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Circulation units and screens with water heater can be controlled by a two-way or three-way valve fitted with a thermostatic head with a 2 m long capillary line. The head contains a safety device to prevent the temperature from exceeding 30 K above the set point. The control range can be limited or blocked. Threaded connection of the head M 30 x 1,5. The three-way valve is connected to the heater return as shown. The temperature sensor probe is placed in the outlet
air stream. The two-way valve shall be connected to the heating water inlet as shown in the diagram. The air temperature can be set in the range of 20 to 50 ˚C.
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