CO2 RF - Thermostat ZEHNDER - Free user manual and instructions

Product type	CO₂ ventilation regulator with thermostat
Brand	Zehnder
Model	CO2 RF
Supply voltage	230 V ± 10 %, single phase, 50 Hz
Power consumption	Typical < 1 W
Minimum ambient temperature	-10 °C
Maximum ambient temperature	+40 °C
Air humidity (continuous)	85 % without condensation
CO₂ measurement range	400 - 2000 ppm
Sensor fault	Measured value < 300 ppm or > 10000 ppm
CO₂ target value	1050 ppm
Output signal	0-100 % RF, proportional
Protection class	II (EN60730-1)
IP protection rating	IP30 (EN60529-1)
Regulator type	RS type 1
Ventilation modes	4 positions: Absent, Present, Maximum, Auto CO₂
CO₂ LED indicators	Green (< 1200 ppm), Orange (1200-1500 ppm), Red (> 1500 ppm)
Connection	Wireless RF with the ventilation unit
Installation	Flush mounting in standard box
Extension sensor	Optional, CO₂ measurement only
Warranty	24 months after installation, 30 months after manufacture
Maintenance	Cleaning of air slots if necessary
Safety	Disconnect before intervention; protection against electrostatic discharges

Frequently Asked Questions - CO2 RF ZEHNDER

How to install the CO₂ RF main controller?

Separate the sensor part from the transmitter part by pushing the tabs downwards with a screwdriver. Mount the transmitter part in a flush-mounted box and connect it to 230 V. Put the sensor part back in place, ensuring air can circulate through the slots.

How to connect the sensor to the ventilation unit?

Make sure the RF input of the unit is set to proportional control. Disconnect the unit, wait 5 seconds, then reconnect it (programming mode). On the main controller, press the button for 8 seconds until the LEDs flash.

What to do if the red LED flashes on the main controller?

This means the connection with the ventilation unit is not established. Repeat the connection procedure. Check the distance (too large) and metal obstacles between the devices.

How to clean the CO₂ sensor?

Use a soft cloth to remove dust from the air slots of the housing. No special maintenance is required, but soiling can disrupt operation.

What do the LED indicator colors mean?

Green: CO₂ < 1200 ppm (good). Orange: between 1200 and 1500 ppm (average). Red: > 1500 ppm (bad, ventilate the room).

How to change the ventilation mode?

Press the button on the main controller to choose between Absent, Present, Maximum or Auto CO₂. The position is indicated by a blue LED.

Where to install the extension sensors?

Install them in bedrooms, not in landings, hallways, toilets or bathrooms. They measure CO₂ and the ventilation rate is determined by the highest level.

What is the product warranty?

Zehnder grants a warranty of 24 months after installation and 30 months after the date of manufacture. It is voided in case of non-compliant installation or use of unauthorized parts.

Can I use the CO₂ detector as a gas safety device?

No, the detector must not be used as a gas regulation safety device. Its application is only permitted in living spaces.

What to do in case of sensor fault (green/orange/red LEDs flashing)?

The sensor is defective or heavily soiled. Clean it first. If the flashing persists, replace the sensor. In degraded mode, the 3-position switch still works.

USER MANUAL CO2 RF ZEHNDER

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CO2RF main control unit

CO2RF main control unit;
■ User manual (sticker on CO₂ RF main control unit);
Fitter's manual.

Note: Zehnder - J.E. StorkAir attaches great importance to good user information. There is a sticker on the main control unit with a manual for the user. Please do not remove or open this.

CO_2 RF upgrade sensor

CO2RF upgrade sensor;
Fitter's manual.

Introduction

This manual is intended for fitters who will install and perform maintenance on the CO2 RF main control unit and/or the CO2 RF upgrade sensor. This manual has been compiled with the greatest care. However, no rights can be derived from it. Zehnder - J.E. StorkAir also retains all rights to change the contents of this manual without prior notification.

Warranty and liability

Zehnder - J.E. StorkAir provides a 24 month warranty following installation and 30 months as of the production date. The warranty period commences on the date of purchase. The warranty becomes invalid if:

■ Installation has not been carried out according to the applicable regulations;
The defects are due to incorrect connection, inexpert use, or contamination of the system;
Parts have been used which have not been supplied by the manufacturer or repairs have been carried out by unauthorized personnel.

On-site (dis)assembly costs are not covered by the terms of the warranty. This also applies to normal wear and tear. Zehnder - J.E. StorkAir retains the right to change the construction and/or configuration of its products at any time without being obliged to alter previously delivered products.

Summary and principle

The ventilation system comprises a ventilation unit with RF function and a CO2 RF main control unit, which have a wireless connection. CO2 RF upgrade sensors can be added. The main control unit can be used to select between CO_2 -controlled ventilation or traditional 3-position switch control. The main control unit should be fitted in the living room. The upgrade sensors should be fitted in the bedrooms. The sensors are not intended for fitting on landings, hallways, toilets or bathrooms.

The sensors and the ventilation system must be aligned before remote control of the system is possible. The procedure will be described in detail elsewhere in this manual.

Electrical dangers

There is a risk of electric shock during installation or maintenance.

Always comply with safety regulations in this

manual. If the safety regulations, warnings, comments and instructions are not complied with, this can lead to personal injury or damage to the product.

