Aprilaire 1750A Dehumidifier User Manual


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SPOT INSTALLATION (CONTINUED)
FIGURE 14 – Spot Ducted Installation
OUTSIDE AIR TO HOUSE
LIVING SPACE
SUPPLY DUCT
RETURN DUCT
FLOOR DRAIN
DEHUMIDIFIER
115 VAC
CIRCUIT
EQUIPMENT ROOM
CONDENSATE HOSE
(TO COMMON DRAIN
OR OUTSIDE)
HVAC FURNACE
DEHUMIDIFIED AIR
IS SUPPLIED
TO DUCTED SPACE
AIR IS PULLED
FROM AREA
GRILLE WITH
8" DUCT COLLAR
90-1536
DUCTING & WIRING
Wiring Notes:
•Noadditionalwiringrequired.
•IfwiringtoaModel70LivingSpaceControl,see
MODEL 70 LIVING SPACE CONTROL section on
page 16.
•Ifwiringtoathird-partycontrol,seeTHIRD-PARTY
CONTROL section on page 17.
•CYCLEPERIOD:Thisdetermineshowfrequentlythedehumidifierwillsample
the air to check the humidity level. Set to 1 hour and adjust as needed.
•ForVentilationswitchsettings,seeVENTILATIONsectionbeginningonpage12.
•ForLocal/Externalswitchsetting,seeTHIRD-PARTYCONTROLonpage17.
FIGURE 15 – Spot DIP Switch Settings
90-1538
ON
1 2 3 44321
ON
HVAC FAN OFF
WHL HOUSE
VENT-AUTO
VENT-TIMED
HVAC FAN ON
2 HOUR
3 HOUR
30 MIN.
1 HOUR
SYSTEM SETUP
CYCLE PERIOD
EXTERNAL
CONVERTIBLE
LOCAL
•SamplingwilloccurattheendoftheCyclePeriod.Attheonsetofsampling,thedehumidifierdamperoutputturnson,thedehumidifierblower
turns on, and the green Status LED flashes.
•Afterthreeminutes,thedewpointoftheincomingairismeasuredandcomparedtothesetpointonthecontrolknob.Ifthedewpointof
the incoming air is above the set point, the compressor turns on and the green Status LED switches to solid illumination. If the dew point is
below the set point, the dehumidifier damper output turns off and the dehumidifier blower turns off along with the green Status LED. The next
sampling will occur at the end of the next Cycle Period.
•Thedewpointoftheincomingairiscontinuouslymonitoredduringcompressoroperation.Whenthedewpointoftheincomingairfallsbelow
the set point on the control knob, the dehumidifier damper output turns off and the dehumidifier compressor and blower turn off along with
the green Status LED.
SEQUENCE OF OPERATION
DIP SWITCH CONFIGURATION
9
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