Aprilaire 62 Setup guide

Automatic
Digital Humidifier Control
Model 60 & 62
Safety and Installation Instructions
READ COMPLETE INSTALLATION INSTRUCTIONS
AND TEMPLATE BEFORE STARTING INSTALLATION.
Model 60 shown.
WARNING
ATTENTION INSTALLER: 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.

32
Getting Started....................................page 3
Installation .......................................page 7
System Checkout .................................page 19
Troubleshooting Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 21
TABLE OF CONTENTS
THESE INSTALLATION INSTRUCTIONS
ARE FOR THE APRILAIRE®AUTOMATIC DIGITAL
HUMIDIFIER CONTROL ONLY!
For Aprilaire®humidifier installation,
follow Aprilaire Humidifier Installation Instructions.
WARNING
High voltage can cause serious injury.
Disconnect electrical power to the furnace and humidifier
before starting installation.
Sharp edges.
Wear gloves and use care when cutting plenum openings
and handling ductwork.
CAUTION
Condensation damage may occur.
Do not set humidifier control higher than recommended.
Lower the humidity setting if there is excess condensation
on the inside of any windows in unheated living spaces.
Install according to the enclosed installation instructions.
Controller damage or malfunction may occur
if installation instructions are not followed.
Install humidifier control on return plenum only.
Install humidifier control upstream of the bypass outlet or
steam dispersion tube.
Do not install humidifier control facing downward.
GETTING STARTED
STEP 1: Unpack the Humidifier Control Carton
Make sure all components are present (see Figure A):
A. Humidifier control
B. Outdoor temperature sensor
C. Manual mode label
B
AC
Figure A 90-1201B

54
STEP 2: Disassemble the Humidifier Control
Remove the knob. Remove the cover by pulling at the bottom and
swinging it out and upward. See Figure Bto become familiar
with the terminal positions. Figures Kand Lshow complete
installation wiring diagrams for Aprilaire humidifiers.
Figure B – Digital Humidifier Control 24V Terminals
90-1397B
HHGfWGODTBACR
OUTDOOR
TEMPERATURE
SENSOR
24 VAC FROM
HVAC EQUIPMENT
“R” AND “C”
COMMUNICATION
WITH APRILAIRE
8570 THERMOSTAT
HEAT SIGNAL
FROM HVAC
EQUIPMENT
FAN SIGNAL
FROM
THERMOSTAT
SOLENOID
CONTROL
OUTPUT
FAN SIGNAL
TO HVAC
EQUIPMENT
Reversing the Rand Cterminals on humidifier control
will cause improper operation.
Water Panel
Indicator
Settings
STEP 3: Set the Change Water Panel Indicator
This setting will control when the indicator light turns on,
reminding you to change your water panel. If your control came
with a humidifier, the control is pre-set for the humidifier. If the
installation site has a 3-month or shorter heating season or very
hard water, you may want to adjust the setting (see Figure C).
Set to “OFF” for Model
800 Series humidifiers or
to turn the Humidifier Pad
Change indicator to off.
Set to “A” for Model
400 Series humidifiers
in areas with very hard
water. The indicator
will light after 150
hours of operation.
Set to “B” for Model 400
Series humidifiers; and
Model 500 Series, 600
Series and 700 Series
humidifiers in areas with
very hard water. The
indicator will light after
300 hours of operation.
Set to “C” for Model 500 Series, 600 Series
and 700 Series humidifiers. The indicator will
light after 600 hours of operation.
Figure C
90-1202B

