Sequence Of Operations; Configuration Options - Honeywell SuitePRO TB6575 Quick Manual

TB6575/TB8575 SUITEPRO™ DIGITAL FAN COIL THERMOSTATS

SEQUENCE OF OPERATIONS

The heating and cooling setpoints shall be individually
adjustable for both the Occupied and Unoccupied periods.
The thermostat shall have a minimum deadband of 2°F (no
mechanical heating or cooling shall operate within this
deadband when Auto Changeover mode is enabled). Space
temperature deviation above the cooling setpoint or below the
heating setpoint shall generate a demand signal to control the
system as follows:
A. HEATING:
The thermostat shall control the heating output based on the
demand signal communicated from the thermostat program,
taking into account both space temperature deviation
(proportional gain), the duration of that temperature deviation
(integral gain).
The thermostat shall energize heating equipment when space
temperature falls below heating setpoint.
B. COOLING:
The thermostat shall control the cooling output based on the
demand signal communicated from the thermostat program,
taking into account both space temperature deviation
(proportional gain), the duration of that temperature deviation
(integral gain).
The thermostat shall energize cooling equipment when space
temperature exceeds cooling setpoint.
C. ECONOMY MODE REMOTE SETBACK:
Initiation of heating setback or cooling setback occurs when
the remote setback is enabled or the activity sensor mode is
enabled. When all or a portion of a manually programmed
schedule is unavailable, the thermostat shall control to the
default program as shown in Table 1.
Table 1. Remote Setback Ranges.
Heating Setpoints 50 to 70°F (10 to 21°C)
Cooling Setpoints 72 to 90°F (22 to 32°C)
D. SEASONAL CHANGEOVER / PIPE SENSOR:
A pipe sensor is required for 2-pipe Auto Changeover or for 2-
pipe with auxiliary heat applications. These applications
support the pipe sensor as a normally open or normally
closed input from an Aquastat® or as an analog input from a
20K Ohm pipe sensor. The analog sensor has an adjustable
hot and cold threshold for adjusting the changeover
deadband. A 5 minute pipe purge to open the heating/cooling
valve is performed whenever there is a need to change
modes.
E. FAN OPERATION:
Fan operation is configurable for Auto only (optional), constant
fan speed only (Lo, Med, Hi), or both.
a. Auto: fan is energized with calls for heating and
cooling. Auto uses the VersaSpeed™ fan ramping
algorithm to automatically select the correct fan
speed
b. Lo, Med, Hi: fan operates continuously in Occupied
mode, and during a call for heat or cool in the Unoc-
cupied mode. Uses the Gl, Gm, Gh, fan relays.
c. Auto Fan Reset (optional): resets the fan from a con-
stant fan speed (Lo, Med, Hi) to Auto after 2 or 4
hour time period. Saves energy and fan usage.
63-4373—03
Range Default
64°F (18°C)
79°F (26°C)
F. AUTO CHANGEOVER (4-PIPE MODE):
In 4-pipe Auto Changeover mode, use the Up and Down arrow
buttons to change the setpoint. Use the System button to
switch between the heating setpoint and the cooling setpoint.
A configurable deadband separates the higher cooling
setpoint from the lower heating setpoint.
G. POWER INTERRUPTION:
On loss of power, the thermostat shall maintain for 10 years
the configuration selections set in the Installer Setup menu.
H. ACTIVITY SENSING (OPTIONAL):
If the thermostat keypad is not touched during a 4, 12, or 24
hour duration, the thermostat falls back to the Economy mode
unoccupied setpoints to save energy and places the fan in
Auto mode.
I. FREEZE PROTECTION (OPTIONAL):
The thermostat cycles on heat when the room temperature
reaches 40°F (4°C), and disables heat when the room
temperature reaches 46°F (8°C).
J. AUTO FAN RESET (OPTIONAL):
This optional feature resets the fan from a constant on fan
speed (low, medium, high) to Auto after a 2 or 4 hour delay.
The start time for the delay is calculated after an initial call for
heat or cool is satisfied.

CONFIGURATION OPTIONS

1. System Application Configuration
a. Heat only.
b. Cool only.
c. 2-pipes; heat or cool; Manual Changeover.
d. 2-pipes; heat or cool; Auto Changeover (requires
pipe sensor).
e. 4-pipes; Manual Changeover.
f. 4-pipes; Auto Changeover.
g. 2-pipes with Auxiliary heat (requires pipe sensor).
h. 4-pipes; Manual and Auto Changeover.
2. Line Voltage
a. 120 Vac power supply.
b. 240 Vac power supply.
c. 277 Vac power supply.
3. Temperature Display Mode
a. Display room temperature and a setpoint (heat or
cool).
b. Display heat and cool setpoints only.
c. Display room temperature only.
4. Remote Setback
Occupancy sensors, manual time clock inputs, and DDC
night setback can be used to provide inputs to remotely set
back the thermostat. Unoccupied heating and unoccupied
cooling setpoints are available to configure the setback
setpoints. The remote setback inputs receive dry contact
input (normally open or normally closed) with either a 2
minute or 30 minute delay to the unoccupied mode.
5. Lockout
Lockout configurations are optional and can provide restric-
tions on access to setpoint, system, and fan changes.
6. Valve Output
Available as either normally open or normally closed.
7. Range Stops
Available from 50 to 90°F (10 to 32°C) for both the heating
and cooling setpoint.
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