Submittal Sheet

SPECIFICATION SHEET
DEHUMIDIFIER
MODEL 1770A
PRINCIPLE OF OPERATION
The Aprilaire Model 1770A is designed to dehumidify the
air coming into the unit by passing the incoming air over an
evaporator coil to drop the air temperature below the dewpoint
of the air. Moisture is removed from the air and drained out of the
unit to a common floor or waste drain. The air is then reheated in
the condenser coil and exits the unit.
Dehumidification occurs until the set dewpoint is reached, then
shuts off until periodic sampling determines a need for operation.
Do not use the 1770A in pool areas. Chemicals in the air will
cause degradation of the components in the dehumidifier.
VENTILATION
The Model 1770A has the ability to bring in fresh air. Fresh air
will dilute stale air and pollutants and will reduce humidity in the
winter months. The fresh air is brought in through a 6” round duct
and 6” round normally closed damper. The dehumidifier has built
in controls to adjust the amount of fresh air that is brought in.
The Aprilaire dehumidifiers are not designed for pool applications
or any application where airborne chemicals are present.
Do not use a dehumidifier to prevent window condensation during
the winter. Indoor humidity levels must typically get lower than
what dehumidifiers can achieve during cold winter months. Use
ventilation to control high winter indoor RH, such as the Aprilaire
dehumidifiers ventilation feature, Aprilaire Model 8126 or Aprilaire
Model 8100 or Aprilaire Model 8910 Home Comfort Control.
PRODUCT SPECIFICATIONS
Capacity
*
135 ppd
Energy Factor
*
1.8 L/kW-h
Airflow @ Varying E.S.P.
(external static pressure - dry coil)
0.0” w.c. 580 CFM
0.3” w.c. 565 CFM
0.6” w.c. 530 CFM
0.9” w.c. 500 CFM
Voltage, Phase, Frequency 120V, 1Ф, 60 Hz
Current draw
*
14.5 A
Noise 53 dBA ducted
67 dBA unducted
Dimensions Width: 20.75” w/filter doors
Height: 19.62” cabinet, 20.62” - 22.62” w/ leveling feet
Length: 24” cabinet, 29” w/collars
Operating Conditions
Inlet Air Operating Conditions 50°F - 105°F, 40°F dew point minimum
Ambient/Ventilation 40°F - 140°F, 0% - 95% RH (non-condensing)
Weight 100 lbs.
*
Rated capacity and Energy Factor test done and current draw measured in accor-
dance with AHAM DH-1 2008 at 80°F/60% RH inlet air at 500 CFM.
PRODUCT FEATURES
Capacity at 550 CFM in Non-Rating Conditions
70°F / 60% RH = 118 ppd 80°F / 50% RH = 104ppd
65°F / 60% RH = 101 ppd 70°F / 50% RH = 79ppd
60°F / 60% RH = 66 ppd 65°F / 50% RH = 65ppd
Controls Build-in Automatic Control or Model 76 Control
(Accessory)
Cabinet Insulation 1” Foil Faced EPS
Discharge Orientation End opposite inlet
Inlet/Outlet Duct Collars 8” dia.
Backdraft Damper at Outlet Included
Filter 1” washable, MERV 8
Refrigerant R410A
8’ Power Cord Plug Type
NEMA 5-20P
Discharge Air Temperature Rise 10°F-30°F
Warranty 5 Year
Drain 0.75” PVC; trap and 90° elbow included