76
STEP 4: Blower Activation Feature Explanation
The Blower Activation switch is set to the “ON” position to allow
the humidifier control to activate the HVAC fan for maximum
humidification. For this setting, the Models 500, 600 and 700
must be connected to hot water.
If the HVAC system has been idle for 1 hour, the humidifier
control will activate the HVAC system fan to sample the air for
3 minutes. If the RH is lower than the set point, the humidifier
control will activate the humidifier and keep the fan running.
The humidifier will continue to operate for 2 hours or until the
humidification set point is reached.
If the RH set point has not been reached by the end of a call for
heat, the control will continue to operate the humidifier and the
HVAC fan until the humidification set point is reached or 2 hours
have elapsed.
When the Blower Activation switch is in the “OFF“ position, the
humidifier control will only operate the humidifier if humidity
is required and the HVAC system fan is operating or the HVAC
system is producing heat.
NOTE: If used in conjunction with an Aprilaire 8570
Communicating Thermostat, and the Blower Activation feature is
desired, DO NOT wire the A B communication terminals.
The Model 62 shipped with the Model 800 steam humidifier is
factory set to “OFF.” The Model 62 does not have the “Change
Water Panel” light on the control. The canister change indicator
for the Model 800 is on the humidifier. STEP 1: Mount the Humidifier Control
Humidifier control must be mounted on the return duct, at least 6
inches upstream of the following (see Figure D):
• Humidifier
• Humidifier bypass ductwork (if applicable)
• Fresh air intake ductwork (if applicable)
For accurate humidity control, mount the humidifier control at least
12 inches upstream of the steam humidifier dispersion tube.
Ambient operating temperature of the humidifier control is to be
from 20°F to 120°F to prevent damage to the control display.
90-1137
6" MIN.
RETURN
DUCT
HUMIDIFIER
CONTROL
FRESH AIR
INTAKE
COIL
HUMIDIFIER
BYPASS
CONNECTION
INSTALLATION
Figure D

98
DUCT (SHEET METAL) MOUNT:
After location for control is selected, drill a 3/4 inch hole for the
RH sensor (the RH sensor extends from the back of the humidifier
control).
Use 2 sheet metal screws, 3/4 inch long (not provided), to mount
the humidifier control. Use the mounting slot to level the control,
then secure the control with the second sheet metal screw.
Make sure the humidifier control sensor gasket is seated tightly
around the drilled hole. Do not install control without the gasket.
CAUTION
Controller damage or malfunction may occur if installation
instructions are not followed.
Install humidifier control on return plenum only.
Install humidifier control upstream of the bypass outlet or
steam dispersion tube.
Do not install humidifier control facing downward.
DUCT (FIBER BOARD) MOUNT:
After location for control is selected, cut a rectangular hole in the
duct board, no smaller than 6-9/16 inches long by 4-3/8 inches
wide.
Cut a rectangular piece of sheet metal to fit behind the hole in
duct board for mounting the humidifier control.
Drill a 3/4 inch hole for the RH sensor (the RH sensor extends from
the back of the humidifier control) into the sheet metal plate.
Use 2 sheet metal screws, 3/4 inch long (not provided), to mount
the humidifier control.
Make sure the humidifier control sensor gasket is seated tightly
around the drilled hole. Do not install control without the
gasket.
Secure the sheet metal plate, with the humidifier control mounted,
inside the duct (see Figure E).
CONTROL REPLACEMENT:
When replacing an existing control, the duct opening left by the
removed control must be covered completely. Locate and install
the new control as instructed previously in this step.

1110
90-1203B
CONTROL BOARD
COVER
KNOB
BASE PLATE
RETURN DUCT
RETURN
DUCT
SHEET METAL
PLATE
CUT OPENING IN
RETURN DUCT
SHEET METAL PLATE
GASKET
SCREW (x2)
INSIDE OF
RETURN
DUCT
STEP 2: Determine Location for and Mount Outdoor
Temperature Sensor
The location of the outdoor temperature sensor must meet these
3 requirements:
1. Must be mounted on north, east or west side of house out of
direct sunlight.
2. Must be at least 3 feet from all exhaust vents.
3. Must be above expected snow line (see Figure F).
Incorrect humidity levels will result if these requirements are not
met.
Secure sensor bracket with a #8 galvanized screw.
Figure F NORTH, EAST OR
WEST SIDE OF
HOME
OUTDOOR
TEMPERATURE
SENSOR
SENSOR
BRACKET
SENSOR
ABOVE EXPECTED
SNOW LINE
OUTDOOR
TEMPERATURE SENSOR
LEADS
90-998
NOTE: A convenient way to get the sensor wire outside is to
make use of unused wires running to the A/C condensing unit
(if applicable). Other ways are to use existing holes for cable
TV lines, telephone lines, A/C lines, etc. Read all equipment
instructions beforehand for possible conflicts and warnings.
Figure E – Fiber Board Duct Mount

