Robertshaw RS311N Installation And Operation Manual
1 2 3 4 250028-001
Installation and Operation
Instructions for
RS311N
1-Heat / 1-Cool
Non-Programmable
Setback
Thermostat
for Gas, Electric, & Heat Pump Systems
www.robertshawclimate.com
TABLE OF CONTENTS
Introduction……………………………………… … ………
2
Standard Features………………………………………...
2
Button Operations…………………………………………
3
Thermostat Locations……………………………………..
3
Removing The Thermostat From The Backplate………
4
Description Of The Dip Switch Functions………………
5
Features And Settings……………………………………
6-7
Cover Lock…………………………………………………
7
Replacing The Thermostat On The Backplate…………
7
Button Press Combinations………………………………
8
Keypad Lockout………………………..………………….
9
Temporary Override………………………………………
9
Setback Input Terminals – Special Functions..………..
9
Changing Fahrenheit (°F) To Celsius (°C)……………..
10
Power Failures…………………………………………….
10
Remote Sensors (Optional)………………………………
10
Setup Menu………………………………………………..
10
Wiring Diagrams…………………………………………..
11-16
Specifications………………………………………………
17
Sensor Faults……………………………………………...
17
Description Of Icons………………………………………
18-19
Display………………………………………………………
19
Warranty…………………………………………………....
19-20
INTRODUCTION
The RS300N family of Non-Programmable Setback Thermostats
represents the most advanced solid-state, microcomputer
temperature control on the market today. The thermostat
incorporates state-of-the-art technology packaged in an extremely
low profile designer series case. They are a direct replacement
for 300 series and DSL series non-programmable units. The
Ultra-Touch push-buttons are combined with an easy-to-read,
blue backlit full function liquid crystal display to provide the
ultimate in user friendly operation of the heating and air
conditioning, including gas, electric, oil and heat pump systems.
STANDARD FEATURES
• No batteries required – always remembers
setpoints
•
Integrated electronic heat anticipation and cooling
droop with
built-in short cycle equipment protection
• Intelligent Fuzzy Logic staging for
ef
ficient operation of
equipment, including auxiliary heat
• Tamper proof electronic keyboard lockout
with
pr
ogrammable
override ranges and time
• Automatic, Manual and Recirculation Fan
operation
• Adjustable Fan Purge after Heating or Cooling Call
• Automatic Heat/Cool Changeover, Cooling Only, or Heating
Only Mode Control
• Adjustable Deadband between Heat and Cool Setpoint in
Auto Changeover
• Dual Heating and Cooling Setpoints for Day (Occupied) and
Night (Unoccupied) operation
• Adjustable Min/Max Setpoints for Heating and Cooling
• Keypad Lockout with restricted +/-3°F(1°C) or +/-5°F(2°C)
setpoint adjustment and 0min to 24Hr override timer with
a
utomatic retur
n
• Selectable Fahrenheit or Celsius
temperature
display
• Adjustable Backlight Brightness
• Integrated Installer Setup Menu
• Occupancy Sensor Inputs (use RS-OSC or RS-OSW)
BUTTON OPERATION
THERMOSTAT LOCATION
To ensure proper operation, the thermostat
should be mounted
on an inside wall in a frequently occupied area of the space. In
addition, its position must be at least 18” (46 cm) from any
outside wall,
and
approximately 5’, (1.5 m) above the floor in a
location with freely circulating air of an average
temperature.
Be sure to avoid the following locations:
• Behind doors or in cor ners where freely
cir
culating air
is
unavailable
• Where direct sunlight or radiant heat
from
appliances might
affect control
operation
• On an outside wall
• Adjacent to, or in line with, conditioned air
discharge grilles,
stairwells or outside
doors
• Where its operation may be affected by steam
or water pipes
or warm air stacks in an adjacent partition, or by any
unheated / uncooled area behind the thermostat
• Where its operation may be affected by
lighting dimmers
next
to it
• Where its operation will be affected by the
supply air of an
adjacent
unit
• Near sources of electrical interference such as
ar
cing
relay
contact
REMOVING THE THERMOSTAT FROM THE
BACKPLATE
1. Insert a flat blade screwdriver or coin 1/8” into the slot located
in the bottom center of the thermostat case and twist 1/4 turn.
When you feel or hear a click, grasp the case from the bottom
two corners and separate from the backplate as shown in the
diagram at the left. Some models require more force than
others when separating due to the number of terminals used.
2. Swing the thermostat out from the bottom.
3. Lift the thermostat up and off the backplate.
4. Place the rectangular opening in the backplate over the
equipment control wires protruding from the wall and, using
the backplate as a template, mark the location of the two
mounting holes
NOTE: There are several versions of the RS300N thermostat.
The wiring instructions for the equipment are identical.
5. Use the supplied anchors and screws for mounting on drywall
or plaster; drill two 3/16” (5mm) diameter holes at the marked
locations; use a hammer to tap the nylon anchors in flush to
the wall surface and fasten backplate using the supplied
screws. (Do not over tighten!)
6. Connect the wires from your system to the thermostat
terminals as shown in the wiring diagrams. Carefully dress the
wires so that any excess is pushed back into the wall cavity or
junction box. Ensure that the wires are flush to the plastic
backplate. The access hole should be sealed or stuffed to
prevent drafts from affecting the thermostat.
NOTE: This product must be supplied from a UL/CSA
LISTED Class 2 power supply. Operation from other supplies
may result in a potential fire risk.
5 6 7 8
DESCRIPTION OF THE DIP SWITCH FUNCTIONS
DIP Switch 1 : GE/HP Operation
Place DIP Switch 1 to OFF position
for Gas/Electric fur
nace
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 to 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 pr
otection.
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
tur
ned 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 r
emote indoor sensor
(10-528 or RS300-528) for temperature
contr
ol.
Place DIP Switch 8 to ON to average
the thermostat’
s inter
nal
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 decalibration, 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.
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