Hamworthy 563216020, Инструкция по установке, наладке и обслуживанию

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HAMWORTHY HEATING LTD
3
CHESIL-ELECTRONIC 500001181/K
Figure 5- Expansion Vessel Operation
Figure 4 - Typical System Schematic Layout
3.2 Application
The system expansion vessel charge pressure is set 0.1 bar below the cold fill pressure. Before operation of the
boiler, with the system at cold fill pressure the expansion vessel is empty . As the system heats up the expanded
volume is absorbed by the expansion vessel. A small pressure rise occurs which is accommodated by the vessel.
When the system cools the pressure drops. If there has been some fluid loss the pressurisation provides
replacement.
1. Diaphragm position at the cold fill / charge pressure. The vessel is empty of system fluid.
2. Diaphragm position at the hot working pressure. The system volume has expanded due to the temperature
rise. The gas in the vessel is compressed. Acceptance factor = 0.35 maximum (recommended).
3. Diaphragm position at high system pressure. The boiler system is shut down by the system pressure
switch on.
4. Diaphragm at the safety valve lift pressure. Caused by boiler temperature limiter failure for example.
Acceptance factor = 0.5 maximum (recommended).