Bradford White EF120T Installation & Operation Manual With Troubleshooting Manual page 33

Vertical Installation continued-
2. Determine the best location for the termination kit.
3. Cut the recommended 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 by performing the following:
a. Cement concentric Y fitting to larger diameter pipe (see Figure 21).
b. Cement rain cap to smaller diameter pipe (see Figure 22).
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. Secure assembly to roof structure as shown in Figure 23 using field-supplied metal strapping or equivalent
support material.
Ensure termination height is above the roof surface or anticipated snowfall (see Figure 23).
If assembly is too short to meet height requirements, the two pipes supplied in the kit may be replaced
by using the same diameter pipe. DO NOT extend the overall dimension by more than 60 in (1.52 m).
7. Install rain cap and small diameter pipe assembly in roof
penetration assembly. Ensure small diameter pipe is
cemented and bottomed in concentric Y fitting.
8. Cement heater combustion-air and vent pipes to
concentric Y fitting assembly (Figure 21). See Figure
23 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.
When using the 3 inch concentric vent terminal, the
maximum combined vent length is reduced by 30 ft
(100 ft combined 3 inch venting + 3 inch concentric
terminal). When using the 4 inch concentric vent
terminal, there is no reduction in vent length (200 ft
combined 4 inch venting + 4 inch concentric terminal).
Figure 22 - Rain Cap to Small Vent Pipe Assembly
IMPORTANT
Figure 23 - Concentric
Vent Roof Top Attachment
NOTICE
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