11
LP-454 REV. 1.6.15
Figure 2 – Minimum Service Clearances
NOTE: If you do not provide the minimum clearances shown in Figure 2, it might not be possible to service the heater without removing
it from the space.
The space must be provided with combustion/ventilation air openings correctly sized for all other water heaters located in the same
space as the heater. The heater cover must be securely fastened to prevent the heater from drawing air from the heater room. This is
particularly important if the heater is in a room with other water heaters. Failure to comply with the above warnings could result in
substantial property damage, severe personal injury, or death.
D. EXHAUST VENT AND INTAKE PIPE
The heater is rated ANSI Z21.10.3 Category IV (pressurized vent, likely to form condensate in the vent) and requires a special vent
system designed for pressurized venting.
NOTE: The venting options described here (and further detailed in the Venting section of this manual) are the lone venting
options approved for this water heater. Failure to vent the water heater in accordance with the provided venting instructions
WILL VOID the warranty.
Failure to vent the water heater properly will result in serious personal injury or death.
Do not attempt to vent this water heater by any means other than those described in this manual. Doing so will void the warranty, and
may result in severe personal injury or death.
Failure to provide an adequate supply of fresh combustion air can cause poisonous flue gases to enter living space, resulting in severe
personal injury or death. To prevent combustion air contamination, see Table 1.
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