1312
STEP 3: Alternate Location for Outdoor
Temperature Sensor
When mounting the outdoor temperature sensor (ODT) in an
intake air duct, turn the Blower Activation switch to “OFF” (see
Figure J). If left in the “ON” position, over-humidification and
condensation damage could occur.
The sensor can be mounted with a #8 galvanized screw in the
center of either:
• PVC fresh air intake pipe for the HVAC system
• A fresh air intake duct
In both cases, the sensor must be no more than 3 feet from
the outside wall. See Figure G.
If it is not feasible to use the outdoor temperature sensor in any
of the ways described, the humidifier control can be installed
for manual operation. See “Installing the Humidifier Control for
Manual Operation” and Figure J for details.
3 FEET MAX.
CENTER LINE
OUTSIDE WALL
90-999
STEP 4: Route the Wire from Control to Sensor
Run wire to the ODT. Sensor is accurate with lead lengths up to
300 ft.
STEP 5: Attach Sensor Wire to Humidifier Control
Strip wire 1/4 inch, and insert the wires from the sensor into the
terminals labeled “ODT” on the humidifier control. See Figure H
for location of terminals.
Figure H
90-1219B
CAUTION
Do not run ODT alongside wires carrying high voltage (120
VAC or higher).
Figure G

1514
Installing the Humidifier Control for
Manual Operation
If it is not feasible to install the ODT, the humidifier
control can be operated in Manual Mode.
1. Position the mode switch in the “MAN” position.
Manual indicator “M” will be displayed.
2. Apply the “Manual Mode” label to the cover, aligning
the sticker and knob holes.
BLOWER ACTIVATION SWITCH
AUTO/MANUAL MODE SWITCH
Figure J
90-1236B
STEP 6: Model 60 Wiring for Model 400, 500, 600, and
700* Series (Gray Housing) Humidifiers – See Figure K
Strip the wires used for all humidifier control terminal connections
1/4 inch.
NOTES:
• The Model 60 must be continuously powered from “R” and “C”
on the furnace to function properly.
• The minimum volt-ampere required is 2.0 VA.
• In order for the humidifier to operate, the HVAC blower must be
running and the Model 60 must be calling for humidity.
WIRING DESCRIPTION:
• Wire external 24 VAC transformer into a constant power
source other than the heating, ventilation and air conditioning
equipment (HVAC) blower circuit. The transformer can be
powered off the 120 VAC line at the junction box before it enters
the HVAC equipment. Connect the 24 volt side of the transformer
to one of the “H” terminals on the humidifier control and to
one of the humidifier solenoid valve wires. Connect the other
solenoid valve wire to the other “H” terminal.
• Wire “R” and “C” on the Model 60 to “R” and “C” on the
furnace terminal strip.
• Remove the thermostat “G” wire from the furnace terminal strip
and wire it to “G” on the Model 60 control.
• Wire “Gf” on the Model 60 to “G” on the furnace terminal strip.
WARNING
120 volts can cause serious injury from electrical shock.
Disconnect electrical power to the furnace before starting
installation.
NOTE: If control setting was changed between Automatic and
Manual mode, power to the control must be cycled by removing
then reinstalling the R wire.

