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Heater Placement And Clearances; Hanging Appliance On The Wall - Bosch Greentherm T9800 SEC 199 Installation And Operating Instructions Manual

Indoor residential and commercial tankless water heaters
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14 | Installation instructions
▶ Flammable materials, gasoline,
pressurized containers, or any other
items or articles that are potential fire
hazards must NOT be placed on or
adjacent to the heater. The appliance
area must be kept free of all combustible
materials, gasoline and other flammable
vapors and liquids.

Heater placement and clearances

The water heater design is approved for installation on a
combustible wall (see chapter 4.5 Mounting installation)
provided the floor covering below the heater is
For installations in an alcove or closet, maintain the minimum
clearances to combustible and non-combustible materials. See
fig. 6, page 13.

Hanging appliance on the wall

WARNING: Severe personal injury and
property damage!
Before mounting appliance:
▶ Check that there are no loose or
damaged parts inside the appliance.
▶ Set the heater gas type according to the
gas supplied to the unit.
Front cover should be removed (see
instructions on page 10) in order to inspect
components visually.
▶ Do not install this appliance on a
carpeted wall. The heater must be
mounted on a wall using appropriate
anchoring materials.
NOTICE: Risk of appliance freezing!
▶ In areas where outside temperature is
routinely below 32°F (0 °C) and the
heater is to be installed on the inside of
an exterior wall, provide a minimum 2"
air gap or rigid insulation between the
heater back and the wall.
6 720 816 815 (2018/08)
If the wall is sheathed with plaster or drywall, it is
recommended that two support boards, either 1"x 4" or 1/2"
(minimum) plywood first be attached across a pair of studs,
see fig. 7.
▶ Secure the wall mounting bracket provided with the heater
to a wall surface. The heater must be kept level on the wall
surface, see fig. 8, page 15.
▶ Hang the appliance on the bracket, see fig. 9.
Fig. 7
Distance between support boards
[1] Support boards
Vertical studs are typically 16" (406mm) on center.
Greentherm T9800 SE 160/199 | SEC 199

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