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9. Operate heater through one cycle to ensure combustion-air and vent pipes are properly connected and sealed to concentric vent
termination connections.
Horizontal Installation:
1. Become familiar with coaxial vent kit part no. 239-44069-01, as shown in Figures 19 through 21. For venting 4 inch (10.2 cm) or 2 inch (5.1
cm) diameter pipe, use the appropriate bell reducer to reduce to the 3 inch (7.6 cm) diameter vent size to connect to the 3 inch (7.6 cm)
vent terminal connections. If the 2 inch diameter concentric vent kit is preferred with 2 inch diameter pipe, then order concentric vent kit
part no. 239-44069-02 from your supplier.
WARNING
The EF100T250 and EF100T300 models are not approved for 2 inch diameter vent pipe. Venting with 2 inch pipe on
these models may result in damage to the water heater or cause an unsafe condition. DO NOT use 2 inch Vent or
Air Intake Pipe on EF100T250/300 models.
2. Determine the best location for the termination kit.
NOTICE
Position termination where vent vapors will not damage plants/shrubs or air conditioning equipment.
Position termination where vent vapors will not be adversely affected by wind condition.
Position termination where it will not be damaged or be subjected to foreign objects.
Position termination where vapors will not be objectionable.
3. Cut the recommended 5” (12.7 cm) diameter hole (for 3” vent termination) or 4 inch (10.2 cm) for 2” vent termination kit.
4. Partially assemble vent kit.
a. Cement Y concentric fitting to larger diameter kit pipe. (See Figure 20).
b. Cement rain cap to smaller diameter kit pipe. (See Figure 21).
5. Install concentric Y fitting and pipe assembly through the structure’s hole and field-supplied roof boot/flashing. Do not allow insulation or
other materials to accumulate inside pipe assembly when installing through the hole.
6. Install rain cap and small diameter pipe assembly in concentric Y fitting and large pipe assembly. Ensure small diameter pipe is cemented
and bottomed in concentric Y fitting.
7. Secure assembly to structure as shown in Figure 23A. Ensure clearances as shown in Figure 23A.
Figure 23A. Concentric Vent Side Wall Attachment
8. Cement heater combustion-air and vent pipes to concentric Y fitting termination assembly. See Figure 23A & 23B for proper pipe
attachment.
9. Operate heater through one cycle to ensure combustion-air and vent pipes are properly connected and sealed to concentric vent
termination connections.