Selecting Heater Location; Mounting Instructions - Bosch 940 ESO Manual

940 eso - natural gas / 940 eso - liquefied petroleum (lp) gas
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14 | Installation using Outdoor Kit (BTOK)
5.3

Selecting heater location

Before proceeding, read the water heater installation manual. If the
information in that manual is not followed exactly, a fire, explosion or
poisoning by carbon monoxide may result causing property damage,
personal injury or death.
▶ Choose an outside wall for the installation. Installation on a wall
protected by an overhang above is recommended.
▶ Size the water and gas connections according to the instructions in
the water heater installation manual. Use unions when connecting
both water lines and gas supply line to the heater.
Minimum clearances
If the appliance is installed under an overhang, there must be a 36"
clearance from the top of the appliance and the mounting area must be
open in front and on the sides of the appliance.
D
E
A
F
Fig. 13
Ref.
Description
A
Directly below or adjacent to an opening;
operable windows, doors and any fresh air
B
openings
C
D
From any adjacent wall
E
Below a gutter, sanitary pipework, eaves or
overhang
F
Above ground
G
From a gas meter or gas regulator
Table 4
Best practice note: The clearances in fig. 13 and table 4
are the minimum allowed by the standard. When
possible consider maximizing the clearances A, B, C, D
and E to allow for the effects of wind and frequently used
door and window openings.
5.4

Mounting instructions

▶ The water heater is approved for installation directly on an outside
wall. Secure the wall mounting bracket provided with the water
heater to a wall surface. See fig. 14.
6 720 644 956 (2016/05)
B
G
C
6720645551-10. 1 V
Min. distances
 1 ft
 1 ft
 3 ft
 1 ft
 3 ft
▶ The installation method of the mounting bracket will depend on the
type of mounting surface. Due to the varieties of building siding or
surfacing, the installer must decide on how best to support and level
the heater on an outside wall. It is recommended that horizontal or
vertical support boards or plywood sheathing (1/2" minimum) first
be attached to the wall surface. The heater must also be kept level on
the wall surface.
Fig. 14 Installation on wood siding
WARNING:
▶ Do not mount heater directly to vinyl siding. With
vinyl siding, a 3½ ' x 4' area of the siding must first be
removed and then replaced with wood or other non-
plastic material. See fig. 15.
Fig. 15 Installation on vinyl
Plywood (½" minimum)
or other solid wood
material(s) to anchor the
wall support bracket and
keep the heater level
against wall surface
Wood
siding
Plywood (½" minimum)
or other solid wood
material(s) to anchor the
wall support bracket and
keep the heater level
against wall surface
Wood
siding
940 ESO

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