Kenmore CENTRAL HUMIDIFIER 303.9380612 - Manual (Page 9)

The alternate wiring methods are for your humidifier
to operate only when the furnace blower is on and
the humidistat is calling for humidity. The method you
select will depend on your furnace control system.
Find the type of system you have and follow that
method. Also, if the method selected requires a sail
switch or relay, this item must be purchased separately.
Alternate Method - 1
For ANY Forced Air Furnace
Humidifier runs only when furnace blower is running
and the humidistat calls for additional humidity. The
humidifier must be turned off manually during cooling
season (Fig.15).
ALTERNATE WIRING METHODS
Sail
120
Volt
Humidistat
Fig. 15
Install Sail Switch In Return Air Plenum (use normally
open contacts). Purchase this accessory separately
if needed. Available from Sears Product Services:
Phone: 1-800-366-7278 Specify Division 42 PLS 042
Part No. 9114
Alternate Method - 2
Any furnace with single speed, 120 ¥AC Blower
Humidifier runs only when furnace blower is running
and the humidistat calls for additional humidity, it’s not
necessary to turn humidifier OFF during the summer
(Fig. 16).
White
NEUTRAL
(White)
FAN MOTOR
Any furnace/air conditioning system with
multi-speed furnace blower
Humidifier runs only when furnace blower is running
and the humidistat calls for additional humidity.
Humidifier is automatically “off” during cooling season.
With the thermostat in the “FAN ON” position, the
humidifier will not operate (Fig. 17).
Alternate Method - 3
To “C” on
Transformer
Relay Panel
To “G” on
Transformer
Relay Panel
SPOT Relay
{Sears Stock
No. 42-9248)
Black T- ,
—► To Low
Heating
Speed
Motor Lead
TO
HUMIDIFIER
<3
Tape
Red
Wire
Humidistat
NEUTRAL 120 VOLT
White
o
Fig. 17
Alternate Method - 4
Sears “15” and “20” furnace with electrical
comfort center
Humidifier runs only when the furnace blower is run­
ning and the humidistat call for additional humidity.
The humidifier must be turned off manually during
the cooling season (Fig. 18).
Fig. 16
Fig. 18
NOTE: The humidifier and humidistat have a green
ground wire which must be connected to ground
(refer to Page 8, Step 8 of Humidistat).