Disconnect the electrical group to which the main control unit or upgrade sensor is connected, before opening the cover of the device.

Electrostatic discharge (ESD)

There is a risk that PCBs may be damaged by an electrostatic discharge if electrical components have to be exchanged. For this reason, always take ESD-inhibiting measures when dealing with PCBs, such as wearing an antistatic wristband.

Do not use the CO_2 sensor for safety-related control of the gas supply, as it is intended only for use in living areas.

The CO_2 sensor can be disrupted by other RF transmitters.

Installation

Installation

The CO2 RF main control unit and the CO2 RF upgrade sensor are constructed from a sensor section (the front) and a transmitter section (the rear).

B

A

The transmitter section has been designed for mounting on a flush socket. The sensor section must be separated from the transmitter section in order to mount the devices on the wall and to electrically connect them. To do so, use a small screwdriver to press the 2 click fingers (B) in the air channels on the top of the device down

wards slightly and pull the sensor section upwards.

Note: When putting back the sensor, the 4 pins (A) of the electrical connect fall into the contacts of the transmitter. Ensure that the regulator is put back in a that allows the air to move freely through channels. When selecting the position, there are no large metal obstacles between ventilation unit and the CO2 sensor. Diant heat or warm supply air must also be The recommended position for the CO2

RF main control unit is next to the thermostat or light switch in the living room. The upgrade sensors should be fitted in the bedrooms.

Electrical connections

The CO2 sensors must be connected in conformance with locally prevailing procedures. The CO2 sensor transmitter section is connected to the 230V / 50Hz grid via a flush socket. Push the cables through the rear of the casing. Securely screw the transmitter section to the flush socket.

Connection between the ventilation unit and the CO_2 sensors

The following steps must be carried out to make a connection between the ventilation unit and the CO_2 sensors:

Ventilation unit

Ensure that the RF input of the ventilation unit is set to "proportional control". Consult the fitter's manual for the ventilation unit for more information.

1. Remove the ventilation unit plug from the socket and replace after 5 seconds. The device is now in programming mode. A connection can be made with the main control unit within 10 minutes.

CO, RF main control unit

1. Press the button on the CO_2 RF main control unit for approximately 8 seconds. The sensor will now establish a connection with the ventilation unit. The green, orange and red LEDs flash to confirm that the communication has been established.

CO, RF upgrade sensor

1. Repeat step 1. Use a pointed object (paperclip or pen) to press the button on the upgrade sensor until the green, orange and red LEDs flash (approximately 8 seconds).
2. Repeat step 3 until all upgrade sensors are connected.

Connection problems

The following problems may occur when connecting the sensors or accessories:

The red LED on the CO2 RF main control unit flashes. No connection has been established with the ventilation unit. Repeat step 1 and 2. If this is ineffective, check that the distance between the ventilation unit and the sensor is not too large and that the communication is not impeded by large metal obstacles;
The red LED on the CO2 RF upgrade sensor flashes. No connection has been established between the CO2 RF upgrade sensor and the ventilation unit, or the CO2 RF main control unit is not connected. Check that the CO_2 RF main control unit is working properly. Then repeat step 3.

Operation

Users can select one of 4 ventilation settings using the button on the main control unit: absent, present, maximum or "Auto CO2 ". The setting selected is indicated by a blue LED. The ventilation is automatically controlled in the "Auto CO2 " setting based on the CO2 concentration. When only the main control unit is used, this relates exclusively to the CO2 levels in the living room. If the upgrade sensors are also used, then this highest CO2 concentration is normative for the ventilation volume. The upgrade sensor does not function as a control unit and is only intended to monitor CO2 levels in a living area. There are 3 LED indicators on the sensors which display the CO_2 levels:

Green (<1200ppm);
Orange (1200 - 1500ppm);
Red (>1500ppm)

Residents are advised to open a door or window if the red LED lights up. Furthermore all gaps under doors - which are essential for effective ventilation - as well as the position of window gratings (if fitted) must be checked.

Malfunction

The following malfunctions can occur:

The green, orange and red LEDs flash. The 3-position switch on the main control unit still works. The CO2 sensor is defective or seriously contaminated. Clean the CO2 sensor or replace it;
The red LED flashes, while the green or orange LED is constantly illuminated. The sensor cannot establish a connection with the ventilation unit. Check the distance and for the presence of any large metal obstacles between sensor and ventilation unit.

Maintenance

The CO_2 sensors are maintenance-free throughout the entire lifespan. The operation can be interrupted by contamination of the air channels. Remove the dust from the casing and from the air channels where required.

Specifications

CO2 RF main control unit and CO2 RF upgrade sensor

Power supply: 230V ± 10% , single-phase, 50Hz;
Minimum ambient temperature: -10^
Maximum ambient temperature: +40^
Humidity (continued): 85% (electronics), non-condensing;
Functional measurement range 400ppm - 2000ppm;
Sensor malfunction if measurement value is < 300ppm or >10000ppm ;
Target value 1050ppm;
Output signal 0% RF - 100% RF ,proportional; integrating subject to target value deviation;
Unit consumption: typically < 1W
Degree of pollution: 2;
Peak voltage: 4kV
Protection class: II in compliance with EN60730-1;
IP classification: IP30 in compliance with EN60529-1;
Type of regulator: RS type 1.

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