Bradford White eF Series Installation & Operation Manual With Troubleshooting Manual page 32

Venting continued-
3. Cut the recommended 3 ½ in (8.9 cm) diameter hole for 2 in (5.1 cm) vent terminations, 6 5/8 in (16.9 cm) diameter
hole for 4 in (10.2 cm) vent termination, or 4 ½ in (11.5 cm) for 3 in (7.6 cm) vent termination.
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 23. Ensure clearances as shown in Figure 24.
8. Cement heater combustion-air and vent pipes to concentric Y fitting termination assembly. See Figure 24 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.
WARNING!
DO NOT USE 2" VENT
WITH 100T250/300 MODELS.
(A) VENT (B) DIMENSION
DIAMETER
MIN
2 in (5.1 cm) 12 in
(30.5 cm)
3 in (7.6 cm) 12 in
(30.5 cm)
4 in (10.2 cm) 12 in
(30.5 cm)
Figure 23A - Concentric Vent Side Wall Attachment
MAX
40 in
(101.6 cm)
44 in
(111.8 cm)
37 in
(94 cm)
Figure 23B – Concentric Vent Acceptable Dimensions
32