Gewiss GW21852 SUMMER-WINTER ELECTRONIC THERMOSTAT Installational Manual

Gewiss GW21852 SUMMER-WINTER ELECTRONIC THERMOSTAT

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.

PRODUCT DESCRIPTION

FUNCTIONS

PERFORMANCE DATA

• Function summer/winter
• Luminous signals: Led indicating load on/off
• Remote control input for night-time lowering of heating (winter ).
• (Night-time lowering is not possible for summer conditioning ).
• Night time reduction temperature (referring to set): – 4°C

TECHNICAL SPECIFICATIONS

Power supply: 230 V~ 50÷60 Hz

• Type of disconnection and appliance: 1 B / Electronic
• Type of relay output: with exchange contact NO/COM/NC 8(2)A / 250 V~
• User connections (load): 2 or 3 wires
• Max. wire section at the terminals: 2.5 mm2
• Type of insulation: Class II e
• Grade of protection: IP 30
• Pollution: Normal
• Regulation range: from +5°C to +30°C
• Thermal gradient: max 1K/15 min.
• Differential operation: Δt = 0.7°C
• The precision of reading: ± 1°C
• Temperature operating limits: 0°C to +50°C

Reference standards for CE marking:

• EMC EN55014-1 EN55014-2 EN61000-3-2 EN61000-3-3
• LVD EN60730-1 EN60730-2-9
• (Directive 89/336/CEE – 7323/CEE)

INSTALLATION INSTRUCTIONS

LOCATION ADVICE

Recommendations for positioning:
Install the thermostat at a height of approx. 1.50÷1.70 m from floor level, away from heat sources, draughts, doors and windows

Heating systems with thermostat controlling:

• A Wall mounted boiler
• B Burner
• C Circulation pump
• D Zone solenoid valve

Important: The installation and electrical connecting of the devices and appliances must be undertaken by qualified personnel and in accordance with the standards and regulations in force at the time. The manufacturer declines to accept any responsibility concerning the use of the products in accordance with particular environmental or installation regulations, as this responsibility rests entirely with the installer.

Warning: Prior to installing the product, ensure the mains electrical supply is disconnected

With the mains power supply disconnected:

• Connect the power supply cables to terminals N° 4 (Line) and N° 5 (Neutral).
• Connect the wires of the device to be controlled to terminals: n° 1 = common
• n° 2 = norm. open
• n° 3 = norm. closed
• With strong inductive loads (pumps and solenoid valves) it is recommended that anRC filter is connected in parallel to the load.

Remote selection of “Comfort” or “Reduced” temperature

Whenever it is desired to utilise the remote selection of “Comfort” or “Reduced” temperature, connect the external contact to terminals N° 6 and N° 7 of the thermostat

• Comfort” temperature = external contact open
• “Reduced” temperature = external contact closed
• Selection of “Reduced” temperature results in a 4°C reduction with respect to the set temperature.

ELECTRICAL CONNECTION

Example of connections to a boiler and timer to control nighttime reduction

Multiple installations
In multiple installations (offices, schools, homes, etc.) where the nighttime reduction is controlled from a single centralized timer, in addition to the above it is necessary to pay close attention to the following instructions:

• Power supply 230V~
  • Terminal 4: connect to mains Line (230V~)
  • Terminal 5: connect to mains
  • Neutral (return)
  • N.B.: normally with civil mains power supplies “brown” is the recognized color for phase and “blue” for neutral (line return).
• Connections for nighttime reduction
  • All terminals 6: connect in parallel with output 2 of the timer.
  • All terminals 7: connect in parallel with output 1 of the timer

COMMANDS AND SIGNAL

References

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Gewiss GW21852 SUMMER-WINTER ELECTRONIC THERMOSTAT Installational Manual

Gewiss GW21852 SUMMER-WINTER ELECTRONIC THERMOSTAT Installational Manual