Installation Of Duct - Field Controls CAS-4JR Manual

INSTALLATION
PLACEMENT OF THE CAS UNIT
The motorized CAS unit should be located on a
fl at horizontal surface within the same space as
the appliance and within 3' of the combustion air
intake. Two mounting brackets are provided for
securing the unit against a solid structure, such as
a wall, column, or the side of the appliance itself.
Use the included screws to attach the brackets to
the CAS housing as shown in Figure 1. Secure
the brackets to a solid structure with appropriate
fasteners. It is not required to use the brackets as
long as the unit is located so that it may not be
bumped, moved, or tipped over.
INTAKE AIR HOOD LOCATION
The 4" galvanized vent hood should be located on
an outside wall maintaining minimum clearances
to other intake and exhaust vents in accordance
with the National Fuel Gas Code, ANSI Z223.1,
manufacturer's recommendations and/or local
codes which are applicable. The hood should be
located at least 10' from a power vented exhaust
outlet and should be on the same wall. The intake
air hood should be a minimum of 1' above grade
or snow lines where applicable.
INSTALLATION OF INTAKE AIR HOOD
After determining the location of the vent hood, cut
a 4 ⁄ " round or square hole in the wall. Insert the
1
2
vent hood and secure with appropriate fasteners.
Take precautions to avoid interference with wiring
or other plumbing in the wall to be cut.

INSTALLATION OF DUCT

Refer to Diagram A to determine what pipe is
needed. Connect the duct pipe from the top of the
CAS unit to the Vent Hood in the wall. The duct
should be supported with appropriate mounting
straps from fl oor joists, walls, or other solid
structures. The straps should be placed so
as to keep the duct work out of passageways.
(See Figure 2)
P/N 46527900 Rev C 03/17 page 4 of 8
Figure 1
Figure 2