Model 1830, 1850 & 1850W Dehumidifier Installation Instructions Safety Instructions WARNING 1. 120 Volts may cause serious injury from electric shock. Disconnect electrical power before starting installation or servicing. Leave power disconnected until installation/service is completed. 2. Sharp edges may cause serious injury from cuts. Use care when cutting plenum openings and handling duct work. 3. Dropping may cause personal injury or equipment damage.
Table of Contents Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications Model 1830 Model 1850 & 1850W 67 lbs. 70 lbs. 70 pints per day @ 160 CFM 95 pints per day @ 265 CFM 6.3A operating current 8A operating current Weight Capacity AHAM DH-1-2008 80°F, 60% RH Conditions Power 115 VAC, Single Phase, 60Hz Dehumidifier Inlet Air Conditions Dehumidification: 50°F – 104°F, 40°F dew point minimum Ventilation: 40°F – 140°F, 0%RH – 99%RH (non-condensing) Filter Airflow MERV 8, washable External Static Pressure ("w.c.
SET UP DEHUMIDIFIER FOR INSTALLATION (continued) DUCT COLLARS standard basement and attic installations (fully ducted) • Use the screws in the parts bag to attach the duct collars to the inlet and outlet of the dehumidifier. The outlet collar has a backflow damper. • The outlet duct collar may be attached to the top or end of the unit. Move the outlet cover to the location not being used. See Figure 2. • Make sure there are no bends in the ductwork coming off the outlet for a minimum of 4”.
SET UP DEHUMIDIFIER FOR INSTALLATION (continued) CONTROL LOCATION The on-board control can be located on the top of the dehumidifier or can be relocated to the front of the dehumidifier if the control can not be seen/accessed in the top orientation. To move the control: 1. Remove the front control panel cover. 2. Remove the filter access door and filter. Figure 5 – Control Location CONTROL CONTROL PANEL COVER CONTROL CONTROL PANEL COVER 3.
HARD WIRING WARNING CAUTION ELECTRICAL SHOCK HAZARD: 115-volts may cause serious injury or death from electrical shock. Disconnect and tag electrical service before starting installation or field-service. Leave electrical service disconnected until installation or field-service is complete. ELECTRICAL SHOCK HAZARD: An interrupted or broken ground may cause property damage, serious injury or death should an electrical fault occur.
HARD WIRING (continued) WIRING INSTRUCTIONS 1. Disconnect electrical service at the main fuse or circuit breaker box. 2. Install any code required electrical disconnects to the line service. FIGURE 6 – Electrical Service Box Location 3. Remove the side panel and electrical service panel from the dehumidifier. See Figure 6. SIDE PANEL 4. Model 1830 only: Disconnect the power cord connections from the terminals in the electrical service box. See Figure 7. 5.
LOCATION CONSIDERATIONS • Allow sufficient clearance for filter removal and to prevent airflow obstruction • Electrical service access will require the removal of the side panel shown. Allow sufficient space for service on this side of the unit. Figure 8 – Filter Access Clearance ELECTRICAL SERVICE ACCESS THIS SIDE 6" MINIMUM CLEARANCE FOR PROPER AIR FLOW • If locating the unit in an attic or crawl space, a Model 76 Control mounted in the living space is recommended.
DRAIN INSTALLATION The drain outlet on the dehumidifier can be hard piped using 3/4” nominal drain tubing or the provided fittings and 1/2” clear PVC tubing can be used to drain the dehumidifier. Always maintain a constant downward slope from the dehumidifier to the drain and do not allow soft tubing to curl up which may result in air lock. LEVELING The feet can be adjusted to level the unit, and if required, to accommodate drain fittings and a secondary condensate pan.
DUCTING TO HVAC SYSTEM – BASEMENT AND ATTIC INSTALLATIONS The Preferred Installation is to duct the dehumidifier to pull air from and return dehumidified air to the HVAC return duct. This installation will ensure warm, dehumidified air is thoroughly mixed with the HVAC system air before being discharged into the living space. Alternatively, the dehumidifier can be ducted to discharge to the supply duct, but the external static pressure of the HVAC system must not exceed 0.4”w.c. for the 1830 and 0.6”w.c.
DUCTING TO HVAC SYSTEM – CLOSET INSTALLATIONS The dehumidifier in these applications is typically installed under or next to the HVAC equipment. In both types of installation, the dehumidifier inlet is not ducted and pulls from the living space through a grille or louvers in the HVAC closet door. The Preferred Installation is to locate the dehumidifier under the HVAC equipment and supply dehumidified air through the alternate outlet on the top of the unit directly to the HVAC return.
DUCTING FOR TWO ZONE INSTALLATIONS In this installation the dehumidifier controls the humidity in two separate zones, a Primary and Secondary Zone. The dehumidifier will dehumidify the Primary Zone as the first priority, and will switch to the Secondary Zone after the dehumidification needs of the Primary Zone have been satisfied. IMPORTANT: Normally Closed dampers must be installed in the ducts serving the Primary Zone and Normally Open dampers installed in the ducts serving the Secondary Zone.
MODEL 76 – EXTERNAL CONTROL OR CRAWL SPACE/SEALED ATTIC CONTROL AND WIRING NOTE: Use 18-22 AWG wire for control wiring. FIGURE 20 – Model 76 External Control Wiring EXTERNAL CONTROL NC NO FLOAT DH DH Switch + - A B ODT VENT DEH Remote Sensor Dampers Gh Rf Cf Gs W Y HVAC EQUIP. Used as an external control, the Model 76 is mounted in the space that is to be dehumidified.
