Operation - Honeywell TB6575B1000/U - SuitePro Digital Fan Coil Stat Installation Instructions Manual

TB6575/TB8575 DIGITAL FAN COIL THERMOSTATS
NOTE: Exiting Installer Test Mode is the same as the
method for entering test mode,
Fig. 25. 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
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
62-0311—05
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
32-199 Displays the pipe
sensor temperature.
Only used for System
Type 3 or 6 (ISU 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

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.
Economy Setback Modes
ACTIVITY SENSING (ISU 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.
BUTTON PRESS SETBACK (ISU CODE #19-5)
The default remote setback option is for economy setback
via a button press on the thermostat. In this mode, the
thermostat can quickly be setback by pressing and
holding down the System Mode button for more than 3
seconds. The LCD displays ECONOMY SETBACK just to
the right of the main temperature display to indicate the
Setback is active. When any key is pressed, the
thermostat controls to Occupied mode.
REMOTE SETBACK (ISU CODE #19)
Remote Setback is activated by a dry contact closure on
the remote setback input from an occupancy sensor, time
switch, or hotel card key. The thermostat controls to the
user/installer defined setback setpoints for increased
energy savings. The LCD displays Economy Setback just
to the right of the main temperature display to indicate the
Remote Setback mode is active.
When Remote Setback is active, all buttons on the
thermostat are disabled. However, the button
combinations to access Installer Setup (ISU) and Installer
Test (IT) remain enabled.
ECONOMY SETBACK OPERATION
For Heat Mode, when Economy Setback is enabled, the
set point changes to the remote setback heating setpoint
(ISU CODE #20).
For Cool Mode, when Economy Setback is enabled, the
set point changes to the remote setback cooling setpoint
(ISU CODE #21).
For 4 pipe applications with Auto Changeover and Heat/
Cool Setpoints, when Economy Setback is enabled, the
cool setpoint changes to the remote setback cooling
setpoint and the heat setpoint changes to the remote
setback heating setpoint. The new effective deadband is
the difference between the remote setback heating
setpoint and the remote setback cooling setpoint.
14