Bryant 926TC Installation, Start-Up, Operating And Service And Maintenance Instructions page 47

926TC: Installation, Start-up, Operating and Service and Maintenance Instructions
Cut the required number of holes in the roof or sidewall for vent and
(when used) combustion air pipes. Sidewall holes for two-pipe vent
terminations should be side-by-side, allowing space between the pipes
for the elbows to fit on the pipes.
Holes in the roof for direct-vent two-pipe terminations should be spaced
no more than 18 in. (457 mm) apart to help avoid vent gas recirculation
into combustion air intake.
Termination elbows will be installed after the vent and (if used)
combustion air pipe is installed.
Sidewall Terminations
Concentric Vent
NOTE: Follow the instructions of the vent terminal manufacturer.
These instructions are provided as a reference only.
Determine an appropriate location for termination kit using the
guidelines provided in section "Locating The Vent Termination" in
this instruction.
1. Cut one 4-in. diameter hole for 2-in. kit, or one 5-in. diameter hole
for 3-in. kit.
2. Loosely assemble concentric vent/combustion air termination
components together using instructions in kit.
3. Slide assembled kit with rain shield REMOVED through hole.
NOTE: Do not allow insulation or other materials to accumulate inside
of pipe assembly when installing it through hole.
4. Locate assembly through sidewall with rain shield positioned no
more than 1-in. (25 mm) from wall as shown in
5. Disassemble loose pipe fittings. Clean and cement using same
procedures as used for system piping. DO NOT CEMENT
POLYPROPYLENE FITTINGS.
2-Pipe and 1-Pipe Vent Termination
NOTE: Follow the instructions of the vent terminal manufacturer.
These instructions are provided as a reference, only.
!
RECOMMENDED SUPPORT FOR VENT TERMINATIONS
It is recommended that sidewall vent terminations in excess of 24
inches (.6 M) in vertical length be supported by EITHER the Direct
Vent Termination Kit shown in
or supports fastened to the structure.
Determine an appropriate location for termination kit using the
guidelines provided in section "Locating The Vent Termination" in this
instruction.
1. Cut two holes, one for each pipe, of appropriate size for pipe size
being used.
2. Loosely install elbow in bracket (if used) and place assembly on
combustion-air pipe.
3. Install bracket as shown in
NOTE: For applications using vent pipe option indicated by dashed
lines in Fig. 40 and Fig. 41, rotate vent elbow 90_ from position.
4. Disassemble loose pipe fittings. Clean and cement using same
procedures as used for system piping. DO NOT CEMENT
POLYPROPYLENE FITTINGS.
(Direct Vent / 2-Pipe System ONLY)
When two or more furnaces are vented near each other, two vent
terminations may be installed as shown in
termination, or pair of vent terminations, must be at least 36 in. (914
mm) away from the first two terminations. It is important that vent
terminations be made as shown in
gases.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 40.
NOTICE
Table 13 or by field-supplied brackets
Fig. 40 and Fig. 49.
Fig. 40, but next vent
Fig. 40 to avoid recirculation of vent
Inducer Outlet Restrictor
To improve efficiency and operation of 40K, 60K or 100K BTUh input
models on very short vent systems, an inducer outlet restrictor is
required to be installed on the outlet of the inducer assembly. The outlet
restrictor is shown in the footnote of
Vent Length. The outlet restrictor for 40K models is shipped in the loose
parts bag. See Table 15 for usage, part numbers and sourcing of 60K and
100K inducer outlet restrictors.
To determine if the outlet restrictor is required, see
use an outlet restrictor on the 40K model when required may result
in flame disturbance or flame sense lockout.
To install the outlet restrictor:
1. Remove the vent elbow from the inducer outlet.
2. Align the lock tabs on the outlet restrictor with the slots on inside
outlet of the inducer assembly.
3. Snap the outlet restrictor in place.
4. Re-install the vent elbow.
5. Torque vent elbow clamp 15-lb-in.
47
Table 15 -Maximum Equivalent
15. Failure to
Table