Aprilaire 1850 Dehumidifier User Manual


 
SYSTEM SET-UP & CHECKOUT (CONTINUED)
Dehumidification Only
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If the dehumidifier is not already
OFF, press the ON/OFF button to
turn it off.
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Press and hold the ON/OFF button
and MODE buttons for 3 seconds.
The measured humidity, AIR
SAMPLING and TEST will show
on the display. If wired to the
HVAC system, the HVAC blower
will turn on and if there is/are
damper(s) wired to the DEH
DAMPER terminals of the control,
the damper(s) will energize.
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After three (3) minutes the
dehumidifier compressor will
turn on and DEHUMIDIFYING will
replace AIR SAMPLING on the
control screen.
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After one minute of compressor
operation, all outputs will turn off
and DONE will blink for 3 seconds
and then return to the OFF screen.
Installer Test Mode
If everything is properly wired, the dehumidifier and all of the wired components will turn on and off during Installer Test Mode to demonstrate
that all are properly operating. Installer Test Mode lasts for four (4) minutes. If the ON/OFF button is pressed during test mode, the dehumidifier
will exit Installer Test Mode and return to the OFF screen.
Zoning and/or Ventilation
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If the dehumidifier has been set
up for ventilation, VENTILATING
will appear on the display
throughout Installer Test Mode,
and the ventilation damper will be
energized.
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If the dehumidifier has been set
up for zoning, PRIMARY ZONE will
show on the display for the first
minute of dehumidifier blower
operation. After one minute,
SECONDARY ZONE will show on
the display and the zone dampers
will de-energize.
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