TB6575/TB8575 DIGITAL FAN COIL THERMOSTATS
62-0311—05
12
8.5 Fan Speed at motor
start up
0
Provide full power when fan motor starts –
always starts in high fan speed (Default)
High speed start up
ensures that there is
enough torque to start the
motor and eliminates and
motor locking.
1
Disable – fan will start at speed that is needed as
defined by VersaSpeed
9
Number of Fan
Speeds
1
Single Speed Fan
Low speed only
2
2 Speed Fan
Hi and Low speed fans only
3
3 Speed Fan (Default)
Hi, Med, and Low speed fan
9.5 Fan Control Type
0
Constant and Auto (Default)
When fan is in Auto, the fan
ramping algorithm,
VersaSpeed, is used
1
Auto only
10
Control Method for
4-Pipe Auto
Changeover
1
Single Setpoint (Default)
Uses switching differential
to change between heating
and cooling and controls to
a single setpoint (Only
displayed for system types
5 or 7)
2
Heat and Cool Setpoints (2 setpoint method)
Uses a deadband of no
control and controls to a
heat or cool setpoint. (Only
displayed for system types
5 or 7)
10.5 Deadband for Heat/
Cool Setpoints
2 to 9 Range is 2 to 9.
Default is 3. Deadband = minimum
distance between heating and cooling setpoints.
Available when Heat and
Cool Setpoints are chosen
for the control method for 4-
pipe Auto (ISU 10)
Switching
Differential for
Single Setpoint
2 to 6 Range is 2 to 6.
Default is 3.
Heat switching point =
setpoint - switching differential. Cool switching point
= se switching differential.
Available when Single
Setpoint is chosen for the
control method for 4-pipe
Auto (ISU 10)
11
CPH Value for Heat 1 to 12 Range is 1 to 12.
Default is 4
.
The number selected
indicates the maximum
times Heating is cycled on
per hour (CPH). ISU 2
selection is 5.
12
CPH Value for Cool 1 to 6 Range is 1 to 6.
Default is 3
.
The number selected
indicates the maximum
times Cooling is cycled on
per hour (CPH).
13
CPH for Auxiliary
Electrical Heater
1 to 12 Range is 1 to 12.
Default is 6.
The number selected
indicates the maximum
times Auxiliary Heating is
cycled on per hour (CPH).
14
Display
Temperature
Adjustment
-4 to 4 Range is -4°F to +4°F;
Default is 0
°F
.
15
Temperature
Display Mode
0
Display Room Temperature
1
Display Setpoint
2
Display Temperature and Setpoint; Default.
16
Setpoint Range
Stop for Heating
50 to
90
Range is 50°F to 90°F.
Default is 90°F.
17
Setpoint Range
Stop for Cooling
50
to
90
Range is 50°F to 90°F.
Default is 50°F.
18
Keypad Lockout
0
All keys are available (Default)
1
The System button (Heat/Cool) is locked out
2
Both the System and Fan buttons are locked out.
3
All buttons are locked out (System, Fan, Up Arrow,
and Down Arrow). The LCD displays
LOCKED
.
Table 4. Installer Setup (ISU) Codes and Options. (Continued)
ISU
Code Code Description
Option
Value
Option Description (Default value shown in
Bold)
Notes