Aprilaire 1750A - Ventilation; Air Cycling Settings; Air Cycling; Outside Air Ventilation

SINGLE ZONE – NOT DUCTED TO HVAC SYSTEM INSTALLATION (CONTINUED)
FIGURE 15 – Single Zone – Not Ducted to HVAC Installation
DEHUMIDIFIED SPACE
DEHUMIDIFIER
EQUIPMENT ROOM
HVAC FURNACE
DEHUMIDIFIED AIR
IS SUPPLIED
TO DUCTED SPACE
AIR IS PULLED
FROM AREA
GRILLE WITH 8" DIA.
DUCT COLLAR – 1750A
GRILLE WITH 10" DIA.
DUCT COLLAR – 1770A
10’
MINIMUM
90-1536
DUCTING & WIRING
Wiring Notes:
•Ifusingtheon-boarddehumidifiercontrol,no
additional wiring is required.
•IfwiringtoaModel76Control,wherethecontrol
will be mounted in the space being dehumidified, see
MODEL76EXTERNALCONTROLsectiononpage19.
•IfwiringtoaModel76Control,wherethecontrolwill
be located somewhere other than the space being
dehumidified, see MODEL 76 REMOTE CONTROL
section on page 20.
•IfwiringtoaModel8910HomeComfortControl
™
or Third-Party Control, see MODEL 8910 HOME
COMFORT CONTROL
™
OR THIRD-PARTY CONTROL
section on page 21.
Ducting Notes:
•Ifdehumidifyingalocationthatisnoisesensitive,
install multiple registers to reduce air velocity.
•Airflowisapproximately500CFMforthe1770A,and
275 CFM for the 1750A.
•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14.
•LeavetheLOCAL/EXTERNALswitchintheLOCALpositionifusingthe
dehumidifier’s onboard control. If installing a separate control, see MODEL 76
EXTERNALCONTROLonpage19,MODEL76REMOTECONTROLonpage20,
or MODEL 8910 HOME COMFORT CONTROL
™
OR THIRD-PARTY CONTROL on
page 21.
FIGURE 16 – Single Zone – Not Ducted to
HVAC System, DIP Switch Settings
90-1538
ON
12344321
ON
HVAC FAN OFF
PRIMARY
VENT-AUTO
VENT-TIMED
HVAC FAN ON
2 HOUR
3 HOUR
30 MIN.
1 HOUR
SYSTEM SETUP
CYCLE PERIOD
EXTERNAL
PRIMARY/SECONDARY
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settingonthecontrolknob.Ifthedewpointofthe
incoming air is above the setting, the compressor turns on and the green Status LED switches to solid illumination. If the dew point is below
the setting, the dehumidifier damper output turns off and the dehumidifier blower turns off along with the green Status LED.
•Thedewpointoftheincomingairiscontinuouslymonitoredduringcompressoroperation.Whenthedewpointoftheincomingairfallsbelow
the setting 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 (Refer to pages 19-21 for sequence with alternate controls.)
DIP SWITCH CONFIGURATION
10