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Aprilaire 720 Series Manual
Aprilaire 720 Series Manual

Aprilaire 720 Series Manual

Fan-powered evaporative humidifier

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1
DETERMINE LOCATION AND CONFIGURATION
DEFAULT CONFIGURATION
16.5"
6.5'
16.5"
10.5"
1.5" (Valve)
Cold Water Inlet
Reconfigure if nearby obstructions interfere with cover removal/service or if
air flows from left to right (horizontal applications).
SUPPLY (RECOMMENDED)
DEFAULT
CONFIGURATION
A C
H V
A C
H V
RECONFIGURED
Use both sides of
template to determine
best mounting location
A C
and configuration
A C
H V
H V
AIRFLOW
L TO R
This humidifier can be installed on either the supply or return
plenum. Supply is recommended for peak performance.
Capacity rating is significantly reduced on the return plenum.
Humidifier dimensions and accessibility must be considered
when selecting location.
Note: Do not install on systems with static pressure greater than 0.8" w.c.
WARNING / AVERTISSEMENT
ATTENTION INSTALLER:
Improper installation or maintenance may cause
property damage or injury. Disconnect electrical power and water before
starting installation or service.
ELECTRIC SHOCK HAZARD:
120 volts may cause serious injury from
electric shock.
RISK OF SCALDING:
Water temperature over 125°F can cause severe
burns and scald instantly.
ATTENTION INSTALLATEUR:
Une installation ou un entretien inadéquat(e)
peut entraîner des dommages matériels ou corporels. Débranchez
l'alimentation électrique et coupez l'eau avant deprocéder à l'intervention
RISQUE DE CHOC ÉLECTRIQUE:
Une tension de 120 volts peut provoquer
des blessures graves par électrocution.
RISQUE DE BRULURES:
Une température d'eau supérieure à 52°C (125°F)
peut provoquer de graves brûlures et ébouillanter instantanément.
CAUTION / MISE EN GARDE
SUDDEN OPERATION MAY CAUSE PERSONAL INJURY OR
PROPERTY DAMAGE
Turn the humidifier control to OFF or lowest setting
before servicing.
SHARP EDGES MAY CAUSE INJURY FROM CUTS.
Gloves and safety
glasses recommended.
UNE MISE EN MARCHE SOUDAINE PEUT ENTRAÎNER DES BLESSURES
OU DES DOMMAGES MATÉRIELS.
Mettez la commande de l'humidificateur
sur OFF ou sur le réglage le plus bas avant toute intervention.
LES BORDS ACERES PEUVENT CAUSER DES COUPURES GRAVES.
Portez toujours des lunettes ou des lunettes de sécurité et des gants durant
l'installation de l'unité.
2
VERIFY CONTENTS AND PREPARE
UNIT FOR INSTALLATION
2" MIN
FOR
SERVICE
TOOLS NEEDED
What's in the box?
• Model 720 Humidifier
1/4" O.D.
• Humidifier Control
Copper
Tubing
• Model L HydroCore™
• Installation Template
Low Voltage
Wire
• 24 VAC 10 VA
Transformer
Drain
Tubing
• Saddle Valve
& Clamp
• Installation Kit (720AKZ,
720MKZ only)
1/2" I.D.
WALL OR
OBSTRUCTION
AIRFLOW
R TO L
a.
b.
Slide latch to release
cover and rotate away
from fan.
Note: Need to reconfigure the fan module for your application?
Flip this template over to continue.
4
MOUNT, SECURE,
AND SEAL UNIT
a.
Angle top of base toward the
duct opening and engage hooks.
b.
Hinge the humidifier toward
the opening and slide down to
engage bottom hooks.
6
CONNECT WATER SUPPLY AND DRAIN LIN
a.
Install a 1/4" O.D. copper water supply line. Purge water line
before connecting to valve inlet using included 1-piece
compression fitting. See below for details.
b.
Install 1/2" I.D. drain hose and secure with a hose clamp.
Route to a floor drain or condensate pump. Ensure
constant downward slope.
WATER CONDITIONS
• Ensure connections are water tight and adhere to local codes.
• Pressure: 30–120 psi
• Best Practice: Connect to soft water. Humidifier is effective with hot or cold. Installations on hard water
will require more frequent maintenance. A scale-reducing inline water filter is recommended to lessen
the effects of hard water.
• Hot water recommended for return mounted installations.
Annual maintenance of your
humidifier will prevent buildup
of minerals left behind during
evaporation. Scan the QR code
at the top of this template to
learn more.
#8 × 3/4" min.
Flanged Hex Head Screw
SCAN TO
LEARN
MORE
Fan-Powered Evaporative Humidifier
3
DETERMINE LOCATION ON DUCT,
THEN LEVEL, MARK, AND CUT
c.
Remove
Tilt HydroCore
forward. Remove
cover and set
then set aside.
aside.
5
Important: Don't forget the
two screw holes on the side
of the fan module.
Flip
template
over for
fan speed
options
a.
Ensure rubber seal cap is
c.
Secure unit with eight (8)
in place on valve orifice.
#8-3/4" flanged hex head
Align HydroCore to valve,
screws.
then tilt and snap.
d.
Seal the edges with caulk
to prevent air leaks.
7
E
DRAIN LINE
Clear, flexible drain tube is
recommended. If using hard
1/2" I.D. hose
pipe, 6" minimum of flexible
tube is required between the
humidifier and pipe for drain
cleaning access.
SERIES 720
Important: Consider where water,
drain, and electrical connections
are when locating the unit.
Softened water is recommended
to reduce annual maintenance
requirements.
Level
Template
Plenum opening:
14 1/4"W x 14 1/4"H
Do not position humidifier in
front of blanked off end
CAUTION /
MISE EN GARDE
Do not cut into refrigerant line.
Ne pas couper le tuyau du
réfrigérant.
INSERT HYDROCORE
AND REPLACE COVER
b.
Align cover to outside edge of
base and push or pivot into
place. Ensure cover is fully
latched to avoid air leaks.
CONNECT ELECTRICAL WIRING
a.
The solenoid valve requires a 24 VAC transformer with at least
10VA to operate. Flip template over for wiring details.
b.
Plug supplied power cord into 120 VAC outlet. Do not alter or
hardwire the power cord.
NOTICE:
Install a condensate pan with float switch or other active
leak prevention device when installing in or over a finished space.
Push-to-connect adapter
included with some models
for use with code approved
plastic supply line
WATER SUPPLY IN
1/4" O.D. copper
Finger-tight plus 1/8 to 1/4 turn
1/2"

