Engineered Comfort Fan Coil Controller EZstat - Connecting System Outputs

Installation and Operation Manual
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Fan Coil Controller – EZstat
EC-EZstat
Date: 9-2014 Supersedes: NEW
Engineered Comfort reserves the right to change any information concerning product or specification without notice or obligation.
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Water temperature sensor
Connect a 10kΩ, Type III thermistor temperature probe (Nailor part #H1‑1764B) to the water temperature (WST) input.
The input includes the internal pull‑up resistor. Follow the instrucons supplied with the sensor for installaon.
 4.3 ConnecngOutputs
The EZstat outputs are congured for specic applicaons.
• Depending on the conguraon, the EZstat outputs are designed for either 24 VAC or 0‑10 VDC loads.
• The outputs may represent analog or digital signals.
Fig. 4-3 Wiring for a water temperature sensor
Improperly connecng loads or equipment to output terminals may damage the equipment.
Connect only as shown in the following diagrams or applicaon drawings.
WST
GND
  Connecngtoathree-speedfan
The following diagram shows the connecons for a three‑speed fan. The fan circuits must be a 24 VAC pilot duty only.
• For a single‑speed fan, use only the FAN‑L connecon.
• For a three‑speed, use FAN‑L, FAN‑M, and FAN‑H
Fig. 4-4
Conneconstoa
three-speed fan
COM
FAN-L
FAN-H
FAN-M
R