Wcs Mounting Surfaces; Design Consideration For Bci-I, Bci-R, Bci2-I And Bci2-R - Trane Air-Fi WCS-SB Installation, Operation And Maintenance Manual

Pre-Installation

WCS Mounting Surfaces

Using the hardware provided, mount the back plate of the sensor to a flat surface such as sheetrock or
plaster, or to an electrical junction box. The sensor must be mounted plumb for accurate temperature
control and to ensure proper air movement through the sensor.
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Design Consideration for BCI-I, BCI-R, BCI2-I and BCI2-R

A best practice when designing Air-Fi® networks used on BCI-I, BCI-R, BCI2-I and BCI2-R controllers is
to always provide a wired sensor in the unit's return section as a backup in case wireless BACnet
communication is lost. The Air-Fi temperature sensor information is mapped to the ReliaTel or IPak
controller like a BAS point. If the WCI coordinator fails and the network goes down, the unit thinks it has
lost the local space temperature, so it shuts down in response. Having a wired sensor in the return
section for the unit to default to in case the wireless network fails is inexpensive insurance against this
type of unit shutdown.
While Air-Fi® Wireless sensors may be applied with BACnet MS/TP and BACnet/IP (both hardwired and
Wi-Fi), such applications specifically exclude all forms of BCI, since the BCI communication selections
for Air-Fi® and BACnet are mutually exclusive and cannot exist at the same time.
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If mounting onto sheetrock or plaster, use the plastic threaded anchors (pre-drilling holes is not
usually necessary) and the two M3.5 x 20 mm mounting screws.
For mounting onto an electrical junction box, use the two 6-32 x 3/4 in. screws.
BAS-SVX40K-EN