Dehumidifier User Manual

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Humidity

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Switch

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Service

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PortOutlet

Safety and Installation Instructions

Model 1700

Dehumidifier

INSTALLER – PLEASE NOTE!

1. Installation must conform to all applicable codes.

2. A dedicated 15 Amp circuit is required for proper

operation of the dehumidifier. If a dedicated circuit

is not available, do not install unit.

3. For protection of the compressor, unit must be

transported and installed in an upright position.

If the unit was shipped or stored on its side, a 24 hour

settling period is required before running the unit.

TABLE OF CONTENTS

Safety Instructions . . . . . . . . . . . . . . .2

Overview . . . . . . . . . . . . . . . . . . . . . . .2

Specifications . . . . . . . . . . . . . . . . . . .2

Location Notes . . . . . . . . . . . . . . . . . .2

Ducting . . . . . . . . . . . . . . . . . . . . . . . .3

Drain Line . . . . . . . . . . . . . . . . . . . . . .3

Hanging . . . . . . . . . . . . . . . . . . . . . . .3

Installations

Whole House . . . . . . . . . . . . . . . . . . .4

Localized . . . . . . . . . . . . . . . . . . . . . . .6

Whole House / Localized

Convertible . . . . . . . . . . . . . . . . . . . . .8

Ventilation and Fan Cycling . . . . . . .10

Float Switch . . . . . . . . . . . . . . . . . . .12

Dip Switch Definitions . . . . . . . . . . .12

System Checkout . . . . . . . . . . . . . . .13

Troubleshooting . . . . . . . . . . . . . . . .14

Sequences

of Operations . . . . . . . . . . .Back Cover

Summary of content (16 pages)

