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TB6575/TB8575 SUITEPRO™ DIGITAL FAN COIL THERMOSTATS
62-0278—07 14
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. 25. Installer Test (IT) mode screen.
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 con-
trol errors of proportional-only control, but it
is slower to react to large temperature or set-
point changes.
Economy Setback Modes
ACTIVITY SENSING (IS CODE #22)
If Activity Sensing is enabled, any time the thermostat is
not touched (no single key is pressed) for the duration
selected, the thermostat automatically falls back into the
Economy Setback. The LCD displays ECONOMY
SETBACK just to the right of the main temperature display
to indicate Activity Sensing mode is active. When any key
is pressed, the thermostat controls to Occupied mode.
M27587
Test
Table 5. Installer Test (IT) Codes and Options.
IT
Code
Code
Description
Option
Value Option Description
10 Heat Control 0 Close
1 Open
20 Auxiliary Heat
Control
0 Close
1 Open
30 Cool Control 0 Close
1 Open
40 Fan Control 0 Close
1 Low Speed
2 Medium Speed
3 High Speed
50 Pipe Sensor 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.
71 Software Main
version
01-99 A 2-digit number, 01-99
72 Software Vice
version
01-99 A 2-digit number, 01-99
73 Configuration
Data Main version
01-99 A 2-digit number, 01-99
74 Configuration
Data Vice version
01-99 A 2-digit number, 01-99
75 Week Produced 01-52 A 2-digit number, 01-52
76 Year Produced 08-99 A 2-digit number, 08-99