PI Thermostat TEF
V1.3a, 20100504
© Vector Controls GmbH, Switzerland
Page 1/8
Subject to alteration
TEF
PI Controller and Thermostat
Features
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Controller: Floating point temperature controller and positioner
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On/Off thermostat for 4-pipe or 2-pipe systems with fan function.
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Temperature control depending on room or return air temperature
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Integrated room temperature sensor
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Programmable user and control parameters
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Minimum, maximum set point limitation
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Enable/Disable change of set points and heating/cooling changeover
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Temperature display in Celsius or Fahrenheit
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Selectable Frost protection
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Operating Voltage 24V
Applications
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Individual PI-control of the temperature in rooms that are heated or cooled with 2-pipe systems or 4-
pipe systems using spring return fan coil valves.
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Cost efficient control of pressure dependent VAV units.
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Positioning of an on/off actuator by using the running time of the actuator
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Controlling the temperature output of a simple air-handling unit with one heating or cooling coil.
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Radiator or floor heating, cooling ceiling.
General Description
The TEF is a stand-alone electronic temperature controller with one PI control loop. It features 1 PI sequence
and 2 binary sequences. The TEF features 1 NTC temperature sensor input. One additional function is the
manual positioning of a floating actuator.
The TEF features 2 binary outputs (Relays). A detailed parameterization is possible with the use of a simple
configuration routine. The TEF can be configured using the standard operation terminal. No special tools or
software is required.
Ordering
Item Name
Description/Option
TEF
Compact PI controller 1 TI internal & external, 2 DO (Relays)
TEM
Compact PI controller 1AI, 1 TI int & ext, 1 AO
Selection of actuators and sensors
Temperature Sensors: Use only our approved NTC sensors to achieve maximum accuracy. Recommended is
SDA-Tn10-20 as Duct sensor, SRA-Tn10 as Room sensor and SPA-Tn10-10 as immersion sensor.
Floating Actuators: Any actuators with less than 250 VAC, 100W are acceptable. Actuators with constant
running time are preferred for optimum functionality.
Binary auxiliary devices: E.g. pumps, fans, on/off valves, humidifiers, etc. Do not directly connect devices that
exceed 250 VAC, 100W.