14
ECONOMIZER SETTINGS
Interface Overview
ECONOMIZERONE
The field-installed accessory consists of the following:
• Low Leak Economizer Assembly
• HH79NZ039 OA Dry Bulb Sensor
• HH79NZ039 Mixed Air Sensor
• POL 224 Controller
• 48TC005897 Harness
POL 224 ECONOMIZER MODULE WIRING
The economizer controller used on electromechanical units is a
Siemens POL 224 which is to be located the RTU base unit’s con
-
trol box. See Fig. 27 for button description of the POL 224 con-
troller. See the Installation Instruction for the base unit location of
the control box access panel. Refer to Fig.
13.
The POL 224 controller provides the following:
1. One-line LCD — After a period of inactivity, the controller
displays the default HMI screen (free cooling status,
1FREE-COOL YES or 1FREE COOL NO). See Fig. 27-31.
2. Operation button (Up button) — Move to the previous value,
step, or category.
3. Operation button (Down Button) — Move to the next value,
step, or category.
4. Operation Button (Enter Button):
a. Press Enter to edit the current value or option.
b. Press Enter to confirm a newly selected value or option.
c. Press Enter + Up to jump up one entire category.
d. Press Enter + Down to jump down one entire category.
User Interface and Keypad
The controller user interface consists of an LCD display and a
3-button keypad for input. The LCD is a 16 character by 1-line dot
matrix display. The keypad is used to navigate and change the de
-
sired menu items on the display. See Fig. 27.
The Climatix
™1
mobile application allows for installation, com-
missioning, and servicing. Scanning a QR code on the controller
allows users to download the Climatix
™
mobile application on
Android™
1
or Apple iOS
®1
, but a Wi-Fi/WLAN stick is needed.
See Fig. 27 and 28. Plug Wi-Fi/WLAN stick into controller USB
port for temporary connection for mobile application setup. Each
Wi-Fi/WLAN stick can be used for multiple units.
Menu Structure
Menus are displayed in the economizer controller as per
categories. There are eight first-level menus, each of which is rep-
resented by a number at the beginning of the line on the LCD.
Pressing Enter + Up or Down can toggle between different first-
level menus. Submenus follow the numbered first-level menus
closely. Pressing Up or Down can toggle between different
submenus.
At the end of the line, the LCD displays the value of the current
submenu (if any). If the value is editable, then pressing Enter will
put terminal in the Edit mode. The value is then highlighted for
change. After making a change by pressing Up or Down, press
Enter to confirm the change and exit the Edit mode. See Fig.
30.
Powering the Economizer Controller
Connect a 24 vac external power supply source to the following
terminals to power the economizer controller. See Fig.
29.
LED indication
NOTE: If different faulty events occur at the same time, then
sensor/DAC LED lights up following the priority below: Red
Yellow Off. For example, if there is a humidity sensor error
and air temperature failure at the same time, then the sensor
LED turns red rather than yellow. See Fig.
31 and Table 9.
Fig. 27 — POL 224 Controller
Fig. 28 — Wi-Fi/WLAN Stick
1. Third-party trademarks and logos are the property of their respective
owners.
IMPORTANT: After the Economizer controller enters the
running state, it may take one minute for peripheral devices to
complete initialization. Before that, LED indication might be
unstable.
12 3
4
5
6
NOTE: QR codes in this image are for reference only.
NO. DESCRIPTION
1 USB port for Wi-Fi/WLAN stick
2 QR code to download Climatix
™
mobile application
3
One-line LCD. After a period of inactivity, the controller
displays the default
HMI screen (free cooling status, 1FREECOOL YES or
1FREECOOL NO)
4
Operation button (Up button) — Move to the previous
value, step, or category
5
Operation button (Down button) — Move to the next
value, step, or category
6
Operation button (Enter button):
• Press to edit the current value or option.
• Press to confirm a newly selected value or option.
• Press Enter + Up to jump up one entire category.
• Press Enter + Down to jump down one entire
category.
NOTE: QR codes in this image are for reference only.
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