PAGE 1
Dehumidifier Filter Access Humidity Control Inlet Filter Access Service Access Port Outlet Drain Wiring Access Wire Routing Port On/Off Switch Safety and Installation Instructions Model 1700 INSTALLER – PLEASE NOTE! 1. Installation must conform to all applicable codes. 2. A dedicated 15 Amp circuit is required for proper operation of the dehumidifier. If a dedicated circuit is not available, do not install unit. 3.
PAGE 2
SAFETY INSTRUCTIONS WARNING • This product must be installed by a qualified heating and air conditioning contractor. Failure to do so could result in serious injury from electrical shock or damage to product. • 120 volts may cause serious injury from electric shock. Disconnect electrical power before starting installation. Leave power disconnected until installation is completed. • Sharp edges may cause serious injury from cuts. Use care when cutting plenum openings and handling ductwork.
PAGE 3
DUCTING The Aprilaire Dehumidifier is supplied with two 8” round collars. These are packaged with a condensate trap inside the unit behind the filter access panel. When installing the collar make sure the foam seal uniformly contacts the cabinet and secure with 4 screws (not included). UL approved 8” diameter, insulated flexible duct is recommended for all connections. Rigid metal duct may be used. The duct should be capable of handling at least 2” w.c. of positive and 0.75” w.c. of negative pressure.
PAGE 4
WHOLE HOUSE INSTALLATION AND OPERATION In this configuration the dehumidifier will pull air from the return duct. The air passes through the dehumidifier, where moisture is removed, and then returned to the HVAC system downstream of the cooling coil in the supply plenum. This installation is used when the HVAC unit conditions the area where dehumidification is needed. Connection to the HVAC unit for the primary living space or basement HVAC unit is ideal for this installation.
PAGE 5
WHOLE HOUSE INSTALLATION AND OPERATION (CONTINUED) N.C. BACKFLOW DAMPER FIGURE 4 – WIRING DEHUMIDIFIER CONTROL 24 VAC (10 VA min) TRANSFORMER VENT DEH DAMPERS HVAC EQUIPMENT R C G G W W Y Y Y R C Rf Cf Gs Gh W HVAC EQUIP THERMOSTAT FLOAT SWITCH ODT SENSOR A B + REMOTE See page 10 for ventilation control wiring instructions. See page 10 for fan cycling wiring instructions. See page 12 for float switch wiring instructions.
PAGE 6
LOCALIZED INSTALLATION AND OPERATION In this configuration the dehumidifier will pull air from an area in the home. The air passes through the dehumidifier, where moisture is removed, and then is returned to the area. This installation is used when the HVAC unit conditions an area other than where dehumidification is needed. An unconditioned basement or crawl space application is ideal for this installation.
PAGE 7
LOCALIZED INSTALLATION AND OPERATION (CONTINUED) DEHUMIDIFIER CONTROL FIGURE 7 – WIRING VENT DEH DAMPERS HVAC EQUIPMENT R C G G W W Y Y Y R C Rf Cf Gs Gh W HVAC EQUIP THERMOSTAT FLOAT SWITCH ODT SENSOR A B + REMOTE See page 10 for ventilation control wiring instructions. See page 10 for fan cycling wiring instructions. See page 12 for float switch wiring instructions.
PAGE 8
WHOLE HOUSE / LOCALIZED CONVERTIBLE INSTALLATION AND OPERATION In this configuration the dehumidifier will automatically switch between whole-house dehumidification when the HVAC equipment is on, and localized dehumidification when the equipment is off. This installation is used to dehumidify a whole house and a separate unconditioned space like an unfinished basement, or an area where circulation from that location throughout the entire house is undesirable.
PAGE 9
WHOLE HOUSE / LOCALIZED CONVERTIBLE INSTALLATION AND OPERATION (CONTINUED) FIGURE 10 – WIRING 24 VAC (40 VA min) TRANSFORMER DEHUMIDIFIER SYSTEM DAMPERS DEHUMIDIFIER CONTROL VENT DEH DAMPERS THERMOSTAT HVAC EQUIPMENT R C G WIRE NUT G W Y Y Y W Rf Cf Gs Gh W HVAC EQUIP. R C FLOAT SWITCH ODT SENSOR A B + REMOTE See page 10 for ventilation control wiring instructions. See page 10 for fan cycling wiring instructions. See page 12 for float switch wiring instructions.
PAGE 10
VENTILATION / FAN CYCLING SETTINGS OPTIONAL VENTILATION DAMPER FIGURE 12 24 VAC (10 VA min) TRANSFORMER DEHUMIDIFIER CONTROL VENT DEH DAMPERS THERMOSTAT HVAC EQUIPMENT R R C C G WIRE NUT G W Y Y Y W Rf Cf Gs Gh W HVAC EQUIP. The Aprilaire Dehumidifier has the option to monitor HVAC heating, cooling and fan calls to assure the HVAC fan has operated a predetermined amount of time each 1/2, 1, 2 or 3 hours.
PAGE 11
VENTILATION / FAN CYCLING SETTINGS (CONTINUED) This installed option allows outside air to be combined with the fan cycling feature from the dehumidifier, provided the outside air temperature is in the acceptable range (0-100°F). Note: The dehumidifier can control the HVAC fan to provide fan cycling, regardless of whether or not an outdoor ventilation duct is installed.
PAGE 12
FLOAT SWITCH FIGURE 18 ODT SENSOR LOW VOLTAGE NORMALLY CLOSED FLOAT SWITCH FLOAT SWITCH If the Model 1700 is installed in an attic, the unit should be placed in a drain pan with a normally closed condensate overflow safety switch (also known as a float switch). The float switch should be wired to the float switch terminals on the dehumidifier control board. See Figure 18. Remove the jumper at the float switch terminals. The compressor is disabled when the float switch is open.
PAGE 13
SYSTEM CHECKOUT 1. Check the wiring to the HVAC equipment. 2. Rotate the main control knob clockwise to the “TEST” position. 3. If all is set up properly, the dehumidifier blower will turn on. The compressor will turn on after the dehumidifier blower has run for 30 seconds. After 1 minute the dehumidifier blower and compressor will shut off (“TEST” mode only). 4. If the dehumidifier blower does not activate in TEST mode, refer to the Troubleshooting Guide. 5.
PAGE 14
TROUBLESHOOTING GUIDE SYMPTOM TROUBLESHOOTING PROCEDURE / POSSIBLE REASON Dehumidifier is producing hot air. • Reheat of outgoing air will cause a temperature increase across the dehumidifier. Dehumidifier Blower is running, but no airflow. • Normally Open Damper was used instead of Normally Closed Damper in backflow. Dehumidifier not adequately dehumidifying. • Unit will need time to “dry” materials in home before effectively changing RH. • Unit will possibly run continuously initially.
PAGE 15
TROUBLESHOOTING GUIDE (CONTINUED) SYMPTOM The ventilation damper does not open when the HVAC fan is active. TROUBLESHOOTING PROCEDURE / POSSIBLE REASON • The damper will not open if the cycle time within the current period has already been met. For instance if the cycle time is set to 5 minutes and the control has already ventilated for 5 minutes in that interval, the damper will remain closed.
PAGE 16
DEHUMIDIFIER SEQUENCE OF OPERATION IF THE DEHUMIDIFIER IS NOT WIRED TO THE HVAC EQUIPMENT, THE DEHUMIDIFIER WILL SAMPLE AT THE END OF THE CYCLE PERIOD. With 3 minutes left in the Cycle Period, the dehumidifier will turn on the dehumidifier blower for 2 minutes. During this time the temperature and relative humidity are measured and the dewpoint is calculated.