GW20853 - Thermostat Gewiss - Free user manual and instructions

Product type	Electronic thermostat for Fan-Coil
Brand	Gewiss
Model	GW20853
Supply voltage	230 V ~ 50/60 Hz
Temperature setting range	+5°C to +30°C (mechanically limitable)
Reading accuracy	± 1°C
Control type	Proportional band (amplitude 1°C)
Maximum temperature gradient	1 K / 15 min
Protection degree	IP30
Insulation class	Class II
Number of fan speeds	3 (Low, Medium, High)
Fan output maximum current	5(2) A ~ 250 V
Valve output maximum current	5(2) A ~ 250 V
Total maximum current	5(2) A ~ 250 V
Maximum conductor cross-section	2.5 mm²
Operating temperature	0°C to +50°C
Main functions	Heating/cooling, 3 fan modes (fixed, thermostatic, valve only)
Maintenance and cleaning	Clean with a dry cloth. Do not use solvents.
Safety	Cut off power before installation. Installation by qualified personnel.
Spare parts and reparability	Contact Gewiss after-sales service for any intervention.
General information	Compliant with standards HD 384 - IEC364. Weight and dimensions not communicated.

Frequently Asked Questions - GW20853 Gewiss

How to install the GW20853 thermostat?

Install the thermostat at 1.50-1.70 m from the floor, away from heat sources and drafts. Cut off power before connection. Connect the terminals: 2 (Neutral), 3 (Line), 4 (solenoid valve), 5-6-7 (fan speeds). The programming wire must be connected to terminal 3 or 4 depending on the desired mode.

What are the possible operating modes?

Three modes: 1) thermostatic solenoid valve and fixed ventilation, 2) thermostatic solenoid valve and ventilation, 3) only thermostatic ventilation (solenoid valve not connected). Selection is made via the internal terminal block.

How to adjust the temperature?

Turn the front knob to set the temperature between +5°C and +30°C. The control is proportional with a 1°C band. A setting disc (disco range) allows limiting the range.

How to select the fan speed?

Use the front switch to choose from 3 speeds: Low, Medium, High. The speeds are available regardless of the ventilation mode (fixed or thermostatic).

How to switch between heating and cooling?

Use the front switch to select heating or cooling mode. The thermostat then adapts the command of the solenoid valve and fan accordingly.

What is the load capacity of the outputs?

The maximum load for each fan output (terminals 5-6-7) and for the valve (terminal 4) is 5(2) A at 250 V~. The combined total fan + valve load must not exceed 5(2) A.

Can I use the thermostat without a solenoid valve?

Yes, in mode 3 (only thermostatic ventilation). Simply do not connect terminal 4 to the solenoid valve and program the control wire on terminal 3 or 4 depending on the desired ventilation type.

What to do in case of malfunction?

Contact an authorized technician or Gewiss technical support. Do not attempt to repair the device yourself.

What are the compliance standards?

The thermostat is compliant with EMC standards: EN55014-1, EN55014-2, EN61000-3-2, EN61000-3-3. It must be installed according to standard HD 384 - IEC364.

How to clean the thermostat?

Clean the device with a dry, soft cloth. Never use abrasive products or solvents. Ensure no moisture enters the inside.

USER MANUAL GW20853 Gewiss

TERMOSTATO ELETTRONICO PER FAN-COIL

ELECTRONIC THERMOSTAT FOR FAN-COIL
THERMOSTAT ÉLECTRONIQUE POUR FAN-COIL
TERMOSTATO ELECTRONICO PARA FAN-COIL
ELEKTRONISCHER THERMOSTAT FÜR FAN-COIL

C E

GW 20 853 - GW 21 853

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 - OEC364 regulations for devices for household or similar use in non-dusty rooms or where special protection against water penetration is not required.
• On case of failure and/or malfunction, contact an authorized technician or GEWÖSS SAT technical assistance service.

INNUX

page

GUNURAL PRONUÉT NUSERIPION

-yunctions 14

- INSTALLATION INSTRUMENTS

• location advice 15
  -x electrical connections 16

- OPÜRATING INSTRUÉTIONS

-Commands and signals 18
- operating mode 19

FUNÉTIONS

OPÜRATING NATA

• 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)
• Ondicator lights: load on/off aED

TÜÉUNIEAL NATA

Supply voltage: 230V 50÷ 60Hz
- 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
  ee/eFF relay 5(2)A / 250 V~

• fan + solenoid valve relay + switch (thermostat-controlled) maximum total load 5(2)A / 250 V~

• maxium terminal wire section: 2,5mm

• Onsulation type: Class ÖÖ
  -êrotection class:Öe 30
• éollution: éormal
• Temperature control range: from +5^ to +30^ (limitable)
• Thermal gradient: max 1 à/15 min.
• Control type: proportional band (width 1^ )
• Reading accuracy: ± 1°C
• operating temperature range: 0^ to +50^
• Reference standards for CE certification:

EcC Eé55014-1 Eé55014-2 Eé61000-3-2 Eé61000-3-3

äVD Eé60730-1 Eé60730-2-9

(Directive 89/336/EEC - 7323/EEC)

LOCATION ADVICE

OK

Recommendations on positioning:

Önstall the thermostat at a height of from 1.50 to 1.70m from the floor, far away from sources of heat, air ducts, doors or windows.

Example of installation with thermostat controlling the fan and solenoid valve.

Example of installation with 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 the charge of the installer.

Warning: before installing the product, disconnect the power supply.

Important: the thermostat control outputs are polarized; pay close attention to aine and eneutral connections.

Wiring: as indicated in the figure.

Disconnect the power supply (main breaker).

Connect the supply line to terminals n^2 (eeutral) and n^3 (aine).

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"

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.

a) - 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 thermostat-controlled operation

b) - Continuous fan operation

Connect the wire that comes out of the first hole of the thermostat terminal board (hole 1) to terminal n^3 .

Wiring diagram for solenoid valve control and fan control with continuous fan operation

ÉOMMANNS ANN SIGNALS

OPERATING PMODE

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:

1) thermostat-controlled solenoid valve and continuous fan operation (fig. A)
2) thermostat-controlled solenoid valve and fan operation (fig. A)
3) thermostat-controlled fan operation only and solenoid valve not connected (fig. B)

On 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.

Fig. A

Example of thermostat installation with thermostat-controlled solenoid valve and fan control (continuous or thermostat-controlled)

Fig. B

Example of thermostat installation with fan control only (continuous or thermostat-controlled)

The thermostat operates with proportional temperature control, within a 1^ -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.

Gew55

FRANÇAIS

LOGIQUE PD'APPLICATION

OK

Date of installation

Room in which installed

Installer's stamp and signature