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Access 4.x |
Plate exchanger configuration example |
The airflow through the exchanger is controlled by a shut-off damper and a by-pass damper. Both dampers are controlled by the same "Exchanger" type sequence.
The table below shows a configuration example of the hardwired plate exchanger.
Variable |
Available options & Selection |
Note |
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Sequence selection |
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Configuration > Functions > Function activation > Heating/Cooling sequence setup |
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Sequence for exchanger |
| SEQ-A | SEQ-B Exchanger |...| |
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Sequence settings |
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Configuration > Functions > Function activation > Heating/Cooling sequence setup > Exchanger |
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Type of sequence |
|Cooling | Exchanger | Heating | Damper | Fan setpoint compensation | |
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Type of exchanger |
| Rotary | Plate | Liquid | |
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Digital start output |
| No | Yes | |
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Type of defrosting |
| None | Temperature monitoring | Pressure monitoring | Section defrosting | |
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Sequence output when recirculation/support |
| 0% | 100% | Auto | |
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Sequence output min limit |
0% |
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Sequence output max limit |
100% |
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Sequence output when the unit is stopped |
0% |
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PID Settings |
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Configuration > PID controllers > Exchanger |
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P-band |
10 oC |
PID settings for the sequence |
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I-time |
100 s |
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D-time |
0 s |
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Hardwired interface to the Exchanger controller |
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Configuration > I/O allocation settings > |
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Analog outputs > Exchanger (SEQ-B) |
Any available I/O |
Sequence output to the exchanger controller |
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Sequence control settings |
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Data & Settings > Temperature control > Exchanger |
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Start delay exchanger |
0 s |
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100% exchanger at start up |
2 s |
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Graphical representation |
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Flowchart |
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75% - indication of sequence output Exchanger open 75% By-pass open 25% |
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