Hydronic Controls
New T6570 Series
Digital Fan Coil Thermostats
T6570 Digital Fan-Coil thermostats
provide line voltage on/off control for
fans, valves, compressors or auxiliary
electric heaters in fan-coil and small air
conditioner applications.
Models are available for control of
various fan-coil units, such as:
– 2-pipe.
– 2-pipe with manual heat/cool
changeover.
– 2-pipe with auxiliary electric heater.
– 4-pipe with manual heat/cool
changeover.
– 4-pipe with automatic heat/cool
changeover.
– Single stage air conditioning
Changes in output wiring and external
links between wiring terminals configure
the thermostat for the appropriate
application.
The fan is also controlled from the
thermostat. With most models there is a
choice of running the fan continuously,
or cycling it with the thermostat.
The OFF-ON switch turns both the fan
and system off.
Compressors and auxiliary electric
heaters can be controlled using a relay or
contactor switched by the thermostat.
www.honeywell.com
Key features:
• Simple user interface.
• Pushbutton setpoint adjustment.
• Digital display of ambient temperature
• Digital display of mode icons when
cooling or heating relays operate, or
when energy savings mode is active.
• Switches for selection of system opera
tion and fan speed.
• Proportional plus integral (P+I) control
algorithm for precision temperature reg
ulation.
• Direct mounting onto wall or standard
junction box or vertical junction box
with optional adapter plate.
• Energy savings mode input from time
switch, occupancy sensors or hotel card
key. Overrides comfort setpoint with set
back heating or cooling setpoint.
• Installer setup mode for
changing operating parameters.
• Selectable ˚C or ˚F display.
• LCD display of setpoint only or ambient
temperature plus setpoint.
• Adjustable deadband (auto changeover
models) for heat and cool control.
• Energy savings input configurable,
normally open or normally closed.
• Selectable energy saving setup cooling
and setback heating setpoints.
• Adjustable maximum heating and
minimum cooling setpoint limits.
• Adjustable minimum relay off-times
(heating or cooling) for compressor
short-cycle protection.
• EEPROM memory retention
(no batteries required).
• Custom logo option.
