Preconditions For Installation; General Notes; Installation Location Requirements; Water System And Pipe Work - Bosch Condens 8300i W Installation And Maintenance Instructions Manual

Preconditions for installation

Allowed maximum length
GC8300iW 35 P
Accessory Ø
[mm]
Ø 60/100
Ø 80/125
Table 9 Flue routing
5 Preconditions for installation
5.1

General notes

▶ Observe all the current applicable national and regional regulations
as well as all technical rules and guidelines.
▶ Obtain all necessary approvals (gas supplier, etc.).
▶ Consider the requirements of the building authorities, e.g. when
using a condensate neutraliser (accessory).
▶ Convert open heating systems into closed systems.
▶ Do not use galvanized radiators or pipework.
5.2

Installation location requirements

DANGER
Danger to life from explosion!
An increased and permanent ammonia concentration may lead to stress
corrosion cracking on brass (e.g.gas valves, union nuts). As a result,
there is a risk of explosion from gas escaping.
▶ Do not use wall mounted gas boilers in rooms where there is an
increased or permanent ammoniac concentration (e.g. livestock
stables or storage room for fertilisers).
▶ If contact with ammonia is unavoidable, make sure that there are no
brass parts installed in the system.
Surface temperature
The maximum surface temperature of the appliance is below 85 °C.
Therefore no special safety measures are required to protect flammable
materials and fitted furniture. Country-specific regulations must be
observed.
Wall structure
The wall used for installation of the appliance must be load-bearing and
the appliance must be able to rest on it over the entire surface.
Protection zones in damp areas
Observe all the current applicable national and regional regulations as
well as all technical rules and guidelines. These may contain additional or
deviating requirements for installations in damp areas.
▶ Do not install any switches, sockets or devices with mains power
supply in the protection zones.
▶ Connect device to a residual current circuit breaker.
▶ Use only control units with suitable IP rating.
12
Maximum pipe length L
[m]
14
29
m
6 0 0 m
A
Fig. 9 Protection zones (example)
[0] Protection zone 0
[1] Protection zone 1
[2] Protection zone 2
[2*] Without bulkhead, protection zone 2 with a width of 600 mm
applies.
[A] Within a radius of 600 mm from the bath or shower
5.3

Water system and pipe work

Plastic pipe work
• Any plastic pipe work must have a polymeric barrier with 600 mm
(minimum) length of copper pipe connected to the boiler.
• Plastic pipe work used for underfloor heating must be correctly
controlled with a thermostatic blending valve limiting the
temperature of the circuits to approximately 50 °C.
Primary system connections/valves
• All system connections, taps and mixing valves must be capable of
sustaining a pressure up to 3 bar (300 kPa).
• Bosch recommends that thermostatic radiator valves (TRVs) be used
on all radiators within the sleeping accommodation but not the
radiator where the room thermostat is sited. This must be fitted with
lock-shield valves and left open.
• A drain point is required at the lowest part of the system.
• An air vent is required at all the high points in the system.
The boiler is equipped with an automatic internal by-pass.
Sealed primary system
Do not use artificially softened water to fill the CH system.
Do not use galvanised pipes or radiators.
• The CH sealed system must be filled using an approved filling loop or
comply with figure 10, p. 13 for system fill.
Condens 8300i W – 6721841533 (2022/12)
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0010017086-002