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STEP 7: Alternate Location for Outdoor
Temperature Sensor
The Sensor can also be mounted in the center of either:
• PVC fresh air intake pipe for the HVAC system
OR
• fresh air intake duct. Mount the sensor with a #8 galvanized
screw.
In both cases, the Sensor must be no more than 3 feet
from the outside wall. See Figure G.
If it is not feasible to use the Outdoor Temperature Sensor in any
of the ways described, the Humidifier Control can be installed for
Manual Operation. See “Installing the Humidifier Control for
Manual Operation” and Figure J for details.
Figure G
3 FEET MAX.
CENTER LINE
OUTSIDE WALL
90-999
STEP 5: Determine Location for Outdoor
Temperature Sensor
The location of the Outdoor Temperature Sensor must meet
these three requirements:
1. Must be mounted on North, East or West side of house out of
direct sunlight.
2. Must be at least 3 feet from all exhaust vents.
3. Must be above expected snow line (see Figure F).
Incorrect humidity levels will result if these requirements are not
met.
Figure F
NORTH,EAST
ORWESTSIDE
OFHOME
OUTDOOR
TEMPERATURE
SENSOR
SENSOR
BRACKET
SENSOR
ABOVEEXPECTED
SNOWLINE
OUTDOOR
TEMPERATURESENSOR
LEADS
90-998
STEP 6: Locate Existing Access Hole to Outside
A convenient way to get the Sensor wire outside is to make use
of unused wires running to the A/C condensing unit (if
applicable). Other ways are to use existing holes for Cable TV
lines, telephone lines, A/C lines, etc. Read all equipment
instructions beforehand for possible conflicts and warnings.
WARNING
If Outdoor Temperature Sensor ismounted inan intake
ductor pipe,do notset Blower Activation switch to “ON”.