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Johnson Controls Unitary Products
Figure 17: Vent And Combustion Air Hood
Options/Accessories
Electric Heat
Electric heaters are available as factory-installed options or
field-installed accessories. Refer to electric heat instructions for
installation. These heaters mount in the heat compartment with
the heating elements extending into the supply air chamber. All
electric heaters are fused and intended for use with single point
power supply.
Economizer/Motorized Damper and Rain Hood
The instruction for the optional economizer/motorized damper
rain hood can be found in form 5004998. Use these instructions
when field assembling an economizer rain hood onto a unit. The
outdoor and return air dampers, the damper actuator, the
damper linkage, the outdoor and return air divider baffles, and all
the control sensors are factory mounted as part of the “Factory
installed” economizer/motorized damper options.
Power Exhaust/barometric Relief Damper and Rain Hood
The instructions for the power exhaust/barometric relief damper
and rain hood can be found in form 1200060.
All of the components, including the dampers, hardware, and
mounting instructions are shipped in a single package external
from the unit and must be field assembled and installed.
Power exhaust is only available as a field installed accessory.
Economizer And Power Exhaust Set Point
Adjustments
Remove the top rear access panel from the unit. Locate the
economizer control module, where the following adjustments
will be made.
Minimum Position Adjustment
• Check that the damper blades move smoothly without
binding; carefully turn the Minimum Position Adjust screw
(found on the damper control module) fully clockwise and
then set the thermostat indoor fan switch to the ON
position and then OFF or energize and de-energize
terminals “R” to “G”.
• With the thermostat set to the indoor fan ON position or
terminals “R” to “G” energized, turn the Minimum Position
Adjusting screw (located on the damper control module)
counterclockwise until the desired minimum damper
position has been attained.
Jade Economizer Interface Overview
Units with Simplicity Lite Controls will have a field installed
(Jade) Economizer Kit Offered.
This section describes how to use the Economizer’s user
interface for:
• Keypad and menu navigation
• Settings and parameter changes
• Menu structure and selection
User Interface
The user interface consists of an LCD display and a 4-button
keypad on the front of the Economizer module. The LCD is a 16
character by 2 line dot matrix display.
Figure 18: Economizer LCD and Keypad Layout.
An adhesive backed label is provided over the outside of
the combustion air inlet opening to prevent moisture
from entering the unit, which could cause damage to
electrical components. Allow this closure label to remain
in place until the combustion air hood is to be installed.
Extreme care must be exercised in turning all set point,
maximum and minimum damper positioning adjustment
screws to prevent twisting them off.
MENU UP
(EXIT)
BUTTON
SCROLL
(UP/DOWN)
BUTTONS
SELECT (ENTER)
BUTTONS
2 LINE
LCD
