59SC2E: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
46
2-Pipe and 1-Pipe Vent Termination
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 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 Fig. 40 and Fig. 48.
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 Fig. 40, but next vent
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 Fig. 40 to avoid recirculation of vent
gases.
Inducer Outlet Restrictor
To improve efficiency and operation of 40K, 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. The outlet restrictor for 40K models is shipped in the loose
parts bag. 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. Failure to
use an outlet restrictor on the 40K input 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.
NOTICE
!
RECOMMENDED SUPPORT FOR VENT
TERMINATIONS
It is recommended that sidewall vent terminations in excess of 24
inches (0.6 M) in vertical length be supported by EITHER the Direct
Vent Termination Kit shown in Table 12 or by field-supplied brackets
or supports fastened to the structure.
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