Engineered Comfort Fan Coil Controller EZstat Especificaciones descargar pdf (Pagina 34)

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 34 of 36

Illustraon8–1BACnetMS/TPnetworkwiring

The dierence between the PID Loop types.

• CLLOOP/HTLOOP-directlycontrolsthefanandmodulatesoofroomtemperature

• CL_DAT LOOP/HT_DAT LOOP - modulate to the DAT setpoints. The valves are controlled o these loops.

 8.2 ConnecngtoMS/TPnetwork

Before connecng the EZstat to a BACnet MS/TP network, congure the network properes. See the topic Set up

communicaons in for the procedure to set the following:

• Device instance

• MAC address

• Baud

Use the following principles when wiring the EZstat to an MS/TP network:

• Connect no more than 128 addressable BACnet devices to one MS/TP network. The devices can be any mix of EZstat

controllers, other BACnet controllers, or BACnet routers.

• To prevent network trac bolenecks, limit the MS/TP network size to 60 controllers.

• Use 18 gauge, twisted pair, and shielded cable with capacitance of no more than 51 picofarads per foot for all network

wiring. Belden cable model #82760 meets the cable requirements.

• Connect the ‑A terminal in parallel with all other ‑ terminals. Connect the +B terminal in parallel with all other +

terminals. Connect the shield to an earth ground at one end only.

• Use a KMD‑5575 repeater between every 32 MS/TP devices or if the cable length will exceed 4000 feet (1220 meters).

Use no more than seven repeaters per MS/TP network.

• Place a KMD‑5567 surge suppressor in the cable where it exits a building.

-A

NOTE

Value object Name Descripon

LOOP1 CL LOOP Cooling Loop

LOOP2 HT LOOP Heang Loop

LOOP3 CL_DAT LOOP Cooling Loop

LOOP4 HT_DAT LOOP Heang Loop

Table8-9 PIDcontrolloops

1 2 ... 29 30 31 32 33 34 35 36

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Engineered Comfort Fan Coil Controller EZstat Especificaciones Pagina 34