S&P WCT Manual página 7

ENGLISH
WCT is a proportional thermostat that allows the management of supply air temperature in
Ventilation Units and air curtains equipped with hot and cold water coils
arnings
This product has been manufactured in full compliance with applicable safety regulations and EU
standards.
Please read this instruction book carefully, as it contains important information for your
safety during the installation, use and maintenance of this product. Keep it at hand for future
reference. Please check that the appliance is in perfect condition when you unpack it, as all
factory defects are covered by the S&P guarantee. The CE mark and the corresponding
declaration of conformity are proof of the product's conformity with current EU regulations.
Security
Before making the electrical connections disconnect the power line through the corresponding
main switch.
Check that the electrical supply voltage is the same that the indicated on the unit nameplate. This
unit is designed for use indoors. Do not use this unit in explosive or corrosive atmospheres or in
areas with high relative humidity.
Installation
Locate the temperature sensor supplied with the unit in the supply air indoor duct / supply
diffusor after passing through water coil, see FIG.1.A and FIG. 1.B.
Make the electrical connection of the temperature sensor, three-way valve servo motor and
power supply as indicated in the wiring diagram FIG.4.
Operation
WCT thermostat can manage one three-way valve with proportional actuator. 0-10V signal
modulation depends on the following:
Cold/Heat operating mode (depending on VU model),
Temperature set point adjusted using frontal wheel, and
Supply air temperature measured
Proportional control will follow charts below:
HEAT operating COLD operating
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