REX EC - heat recovery controller, air handling units, recuboxes and heat recovery kits with EC fans

GENERAL INFORMATION

The RekupeX REX EC controller is an electronic controller with a large LCD display designed to control air handling units, recuboxes and recuperation sets with fans with EC motors. The controller allows you to control air handling units with a 0-10 V signal (e.g. with commutated motors) and with additional equipment. (switched contact) REX EC allows you to set the ventilation intensity based on a programmed work plan or works in manual mode.

Thanks to the switching contact (relay R), the controller has additional functions:

The controller, thanks to relay R, allows the device to be switched on (thermostat function - heating or cooling) based on the temperature measured by the built-in or external temperature sensor.

The controller can protect the heat exchanger of the heat recovery system against freezing . Based on the temperature measured by an external sensor located at the outlet of the polluted air from the exchanger, relay R enables the switching off of the fresh air supply fan in order to defrost the exchanger with polluted air or to switch on the preheating.

The controller also has a contact that, when short-circuited, starts the BOOST function - one-time ventilation. This allows you to control the heat recovery system from a remote location (WC, bathroom, kitchen, etc.) for the purpose of quick ventilation. There are 3 modes to choose from. And it can be started either by simply pressing a button or with a suitable additional sensor, e.g. humidity, etc.

FEATURES

Large, backlit LCD display that displays the current fan speed, the temperature of the integrated and additional temperature sensor, the set mode, date and time, and other information.

• 6 selectable fan speeds, each level individually adjustable within the entire control voltage range of 0-10 V

• Input for connecting a warning signal. If a short circuit occurs, an acoustic signal sounds and a message appears on the screen.

• Monitoring the time for filter replacement (word FILTER, sound signal).

• Easy, intuitive control and programming

• DC 6-29V power supply with backup battery (control settings retained)

• Programming of ventilation intensity in a weekly cycle, 4 time periods each day (setting with an accuracy of 1 minute)

• Manual or automatic mode

TECHNICAL DATA

• Consumption: < 2W

• Number of performance levels: 6

• Temperature display: -20 ÷ 140 °C, adjustable in 0.1 °C increments

• Temperature measurement accuracy: 1 °C

• Power supply: DC 6 - 29V

• Current: 0.1A

• Output signal: 0-10V DC

• Inputs: 2x

• Relay output: 1x 1A 250V AC

• Cover: ABS

• Display: LCD (3.2")

• Protection class: IP30

DELIVERY CONTENTS

• 1x main control panel - LCD
• 1x relay connection module

External temperature sensor not included (can be ordered separately)

EXPLANATION OF DISPLAY PICTOGRAMS

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DIMENSIONS

CONTROLLER CONNECTION EXAMPLES

1./ PROTECTION AGAINST FREEZE OF THE HEAT EXHAUST UNIT - DISCONNECTING THE SUPPLY FAN

The controller in this connection is used to regulate a heat recovery system equipped with a supply and exhaust fan controlled by a 0-10V signal.

An external temperature sensor connected to IN2, physically located at the exhaust air outlet from the heat exchanger, indicates a temperature of e.g. 1°C and then the controller stops the supply fan. In this state, the warm air from the exhaust fan defrosts the heat exchanger with warm exhaust air.

2./ FREEZE PROTECTION OF THE HEAT EXHAUST UNIT - SWITCHING ON THE PREHEATING

The controller in this connection is used to regulate a heat recovery system equipped with a supply and exhaust fan controlled by a 0-10V signal.
An external temperature sensor connected to IN2, physically located at the exhaust air outlet from the heat exchanger, indicates a temperature of e.g. 1°C and then the controller starts the electric preheater located in the fresh air supply pipe in front of the heat exchanger.
Subsequently, the heated air defrosts the heat exchanger and the electric preheating is switched off (when the set temperature is reached - in this case at 3°C).

3./ AUTOMATIC BY-PASS CONTROL