Operation; Operating Modes; System Status Indicators; Comfort Mode - Honeywell TB6575 SuitePRO Installation Instructions Manual

TB6575/TB8575 SUITEPRO™ DIGITAL FAN COIL THERMOSTATS
IS Code Option
Code Description Value
23 Freeze 0
Protection
1
24 Auto Fan 0
Reset
1
2
Installer Test (IT) Mode
Installer Test Mode allows you to simulate the operation of the
the thermostat for your application and view the version control
information of the thermostat.
To enter Installer Test Mode:
• Press and hold both the Up arrow button and the Down
Arrow button for three (3) seconds.
This displays all segments of the LCD screen on the LCD. See
Fig. 23 on page 9.
Table 5 provides the Test codes (IT codes) and values. To enter
the IT codes:
1. Press the System (Heat/Cool) button to cycle through the
IT codes, which display in the upper right above the word
.
teSt
2. Press the Up or Down Arrow buttons to cycle through the
values for the currently displayed IT code. The values
display in the center of the screen.
3. After the desired value displays, press the System button
to store your value selection and display the next IT code.
NOTE: Exiting Installer Test Mode is the same as the method
for entering test mode,
Fig. 26. Installer Test (IT) mode screen.
Table 5. Installer Test (IT) Codes and Options.
IT Code
Code Description
10 Heat Control
20 Auxiliary Heat
Control
30 Cool Control
40 Fan Control
62-0278—01
Table 4. Installer Setup (IS) Codes and Options. (Continued)
Option Description (Default value shown in Bold)
Disabled; Default
Enabled – Stat cycles On Heat when room temperature
reaches 40°F (4°C), and disables Heat when room
temperature reaches below 46°F (8°C). The LCD displays
.
Freeze prOteCt
Inactive; Default
Resets back to Auto after 2 hours. The start time is calculated
after the initial call for Heat/Cool is satisfied. Then, the two (2)
hour timing begins.
Resets back to Auto after 4 hours. The start time is calculated
after the initial call for Heat/Cool is satisfied. Then, the four (4)
hour timing begins.
Test
M27587
Option
Value Option Description
0 Close
1 Open
0 Close
1 Open
0 Close
1 Open
0 Close
1 Low Speed
2 Medium Speed
3 High Speed
Table 5. Installer Test (IT) Codes and Options. (Continued)
IT Code
Code Description
50 Pipe Sensor
71 Software Main
version
72 Software Vice
version
73 Configuration
Data Main version
74 Configuration
Data Vice version
75 Week Produced
76 Year Produced

OPERATION

PROPORTIONAL + INTEGRAL (P+I) CONTROL
Like a mechanical thermostat, the fan coil thermostats have On/
Off control output. However, this output is regulated by a P+I
algorithm, enabling the thermostat to control closer to setpoint
than conventional thermostats. This results in performance
where the space temperature is maintained within 0.75°C (1.5°F)
of the setpoint regardless of fan speed.
NOTE: Integral action corrects the temperature control errors
of proportional-only control, but it is slower to react to
large temperature or setpoint changes.

Operating Modes

System Status Indicators

When the system status is in Heat, the thermostat displays
"Heat" solidly in the display. When the heating device is active,
"Heat On" displays on the LCD
When the system status is in Cool, the thermostat displays "Cool"
solidly in the display. When the cooling device is active,
"Cool On" displays on LCD
When the system status is in Auto Changeover, the thermostat
displays "Auto" solidly in the display.

Comfort Mode

This is the normal operating mode where the thermostat controls
to the setpoint selected by the user. On power-up, the user
setpoint returns to the last known or default value. Control action
is determined by either the default settings or the installer-set
parameters; see "Installer Setup (IS) Mode" on page 10.
12
OPERATION
Notes
This feature can not activate when
the application is Cool only.
Auto Fan Reset is not allowed (does
not display) when the fan control type
is set to Cycle, (IS code #9 - value 1).
Option
Value Option Description
32-199 Displays the pipe sensor
temperature.
Only used for System Type 3
or 6 (IS code #2, value 3 or
6). Only the Analog pipe
sensor is tested.
01-99 A 2-digit number, 01-99
01-99 A 2-digit number, 01-99
01-99 A 2-digit number, 01-99
01-99 A 2-digit number, 01-99
01-52 A 2-digit number, 01-52
08-99 A 2-digit number, 08-99