Aprilaire 1730A User Manual

Model 1730A Compact Dehumidifier

TOP VIEW

FILTER

12" MINIMUM CLEARANCE
FOR FILTER
(EITHER SIDE)

6" MINIMUM CLEARANCE
FOR PROPER AIR FLOW

a

b

c

d

e

f

g

Installation Instructions

WARNING

1. 120 volts may cause serious injury from electric shock. Disconnect electrical power
before starting installation. Leave power disconnected until installation is complete.

2. Sharp edges may cause serious injury from cuts. Use care when cutting plenum
openings and handling ductwork.

3. Dropping may cause personal injury or equipment damage. Handle with care.

4. Do not remove the inlet or outlet screen. Both screens are required to protect from
moving parts and electrical components.

SPECIFICATIONS

Dimensions: Width: 12.5” cabinet, 13” with doors

Height: 14.5” cabinet, 17” with 2.5” leveling feet
Length: 22” cabinet, 27” with collars

Weight: 65 lbs.
Capacity: 65 pints/day @ 150 cfm

AHAM DH-1-2003 80°F, 60% RH conditions

Efficiency: 1.8 Liters per kilowatt hour

AHAM DH-1-2003 80°F, 60% RH conditions

Power: 115VAC, 60 Hz, 8A Operating Current

Unit equipped with 8 ft. grounded power cord
Dedicated 15 Amp circuit recommended

Airflow:

Inlet Air Operating Conditions: 60°F to 95°F, 30% RH to 99% RH
Installation Conditions: 40°F to 140°F, 0% RH to 99% RH
Evaporator Frost Sensor: 25°F +/- 5°F, circuit opens (cut-out)

Filter: MERV 8, washable
Dehumidistat Control Accuracy: +/- 6%RH with +/-6% Differential

P ("w.c.) Airflow (cfm)

0.25 190

0.50 150

CAUTION

1. Do not use in pool applications.

2. If unit has been shipped or stored on
its side, wait 24 hours before running.

3. Do not use solvents or cleaners on or
near the circuit board.

0 230

55°F +/- 5°F, reset temperature (cut-in)

LOCATION CONSIDERATIONS

1. Install Unit Indoors: Do not expose to elements.

2. Drain Accessibility: If a drain is not located in the

installation area, a condensate pump may be required.

3. Power: Dedicated outlet within 8 feet of unit.

4. Filter Access: Allow for 12” clearance on one side of
the unit for removal of filter. (Figure 1)

5. Inlet: If inlet is not ducted, a minimum of 6” of open
space is required from the inlet panel to an adjacent
surface.

UNPACKING AND CONTENTS

Do not tip unit to remove from carton.

1. Open carton completely using cut line shown along bottom
perimeter of carton.

2. Remove all cardboard inner pack (top edges and duct collars).

3. See Figure 2 for opening view and contents.

a. Installation Manual
b. Owner’s Manual
c. Dehumidistat (mounted to inlet panel)
d. Bag with Dehumidistat Cover Plate, Screws (2), Anchors (2)
e. Outlet with Back Flow Damper
f. 8 ft. Grounded Power Cord
g. Wiring Access Panel

FIGURE 1 – Filter
Access Clearance

90-1426

FIGURE 2 – Carton
Opening & Contents

90-1464

SET-UP

2-1/8" CLEARANCE
FOR LEVELING FEETVIBRATION ISOLATORS

FILTER ACCESS DOOR

OUTLET

INLET

5-1/8"

SUPPLY COLLAR

The dehumidifier can be installed as shipped, with the supply collar
on the outlet panel, or if space is restricted, the supply collar can be
relocated to the top of the unit.

TOP MOUNT SUPPLY COLLAR (FIGURE 3)

1. Remove the four screws securing the supply collar (with backflow
damper) and screen to the outlet panel.

2. Remove the four screws securing the top mounted outlet cover plate.

3. Attach screen and supply collar with damper to the top of the unit.

4. Attach outlet cover plate to the outlet panel.

DEHUMIDISTAT LOCATION

The dehumidistat mounted to the dehumidifier can remain on the unit
or be removed and mounted in the living space. Attic installations
require that the dehumidistat be moved to the living space.
Note: Any dry contact, normally open humidity control can be used
as the controlling device for the dehumidifier. If using a control other
than the one provided, remove the dehumidistat as described in
steps 1-6 in the WIRING, Dehumidistat Wall Mount Installation
section. Follow steps 7-10 to wire an alternate control.

