Carrier RTU OPEN 11-808-427-01 - Manual (Page 49)

RTU Open 43
The RTU Open supports various types of constant volume air source configurations:
•
Standard heat/cool unit types with up to 2-stages of mechanical cooling and gas or electric heating
• Heat pump units utilizing a reversing valve output for heating and cooling control
• Heat pump unit (Carrier) with an OEM control board
• Economizer, CO2, Demand Limiting, and RH control strategies are available for appropriately equipped
units
The RTU Open may operate as part of a linked VVT system or as a stand-alone controller.
Occupancy
The RTU Open’s operation depends upon its occupancy state (Occupied/Unoccupied). The RTU Open
operates continuously in the Occupied mode until you configure an occupancy schedule.
An occupancy schedule may be:
•
A local schedule configured in the controller using a BACview device or Field Assistant
• A BACnet schedule configured in the i-Vu application, networked through an i-Vu Open Router
• A BACnet or local schedule configured for subordinate VVT Zones, networked through an i-Vu Open
Router(s) and employing Linkage
To set up occupancy schedules, consult the documentation for your user interface.
NOTE
A BACnet schedule, downloaded from the i-Vu application will overwrite a local schedule that was set
up with a BACview device or Field Assistant.
Occupancy Source
- the following settings determine occupancy. See Unit configuration (page 60).
Options:
•
Always Occupied – Controller operates continuously, regardless of any configured schedule
• BAS On/Off – Occupancy is set over the network by another device or a third party BAS. Refer to the RTU
Open Integration Guide for additional instructions in communication protocols.
• Remote Occ Input – Controller monitors an input contact connected to one of the available binary inputs
configured to receive it. You must set Unit Configuration > Occupancy Source to Remote Occ Input and
one Input Switch Configuration to Remote Occupancy.
Sequence of Operation