Gas Piping & Connections - Bosch 520PN Applications Manual

24 | Installation instructions
Front cover should be removed (see instructions on page
8) in order to inspect components visually.
WARNING:
▶ Do not install this appliance on a carpeted wall. The
heater must be mounted on a wall using appropriate
anchoring materials.
WARNING:
▶ In areas where outside temperature is routinely below
32°F and the heater is to be installed on the inside of
an exterior wall, a minimum 2" air gap or rigid
insulation between the heater back and the wall is
recommended.
If 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. 26, page 24.
▶ 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. 27,
page 24.
▶ Hang the appliance on the bracket, see fig. 28, page 25.
Fig. 26 Distance between support boards
[1] Studs 16" (406mm) on center
6 720 644 887 (2013/02)
Fig. 27 Leveling wall mounting bracket
Fig. 28 Mounting the heater
WARNING:
▶ Appliance must be installed vertically.
4.8 Gas piping & connections
Before connecting the gas supply, check the rating plate on the right side
of the heater to be sure that the heater is rated for the same gas to which
it will be connected.
In the United States: The installation must conform with local codes or,
in the absence of local codes, the National Fuel Gas Code ANSI Z223.1/
NFPA 54.
6720608158-64.1AL
6720608158-05. 1 AL 6720608158-05. 1 AL
C 1210 ES/ESC