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Installation
20 RTU Open
Wiring an SPT sensor
The RTU Open is connected to a wall-mounted space temperature sensor to monitor room temperature.
An i-Vu Open Control System offers the following SPT sensors:
Sensor
Part #
Features
SPS
SPT Standard
•
Local access port
• No operator control
SPPL
SPT Plus
•
Slide potentiometer to adjust setpoint
• MANUAL ON button to override schedule
• LED to show occupied status
• Local access port
SPP
SPT Pro
• LCD display
• MANUAL ON button to override schedule
• WARMER and COOLER buttons to adjust setpoint
• INFO button to cycle through zone and outside air temperatures,
setpoints, and local override time
• Local access port
You wire SPT sensors to the RTU Open's Rnet port. An Rnet can consist of any of the following combinations
of devices wired in a daisy-chain configuration:
• 1 SPT Plus or SPT Pro
• 1–4 SPT Standards
• 1–4 SPT Standards, and 1 SPT Plus or SPT Pro
• Any of the above combinations, plus up to 2 BACview6
NOTES
's but no more than 6 devices total
• If you have 2 BACview6's, the second BACview6 must have a separate power supply with the same
ground as the controller.
• If the Rnet has multiple SPT Standard sensors, you must give each a unique address on the Rnet. See
the Carrier Sensors Installation Guide.
• If the Rnet has multiple BACviews, you must give each a unique address on the Rnet. See the BACview
Installation and User Guide.
Rnet wiring speci ficati ons
NOTE Use the specified type of wire and cable for maximum signal integrity.
Description 4 conductor, unshielded, CMP, plenum rated cable
Conductor 18 AWG
Maximum length 500 feet (152 meters)
Recommended coloring Jacket: White
Wiring: Black, white, green, red
UL temperature rating 32–167°F (0–75°C)