Gewiss GW21853 ELECTRONIC THERMOSTAT
Electronic thermostat for Fan-Coil
ATTENTION – IMPORTANT
- Congratulations for having choosing a Gewiss product. Gewiss products are constructed with careful attention to detail, using only high quality materials. Gewiss products assure you of peak performance over time.
- Carefully read the following instructions since they contain important information on installing and operating the product. The installer should give these instructions to the final user and ask him to read the contents.
- System programming products must be installed in conformity with the provisions of HD 384 – IEC364 regulations for devices for household or similar use in non-dusty rooms or where special protection against water penetration is not required.
- In case of failure and/or malfunction, contact an authorized technician\ or GEWISS SAT technical assistance service.
GENERAL PRODUCT DESCRIPTION
Functions
opEratINg Data
- Operating mode: thermostat-controlled solenoid valve and continuous fan operation, thermostat-controlled solenoid valve and fan operation, thermostat-controlled fan operation only and solenoid valve not connected
- Temperature setting block: mechanical with “range disk” (supplied)
- Indicator lights: load on/off LED
Technical Data
- Supply voltage: 230 V~ 50÷60 Hz
- Disconnection and appliance type: 1 B / Electronic
- Output type by control type:
- continuous fan operation polarized single-pole switch 5(2)A / 250 V
- solenoid valve (thermostat-controlled) polarized single-pole ON/OFF relay 5(2)A / 250 V~
- fan + solenoid valve relay + switch (thermostat-controlled) maximum total load 5(2)A / 250 V~
- Maximum terminal wire section: 2,5 mm2
- Insulation type: Class II e
- Protection class: IP 30
- Pollution: Normal
- Temperature control range: from +5°C to +30°C (limitable)
- Thermal gradient: max 1K/15 min.
- Control type: proportional band (width 1°C)
- Reading accuracy: ± 1°C
- Operating temperature range: 0°C to +50°C
- Reference standards for CE certification:
EMC EN55014-1 EN55014-2 EN61000-3-2 EN61000-3-3
LVD EN60730-1 EN60730-2-9
(Directive 89/336/EEC – 7323/EEC)
INSTALLATION INSTRUCTIONS
loCatIoN a DVICE
recommendations on positioning:
Install the thermostat at a height of from 1.50 to 1.70 m from the floor, far away from sources of heat, air ducts, doors or windows
Example of installation with the thermostat controlling the fan and solenoid valve.
Example of installation with the thermostat controlling only the fan.
N.B.: The examples shown in the following documentation are for illustration purposes only.
Electrical Connections
Important: electrical wiring installation of the devices and appliances should be carried out by qualified technicians in accordance with the regulations and laws in force. The manufacturer will not assume any responsibility for the use of products that must comply with special environmental and/or installation regulations; this obligation is the responsibility of and to charge of the installer.
Warning: before installing the product, disconnect the power supply.
Important: the thermostat control outputs are polarized; pay close attention to Line and Neutral connections.
Wiring: as indicated in the figure.
Disconnect the power supply (main breaker).
Connect the supply line to terminals n° 2 (Neutral) and n° 3 (Line).
Connect the fluid interception solenoid valve to terminal n° 4.
Based on the type of installation, connect the wires for speed control coming from the fan to terminals n° 5-6-7:
- terminal n° 5 – fan “High”
- terminal n° 6 – fan “Medium”
- terminal n° 7 – fan “Low”
N.B.:
- maximum load at fan terminals (5-6-7): 5(2) A 250 V~
- maximum load at valve terminal n° 4: 5(2) A 250 V~
- maximum total load with fan + valve: 5(2) A 250 V~
The setting wire must always be connected to terminal n° 3 or terminal n° 4. setting the fan-coil control mode
N.B.: the solenoid valve is always thermostat controlled.
- thermostat-controlled fan operation
Connect the wire that comes out of the first hole of the thermostat terminal board (hole 1) to terminal n° 4.
Wiring diagram for solenoid valve control and fan control with the thermostat-controlled operation
- Continuous fan operation
Connect the wire that comes out of the first hole of the thermostat terminal board (hole 1) to terminal n° 3.
OPERATING INSTRUCTIONS
CommaNDsaND s IgNals:
OPERATING mode
Based on the devices connected (fan and/or solenoid valve) and the terminal (n° 3 or n° 4) to which the wire for the fan operating mode setting is connected, the thermostat can operate in the following modes:
- thermostat-controlled solenoid valve and continuous fan operation (fig. a)
- thermostat-controlled solenoid valve and fan operation (fig. a)
- thermostat-controlled fan operation only and solenoid valve not connected (fig. B)
In all cases, 3 different fan speeds can be selected by a switch on the front panel.
Heating or cooling mode can also be selected by a switch on the front panel.
The thermostat operates with proportional temperature control, within a 1°C-band width, as shown in the figure.
Regulation is carried out by switching the load on and off for variable time intervals, depending on the difference between the temperature setpoint and the temperature reading.
References
Download Manual
Gewiss GW21853 ELECTRONIC THERMOSTAT Instruction Manual
