Bock Water heaters OT300-A Installation And Operation Instruction Manual page 8

SECTION III: PRE-INSTALLATION (cont.)
LOCATION (cont.)
Do not drop water heater or lay heater down on its side. Move the water heater into
position by sliding or using an appropriately sized hand truck.
If the water heater is installed directly on carpeting, the water heater shall be installed
on a metal or wood panel extending beyond the full width and depth of the water
heater by at least 3 inches (76.2 mm) in any direction or, if the water heater is installed
in an alcove, the entire floor shall be covered by the panel. The panel must be strong
enough to carry the weight of the heater when full of water.
NOTE: Locate the heater so it is not subject to physical damage from moving vehicles or
flooding. Do not locate the water heater in a room where swimming pool chemicals or large
quantities of water softener salt are kept. Installing a water heater in this environment will
result in premature failure of tank and burner components due to corrosion caused by these
elements diffusing into the air.
The water heater can be installed on combustible or non-combustible flooring. Maintain
clearances specified in this manual and in accordance with the National Fuel Gas Code (NFPA
54, ANSI Z223.1) unless otherwise directed by state and local code requirements. Locate the
water heater such that plastic vent pipe lengths and the number of connection fittings are
minimized. Adequate downward pitch is required on the condensate line for proper drainage.
See Section IV: Installation / Vent & Combustion Air Intake / Condensate Elbow Assembly for
details. If pitch is insufficient and the use of a low profile condensate pump is not feasible, the
heater needs to be placed on a concrete slab to increase the distance between the condensate
line connection and the floor.
Minimum clearance from combustible material is 0" for the sides, top, and back of this water
heater, as shown in Figure 2. This water heater is approved for installation in an alcove with
the clearances shown in Figure 2.
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Figure 2: Minimum Clearance From Combustible Material
CAUTION
CAUTION