Online Store:
www.syxthsense.com
Copyright
2016 SyxthSense Ltd.
Enquiries: T:
0844 840 3100
F:
0844 840 3200
SRC-131 Hotel Controller Manual
10
5.4
Fault Indication
The SRC-131 can display the text “FLt” alternating with the temperature should you wish to alert the user of an
external fault with the heating or cooling system.
To enable this function enter the installer menu and set the Window contact input setting 31 to option 3. (See
page 16 for this setting). When the WC terminal and the Com-0V terminal are joined the SRC-131 will alternate
“FLt” with the current room temperature.
Register 32 will permit a time delay to be set after the fault signal is received if necessary to reduce false trips.
The fault indication has NO effect on thermostat function
5.5
Door Switch
The Door switch input (DS) is used by the SRC-131 for 3 functions.
1)
To detect that the door has been opened and then closed to let somebody into or out of the room.
2)
To detect if the door has been left open.
3)
To use as an occupancy or Auto-Off timer in training rooms or similar.
The SRC door switch input can be set for a Normally Open (switch open when door is closed) or normally
closed logic (switch closed when door is closed) or OFF (input not used). The Installer menu 30 “Door Input
Logic” and option 31“Door Input Delay” sets the door detection logic in the SRC-131.
5.6
Entering or exiting the room.
Once the door is opened and then closed the SRC-131 will begin its occupancy detection process using the PIR
input described below. Based on the outcome of this process the SRC-131 will remain on and permit guest
interaction with the SRC-131 (adjust mode and set point for example), or switch to “un-occupied” mode where
the SRC-131 will substitute the guest set point and mode for the installer pre-set values.
5.7
Door Left Open
When the door 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 display to indicate that the remote door (or window switch) is holding
the SRC-131 in off mode. This is done to prevent energy waste by trying to heat or cool an open room.
The SRC-131 will automatically restart once the door is closed.
5.8
PIR input
A PIR (passive infra-red) movement detector can be directly wired to the SRC-131 “PIR” input. As movement is
detected by the PIR it will send multiple On/Off pulses to the SRC-131 every time it detects movement. The
SRC-131 using this data along with door switch data will determine the occupancy status of the room and
behave accordingly. Note, the PIR must be separately powered, typically from a 12VDC supply.
5.9
Automatic Occupancy Detection Logic
Automatic occupancy detection requires the door switch and PIR input to be wired and working.
When the door is first opened the SRC-131 instantly enters “Occupied Mode” where the SRC-131 will permit the
guest to set their desired temperature and mode of operation. Once the door is closed the SRC-131 will “look”
for movement as detected by the PIR sensor wired to the PIR input. If no movement is seen within the installer
pre-set seek time (installer adjustable 1 to 15 minutes) the SRC-131 will enter “Un-occupied mode” where the
guest’s temperature and mode will be replaced with installer pre-set values. Should movement be detected
within the installer pre-set seek time the SRC-131 will LOCK into “Occupied Mode” and no longer rely on
continued movement within the room to remain in “Occupied Mode”. Next time the door is opened and then
closed again the SRC-131 will again begin its occupancy detection process.
Note - even when the SRC-131 is in “un-occupied mode” it will continue to use the PIR input to determine room
occupancy. For example - a couple may be staying in the room and one leaves the room leaving the other
asleep in bed. As the door closes the SRC-131 will seek movement and when none is found it will enter “un-
occupied mode. As the sleeper wakes and then moves the SRC-131 will automatically re-enter “Occupied
Mode” even though it may have been some time since the door was closed.
