Honeywell TB6575B1000/U Installation Instructions - Page 11

Setup TB6575/TB8575 DIGITAL FAN COIL THERMOSTATS M27585 Fig. 24. Installer Setup (ISU) mode screen. Table 4. Installer Setup (ISU) Codes and Options. ISU Option Option Description (Default value shown in Code Code Description Value Bold) 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 5 Four pipes: Auto Changeover 6 Two pipes: Heat or Cool; with Auxiliary Heat (requires optional pipe sensor). 2.5 Fan On/Off Selection for Aux Heat On 7 Four pipes: Manual and Auto Changeover (Default) 0 Fan ON when Auxiliary Heat is on (Default) 1 Fan OFF when Auxiliary Heat is on Notes TB6575A, TB8575A only TB6575A, TB8575A only Allows auxiliary heat to turn on when pipes have cold water (TB6575A, TB8575A only). TB6575A, TB8575A only Enables or disables the auto fan operation when Auxiliary Heat is On (TB6575A, TB8575A only). 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 0 Contact Open = Cool mode; Contact Closed = Heat • Pipe sensor will flash on mode display screen if analog Only displays when value 3 or 6 for the System Type in ISU code #2 is selected. 1 2 Contact Open = Heat mode; Contact Closed = Cool • mode Contact Open = Heat mode; Contact Closed = Cool mode (same as 1) 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 3 Contact Open = Cool mode; Contact Closed = Heat details) 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 Range is 50°F to 72°F. Default is 60°F. 72 Changes to Cool when pipe temperature is below threshold. 7 Pipe Sensor Threshold for Heating 75 to Range is 75°F to 90°F. Default is 80°F. 90 Changes to Heat when pipe sensor temperature is above threshold. 8 Temperature Scale 0 Degrees Fahrenheit (°F); Default. 1 Degrees Celsius (°C). 11 62-0311-05