G
Y
W
C
R
120 VAC
R
C
W
Y
G
FURNACE
THERMOSTAT
OR ZONE PANEL
EQUIPMENT
TERMINALS
OUTDOOR
TEMPERATURE
SENSOR FOR
AUTOMATIC
MODE
NORTH, EAST
OR WEST SIDE
OF HOME
ABOVE EXPECTED
SNOW LINE
CONTINUOUSLY POWERED
24 VAC TRANSFORMER
PROVIDED WITH HUMIDIFIER
CONNECT
TO HOT WATER
SUPPLY
CONNECT
DRAIN LINE
HERE
OUTPUTSINPUTSPOWER
GW
CRHHODTGfA
ADHC TERMINAL STRIP
B
1716
Figure K – Model 60 Wiring for Model 400, 500, 600
and 700* Series (Gray Housing) Humidifiers
90-1510
• Wire “W” on the Model 60 to “W” on the furnace terminal strip.
• Replace cover and knob.
*See note on page 18.
STEP 7: Model 62 wiring for Model 800 Series Steam
Humidifier and Model 60 Wiring for Model 700* Series
(Almond Housing) Humidifiers – See Figure L
Strip the wires used for all humidifier control terminal
connections 1/4 inch.
NOTES:
• The Model 62 must be continuously powered from “R” and “C”
on the furnace to function properly.
• The minimum VA required is 2.0 VA.
• In order for the humidifier to operate, the HVAC blower must
be running and the Model 62 must be calling for humidity.
WIRING DESCRIPTION:
• Wire “H” terminals on the Model 62 to the “Humidifier”
terminals on the Model 800 control board.
• Wire “R” and “C” on the Model 62 to “R” and “C” on the
furnace terminal strip.
• Remove the thermostat “G” wire from the furnace terminal
strip and wire it to “G” on the Model 62 control.
• Wire “Gf” on the Model 62 to “G” on the furnace terminal
strip.
• Wire “W” on the Model 62 to “W” on the furnace terminal
strip.
• Replace cover and knob.
WARNING
120/240 volts may cause serious injury from electrical
shock. Disconnect electrical power to the furnace and
humidifier before starting installation.
CAUTION
Model 700 series humidifiers with almond housings (produced
prior to October 2007) wired per Figure K will experience
circuit board damage rendering the unit inoperable. See
Figure L for proper wiring diagram.

1918
OUTPUTSINPUTSPOWER
GW
CRHHODTGfA
ADHC TERMINAL STRIP
B
MODEL 800
STEAM HUMIDIFIER
OUTDOOR TEMPERATURE SENSOR
FOR AUTOMATIC MODE
FURNACE
THERMOSTAT
OR ZONE PANEL
EQUIPMENT
TERMINALS
R
C
W
Y
GG
Y
W
C
R
Figure L – Model 62 wiring for Model 800 Series Steam
Humidifier and Model 60 Wiring for Model 700* Series
(Almond Housing) Humidifiers
90-1511
*Model 700 Series humidifiers produced prior to October
2007 have an almond color housing and internal transformer
providing 24VAC to the solenoid valve. Models produced after
October 2007 have a gray housing and external transformer
provided with the unit. For zoned HVAC systems, refer to the
THERMOSTAT IN A ZONED HVAC SYSTEM section found
in the Series 800 Steam Humidifier Installation and
Maintenance Instructions for instructions pertaining to
ductwork and wiring.
1. Replace the cover by snapping it into the humidifier control
base. Also replace the knob onto the control.
2. Turn Blower Activation switch to “OFF.”
3. Restore power to the HVAC system.
4. Activate the HVAC system or heat pump (fan or heat).
5. Once the blower is operating, rotate the knob of the
humidifier control clockwise to the “Test/Reset” position.
When the knob is set in the “Test/Reset” position, the green
“Humidifier On” light will illuminate. After 5 seconds, the
green “Humidifier On” light will blink, indicating a system
reset.
6. If the humidifier control and humidifier are set up properly,
you should hear the solenoid valve click into the open
position. On the Model 800 steam humidifier, the “Steam”
light will illuminate green. In the “Test/Reset” position, the
humidifier will operate for 1 minute. If the humidifier control
is left in the “Test/Reset” position for more than 1 minute,
the “H” terminals will open (closing the solenoid valve). The
knob and display backlights will flash, and the digital display
will show the software revision level (e.g.,“r1”) indicating that
the humidifier control is still in the “Test/Reset” position.
7. If the humidifier does not activate with the humidifier control
in the “Test/Reset” position, refer to the troubleshooting
guide.
Blower Activation Test
• Deactivate HVAC system or heat pump.
• Turn knob to “OFF.”
• Set switch to Blower Activation “ON.”
SYSTEM CHECKOUT

