Alternate External Dry Contact Control As Driving Control - Anden SURNA S710V1 Directives D'installation Et Mode D'emploi

ALTERNATE EXTERNAL DRY CONTACT CONTROL AS DRIVING CONTROL

When a dry contact control is used to control the first dehumidifier, Unit #1 must be set to ENABLE EXTERNAL in the set-up menu� All downstream
units must be set up to ENABLE EXTERNAL in each set-up menu� See page 12 for set up details and wire as shown in FIGURE 13�
SEQUENCE OF OPERATION
Each unit in the daisy chain responds to the first unit being controlled by the external control� When the humidity level rises above the humidity
setting, all units will dehumidify until the humidity measured by the external control falls below the setting�
IMPORTANT: If the external control experiences a fault, all downstream dehumidifiers will also stop function� If any dehumidifier experiences a fault,
that unit will stop operation as determined by the fault but all other units will continue operating� If any unit loses power, all downstream units will
stop function�
FIGURE 13 – WIRING WITH ALTERNATE EXTERNAL CONTROL
UNIT #2 UNIT #3
UNIT #1
SET UP FOR EXTERNAL CONTROL SET UP FOR EXTERNAL CONTROL
SET UP FOR EXTERNAL CONTROL
+ - A B ODT DEH + - A B ODT DEH + - A B ODT DEH
Remote Sensor Vent Remote Sensor Vent Remote Sensor Vent
TO APRILAIRE 88XX SERIES CONTROL
OR OTHER EXTERNAL DRY CONTACT CONTROL
90-2509
English 11