POWERED FLOW-THROUGH HUMIDIFIER
3
68-3074—01
Fig. 3. Humidifier location in relation to air conditioning coils.
Fig. 4. Humidifier components.
Fig. 5. Position securing clips.
7.
Position the humidifier housing in the hole (be sure it is
level), so the locking tabs are in place on the upper and
lower sheet metal edges of the hole.
8.
Push in the securing clips until completely seated.
9.
Drill holes and install the three sheet metal screws at the
top of the humidifier housing. Secure the housing with
the three remaining screws at the bottom of the housing.
10.
Reinstall the humidifier pad assembly in the humidifier
housing.
IMPORTANT
For proper operation, be sure the mark on the end of
the humidifier pad is facing up. Check that the water
feed tube is placed in the guide slots of the humidifier
housing.
11.
Hook the top of the cover to the housing and secure with
the thumbscrew located at the bottom of the cover.
WIRING HUMIDIFIER
WARNING
Serious Personal Injury or Equipment Hazard.
Moving parts can cause electrical shock and injury.
• Disconnect power supply before installation or
servicing.
• This device contains a moving fan blade; do not
operate the humidifier without the cover securely
attached.
All wiring must comply with applicable local codes, ordinances
and regulations.
For Convertible Humidity Control Wiring
Connections:
IMPORTANT
• Select models of fan centers include humidifier taps
so the current sensing relay or sail switch is not
needed.
• If not using a current sensing relay or sail switch, the
120V humidifier plug must be energized during
blower motor cycles for proper operation.
1.
Wire the current sensing relay or sail switch.
2.
Connect only the two yellow wires to the humidity control
(red wire connections are not used for mechanical
humidity control). See the typical wiring diagrams in Fig.
6 through 8.
For additional mounting and wiring information, refer to the
humidity control installation instructions.
Fig. 6. Typical wiring diagram for humidifier using fan
control to cycle blower motor fan and humidifier
simultaneously.
Fig. 7. Typical wiring diagram of current sensing relay with
humidifier.
M12812
M28929
COVER
ASSEMBLY
HUMIDIFIER
PAD ASSEMBLY
FEED TUBE NOZZLE
WATER
DISTRIBUTION TRAY
HUMIDIFIER
HOUSING
THUMB
SCREW
M12813
CLIP
CLIP
HUMIDIFIER
MECHANICAL
HUMIDISTAT
120 VAC
TO BLOWER
MOTOR
IGNITION BOX
M12686
YELLOW WIRES
1
1
2
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
24V WIRING.
CURRENT
SENSING
RELAY
HUMIDIFIER
120 VAC
BLOWER
MOTOR
C
LO
HI
M12684
YELLOW WIRES
1
1
2
2
POWER SUPPLY.
PROVIDE DISCONNECT
MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
24V WIRING.
MECHANICAL
HUMIDISTAT
