Robertshaw RS311N, Installation And Operation, Page: 2 / 5

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DESCRIPTION OF THE DIP SWITCH FUNCTIONS
DIP Switch 1 : GE/HP Operation
Place DIP Switch 1 to OFF position for Gas/Electric furnace
operation.
Place DIP Switch 1 to ON position for Heat Pump operation.
DIP Switch 2 : CLK Terminal Operation
Place DIP Switch 2 to OFF position t o allow a short across the
CLK terminals via contact closure or Robertshaw® Occupancy
Sensor to engage Night (Unoccupied) operation until released.
Place DIP Switch 2 to ON position to allow a short to change the
thermostat to OFF mode until released.
DIP Switch 3 : 2 Minute or 4 Minute Minimum Off Times
When DIP Switch 3 is in the ON position, the minimum OFF time
is 2 minutes. When in the OFF position it is set to 4 minutes. The
system will allow equipment recovery for 2 or 4 minutes before
turning on again. This is also known as short cycle protection.
DIP Switch 4 : Unlocked/Locked Keypad
When DIP Switch 4 is in the ON position, all buttons are disabled
with the exception of the UP, DOWN and MODE button. Users
will be restricted to either a +/-3°F(1°C) or +/-5°F(2°C) range from
the Day (Occupied) setpoints as defined by DIP Switch 7. Users
will still be able to alternate between HEAT and COOL.
DIP Switch 5 : Plenum Fan Switch /Add-On Heat Pump
DIP Switch 5 is used to determine when the fan needs to be
turned on.
Place DIP Switch 5 to OFF and DIP Switch 1 to OFF to have the
fan turn on immediately when there is a call for heat. (Required
with electric heat.)
Place DIP Switch 5 to ON and DIP Switch 1 to OFF to have the
plenum switch operate the fan.
Place DIP Switch 5 to OFF and DIP Switch 1 to ON for normal
heat pump operation.
Place DIP Switch 5 to ON and DIP Switch 1 to ON for Add-On
(Dual-Fuel) Heat Pump operation.
DIP Switch 6 : OFF
Keep OFF
DIP Switch 7 : Temporary Override Adjustment Range
Place DIP Switch 7 to OFF to limit temporary adjustments to
+/-3°F(1°C).
Place DIP Switch 7 to ON limit temporary adjustments to
+/-5°F(2°C) .
DIP Switch 8 : Remote Sensor Operation
Place DIP Switch 8 to OFF to only use the remote indoor sensor
(10-528 or RS300-528) for temperature control.
Place DIP Switch 8 to ON to average the thermostat’s internal
sensor with the remote indoor sensor(s).
NOTE: If no remote sensor is used, the thermostat will default to
the thermostat sensor regardless of the DIP Switch setting.
FEATURES AND SETTINGS
Random Restart
After a power failure, the thermostat will delay the heating/ cooling
equipment start-up by 8-40 seconds. When multiple Robertshaw®
RS300N thermostats are used, this minimizes the ‘in rush’ current
(electric power usage) as it reduces the number of HVAC units
that will be turned on simultaneously.
Override Timer Configuration
The length of a temporary override can be adjusted from 0
minutes to 24 hours, in 10 minute increments. (0 minutes is a
complete lockout). The default override time is 8 hours. To
display/set the Override time, either use the integrated setup
menu or press the MODE and DAY/NIGHT buttons
simultaneously, then press the UP or DOWN button.
Recirculation Fan Configuration
Using the Setup Menu, Recirculation Fan can be set for up to 30
minutes of fan operation per hour.
Default is 0min.
Fan Purge Configuration
Using the Setup Menu, Fan Purge time can be set for up to 60
seconds of fan run after a heating or cooling call in order to
release remaining conditioned air into the space.
Default is 0sec.
Temperature Calibration (De-calibration)
The thermostat is pre-calibrated at the factory, but in some
installations, lack of airflow at the sensor or proximity to other
warming or cooling source may cause the temperature to be off
by a few degrees. To adjust the room temperature reading (with
or without a remote indoor sensor connected), press and hold
the Fan button for 12 seconds. The display will then show the
room temp with 0.06F degree resolution. Press the UP or
DOWN button to make the adjustment. Press the RESUME
button to store the new value. To restore the thermostat to
factory calibration, while in calibration mode, press the MODE
button to reset and then the RESUME button to store.
FEATURES AND SETTINGS, continued
COVER LOCK
You also may lock the cover down to prevent unauthorized
access to the thermostat by adding the clear plastic lock (included
in the installation bag). To install, remove the thermostat from the
backplate and place the clear plastic lock in the backplate as
shown below. Replace the thermostat and close the cover. The
cover now is locked. To open, simply use a screwdriver to
carefully push the lock back, allowing the cover to open. To
remove the lock, open the cover, remove the thermostat from the
backplate, and then remove the lock.
REPLACING THE THERMOSTAT ON THE
BACKPLATE
1. Position the thermostat on the hinged tabs located at the top
of the backplate.
2. Gently swing the thermostat down and press on the bottom
center edge until it snaps in place.
BUTTON PRESS COMBINATIONS
Single Press
•
MODE Changes from COOL to HEAT to
AUTO to OFF.
•
FAN Sets the fan ON (continuous), or AUTO
(operates with the equipment), or CIRC
(recirculation).
.
•
RESUME
When the keypad is locked, cancels
temporary setpoint overrides and
resumes previous operating mode.
•
DAY/NIGHT Alternates between Day (Occupied)
and Night (UnOccupied) setpoints.
•
UP Increments the blinking numerical or
icon segments of the display.
•
DOWN Decrements the blinking numerical or
icon segments of the display.
Multi-Press
•
UP & DOWN Toggles between °F and °C.
•
FAN &
DAY/NIGHT Changes backlight setting. On, dim or
off. (After 15 seconds of inactivity)
•
MODE &
DAY/NIGHT Changes the Override Timer. Press
both, then press UP or DOWN to
change the override time from 0
minutes to 24hrs in 10 minute
increments
PRESS & HOLD (12 seconds unless stated otherwise)
•
UP & Down
•
MODE
(HOLD for 2 seconds)
Enters the Setup Menu
Resets the thermostat to factory
defaults. Press and hold the MODE
button to show the number of resets.
Press the MODE button a second time
to reset the defaults.
•
FAN Enters thermostat sensor de-calibration
mode. Allows a temperature offset of
up to +/-6°F. To remove the de-
calibration, press and hold the MODE
button.
•
MODE &
RESUME Allows for adjustment of High and Low
balance points when displaying outdoor
temperature (hold for 5 seconds).
NOTE: There must be an outdoor
sensor attached for this feature to be
available.