Location Considerations - Johnson Controls TEC2664Z-3 BACnet Installation Instructions Manual

Rooftop
Controller
MS/TP
Bus
Zone
Controller
Figure 1: Typical Zoning Control System Installed on a Single MS/TP Bus
Mounting
Figure 1 illustrates a typical zoning control system
installed on a single MS/TP Bus. This installation
consists of a TEC2664Z-3 Rooftop Controller
controlling a rooftop unit; and multiple Zone
Controllers, each controlling a single zone damper. The
TEC2664Z-3 Rooftop Controller can be wired to an
optional supervisory controller.

Location Considerations

Follow these guidelines for locating the TEC2664Z-3
Rooftop Controller.
• Observe all environmental limits, and be sure that
the rooftop controller mounting location maintains
the ambient operating conditions as described in
the Technical Specifications on page 25.
• Mount the rooftop controller indoors or in an
approved enclosure, where the ambient operating
conditions are always maintained. Do not mount
the rooftop controller where it may be exposed to
water, condensation, other liquids, or corrosive or
flammable vapors of any kind.
2 TEC2664Z-3 BACnet® MS/TP Rooftop Controller for Stand-Alone and Networked Zoning Systems
Installation Instructions
MS/TP
•
Bus
Supply
•
Zone
Damper
Zone
Controller
Rooftop Unit
Return
Bypass
Mixed Airflow
Damper
Bypass Return
Airflow Airflow
•
Zone
Damper
Zone
Controller
IMPORTANT: Before specifying the TEC2664Z-3
Rooftop Controller for plenum applications, verify
acceptance of exposed plastic materials in plenum
areas with the local building authority. Building
codes vary by location. Some local building
authorities accept compliance to UL 1995, Heating
and Cooling Equipment, while others use different
acceptance criteria.
• Mount the rooftop controller in an accessible
location to allow for easy access to the user
interface keys.
• Do not mount the rooftop controller on surfaces
that are prone to vibration, or in areas where
electromagnetic emissions, inductive interference,
or radio frequency signals from other devices or
wiring can interfere with operation or Field Bus
communication.
Zone
•
Damper
RS485 End-of-Line Terminator
(MS-BACEOL-0)