5742637-YIM-D-0620
Johnson Controls Ducted Systems
35
Figure 17: Vent And Combustion Air Hood
Options/Accessories
Electric Heat
Electric heaters are available as 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 instructions for the optional economizer/field installed
motorized damper rain hood can be found in forms 828640
(Simplicity Lite) or 5004617 (Smart Equipment). 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 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.
RRS Economizer Interface Overview
Units with Simplicity Lite Controls will have a field installed
(RRS) 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.
Figure 18: RRS Economizer LCD and Keypad Layout.
Keypad
The 4 navigation buttons illustrated in Figure 18 are used to
scroll through the menus and menu items, select menu items,
and to change parameter and configuration settings.
Using the Keypad with Menus
To use the keypad when working with menus:
• Press the
(enter) button navigates to the next level.
• Each press of the ^ (scroll up) and v (scroll down) buttons
move the > cursor.
• Each press of the esc (cancel) button navigates to the
previous level.
Level 0 of the parameter menu, where either a blank screen is
shown or active Alarm(s) are shown in 20-second intervals, is
displayed following:
• The boot-up sequence
• 45 minutes of menu navigation inactivity
• Multiple presses of the esc (cancel) button
From Level 0 of the parameter menu, navigation to Level 1 of
the menu is done with a press of the ^ (scroll up), v (scroll
down) or
(enter) button.
The LEDs at the center-left of the RRS Economizer Controller
indicate:
• POWER (green)
• Lit whenever 24 volts AC power is present to the RRS
Economizer Controller C and R pins
• FAULT (red)
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.