electronic thermostats
Controls
Thermostats
Description
Features
• Carrier electronic thermostat
range is available for all Carrier
hydronic terminals ranges:
- Type A - two-pipe application
with AC motors
- Type B - four-pipe or two-pipe
applications with electric
heaters with AC motors
- Type C - two-pipe application
with EC motors
- Type D - four-pipe or two-pipe
applications with electric
heaters with EC motors
• The thermostat for fan coil units
with EC motor option controls
three configurable discrete
speeds via an 0-10 V signal.
• The electronic thermostat set range
is from 10°C to 30°C, with the
possibility to limit the temperature
in public buildings where low
energy consumption is a key
requirement. This is done via a
dip-switch inside the control
(cooling range 23°C/30°C, heating
range 10°C/21°C).
• Auto fan: the control automatically sets the fan speed. If the room temperature
is far from the set point, high fan speed is selected. As the room temperature
approaches the desired value, the fan speed decreases to the minimum speed.
• Automatic changeover from cooling to heating mode, based on the water
temperature, ensures that the ideal room temperature is maintained.
• Remote changeover - automatic changeover from cooling to heating mode,
based on the remote signal from the monitoring system.
• Frost protection keeps the room temperature above a minimum level.
• Booster heating control optimisation (with electric heater option): with the water
temperature below 30°C the system will be in heat demand mode and the electric
heater is the only available heating source. If the water temperature is above 35°C
the system will be in booster heating mode, energising water valve and electric
heater together. This function is deactivated if the water temperature is above
45°C (the electric heater will be de-energised).
• Energy saving when the room is unoccupied, without the need to switch off the
unit. If the energy-saving button is pressed, the actual set point will be modified
as follows, without changing the position of the set point selection knob: ± 4 K.
• LED intensity (offices or light commercial applications) - 10 seconds after the last
user interface use all LEDs are reduced in intensity. To avoid disturbing hotel guests,
the thermostat can be configured from “Night Mode” to “Dark Mode”: 10 seconds
after the last user interface use, all LEDs are switched off.
• Air sampling: with no fan request and the air sampling jumper in ON position,
the control performs the air sampling function. The air in the room is moved,
thermal stratification is reduced for a more reliable ambient temperature reading.
• Continuous fan (no fan request and continuous fan jumper ON): the control selects
the fan speed, regardless of thermal station conditions. With fan in auto fan mode
and control not in the demand phase, the fan permanently runs at low speed.
• External contact: A high voltage input signal for external contact is present. If the
contact is activated, device behaviour depends on its configuration on site:
- Presence detection energy saving mode is activated, room temperature is
raised by 4 K in cooling mode and reduced by 4 K in heating mode.
- Window contact: in OFF mode (window open), all outputs are disconnected
(fan, valves, etc.) and only the frost protection function is active, if enabled.
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