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24 | Commissioning
Uni 3000 F6 720 812 900 (2014/10)
5 Commissioning
▶ Complete the commissioning report ( Chapter 5.7, page 26).
5.1 Commissioning
The burner door is lined inside with insulating and refractory concrete.
On account of its manufacturing technique, residual moisture will be
contained in the door lining. This may evaporate during the initial
operation, resulting in droplets forming on the door. Any water vapour
created must be able to dissipate during the overall heat-up time. This
process may take up to one week.
The heat input in the first ten hours run must not exceed 60 %.
This heat-up procedure must be performed.
5.2 Flushing the heating system
Flush the heating system prior to commissioning to prevent
contamination that could block or damage the circulation pump.
▶ Isolate the heating flow and return at the boiler.
▶ Connect the heating flow to a drinking water connection.
▶ Connect a hose to the heating return of the heating system.
▶ Route hose from the heating return to a drain.
▶ Open connected consumers (e.g. radiators).
▶ Flush the heating system with fresh water through the flow until clear
water emerges from the heating return.
▶ Drain the heating system down.
5.3 Filling the heating system
The fill and top-up water quality must comply with the specifications in
the operator's log supplied.
The pH value of the heating water increases after the heating system has
been filled. After 3 – 6 months (initial service) check whether the pH
value of the heating water has settled down.
▶ Adjust the pre-charge pressure of the expansion vessel to the
required pressure (only for sealed unvented systems).
▶ Open the mixing and shut-off valves on the heating water side.
▶ Fill the heating system with the aid of a filling facility and observe the
pressure gauge whilst doing so.
▶ Vent the heating system via the radiator air vent valves.
▶ Top up with water if the water pressure drops as a result of venting
the system.
5.4 Preparing the heating system for operation
Observe the following during commissioning:
▶ Before commissioning, vent the heating system via the ventilation
facilities provided for this purpose.
▶ Ensure that the inspection aperture on the flue gas collector is
closed.
▶ Ensure that the burner door is securely closed.
▶ Ensure that the safety equipment is functioning correctly.
▶ Check that the required operating pressure has been built.
▶ Check the flange connections and other connections for tightness.
5.5 Commissioning the control unit and burner
▶ Use the control unit to commission the boiler.
▶ Set the parameters of the control unit ( Chapter 5.5.1).
▶ Observe the commissioning times ( Chapter 5.1)
The settings made in the control unit will affect the burner as well. The
burner can then be started by the control unit. For further details, see
the technical documents for the particular control unit and/or burner.
▶ Complete the commissioning report in the technical documentation
of the burner.
NOTICE: Risk of boiler damage from contaminated
combustion air.
▶ Never operate the boiler when there is a lot of dust in
the boiler room, e.g. due to building work.
▶ Ensure adequate ventilation.
▶ Never use or store chlorinated cleaning agents or
halogenated hydrocarbons (as contained in spray
cans, solvents or cleaning agents, paints and
adhesives, for example) in the boiler room.
▶ A burner contaminated during building work must be
cleaned before commissioning.
Observe control parameters and specification.
Cracks may occur during heat-up as a result of shrinkage.
Small shrinkage cracks and some flaking are unavoidable
and will not impair the function nor are they considered
damage.
NOTICE: Risk of system damage from water vapour.
If the boiler heats up too rapidly, the water vapour cannot
escape through existing pores in the lining, which may
result in flaking of the door insulation. This may result in a
total destruction of the lining.
▶ To prevent destruction of the lining, it is essential
that the stated heat-up time and maximum heat-up
output be observed.
If the heating system contains several heating circuits,
these must be flushed one after the other.
NOTICE: Risk of system damage from thermal stress.
▶ Only fill the heating system when cold (the flow
temperature must not exceed 40 °C).
▶ Fill the heating system during operation only by a
WRAS approved filling facility in the return of the
pipework for the heating system.
CAUTION: Health risk from contaminated drinking water.
▶ It is essential to observe all country-specific
regulations and standards regarding the prevention
of drinking water contamination. In Europe, observe
standard EN 1717.
Concerning tightness on the flue gas side, a leakage rate
of 2 % of the flue gas flow rate is permissible.
You have the opportunity of raising the flue gas
temperature if the measurements taken for the
commissioning report indicate that the flue gas
temperature is too low (risk of condensate forming) for
the chimney concerned ( Chapter 5.6, page 25).
… 24 …

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Bosch Uni 3000 F Bedienungsanleitung - Englisch - 12 seiten


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