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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.
Horizontal Power Venting — The Tjerlund GPAK-1TN
horizontal kit is certified for use with *RA, *RK 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.
Horizontal Venting Requirements
Furnace
Model Number
Pipe Reducer Maximum Max. Feet
*RA
Size Needed # Elbows Vent Pipe
072C-12
3"
096C-12
3"
096C-16
3"
096C-20
3"
120C-16
3"
120C-20
3"
144C-20
3"
Note: Special 5" to 4" Reducer Kit, p/n 902249 required for model
number *RA144C-20.
Furnace
Model Number Pipe Reducer Maximum Max. Feet
*RK
Size Needed # Elbows Vent Pipe
060C-12
3"
072C-12
3"
072C-16
3"
096C-12
3"
096C-16
3"
120C-20
3"
Table 4. Horizontal Venting Requirements
4" to 3"
4
4" to 3"
4
4" to 3"
4
4" to 3"
4
4" to 3"
4
4" to 3"
4
4" to 3"
3
4" to 3"
4
4" to 3"
4
4" to 3"
4
4" to 3"
4
4" to 3"
4
4" to 3"
4
Installation Instructions are provided with the kit. Installation
must conform to those instructions and applicable
requirements of local codes.
The entire vent system must be sealed with a
high temperature sealant which will withstand
temperatures of 450°F. Recommended sealants:
Dow Corning Sealant 736 RTV; GE 106 RTV;
High Tech Ind., High TEMP RED.
Location of Outdoor Terminations
Horizontal Installation
The vent termination tee must be installed with the following
minimum clearances. (See Figure 19.) Vent Termination
clearances shall be consistant with the National Fuel Gas
Code, ANSI 2223.1/NFPA 54 and/or the CSA B149.1,
Natural Gas and Propane Installation Code.
All minimum clearances specified must be maintained to
protect building material from degradation by flue gases.
1.
The termination tee must be 12 inches above
snow level or grade level which ever is higher. See
Figure 14 for alternate method to achieve 12"
above snow level.
2.
The minimum distance from any door, (openable)
window, or gravity air inlet is 4 ft. below, 4 ft.
horizontally, or 1 ft. above.
3.
The vent termination shall be a minimum of 3 ft. above
any forced air inlet within 10 ft. (See Figure 19.)
4.
Recommended minimum distance from an inside
corner formed by two exterior walls is 6 ft., but is not
required.
35
5.
The minimum distance from gas or electric meter(s)
35
is 4 ft.
35
6.
Avoid areas where condensate drainage may cause
35
problems such as above planters, patios, or adjacent
35
to windows where the steam from the flue gases
35
may cause fogging. Do not terminate above any
30
public walkway.
7.
Select the point of wall penetration where the minimum
1/4 inch per foot of upward slope can be maintained.
8.
When penetrating a noncombustible wall, the hole
through the wall must be large enough to maintain the
pitch, pipe clearance for passage, and provide for
proper sealing. Penetrating a combustible wall
35
requires the use of a wall thimble. (See Figure 20.) A
35
6-1/2 inch square framed opening is required to insert
35
the thimble halves. The thimble is adjustable to
35
varying wall thickness and is held in place by
35
applying sealant to the male sleeve before assembly.
35
Also run a bead of sealant around the outer wall
thimble.
WARNING:
!
17
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