General

Thank you for choosing Fumis SweetSpot sensor by ATech elektronika d.o.o.

The SweetSpot wireless temperature sensor measures air temperature at its specific location and sends this data to your heating appliance. This way your heating appliance modulates its power according to the temperature at your chosen location.

ATTENTION:

• Fumis SweetSpot sensor only works with heating appliances that use Fumis user interfaces with integrated wireless connectivity or have SweetSpot receiver module installed.
• Before installing check if SweetSpot sensor is close enough for a heating appliance to receive its wireless signal.

This manual consists of basic instructions for installing and operating the Fumis SweetSpot sensor. It does not contain the operating instructions for your heating appliance or the installation instructions for the SweetSpot receiver module.

Warnings

Installation:

Attention! Fumis SweetSpot receiver module can be installed only by trained personnel authorized by the manufacturer of your heating appliance. Any modifications to your heating appliance could lead to a warranty loss. We advise you to contact the manufacturer of your heating device or the person who installed it.

ATech elektronika d.o.o. is not liable for any damages or injuries resulting from improper use or installation of the Fumis SweetSpot sensor or the SweetSpot receiver module. In addition, ATech elektronika d.o.o. is not liable for any warranty loss due to the installation or modification of your heating device by an unauthorized person or the user himself.

Exposure to liquids:

Do not expose the product to water, cleaning agents, solvents, or any other liquids as it may damage the electronics, cause malfunctions or failure and become a life-threatening hazard.

When using the product, avoid the possibility of water or other liquids coming in contact with the electronics. Any contact with water or other liquids may damage the electronics, cause malfunctions or failure and become a life-threatening hazard.

Recommendations

Cleaning:

The Fumis SweetSpot sesnor does not require special cleaning. However, if cleaning use a dry cloth to gently wipe the module.

Servicing:

The Fumis SweetSpot sensor has been designed for long-life operation and does not require special maintenance (except replacing the batteries). However, in the case of malfunctions, ATech elektronika d.o.o. strongly recommends that you contact the authorized technician for your heating appliance or the person who installed it.

Warranty and general conditions

ATech elektronika d.o.o. guarantees products against errors in material and workmanship for 1 year after delivery (with original receipt). The warranty period starts on the day of delivery and is conditioned by the professional installation and proper use of the product, as described in this guide.

ATech elektronika d.o.o. reserves the right to apply technical modifications without prior notice.

ATech elektronika d.o.o. is not liable for malfunction and injuries that are a consequence of: external, chemical, and physical influences during transport, storage, installation, and use of Fumis products (for example, but not limited to: water leakage, exposure of the electronics to steam, exhaust fumes, ash, and temperatures outside the specified range).

Technical characteristics

• Temperature range: -20 °C to 60 °C (storage and use)
• Humidity: max 95 % (non-condensing)
• Wireless protocol: RF 2.4 GHz
• Signal range (outdoor/indoor): 40 m / 20 m
• Dimensions: 84 x 28 mm
• Weight: 100 g
• Battery: 2x AAA batteries (included)
• Battery life: Up to 1 year
• Temperature measurement range and accuracy: -40 to 85 °C, +/- 1 °C
• *Humidity measurement range and accuracy: 0 to 100 %RH, +/- 3 %RH
• *Pressure measurement range and accuracy: 300 to 1200 mbar, +/- 2 mbar
• Mounting position: Horizontal or vertical
• Protection class: IP22

*Available only with SweetSpot 3in1

Use

Installation

Before installation, please check that you have received all the necessary parts (picture below):

• 1x housing top part
• 1x housing bottom part
• 1x sensor board
• 2x AAA non rechargeable batteries
• 1x mounting screw
• 3x self-adhesive transparent rubber feet pads

The SweetSpot sensor can be connected to Fumis interfaces (displays) with integrated wireless connectivity or to the Fumis SweetSpot receiver module.

The SweetSpot sensor can be mounted horizontally (on a flat surface). Please use the included self-adhesive rubber pads. Vertical (wall) installation is also possible with the use of an included screw and the keyhole cutout on the bottom housing.

Pairing

Fumis user interfaces (with wireless connectivity)

This procedure applies to the Fumis Premium XL display. If you are using the Fumis Alpha UI display, please follow the instructions described in the user manual you received with your heating appliance.

1. Open the SweetSpot sensor housing by turning the top lid clockwise. Insert batteries into the sensor board while paying attention to the correct polarity. A moment after inserting batteries the integrated LED light should flash once in white color.
2. On Premium XL display: enter settings menu -> external devices -> add device -> click Connect.
3. On the SweetSpot sensor board press the button marked with number 1. The integrated LED light should be flashing in green for approximately 30 seconds, or until the connection is established.
4. When the connection is established, the data will be shown on the Premium XL display. The LED light on the SweetSpot sensor will also stop flashing and will blink once every 3 minutes to indicate normal operation.
5. You can now close the SweetSpot sensor housing by turning the top lid counterclockwise.

Fumis SweetSpot receiver module

1. Open the SweetSpot sensor housing by turning the top lid clockwise. Insert batteries into the sensor board while paying attention to the correct polarity. A moment after inserting batteries the integrated LED light should flash once in white color.
2. On the SweetSpot receiver module, the green light should be flashing slowly (if connected correctly to your heating appliance). Press the button on the SweetSpot receiver module. The green light will start to flash rapidly.
3. On the SweetSpot sensor board press the button marked with number 1. The integrated LED light should be flashing in green for approximately 30 seconds, or until the connection is established.
4. When the connection is established, the green light on the receiver module will stay lit. The LED light on the SweetSpot sensor will also stop flashing and will blink once every 3 minutes to indicate normal operation.
5. You can now close the SweetSpot sensor housing by turning the top lid counterclockwise.

Unpairing

Fumis user interfaces (with wireless connectivity)

On Premium XL display: enter settings menu -> external devices -> select a device -> click Disconnect.

Fumis SweetSpot receiver module

Press and hold the button on the SweetSpot receiver module for approx. 10 seconds until both LED lights (green and red) turn steady on. Release the button.

LED light color change

The color of the LED light that indicates normal operation (1 blink every 3 minutes) can be changed or disabled entirely (OFF option):

1. Open the SweetSpot sensor by turning its housing clockwise to access the sensor board.
2. Hold the button marked with the number 1.
3. The LED will start to cycle through the available colors and also an OFF option (indicated with the fast flashing white).
4. You select the desired color (or OFF option) by releasing the button at the time when the desired color is shown.
5. Close the housing by turning it counterclockwise.

LED color codes

SweetSpot sensor

SweetSpot receiver

Troubleshooting

SweetSpot sensor

SweetSpot receiver