Engineering Manual

Installation and Best Layout Practices
DUCT (LOW STATIC) INDOOR UNITS
Figure 148:Removing the Cable Guide Grooves.
Hanging the Wired Controller
1. The controller wiring / cable can be installed in one of three direc-
tions: 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 applicable 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 electrical 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. Position the wired controller on the wall plate. Snap into
place by pressing the 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.
4. To remove wired controller from the wall plate, insert a screw-
driver into the two holes at the bottom. Twist screwdriver to
release controller. Do not damage the controller components
when removing.
Back
Top
Top
Right
Side
Right
Side
Wall Wall
Wall Wall
Installing the Controller
Removing the Controller
Figure 149:Attaching the Wall Plate.
Figure 150: Installing / Removing
the Controller.
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-
tial. For applicable indoor units, an optional Remote Temperature Sensor can be used in lieu of the return air thermistor—either alone or in
conjunction with a wired controller thermistor as previously described.
4 to 5 feet
above the floor
NO
NO
NO
YES
Remote Controller
TEMP
Remote Controller
TEMP
Re
m
ot
e
C
o
n
t
r
ol
l
er
TEMP
Wired controllers include a sensor to detect room temperature. To maintain 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 exposed to
cold air. Controller must be installed four (4) to five (5) feet above the floor where its
LED display can be read easily, in an area with good air circulation, 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
Figure 151:Proper Location for the Wired Controller.
Due to our policy of continuous product innovation, some specications may change without notication.
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108 | DUCT (LOW STATIC)
Multi F and Multi F MAX Indoor Unit Engineering Manual
MULTI
F
MAX
MULTI
F