FIGURE 3 – Top Mount Supply Collar

Supply collar
mounted to
top of unit

Outlet cover
plate moved to
outlet panel

WALL MOUNT LOCATION

OUTLET VIEW

90-1425

• Mount approximately 5 feet above the floor on an inside wall of the

living space.

• Do not locate dehumidistat in the direct path of drafts from open

doors and windows.

• Do not install where operation might be affected by lamps, outside

sources of humidity (i.e. shower), fireplace, registers, or radiators.

MECHANICAL INSTALLATION

DRAIN

Run vinyl or pvc tubing from the 3/4” drain outlet on the dehumidifier inlet to a floor drain. Make sure the drain line has a constant downward
slope and is not kinked. Refer to local codes to determine if a p-trap is required. In attic installations a drain pan with float switch is required.
See Float Switch section for wiring instructions.

SUSPENDED INSTALLATION

If hanging the unit, use 1/4” threaded rod and two unistruts to
support the base just inside the leveling feet. It is recommended that
vibration isolators be placed between the unistruts and dehumidifier
base. See Figure 4. Do not position threaded rods over filter access
doors. There must be a minimum clearance of 12” on one side of the
unit to allow for removal of the filter.

FIGURE 4 – Suspended Installation

90-1427

2

DUCTING

HVAC / FURNACE

115 VAC

DEDICATED

CIRCUIT

DEHUMIDIFIER

SUPPLY DUCT

RETURN
DUCT

A-COIL

DEHUMIDIFIED AIR IS SUPPLIED

DOWNSTREAM FROM A-COIL TO

MINIMIZE EVAPORATION OFF A-COIL

AIR IS PULLED
FROM MAIN
RETURN DUCT

DEHUMIDISTAT WITH
SET POINT KNOB

CONDENSATE HOSE

(TO COMMON DRAIN OR OUTSIDE)

MAIN RETURN
DUCT

DEHUMIDIFIER

MAIN SUPPLY DUCT

CONDENSATE

HOSE

(TO COMMON

DRAIN OR
OUTSIDE)

PRINCIPAL

LIVING SPACE

115 VAC

DEDICATED

CIRCUIT

AIR FILTER

ACCESS

DOOR

HVAC/FURNACE SYSTEM
SHOWN IN HORIZONTAL
ORIENTATION

DEHUMIDIFIED AIR IS SUPPLIED

DOWNSTREAM FROM EVAPORATOR COIL

TO MINIMIZE EVAPORATION OFF COIL

HVAC EVAPORATOR COIL

RELOCATE DEHUMIDISTAT

TO LIVING SPACE

DEHUMIDIFIED AIR IS SUPPLIED
DOWNSTREAM FROM A-COIL TO
MINIMIZE EVAPORATION OFF A-COIL

115 VAC

DEDICATED

CIRCUIT

A-COIL

SUPPLY DUCT

HVAC / FURNACE

CONDENSATE HOSE

ON DEHUMIDIFIER

(TO COMMON DRAIN

OR OUTSIDE)

DEHUMIDIFIER

The dehumidifier is supplied with two 8” round collars. An integral backflow damper is installed in the outlet collar. In a ducted installation, the
dehumidifier pulls air from the living space or HVAC return duct and supplies the dehumidified air to the HVAC supply duct (See Figures 5, 6 & 7).

DUCTED INSTALLATION

• Move supply collar to the desired location, if necessary. (See Supply Collar in SET-UP Section)

• The unit can be ducted to the supply or both the return and supply. The dehumidifier inlet ducting must be a minimum of 6” upstream of the

HVAC system air cleaner and the outlet must be ducted a minimum of 6” downstream of the cooling coil.

• Use the least amount of ductwork possible. To ensure best performance, do not exceed a total of 50 feet of duct installed in accordance with

SMACNA Standards. UL approved, 8” diameter, insulated duct is recommended for all connections.

• All joints and seams must be sealed.

FIGURE 5 – Basement Installation

FIGURE 7 – Attic Installation

90-1423

FIGURE 6 – Equipment Room/Closet Installation

90-1423

Note 1: Attic installations require the following.

1. The dehumidistat must be removed from the
unit and relocated in the living space. An
insulated cover plate is provided to cover the
dehumidistat opening.

2. The dehumidifier must be installed in a
secondary drain pan with a float switch.

Note 2: Vibration isolators placed under the
dehumidifier feet are recommended when the
dehumidifier is installed on ceiling joists.

90-1423

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