International comfort products R9MSB0801716 Installation Instructions Manual page 48

INSTALLATION INSTRUCTIONS
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 Figure 54.
5. Disassemble loose pipe fittings. Clean and cement using
same procedures as used for system piping. DO NOT
CEMENT POLYPROPYLENE FITTINGS.
Two-Pipe and Single-Pipe Vent Termination
NOTE: Follow the instructions of the vent terminal
manufacturer. These instructions are provided as a reference,
only.
NOTICE
RECOMMENDED SUPPORT
TERMINATIONS
It is recommended that side−wall vent terminations in
excess of 24 inches (0.6 M) in vertical length be sup-
ported by EITHER the Direct Vent Termination Kit in
Table 12 or by field-supplied brackets 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 2 holes, 1 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 Figure 54 and Figure 56.
NOTE: For applications using vent pipe option indicated by
dashed lines in Figure 54 and Figure 55, 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.
48
(Direct Vent / Two-Pipe System ONLY)
When two or more furnaces are vented near each other, two
vent terminations may be installed as shown in Figure 54, but
next vent termination, or pair of vent terminations, must be at
least 36−in. (914 mm) away from first two terminations. It is
important that vent terminations be made as shown in
Figure 54 to avoid recirculation of gases.
Inducer Outlet Restrictor
To improve efficiency and operation of 60K, 100K, or 120K
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 Table 14 − Maximum Equivalent Vent Length. See Table 14
for usage, part numbers and sourcing of 60K, 100K, and 120K
inducer outlet restrictors.
To determine if the outlet restrictor is required, see Table 14.
To install the outlet restrictor:
FOR VENT
1. Remove the vent elbow from the inducer outlet.
2. Align the lock tabs on the outlet restrictor with the slots
3. Snap the outlet restrictor in place.
4. Re-install the vent elbow.
5. Torque vent elbow clamp 15-lb. in.
Specifications subject to change without notice.
on inside outlet of the inducer assembly.
Gas Furnace: R9MSB
440 01 6001 05