Aprilaire 65 Digital Manual Humidifier Control Installation Guide

: October 27, 2023
: Aprilaire

Table of Contents

65 Digital Manual Humidifier Control
SAFETY INSTRUCTIONS
OVERVIEW
SPECIFICATIONS
MATERIAlS PROVIDED
IOCATION RECOMMENDATIONS
INSTAIIATION
SEQUENCE Of OPERATION
TROUBIESHOOTING
Documents / Resources

Model 65 Humidifier Control
Installation Instructions

65 Digital Manual Humidifier Control

READ AND SAVE THESE INSTRUCTIONS
The Model 65 is for use with any humidifier requiring an ON/Off signal for a 24 volt circuit.

SAFETY INSTRUCTIONS

WARNING

Improper installation may cause property damage or injury. Installation, service, and maintenance must be performed by a qualified service technician.
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. This control is not a 120 Volt (line voltage) device.

CAUTION

Read all instructions before beginning installation.
Do not adjust humidity set-point above recommended level or to recommended level if condensation occurs on inside surface of windows or on other surfaces. Excess condensation can cause damage to structure or furnishings. Excess moisture can also allow the possibility for mold growth to occur.
Do not use solvents or cleaners on or near the display and circuit board. Chemicals can damage components.

OVERVIEW

The Aprilaire ® Model 65 Humidifier Control provides control of the humidifier from the living space . The control allows the homeowner to set and adjust the humidity setting and turn the humidifier on or off from a convenient location . The Model 65 uses an onboard sensor to monitor the relative humidity in the space in which it is located and displays the measured relative humidity on the digital display .

SPECIFICATIONS

EIECTRICAI

Input Voltage and Current| Voltage: 24V AC +/-20% Current: 25mA (nominal), 50mA (max .) at 24V AC
Output| Dry Contact, Normally Open – H Terminals
CONTROl

MATERIAlS PROVIDED

MATERIAlS PROVIDED

Wall-Mount Control
Mounting Screws
Drywall Anchors
RH Setting Label

MATERIAlS NOT PROVIDED

Wires
Wire Nuts

A self-adhesive label (RH Setting Label) showing recommended RH settings based on outdoor temperature is provided . The label can be attached to the front of the control to serve as a guideline and a reminder for the homeowner to adjust the RH setting as outdoor temperature changes .

IOCATION RECOMMENDATIONS

MOUNT CONTROl

In an area the homeowner wants to monitor and control moisture levels .
On an interior wall.
Approximately 5’ off the floor.
At least 18” from an outside wall. See figure 1 .

DO NOT MOUNT CONTROI

In the flow of a supply register.
Behind doors, in corners or other dead air spaces.
In direct sunlight, near lighting fixtures, or other appliances that give off heat .
On an outside or unconditioned area wall.
In stairwells or near outside doors.
On a wall with concealed pipes or ductwork.

Aprilaire 65 Digital Manual Humidifier Control - fig1

INSTAIIATION

MOUNT CONTROI

See figures 2 & 3 .

Remove front cover by pulling straight out .
Position the back plate on the wall and mark the locations for the wire access hole and the mounting screws .
NOTE: The mounting holes can also be used to secure the back plate to a standard horizontally mounted junction box .
For mounting on drywall, drill two 3/16” dia. mounting holes and a 3/4” opening for the wires.
Insert the drywall anchors provided into the mounting holes flush with the wall surface .
Run 4-wire cable from the humidifier to the control location .
Secure back plate using the two #8 x 1-1/2” screws provided.
After connecting the wires, tuck excess wire into the wall and fill the opening with insulating material . Failure to seal the opening may result in inaccurate operation due to drafts .

|
---|---

WIRING
WIRING – Model 65 with Aprilaire Model 400, 500, 600, and 700 Series Evaporative Humidifiers

The Model 65 control requires 24VAC . Drawing power from the HVAC system is the recommended method for this installation . See figures 4 & 5 .

Disconnect power to the humidifier and HVAC system .
Connect the C and R terminals on the Model 65 to the HVAC or thermostat C and R terminals .
Connect Model 65 H terminals to the humidifier solenoid valve control circuit as shown .
Snap the front cover onto the back plate. The 4-pin terminal aligns with the terminal block receptacle on the back plate.
Proceed to SYSTEM CHECKOUT on page 9 .

|
---|---

WIRING – Model 65 with Model 800 Steam Humidifier The Model 65 control requires 24VAC . See figure 6 .

Disconnect power from the Model 800 and HVAC system.
Connect 24VAC to the C and R terminals on the Model 65 .
Connect the H terminals on the Model 800 to the H terminals on the Model 65.
Snap the Model 65 front cover on the back plate. The 4-pin terminal aligns with the terminal block receptacle on the back plate.
Proceed to SYSTEM CHECKOUT on page 9 .

