District heating systems: Freely programmable mid size application (Excel 50)
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This solution example provides control of
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primary heat exchanger with return water valve and return water temperature limitation |
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primary supply and return water temperature sensors |
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outside air temperature compensated control or room control |
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mixed heating circuit with mixing valve and actuator, pump, pump alarm, supply and return water temperature sensor |
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secondary heat exchanger for domestic hot water, including mixing valve and actuator, pump, supply and return water temperature sensor |
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domestic hot water loading pump control with selectable priority switching and pump alarm |
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two domestic hot water sensors |
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domestic hot water circulation pump control with pump alarm |
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energy management functionalities like Optimum start/stop, maximum load demand management and many others |
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| In addition integration with Honeywell and 3rd party LonWorks(R) systems is possible |
| Excel 50 supports 46 NVs and is LONMARK compliant |
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| Hardware inputs |
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8 universal inputs (NTC20k sensors, 0..10V=, 0..20mA) |
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4 digital inputs for potential free contacts or 24V= |
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| Hardware outputs |
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4 analog outputs 0..10V= |
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6 digital outputs (Triacs) |
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Additional physical outputs can be controlled via LonWorks |
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