Robertshaw 9025i Manuale Proprietario

The outdoor sensor (9025i) will sense the outdoor air
temperature and send this information to the thermo-
stat. On all models, the outdoor temperature will be
displayed below the room temperature. On the 9720i,
the outdoor temperature also can be used to control
the upstaging of the thermostat.

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1. Install the thermostat according to the instruction

manual supplied with it. Check that the thermostat
is operating. (Display shows the correct 
temperature.) CAUTION: Remove the thermostat
from the subbase while wiring the sensor to
avoid damage from live wires. This is important.

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2. Install shielded or nonshielded two wire twisted

cable from the thermostat to the outdoor sensor
location. Maximum distance is 300 ft. (100m).

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3. Open the sensor case by grasping the side and

pulling the two halves apart.

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4. Choose a protected outdoor location away from

heat sources, usually the north side of the building.

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5. Use the subbase as a template to mark the 

mounting holes and the wire opening on the wall.
Drill size for the wall anchors is 3/16 inch. Drill size
for the wire leads should be 1/2 inch diameter.

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6. From the rear of the base push the end of the

remote sensor through the center of the plastic
plate. Make sure the sensor extends approximately
1/4 inch into the housing.

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7. Using twisted wire cable, connect the leads of the

remote sensor to the cable. Wire nuts are provided
to secure the connection. The wires can be 
connected with either polarity.

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8. Push cable sensor leads through the hole in the

wall. Seal the hole in the wall around the cable to
eliminate any draft that might affect the sensor.

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9. Secure subbase to wall with screws provided. Do

not use hex head screws. Snap cover onto remote
sensor base.

10. Connect the wires on the thermostat subbase to

the sensor terminals. Again, the wires can be 
connected with either polarity. Connect the wires
to the terminal labeled “Outdoor Sensor”.

11. Mount the thermostat on the subbase and check

to be sure that it is showing the temperature.

When a remote outdoor
sensor is connected to the
thermostat, the thermostat
will recognize the sensor.
To adjust balance points
press MENU.

Press the DOWN key to high-
light INSTALLER SETTINGS.
Press SELECT.

Press the DOWN key to 
highlight LOW BALANCE. 
Press SELECT.

Select either the LOW 
BALANCE or HIGH 
BALANCE. Press SELECT.
Using the UP or DOWN 
button, change the balance
point to the desired level. 
Press SELECT.

NOTE: The HIGH and LOW BALANCE points will affect the
upstaging of the thermostat. The 2nd stage heating will not
turn on unless the temperature falls below the HIGH 
BALANCE point. The 1st stage heating will not activate if the 
temperature falls below the LOW BALANCE point. Refer to
the operating manual of your heat pump system for 
recommended HIGH and LOW balance point temperatures.

111-292C

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