Commissioning; Adjustments (Must Be Carried Out Only By Qualified Technicians); Factory Regulations - Bosch Therm 4300 Series Installation And User Instructions Manual

Adjustments (must be carried out only by qualified technicians)

The gas connection to the water heater must absolutely comply
with the National Standards.
▶ First ensure that the water heater to be installed
corresponds to the type of gas supplied.
▶ Fit a gas shut-off valve at the entrance as close as possible
to the appliance.
▶ After completion of the gas network. thorough cleaning
must be done and a tightness test carried out to avoid
damage due to excess pressure in the gas system, this has
to be carried out with the gas valve of the appliance closed.
▶ Check that the flow and the pressure supplied for the
reducer installed are those indicated for the consumption
of the appliance (see technical data in tab. 4).
Installation with flexible tube (G.P.L.)
DANGER: Danger to life caused by gas leak!
▶ Proceed to replace the tube if you find
that it is dry and fragile.
▶ Replace the tube at least every four
years.
The installation, if done with flexible tube (not metal), only for
appliances designed to be connected to a bottle of Butane,
must comply with the following:
• must have a possible minimum length of at most 1.5 m;
• the tube must comply with ET IPQ 107-1 and applicable
standards;
• must be controllable all the way through;
• must not come near areas where heat is released;
• avoid folds or other bottlenecks;
• the connection at the ends must be made with proper
accessories and tabs without grooves
▶ Check that the supply tube is clean.
▶ Use the accessory door rubbers (supplied) and a tab to
make the connection to the incoming gas of the appliance.
Installation with connection to a gas supply network
▶ In the case of an installation with connection to a gas supply
network, you must use metal tubes in accordance with the
applicable standards.
To make the connection between the gas supply network and
the water heater, you must use the accessory supplied.:
▶ Tighten the coil in the incoming gas tube.
▶ Use the end in copper to do the welding to the tube from the
supply network
Gas pressure regulator
This appliance requires an operating pressure of 2,8 kPa at the
appliance. A suitable LPG regulator that complies with the
requirements of SANS 1237 must be installed.
14
Any local by-laws and regulations pertaining to installation and
use of gas-heated appliances must be observed.
Please refer to the laws that should be attended in your
country.
5.7

Commissioning

▶ Turn on the gas and water cocks and check all connections
for leaks.
▶ Check flue gas safety device is functioning correctly,
proceed as explained in section 7.4.
6 Adjustments (must be carried out only by
qualified technicians)
6.1

Factory regulations

Sealed parts must not be interfered with.
Natural gas
Heaters must not be turned on if the
connection pressure is lower than 1,5 kPa or
higher than 2,5 kPa.
Heaters for natural gas (G 20) are supplied sealed from the
factory after being adjusted to the values indicated on the type
plate.
Liquefied gas
The appliances must not be operated if the
dynamic connection pressure is:
- Propane: less than 2,5 kPa or greater than
4,5 kPa
-Butane: less than 2,0 kPa or greater than
3,5 kPa.
Heaters for propane/butane (G31/G30) are supplied sealed
from the factory after being adjusted to the values indicated on
the type plate.
DANGER: The following procedures must
only be performed by a qualified technician.
Power may be tuned according to the burner pressure process,
for which a manometer is required.
Therm 4300 – 6 720 821 607 (2018/01)