FH-RT Wireless Room Thermostat
FH-BU Wireless Base Unit
Installation & Operating Instructions
Specification
Base unit (230 V) |
|
Order Code: |
088H011901 |
Primary voltage: |
230 V a.c. |
Secondary voltage: |
230 V a.c. |
Outputs 1-6: |
230 V a.c., 1 A max., relay |
|
controlled |
Outputs 7-8: |
8 A, 230 V a.c./50 Hz, relay |
|
controlled, convertible to |
|
volt-free outputs |
Max. no. of thermostats: |
8 (wireless) |
Max. no. of thermal actuators: |
20 |
Max. no. of thermal actuators |
|
per output: |
4 |
Output 8 run-on time: |
10 min |
Thermal actuator & pump exercise |
Once daily (approx. every 24 |
|
hours after connecting the |
|
power supply for the first |
|
time) |
Settings after power failure: |
User settings are retained |
Enclosure: |
IP20 |
Dimensions [mm] |
310 x 110 x 55 |
Ambient temperature: |
0-50°C |
Humidity: |
Less than 85% |
Thermostat |
|
Order Code: |
088H012100 |
Temperature scale: |
6-30°C +/- 2K |
Hysteresis: |
+/- 0.5°C |
Scale accuracy: |
2K around set point |
Night set-back: |
4K at 20°C |
Frequency: |
433.70 MHz |
Battery life: |
Min. 5 years |
Battery type: |
3.6 V lithium battery, 2100 |
|
mAh, size AA |
Transmission range: |
Up to 30 m (radius) |
Transmission interval: |
2-30 min |
Ambient temperature: |
0-50°C |
Humidity: |
Less than 90% |
|
|
Power |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
Mode OK
20
10 |
30 |
System Schematic
1
These installation and operating instructions describe system function and technical data.
The system is a complete floor heating control system for individual rooms in dwellings, offices, institutions, business premises, etc.
The system is based on data transfer via radio, and is therefore quick and easy to install.
The system was developed to meet requirements for comfort, heat economy, flexibility and user-friendly operation.
Power |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
Mode OK
20
10 |
30 |
Fig. 1. The system consists of a base unit, thermostat and, if necessary, an external aerial.
2.0 Operating principle
The system consists of two unit types: base unit and thermostat.
The base unit is connected to a 230 V supply and through eight outputs controls the thermal actuators that regulate the flow of hot water to the individual rooms. The system can also control circulation pump and boiler. The base unit is centrally located in the dwelling adjacent to the distribution manifold.
2.1 Base unit
The base unit is the system interface. It consists of a control panel, radio receiver and alarm.
If faults occur in the wireless data transfer, the base unit raises an alarm in order to make users aware of the fault.The alarm also informs the user when a thermostat requires a new battery. The receiver in the base unit continuously scans the radio signals it receives from installed thermostats.
The base unit is usually installed about 1.5 metres above the floor in order to make the control panel easily accessible. Installation at this height also enhances the radio signal range of the system.
2.2 Thermostat
Up to eight thermostats can be connected to the system. One thermostat can be used to control several thermal actuators. Thermostats are positioned at suitable locations in rooms where temperature control is required. Thermostats have a knob for setting the desired temperature and a switch for selecting one of three programs (day, timer control and night).
Each thermostat contains a small battery that supplies current to an electronic temperature measuring circuit with associated radio transmitter. At suitable intervals the measured temperature is sent as a radio signal to the radio receiver in the base unit. If the temperature is changed the thermostat will transmit the new temperature after the suitable interval. For transmission test please see section on Transmission Testing, or Thermostat Test Mode. Thermostats have no external cable connections.
Each thermostat has a unique identification (ID) number that is sent with every transmission. The base unit uses these ID numbers to distinguish the various thermostats. Thermostats must therefore be registered in the base unit before the unit is able to receive data from the thermostats. During registration, thermostats transfer their ID numbers to the base unit. The use of ID numbers also prevents the base unit from reacting to signals received from neighbouring systems or other systems based on radio technology.
Thermostats are battery powered and thus fully mobile, making it easy to re-configure the system if required.
The system is CE marked and approved for use in all EU and former EFTA countries.
The actual temperature is measured by the thermostat. When the actual temperature is lower than the set temperature, a command for heat is sent to the base unit.
Temperature can be set between 6°C and 30°C. A function switch on the thermostat allows day, timer control or night to be selected. The day setting allows normal operation, the timer setting allows time-controlled night setback to be used, and the night setting permanently lowers the temperature setting by 4°C.
Thermostats are supplied with pre-installed batteries. Before being taken into use, thermostats are “dormant”and only begin measuring temperature and transmitting data on being registered in the base unit for the first time. The purpose of this dormant state is to minimise energy use during storage and to avoid unnecessary radio transmission.
On being installed for the first time, thermostats automatically enter test mode so that transmission can be tested immediately.
Battery life is guaranteed by the manufacturer to be at least 5 years.
A complete system is illustrated above in Fig. 1.
2.3 Aerial
Normally, the base unit uses a built-in aerial.
The location of the base unit is therefore important for the range, which can be increased by equipping the base unit with an external aerial.
An external aerial must be used if the base unit is located in a metal cabinet.
2
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