2120
• Turn the knob to “Test/Reset.” The “Humidifier On” light
will illuminate. After 5 seconds, the green “Humidifier On”
light will blink, indicating a system reset.
• If the humidifier control and humidifier are set up properly,
the solenoid valve should click and the HVAC blower should
activate.
• If the humidifier does not activate with the humidifier
control in the “Test/Reset” position, refer to the
troubleshooting guide.
• If HVAC blower does not activate with the humidifier
control in the “Test/Reset” position, refer to the
troubleshooting guide.
8. Setting the humidifier control:
• If the home is vacant, set the humidifier control to “OFF.”
• If in Manual Mode and the system is installed during
cooling season, set the humidifier control to “OFF.”
• If the home is occupied, set the humidifier control to
“Normal.” For Manual Mode, set to 35%.
• The Blower Activation feature will not activate immediately
even if there is low humidity. The humidifier control will
wait for the next HVAC call or 1 hour, whichever comes
first, before starting the humidifier. To start the humidifier
before these conditions are satisfied, set the humidifier
control to test mode. When the humidifier starts, set the
humidifier control to “Normal.”
9. Instruct the homeowner to refer to the Aprilaire Owner’s
Manual for the initial adjustment period.
10. Make sure the red “Call Dealer for Service” light is not
flashing. If the red “Call Dealer for Service” light is flashing,
refer to the troubleshooting guide.
TROUBLESHOOTING GUIDE
SYMPTOM
“Call Dealer For Service” light flashing (see Figure M).
TROUBLESHOOTING PROCEDURE
Applies to both Automatic and Manual operation unless
indicated otherwise.
Display Error Code: E1: RH Sensor
Rotate humidifier control knob to the “Test/Reset” position.
After 5 seconds, the green “Humidifier On” light will blink,
resetting the error. If “E1” returns, replace the humidifier
control.
Display Error Code: E2: Control Knob
Rotate humidifier control knob to the “Test/Reset” position.
After 5 seconds, the green “Humidifier On” light will blink,
resetting the error. If “E2” returns, replace the humidifier
control.
Display Error Code: E3: Outdoor Temperature Sensor
Auto Mode (switch in “AUTO” position)
1. Make sure that the ODT sensor is properly connected to the
ODT terminals on the humidifier control.
2. Measure the resistance of the ODT sensor by removing the
leads from the humidifier control terminals and measuring
the resistance across the wires with an ohmmeter. Confirm
the reading with the temperature in Table 1 on page 23.
Reconnect the ODT sensor leads. If the resistance value
does not match the temperature value, replace the ODT
sensor.

2322
TROUBLESHOOTING PROCEDURE (CONTINUED)
3. Rotate humidifier control knob to the “Test/Reset” position.
After 5 seconds, the green “Humidifier On” light will blink,
resetting the error. If “E3” returns, replace the humidifier
control.
Manual Mode (switch in “MAN” position)
1. Make sure the ODT terminals are clear of any wires that
may short the terminals together other than the ODT sensor.
2. Rotate humidifier control knob to the “Test/Reset” position.
After 5 seconds, the green “Humidifier On” light will blink,
resetting the error. If “E3” returns, replace the humidifier
control.
Display Error Code: E4: Communication
This error applies to systems wired to an Aprilaire Model
8570 thermostat (see Figure Q) using the “A” and “B”
terminals. Rotate the humidifier control knob to the “Test/
Reset” position. After 5 seconds, the green “Humidifier On”
light will blink, resetting the error. If “E4” returns, check the
wiring between the digital humidifier control and Model 8570
check the connections at “A”and “B” on the humidifier control
and the Model 8570. Make sure the Model 8570 is wired and
operating properly according to the Model 8570 manual.
TABLE 1
Outdoor Temperature (°F) Resistance ( k) ±10
-30 231.8
-20 163.4
-10 117.3
0 84.8
10 62.2
20 46.1
30 34.4
40 26.1
50 19.9
60 15.3
70 11.9
80 9.3
90 7.3
100 5.8
Figure M
Red “Call Dealer For Service” Light
Yellow “Change Water Panel” Light
Green “Humidifier On” Light
90-1227

