NEXA AB, DATAVÄGEN 37B, SE-436 32 ASKIM, SWEDEN
info@nexa.se | www.nexa.se
SAFETY AND INFORMATION
Range indoors: up to 30 m (optimal conditions). The range is
very dependent on the local conditions, for example, if there are
metals in the vicinity. For example, the thin metal coating in energy
glass with low emissivity has a negative influence on the range
of the radio signals. There may be restrictions on the use of the
unit outside the EU. If appropriate, you should check that the unit
complies with local regulations.
Life-support equipment: Never use Nexa products for life-support
equipment or other devices where faults or interference could have
life-threatening consequences.
Interference: All wireless units can suffer from interference that can
affect the performance and range. For this reason, the minimum
distance between two receivers should be at least 50 cm
Repair: Do not attempt to repair the product. It does not contain
any repairable parts.
Waterproofing: The product is not waterproof. Make sure it is dry
at all times. Damp causes the electronics inside to corrode and this
could lead to short-circuiting, faults and a risk for electric shocks.
Cleaning: Clean the product with a dry cloth. Do not use chemicals,
solvents or strong cleaning agents.
Environment: Do not expose the product to intense heat or cold,
because it could damage or shorten the service life of the electric
circuits.
ZRT-106 is a Z-Wave Plus thermostat that automatically adjusts the
temperature in a water radiator for optimum heating. With the ZRT-106,
the room temperature can be easily monitored and controlled with a
Nexa Bridge or any other control device with Z-Wave certification.
Z-Wave Plus technology ensures secure communication between
devices.
SAFETY
Read through the entire instruction first. Engage a professional if so
required. Nexa cannot be held liable if the product is used for any
purpose other than the one for which it is designed, or if there is
failure to comply with the instruction.
The product contains no repairable parts.
INSTALLATION
Do not insert the batteries yet.
1. Remove the existing valve or thermostat from the radiator valve.
2. Fit the ZRT-106 onto the valve and then tighten it by turning
the ring clockwise. You may need to use one of the adapters
supplied to fit your radiator valve.
3. The ZRT-106 can be installed in various directions as shown
below. Note: Free air flow is needed to record the temperature.
Avoid blocking the circulation of air around the thermostat.
CONNECT TO A Z-WAVE NETWORK
The ZRT-106 supports the SmartStart function, inclusion starts
automatically when the device is started and is repeated at dynamic
intervals as long as the device is not included in a Z-Wave network.
If a gateway does not support the SmartStart function, this device
can be added to a Z-Wave network by means of manual inclusion,
or by scanning the DSK QR code or entering a 5-digit Device
Specific Key (DSK) at the request of the Z-Wave controller.
Auto inclusion:
1. Put the Z-Wave controller in inclusion mode (see the manual for
the controller)
2. Fit batteries in the ZRT-106
Manual inclusion:
1. Put the Z-Wave controller in inclusion mode (see the controller's
manual)
2. Fit batteries in the ZRT-106
3. Press the button 3 times within 1.5 seconds. P
Exclusion:
1. Put the Z-Wave controller in exclusion mode (see the controller's
manual)
2. Press the button 3 times within 1.5 seconds.P
Calibration
1. The device will initialise itself when inclusion is complete. During
this time, the LCD display will show INIL with the background
lighting flashing for 2 minutes.
2. When the ZRT-106 shows AdAP, press the UP button to start
calibration. The figure 0 will change to 1. Press the UP button
again if it does not change to 1.
3. The ZRT-106 will adapt to the regulating range of the valve by
opening and closing the valve twice in order to store the end
position settings. This may take up to 1 minute.
4. Calibration is complete when the temperature readings are
shown on the LCD display.
Note: The temperature readings will be correct approx. 10 minutes
after installing the batteries.
OPERATION
1. Automatic temperature adjustment, Normal and Night Reduction.
The operating mode is selected by pressing the M button and
indicated in the display by means of for Normal and for
Night Reduction.
The setpoints for these two operating modes are set using the
Z-Wave controller. The thermostat will activate the heating when the
room temperature is below the relevant setpoint.
2. Schedule or scenario function.
The Z-Wave controller can automatically switch between operating
modes on the basis of time, presence, etc. See the operating
instructions for the controller.
3. Manual temperature setting.
Preset setpoints can be disregarded temporarily by pressing the M
button first and then adjusting the temperature using the Up/Down
buttons. The ZRT-106 returns to its previous operating mode with
preset setpoints after 4 hours. (Factory setting, can be altered with
parameter 10 in the Z-Wave configuration)
4. Airing mode.
When Airing mode is enabled, the ZRT-106 will automatically
close the radiator valve when it detects a sudden drop in room
temperature (default: 2°C in 15 minutes) and the display shows OP.
The ZRT-106 returns to the previous operating mode after 30
minutes or when any button is pressed. (Factory setting, can be
altered with parameters 6-9 in the Z-Wave configuration)
5. Key lock.
Lock/unlock by holding down the P and M buttons for 5 seconds,
locked buttons are indicated by means of in the display.
6. On/Off.
In Off mode, thermostat control is disabled and the display just
shows the time and day. Note that this does not switch off the
device itself.
Calibration
MAINTENANCE
Low battery. When the battery level is low, information is sent to
the controller in order to alert the user. Replace the batteries as
soon as possible
Decalc. When the ZRT-106 is inactive for long periods, e.g. during
the summer, it automatically exercises the valve once a fortnight.
This helps to prevent the radiator pipes becoming blocked and the
valve seizing on account of limescale, etc.
EXTENDED Z-WAVE CONFIGURATION
Can be found under the product at www.nexa.se
Button Function
1 P Inclusion/exclusion in a Z-Wave network
2 On/Off
3 M Temperature adjustment, Normal / Night Re-
duction
4Arrow
Down Reduce the set room temperature
5 Arrow Up Increase the set room temperature
123
4 5
Time
LCD display
Battery cover
Radiator connection
Day
Temperature
Status
