G6RA, G6RK Service Manual 15
CAUTION:
Do not drill holes through the vent pipe or
fittings on a horizontally vented furnace. Do not
use sheet metal screws, or rivets. Drilling,
screws, or rivets will cause leaks.
Figure 14. Typical Horizontal Vent Installation
Furnace Pipe Reducer Maximum Max. Feet
Model Number Size Needed # Elbows Vent Pipe
G6RA045C-08 3" None 4 35
G6RA060C-12 3" 4" to 3" 4 35
G6RA072C-12 3" 4" to 3" 4 35
G6RA096C-16 3" 4" to 3" 4 35
G6RA096C-20 3" 4" to 3" 4 35
G6RA120C-16 3" 4" to 3" 4 35
G6RA120C-20 3" 4" to 3" 4 35
G6RA144C-20 3" *4" to 3" 3 30
G6RK060C-12 3" 4" to 3" 4 35
G6RK072C-12 3" 4" to 3" 4 35
G6RK072C-16 3" 4" to 3" 4 35
G6RK096C-12 3" 4" to 3" 4 35
G6RK096C-16 3" 4" to 3" 4 35
G6RK120C-20 3" 4" to 3" 4 35
Note: Special 5" to 4" Reducer Kit, p/n 902249 required for model
number G6RA144C-20.
Table 4. Horizontal Venting Requirements
Horizontal Venting (Thru-the-Wall)
Venting Requirements
!
bands are installed. If the lengths of pipe must be cut, the
joint must still be sealed with silicone and the locking band
used. When installing the condensate tube be sure to form
a trap by means of a 3" loop filled with water. (See Figure 14.)
Keep the number of pipe fittings to a minimum. Maintain a
minimum of 6 inches of air space between the vent and
combustibles at all times, this includes inside and outside the
building.
NOTE: The direction of the male-female joints from the drain
tee to the termination tee is opposite to standard gas
appliance venting. The male end of the pipes point towards
the furnace.
1. Apply an adhesive bead around the outside of the pipe
approximately 1/4" from the end of the pipe. This
includes the first fitting or pipe attached to the furnace.
2. Push the pipe and fitting together while twisting the
pipe or fitting. Twisting the pipe or fitting spreads the
adhesive completely within the fitting socket.
3. When the pipe is at the socket bottom, inspect the
joint. Look for a complete, uninterrupted ring of adhesive
material around the pipe at the fitting socket. Additional
adhesive or rotation of the pipe or fitting may be
required for a complete seal. The complete adhesive
material ring provides the seal required for the positive
pressure vent.
4. All vent systems must include a tee and drain plug for
collection and disposal of condensate. The drain tee
must be installed within the first 5 feet of vent run to
protect the furnace.
5. All horizontal sections must have a slope toward the
drain tee of not less than 1/4" per foot to prevent the
collection of condensate at any location other than at
the tee.
6. Horizontal runs must be supported with 3/4" pipe strap
at a maximum of 5 foot intervals and at each point
where an elbow is used.
7. Maintain a 6 inch minimum air space to combustibles
from all sections of the stainless steel vent system,
except when a wall thimble is used.
Through-The-Wall Power Venting
— The Tjerlund GPAK-
1TN through-wall kit is certified for use with G(-) Series
furnaces. The kit includes a power venter, a side-wall vent
hood and a barometric draft control. It has an electrical
interlock to assure that the furnace will not operate when the
power venter is off.
The kit is for use only when exhaust is through an exterior
wall, normally with horizontal vent piping. The power venter
establishes negative pressure in the vent piping and the
furnace operates as if connected to Category I vertical
venting.
Installation Instructions are provided with the kit. Installation
must conform to those instructions and applicable
requirements of local codes.
90
˚
Elbow
3" Dia. Loop
Outside
Wall
Wall Thimble
(For combustible
wall material)
Termination
Tee
Support
Tee
0-6'
Drain
Plug
1
/
4
" Per
Foot Rise
Locking Band
Locking
Band
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