2524
SYMPTOM
Humidifier does not operate in “Test/Reset” mode.
TROUBLESHOOTING PROCEDURE
• Check wiring diagrams for correct humidifier control
installation.
1. For Model 700 Series humidifiers with gray color
housings, ensure that wiring diagram in Figure K is used.
2. For Model 700 Series humidifiers with almond color
housings, ensure that wiring diagram in Figure L is used.
• Make sure that the blower is operating and the HVAC
system is calling for heat.
• If connected to a Model 400 Series humidifier, make sure
both floats in the bottom of the scale control insert are in
the down position. If necessary, dump out water to lower
the floats.
• Check voltage at the humidifier control “R” and “C”
terminals. Voltage should be 22 VAC minimum to 30 VAC
maximum.
• Make sure that the saddle valve is open.
• In “Test/Reset” mode, the humidifier will operate for 1
minute only. DO NOT LEAVE THE HUMIDIFIER CONTROL
IN “TEST/RESET” MODE AS THE HUMIDIFIER WILL NOT
OPERATE.
SYMPTOM
Yellow “Change Water Panel” light is blinking (see Figure M).
TROUBLESHOOTING PROCEDURE
Check the condition of the water panel and replace it if
mineral deposits are blocking air flow. Follow the instructions
on the water panel box. Rotate the knob to the “Test/Reset”
position for at least 5 seconds to reset water panel change
timer. Check that the timer setting is correct for the humidifier
model and water conditions (see Figure C). DO NOT LEAVE
THE HUMIDIFIER CONTROL IN “TEST/RESET” MODE AS THE
HUMIDIFIER WILL NOT OPERATE.

2726
SYMPTOM
Humidifier operates only in “Test/Reset” mode.
• If outdoor temperature is greater than 60°F or less than
-30°F, the humidifier control will only operate in the
“Test/Reset” mode (for 1 minute).
• If the humidity level in the home is higher than the humidifier
control knob setting, the humidifier control will not operate
the humidifier.
TROUBLESHOOTING PROCEDURE
• Measure the resistance of the ODT sensor by removing the
leads from the humidifier control terminals and measuring
the resistance across the wires with an ohmmeter. Confirm
the reading with the temperature in Table 1. Reconnect the
ODT sensor leads. If the resistance value does not match the
temperature value, replace the ODT sensor.
• Make sure that the ODT sensor is mounted completely
outside the house on the north, east or west side of the
house and out of direct sunlight (Automatic Mode only).
• Make sure that the ODT sensor is located at least 3 feet
away from all exhaust vents (Automatic Mode only).
• If ODT sensor is mounted in the fresh air intake duct, make
sure that the sensor is no more than 3 feet from the outside
wall (Automatic Mode only).
• Make sure the “R” and “C” terminals are wired per enclosed
wiring diagrams.
• If control setting was changed from Automatic to Manual,
power to the control must be disconnected, then restored.
SYMPTOM
Humidifier operates constantly.
• If the humidity level in the home is less than the humidifier
control knob setting and there is a continuous fan call or heat
call (depending on setup), the humidifier control will operate
the humidifier until the humidity level is higher than the
humidifier control knob setting.
TROUBLESHOOTING PROCEDURE
• Set Blower Activation switch to “OFF.”
• In the “Test/Reset” mode, verify that the humidifier turns off
after 1 minute.
• Check the ODT sensor resistance and location, as instructed
on the previous page.
• Rotate the humidifier control knob counterclockwise to the
“OFF” position, and observe whether the humidifier turns off.
If the humidifier still operates in the “OFF” position, perform
the following:
1. Check the wiring diagram for correct humidifier control
installation.
2. Remove the wires from the “H” terminals on the
humidifier control. If the humidifier continues to operate,
replace the solenoid valve.
• Ensure humidifier control is installed per instructions in
STEP 1 of the INSTALLATION section.

P.O. Box 1467 • Madison, WI 53701-1467
Phone: [phone] • Fax: [phone]
www.aprilairepartners.com
10009879 8.16
B2205708F
Printed in U.S.A.
© 2016 Aprilaire – A division of
Research Products Corporation
SYMPTOM
Humidifier or humidifier control “chatters” or clicks ON and OFF
rapidly.
TROUBLESHOOTING PROCEDURE
• Check for steady 22 VAC to 30 VAC across the “R” and “C”
terminals of the humidifier control with a voltmeter.
• Check, with a voltmeter, that the HVAC signal across the
“W” and “C” and “G” and “C” terminals of the humidifier
control is a steady 22 VAC to 30 VAC.
• Make sure that the ODT sensor wiring is not running
alongside other wires carrying high voltage (120 VAC or
higher) (Automatic Mode only).
SYMPTOM
Humidifier blower does not activate during Blower Activation Test.
TROUBLESHOOTING PROCEDURE
• Set the Blower Activation switch to “ON.”
• Check wiring diagrams for correct humidifier control
installation.
28