a high-temperature silicone sealant.

Figure 1 – End View

Model “L”

FDVS-4 7-1/4”
FDVS-5 8-1/4”
FDVS-6 9-1/4”

Table 1

Figure 2 – Side View

6. Mount the backing plate over the outer pipe. Fasten the backing plate to the inside wall with appropriate fasteners. (See Figure 2)

DO NOT BLOCK the intake or exhaust openings, or the intake access panel on the vent termination body. Wood or vinyl siding should
be cut so that the unit mounts directly on the wallboard to provide a stable support. If the siding is greater than 1/2" thick use a spacer
plate or board behind the vent termination mounting plate. (See Figure 2)

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