Plant diagram
Figure: 2-pipe system VAV applications, heating only
Key:
DXR2… | Automation station |
| R1 | Room operator unit |
YS | Supply air VAV |
| D1 | Presence |
YH | Hot water heating coils |
| D2 | Window contact |
Sequences
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| |||
Y | Output signal |
| TR | Room temperature |
SpH | Effective heating setpoint |
| SpC | Effective cooling setpoint |
YH | Heating valve |
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Figure: Modulating heating sequence