BAS-SVX40K-EN
23
Unit controller
For a unit controller installation, the most typical WCI mounting location is on the sheet metal enclosure
of the unit controller or HVAC equipment housing.
Coordinator location
For optimum network performance and reliability, the coordinator WCI should be centrally located within
the network. See the Air-Fi® Network Design Best Practices Guide (BAS-SVX55) for more detail.
Repeater location
A WCI can be installed to route messages between a network and WCIs and WCSs that would
otherwise be out of range of the network. When choosing a location for a repeater WCI, consider the
availability of a 24 Vac/Vdc power source to meet its power requirement. (See “Repeater
Applications,” p. 34 for installation information.)
Table 7. WCI location recommendation for RTU installations
RTU Application
Recommended WCI Location Notes
RTU/VAV Factory or field install in RTU return
section directly above roof opening
Design radius reduced from 200 ft to 100 ft.
Lowest cost, serviceable, and proven reliability due to
proximity of VAV boxes.
RTU only Install WCI below roof deck within 200’ of
network coordinator WCI
Maintains 200 ft design radius and provides reliable
communication, but increases cost.
Ensure WCI is in a serviceable location.
Use wired sensors if located below top floor.
RTU on grade/ducted
(RTU/VAV or RTU only
Install WCI inside building within 200’ of
network coordinator WCI
Maintains 200 ft design radius and provides reliable
communication, but increases cost.
Use wired sensors above first floor.
WCS Installation Locations
Note: To comply with FCC regulations, do not mount this sensor within 20 cm (8 inches) )of any other
radio device including other WCS sensors or other wireless devices.
When selecting a WCS location, avoid the following:
• Areas of direct sunlight
• Areas in the direct airstream of air diffusers
• Exterior walls and other walls that have a temperature differential between the two sides
• Areas that are close to heat sources such as sunlight, appliances, concealed pipes, chimneys, or
other heat-generating equipment
• Drafty areas
• Dead spots behind doors, projection screens, or corners
Note: A corner mount is acceptable with the use of the corner mount bracket for CO
2
and
occupancy installations.
• Walls that are subject to high vibration
• Areas with high humidity
• High traffic areas (to reduce accidental damage or tampering)
• Placing the sensor inside metal enclosures
WCS Height Requirements
The recommended maximum mounting height is 54 inches from the bottom of the back plate to the floor.
If a parallel approach by a person in a wheelchair is required, reduce the maximum height to 48 inches.
Notes:
• Consult section 4.27.3 of the 2002 ADA (Americans with Disability Act) guideline, and local
building codes, for further details regarding wheelchair requirements.
• Sensors with Occupancy and/or CO
2
may need to be mounted higher.
Pre-Installation
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