Aprilaire 500 Series Installation Template

Humidifier
WARNING
• ATTENTION INSTALLER: Read this manual before installing.
Improper installation or maintenance may cause property
damage or injury. It is recommended that installation,
service, and maintenance be performed by a trained
service technician. This product must be installed in
compliance with all local, state, and federal codes.
• ELECTRIC SHOCK HAZARD: 120 volts may cause serious
injury from electric shock. Disconnect electrical power to
the HVAC system and humidifier before starting installation
or servicing. Leave power disconnected until installation/
service is completed.
• RISK OF SCALDING. Water temperature over 125°F can
cause severe burns and scald instantly. Shut off the hot
water supply before disconnecting or tapping into any hot
water supply line.
• Avoid obstructions such as plumbing or electrical wires
when cutting into walls.
CAUTION
• SHARP EDGES MAY CAUSE INJURY FROM CUTS. Use care when
cutting plenum openings and handling ductwork. Always
wear glasses/goggles and gloves when installing the unit.
• Dropping may cause personal injury or equipment damage.
Handle with care and follow installation instructions.
NOTICE
FREEZING TEMPERATURES CAN BURST WATER PIPES.
• Do not install the humidifier where freezing may occur. The
water line could freeze and crack causing water damage
to the home.
CONDENSATION DAMAGE OR MOLD CAN OCCUR.
• Position the return duct mounted humidifier control at least
6" upstream of the humidifier, bypass duct connection, or
fresh air intake for accurate humidity sensing.
• Position the wall-mounted humidifier control in areas
unaffected by drafts or heat sources for accurate humidity
sensing.
• Lower the humidity setting on the humidifier control if there
is excess condensation on the inside of any windows in
unheated living spaces.
EQUIPMENT DAMAGE MAY OCCUR IF INSTALLATION
INSTRUCTIONS ARE NOT FOLLOWED.
• Do not install the humidifier or bypass connection on the
furnace jacket.
• Do not connect the transformer to the blower motor wiring.
• Do not install the humidifier or bypass connection on a
plenum face at the blanked end of the cooling coil.
• If water pressure exceeds 125 psi, reduce water pressure
with devices allowed by local codes.
• Use hot water with a temperature no greater than 140°F
(60°C).
• Do not install the humidifier on systems with differential
pressure greater than 0.4" w.c. between the supply and
return plenums.
• When installing the humidifier control on the return duct of
a downflow furnace, ensure blower continues to run after a
heat call is satisfied to eliminate high temperatures from
damaging the humidifier control.
• Periodically check drain line to make sure water flows
freely to drain.
SPECIFICATIONS
Humidifier Dimensions:
Width (including solenoid valve): 15-5/8"
Height (including drain spud): 13"
Depth: 10-1/4"
Bypass Duct Opening: 6" diameter
Plenum Opening: 9-1/2"W x 9-1/2"H
Water Feed Rate: 3 gph
Electrical Data: 24 VAC, 60 Hz, 0.5 Amp
Water Panel®: Model 10
INSTALLATION OPTIONS (LEFT HAND DISCHARGE SHOWN)
AprilAire Model 500 and 500M can be
installed on either the supply plenum or cold
air return of a forced air handling system
with right hand or left hand bypass duct
connections. The humidifier dimensions and
serviceability must be considered when
selecting the best location for the humidifier.
Hot water is recommended (140°F max) for
maximum evaporative capacity. It is also
required when the Blower Activation Feature
is used with an Automatic Digital Humidifier
Control or when mounted on a heat pump
system. The humidifier functions with cold,
hot, softened, or unsoftened water.
1. Front Cover
2. Base
3. Feed Tube
4. Water Distribution Tray
5.
Water Panel
2
6.
Scale Control Insert
7.
Bypass Damper
8. Damper Handle
9. Drain Spud
10. Hole Plug
11. Nameplate
12. Solenoid Valve
7
90-1250 8
TEMPLATE MUST BE LEVEL
FURNISHED ITEMS
RETURN
• Humidifier with built-in bypass damper
• 24 VAC transformer
• Automatic Digital Humidifier Control and
Outdoor Temperature Sensor (Model 500 only)
• Manual Humidifier Control (Model 500M only)
• Humidifier Control Installation Instructions
• Saddle valve
SUPPLY
• Humidifier Installation Template
UPFLOW
SUPPLY
RETURN
DRAIN LINE
FLOOR DRAIN OR
CONDENSATE
PUMP
PARTS LIST
SUPPLY
12
RETURN
10
FLOOR DRAIN OR
CONDENSATE
DRAIN LINE
PUMP
9
6
RETURN
INSTALLATION TEMPLATE
500 Series
SUPPLY
Small Bypass
Evaporative Humidifier
ITEMS NOT FURNISHED
SUPPLY
• Mounting screws (sheet metal
screws)
• Water supply line (1/4" O.D. copper)
• Drain line (1/2" I.D. hose)
RETURN • Low voltage wire (18-22 gauge)
DRAIN LINE
• Bypass ductwork
• Model 50 current sensing relay
FLOOR DRAIN OR
CONDENSATE
(if required)
PUMP
SUPPLY
HORIZONTAL
FLOOR DRAIN OR
CONDENSATE
DRAIN LINE
PUMP
4
5
3
1
Product Info &
Digital Manual
11
RETURN
90-1079