WIRING THE DEHUMIDIFIER TO THE HVAC SYSTEM AND ZONE DAMPERS NOTE: Use 18-22 AWG wire for wiring to HVAC system and zone dampers. FIGURE 22 – Wiring to HVAC System Pull off the wiring access cover near the dehumidifier control to access the wiring terminals. Snap the wiring access cover back into place after completing all wiring.
SYSTEM SET-UP & CHECKOUT If dehumidifier installation does not include ventilation or zoning and will not be wired to an external control, remote control or the HVAC system, proceed to Installer Test Mode section on page 17. Ventilation If not using the dehumidifier to bring in outdoor air, press MODE to go to ZONE screen selections. 1. Check all wiring. 2. Make sure the wire access cover has been snapped back onto the on-board control. 90-1854 3. Plug unit in and turn power switch to ON.
SYSTEM SET-UP & CHECKOUT (continued) Zone DEH W/AC If installing the dehumidifier in a single zone application, select DISABLED and press MODE to go to the EXTERNAL control screen selections. To allow dehumidification during active air conditioning, select ENABLED and press MODE. 90-1854 90-1854 90-1854 If installing the dehumidifier in a two-zone application, use the UP or DOWN arrows to select ENABLED and press MODE to go to the EXTERNAL control screen selections.
SYSTEM SET-UP & CHECKOUT (continued) 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.
START UP AND SEQUENCE OF OPERATION SINGLE ZONE WHOLE HOUSE OR STAND ALONE USING THE DEHUMIDIFIER CONTROL 1. Press the ON/OFF button to turn the dehumidifier control ON. The display will show the current setting, and the dehumidifier blower and HVAC blower (if wired to the HVAC system) will turn on to start sampling the air. The setting will be replaced by the measured humidity and “AIR SAMPLING” will show on the display. 2. Use the UP or DOWN button to adjust the humidity setting as desired.
VENTILATION The dehumidifier can activate a normally closed damper to bring in outdoor air through a fresh air intake duct. This feature can not be used when a Model 76 has been installed in a Remote Control application, and is not recommended for two-zone installations. Required Components Aprilaire Model 6506, Normally Closed Damper 6” Insulated Duct for Fresh Air Intake Duct 24 VAC Transformer (10VA min.
VENTILATION (continued) VENT-AUTO & VENT-TIMED The dehumidifier can ventilate in four modes. Vent-Timed: Ventilation occurs based only on time setting; no temperature restrictions. Vent-Auto-B: Ventilation prevented when outdoor temperature is below 0°F and above 100°F. Between 0°F – 20°F ventilation is only allowed during a HVAC heat call. Vent-Auto-C: Ventilation prevented when outdoor temperature is below 0°F and above 100°F.
VENTILATION (continued) DETERMINE VENTILATION REQUIREMENTS CALCULATING AIRFLOW REQUIREMENT Table 1 – CFM Required 1. The MINIMUM ventilation requirement is calculated using ASHRAE 62.2-2010. House Sq. Ft. ASHRAE Airflow in CFM = [House Area in Sq. Ft. x 0.01] + [(Number of Bedrooms +1) x 7.5] N OTE: Use ‘Number of Bedrooms + 1’ or ‘Number of Occupants’, whichever is larger. 2. Table 1 shows the calculated airflow values to the nearest 5 CFM. 3. Record the required CFM.
VENTILATION (continued) TABLE 3 – Cycle Time Setting (minutes) for Airflow Delivered vs.
VENTILATION (continued) SEQUENCE OF OPERATION When wired as shown in Figure 26, the ventilation damper will open whenever there is an HVAC heating (W), cooling (Y) or fan (Gs) call, allowing fresh air to be brought in when the HVAC blower is running (see VENTILATION WITH AN EXTERNAL CONTROL section below for exceptions). The ventilation damper will also open if the dehumidifier is operating. “VENTILATING” will show on the dehumidifier control when the dehumidifier is actively ventilating.
TROUBLESHOOTING Technical Support is available Monday through Friday, 7:00 a.m. to 5:00 p.m. CST, at (800) 334-6011. Use the guides on the following pages to identify and correct system faults. Contact Technical Support before replacing the unit or any components and for additional troubleshooting. DIAGNOSTIC CODES When an error occurs, the Diagnostic Code along with SERVICE REQUIRED will be displayed on the control screen.
TROUBLESHOOTING (continued) TABLE 4 – Diagnostic Codes (continued) Diagnostic Code Failure Mode Action Reset E7 Float Switch Open 1. Empty the condensate pan. 2. Check the float switch connection at the control board. 3. If not using a float switch, verify jumper is between float switch terminals on dehumidifier control board. 4. If the problem persists, replace the float switch. Self-Correcting E8 Inlet Air Temperature Out of 50°F – 104°F or dew point below 40°F 1.
TROUBLESHOOTING (continued) TABLE 5 – Troubleshooting Guide Symptom Possible Reason Troubleshooting Procedure Dehumidifier does not turn on/run. No power to unit. • Check that the dehumidifier is plugged in. • Check that the power switch is turned ON. • Check that the control is turned ON. • Check that the circuit breaker has not tripped. Dehumidifier blower is running but with little or no airflow. Pressure drop across dehumidifier is higher than 0.4”w.c. for Model 1830 or 0.6”w.c.
SERVICE PARTS 4 18 5 3 9 1 10 13 7 11 14 17 2 15 8 12 6 16 90-1906 19 No. Part Description Part No. No. Part Description Part No.
P.O. Box 1467 • Madison, WI 53701-1467 • Phone: 800/334-6011 • Fax: 608/257-4357 • www.aprilairepartners.com 10010759 2.14 B2206316A Printed in U.S.A.