Access 5.x

Rotary exchanger configuration example


Rotational speed of the rotary heat exchanger is controlled either via internal data bus or analog signal (in hardwired rotary drive option).


The table below shows a configuration example of the hardwired rotary exchanger control with alarm monitoring.



Variable

Available options & Selection

Note


Sequence selection

Configuration > Functions > Function activation > Heating/Cooling sequence setup

Sequence for exchanger

| SEQ-A | SEQ-B Exchanger |...|



Sequence settings

Configuration > Functions > Function activation > Heating/Cooling sequence setup > Exchanger

Type of sequence

|Cooling | Exchanger | Heating | Damper | Fan setpoint compensation |


Type of exchanger

| Rotary | Plate | Liquid |


Digital start output

| No | Yes |


Exchanger alarm

| No | Yes |


Type of defrosting

| None | Temperature monitoring |


Frost prevention rotating exchanger

| No | Yes |


Sequence output when recirculation/support

| 0% | 100% | Auto |


Sequence output min limit

0%


Sequence output max limit

100%


Sequence output when the unit is stopped

0%



PID Settings

Configuration > PID controllers > Exchanger

P-band

10 oC

PID settings for the sequence

I-time

100 s

D-time

0 s


Hardwired interface to the Exchanger controller

Configuration > I/O allocation settings >

Digital inputs > Rotary exchanger alarm

Any available I/O

Alarm input from exchanger controller.

Alarm 3070 Rotary exchanger alarm if DI is tripped

Analog outputs > Exchanger (SEQ-B)

Sequence output to the exchanger controller


Sequence control settings

Data & Settings > Temperature control > Exchanger

Start delay exchanger

0 s


100% exchanger at start up

2 s



Graphical representation

Flowchart


75% - indication of sequence output