Bryant 987MA Installation, Start-Up, Operating And Service And Maintenance Instructions page 42

two-pipe or single pipe vent systems, a flashing for each pipe of the
required diameter will be necessary.
It is recommended that the flashing be installed by a roofer or
competent professional prior to installing the concentric vent. The
terminations can be installed on a flat or pitched roof.
Concentric Vent
Single or multiple concentric vent must be installed as shown in
Fig. 46. Maintain the required separation distance between vents
or pairs of vents as shown in Fig. 46 and all clearance shown in
Fig. 44.
Cut one 4- -in. (102 mm) diameter hole for 2- -in. (51 mm) kit, or
one 5- -in. (127 mm) diameter hole for 3- -in. (76 mm) kit in the
desired location.
Loosely assemble concentric vent/combustion air termination
components together using instructions in kit.
Slide assembled kit with rain shield REMOVED through hole in
wall or roof flashing.
NOTE: Do not allow insulation or other materials to accumulate
inside of pipe assembly when installing it through hole.
Disassemble loose pipe fittings. Clean and cement using same
procedures as used for system piping.
Two- -Pipe and Single- -Pipe Terminations
Single and two pipe vent must be installed as shown in Fig. 46 and
47. Maintain the required separation distance between vents or
pairs of vents as shown in Fig. 46 and 47. and all clearance shown
in Fig. 44 and 45.
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 two pipe terminations should be spaced no
more than 18 in. (457 mm) apart.
Termination elbows will be installed after the vent and (if used)
combustion air pipe is installed.
Sidewall Terminations
Concentric Vent Termination
Determine an appropriate location for termination kit using the
guidelines provided in section "Locating The Vent Termination" in
this instruction.
Table 11 – Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials (U.S.A. Installations)
ASTM SPECIFICATION
(MARKED ON MATERIAL)
D1527
D1785
D2235
D2241
D2466
D2468
D2564
D2661
D2665
F438
F441
F442
F493
F628
F656
F891
MATERIAL PIPE FITTINGS
ABS Pipe —
PVC Pipe —
For ABS — —
PVC Pipe —
PVC — Fittings
ABS — Fittings
For PVC — —
ABS Pipe Fittings
PVC Pipe Fittings
CPVC — Fittings
CPVC Pipe —
CPVC Pipe —
For CPVC — —
ABS Pipe —
For PVC — —
PVC Pipe —
1. Cut one 4- -in. diameter hole for 2- -in. kit, or one 5- -in. dia-
meter hole for 3- -in. kit.
2. Loosely assemble concentric vent/combustion air termina-
tion 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 posi-
tioned no more than 1- -in. (25 mm) from wall as shown in
Fig. 46.
5. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping.
Direct Vent (2- - pipe) Termination
Determine an appropriate location for termination kit using the
guidelines provided in section "Locating The Vent Termination" in
this instruction.
1. Cut 2 holes, 1 for each pipe, of appropriate size for pipe size
being used.
2. Loosely install elbow in bracket and place assembly on
combustion- -air pipe.
3. Install bracket as shown in Fig. 46 and 48.
NOTE: For applications using vent pipe option indicated by
dashed lines in Fig. 46 and 47, rotate vent elbow 90_ from
position.
4. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping.
For ventilated Combustion Air Terminations, terminate as
shown in Fig. 47.
(Direct Vent / 2-Pipe System ONLY)
When 2 or more furnaces are vented near each other, 2 vent
terminations may be installed as shown in Fig. 46, but next vent
termination must be at least 36 in. (914 mm) away from first 2
terminations. It is important that vent terminations be made as
shown in Fig. 46 to avoid recirculation of flue gases.
Inducer Outlet Restrictor
The loose parts bag may contain an inducer outlet restrictor. The
outlet restrictor is NOT used on these furnaces. Discard restrictor.
SOLVENT CEMENT
AND PRIMERS
—
—
Solvent Cement
—
—
—
Solvent Cement
—
—
—
—
—
Solvent Cement
Cellular Core DWV at Schedule--- 40
—
Primer
— Cellular Core Schedule--- 40 & DWV
42
DESCRIPTION
Schedule--- 40
Schedule--- 40
For ABS
SDR--- 21 & SDR--- 26
Schedule--- 40
Schedule--- 40
For PVC
DWV at Schedule--- 40 IPS sizes
DWV
Schedule--- 40
Schedule--- 40
SDR
For CPVC
IPS sizes
For PVC