Installation Manual

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.