Selecting The Installation Location; Regulations For The Installation Location; Total Length Of The Flue System (Type C Devices); Minimum Clearances - Bosch Therm 4000 S Installation And Operating Instructions Manual

TDS (Total dissolved solids) (mg/l) Hardness
0 - 600
Table 12
NOTICE: Damage to the device!
If these values are not observed, it can result in
partial blockage and faster ageing of the
internal body of the device.
5.2

Selecting the installation location

5.2.1 Regulations for the installation location

General notes
▶ Observe country-specific requirements.
▶ Never install the instantaneous water heater above a heat
source.
▶ Maintain the minimum clearances specified in Fig. 12.
▶ Never install the device in rooms, where the temperature
can fall below freezing point (0 °C). When there is a danger
of frost, switch the device OFF and drain it ( Fig. 10).
-or-
▶ Installing frost protection accessories.
▶ It must be ensured that at the installation location there is a
socket available, which is easily accessible after the
instantaneous water heater has been installed.
Type B devices
▶ Only install the device in rooms with a minimum size of
3
8 m . The furniture should not comprise more than 2 m
Air supply (Type B devices)
Depending on the type of device, the location intended for the
installation of the device must have the area for air supply that
is listed in the table.
Device
GWH12...
Table 13 Effective area for the air supply
In addition to the above minimum requirements, country-
specific requirements must also be observed.
Combustion air
The air grille for the air suction must be located in a well
ventilated room.
Keep the supply of combustion air free of corrosive substances
to prevent corrosion.
Corrosive substances include halogenated hydrocarbons
which contain chlorine and fluoride compounds. These could
Therm 4000 S – 6 720 815 298 (2017/05)
PH
(mg/l)
0 - 180 6.5 - 9.0
Minimum effective area
 60 cm 2
be contained in, for example, solvents, paints, adhesives,
propellants and domestic cleaning agents.
If these conditions cannot be met, another location must be
selected for the air supply.

5.2.2 Total length of the flue system (Type C devices)

The total length of the flue system must not exceed the values
given in Tabs. 10 and 11, and it must not be smaller than the
values (Lmin) given in Tab. 14.
The equivalent length (Leq) must be taken into account for
each accessory used, when determining the overall length of
the system.
If the flue gas routing is horizontal, the first
bend after the outlet from the device must
not be taken into account for the calculation.
Ø
Ø 80
Ø 60/100
Table 14 Equivalent lengths
Surface temperature
The maximum surface temperature of the device is less than
85 °C. In accordance with TRGI or TRF, it is not therefore
necessary to observe safety clearances for combustible
construction materials and installed furniture. Country-specific
guidelines must be observed.
3
.
5.3

Minimum clearances

When selecting the installation location for the device, the
following restrictions must be observed:
▶ Maximum clearance for all protruding parts, such as hoses,
pipes etc.
▶ Ensure easy accessibility for maintenance and observe the
minimum clearances shown in Fig. 12.
Installation (only for approved contractors)
Accessory Leq
part
90 ° bend 1.5 m
90 ° bend 2 m
Lmin
0.5 m
0.375 m
17