Engineering Manual

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4 to 5 feet
above the floor
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TEMP
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TEMP
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comfort levels in the conditioned space, the wired controller must be installed in
a location away from direct sunlight, high humidity, and where it could be directly
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floor where its LED display can be read easily, in an area with good air circula-
tion, and where it can detect an average room temperature.
Do not install the wired controller near or in:
• Drafts or dead spots behind doors and in corners
• Hot or cold air from ducts
• Radiant heat from the sun or appliances
• Concealed pipes and chimneys
• An area where temperatures are uncontrolled, such as an outside wall
Wired Controller Placement
Assigning the Thermistor for Temperature Detection
Each indoor unit includes a return air thermistor assigned to sense the temperature. If a wired controller is installed, there is a choice of
sensing temperature with either the indoor unit return air thermistor or the thermistor in the wired controller. It is also an option to set both
thermistors to sense temperature so that indoor unit bases its operation on the first thermistor to reach the designated temperature differen-
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conjunction with a wired controller thermistor as previously described.
Hanging the Wired Controller
1. The controller wiring / cable can be installed in one of three directions: top,
back, or on the right side. If top or right side installation is desired, remove
cable guide grooves on the controller, and then position wiring / cable on ap-
plicable side.
2. Choose and mark the area of installation, and then screw the wall plate into
place (using the provided parts). Install the controller wall plate to fit the elec-
trical box if one is present. Ensure that no gaps exist between the wall plate
and the wall itself.
3. Arrange wiring / cables so as not to interfere with the controller circuitry.
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bottom part of the wired controller onto the wall plate. Make sure that no gaps
exist between the wired controller and the wall plate on all sides.
 To remove wired controller from the wall plate, insert a screwdriver into the
two holes at the bottom. Twist screwdriver to release controller.
Do not
damage the controller components when removing.
Back
To p
To p
Right
Side
Right
Side
Wall Wall
Wall Wall
Installing the Controller
Removing the Controller
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Figure 236: Attaching
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Figure 237: Installing /
Removing the Controller.
VERTICAL-HORIZONTAL INDOOR UNITS
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VERTICAL-HORIZONTAL | 163
Vertical-Horizontal Air Handling
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