11
SPACE TEMPERATURE SENSOR (T58) — The T58 Space
Temperature Sensor (Part No. CEPL130464-01) is a field-
installed accessory. The T58 sensor communicates with the
ComfortLink™ controller, providing space temperature, heat-
ing and cooling set points, and mode operation information.
The jumper wire in the installer’s packet must be connected be-
tween R and W1 when using a T58 device.
SPACE TEMPERATURE SENSOR CALIBRATION —
The temperature reading of the space temperature sensors can
be calibrated. Refer to the Space Temperature Sensor Calibra-
tion and Trim section on page 31 for more information.
ECONOMIZER
—
The economizer accessory (Part No.
CRECOMZR009A00) is a field-installed accessory. When in-
stalling this accessory, the unit must be configured for econo-
mizer installation by setting EC.EQ to YES. The default settings
for the other economizer configurations should be satisfactory.
If they need to be changed, additional information about these
configuration settings can be found in the Economizer section.
POWER EXHAUST — The power exhaust accessories
(Part No. CRPWREXH018A00, CRPWREXH019A00,
CRPWREXH020A00) are field-installed accessories for
power exhaust for different voltages. When installing this
accessory, the unit must be configured for power exhaust
installation by setting PE.EN to YES. The default settings for
the other power exhaust configurations should be satisfactory.
If they need to be changed, additional information about these
configurations can be found in the Power Exhaust section.
INDOOR AIR QUALITY — The indoor air quality (IAQ)
accessory (Part No. CRCBDIOX001A00) is a field-installed
accessory. This sensor measures CO
2
concentrations in the unit
return. The defaults for IAQ configurations should be satisfac-
tory; however, if they are not, additional information about
these configurations can be found in the Indoor Air Quality
section.
SMOKE DETECTOR — The smoke detector accessory
(Part No. CRSMKDET001A00) is a field-installed accessory.
This accessory detects smoke in the return duct. When install-
ing this accessory, set the switch configuration to normally
open or normally closed as wired (FS.SW). Normally closed
(2) is the preferred configuration.
FILTER STATUS — The filter status accessory (Part No.
CRSTATUS002A00) is a field-installed accessory. This accesso-
ry detects plugged filters. When installing this accessory, set the
switch configuration to normally open or normally closed as
wired (FL.SW). Normally open (1) is the preferred configuration.
FAN STATUS — The
fan
status
accessory
(Part
No. CRSTATUS003A00) is a field-installed accessory. This
accessory detects when the indoor fan is blowing air. When in-
stalling this accessory, set the switch configuration to normally
open or normally closed as wired (FN.SW). Normally open (1)
is the preferred configuration.
ENTHALPY SENSORS — The enthalpy accessories (Part
No. CRENTSNG001A00 or CRDENTDIF001A00) are field-
installed accessories. The first accessory (outdoor air only)
determines when the enthalpy is low relative to a fixed refer-
ence. The second accessory (outdoor and return enthalpy are
measured) compares the enthalpy between the outdoor and
return airstreams. In each case, the enthalpy 4-20mA signals
are converted to a switch output which is read by the ECB.
When installing this accessory, set the switch configuration to
normally open or normally closed as wired (EN.SW).
Normally open (1) is the preferred configuration.
CONTROLS AND FUNCTIONS
Marquee Display Usage —
See Fig. 7 and Tables 7-21.
The display module provides the user interface to the
ComfortLink control system. The display has up and down ar-
row keys, an
key, and an
key. These keys
are used to navigate through the different levels of the display
structure. See Table 7. Press the
key until the dis-
play is blank to move through the top 11 mode levels indicated
by LEDs on the left side of the display.
When a specific item is located, the display will flash show-
ing the operator the item, followed by the item value and then
followed by the item units (if any). Press the
key to
stop the display at the item value. Items in the Configuration
and Service Test modes are password protected. The display
will flash PASS and WORD when required. Use the
and arrow keys to enter the 4 digits of the password. The de-
fault password is 1111.
Pressing the
and
keys simultaneously
will scroll a clear language text description across the display
indicating the full meaning of each display acronym. Pressing
the
and
keys when the display is blank
(Mode LED level) will return the display to its default menu
of rotating display items. In addition, the password will be
disabled requiring that it be entered again before changes can
be made to password protected items.
Changing item values or testing outputs is accomplished in
the same manner. Locate and display the desired item. Press the
key to stop the display at the item value. Press the
key again so that the item value flashes. Use the
arrow keys to change the value or state of an item and press the
key to accept it. Press the
key and the
item, value, or units display will resume. Repeat the process as
required for other items. See Tables 7-21 for further details.
Clearing Unit Alarms —
The unit alarms can be cleared
through the ComfortLink display. To check the current alarms,
enter into the Alarms menu. The first submenu is the CURR
submenu. The CURR function displays the list of current
alarms (maximum of 25). The second submenu item is the
R.CUR (Reset Current Alarms) function. Press
to re-
set the current alarms. The next submenu item, HIST, displays
the list of cleared alarms (maximum of 20). The HIST function
can be cleared with the R.HIS function. See Tables 21 and 22.
ECONOMIZER CALIBRATION — Because of a mechani-
cal problem with the economizer, the actuator might acquire a
new degree of rotation which is less than 90 degrees. If this
occurs, a “T414 Economizer Damper Actuator Out of Calibra-
tion” alert will be generated. The economizer calibration proce-
dure (E.CAL under the INDP submenu) will reconfigure the
actuator to the new fully closed and fully open positions. To
implement the calibration procedure, change E.CAL from OFF
to ON. E.CAL will remain ON as long as the calibration proce-
dure is being implemented (as long as 5 minutes). During the
calibration procedure the actuator will close fully and then
open fully. After the calibration is complete, the degree of rota-
tion should be greater than 90 degrees, causing the T414 alarm
to clear. If the T414 alert does not clear, check the economizer
damper for other mechanical problems.
IMPORTANT: A T58 sensor can only be used with unit
running Version 2.0 or higher of the unit software. If a
T58 sensor is installed but will not function with the 48/
50HG unit, check the unit software version with the
ComfortLink controls. The new version of the software
may need to be loaded into the unit controls.
ESCAPE
ENTER
ESCAPE
ENTER
ENTER
ESCAPE
ENTER
ESCAPE
ENTER
ENTER
ENTER
ENTER
ESCAPE
ENTER
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