Engineered Comfort Fan Coil Controller EZstat Dokumentacja Pobierz pdf (Strona 11)

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.

Page 11 of 36

  ConnecngtoOn/Ovalves

The following diagram shows the connecons for an on/o valve.

• The valves are actuated by 24 VAC

• The outputs are 24 V relays.

Fig.4-7Connecng

 on/ovalve

COM

B05

 4.4 ConnecngPower

The EZstat requires an external, 24 VAC power source. Use the following guidelines when choosing and wiring

transformers.

• Use only a Class‑2 transformer of the appropriate size to supply power.

• Connect the transformer’s neutral lead to the COM terminal.

• Connect the AC phase lead to the 24VAC terminal.

• Power is applied to the controller when the transformer is powered.

Fig. 4-8 Wiring for EZstat power

COM

24VAC

4.5 Maintenance

Remove dust as necessary from the holes in the top and boom. Clean the display with so, damp cloth and mild soap.

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Engineered Comfort Fan Coil Controller EZstat Dokumentacja Strona 11