Robertshaw RS311N, Installation And Operation, Page: 3 / 5

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KEYPAD LOCKOUT
When DIP Switch #4 is ON, the keypad is locked and temporary
adjustment to the setpoints are restricted to a setpoint range of
+/-3°F(1°C) or +/-5°F(2°C) from the Day (Occupied) setpoints for
the amount of time set in the override timer.
TEMPORARY OVERRIDE
(in KEYPAD LOCKOUT MODE)
Change the temperature setting temporarily without affecting the
Day (Occupied) and Night (Unoccupied) setpoints, even though
the keypad is locked.
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Press the UP or DOWN button. If running in Day (Occupied),
the current occupied setpoint will be shown, and if running in
Night (Unoccupied), the current occupied setpoint will be
shown.
•
Press the UP or DOWN button again. The current Day
(Occupied) setpoint will be shown and an Override will be
started. If in AUTO mode, press the MODE button to switch
between heating and cooling setpoints.
•
Press the UP or DOWN button again to adjust the
temperature up to the maximum of +/-3°F(1°C) or +/-5°F(2°C)
for the duration of the override time.
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To cancel, simply press the RESUME button.
SETBACK INPUT TERMINALS
The CLK terminals allow for two powerful methods to operate the
thermostat in special conditions when an external stimulus is used
to short the CLK1/CLK2 terminals. This allows an external time
clock or other external relay, or a Robertshaw® Occupancy
Sensor to be incorporated into the control.
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Setback with No Override
With DIP Switch 2 in the OFF position, DIP Switch 4 in the
OFF position (Keypad Unlocked), and then the CLK terminals
are shorted, the thermostat will lock into Night (Unoccupied)
operation (and setpoints) as long as the terminals are
shorted. Keypad DAY/NIGHT presses and will be ignored
until the short is removed.
•
Setback with Override
With DIP Switch 2 in the OFF position, DIP Switch 4 in the
ON position (Keypad Locked), and then the CLK terminals are
shorted, the thermostat will go into Night (Unoccupied)
operation (and setpoints) as long as the terminals are
shorted. Keypad DAY/NIGHT presses and will be ignored
until the short is removed, but an override to Day (Occupied)
setpoints can be achieved by pressing the UP or DOWN
buttons. The override will last as long as the override timer.
See ‘TEMPORARY OVERRIDE’. When the short is removed,
the thermostat will return to its last state and the
communications can again set Day/Night operation.
•
Set Mode to OFF with CLK Terminals
When DIP Switch 2 is in the ON position and the CLK
terminals are shorted, the thermostat will change to OFF
mode and only the FAN button can be used until the short is
removed. This feature allows a 3
rd
party set of contacts (such
as door or window sensors) to be connected to the CLK
terminals to shut down the HVAC equipment when a door or
window is open. The installer is responsible for any
necessary time delay to be added to the contacts as needed
to perform the desired function. When the short is removed,
the thermostat will revert to its previous operation.
CHANGING FAHRENHEIT (°F) TO CELSIUS (°C)
To change between °F and °C, use the integrated set up menu or
simultaneously press the UP and DOWN buttons. The display will
change automatically.
POWER FAILURES
This Robertshaw® thermostat product will maintain the operation
settings during any type of power failure. When power is restored
the thermostat will return to the last MODE (Heat, Cool, Auto, Off)
and the DAY (Occupied) setpoints. If the CLK terminals are
shorted at power up, the thermostat will operate using the last
NIGHT (Unoccupied) setpoints.
SETUP MENU
The RS300N family of thermostats has an integrated Setup Menu,
allowing quick access to the following setup functions. To access
the menu, simultaneously press and Hold the UP and DOWN
buttons for seconds. When the display changes, use the UP or
DOWN buttons to select the option needed, the MODE button to
go to the next setup function, and the RESUME button to save
and exit. If there are no additional button presses for 15 seconds,
the thermostat will store, exit and return to normal operation. All
settings are stored in non-volatile memory.
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Setup Menu Order:
1. °F or °C Temperature Display
2. Backlight Brightness Level: On, Low, or Off
3. Mode Options: Automatic Changeover, Cooling
Only or Heating Only
4. Min/Max Setpoint Range: Heat High, Heat Low,
Cool High, Cool Low
5. Calibration: For creating a temperature offset
6. Fan Recirculation: 0min to 30min per hour
7. Fan Purge: 0sec to 60sec after call
8. Override Timer: Set from 0min to 24Hr