HDG M299, Руководство по эксплуатации

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4 Planning and installation – Vacuum pressure control
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4.6 Vacuum pressure control
Optionally available is an HDG vacuum pressure control with
frequency converter and differential pressure transmitter for
adapting to changing chimney conditions. It creates an automatic
adjustment to the underpressure required for output and
combustion control and thereby improves the partial load capacity
of the system.
4.7 Electrical system
The electrical connections must be made in accordance with DIN IEC
60364 “Setting up low-voltage electrical installations”.
✎
The technical details are described in the chapter “3 Mode of
operation”, section “3.3 Technical data”.
1. Install the electrical connections in accordance with the provided
wiring diagrams.
✎
The wiring diagrams can be found in the supplied documentation.
4.8 Water
The diaphragm expansion vessel must be constructed in accordance
with DIN EN 13831 “Closed expansion vessels with built-in
diaphragm for integration in water installations”.
Before putting the system into operation, the pressure of the
diaphragm expansion vessel must be adjusted for the conditions in
the heating system and in the building.
After putting the system into operation, heat up the system to the
maximum boiler temperature and bleed air from the system again to
make sure that there are no air pockets.
In Germany, the requirements of the German energy conservation
ordinance (EnEV) must be met.
Important!
The heating system must be filled with water in accordance with
VDI guideline 2035, “Avoiding damage in hot water heating
systems”.
Once the combustion unit and the heat exchanger have been
assembled, the HDG M299/300/350/400 boiler must be submitted
to a water pressure test, at a testing pressure of 4 bar.