LP-454 Rev. 004 Rel. 002 Date 12.1.17
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4. Outdoor Installation
When drawing combustion air from the outdoors, care must be
taken to provide adequate freeze protection. Failure to do so could
result in property damage and premature product failure. Such
damages and failures ARE NOT covered by product warranty.
This water heater is designed to draw combustion air through the
louver system in the front of the heater cabinet. Before starting a
heater installed outdoors, the end cap must be removed so that the
heater draws combustion air through the louvers. This combustion air
also serves to cool the internal electronics when the heater is installed
in very warm climates.
To prevent combustion air contamination or exhaust recirculation:
• Ensure the heater is located away from the building. Flue gas
can cause damage to exterior walls and other devices.
• Locate the heater at least 48” below or horizontally from any
window, door, walkway, or gravity air intake.
• Locate the heater 10’ away from any public area, outdoor
sitting area, or forced air inlet.
• Locate the heater away from areas that may change over time.
Do not allow the growth of trees, shrubs, or plants to obstruct
proper operation of the exhaust vent system.
• If the heater is located in a fenced area, ensure the unit exhaust
extends level with or above the top of the fence to ensure ue
gas does not get trapped and possibly recirculated into the
louver system, which could contaminate the combustion air.
Figure 16 - Recommended Outdoor Installation Clearances
Figure 17 - Recommended Outdoor Enclosure
Figure 18 - Outdoor Enclosure with Overhang
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