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SRC-131 Hotel Controller Manual
9
5
Wiring Examples – Ancillary Functions
Additional capabilities can be used when wiring the SRC-131 to external devices. These include BAS, room
occupancy detection systems, door card readers and the optional SyxthSense outside door stations.
5.1
Complete System Overview
As can be seen by the diagram to the left, the SRC-131 is the hub
of a sophisticated hotel room HVAC control and management
system.
Connecting the SRC-131 to an automatic occupancy detection system
such as the SyxthSense SRC-OC (optional) permits you to precisely
control HVAC energy consumption by automatically selecting a more
economical room set temperature when the room is unoccupied.
The optional door station connects quickly and easily to the SRC-
131. This provides the hotel guest with the ability to request
privacy or call for housekeeping when needed. A doorbell function is
also provided.
Network communications enables the room to be “turned on”
remotely as a guest arrives and “shut down” at checkout – further
saving money on energy costs.
Regardless of the need to control conferential HVAC systems, 2 or 4
pipe fan coils with modulating valves the SRC-131 has the necessary
outputs to achieve your control needs.
5.2
Occupancy Detection
The SRC-131 has sophisticated logicthat when
connected to your choice of movement sensors, door
and window switches will automatically control the set
point and mode of the SRC-131.
Using part or all of the functions described below
are completely optional. The SRC-131 will function
perfectly as a HVAC controller without the door, window
or occupancy detection logic enabled.
5.3
Window Contact
The window contact input (WC) is used to automatically disable the HVAC system if a window is left open. This is
done to prevent energy waste by trying to heat or cool an open room.
The SRC-131 window input can be set for a Normally Open (switch open when window is closed) or normally
closed logic (switch closed when window is closed). When the window is left open for longer than the pre-set
time (0 to 300 seconds) the SRC-131 will automatically turn OFF. The text “OFF” will flash in the LCD to indicate
that the remote window (or door switch) is holding the SRC-131 in off mode. The wall controller will prohibit all
changes.
The SRC-131 will automatically restart once the window is closed.
The Installer menu option 28 “Window Input Logic” and option 29 “Window Input Delay” sets the window
detection logic in the SRC-131.
