TEMPERATURE CONTROLLER FOR 2-BATTERY AIR-HANDLING UNIT OPTIONAL TELEMANAGEMENT XTA 624
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APPLICATION

Designed for the control of ambient temperature and/or of the discharge air in air-handling units comprising:

• 1 or 2 heating and/or cooling battery units.

• 1 air mixing unit or 1 heat regenerator.

Essential detectors:

• 1 room or air duct temperature sensor.

Optional accessories:

• 1 flow temperature sensor.

• 1 pre-heating temperature sensor.

• 1 outside temperature sensor.

• 1 set-point adjuster.

FEATURES

• Power supply: 24V~.
• Consumption: 5VA.
• DIN 105 x 115 modular enclosure.
• Protection: IP 40.
• Digital programming by means of 4 keys and alphanumeric display.
• Two 3-wire modulating outputs or On-Off in two stages (2 equal loads) or three stages (2 unequal loads) configurable for:
  • control of room temperature according to the heating and cooling values requested with summer outside compensation, minimum and maximum limits of flow in order to avoid current of cold air.
  • control of flow temperature in relation to values requested by heating and by cooling with, if required, winter and summer compensation.
  • control of fixed point pre-heating temperature.

• One progressive 0…10 V- output configurable for:

  • control of air mixing in comparison with room - outside temperature (free cooling).

  • control of heat regenerator in relation to room - outside temperature.

• Manual or automatic season switching of the controller functions.

• Adjustment of temperature setting by means of remote control.

• Alarms for plant faults and for open or short sensor circuit.

Code		Description	Data sheet
XTA 624		Temperature controller for two-battery air-handling units.	E 136
ACB 400		Plug-in for communicating via .	-

DETECTORS AND ACCESSORIES