Installation Instructions; Technical Data - Mi-Heat Heizsysteme Mi-300S Rf Installationsanleitung

ENGLISH
Mi-Heat Heizsysteme GmbH | Ol Streek 39a | 26607 Aurich | Germany
Phone: +49 (0) 4941-6971930 | Web: mi-heat.de | Mail: info@infrarot-fussboden.de

INSTALLATION INSTRUCTIONS

Mi-250S RF radio thermostat set
Field of application
The Mi-250S RF is a radio room thermostat and consists of a battery-
operated transmitter (2x AAA batteries) and a mains-powered
receiver (230V / 50Hz). The device is designed for convenient and
economical heating operation and can control the central heating
boiler, electric heaters or other consumers with a maximum switching
capacity of 7A / 1610W. Almost all consumers can be switched via the
potential-free switching contact. The temperature is monitored via
the integrated sensor on the radio transmitter. The radio range is up to
20 metres in the building (approx. 50m free field range).
Safety instructions and measures
Please read these operating instructions carefully before using the

product for the first time.
Use the product strictly as intended, as described in the operating

instructions.
To avoid electric shock, never immerse the appliance in water or

other liquids and ensure that no water drips onto it.
Make sure that the mains voltage in your home corresponds to the

operating voltage specified on the rating plate.
The electrical connection may only be carried out by qualified

specialists in accordance with the applicable electrical safety
regulations.
This appliance is not intended for use by persons (including

children) with reduced physical, sensory or mental capabilities, or
lack of experience and/or knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a
person responsible for their safety.
Children should be supervised to ensure that they do not play with

the appliance.
Properties
Calibration of the temperature sensor

ON/OFF control

Wireless connection

Heating/cooling option

TPI algorithm

Precise temperature measurement

Expandable to 3 receivers

1
Scope of delivery
Table stand
Thermostat /
transmitter unit
Receiver unit Mounting material

TECHNICAL DATA

Thermostat (transmitter)
Dimensions (WxHxD) 125x85x24mm
Power supply 3V DC (2 x AAA battery)
Temperature measurement accuracy +/- 0.5°C
Temperature display 0.1°C Steps
Temperature setting 5- 30°C (0.5°C Steps)
Operating temperature range +5 to 30°C
Battery life 1 Year (2 x AAA)
Operating temperature -10 to + 50°C
Storage temperature -20 to + 60°C
Operating frequency 433 Mhz
IP protection class IP21
Receiver
Dimensions (WxHxD) 90x90x25mm
Power supply 230V AC / 50Hz
Max. Switching capacity Relay 7A (230V/AC - resistive load)
Bearing temperature -20 bis + 60°C
Frequency 433 Mhz
IP protection class IP20
Description of the device display/buttons (thermostat/transmitter)
1
2
3
4
5
6
1 Battery display
2 Room temperature
3 Set temperature
Cooling mode
4 If the symbol flashes, the cooling appliance is in operation. If the
symbol is constantly lit, the cooling appliance is not in operation.
Heating mode
5 If the symbol flashes, the heating is in operation. If the symbol is
constantly lit, the heating is not in operation.
6 Press button = ON/OFF / Turn button to set the temperature
Description of the device buttons (receiver)
1-Manual operation button: deactivates the
receiver and enables manual operation of
1
the connected consumer
2
2: Pairing button: for pairing the
3
thermostat/transmitter and the receiver
3: LED light: operating indicator
4: Power cable input
5: Output for the consumer's connection
cable
4 5
2
Description of the receiver LED
Batteries
Always red Receiver is ready for operation, but receiver and
thermostat/ transmitter are not paired.
Flashing green Waits for the coupling signal from the thermostat/
transmitter.
Always green Receiver and thermostat/transmitter are coupled.
The consumer is not in operation.
3x short orange Actuation that the signal from the thermostat/
flashes (or green and transmitter has reached the receiver.
red at the same time)
Always orange (or Consumer is switched on
green and red at the
same time)
3x short flashes green Actuation that the signal to switch off the load has
reached the receiver
Flashes orange (or The appliance is operated in manual mode
green and red at the
same time)
Flashing Red The receiver has not received a signal from the
thermostat/transmitter for at least 22 minutes.
The consumer is switched off.
Mounting position of the thermostat (transmitter)
The thermostat/transmitter should not be installed/placed where there is
excessive air circulation (e.g. at the room entrance or next to the window).
Installation locations in the direct vicinity of heating/cooling devices
(radiators, oven, air conditioning unit) or in areas exposed to direct sunlight
are also not suitable. The thermostat/transmitter must be installed approx.
1.5 metres above the floor.
Thermostat table stand
Inserting / changing the batteries
Rear of the thermostat front unit
Opening the thermostat housing
Open the housing:
Use a screwdriver to press forwards on the recesses (left and right) on the
underside of the room thermostat (see picture above). The front part of the
thermostat can now be removed from the mounting plate.
Insert batteries:
Insert 2 AAA alkaline batteries into the battery compartment, observing the
direction of the batteries. If the batteries need to be replaced, always replace
both batteries at the same time.
Close the housing:
To close the device again, reinsert the front part at the top of the hook on the
mounting plate and then press the front part lightly at the bottom until it
clicks into place.
Battery warning in the display:
If the "LB" symbol appears on the thermostat display, the batteries should be
replaced promptly.
3
Notes:
If the device is not used for a longer period of time (more than 15 days), we
recommend removing the batteries.
Dispose of batteries in the designated waste container for batteries.
Mounting position of the receiver
The following points must be observed when positioning the receiver
reception of signals is not impaired. The following points must be
observed:
The devices should not be mounted on metal surfaces.

The devices should not be installed near electrical cables and electronic

devices such as computers and televisions.
The devices should not be installed near large metal structures or other

building materials with fine metal mesh such as special glass or special
concrete.
The distance between the room thermostat and the receiver should not

exceed 20 metres or 2 storeys.
Connection of the thermostat:
Attention: Work on the electrical installation may only be carried out by
professionally qualified persons!
First switch off the load to be connected and the incoming power source!
min. 20 cm
The thermostat set can be used for various applications, as the thermostat
has a potential-free switching output. Depending on the type of supply or
control required, connect the consumer to the receiver (see connection
diagram (application examples)).
Once the consumer has been connected, the consumer can be switched on
as a test by pressing the manual operation button on the receiver for 2
seconds. The LED on the receiver flashes when the consumer is switched
on. Once you have made sure that the load is in operation, switch it off again
by pressing the button again (2 seconds).
Description of the connection terminals
The receiver has a potential-free output relay which can be used to switch
voltages between 0 and 240V. The maximum switching power is 7A /
1610W.
Thermostat mounting plate
Connection diagram (application examples)
1.connection of an infrared heater, other electric heater or another 230V
consumer
Avoid physical contact between the receiver and the

connected load
The receiver must be protected from liquids,

moisture, dust, etc.
The devices (transmitter/receiver) should be

positioned in such a way that the transmission and
NC
COM
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