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Do you have a question about the 720 Series and is the answer not in the manual?

Questions and answers

James L Balogh
March 4, 2025

my AprilAire was installed on the return duct just before an air filter is this OK

1 comments:
Mr. Anderson
March 4, 2025

No, installing the Aprilaire 720 Series on the return duct just before an air filter is not recommended. The manual states that while the humidifier can be installed on either the supply or return plenum, the supply plenum is recommended for peak performance. Additionally, capacity is significantly reduced when installed on the return plenum.

This answer is automatically generated

Brad Wilson
March 26, 2025

requesting service manual for 720m series humidifier, parts listing and item

Summary of Contents for Aprilaire 720 Series

  • Page 1 #8 × 3/4” min. Flanged Hex Head Screw SCAN TO LEARN MORE SERIES 720 Fan-Powered Evaporative Humidifier DETERMINE LOCATION ON DUCT, DETERMINE LOCATION AND CONFIGURATION VERIFY CONTENTS AND PREPARE THEN LEVEL, MARK, AND CUT UNIT FOR INSTALLATION 2" MIN DEFAULT CONFIGURATION SERVICE TOOLS NEEDED What’s in the box?
  • Page 2 HUM OR © 2024 AprilAire | aprilaire.com | 800.334.6011 SOLENOID instructions for model-specific wiring AprilAire reserves the right to change specifications without notice. and setup directions. DRY CONTACT REMINDER: Plug power cord (located on fan module) into 120 VAC outlet.

This manual is also suitable for:

Ap720aAp600mAp720m720
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