FORSAIRE COUNTERFLOW DIRECT VENT GAS WALL HEATER
13
Vent Installation
WARNING: DANGER OF PROPERY DAMAGE,
BODILY INJURY OR DEATH.
Proper vent installation is critical to the safe operation
of the furnace. Therefore, carefully read and follow all
the instructions given in this section.
The following instructions are for either surface or recess
mounted wall furnace.
USE ONLY THE VENT ASSEMBLY SUPPLIED.
IMPORTANT:
All joints in the inlet and vent tubes and
all gaskets must be tight. Installation in any other
manner voids the C.S.A. design certification and will
affect the warranty.
Refer to
Page 14, Figure 19
for the name and location of
the vent parts.
DETERMINE PROPER LENGTHS
IMPORTANT:
To prevent harmful flue gases from
entering the house, make sure NOT to trim air or vent
tubes shorter than specified below.
Air inlet air tube ‘A’ and vent tube ‘B’ are supplied in
lengths to handle wall thickness up to 8½-inches.
To find the correct vent and air tube length, measure exact
distance ‘X’ between surface on which back of cabinet
will rest (inside of recessed cavity or face of wall when
freestanding and the outside wall surface).
See Page 13,
Figure 18 & Page 15, Figure 19
.
Inlet air tube ‘A’ Add ⅞-inch to dimension ‘X’. Mark on
tube starting from end with collar and holes. Cut off
evenly. File off any burrs resulting.
Vent tube ‘B’ - Add 2⅛-inches to dimension ‘X’. Mark
on tube starting from end with collar and holes. Cut off
evenly. File off any burrs resulting.
CUT ONLY THE PLAIN END (WITHOUT THE FLANGE)
OF THE TUBES. MAKE A SQUARE CUT TO THE EXACT
LENGTH.
HELPFUL CUTTING HINT
To make a straight cut, measure from the end and mark
tube in several places. Align a piece of tape with the marks
and wrap it around the tube. Use the edge of the tape as a
guide to help keep the cut straight.
ATTACHING TUBE TO FURNACE
The smaller diameter vent tube
(Page 14, Figure 19 ”B”)
must be installed first.
The easiest way to install the vent tubes and get the
gaskets positioned properly is to have the furnace lying
front down on a flat surface.
IMPORTANT:
To prevent harmful flue gases from
entering the house, make sure NOT to trim air or vent
tubes shorter than specified below.
1. Attach vent tube
(Page 14, Figure 19 ”B”)
and gasket
to the back of the furnace heat exchanger with
(8) #8 x ⅜-inch sheet metal screws provided.
2. Attach air tube
(Page 14, Figure 19 ”A”)
and gasket to
the back of the furnace casting with (8) #8 x ⅜-inch
sheet metal screws provided.
FIGURE 18 - WALL THICKNESS
SURFACE
MOUNT
RECESSE
MOUNT
WALL WITH
SIDING
BRICK
VENEER
WALL
NOTE:
Each tube must overlap the collars of the vent cap
a minimum of 1¼-inches, which is obtained when tubes
are cut correctly as previously described.
