Carrier RTU OPEN 11-808-427-01 - Manual (Page 26)

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
SPT Standard SPS
• Local access port
• No operator control
SPT Plus SPPL
• Slide potentiometer to adjust setpoint
• MANUAL ON button to override schedule
• LED to show occupied status
• Local access port
SPT Pro SPP
• 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 BACview 6 devices, but no more than 6 devices total
NOTES
•
If you have 2 BACview 6 devices, the second BACview 6 device 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 BACview devices, you must give each a unique address on the Rnet. See the
BACview Installation and User Guide.
Rnet wiring specifications
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)