District heating systems: Freely programmable IP networked, large size application (Excel Web)
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This example 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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safety thermostat for secondary loop |
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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 and safety thermostat |
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secondary heat exchanger for domestic hot water, including mixing valve and actuator, pump, pump alarm, supply and return water temperature sensor |
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solar energy domestic hot water control with loading pump and 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 |
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energy management functionalities like Optimum start/stop, maximum load demand management and many others |
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In addition the following integrations are possible:
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Embedded IP connectivity (e.g. Ethernet LAN/WAN) |
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Embedded BACnet protocol (BTL listed) |
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Embedded web-capability; Excel Web can be operated directly by Internet Explorer or Mozilla Firefox. |
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Embedded LON protocol - Excel Web supports up to 300 or 600 NVs. |
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| Physical I/O's can be Honeywell Smart I/O's, Smart I/O Compact, Distributed I/O's or 3rd party LON I/O's. |
Honeywell Smart I/O's offer the unique benefit of
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230 Vac or 24Vac versions |
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various point mixes |
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fixed or removable terminals |
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