Honeywell SUITEPRO TB6575, Installation Instructions Manual, Page: 11 / 20

TB6575/TB8575 DIGITAL FAN COIL THERMOSTATS
11 62-0311—05
Fig. 24. Installer Setup (ISU) mode screen.
M27585
Setup
Table 4. Installer Setup (ISU) Codes and Options.
ISU
Code Code Description
Option
Value
Option Description (Default value shown in
Bold) Notes
1 Line Voltage
Selection 0 120 Vac power supply (Default)
1 240 Vac power supply
2 System Type 0 Heat only
1 Cool only
2 Two pipes: Heat or Cool; Manual Changeover
3 Two pipes: Heat or Cool; Seasonal Changeover
(requires optional pipe sensor)
4 Four pipes: Manual Changeover TB6575A, TB8575A only
5 Four pipes: Auto Changeover TB6575A, TB8575A only
6 Two pipes: Heat or Cool; with Auxiliary Heat
(requires optional pipe sensor). Allows auxiliary heat to turn
on when pipes have cold
water
(TB6575A, TB8575A only).
7 Four pipes: Manual and Auto Changeover
(Default) TB6575A, TB8575A only
2.5 Fan On/Off
Selection for Aux
Heat On 0 Fan ON when Auxiliary Heat is on (Default) Enables or disables the
auto fan operation when
Auxiliary Heat is On
(TB6575A, TB8575A only).
1 Fan OFF when Auxiliary Heat is on
3 Valve Output Type 0 Valve energized on call for heat or cool (Default)
1 Valve de-energized on call for heat or cool
4 Space Sensor Type 0 Onboard Sensor (Default)
1 Remote Sensor (TR21 or other 20K Ohm sensor)
5 Pipe Sensor
Only displays when
value 3 or 6 for the
System Type in ISU
code #2 is selected.
0 Contact Open = Cool mode; Contact Closed = Heat
mode • Pipe sensor will flash on
display screen if analog
input (#4) is lost.
• Pipe sensor status and
water temperature can
be checked in test mode
(see “Installer Test (IT)
Mode” on page 13 for
details)
1 Contact Open = Heat mode; Contact Closed = Cool
mode
2 Contact Open = Heat mode; Contact Closed = Cool
mode (same as 1)
3 Contact Open = Cool mode; Contact Closed = Heat
mode (same as 0)
4 Analog input (Default). NTC20K, whose curve is
the same as TR21.
Only displays when system type 3 or 6 is selected.
6 Pipe Sensor
Threshold for
Cooling 50 to
72
Range is 50°F to 72°F. Default is 60°F. Changes to Cool when pipe
temperature is below
threshold.
7 Pipe Sensor
Threshold for
Heating 75 to
90
Range is 75°F to 90°F. Default is 80°F. Changes to Heat when pipe
sensor temperature is
above threshold.
8 Temperature Scale 0 Degrees Fahrenheit ( °F ); Default.
1 Degrees Celsius ( °C ).