NOTE: If the Model 800 Steam Humidifier is installed with a Model 850 Fan Pack, the Model 65 Control can be powered from the 24VAC secondary wires on the Model 800 transformer, by splicing into the wires using tap connectors . See figure 7 .

|
---|---

SYSTEM CHECKOUT

POWER UP

Check all wiring.
Restore power to the HVAC system and humidifier .
After a 4 second start up sequence all buttons on the Model 65 will be functional .
• The control will be OFF.
• The humidity setting will be 30%.
• The control will display the measured humidity.

TEST MODE

Press and hold the ON button for 5 seconds to enter Test Mode .
a. Verify all LCD segments blink every second.
b . Verify humidifier turns on .
After 5 minutes or after pressing the OFF button, the control will enter Off mode . Verify the humidifier turns off .

HUMIDITY SETTING

• The control must be ON to adjust the humidity setting.
• The (up) and (down) buttons are used to increase or decrease the humidity setting .
• The first press of either button will display the current setting on the LCD display and SET will be displayed below the % sign .
• Each subsequent push of the up or down buttons will change the setting by 1%.
• If a button is held down, the setting will continually change by 1% every 1/2 second for as long as the button is pressed .
• The control will return to Normal Mode, displaying the measured humidity, 5 seconds after the last button press/release .

OFFSET

An offset can be applied to the humidity reading to avoid discrepancies with other humidity measuring devices in the home. Allow 48 hours for the control to acclimate before applying an offset . The control must be ON to enter the Offset screen .

Press and hold the OFF button for 5 seconds to enter the Offset screen . See figure 9 .
The buttons can be used to set an offset value between -5% RH and +5% RH .
The control will return to Normal Mode, displaying the measured humidity, 5 seconds after the last button press/release .

TURNING ON AND SETTING CONTROl

Press the ON button .
Use the buttons to set the control at 30% .
Increasing the humidity setting will increase humidifier run time, resulting in higher humidity levels .
Decreasing the humidity setting will decrease humidifier run time, resulting in lower humidity levels .

SEQUENCE Of OPERATION

Normal Mode

When the measured humidity is lower than the setting, the control will activate the humidifier, and ON will blink on the LCD display.
When the measured humidity increases to 3% RH above the setting, the control will deactivate the humidifier, and the LCD will display a solid ON .

Operating limits

If the control senses temperature below 40°F or above 99°F, the control will not allow the humidifier to operate, and ON and* will blink on the display.
The control will resume normal operation once the temperature is within the specified limits.

TROUBIESHOOTING

Technical Support is available Monday through Friday, 7:00 a .m . to 5:00 p .m . CST, at (800) 334-6011. Use the guide on the following page to help find and correct system faults. Contact Technical Support before replacing the control or for additional troubleshooting .
ERROR CODES
When the control detects an internal error, it will stop controlling, deactivate the humidifier, and the LCD will display the Error Code . See figure 10 . The control will attempt to recover from the error every 10 minutes . The Error Code will continue to be displayed as long as the error condition exists. Button presses are not registered when in Error Mode . Cycling power to the control will not clear the code and the control will need to be replaced .

TABIE 1 – Troubleshooting Guide

Symptom	Possible Reason	Troubleshooting Procedure
No power to the control.	Incorrect wiring.	Verify wiring connections between

control, humidifier and HVAC system (where applicable►.
No power to humidifier.| •Verify that the humidifier is wired correctly.
•Verify the circuit breaker has not tripped.
No power to HVAC equipment.| •Verify HVAC system switch is on.
•Verify the circuit breaker has not tripped.
Control does not turn on humidifier.| Incorrect wiring.| Verify wiring connections between control and humidifier.
Display does
not flash all LCD segments during Test Mode.| LCD error.| Replace control.
Display shows EE.| Control detected an internal error.| Replace control.
Inaccurate humidity reading.| Control recently installed after being stored in an uncontrolled temperature and humidity environment.| Allow 48 hours for control to acclimate.
Offset has been applied to the humidity reading.| Change the offset.
Control is mounted in direct sunlight, above a heat or humidity source, or in the path of a supply register.| Relocate the control.

P.O. Box 1467 • Madison, WI 53701-1467
Phone: 800/334-6011 • Fax: 608/257-4357
www.aprilairepartners.com
Printed in U .S .A .
© 2011 Aprilaire – A division of Research Products Corporation
61000790 7 .11
B2205457A

Documents / Resources

| Aprilaire 65 Digital Manual Humidifier Control [pdf] Installation Guide
65 Digital Manual Humidifier Control, 65, Digital Manual Humidifier Control, Manual Humidifier Control, Humidifier Control
---|---